
From nobody Tue Jan  3 14:20:52 2017
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Subject: [mpls] Last Call: <draft-ietf-mpls-residence-time-12.txt> (Residence Time Measurement in MPLS network) to Proposed Standard
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The IESG has received a request from the Multiprotocol Label Switching WG
(mpls) to consider the following document:
- 'Residence Time Measurement in MPLS network'
  <draft-ietf-mpls-residence-time-12.txt> as Proposed Standard

The IESG plans to make a decision in the next few weeks, and solicits
final comments on this action. Please send substantive comments to the
ietf@ietf.org mailing lists by 2017-01-17. Exceptionally, comments may be
sent to iesg@ietf.org instead. In either case, please retain the
beginning of the Subject line to allow automated sorting.

Abstract


   This document specifies G-ACh based Residence Time Measurement and
   how it can be used by time synchronization protocols being
   transported over MPLS domain.

   Residence time is the variable part of propagation delay of timing
   and synchronization messages and knowing what this delay is for each
   message allows for a more accurate determination of the delay to be
   taken into account in applying the value included in a PTP event
   message.




The file can be obtained via
https://datatracker.ietf.org/doc/draft-ietf-mpls-residence-time/

IESG discussion can be tracked via
https://datatracker.ietf.org/doc/draft-ietf-mpls-residence-time/ballot/

The following IPR Declarations may be related to this I-D:

   https://datatracker.ietf.org/ipr/2626/






From nobody Tue Jan  3 17:06:16 2017
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Subject: [mpls] I-D Action: draft-ietf-mpls-tp-aps-updates-02.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Multiprotocol Label Switching of the IETF.

        Title           : Updates to MPLS Transport Profile (MPLS-TP) Linear Protection in Automatic Protection Switching (APS) Mode
        Authors         : Jeong-dong Ryoo
                          Taesik Cheung
                          Huub van Helvoort
                          Italo Busi
                          Guangjuan Wen
	Filename        : draft-ietf-mpls-tp-aps-updates-02.txt
	Pages           : 9
	Date            : 2017-01-03

Abstract:
   This document contains updates to MPLS Transport Profile (MPLS-TP)
   linear protection in Automatic Protection Switching (APS) mode
   defined in RFC 7271.  The updates provide rules related to the
   initialization of the Protection State Coordination (PSC) Control
   Logic, in which the state machine resides, when operating in APS
   mode, and clarify some operation related to state transition table
   lookup.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-mpls-tp-aps-updates/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-mpls-tp-aps-updates-02

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https://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-tp-aps-updates-02


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until the htmlized version and diff are available at tools.ietf.org.

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ftp://ftp.ietf.org/internet-drafts/


From nobody Sun Jan  8 17:19:11 2017
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Subject: [mpls] I-D Action: draft-ietf-mpls-static-yang-02.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Multiprotocol Label Switching of the IETF.

        Title           : A YANG Data Model for MPLS Static LSPs
        Authors         : Tarek Saad
                          Kamran Raza
                          Rakesh Gandhi
                          Xufeng Liu
                          Vishnu Pavan Beeram
                          Himanshu Shah
                          Igor Bryskin
                          Xia Chen
                          Raqib Jones
                          Bin Wen
	Filename        : draft-ietf-mpls-static-yang-02.txt
	Pages           : 18
	Date            : 2017-01-08

Abstract:
   This document contains the specification for the MPLS Static Label
   Switched Paths (LSPs) YANG model.  The model allows for the
   provisioning of static LSP(s) on LER(s) and LSR(s) devices along a
   LSP path without the dependency on any signaling protocol.  The MPLS
   Static LSP model augments the MPLS base YANG model with specific data
   to configure and manage MPLS Static LSP(s).


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-mpls-static-yang/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-mpls-static-yang-02

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https://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-static-yang-02


Please note that it may take a couple of minutes from the time of submission
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From nobody Wed Jan 11 07:48:27 2017
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Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors 
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense. 

In section 3, "IANA will be asked" should be made active. Say "This
document 
asks IANA to" and point to the IANA consideration section. Apply
similar 
treatment to the other places where you talk about future IANA
actions. 

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive): 

  Section 3: "set 1 according" -> "set to 1 according" 
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7." 
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"   

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008]. 




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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 11 Jan 2017 10:36:18 -0800
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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--001a113d448c6d4df90545d5e091
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Hi Robert,
thank you for your the most detailed review and helpful comments. I'll
prepare -13 version based on your suggestions.
Please find my responses, notes in-lined and tagged GIM>>

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com> wrote:

> Reviewer: Robert Sparks
> Review result: Ready with Nits
>
> I am the assigned Gen-ART reviewer for this draft. The General Area
> Review Team (Gen-ART) reviews all IETF documents being processed
> by the IESG for the IETF Chair.  Please treat these comments just
> like any other last call comments.
>
> For more information, please see the FAQ at
> <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
>
> Document: draft-ietf-mpls-residence-time-12
> Reviewer: Robert Sparks
> Review Date: 2017-01-10
> IETF LC End Date: 2017-01-17
> IESG Telechat date: 2017-02-02
>
> Summary: Ready (with nits) for publication as a Proposed Standard
>
> I have two primary comments. I expect both are rooted in the authors
> and working group knowing what the document means instead of seeing
> what
> it says or doesn't say:
>
> 1) The document is loose with its use of 'packet', and where TTLs
> appear when
> they are discussed. It might be helpful to rephrase the text that
> speaks
> of RTM packets in terms of RTM messages that are encoded as G-ACh
> messages and
> not refer to packets unless you mean the whole encapsulated packet
> with MPLS
> header, ACH, and G-ACh message.
>
GIM>> Will use "message" as you've suggested. Indeed, interchangeable use
of packet and message does confuse.

>
> 2) Since this new mechanic speaks in terms of fractional nanoseconds,
> some
> discussion of what trigger-point you intend people to use for taking
> the
> precise time of a packet's arrival or departure seems warranted. (The
> first and
> last bit of the whole encapsulated packet above are going to appear at
> the
> physical layer many nanoseconds apart at OC192 speeds if I've done the
> math
> right). It may be obvious to the folks discussing this, but it's not
> obvious
> from the document.  If it's _not_ obvious and variation in technique
> is
> expected, then some discussion about issues that might arise from
> different
> implementation choices would be welcome.
>
GIM>> G.8013, formerly Y.1731, does not require or define when a time stamp
must be taken. The document only indicates during which process time been
taken, e.g.:
TxTimeStampf: Timestamp at the transmission time of ETH-DM frame
 RxTimeStampf: Timestamp at the time of receiving frame with ETH-DM request
information.
What is important for quality of measurement is for an implementation to be
reading and writing in timestamp at the same stage of processing the RTM
packet and avoiding queuing/de-queuing in order to avoid impact of jitter
caused by queuing/de-queuing.

>
> The rest of these are editorial nits:
>
> It would help to pull an overview description of the difference
> between
> one-step and two-step much earlier in the document. I suggest in the
> overview
> in section 2. Otherwise, the reader really has to jump forward and
> read section
> 7 before section 3's 5th bullet makes any sense.
>
GIM>> Will try.

>
> In section 3, "IANA will be asked" should be made active. Say "This
> document
> asks IANA to" and point to the IANA consideration section. Apply
> similar
> treatment to the other places where you talk about future IANA
> actions.
>
GIM>> Will make changes accordingly.

>
> There are several places where there are missing words (typically
> articles or
> prepositions). You're less likely to end up with misinterpretations
> during the
> RFC Editor phase if you provide them before the document gets that far
> in the
> process. The spots I found most disruptive were these (this is not
> intended to
> be exhaustive):
>
>   Section 3: "set 1 according" -> "set to 1 according"
>   Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
>   Section 4.2: "Detailed discussion of ... modes in Section 7."
>                         -> "Detailed discussion of ... modes appears
> in Section 7."
>   Section 10: "most of" -> "most of all"
>
GIM>> Thank you, will make the changes.

>
> In Setion 3.1 at "identity of the source port", please point into the
> document
> that defines this identity and its representation. I suspect this is a
> pointer
> into a specific section in IEEE.1588.2008].
>
GIM>>  Will add the reference.

--001a113d448c6d4df90545d5e091
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Robert,<div>thank you for your the most detailed review=
 and helpful comments. I&#39;ll prepare -13 version based on your suggestio=
ns.</div><div>Please find my responses, notes in-lined and tagged GIM&gt;&g=
t;</div><div><br></div><div>Regards,</div><div>Greg</div><div class=3D"gmai=
l_extra"><br><div class=3D"gmail_quote">On Wed, Jan 11, 2017 at 7:48 AM, Ro=
bert Sparks <span dir=3D"ltr">&lt;<a href=3D"mailto:rjsparks@nostrum.com" t=
arget=3D"_blank">rjsparks@nostrum.com</a>&gt;</span> wrote:<br><blockquote =
class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1=
px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:=
1ex">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.=C2=A0 Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" rel=3D"norefe=
rrer" target=3D"_blank">https://trac.ietf.org/trac/<wbr>gen/wiki/GenArtfaq<=
/a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-<wbr>time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn&#39;t say:<br>
<br>
1) The document is loose with its use of &#39;packet&#39;, and where TTLs<b=
r>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br></blockquote><div>GIM&gt;&gt; Will use &=
quot;message&quot; as you&#39;ve suggested. Indeed, interchangeable use of =
packet and message does confuse.=C2=A0</div><blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-styl=
e:solid;border-left-color:rgb(204,204,204);padding-left:1ex">
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet&#39;s arrival or departure seems warranted. (The<b=
r>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I&#39;ve done the<=
br>
math<br>
right). It may be obvious to the folks discussing this, but it&#39;s not<br=
>
obvious<br>
from the document.=C2=A0 If it&#39;s _not_ obvious and variation in techniq=
ue<br>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br></blockquote><div>GIM&gt;&gt; G=
.8013, formerly Y.1731, does not require or define when a time stamp must b=
e taken. The document only indicates during which process time been taken, =
e.g.:</div><div>TxTimeStampf: Timestamp at the transmission time of ETH-DM =
frame</div><div>=C2=A0RxTimeStampf: Timestamp at the time of receiving fram=
e with ETH-DM request information.</div><div>What is important for quality =
of measurement is for an implementation to be reading and writing in timest=
amp at the same stage of processing the RTM packet and avoiding queuing/de-=
queuing in order to avoid impact of jitter caused by queuing/de-queuing.</d=
iv><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bord=
er-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204=
);padding-left:1ex">
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3&#39;s 5th bullet makes any sense.<br></blockquote><div>G=
IM&gt;&gt; Will try.=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"=
margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;bord=
er-left-color:rgb(204,204,204);padding-left:1ex">
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br></blockquote><div>GIM&gt;&gt; Will make changes accordingly.=C2=
=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8e=
x;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,2=
04,204);padding-left:1ex">
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You&#39;re less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
=C2=A0 Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
=C2=A0 Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
=C2=A0 Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
=C2=A0 Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br></b=
lockquote><div>GIM&gt;&gt; Thank you, will make the changes.=C2=A0</div><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-lef=
t-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padd=
ing-left:1ex">
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].<br></blockquote><div>GIM&gt;&gt=
; =C2=A0Will add the reference.</div></div><br></div></div>

--001a113d448c6d4df90545d5e091--


From nobody Thu Jan 12 09:08:37 2017
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From: Eric Gray <eric.gray@ericsson.com>
To: "mpls@ietf.org" <mpls@ietf.org>
Thread-Topic: Implementation poll for draft-ietf-mpls-tp-shared-ring-protection
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Cc: "draft-ietf-mpls-tp-shared-ring-protection@ietf.org" <draft-ietf-mpls-tp-shared-ring-protection@ietf.org>
Subject: [mpls] Implementation poll for draft-ietf-mpls-tp-shared-ring-protection
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Working Group,

I am currently preparing the Document Shepherd Write-Up for draft-ietf-mpls=
-tp-shared-ring-protection.=20

One question to answer in a Shepherd Write-Up is if we are aware of existin=
g implementations or intentions to implement the specification.

This E-Mail is to start that Implementation Poll for this draft.  The draft=
 may be found at:
    https://tools.ietf.org/html/draft-ietf-mpls-tp-shared-ring-protection-0=
4=20

If you have, or are aware of, an existing implementations of (or intentions=
 to implement) draft-ietf-mpls-tp-shared-ring-protection please send this i=
nformation to the working group mailing list or directly to me, copying the=
 working group chairs.

--
Eric Gray
Shepherd for draft-ietf-mpls-tp-shared-ring-protection


From nobody Thu Jan 12 11:13:17 2017
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Subject: [mpls] IPR Disclosure Huawei Technologies Co., Ltd 's Statement about IPR related to RFC 7307
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Dear Luyuan Fang, Quintin Zhao, Chao Zhou, Lianyuan Li, Kamran Raza, Daniel King:


An IPR disclosure that pertains to your RFC entitled "LDP Extensions for
Multi-Topology" (RFC7307) was submitted to the IETF Secretariat on  and has
been posted on the "IETF Page of Intellectual Property Rights Disclosures"
(https://datatracker.ietf.org/ipr/2928/). The title of the IPR disclosure is
"Huawei Technologies Co.,Ltd 's Statement about IPR related to RFC 7307"


Thank you

IETF Secretariat


From nobody Thu Jan 12 14:13:52 2017
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Subject: [mpls] Last Call: <draft-ietf-mpls-tp-linear-protection-mib-11.txt> (MPLS Transport Profile Linear Protection MIB) to Proposed Standard
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The IESG has received a request from the Multiprotocol Label Switching WG
(mpls) to consider the following document:
- 'MPLS Transport Profile Linear Protection MIB'
  <draft-ietf-mpls-tp-linear-protection-mib-11.txt> as Proposed Standard

The IESG plans to make a decision in the next few weeks, and solicits
final comments on this action. Please send substantive comments to the
ietf@ietf.org mailing lists by 2017-01-26. Exceptionally, comments may be
sent to iesg@ietf.org instead. In either case, please retain the
beginning of the Subject line to allow automated sorting.

Abstract


   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols.  In particular it defines
   objects for managing MPLS-Transport Profile (MPLS-TP) Linear
   Protection.




The file can be obtained via
https://datatracker.ietf.org/doc/draft-ietf-mpls-tp-linear-protection-mib/

IESG discussion can be tracked via
https://datatracker.ietf.org/doc/draft-ietf-mpls-tp-linear-protection-mib/ballot/


No IPR declarations have been submitted directly on this I-D.





From nobody Fri Jan 13 09:31:25 2017
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WG LC review

I have reviewed the -11 version of this document. It is well written and
clear to read. I particularly welcome the explanations of the various
objects.

Here are a very few minor points and some nits.

I think the document is ready to proceed to publication.

Thanks,
Adrian

===

Section 1 concludes with 

   Although the example
   described in Section 7 specify means to configure OAM identifiers for
   MPLS-TP tunnels, this should be seen as indicating how the MIB values
   would be returned in the specified circumstances having been
   configured by alternative means.

Two thoughts:

1. This text needs to be repeated in Section 7

2. This would read better as:

   Although the example
   described in Section 7 shows a way to configure OAM identifiers for
   MPLS-TP tunnels, this also indicates how the MIB values would be
   returned if they had been configured by alternative means.

---

Section 4.

The first sentence is a little hard to read...

   RFC 6378 [RFC6378] defines the protocol to provide a linear
   protection switching mechanism for MPLS-TP with protection domain as
   a point-to-point LSP.

Looking at section 1.1. of RFC 6378, I think you could write...

   RFC 6378 [RFC6378] defines the protocol to provide a linear
   protection switching mechanism for MPLS-TP for a point-to-point LSP
   within the protection domain bounded by the end points of the LSP.

---

Is Section 5.1 too terse? Maybe a two line explanation of each new TC?

---

Please have a quick check to see whether sometimes when you say "this
MIB" you mean "this MIB module" (etc., for other uses of "MIB").

For example the Description clause of mplsLpsNotificationEnable
         "Provides the ability to enable and disable notifications
          defined in this MIB.

---

It is a little odd that MplsLpsReq has a syntax of 
OCTET STRING (SIZE (2)), a display hint of "1d", and you list the
potential values in binary.

I should think that the values should be listed in decimal as they
are shown in RFC6378 and RFC7271.

Then it is just a question of whether this should be a text string or
an integer, which probably doesn't matter, but if your keep it as a 
octet string, you do need to say how the numbers are encoded (presumably
ASCII?).

---

For MplsLpsFpathPath why do you say...
  Bits are numbered from left to right.
...I don't see any reference to bits.

---

mplsLpsConfigSdBadSeconds and mplsLpsConfigSdGoodSeconds could use a
Units clause (although it should be pretty obvious from the name and
description!)

---

Is there a reason why you used 
      SYNTAX     INTEGER {true (1), false (2)}
instead of TruthValue in 
   mplsLpsStatusRevertiveMismatch
   mplsLpsStatusProtecTypeMismatch 
   mplsLpsStatusCapabilitiesMismatch
   mplsLpsStatusPathConfigMismatch OBJECT-TYPE

---

   mplsLpsStatusPathConfigMismatch OBJECT-TYPE
      SYNTAX     INTEGER {true (1), falsmplsOamIdMeMpIndexNexte (2)}

Looks like a typo although it will compile :-)



===

Nits
---
Section 1
s/read- write/read-write/
s/document is consistent/document are consistent/
---
Section 4
s/alternate/alternative/
---
Section 5.3
s/failures of linear protection/failures of the linear protection/
---
mplsLpsMeStatusTable
s/liear/linear/


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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Fri, 13 Jan 2017 10:11:57 -0800
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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--94eb2c18d080fc98c60545fdc44b
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Hi Jurgen,
thank you for the thorough review and the most detailed and helpful
comments.
We're preparing -13 version and will address your comments promptly. Please
find my responses in-lined and tagged GIM>>.

Regards,
Greg

On Fri, Jan 13, 2017 at 12:47 AM, <"J=C3=BCrgen Sch=C3=B6nw=C3=A4lder
<j.schoenwaelder@jac"@ietfa.amsl.com> wrote:

> Reviewer: J=C3=BCrgen Sch=C3=B6nw=C3=A4lder
> Review result: Has Nits
>
> I do not see any major OPS related issues. I am not an MPLS expert
> and
> this will likely show in my comments. Most of my comments below are
> editorial or trying to make the document easier to read for first
> time
> readers not deeply involved in the work.
>
> - Consider to avoid acronyms in the Abstract. I had to lookup what
>   G-ACh and PTP resolve to in order to read the abstract, which I
>   think should be avoided.
>
GIM>> Will use full versions in the Abstract.

>
> - The sentence starting 'I.e.' in parenthesis in the Introduction
>   almost reads like a definition of Residence Time. Is it useful to
>   have this sentence in parenthesis and starting with 'I.e.'? It
> would
>   be nice to have a clear definition of Residence Time. In fact, my
>   reading is that residence time sometimes refers to the per hop
>   residence them and sometimes to the accumulated per path residence
>   time. Does it make sense to distinguish a Node Residence Time from
> a
>   Path Residence Time? Or a Residence Time from an Accumulated
>   Residence Time?
>
GIM>> Perhaps if parenthesis removed and the sentence starts with
"Residence Time can be calculated as the sum ..."

>
> - While reading section 3, I was wondering what are 1-step nodes and
>   what are 2-step nodes? This is later explained in detail inq
> section
>   7. Perhaps it makes sense to introduce the concept earlier and to
>   provide a forward pointer to section 7 for the details.
>
GIM>> Will try to re-arrange the text to make the flow more logical.

>
> - I suggest to either always write one-step and two-step or 1-step
> and
>   2-step. Mixing writing styles makes searching in the text a bit
> more
>   complicated.
>
GIM>> Will pick and use one form throughout the document.

>
> - The document seems to be PTP specific even though there are
>   provisions to support other time synchronization protocols. I
>   wonder, though, to what extend this would work for lets say NTP.
>   There is quite some text refering to the correctionField, which
>   seems to be a PTP-specific field.
>
GIM>> Yes, NTP doesn't use residence time and thus no need for
correctionField. We assume that there may be interest in using RT by NTP at
some time.

>
> - s/Scratch Pad filed/Scratch Pad field/
>
GIM>> Great catch, thank you!

>
> - Does the Interface ID related to other interface numbers, e.g.,
>   SNMP's ifIndex? Or is this an entirely separate number space? Or
>   does it depend on the implementor's choice?
>
GIM>> This comes from PTP. AFAIK, it is different from SNMP index.

>
> - In section 7, enumerated item 1, there is a hanging open
> parenthesis
>   which seem to have to sub-items inside. I suggest to change this by
>   s/forthcoming (this/forthcoming. This/
>
GIM>> Accepted, thank you.

>
> - In section 8.3: s/.  .  /.  /
>
GIM>> Done

>
> - It may be useful to add instructions that the RFC editor is
> expected
>   to replace TBAx in the text once IANA has done the assignments.
>
> - What does 'particularly as applied to use related to PTP' mean?
>
GIM>> My interpretation would be "when used to measure the residence time
on behalf of PTP"

--94eb2c18d080fc98c60545fdc44b
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<div dir=3D"ltr">Hi Jurgen,<div>thank you for the thorough review and the m=
ost detailed and helpful comments.</div><div>We&#39;re preparing -13 versio=
n and will address your comments promptly. Please find my responses in-line=
d and tagged GIM&gt;&gt;.</div><div><br></div><div>Regards,</div><div>Greg<=
/div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Fri, Jan =
13, 2017 at 12:47 AM,  <span dir=3D"ltr">&lt;<a href=3D"mailto:%22J=C3=BCrg=
en+Sch=C3=B6nw=C3=A4lder+%3Cj.schoenwaelder@jac%22@ietfa.amsl.com" target=
=3D"_blank">&quot;J=C3=BCrgen Sch=C3=B6nw=C3=A4lder &lt;j.schoenwaelder@jac=
&quot;@ietfa.am<wbr>sl.com</a>&gt;</span> wrote:<br><blockquote class=3D"gm=
ail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-le=
ft:1ex">Reviewer: J=C3=BCrgen Sch=C3=B6nw=C3=A4lder<br>
Review result: Has Nits<br>
<br>
I do not see any major OPS related issues. I am not an MPLS expert<br>
and<br>
this will likely show in my comments. Most of my comments below are<br>
editorial or trying to make the document easier to read for first<br>
time<br>
readers not deeply involved in the work.<br>
<br>
- Consider to avoid acronyms in the Abstract. I had to lookup what<br>
=C2=A0 G-ACh and PTP resolve to in order to read the abstract, which I<br>
=C2=A0 think should be avoided.<br></blockquote><div>GIM&gt;&gt; Will use f=
ull versions in the Abstract.=C2=A0</div><blockquote class=3D"gmail_quote" =
style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
- The sentence starting &#39;I.e.&#39; in parenthesis in the Introduction<b=
r>
=C2=A0 almost reads like a definition of Residence Time. Is it useful to<br=
>
=C2=A0 have this sentence in parenthesis and starting with &#39;I.e.&#39;? =
It<br>
would<br>
=C2=A0 be nice to have a clear definition of Residence Time. In fact, my<br=
>
=C2=A0 reading is that residence time sometimes refers to the per hop<br>
=C2=A0 residence them and sometimes to the accumulated per path residence<b=
r>
=C2=A0 time. Does it make sense to distinguish a Node Residence Time from<b=
r>
a<br>
=C2=A0 Path Residence Time? Or a Residence Time from an Accumulated<br>
=C2=A0 Residence Time?<br></blockquote><div>GIM&gt;&gt; Perhaps if parenthe=
sis removed and the sentence starts with &quot;Residence Time can be calcul=
ated as the sum ...&quot;=C2=A0</div><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
- While reading section 3, I was wondering what are 1-step nodes and<br>
=C2=A0 what are 2-step nodes? This is later explained in detail inq<br>
section<br>
=C2=A0 7. Perhaps it makes sense to introduce the concept earlier and to<br=
>
=C2=A0 provide a forward pointer to section 7 for the details.<br></blockqu=
ote><div>GIM&gt;&gt; Will try to re-arrange the text to make the flow more =
logical.=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0=
 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
- I suggest to either always write one-step and two-step or 1-step<br>
and<br>
=C2=A0 2-step. Mixing writing styles makes searching in the text a bit<br>
more<br>
=C2=A0 complicated.<br></blockquote><div>GIM&gt;&gt; Will pick and use one =
form throughout the document.=C2=A0</div><blockquote class=3D"gmail_quote" =
style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
- The document seems to be PTP specific even though there are<br>
=C2=A0 provisions to support other time synchronization protocols. I<br>
=C2=A0 wonder, though, to what extend this would work for lets say NTP.<br>
=C2=A0 There is quite some text refering to the correctionField, which<br>
=C2=A0 seems to be a PTP-specific field.<br></blockquote><div>GIM&gt;&gt; Y=
es, NTP doesn&#39;t use residence time and thus no need for correctionField=
. We assume that there may be interest in using RT by NTP at some time.=C2=
=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;borde=
r-left:1px #ccc solid;padding-left:1ex">
<br>
- s/Scratch Pad filed/Scratch Pad field/<br></blockquote><div>GIM&gt;&gt; G=
reat catch, thank you!=C2=A0</div><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
- Does the Interface ID related to other interface numbers, e.g.,<br>
=C2=A0 SNMP&#39;s ifIndex? Or is this an entirely separate number space? Or=
<br>
=C2=A0 does it depend on the implementor&#39;s choice?<br></blockquote><div=
>GIM&gt;&gt; This comes from PTP. AFAIK, it is different from SNMP index.=
=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bo=
rder-left:1px #ccc solid;padding-left:1ex">
<br>
- In section 7, enumerated item 1, there is a hanging open<br>
parenthesis<br>
=C2=A0 which seem to have to sub-items inside. I suggest to change this by<=
br>
=C2=A0 s/forthcoming (this/forthcoming. This/<br></blockquote><div>GIM&gt;&=
gt; Accepted, thank you.=C2=A0</div><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
- In section 8.3: s/.=C2=A0 .=C2=A0 /.=C2=A0 /<br></blockquote><div>GIM&gt;=
&gt; Done=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 =
0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
- It may be useful to add instructions that the RFC editor is<br>
expected<br>
=C2=A0 to replace TBAx in the text once IANA has done the assignments.<br>
<br>
- What does &#39;particularly as applied to use related to PTP&#39; mean?<b=
r></blockquote><div>GIM&gt;&gt; My interpretation would be &quot;when used =
to measure the residence time on behalf of PTP&quot;=C2=A0</div></div><br><=
/div></div>

--94eb2c18d080fc98c60545fdc44b--


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From: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
To: Greg Mirsky <gregimirsky@gmail.com>
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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On Fri, Jan 13, 2017 at 10:11:57AM -0800, Greg Mirsky wrote:
> >
> > - Does the Interface ID related to other interface numbers, e.g.,
> >   SNMP's ifIndex? Or is this an entirely separate number space? Or
> >   does it depend on the implementor's choice?
> >
> GIM>> This comes from PTP. AFAIK, it is different from SNMP index.
> 

If this is specifically a PTP Interface ID, it might be desirable to
be explicit about this and that it may be different from other numeric
interface IDs. (This is what I heard you saying, I do not know much
about PTP and surely not any details how PTP defines Interface IDs.

/js

PS: This was actually the only operational comment I had. From an
    operational perspective, it is important to know whether interface
    numbers us a common or possibly different numbering scheme.

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
Fax:   +49 421 200 3103         <http://www.jacobs-university.de/>


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Cc: mpls@ietf.org, draft-ietf-mpls-tp-linear-protection-mib@ietf.org
Subject: [mpls] Last call review of draft-ietf-mpls-tp-linear-protection-mib
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> The IESG has received a request from the Multiprotocol Label Switching WG
> (mpls) to consider the following document:
> - 'MPLS Transport Profile Linear Protection MIB'
>  <draft-ietf-mpls-tp-linear-protection-mib-11.txt> as Proposed Standard
>
> The IESG plans to make a decision in the next few weeks, and solicits
> final comments on this action. Please send substantive comments to the
> ietf@ietf.org mailing lists by 2017-01-26. Exceptionally, comments may be
> sent to iesg@ietf.org instead. In either case, please retain the
> beginning of the Subject line to allow automated sorting.

I have reviewed the -11 version of this document. It is well written and
clear to read. I particularly welcome the explanations of the various
objects.

Here are a very few minor points and some nits.

I think the document is ready to proceed to publication.

Thanks,
Adrian

===

Section 1 concludes with

   Although the example
   described in Section 7 specify means to configure OAM identifiers for
   MPLS-TP tunnels, this should be seen as indicating how the MIB values
   would be returned in the specified circumstances having been
   configured by alternative means.

Two thoughts:

1. This text needs to be repeated in Section 7

2. This would read better as:
 
   Although the example
   described in Section 7 shows a way to configure OAM identifiers for
   MPLS-TP tunnels, this also indicates how the MIB values would be
   returned if they had been configured by alternative means.
 
---

Section 4.

The first sentence is a little hard to read...

   RFC 6378 [RFC6378] defines the protocol to provide a linear
   protection switching mechanism for MPLS-TP with protection domain as
   a point-to-point LSP.

Looking at section 1.1. of RFC 6378, I think you could write...

   RFC 6378 [RFC6378] defines the protocol to provide a linear
   protection switching mechanism for MPLS-TP for a point-to-point LSP
   within the protection domain bounded by the end points of the LSP.

---

Is Section 5.1 too terse? Maybe a two line explanation of each new TC?

---

Please have a quick check to see whether sometimes when you say "this
MIB" you mean "this MIB module" (etc., for other uses of "MIB").

For example the Description clause of mplsLpsNotificationEnable
         "Provides the ability to enable and disable notifications
          defined in this MIB.

---

It is a little odd that MplsLpsReq has a syntax of
OCTET STRING (SIZE (2)), a display hint of "1d", and you list the
potential values in binary.

I should think that the values should be listed in decimal as they
are shown in RFC6378 and RFC7271.

Then it is just a question of whether this should be a text string or
an integer, which probably doesn't matter, but if your keep it as a
octet string, you do need to say how the numbers are encoded (presumably
ASCII?).

---

For MplsLpsFpathPath why do you say...
  Bits are numbered from left to right.
...I don't see any reference to bits.

---

mplsLpsConfigSdBadSeconds and mplsLpsConfigSdGoodSeconds could use a
Units clause (although it should be pretty obvious from the name and
description!)

---

Is there a reason why you used
      SYNTAX     INTEGER {true (1), false (2)}
instead of TruthValue in
   mplsLpsStatusRevertiveMismatch
   mplsLpsStatusProtecTypeMismatch
   mplsLpsStatusCapabilitiesMismatch
   mplsLpsStatusPathConfigMismatch OBJECT-TYPE

---

   mplsLpsStatusPathConfigMismatch OBJECT-TYPE
      SYNTAX     INTEGER {true (1), falsmplsOamIdMeMpIndexNexte (2)}

Looks like a typo although it will compile :-)

===

Nits
---
Section 1
s/read- write/read-write/
s/document is consistent/document are consistent/
---
Section 4
s/alternate/alternative/
---
Section 5.3
s/failures of linear protection/failures of the linear protection/
---
mplsLpsMeStatusTable
s/liear/linear/


From nobody Sun Jan 15 14:04:11 2017
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Reviewer: Brian Carpenter
Review result: Ready with Issues

Gen-ART Last Call review of
draft-ietf-mpls-tp-linear-protection-mib-11

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<http://wiki.tools.ietf.org/area/gen/trac/wiki/GenArtfaq>.

Document: draft-ietf-mpls-tp-linear-protection-mib-11.txt
Reviewer: Brian Carpenter
Review Date: 2017-01-16
IETF LC End Date: 2017-01-26
IESG Telechat date:  

Summary: Ready with minor issues
--------

Comment:
--------

I have not reviewed most details of the MIB module itself. As usual,
I trust the MIB Doctors.

"We know of a handful of implementations (or intent to implement)."
Good. It would have been nice to see an Implementation Status section
under RFC 6982.

Minor issues:
-------------

   At the time of writing, Simple Network Management Protocol (SNMP)
SET
   is no longer recommended as a way to configure MPLS networks as
was
   described in RFC 3812 [RFC3812].

RFC3812 is explicit that it should be used for configuration:

   This MIB module should be used in conjunction with the
   companion document [RFC3813] for MPLS based traffic engineering
   configuration and management.

RFC3812 has not been formally updated or obsoleted. Therefore, it
seems
to me that the present draft should formally update RFC3812 in this
respect.

Does the same issue apply to RFC3813, whose Abstract also states that
it is used to configure an LSR?


From nobody Sun Jan 15 22:48:45 2017
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From: Loa Andersson <loa@pi.nu>
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Brian, et.al.,

We could of course update 3812 (and 3813), though this would probably 
lead to another discussion on what updates means.

What is refereed to is that there is now another preferred method for
configuration - netconf/yang. In fact this draft doe not change 3812 or
propose a change, so there can not be an update. The document is just
noting that there is a change in the environment, and that for the time
being it will use RFC 3812 as specified.

Maybe Benoit have a take on this?

/Loa

On 2017-01-16 06:04, Brian Carpenter wrote:
> Reviewer: Brian Carpenter
> Review result: Ready with Issues
>
> Gen-ART Last Call review of
> draft-ietf-mpls-tp-linear-protection-mib-11
>
> I am the assigned Gen-ART reviewer for this draft. The General Area
> Review Team (Gen-ART) reviews all IETF documents being processed
> by the IESG for the IETF Chair.  Please treat these comments just
> like any other last call comments.
>
> For more information, please see the FAQ at
> <http://wiki.tools.ietf.org/area/gen/trac/wiki/GenArtfaq>.
>
> Document: draft-ietf-mpls-tp-linear-protection-mib-11.txt
> Reviewer: Brian Carpenter
> Review Date: 2017-01-16
> IETF LC End Date: 2017-01-26
> IESG Telechat date:
>
> Summary: Ready with minor issues
> --------
>
> Comment:
> --------
>
> I have not reviewed most details of the MIB module itself. As usual,
> I trust the MIB Doctors.
>
> "We know of a handful of implementations (or intent to implement)."
> Good. It would have been nice to see an Implementation Status section
> under RFC 6982.
>
> Minor issues:
> -------------
>
>    At the time of writing, Simple Network Management Protocol (SNMP)
> SET
>    is no longer recommended as a way to configure MPLS networks as
> was
>    described in RFC 3812 [RFC3812].
>
> RFC3812 is explicit that it should be used for configuration:
>
>    This MIB module should be used in conjunction with the
>    companion document [RFC3813] for MPLS based traffic engineering
>    configuration and management.
>
> RFC3812 has not been formally updated or obsoleted. Therefore, it
> seems
> to me that the present draft should formally update RFC3812 in this
> respect.
>
> Does the same issue apply to RFC3813, whose Abstract also states that
> it is used to configure an LSR?
>

-- 


Loa Andersson                        email: loa@mail01.huawei.com
Senior MPLS Expert                          loa@pi.nu
Huawei Technologies (consultant)     phone: +46 739 81 21 64


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To: Loa Andersson <loa@pi.nu>, Brian Carpenter <brian.e.carpenter@gmail.com>,  gen-art@ietf.org
References: <148451784736.3226.15889507299394185360.idtracker@ietfa.amsl.com> <a35bfb84-091b-a408-9a53-0b6dbd5cd003@pi.nu>
From: Benoit Claise <bclaise@cisco.com>
Message-ID: <54feb39c-0e5b-9c12-0ae2-d5757316c9c3@cisco.com>
Date: Mon, 16 Jan 2017 08:34:41 +0100
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Subject: Re: [mpls] Review of draft-ietf-mpls-tp-linear-protection-mib-11
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Loa, Brian,
> Brian, et.al.,
>
> We could of course update 3812 (and 3813), though this would probably 
> lead to another discussion on what updates means.
>
> What is refereed to is that there is now another preferred method for
> configuration - netconf/yang. In fact this draft doe not change 3812 or
> propose a change, so there can not be an update. The document is just
> noting that there is a change in the environment, and that for the time
> being it will use RFC 3812 as specified.
>
> Maybe Benoit have a take on this?
No strong views on updating RFC 3812, but the text in the intro section 
and the read-only conformance statement (WriteUp mentions: The MIB 
module has a read-only conformance statement so that vendors and/or 
network operators can choose to implement/operate the MIB module as 
read-only.) do the job IMO.

Regards, Benoit
>
> /Loa
>
> On 2017-01-16 06:04, Brian Carpenter wrote:
>> Reviewer: Brian Carpenter
>> Review result: Ready with Issues
>>
>> Gen-ART Last Call review of
>> draft-ietf-mpls-tp-linear-protection-mib-11
>>
>> I am the assigned Gen-ART reviewer for this draft. The General Area
>> Review Team (Gen-ART) reviews all IETF documents being processed
>> by the IESG for the IETF Chair.  Please treat these comments just
>> like any other last call comments.
>>
>> For more information, please see the FAQ at
>> <http://wiki.tools.ietf.org/area/gen/trac/wiki/GenArtfaq>.
>>
>> Document: draft-ietf-mpls-tp-linear-protection-mib-11.txt
>> Reviewer: Brian Carpenter
>> Review Date: 2017-01-16
>> IETF LC End Date: 2017-01-26
>> IESG Telechat date:
>>
>> Summary: Ready with minor issues
>> --------
>>
>> Comment:
>> --------
>>
>> I have not reviewed most details of the MIB module itself. As usual,
>> I trust the MIB Doctors.
>>
>> "We know of a handful of implementations (or intent to implement)."
>> Good. It would have been nice to see an Implementation Status section
>> under RFC 6982.
>>
>> Minor issues:
>> -------------
>>
>>    At the time of writing, Simple Network Management Protocol (SNMP)
>> SET
>>    is no longer recommended as a way to configure MPLS networks as
>> was
>>    described in RFC 3812 [RFC3812].
>>
>> RFC3812 is explicit that it should be used for configuration:
>>
>>    This MIB module should be used in conjunction with the
>>    companion document [RFC3813] for MPLS based traffic engineering
>>    configuration and management.
>>
>> RFC3812 has not been formally updated or obsoleted. Therefore, it
>> seems
>> to me that the present draft should formally update RFC3812 in this
>> respect.
>>
>> Does the same issue apply to RFC3813, whose Abstract also states that
>> it is used to configure an LSR?
>>
>


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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Mon, 16 Jan 2017 10:01:26 -0800
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To: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>,  Greg Mirsky <gregimirsky@gmail.com>, ops-dir@ietf.org, "mpls@ietf.org" <mpls@ietf.org>,  draft-ietf-mpls-residence-time.all@ietf.org, "ietf@ietf.org" <ietf@ietf.org>
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Hi Jurgen,
I apologize for confusion, been thinking of Port ID. Indeed, the Interface
ID is local ID and used in case of unnumbered interface as described in
section 4.7.1.3:

   Interface ID
      The identifier assigned to the link by the node specified by the Node ID.

Thus it MAY be SNMP' IfIndex , as you've pointed out. The document
leaves it to the implementation.


Regards,

Greg



On Fri, Jan 13, 2017 at 11:55 AM, Juergen Schoenwaelder <
j.schoenwaelder@jacobs-university.de> wrote:

> On Fri, Jan 13, 2017 at 10:11:57AM -0800, Greg Mirsky wrote:
> > >
> > > - Does the Interface ID related to other interface numbers, e.g.,
> > >   SNMP's ifIndex? Or is this an entirely separate number space? Or
> > >   does it depend on the implementor's choice?
> > >
> > GIM>> This comes from PTP. AFAIK, it is different from SNMP index.
> >
>
> If this is specifically a PTP Interface ID, it might be desirable to
> be explicit about this and that it may be different from other numeric
> interface IDs. (This is what I heard you saying, I do not know much
> about PTP and surely not any details how PTP defines Interface IDs.
>
> /js
>
> PS: This was actually the only operational comment I had. From an
>     operational perspective, it is important to know whether interface
>     numbers us a common or possibly different numbering scheme.
>
> --
> Juergen Schoenwaelder           Jacobs University Bremen gGmbH
> Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
> Fax:   +49 421 200 3103         <http://www.jacobs-university.de/>
>

--001a113ce9bcf0474c054639f8f7
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Jurgen,<div>I apologize for confusion, been thinking of=
 Port ID. Indeed, the Interface ID is local ID and used in case of unnumber=
ed interface as described in section <a href=3D"http://4.7.1.3">4.7.1.3</a>=
:</div><div><pre class=3D"gmail-newpage" style=3D"font-size:13.3333px;margi=
n-top:0px;margin-bottom:0px;color:rgb(0,0,0)">   Interface ID
      The identifier assigned to the link by the node specified by the Node=
 ID.
</pre><pre class=3D"gmail-newpage" style=3D"font-size:13.3333px;margin-top:=
0px;margin-bottom:0px;color:rgb(0,0,0)">Thus it MAY be SNMP&#39; IfIndex , =
as you&#39;ve pointed out. The document leaves it to the implementation.</p=
re><pre class=3D"gmail-newpage" style=3D"font-size:13.3333px;margin-top:0px=
;margin-bottom:0px;color:rgb(0,0,0)"><br></pre><pre class=3D"gmail-newpage"=
 style=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0px;color:rgb(0,=
0,0)">Regards,</pre><pre class=3D"gmail-newpage" style=3D"font-size:13.3333=
px;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0)">Greg</pre></div><div>=
<br></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">O=
n Fri, Jan 13, 2017 at 11:55 AM, Juergen Schoenwaelder <span dir=3D"ltr">&l=
t;<a href=3D"mailto:j.schoenwaelder@jacobs-university.de" target=3D"_blank"=
>j.schoenwaelder@jacobs-university.de</a>&gt;</span> wrote:<br><blockquote =
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid=
;padding-left:1ex"><span class=3D"">On Fri, Jan 13, 2017 at 10:11:57AM -080=
0, Greg Mirsky wrote:<br>
&gt; &gt;<br>
&gt; &gt; - Does the Interface ID related to other interface numbers, e.g.,=
<br>
&gt; &gt;=C2=A0 =C2=A0SNMP&#39;s ifIndex? Or is this an entirely separate n=
umber space? Or<br>
&gt; &gt;=C2=A0 =C2=A0does it depend on the implementor&#39;s choice?<br>
&gt; &gt;<br>
&gt; GIM&gt;&gt; This comes from PTP. AFAIK, it is different from SNMP inde=
x.<br>
&gt;<br>
<br>
</span>If this is specifically a PTP Interface ID, it might be desirable to=
<br>
be explicit about this and that it may be different from other numeric<br>
interface IDs. (This is what I heard you saying, I do not know much<br>
about PTP and surely not any details how PTP defines Interface IDs.<br>
<br>
/js<br>
<br>
PS: This was actually the only operational comment I had. From an<br>
=C2=A0 =C2=A0 operational perspective, it is important to know whether inte=
rface<br>
=C2=A0 =C2=A0 numbers us a common or possibly different numbering scheme.<b=
r>
<span class=3D"HOEnZb"><font color=3D"#888888"><br>
--<br>
Juergen Schoenwaelder=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Jacobs Univer=
sity Bremen gGmbH<br>
Phone: <a href=3D"tel:%2B49%20421%20200%203587" value=3D"+494212003587">+49=
 421 200 3587</a>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Campus Ring 1 | 28759 Br=
emen | Germany<br>
Fax:=C2=A0 =C2=A0<a href=3D"tel:%2B49%20421%20200%203103" value=3D"+4942120=
03103">+49 421 200 3103</a>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0&lt;<a href=3D=
"http://www.jacobs-university.de/" rel=3D"noreferrer" target=3D"_blank">htt=
p://www.jacobs-university.<wbr>de/</a>&gt;<br>
</font></span></blockquote></div><br></div>

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From: "Adrian Farrel" <adrian@olddog.co.uk>
To: "'Ryoo, Jeong-dong '" <ryoo@etri.re.kr>, <ietf@ietf.org>
References: <004201d26e88$c37e07f0$4a7a17d0$@olddog.co.uk> <5B4A6CBE3924BB41A3BEE462A8E0B75A29294F21@SMTP2.etri.info>
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Date: Mon, 16 Jan 2017 18:18:49 -0000
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Cc: mpls@ietf.org, draft-ietf-mpls-tp-linear-protection-mib@ietf.org
Subject: Re: [mpls] Last call review of draft-ietf-mpls-tp-linear-protection-mib
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Hi Jeong-dong.
=20
Perfect answers.
=20
Thank you.
Adrian
=20
From: Ryoo, Jeong-dong [mailto:ryoo@etri.re.kr]=20
Sent: 16 January 2017 09:44
To: adrian@olddog.co.uk; ietf@ietf.org
Cc: draft-ietf-mpls-tp-linear-protection-mib@ietf.org; mpls@ietf.org
Subject: RE: Last call review of =
draft-ietf-mpls-tp-linear-protection-mib
=20
=20
=20
Adrian, thank you so much for the detailed review.
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=20
=20
Please, see my response (starting with [JR]) to your comments below.
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Best regards,
=20
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Jeong-dong
=20
=20
=20
  _____ =20

=EB=B3=B4=EB=82=B8 =EC=82=AC=EB=9E=8C : "Adrian Farrel" =
<adrian@olddog.co.uk>
=EB=B3=B4=EB=82=B8 =EB=82=A0=EC=A7=9C : 2017-01-15 02:08:15 ( +09:00 )
=EB=B0=9B=EB=8A=94 =EC=82=AC=EB=9E=8C : ietf@ietf.org <ietf@ietf.org>
=EC=B0=B8=EC=A1=B0 : draft-ietf-mpls-tp-linear-protection-mib@ietf.org =
<draft-ietf-mpls-tp-linear-protection-mib@ietf.org>, mpls@ietf.org =
<mpls@ietf.org>
=EC=A0=9C=EB=AA=A9 : Last call review of =
draft-ietf-mpls-tp-linear-protection-mib
=20
> The IESG has received a request from the Multiprotocol Label Switching =
WG=20
=20
> (mpls) to consider the following document:=20
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> - 'MPLS Transport Profile Linear Protection MIB'=20
=20
> as Proposed Standard=20
=20
>=20
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> The IESG plans to make a decision in the next few weeks, and solicits=20
=20
> final comments on this action. Please send substantive comments to the =

=20
> ietf@ietf.org mailing lists by 2017-01-26. Exceptionally, comments may =
be=20
=20
> sent to iesg@ietf.org instead. In either case, please retain the=20
=20
> beginning of the Subject line to allow automated sorting.=20
=20
=20
I have reviewed the -11 version of this document. It is well written and =

=20
clear to read. I particularly welcome the explanations of the various=20
=20
objects.=20
=20
=20
Here are a very few minor points and some nits.=20
=20
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I think the document is ready to proceed to publication.=20
=20
=20
Thanks,=20
=20
Adrian=20
=20
=20
=3D=3D=3D=20
=20
=20
Section 1 concludes with=20
=20
=20
Although the example=20
=20
described in Section 7 specify means to configure OAM identifiers for=20
=20
MPLS-TP tunnels, this should be seen as indicating how the MIB values=20
=20
would be returned in the specified circumstances having been=20
=20
configured by alternative means.=20
=20
=20
Two thoughts:=20
=20
=20
1. This text needs to be repeated in Section 7=20
=20
=20
2. This would read better as:=20
=20
=20
Although the example=20
=20
described in Section 7 shows a way to configure OAM identifiers for=20
=20
MPLS-TP tunnels, this also indicates how the MIB values would be=20
=20
returned if they had been configured by alternative means.=20
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[JR] OK, those two points will be reflected to the revision.=20
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---=20
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Section 4.=20
=20
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The first sentence is a little hard to read...=20
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RFC 6378 [RFC6378] defines the protocol to provide a linear=20
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protection switching mechanism for MPLS-TP with protection domain as=20
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a point-to-point LSP.=20
=20
=20
Looking at section 1.1. of RFC 6378, I think you could write...=20
=20
=20
RFC 6378 [RFC6378] defines the protocol to provide a linear=20
=20
protection switching mechanism for MPLS-TP for a point-to-point LSP=20
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within the protection domain bounded by the end points of the LSP.=20
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[JR] OK.
=20
=20
---=20
=20
=20
Is Section 5.1 too terse? Maybe a two line explanation of each new TC?=20
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[JR] Would the following text be ok?
=20
The following new textual conventions are defined in this document:
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o MplsLpsReq: This Textual Convention describes an object that=20
=20
stores the PSC Request field of the PSC control packet.
=20
=20
=20
o MplsLpsFpathPath: This Textual Convention describes an object=20
=20
that stores the Fault Path (FPath) field and Data Path (Path)=20
=20
field of the PSC control packet.
=20
=20
=20
o MplsLpsCommand: This Textual Convention describes an object that=20
=20
allows a user to perform any action over a protection domain.
=20
=20
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o MplsLpsState: This Textual Convention describes an object that=20
=20
stores the current state of the PSC state machine.
=20
=20
=20
---=20
=20
=20
Please have a quick check to see whether sometimes when you say "this=20
=20
MIB" you mean "this MIB module" (etc., for other uses of "MIB").=20
=20
=20
For example the Description clause of mplsLpsNotificationEnable=20
=20
"Provides the ability to enable and disable notifications=20
=20
defined in this MIB.=20
=20
[JR] I checked the whole document, and that was the only place to add =
the word, =E2=80=9Cmodule=E2=80=9D.
=20
=20
---=20
=20
=20
It is a little odd that MplsLpsReq has a syntax of=20
=20
OCTET STRING (SIZE (2)), a display hint of "1d", and you list the=20
=20
potential values in binary.=20
=20
=20
I should think that the values should be listed in decimal as they=20
=20
are shown in RFC6378 and RFC7271.=20
=20
=20
Then it is just a question of whether this should be a text string or=20
=20
an integer, which probably doesn't matter, but if your keep it as a=20
=20
octet string, you do need to say how the numbers are encoded (presumably =

=20
ASCII?).=20
=20
[JR] I will change it to an integer.=20
=20
---=20
=20
=20
For MplsLpsFpathPath why do you say...=20
=20
Bits are numbered from left to right.=20
=20
...I don't see any reference to bits.=20
=20
=20
[JR] The notion of left/right was intended to indicate that FPath (the =
first octet, which is in left) is followed by Path (the second octet, =
which is in right). But, you are right and there is no reference to =
bits.
=20
Would it be ok to remove the sentence, =E2=80=9CBits are numbered from =
left to right.=E2=80=9D ?
=20
=20
=20
=20
---=20
=20
=20
mplsLpsConfigSdBadSeconds and mplsLpsConfigSdGoodSeconds could use a=20
=20
Units clause (although it should be pretty obvious from the name and=20
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description!)=20
=20
=20
[JR] UNITS =E2=80=9Cseconds=E2=80=9D will be added.
=20
=20
---=20
=20
=20
Is there a reason why you used=20
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SYNTAX INTEGER {true (1), false (2)}=20
=20
instead of TruthValue in=20
=20
mplsLpsStatusRevertiveMismatch=20
=20
mplsLpsStatusProtecTypeMismatch=20
=20
mplsLpsStatusCapabilitiesMismatch=20
=20
mplsLpsStatusPathConfigMismatch OBJECT-TYPE=20
=20
=20
[JR] No reason. TruthValue will be used in the revision.
=20
=20
---=20
=20
=20
mplsLpsStatusPathConfigMismatch OBJECT-TYPE=20
=20
SYNTAX INTEGER {true (1), falsmplsOamIdMeMpIndexNexte (2)}=20
=20
=20
Looks like a typo although it will compile :-)=20
=20
=20
[JR] Once TruthValue is in place, this mistake will go away.
=20
=20
=20
=3D=3D=3D=20
=20
=20
Nits=20
=20
---=20
=20
Section 1=20
=20
s/read- write/read-write/=20
=20
s/document is consistent/document are consistent/=20
=20
---=20
=20
Section 4=20
=20
s/alternate/alternative/=20
=20
---=20
=20
Section 5.3=20
=20
s/failures of linear protection/failures of the linear protection/=20
=20
---=20
=20
mplsLpsMeStatusTable=20
=20
s/liear/linear/=20
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[JR] All the nits will be fixed. Thank you.
=20
=20

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<o:shapelayout v:ext=3D"edit">
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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-GB link=3Dblue =
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class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>Hi =
Jeong-dong.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>Perfect =
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style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
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class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>Thank =
you.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>Adrian<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
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Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><div =
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4.0pt'><div><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal><b><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-f=
ont-family:"Times New =
Roman";mso-ansi-language:EN-US'>From:</span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-f=
ont-family:"Times New Roman";mso-ansi-language:EN-US'> Ryoo, Jeong-dong =
[mailto:ryoo@etri.re.kr] <br><b>Sent:</b> 16 January 2017 =
09:44<br><b>To:</b> adrian@olddog.co.uk; ietf@ietf.org<br><b>Cc:</b> =
draft-ietf-mpls-tp-linear-protection-mib@ietf.org; =
mpls@ietf.org<br><b>Subject:</b> RE: Last call review of =
draft-ietf-mpls-tp-linear-protection-mib<o:p></o:p></span></p></div></div=
><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><div =
id=3D"ezFormProc_div"><div id=3Dmsgbody><div><div><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN-US'>Adrian, thank you so much =
for the detailed review.</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN-US'>&nbsp;</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN-US'>Please, see my response =
</span><span lang=3DEN-US =
style=3D'font-size:10.0pt;mso-bidi-font-size:11.0pt;font-family:"Calibri"=
,"sans-serif";mso-fareast-font-family:"Times New =
Roman";mso-bidi-font-family:"Times New =
Roman";mso-ansi-language:EN-US;mso-fareast-language:KO'>(starting with =
[JR])&nbsp;</span><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN-US'>to your comments =
below.</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN-US'>&nbsp;</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN-US'>Best regards,</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN-US'>&nbsp;</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN-US'>Jeong-dong</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><div id=3DMailSignSent><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p></div><div id=3D"ORGMAIL_CONTENT"><div class=3DMsoNormal =
align=3Dcenter style=3D'text-align:center;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><hr size=3D2 =
width=3D"100%" align=3Dcenter></span></div><div><p class=3DMsoNormal =
style=3D'line-height:15.0pt'><b><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>=EB=B3=B4=EB=82=
=B8 =EC=82=AC=EB=9E=8C : </span></b><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&quot;Adrian =
Farrel&quot; =
&lt;adrian@olddog.co.uk&gt;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal style=3D'line-height:15.0pt'><b><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>=EB=B3=B4=EB=82=
=B8 =EB=82=A0=EC=A7=9C : </span></b><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>2017-01-15 =
02:08:15 ( +09:00 )<o:p></o:p></span></p></div><div><p class=3DMsoNormal =
style=3D'line-height:15.0pt'><b><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>=EB=B0=9B=EB=8A=
=94 =EC=82=AC=EB=9E=8C : </span></b><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>ietf@ietf.org=
 &lt;ietf@ietf.org&gt;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal style=3D'line-height:15.0pt'><b><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>=EC=B0=B8=EC=A1=
=B0 : </span></b><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>draft-ietf-mp=
ls-tp-linear-protection-mib@ietf.org =
&lt;draft-ietf-mpls-tp-linear-protection-mib@ietf.org&gt;, mpls@ietf.org =
&lt;mpls@ietf.org&gt;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal style=3D'line-height:15.0pt'><b><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>=EC=A0=9C=EB=AA=
=A9 : </span></b><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Last call =
review of =
draft-ietf-mpls-tp-linear-protection-mib<o:p></o:p></span></p></div><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&gt; The =
IESG has received a request from the Multiprotocol Label Switching WG =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&gt; (mpls) =
to consider the following document: <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&gt; - 'MPLS =
Transport Profile Linear Protection MIB' <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&gt; as =
Proposed Standard <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&gt; =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&gt; The =
IESG plans to make a decision in the next few weeks, and solicits =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&gt; final =
comments on this action. Please send substantive comments to the =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&gt; =
ietf@ietf.org mailing lists by 2017-01-26. Exceptionally, comments may =
be <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&gt; sent to =
iesg@ietf.org instead. In either case, please retain the =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&gt; =
beginning of the Subject line to allow automated sorting. =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>I have =
reviewed the -11 version of this document. It is well written and =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>clear to =
read. I particularly welcome the explanations of the various =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>objects. =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Here are a =
very few minor points and some nits. <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>I think the =
document is ready to proceed to publication. <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Thanks, =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Adrian =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>=3D=3D=3D =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Section 1 =
concludes with <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Although the =
example <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>described in =
Section 7 specify means to configure OAM identifiers for =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>MPLS-TP =
tunnels, this should be seen as indicating how the MIB values =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>would be =
returned in the specified circumstances having been =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>configured =
by alternative means. <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Two =
thoughts: <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>1. This text =
needs to be repeated in Section 7 <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>2. This =
would read better as: <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Although the =
example <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>described in =
Section 7 shows a way to configure OAM identifiers for =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>MPLS-TP =
tunnels, this also indicates how the MIB values would be =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>returned if =
they had been configured by alternative means. <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;mso-bidi-font-size:11.0pt;font-family:"Calibri"=
,"sans-serif";mso-fareast-font-family:"Times New =
Roman";mso-bidi-font-family:"Times New =
Roman";mso-ansi-language:EN-US;mso-fareast-language:KO'>[JR] OK, those =
two points will be reflected to the revision.</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>--- =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Section 4. =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>The first =
sentence is a little hard to read... <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>RFC 6378 =
[RFC6378] defines the protocol to provide a linear =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>protection =
switching mechanism for MPLS-TP with protection domain as =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>a =
point-to-point LSP. <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Looking at =
section 1.1. of RFC 6378, I think you could write... =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>RFC 6378 =
[RFC6378] defines the protocol to provide a linear =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>protection =
switching mechanism for MPLS-TP for a point-to-point LSP =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>within the =
protection domain bounded by the end points of the LSP. =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN-US'>[JR] OK.</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>--- =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Is Section =
5.1 too terse? Maybe a two line explanation of each new TC? =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN-US'>[JR] Would the following =
text be ok?</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;mso-fareast-font-family:Gul=
im;mso-bidi-font-family:Courier;mso-ansi-language:EN-US'>The following =
new textual conventions are defined in this document:</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;mso-layout-grid-align:none;-ms-=
word-break: keep-all'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;mso-fareast-font-family:Gul=
im;mso-bidi-font-family:Courier;mso-ansi-language:EN-US'>o MplsLpsReq: =
This Textual Convention describes an object that </span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;text-indent:10.0pt;mso-char-ind=
ent-count:1.0;mso-layout-grid-align:none;-ms-word-break: keep-all'><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;mso-fareast-font-family:Gul=
im;mso-bidi-font-family:Courier;mso-ansi-language:EN-US'>stores the PSC =
Request field of the PSC control packet.</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;text-indent:10.0pt;mso-char-ind=
ent-count:1.0;mso-layout-grid-align:none;-ms-word-break: keep-all'><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;mso-fareast-font-family:Gul=
im;mso-bidi-font-family:Courier;mso-ansi-language:EN-US'>&nbsp;</span><sp=
an =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;mso-layout-grid-align:none;-ms-=
word-break: keep-all'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;mso-fareast-font-family:Gul=
im;mso-bidi-font-family:Courier;mso-ansi-language:EN-US'>o =
MplsLpsFpathPath: This Textual Convention describes an object =
</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;text-indent:15.0pt;mso-char-ind=
ent-count:1.5;mso-layout-grid-align:none;-ms-word-break: keep-all'><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;mso-fareast-font-family:Gul=
im;mso-bidi-font-family:Courier;mso-ansi-language:EN-US'>that stores the =
Fault Path (FPath) field and Data Path (Path) </span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;text-indent:15.0pt;mso-char-ind=
ent-count:1.5;mso-layout-grid-align:none;-ms-word-break: keep-all'><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;mso-fareast-font-family:Gul=
im;mso-bidi-font-family:Courier;mso-ansi-language:EN-US'>field of the =
PSC control packet.</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;text-indent:15.0pt;mso-char-ind=
ent-count:1.5;mso-layout-grid-align:none;-ms-word-break: keep-all'><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;mso-fareast-font-family:Gul=
im;mso-bidi-font-family:Courier;mso-ansi-language:EN-US'>&nbsp;</span><sp=
an =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;mso-layout-grid-align:none;-ms-=
word-break: keep-all'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;mso-fareast-font-family:Gul=
im;mso-bidi-font-family:Courier;mso-ansi-language:EN-US'>o =
MplsLpsCommand: This Textual Convention describes an object that =
</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;text-indent:15.0pt;mso-char-ind=
ent-count:1.5;mso-layout-grid-align:none;-ms-word-break: keep-all'><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;mso-fareast-font-family:Gul=
im;mso-bidi-font-family:Courier;mso-ansi-language:EN-US'>allows a user =
to perform any action over a protection domain.</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;text-indent:15.0pt;mso-char-ind=
ent-count:1.5;mso-layout-grid-align:none;-ms-word-break: keep-all'><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;mso-fareast-font-family:Gul=
im;mso-bidi-font-family:Courier;mso-ansi-language:EN-US'>&nbsp;</span><sp=
an =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;mso-layout-grid-align:none;-ms-=
word-break: keep-all'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;mso-fareast-font-family:Gul=
im;mso-bidi-font-family:Courier;mso-ansi-language:EN-US'>o MplsLpsState: =
This Textual Convention describes an object that </span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;text-indent:10.0pt;mso-char-ind=
ent-count:1.0;mso-layout-grid-align:none;-ms-word-break: keep-all'><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;mso-fareast-font-family:Gul=
im;mso-bidi-font-family:Courier;mso-ansi-language:EN-US'>stores the =
current state of the PSC state machine.</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-family:"Gulim","sans-serif"'>&nbsp;</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>--- =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Please have =
a quick check to see whether sometimes when you say &quot;this =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>MIB&quot; =
you mean &quot;this MIB module&quot; (etc., for other uses of =
&quot;MIB&quot;). <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>For example =
the Description clause of mplsLpsNotificationEnable =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&quot;Provide=
s the ability to enable and disable notifications =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>defined in =
this MIB. <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN =
style=3D'font-size:10.0pt;mso-bidi-font-size:11.0pt;font-family:"Calibri"=
,"sans-serif";mso-fareast-font-family:"Times New =
Roman";mso-bidi-font-family:"Times New =
Roman";mso-ansi-language:EN;mso-fareast-language:KO'>[JR] I checked the =
whole document, and that was the only place to add the word, =
</span><span lang=3DKO =
style=3D'font-size:10.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family=
:Calibri;mso-fareast-font-family:"Times New =
Roman";mso-hansi-font-family:Calibri;mso-bidi-font-family:"Times New =
Roman";mso-ansi-language:EN;mso-fareast-language:KO'>=E2=80=9C</span><spa=
n lang=3DEN =
style=3D'font-size:10.0pt;mso-bidi-font-size:11.0pt;font-family:"Calibri"=
,"sans-serif";mso-fareast-font-family:"Times New =
Roman";mso-bidi-font-family:"Times New =
Roman";mso-ansi-language:EN;mso-fareast-language:KO'>module</span><span =
lang=3DKO =
style=3D'font-size:10.0pt;mso-bidi-font-size:11.0pt;mso-ascii-font-family=
:Calibri;mso-fareast-font-family:"Times New =
Roman";mso-hansi-font-family:Calibri;mso-bidi-font-family:"Times New =
Roman";mso-ansi-language:EN;mso-fareast-language:KO'>=E2=80=9D</span><spa=
n lang=3DEN =
style=3D'font-size:10.0pt;mso-bidi-font-size:11.0pt;font-family:"Calibri"=
,"sans-serif";mso-fareast-font-family:"Times New =
Roman";mso-bidi-font-family:"Times New =
Roman";mso-ansi-language:EN;mso-fareast-language:KO'>.</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>--- =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>It is a =
little odd that MplsLpsReq has a syntax of <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>OCTET STRING =
(SIZE (2)), a display hint of &quot;1d&quot;, and you list the =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>potential =
values in binary. <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>I should =
think that the values should be listed in decimal as they =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>are shown in =
RFC6378 and RFC7271. <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Then it is =
just a question of whether this should be a text string or =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>an integer, =
which probably doesn't matter, but if your keep it as a =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>octet =
string, you do need to say how the numbers are encoded (presumably =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>ASCII?). =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN =
style=3D'font-size:10.0pt;mso-bidi-font-size:11.0pt;font-family:"Calibri"=
,"sans-serif";mso-fareast-font-family:"Times New =
Roman";mso-bidi-font-family:"Times New =
Roman";mso-ansi-language:EN;mso-fareast-language:KO'>[JR] I will change =
it to an integer.</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>--- =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>For =
MplsLpsFpathPath why do you say... <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Bits are =
numbered from left to right. <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>...I don't =
see any reference to bits. <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN'>[JR] The notion of left/right =
was intended to indicate that FPath (the first octet, which is in left) =
is followed by Path (the second octet, which is in right). But, you are =
right and there is no reference to bits.</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;mso-layout-grid-align:none;-ms-=
word-break: keep-all'><span lang=3DEN =
style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN'>Would it be ok to remove the =
sentence, </span><span style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN'>=E2=80=9C</span><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;mso-fareast-font-family:Gul=
im;mso-bidi-font-family:Courier;mso-ansi-language:EN-US'>Bits are =
numbered from left to right.=E2=80=9D</span><span lang=3DEN =
style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN'> ?</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN'>&nbsp;</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>--- =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>mplsLpsConfig=
SdBadSeconds and mplsLpsConfigSdGoodSeconds could use a =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Units clause =
(although it should be pretty obvious from the name and =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>description!)=
 <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN'>[JR] UNITS </span><span =
style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN'>=E2=80=9C<span =
lang=3DEN>seconds</span>=E2=80=9D<span lang=3DEN> will be =
added.</span></span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>--- =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Is there a =
reason why you used <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>SYNTAX =
INTEGER {true (1), false (2)} <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>instead of =
TruthValue in <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>mplsLpsStatus=
RevertiveMismatch <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>mplsLpsStatus=
ProtecTypeMismatch <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>mplsLpsStatus=
CapabilitiesMismatch <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>mplsLpsStatus=
PathConfigMismatch OBJECT-TYPE <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN'>[JR] No reason. TruthValue =
will be used in the revision.</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>--- =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>mplsLpsStatus=
PathConfigMismatch OBJECT-TYPE <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>SYNTAX =
INTEGER {true (1), falsmplsOamIdMeMpIndexNexte (2)} =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Looks like a =
typo although it will compile :-) <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN'>[JR] Once TruthValue is in =
place, this mistake will&nbsp;go away.</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-family:"Gulim","sans-serif"'>&nbsp;</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>=3D=3D=3D =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Nits =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>--- =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Section 1 =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>s/read- =
write/read-write/ <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>s/document =
is consistent/document are consistent/ <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>--- =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Section 4 =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>s/alternate/a=
lternative/ <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>--- =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>Section 5.3 =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>s/failures =
of linear protection/failures of the linear protection/ =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>--- =
<o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>mplsLpsMeStat=
usTable <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>s/liear/linea=
r/ <o:p></o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
lang=3DEN style=3D'font-size:10.0pt;font-family:"Malgun =
Gothic","sans-serif";mso-ansi-language:EN'>[JR] All the nits will be =
fixed. Thank you.</span><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p></o:p></=
span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'><o:p>&nbsp;</=
o:p></span></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt;line-height:15.0pt'><span =
style=3D'font-size:10.0pt;font-family:"Gulim","sans-serif"'>&nbsp;<o:p></=
o:p></span></p></div></div></div></div></div></div></div></body></html>
------=_NextPart_000_010D_01D27025.0FBA63A0--



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From: "BRUNGARD, DEBORAH A" <db3546@att.com>
To: Benoit Claise <bclaise@cisco.com>, Loa Andersson <loa@pi.nu>, "Brian Carpenter" <brian.e.carpenter@gmail.com>, "gen-art@ietf.org" <gen-art@ietf.org>
Thread-Topic: [mpls] Review of draft-ietf-mpls-tp-linear-protection-mib-11
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Subject: Re: [mpls] Review of draft-ietf-mpls-tp-linear-protection-mib-11
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Thanks Benoit-

As Loa confirmed, we don't see this as an update. It's aligned with how we =
have been doing the MPLS-TP work e.g. RFC7697 has the same wording.

Thanks Brian for the careful review-
Deborah


> -----Original Message-----
> From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Benoit Claise
> Sent: Monday, January 16, 2017 2:35 AM
> To: Loa Andersson <loa@pi.nu>; Brian Carpenter
> <brian.e.carpenter@gmail.com>; gen-art@ietf.org
> Cc: mpls@ietf.org
> Subject: Re: [mpls] Review of draft-ietf-mpls-tp-linear-protection-mib-11
>=20
> Loa, Brian,
> > Brian, et.al.,
> >
> > We could of course update 3812 (and 3813), though this would probably
> > lead to another discussion on what updates means.
> >
> > What is refereed to is that there is now another preferred method for
> > configuration - netconf/yang. In fact this draft doe not change 3812 or
> > propose a change, so there can not be an update. The document is just
> > noting that there is a change in the environment, and that for the time
> > being it will use RFC 3812 as specified.
> >
> > Maybe Benoit have a take on this?
> No strong views on updating RFC 3812, but the text in the intro section
> and the read-only conformance statement (WriteUp mentions: The MIB
> module has a read-only conformance statement so that vendors and/or
> network operators can choose to implement/operate the MIB module as
> read-only.) do the job IMO.
>=20
> Regards, Benoit
> >
> > /Loa
> >
> > On 2017-01-16 06:04, Brian Carpenter wrote:
> >> Reviewer: Brian Carpenter
> >> Review result: Ready with Issues
> >>
> >> Gen-ART Last Call review of
> >> draft-ietf-mpls-tp-linear-protection-mib-11
> >>
> >> I am the assigned Gen-ART reviewer for this draft. The General Area
> >> Review Team (Gen-ART) reviews all IETF documents being processed
> >> by the IESG for the IETF Chair.  Please treat these comments just
> >> like any other last call comments.
> >>
> >> For more information, please see the FAQ at
> >> <http://wiki.tools.ietf.org/area/gen/trac/wiki/GenArtfaq>.
> >>
> >> Document: draft-ietf-mpls-tp-linear-protection-mib-11.txt
> >> Reviewer: Brian Carpenter
> >> Review Date: 2017-01-16
> >> IETF LC End Date: 2017-01-26
> >> IESG Telechat date:
> >>
> >> Summary: Ready with minor issues
> >> --------
> >>
> >> Comment:
> >> --------
> >>
> >> I have not reviewed most details of the MIB module itself. As usual,
> >> I trust the MIB Doctors.
> >>
> >> "We know of a handful of implementations (or intent to implement)."
> >> Good. It would have been nice to see an Implementation Status section
> >> under RFC 6982.
> >>
> >> Minor issues:
> >> -------------
> >>
> >>    At the time of writing, Simple Network Management Protocol (SNMP)
> >> SET
> >>    is no longer recommended as a way to configure MPLS networks as
> >> was
> >>    described in RFC 3812 [RFC3812].
> >>
> >> RFC3812 is explicit that it should be used for configuration:
> >>
> >>    This MIB module should be used in conjunction with the
> >>    companion document [RFC3813] for MPLS based traffic engineering
> >>    configuration and management.
> >>
> >> RFC3812 has not been formally updated or obsoleted. Therefore, it
> >> seems
> >> to me that the present draft should formally update RFC3812 in this
> >> respect.
> >>
> >> Does the same issue apply to RFC3813, whose Abstract also states that
> >> it is used to configure an LSR?
> >>
> >
>=20
> _______________________________________________
> mpls mailing list
> mpls@ietf.org
> https://www.ietf.org/mailman/listinfo/mpls


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To: "BRUNGARD, DEBORAH A" <db3546@att.com>, Benoit Claise <bclaise@cisco.com>, Loa Andersson <loa@pi.nu>, "gen-art@ietf.org" <gen-art@ietf.org>
References: <148451784736.3226.15889507299394185360.idtracker@ietfa.amsl.com> <a35bfb84-091b-a408-9a53-0b6dbd5cd003@pi.nu> <54feb39c-0e5b-9c12-0ae2-d5757316c9c3@cisco.com> <F64C10EAA68C8044B33656FA214632C85DE45354@MISOUT7MSGUSRDE.ITServices.sbc.com>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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Date: Tue, 17 Jan 2017 08:48:31 +1300
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Subject: Re: [mpls] Review of draft-ietf-mpls-tp-linear-protection-mib-11
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Fair enough.

Regards
   Brian

On 17/01/2017 08:13, BRUNGARD, DEBORAH A wrote:
> Thanks Benoit-
> 
> As Loa confirmed, we don't see this as an update. It's aligned with how we have been doing the MPLS-TP work e.g. RFC7697 has the same wording.
> 
> Thanks Brian for the careful review-
> Deborah
> 
> 
>> -----Original Message-----
>> From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Benoit Claise
>> Sent: Monday, January 16, 2017 2:35 AM
>> To: Loa Andersson <loa@pi.nu>; Brian Carpenter
>> <brian.e.carpenter@gmail.com>; gen-art@ietf.org
>> Cc: mpls@ietf.org
>> Subject: Re: [mpls] Review of draft-ietf-mpls-tp-linear-protection-mib-11
>>
>> Loa, Brian,
>>> Brian, et.al.,
>>>
>>> We could of course update 3812 (and 3813), though this would probably
>>> lead to another discussion on what updates means.
>>>
>>> What is refereed to is that there is now another preferred method for
>>> configuration - netconf/yang. In fact this draft doe not change 3812 or
>>> propose a change, so there can not be an update. The document is just
>>> noting that there is a change in the environment, and that for the time
>>> being it will use RFC 3812 as specified.
>>>
>>> Maybe Benoit have a take on this?
>> No strong views on updating RFC 3812, but the text in the intro section
>> and the read-only conformance statement (WriteUp mentions: The MIB
>> module has a read-only conformance statement so that vendors and/or
>> network operators can choose to implement/operate the MIB module as
>> read-only.) do the job IMO.
>>
>> Regards, Benoit
>>>
>>> /Loa
>>>
>>> On 2017-01-16 06:04, Brian Carpenter wrote:
>>>> Reviewer: Brian Carpenter
>>>> Review result: Ready with Issues
>>>>
>>>> Gen-ART Last Call review of
>>>> draft-ietf-mpls-tp-linear-protection-mib-11
>>>>
>>>> I am the assigned Gen-ART reviewer for this draft. The General Area
>>>> Review Team (Gen-ART) reviews all IETF documents being processed
>>>> by the IESG for the IETF Chair.  Please treat these comments just
>>>> like any other last call comments.
>>>>
>>>> For more information, please see the FAQ at
>>>> <http://wiki.tools.ietf.org/area/gen/trac/wiki/GenArtfaq>.
>>>>
>>>> Document: draft-ietf-mpls-tp-linear-protection-mib-11.txt
>>>> Reviewer: Brian Carpenter
>>>> Review Date: 2017-01-16
>>>> IETF LC End Date: 2017-01-26
>>>> IESG Telechat date:
>>>>
>>>> Summary: Ready with minor issues
>>>> --------
>>>>
>>>> Comment:
>>>> --------
>>>>
>>>> I have not reviewed most details of the MIB module itself. As usual,
>>>> I trust the MIB Doctors.
>>>>
>>>> "We know of a handful of implementations (or intent to implement)."
>>>> Good. It would have been nice to see an Implementation Status section
>>>> under RFC 6982.
>>>>
>>>> Minor issues:
>>>> -------------
>>>>
>>>>    At the time of writing, Simple Network Management Protocol (SNMP)
>>>> SET
>>>>    is no longer recommended as a way to configure MPLS networks as
>>>> was
>>>>    described in RFC 3812 [RFC3812].
>>>>
>>>> RFC3812 is explicit that it should be used for configuration:
>>>>
>>>>    This MIB module should be used in conjunction with the
>>>>    companion document [RFC3813] for MPLS based traffic engineering
>>>>    configuration and management.
>>>>
>>>> RFC3812 has not been formally updated or obsoleted. Therefore, it
>>>> seems
>>>> to me that the present draft should formally update RFC3812 in this
>>>> respect.
>>>>
>>>> Does the same issue apply to RFC3813, whose Abstract also states that
>>>> it is used to configure an LSR?
>>>>
>>>
>>
>> _______________________________________________
>> mpls mailing list
>> mpls@ietf.org
>> https://www.ietf.org/mailman/listinfo/mpls
> 


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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 18 Jan 2017 08:13:28 -0800
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To: Robert Sparks <rjsparks@nostrum.com>
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Hi Robert,
once again, thank you for your thorough review and the most detailed
comments. I've prepared updated version and would greatly appreciate if you
review the changes and let us know whether your comments been addressed.
Attached are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com> wrote:

> Reviewer: Robert Sparks
> Review result: Ready with Nits
>
> I am the assigned Gen-ART reviewer for this draft. The General Area
> Review Team (Gen-ART) reviews all IETF documents being processed
> by the IESG for the IETF Chair.  Please treat these comments just
> like any other last call comments.
>
> For more information, please see the FAQ at
> <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
>
> Document: draft-ietf-mpls-residence-time-12
> Reviewer: Robert Sparks
> Review Date: 2017-01-10
> IETF LC End Date: 2017-01-17
> IESG Telechat date: 2017-02-02
>
> Summary: Ready (with nits) for publication as a Proposed Standard
>
> I have two primary comments. I expect both are rooted in the authors
> and working group knowing what the document means instead of seeing
> what
> it says or doesn't say:
>
> 1) The document is loose with its use of 'packet', and where TTLs
> appear when
> they are discussed. It might be helpful to rephrase the text that
> speaks
> of RTM packets in terms of RTM messages that are encoded as G-ACh
> messages and
> not refer to packets unless you mean the whole encapsulated packet
> with MPLS
> header, ACH, and G-ACh message.
>
> 2) Since this new mechanic speaks in terms of fractional nanoseconds,
> some
> discussion of what trigger-point you intend people to use for taking
> the
> precise time of a packet's arrival or departure seems warranted. (The
> first and
> last bit of the whole encapsulated packet above are going to appear at
> the
> physical layer many nanoseconds apart at OC192 speeds if I've done the
> math
> right). It may be obvious to the folks discussing this, but it's not
> obvious
> from the document.  If it's _not_ obvious and variation in technique
> is
> expected, then some discussion about issues that might arise from
> different
> implementation choices would be welcome.
>
> The rest of these are editorial nits:
>
> It would help to pull an overview description of the difference
> between
> one-step and two-step much earlier in the document. I suggest in the
> overview
> in section 2. Otherwise, the reader really has to jump forward and
> read section
> 7 before section 3's 5th bullet makes any sense.
>
> In section 3, "IANA will be asked" should be made active. Say "This
> document
> asks IANA to" and point to the IANA consideration section. Apply
> similar
> treatment to the other places where you talk about future IANA
> actions.
>
> There are several places where there are missing words (typically
> articles or
> prepositions). You're less likely to end up with misinterpretations
> during the
> RFC Editor phase if you provide them before the document gets that far
> in the
> process. The spots I found most disruptive were these (this is not
> intended to
> be exhaustive):
>
>   Section 3: "set 1 according" -> "set to 1 according"
>   Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
>   Section 4.2: "Detailed discussion of ... modes in Section 7."
>                         -> "Detailed discussion of ... modes appears
> in Section 7."
>   Section 10: "most of" -> "most of all"
>
> In Setion 3.1 at "identity of the source port", please point into the
> document
> that defines this identity and its representation. I suspect this is a
> pointer
> into a specific section in IEEE.1588.2008].
>
>
>
>

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<div dir=3D"ltr">Hi Robert,<div>once again, thank you for your thorough rev=
iew and the most detailed comments. I&#39;ve prepared updated version and w=
ould greatly appreciate if you review the changes and let us know whether y=
our comments been addressed. Attached are diff and the new version.</div><d=
iv><br></div><div>Regards,</div><div>Greg</div></div><div class=3D"gmail_ex=
tra"><br><div class=3D"gmail_quote">On Wed, Jan 11, 2017 at 7:48 AM, Robert=
 Sparks <span dir=3D"ltr">&lt;<a href=3D"mailto:rjsparks@nostrum.com" targe=
t=3D"_blank">rjsparks@nostrum.com</a>&gt;</span> wrote:<br><blockquote clas=
s=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pad=
ding-left:1ex">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.=C2=A0 Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" rel=3D"norefe=
rrer" target=3D"_blank">https://trac.ietf.org/trac/<wbr>gen/wiki/GenArtfaq<=
/a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-<wbr>time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn&#39;t say:<br>
<br>
1) The document is loose with its use of &#39;packet&#39;, and where TTLs<b=
r>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet&#39;s arrival or departure seems warranted. (The<b=
r>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I&#39;ve done the<=
br>
math<br>
right). It may be obvious to the folks discussing this, but it&#39;s not<br=
>
obvious<br>
from the document.=C2=A0 If it&#39;s _not_ obvious and variation in techniq=
ue<br>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3&#39;s 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You&#39;re less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
=C2=A0 Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
=C2=A0 Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
=C2=A0 Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
=C2=A0 Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].<br>
<br>
<br>
<br>
</blockquote></div><br></div>

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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 18 Jan 2017 08:15:18 -0800
Message-ID: <CA+RyBmU3XmrXvu2ZZ2VNxS60jneuMn_TfsrR2NZz3=L0uUKRVg@mail.gmail.com>
To: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
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Cc: "mpls@ietf.org" <mpls@ietf.org>, ops-dir@ietf.org, draft-ietf-mpls-residence-time.all@ietf.org, "ietf@ietf.org" <ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Hi Jurgen,
I've prepared updated version and would greatly appreciate if you review
the changes and let us know whether your comments been addressed. Attached
are diff and the new version.

Regards,
Greg

On Fri, Jan 13, 2017 at 12:47 AM, <"J=C3=BCrgen Sch=C3=B6nw=C3=A4lder
<j.schoenwaelder@jac"@ietfa.amsl.com> wrote:

> Reviewer: J=C3=BCrgen Sch=C3=B6nw=C3=A4lder
> Review result: Has Nits
>
> I do not see any major OPS related issues. I am not an MPLS expert
> and
> this will likely show in my comments. Most of my comments below are
> editorial or trying to make the document easier to read for first
> time
> readers not deeply involved in the work.
>
> - Consider to avoid acronyms in the Abstract. I had to lookup what
>   G-ACh and PTP resolve to in order to read the abstract, which I
>   think should be avoided.
>
> - The sentence starting 'I.e.' in parenthesis in the Introduction
>   almost reads like a definition of Residence Time. Is it useful to
>   have this sentence in parenthesis and starting with 'I.e.'? It
> would
>   be nice to have a clear definition of Residence Time. In fact, my
>   reading is that residence time sometimes refers to the per hop
>   residence them and sometimes to the accumulated per path residence
>   time. Does it make sense to distinguish a Node Residence Time from
> a
>   Path Residence Time? Or a Residence Time from an Accumulated
>   Residence Time?
>
> - While reading section 3, I was wondering what are 1-step nodes and
>   what are 2-step nodes? This is later explained in detail inq
> section
>   7. Perhaps it makes sense to introduce the concept earlier and to
>   provide a forward pointer to section 7 for the details.
>
> - I suggest to either always write one-step and two-step or 1-step
> and
>   2-step. Mixing writing styles makes searching in the text a bit
> more
>   complicated.
>
> - The document seems to be PTP specific even though there are
>   provisions to support other time synchronization protocols. I
>   wonder, though, to what extend this would work for lets say NTP.
>   There is quite some text refering to the correctionField, which
>   seems to be a PTP-specific field.
>
> - s/Scratch Pad filed/Scratch Pad field/
>
> - Does the Interface ID related to other interface numbers, e.g.,
>   SNMP's ifIndex? Or is this an entirely separate number space? Or
>   does it depend on the implementor's choice?
>
> - In section 7, enumerated item 1, there is a hanging open
> parenthesis
>   which seem to have to sub-items inside. I suggest to change this by
>   s/forthcoming (this/forthcoming. This/
>
> - In section 8.3: s/.  .  /.  /
>
> - It may be useful to add instructions that the RFC editor is
> expected
>   to replace TBAx in the text once IANA has done the assignments.
>
> - What does 'particularly as applied to use related to PTP' mean?
>
>
>

--94eb2c03307411717f054660b988
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<div dir=3D"ltr">Hi Jurgen,<div>I&#39;ve prepared updated version and would=
 greatly appreciate if you review the changes and let us know whether your =
comments been addressed. Attached are diff and the new version.</div><div><=
br></div><div>Regards,</div><div>Greg</div></div><div class=3D"gmail_extra"=
><br><div class=3D"gmail_quote">On Fri, Jan 13, 2017 at 12:47 AM,  <span di=
r=3D"ltr">&lt;<a href=3D"mailto:&quot;J=C3=BCrgen Sch=C3=B6nw=C3=A4lder &lt=
;j.schoenwaelder@jac&quot;@ietfa.amsl.com" target=3D"_blank">&quot;J=C3=BCr=
gen Sch=C3=B6nw=C3=A4lder &lt;j.schoenwaelder@jac&quot;@ietfa.amsl.com</a>&=
gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 =
0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Reviewer: J=C3=BCrgen S=
ch=C3=B6nw=C3=A4lder<br>
Review result: Has Nits<br>
<br>
I do not see any major OPS related issues. I am not an MPLS expert<br>
and<br>
this will likely show in my comments. Most of my comments below are<br>
editorial or trying to make the document easier to read for first<br>
time<br>
readers not deeply involved in the work.<br>
<br>
- Consider to avoid acronyms in the Abstract. I had to lookup what<br>
=C2=A0 G-ACh and PTP resolve to in order to read the abstract, which I<br>
=C2=A0 think should be avoided.<br>
<br>
- The sentence starting &#39;I.e.&#39; in parenthesis in the Introduction<b=
r>
=C2=A0 almost reads like a definition of Residence Time. Is it useful to<br=
>
=C2=A0 have this sentence in parenthesis and starting with &#39;I.e.&#39;? =
It<br>
would<br>
=C2=A0 be nice to have a clear definition of Residence Time. In fact, my<br=
>
=C2=A0 reading is that residence time sometimes refers to the per hop<br>
=C2=A0 residence them and sometimes to the accumulated per path residence<b=
r>
=C2=A0 time. Does it make sense to distinguish a Node Residence Time from<b=
r>
a<br>
=C2=A0 Path Residence Time? Or a Residence Time from an Accumulated<br>
=C2=A0 Residence Time?<br>
<br>
- While reading section 3, I was wondering what are 1-step nodes and<br>
=C2=A0 what are 2-step nodes? This is later explained in detail inq<br>
section<br>
=C2=A0 7. Perhaps it makes sense to introduce the concept earlier and to<br=
>
=C2=A0 provide a forward pointer to section 7 for the details.<br>
<br>
- I suggest to either always write one-step and two-step or 1-step<br>
and<br>
=C2=A0 2-step. Mixing writing styles makes searching in the text a bit<br>
more<br>
=C2=A0 complicated.<br>
<br>
- The document seems to be PTP specific even though there are<br>
=C2=A0 provisions to support other time synchronization protocols. I<br>
=C2=A0 wonder, though, to what extend this would work for lets say NTP.<br>
=C2=A0 There is quite some text refering to the correctionField, which<br>
=C2=A0 seems to be a PTP-specific field.<br>
<br>
- s/Scratch Pad filed/Scratch Pad field/<br>
<br>
- Does the Interface ID related to other interface numbers, e.g.,<br>
=C2=A0 SNMP&#39;s ifIndex? Or is this an entirely separate number space? Or=
<br>
=C2=A0 does it depend on the implementor&#39;s choice?<br>
<br>
- In section 7, enumerated item 1, there is a hanging open<br>
parenthesis<br>
=C2=A0 which seem to have to sub-items inside. I suggest to change this by<=
br>
=C2=A0 s/forthcoming (this/forthcoming. This/<br>
<br>
- In section 8.3: s/.=C2=A0 .=C2=A0 /.=C2=A0 /<br>
<br>
- It may be useful to add instructions that the RFC editor is<br>
expected<br>
=C2=A0 to replace TBAx in the text once IANA has done the assignments.<br>
<br>
- What does &#39;particularly as applied to use related to PTP&#39; mean?<b=
r>
<br>
<br>
</blockquote></div><br></div>

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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 18 Jan 2017 10:03:57 -0800
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To: Robert Sparks <rjsparks@nostrum.com>
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between
discussion of one-step and two-step modes that you've pointed out. We've
moved Section 7 as sub-section into Section 2 now. Attached are updated
diff and the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com> wrote:

> Hi Robert,
> once again, thank you for your thorough review and the most detailed
> comments. I've prepared updated version and would greatly appreciate if you
> review the changes and let us know whether your comments been addressed.
> Attached are diff and the new version.
>
> Regards,
> Greg
>
> On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com>
> wrote:
>
>> Reviewer: Robert Sparks
>> Review result: Ready with Nits
>>
>> I am the assigned Gen-ART reviewer for this draft. The General Area
>> Review Team (Gen-ART) reviews all IETF documents being processed
>> by the IESG for the IETF Chair.  Please treat these comments just
>> like any other last call comments.
>>
>> For more information, please see the FAQ at
>> <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
>>
>> Document: draft-ietf-mpls-residence-time-12
>> Reviewer: Robert Sparks
>> Review Date: 2017-01-10
>> IETF LC End Date: 2017-01-17
>> IESG Telechat date: 2017-02-02
>>
>> Summary: Ready (with nits) for publication as a Proposed Standard
>>
>> I have two primary comments. I expect both are rooted in the authors
>> and working group knowing what the document means instead of seeing
>> what
>> it says or doesn't say:
>>
>> 1) The document is loose with its use of 'packet', and where TTLs
>> appear when
>> they are discussed. It might be helpful to rephrase the text that
>> speaks
>> of RTM packets in terms of RTM messages that are encoded as G-ACh
>> messages and
>> not refer to packets unless you mean the whole encapsulated packet
>> with MPLS
>> header, ACH, and G-ACh message.
>>
>> 2) Since this new mechanic speaks in terms of fractional nanoseconds,
>> some
>> discussion of what trigger-point you intend people to use for taking
>> the
>> precise time of a packet's arrival or departure seems warranted. (The
>> first and
>> last bit of the whole encapsulated packet above are going to appear at
>> the
>> physical layer many nanoseconds apart at OC192 speeds if I've done the
>> math
>> right). It may be obvious to the folks discussing this, but it's not
>> obvious
>> from the document.  If it's _not_ obvious and variation in technique
>> is
>> expected, then some discussion about issues that might arise from
>> different
>> implementation choices would be welcome.
>>
>> The rest of these are editorial nits:
>>
>> It would help to pull an overview description of the difference
>> between
>> one-step and two-step much earlier in the document. I suggest in the
>> overview
>> in section 2. Otherwise, the reader really has to jump forward and
>> read section
>> 7 before section 3's 5th bullet makes any sense.
>>
>> In section 3, "IANA will be asked" should be made active. Say "This
>> document
>> asks IANA to" and point to the IANA consideration section. Apply
>> similar
>> treatment to the other places where you talk about future IANA
>> actions.
>>
>> There are several places where there are missing words (typically
>> articles or
>> prepositions). You're less likely to end up with misinterpretations
>> during the
>> RFC Editor phase if you provide them before the document gets that far
>> in the
>> process. The spots I found most disruptive were these (this is not
>> intended to
>> be exhaustive):
>>
>>   Section 3: "set 1 according" -> "set to 1 according"
>>   Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
>>   Section 4.2: "Detailed discussion of ... modes in Section 7."
>>                         -> "Detailed discussion of ... modes appears
>> in Section 7."
>>   Section 10: "most of" -> "most of all"
>>
>> In Setion 3.1 at "identity of the source port", please point into the
>> document
>> that defines this identity and its representation. I suspect this is a
>> pointer
>> into a specific section in IEEE.1588.2008].
>>
>>
>>
>>
>

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Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Robert,<div>Sasha Vainshtein came with elegant idea to =
address disconnection between discussion of one-step and two-step modes tha=
t you&#39;ve pointed out. We&#39;ve moved Section 7 as sub-section into Sec=
tion 2 now. Attached are updated diff and the proposed new version -13.</di=
v><div><br></div><div>Regards,</div><div>Greg</div></div><div class=3D"gmai=
l_extra"><br><div class=3D"gmail_quote">On Wed, Jan 18, 2017 at 8:13 AM, Gr=
eg Mirsky <span dir=3D"ltr">&lt;<a href=3D"mailto:gregimirsky@gmail.com" ta=
rget=3D"_blank">gregimirsky@gmail.com</a>&gt;</span> wrote:<br><blockquote =
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid=
;padding-left:1ex"><div dir=3D"ltr">Hi Robert,<div>once again, thank you fo=
r your thorough review and the most detailed comments. I&#39;ve prepared up=
dated version and would greatly appreciate if you review the changes and le=
t us know whether your comments been addressed. Attached are diff and the n=
ew version.</div><div><br></div><div>Regards,</div><div>Greg</div></div><di=
v class=3D"gmail_extra"><br><div class=3D"gmail_quote"><span class=3D"">On =
Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <span dir=3D"ltr">&lt;<a href=
=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.com</a>=
&gt;</span> wrote:<br></span><div><div class=3D"h5"><blockquote class=3D"gm=
ail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-le=
ft:1ex">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.=C2=A0 Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" rel=3D"norefe=
rrer" target=3D"_blank">https://trac.ietf.org/trac/ge<wbr>n/wiki/GenArtfaq<=
/a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time<wbr>-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn&#39;t say:<br>
<br>
1) The document is loose with its use of &#39;packet&#39;, and where TTLs<b=
r>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet&#39;s arrival or departure seems warranted. (The<b=
r>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I&#39;ve done the<=
br>
math<br>
right). It may be obvious to the folks discussing this, but it&#39;s not<br=
>
obvious<br>
from the document.=C2=A0 If it&#39;s _not_ obvious and variation in techniq=
ue<br>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3&#39;s 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You&#39;re less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
=C2=A0 Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
=C2=A0 Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
=C2=A0 Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
=C2=A0 Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].<br>
<br>
<br>
<br>
</blockquote></div></div></div><br></div>
</blockquote></div><br></div>

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--001a11402c029d10ae0546623d7e--


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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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The changes all look good.

I still think you should say something in the document about what "the 
time of packet arrival" and "transmission" means, and call out the point 
you made about being careful to not introduce apparent jitter by not 
making those measurements consistently. (The definitions you point to in 
your earlier mail from G.8013 don't really help - they just say "time of 
packet arrival". Again, the first and last bit are likely to be several 
nanoseconds apart so I think it matters. Perhaps you're saying it 
doesn't matter as long as each node is consistent (there will be error 
in the residence time measurement, but it will be constant at each node, 
so the sum of errors will be constant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of 
"as case" and "in case" that should be made consistent. I suspect it 
would be easiest to simply say "referred to as using a one-step clock" 
and "referred to as using a two-step clock" or similar.

RjS


On 1/18/17 12:03 PM, Greg Mirsky wrote:
> Hi Robert,
> Sasha Vainshtein came with elegant idea to address disconnection 
> between discussion of one-step and two-step modes that you've pointed 
> out. We've moved Section 7 as sub-section into Section 2 now. Attached 
> are updated diff and the proposed new version -13.
>
> Regards,
> Greg
>
> On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com 
> <mailto:gregimirsky@gmail.com>> wrote:
>
>     Hi Robert,
>     once again, thank you for your thorough review and the most
>     detailed comments. I've prepared updated version and would greatly
>     appreciate if you review the changes and let us know whether your
>     comments been addressed. Attached are diff and the new version.
>
>     Regards,
>     Greg
>
>     On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks
>     <rjsparks@nostrum.com <mailto:rjsparks@nostrum.com>> wrote:
>
>         Reviewer: Robert Sparks
>         Review result: Ready with Nits
>
>         I am the assigned Gen-ART reviewer for this draft. The General
>         Area
>         Review Team (Gen-ART) reviews all IETF documents being processed
>         by the IESG for the IETF Chair.  Please treat these comments just
>         like any other last call comments.
>
>         For more information, please see the FAQ at
>         <https://trac.ietf.org/trac/gen/wiki/GenArtfaq
>         <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>>.
>
>         Document: draft-ietf-mpls-residence-time-12
>         Reviewer: Robert Sparks
>         Review Date: 2017-01-10
>         IETF LC End Date: 2017-01-17
>         IESG Telechat date: 2017-02-02
>
>         Summary: Ready (with nits) for publication as a Proposed Standard
>
>         I have two primary comments. I expect both are rooted in the
>         authors
>         and working group knowing what the document means instead of
>         seeing
>         what
>         it says or doesn't say:
>
>         1) The document is loose with its use of 'packet', and where TTLs
>         appear when
>         they are discussed. It might be helpful to rephrase the text that
>         speaks
>         of RTM packets in terms of RTM messages that are encoded as G-ACh
>         messages and
>         not refer to packets unless you mean the whole encapsulated packet
>         with MPLS
>         header, ACH, and G-ACh message.
>
>         2) Since this new mechanic speaks in terms of fractional
>         nanoseconds,
>         some
>         discussion of what trigger-point you intend people to use for
>         taking
>         the
>         precise time of a packet's arrival or departure seems
>         warranted. (The
>         first and
>         last bit of the whole encapsulated packet above are going to
>         appear at
>         the
>         physical layer many nanoseconds apart at OC192 speeds if I've
>         done the
>         math
>         right). It may be obvious to the folks discussing this, but
>         it's not
>         obvious
>         from the document.  If it's _not_ obvious and variation in
>         technique
>         is
>         expected, then some discussion about issues that might arise from
>         different
>         implementation choices would be welcome.
>
>         The rest of these are editorial nits:
>
>         It would help to pull an overview description of the difference
>         between
>         one-step and two-step much earlier in the document. I suggest
>         in the
>         overview
>         in section 2. Otherwise, the reader really has to jump forward and
>         read section
>         7 before section 3's 5th bullet makes any sense.
>
>         In section 3, "IANA will be asked" should be made active. Say
>         "This
>         document
>         asks IANA to" and point to the IANA consideration section. Apply
>         similar
>         treatment to the other places where you talk about future IANA
>         actions.
>
>         There are several places where there are missing words (typically
>         articles or
>         prepositions). You're less likely to end up with
>         misinterpretations
>         during the
>         RFC Editor phase if you provide them before the document gets
>         that far
>         in the
>         process. The spots I found most disruptive were these (this is not
>         intended to
>         be exhaustive):
>
>           Section 3: "set 1 according" -> "set to 1 according"
>           Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
>           Section 4.2: "Detailed discussion of ... modes in Section 7."
>                                 -> "Detailed discussion of ... modes
>         appears
>         in Section 7."
>           Section 10: "most of" -> "most of all"
>
>         In Setion 3.1 at "identity of the source port", please point
>         into the
>         document
>         that defines this identity and its representation. I suspect
>         this is a
>         pointer
>         into a specific section in IEEE.1588.2008].
>
>
>
>
>


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    <p>The changes all look good.</p>
    <p>I still think you should say something in the document about what
      "the time of packet arrival" and "transmission" means, and call
      out the point you made about being careful to not introduce
      apparent jitter by not making those measurements consistently.
      (The definitions you point to in your earlier mail from G.8013
      don't really help - they just say "time of packet arrival". Again,
      the first and last bit are likely to be several nanoseconds apart
      so I think it matters. Perhaps you're saying it doesn't matter as
      long as each node is consistent (there will be error in the
      residence time measurement, but it will be constant at each node,
      so the sum of errors will be constant, and the clocks will be ok?)</p>
    <p>Please look at the new first paragraph of section 2 - there's a
      mix of "as case" and "in case" that should be made consistent. I
      suspect it would be easiest to simply say "referred to as using a
      one-step clock" and "referred to as using a two-step clock" or
      similar.</p>
    <p>RjS<br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 1/18/17 12:03 PM, Greg Mirsky wrote:<br>
    </div>
    <blockquote
cite="mid:CA+RyBmVrvyiwDp2kV3VLiQtqOaL=MaVjZugGbvgWnp6y3dwP3Q@mail.gmail.com"
      type="cite">
      <div dir="ltr">Hi Robert,
        <div>Sasha Vainshtein came with elegant idea to address
          disconnection between discussion of one-step and two-step
          modes that you've pointed out. We've moved Section 7 as
          sub-section into Section 2 now. Attached are updated diff and
          the proposed new version -13.</div>
        <div><br>
        </div>
        <div>Regards,</div>
        <div>Greg</div>
      </div>
      <div class="gmail_extra"><br>
        <div class="gmail_quote">On Wed, Jan 18, 2017 at 8:13 AM, Greg
          Mirsky <span dir="ltr">&lt;<a moz-do-not-send="true"
              href="mailto:gregimirsky@gmail.com" target="_blank">gregimirsky@gmail.com</a>&gt;</span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div dir="ltr">Hi Robert,
              <div>once again, thank you for your thorough review and
                the most detailed comments. I've prepared updated
                version and would greatly appreciate if you review the
                changes and let us know whether your comments been
                addressed. Attached are diff and the new version.</div>
              <div><br>
              </div>
              <div>Regards,</div>
              <div>Greg</div>
            </div>
            <div class="gmail_extra"><br>
              <div class="gmail_quote"><span class="">On Wed, Jan 11,
                  2017 at 7:48 AM, Robert Sparks <span dir="ltr">&lt;<a
                      moz-do-not-send="true"
                      href="mailto:rjsparks@nostrum.com" target="_blank">rjsparks@nostrum.com</a>&gt;</span>
                  wrote:<br>
                </span>
                <div>
                  <div class="h5">
                    <blockquote class="gmail_quote" style="margin:0 0 0
                      .8ex;border-left:1px #ccc solid;padding-left:1ex">Reviewer:
                      Robert Sparks<br>
                      Review result: Ready with Nits<br>
                      <br>
                      I am the assigned Gen-ART reviewer for this draft.
                      The General Area<br>
                      Review Team (Gen-ART) reviews all IETF documents
                      being processed<br>
                      by the IESG for the IETF Chair.  Please treat
                      these comments just<br>
                      like any other last call comments.<br>
                      <br>
                      For more information, please see the FAQ at<br>
                      &lt;<a moz-do-not-send="true"
                        href="https://trac.ietf.org/trac/gen/wiki/GenArtfaq"
                        rel="noreferrer" target="_blank">https://trac.ietf.org/trac/ge<wbr>n/wiki/GenArtfaq</a>&gt;.<br>
                      <br>
                      Document: draft-ietf-mpls-residence-time<wbr>-12<br>
                      Reviewer: Robert Sparks<br>
                      Review Date: 2017-01-10<br>
                      IETF LC End Date: 2017-01-17<br>
                      IESG Telechat date: 2017-02-02<br>
                      <br>
                      Summary: Ready (with nits) for publication as a
                      Proposed Standard<br>
                      <br>
                      I have two primary comments. I expect both are
                      rooted in the authors<br>
                      and working group knowing what the document means
                      instead of seeing<br>
                      what<br>
                      it says or doesn't say:<br>
                      <br>
                      1) The document is loose with its use of 'packet',
                      and where TTLs<br>
                      appear when<br>
                      they are discussed. It might be helpful to
                      rephrase the text that<br>
                      speaks<br>
                      of RTM packets in terms of RTM messages that are
                      encoded as G-ACh<br>
                      messages and<br>
                      not refer to packets unless you mean the whole
                      encapsulated packet<br>
                      with MPLS<br>
                      header, ACH, and G-ACh message.<br>
                      <br>
                      2) Since this new mechanic speaks in terms of
                      fractional nanoseconds,<br>
                      some<br>
                      discussion of what trigger-point you intend people
                      to use for taking<br>
                      the<br>
                      precise time of a packet's arrival or departure
                      seems warranted. (The<br>
                      first and<br>
                      last bit of the whole encapsulated packet above
                      are going to appear at<br>
                      the<br>
                      physical layer many nanoseconds apart at OC192
                      speeds if I've done the<br>
                      math<br>
                      right). It may be obvious to the folks discussing
                      this, but it's not<br>
                      obvious<br>
                      from the document.  If it's _not_ obvious and
                      variation in technique<br>
                      is<br>
                      expected, then some discussion about issues that
                      might arise from<br>
                      different<br>
                      implementation choices would be welcome.<br>
                      <br>
                      The rest of these are editorial nits:<br>
                      <br>
                      It would help to pull an overview description of
                      the difference<br>
                      between<br>
                      one-step and two-step much earlier in the
                      document. I suggest in the<br>
                      overview<br>
                      in section 2. Otherwise, the reader really has to
                      jump forward and<br>
                      read section<br>
                      7 before section 3's 5th bullet makes any sense.<br>
                      <br>
                      In section 3, "IANA will be asked" should be made
                      active. Say "This<br>
                      document<br>
                      asks IANA to" and point to the IANA consideration
                      section. Apply<br>
                      similar<br>
                      treatment to the other places where you talk about
                      future IANA<br>
                      actions.<br>
                      <br>
                      There are several places where there are missing
                      words (typically<br>
                      articles or<br>
                      prepositions). You're less likely to end up with
                      misinterpretations<br>
                      during the<br>
                      RFC Editor phase if you provide them before the
                      document gets that far<br>
                      in the<br>
                      process. The spots I found most disruptive were
                      these (this is not<br>
                      intended to<br>
                      be exhaustive):<br>
                      <br>
                        Section 3: "set 1 according" -&gt; "set to 1
                      according"<br>
                        Section 3: "the Table 19 [IEEE..." -&gt; "Table
                      19 of [IEEE..."<br>
                        Section 4.2: "Detailed discussion of ... modes
                      in Section 7."<br>
                                              -&gt; "Detailed discussion
                      of ... modes appears<br>
                      in Section 7."<br>
                        Section 10: "most of" -&gt; "most of all"<br>
                      <br>
                      In Setion 3.1 at "identity of the source port",
                      please point into the<br>
                      document<br>
                      that defines this identity and its representation.
                      I suspect this is a<br>
                      pointer<br>
                      into a specific section in IEEE.1588.2008].<br>
                      <br>
                      <br>
                      <br>
                    </blockquote>
                  </div>
                </div>
              </div>
              <br>
            </div>
          </blockquote>
        </div>
        <br>
      </div>
    </blockquote>
    <br>
  </body>
</html>

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To: Robert Sparks <rjsparks@nostrum.com>, Greg Mirsky <gregimirsky@gmail.com>
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From: Stewart Bryant <stewart.bryant@gmail.com>
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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We need to be clear that you only need to be consistent within a node. 
There is no requirement for any two nodes along the path use the same 
bit in the packet as an epoch, nor do the input and output need to 
physically use the same bit in the packet as the epoch provided they 
know and account for the wire delay that corresponds to those bits. So 
long as we accurately measure the local variable delay that is all that 
is required.

- Stewart



On 18/01/2017 18:34, Robert Sparks wrote:
>
> The changes all look good.
>
> I still think you should say something in the document about what "the 
> time of packet arrival" and "transmission" means, and call out the 
> point you made about being careful to not introduce apparent jitter by 
> not making those measurements consistently. (The definitions you point 
> to in your earlier mail from G.8013 don't really help - they just say 
> "time of packet arrival". Again, the first and last bit are likely to 
> be several nanoseconds apart so I think it matters. Perhaps you're 
> saying it doesn't matter as long as each node is consistent (there 
> will be error in the residence time measurement, but it will be 
> constant at each node, so the sum of errors will be constant, and the 
> clocks will be ok?)
>
> Please look at the new first paragraph of section 2 - there's a mix of 
> "as case" and "in case" that should be made consistent. I suspect it 
> would be easiest to simply say "referred to as using a one-step clock" 
> and "referred to as using a two-step clock" or similar.
>
> RjS
>
>
> On 1/18/17 12:03 PM, Greg Mirsky wrote:
>> Hi Robert,
>> Sasha Vainshtein came with elegant idea to address disconnection 
>> between discussion of one-step and two-step modes that you've pointed 
>> out. We've moved Section 7 as sub-section into Section 2 now. 
>> Attached are updated diff and the proposed new version -13.
>>
>> Regards,
>> Greg
>>
>> On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com 
>> <mailto:gregimirsky@gmail.com>> wrote:
>>
>>     Hi Robert,
>>     once again, thank you for your thorough review and the most
>>     detailed comments. I've prepared updated version and would
>>     greatly appreciate if you review the changes and let us know
>>     whether your comments been addressed. Attached are diff and the
>>     new version.
>>
>>     Regards,
>>     Greg
>>
>>     On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks
>>     <rjsparks@nostrum.com <mailto:rjsparks@nostrum.com>> wrote:
>>
>>         Reviewer: Robert Sparks
>>         Review result: Ready with Nits
>>
>>         I am the assigned Gen-ART reviewer for this draft. The
>>         General Area
>>         Review Team (Gen-ART) reviews all IETF documents being processed
>>         by the IESG for the IETF Chair.  Please treat these comments just
>>         like any other last call comments.
>>
>>         For more information, please see the FAQ at
>>         <https://trac.ietf.org/trac/gen/wiki/GenArtfaq
>>         <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>>.
>>
>>         Document: draft-ietf-mpls-residence-time-12
>>         Reviewer: Robert Sparks
>>         Review Date: 2017-01-10
>>         IETF LC End Date: 2017-01-17
>>         IESG Telechat date: 2017-02-02
>>
>>         Summary: Ready (with nits) for publication as a Proposed Standard
>>
>>         I have two primary comments. I expect both are rooted in the
>>         authors
>>         and working group knowing what the document means instead of
>>         seeing
>>         what
>>         it says or doesn't say:
>>
>>         1) The document is loose with its use of 'packet', and where TTLs
>>         appear when
>>         they are discussed. It might be helpful to rephrase the text that
>>         speaks
>>         of RTM packets in terms of RTM messages that are encoded as G-ACh
>>         messages and
>>         not refer to packets unless you mean the whole encapsulated
>>         packet
>>         with MPLS
>>         header, ACH, and G-ACh message.
>>
>>         2) Since this new mechanic speaks in terms of fractional
>>         nanoseconds,
>>         some
>>         discussion of what trigger-point you intend people to use for
>>         taking
>>         the
>>         precise time of a packet's arrival or departure seems
>>         warranted. (The
>>         first and
>>         last bit of the whole encapsulated packet above are going to
>>         appear at
>>         the
>>         physical layer many nanoseconds apart at OC192 speeds if I've
>>         done the
>>         math
>>         right). It may be obvious to the folks discussing this, but
>>         it's not
>>         obvious
>>         from the document.  If it's _not_ obvious and variation in
>>         technique
>>         is
>>         expected, then some discussion about issues that might arise from
>>         different
>>         implementation choices would be welcome.
>>
>>         The rest of these are editorial nits:
>>
>>         It would help to pull an overview description of the difference
>>         between
>>         one-step and two-step much earlier in the document. I suggest
>>         in the
>>         overview
>>         in section 2. Otherwise, the reader really has to jump
>>         forward and
>>         read section
>>         7 before section 3's 5th bullet makes any sense.
>>
>>         In section 3, "IANA will be asked" should be made active. Say
>>         "This
>>         document
>>         asks IANA to" and point to the IANA consideration section. Apply
>>         similar
>>         treatment to the other places where you talk about future IANA
>>         actions.
>>
>>         There are several places where there are missing words (typically
>>         articles or
>>         prepositions). You're less likely to end up with
>>         misinterpretations
>>         during the
>>         RFC Editor phase if you provide them before the document gets
>>         that far
>>         in the
>>         process. The spots I found most disruptive were these (this
>>         is not
>>         intended to
>>         be exhaustive):
>>
>>           Section 3: "set 1 according" -> "set to 1 according"
>>           Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
>>           Section 4.2: "Detailed discussion of ... modes in Section 7."
>>                                 -> "Detailed discussion of ... modes
>>         appears
>>         in Section 7."
>>           Section 10: "most of" -> "most of all"
>>
>>         In Setion 3.1 at "identity of the source port", please point
>>         into the
>>         document
>>         that defines this identity and its representation. I suspect
>>         this is a
>>         pointer
>>         into a specific section in IEEE.1588.2008].
>>
>>
>>
>>
>>
>


--------------7B89250D800A8519E02998A3
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    <p><br>
    </p>
    We need to be clear that you only need to be consistent within a
    node. There is no requirement for any two nodes along the path use
    the same bit in the packet as an epoch, nor do the input and output
    need to physically use the same bit in the packet as the epoch
    provided they know and account for the wire delay that corresponds
    to those bits. So long as we accurately measure the local variable
    delay that is all that is required.<br>
    <br>
    - Stewart<br>
    <br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 18/01/2017 18:34, Robert Sparks
      wrote:<br>
    </div>
    <blockquote
      cite="mid:95d41b52-5c85-869f-2139-6713816e9637@nostrum.com"
      type="cite">
      <meta content="text/html; charset=windows-1252"
        http-equiv="Content-Type">
      <p>The changes all look good.</p>
      <p>I still think you should say something in the document about
        what "the time of packet arrival" and "transmission" means, and
        call out the point you made about being careful to not introduce
        apparent jitter by not making those measurements consistently.
        (The definitions you point to in your earlier mail from G.8013
        don't really help - they just say "time of packet arrival".
        Again, the first and last bit are likely to be several
        nanoseconds apart so I think it matters. Perhaps you're saying
        it doesn't matter as long as each node is consistent (there will
        be error in the residence time measurement, but it will be
        constant at each node, so the sum of errors will be constant,
        and the clocks will be ok?)</p>
      <p>Please look at the new first paragraph of section 2 - there's a
        mix of "as case" and "in case" that should be made consistent. I
        suspect it would be easiest to simply say "referred to as using
        a one-step clock" and "referred to as using a two-step clock" or
        similar.</p>
      <p>RjS<br>
      </p>
      <br>
      <div class="moz-cite-prefix">On 1/18/17 12:03 PM, Greg Mirsky
        wrote:<br>
      </div>
      <blockquote
cite="mid:CA+RyBmVrvyiwDp2kV3VLiQtqOaL=MaVjZugGbvgWnp6y3dwP3Q@mail.gmail.com"
        type="cite">
        <div dir="ltr">Hi Robert,
          <div>Sasha Vainshtein came with elegant idea to address
            disconnection between discussion of one-step and two-step
            modes that you've pointed out. We've moved Section 7 as
            sub-section into Section 2 now. Attached are updated diff
            and the proposed new version -13.</div>
          <div><br>
          </div>
          <div>Regards,</div>
          <div>Greg</div>
        </div>
        <div class="gmail_extra"><br>
          <div class="gmail_quote">On Wed, Jan 18, 2017 at 8:13 AM, Greg
            Mirsky <span dir="ltr">&lt;<a moz-do-not-send="true"
                href="mailto:gregimirsky@gmail.com" target="_blank">gregimirsky@gmail.com</a>&gt;</span>
            wrote:<br>
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">
              <div dir="ltr">Hi Robert,
                <div>once again, thank you for your thorough review and
                  the most detailed comments. I've prepared updated
                  version and would greatly appreciate if you review the
                  changes and let us know whether your comments been
                  addressed. Attached are diff and the new version.</div>
                <div><br>
                </div>
                <div>Regards,</div>
                <div>Greg</div>
              </div>
              <div class="gmail_extra"><br>
                <div class="gmail_quote"><span class="">On Wed, Jan 11,
                    2017 at 7:48 AM, Robert Sparks <span dir="ltr">&lt;<a
                        moz-do-not-send="true"
                        href="mailto:rjsparks@nostrum.com"
                        target="_blank">rjsparks@nostrum.com</a>&gt;</span>
                    wrote:<br>
                  </span>
                  <div>
                    <div class="h5">
                      <blockquote class="gmail_quote" style="margin:0 0
                        0 .8ex;border-left:1px #ccc
                        solid;padding-left:1ex">Reviewer: Robert Sparks<br>
                        Review result: Ready with Nits<br>
                        <br>
                        I am the assigned Gen-ART reviewer for this
                        draft. The General Area<br>
                        Review Team (Gen-ART) reviews all IETF documents
                        being processed<br>
                        by the IESG for the IETF Chair.  Please treat
                        these comments just<br>
                        like any other last call comments.<br>
                        <br>
                        For more information, please see the FAQ at<br>
                        &lt;<a moz-do-not-send="true"
                          href="https://trac.ietf.org/trac/gen/wiki/GenArtfaq"
                          rel="noreferrer" target="_blank">https://trac.ietf.org/trac/ge<wbr>n/wiki/GenArtfaq</a>&gt;.<br>
                        <br>
                        Document: draft-ietf-mpls-residence-time<wbr>-12<br>
                        Reviewer: Robert Sparks<br>
                        Review Date: 2017-01-10<br>
                        IETF LC End Date: 2017-01-17<br>
                        IESG Telechat date: 2017-02-02<br>
                        <br>
                        Summary: Ready (with nits) for publication as a
                        Proposed Standard<br>
                        <br>
                        I have two primary comments. I expect both are
                        rooted in the authors<br>
                        and working group knowing what the document
                        means instead of seeing<br>
                        what<br>
                        it says or doesn't say:<br>
                        <br>
                        1) The document is loose with its use of
                        'packet', and where TTLs<br>
                        appear when<br>
                        they are discussed. It might be helpful to
                        rephrase the text that<br>
                        speaks<br>
                        of RTM packets in terms of RTM messages that are
                        encoded as G-ACh<br>
                        messages and<br>
                        not refer to packets unless you mean the whole
                        encapsulated packet<br>
                        with MPLS<br>
                        header, ACH, and G-ACh message.<br>
                        <br>
                        2) Since this new mechanic speaks in terms of
                        fractional nanoseconds,<br>
                        some<br>
                        discussion of what trigger-point you intend
                        people to use for taking<br>
                        the<br>
                        precise time of a packet's arrival or departure
                        seems warranted. (The<br>
                        first and<br>
                        last bit of the whole encapsulated packet above
                        are going to appear at<br>
                        the<br>
                        physical layer many nanoseconds apart at OC192
                        speeds if I've done the<br>
                        math<br>
                        right). It may be obvious to the folks
                        discussing this, but it's not<br>
                        obvious<br>
                        from the document.  If it's _not_ obvious and
                        variation in technique<br>
                        is<br>
                        expected, then some discussion about issues that
                        might arise from<br>
                        different<br>
                        implementation choices would be welcome.<br>
                        <br>
                        The rest of these are editorial nits:<br>
                        <br>
                        It would help to pull an overview description of
                        the difference<br>
                        between<br>
                        one-step and two-step much earlier in the
                        document. I suggest in the<br>
                        overview<br>
                        in section 2. Otherwise, the reader really has
                        to jump forward and<br>
                        read section<br>
                        7 before section 3's 5th bullet makes any sense.<br>
                        <br>
                        In section 3, "IANA will be asked" should be
                        made active. Say "This<br>
                        document<br>
                        asks IANA to" and point to the IANA
                        consideration section. Apply<br>
                        similar<br>
                        treatment to the other places where you talk
                        about future IANA<br>
                        actions.<br>
                        <br>
                        There are several places where there are missing
                        words (typically<br>
                        articles or<br>
                        prepositions). You're less likely to end up with
                        misinterpretations<br>
                        during the<br>
                        RFC Editor phase if you provide them before the
                        document gets that far<br>
                        in the<br>
                        process. The spots I found most disruptive were
                        these (this is not<br>
                        intended to<br>
                        be exhaustive):<br>
                        <br>
                          Section 3: "set 1 according" -&gt; "set to 1
                        according"<br>
                          Section 3: "the Table 19 [IEEE..." -&gt;
                        "Table 19 of [IEEE..."<br>
                          Section 4.2: "Detailed discussion of ... modes
                        in Section 7."<br>
                                                -&gt; "Detailed
                        discussion of ... modes appears<br>
                        in Section 7."<br>
                          Section 10: "most of" -&gt; "most of all"<br>
                        <br>
                        In Setion 3.1 at "identity of the source port",
                        please point into the<br>
                        document<br>
                        that defines this identity and its
                        representation. I suspect this is a<br>
                        pointer<br>
                        into a specific section in IEEE.1588.2008].<br>
                        <br>
                        <br>
                        <br>
                      </blockquote>
                    </div>
                  </div>
                </div>
                <br>
              </div>
            </blockquote>
          </div>
          <br>
        </div>
      </blockquote>
      <br>
    </blockquote>
    <br>
  </body>
</html>

--------------7B89250D800A8519E02998A3--


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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 18 Jan 2017 11:25:07 -0800
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--001a11c1591cdacfbe0546635f6b
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Hi Robert,
thank you for the most expedient review and comments. I'll make changes in
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com>
wrote:

> The changes all look good.
>
> I still think you should say something in the document about what "the
> time of packet arrival" and "transmission" means, and call out the point
> you made about being careful to not introduce apparent jitter by not making
> those measurements consistently. (The definitions you point to in your
> earlier mail from G.8013 don't really help - they just say "time of packet
> arrival". Again, the first and last bit are likely to be several
> nanoseconds apart so I think it matters. Perhaps you're saying it doesn't
> matter as long as each node is consistent (there will be error in the
> residence time measurement, but it will be constant at each node, so the
> sum of errors will be constant, and the clocks will be ok?)
>
> Please look at the new first paragraph of section 2 - there's a mix of "as
> case" and "in case" that should be made consistent. I suspect it would be
> easiest to simply say "referred to as using a one-step clock" and "referred
> to as using a two-step clock" or similar.
>
> RjS
>
> On 1/18/17 12:03 PM, Greg Mirsky wrote:
>
> Hi Robert,
> Sasha Vainshtein came with elegant idea to address disconnection between
> discussion of one-step and two-step modes that you've pointed out. We've
> moved Section 7 as sub-section into Section 2 now. Attached are updated
> diff and the proposed new version -13.
>
> Regards,
> Greg
>
> On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com>
> wrote:
>
>> Hi Robert,
>> once again, thank you for your thorough review and the most detailed
>> comments. I've prepared updated version and would greatly appreciate if you
>> review the changes and let us know whether your comments been addressed.
>> Attached are diff and the new version.
>>
>> Regards,
>> Greg
>>
>> On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com>
>> wrote:
>>
>>> Reviewer: Robert Sparks
>>> Review result: Ready with Nits
>>>
>>> I am the assigned Gen-ART reviewer for this draft. The General Area
>>> Review Team (Gen-ART) reviews all IETF documents being processed
>>> by the IESG for the IETF Chair.  Please treat these comments just
>>> like any other last call comments.
>>>
>>> For more information, please see the FAQ at
>>> <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
>>>
>>> Document: draft-ietf-mpls-residence-time-12
>>> Reviewer: Robert Sparks
>>> Review Date: 2017-01-10
>>> IETF LC End Date: 2017-01-17
>>> IESG Telechat date: 2017-02-02
>>>
>>> Summary: Ready (with nits) for publication as a Proposed Standard
>>>
>>> I have two primary comments. I expect both are rooted in the authors
>>> and working group knowing what the document means instead of seeing
>>> what
>>> it says or doesn't say:
>>>
>>> 1) The document is loose with its use of 'packet', and where TTLs
>>> appear when
>>> they are discussed. It might be helpful to rephrase the text that
>>> speaks
>>> of RTM packets in terms of RTM messages that are encoded as G-ACh
>>> messages and
>>> not refer to packets unless you mean the whole encapsulated packet
>>> with MPLS
>>> header, ACH, and G-ACh message.
>>>
>>> 2) Since this new mechanic speaks in terms of fractional nanoseconds,
>>> some
>>> discussion of what trigger-point you intend people to use for taking
>>> the
>>> precise time of a packet's arrival or departure seems warranted. (The
>>> first and
>>> last bit of the whole encapsulated packet above are going to appear at
>>> the
>>> physical layer many nanoseconds apart at OC192 speeds if I've done the
>>> math
>>> right). It may be obvious to the folks discussing this, but it's not
>>> obvious
>>> from the document.  If it's _not_ obvious and variation in technique
>>> is
>>> expected, then some discussion about issues that might arise from
>>> different
>>> implementation choices would be welcome.
>>>
>>> The rest of these are editorial nits:
>>>
>>> It would help to pull an overview description of the difference
>>> between
>>> one-step and two-step much earlier in the document. I suggest in the
>>> overview
>>> in section 2. Otherwise, the reader really has to jump forward and
>>> read section
>>> 7 before section 3's 5th bullet makes any sense.
>>>
>>> In section 3, "IANA will be asked" should be made active. Say "This
>>> document
>>> asks IANA to" and point to the IANA consideration section. Apply
>>> similar
>>> treatment to the other places where you talk about future IANA
>>> actions.
>>>
>>> There are several places where there are missing words (typically
>>> articles or
>>> prepositions). You're less likely to end up with misinterpretations
>>> during the
>>> RFC Editor phase if you provide them before the document gets that far
>>> in the
>>> process. The spots I found most disruptive were these (this is not
>>> intended to
>>> be exhaustive):
>>>
>>>   Section 3: "set 1 according" -> "set to 1 according"
>>>   Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
>>>   Section 4.2: "Detailed discussion of ... modes in Section 7."
>>>                         -> "Detailed discussion of ... modes appears
>>> in Section 7."
>>>   Section 10: "most of" -> "most of all"
>>>
>>> In Setion 3.1 at "identity of the source port", please point into the
>>> document
>>> that defines this identity and its representation. I suspect this is a
>>> pointer
>>> into a specific section in IEEE.1588.2008].
>>>
>>>
>>>
>>>
>>
>
>

--001a11c1591cdacfbe0546635f6b
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Robert,<div>thank you for the most expedient review and=
 comments. I&#39;ll make changes in Section 2 per your suggestion.</div><di=
v><br></div><div>Regards,</div><div>Greg</div></div><div class=3D"gmail_ext=
ra"><br><div class=3D"gmail_quote">On Wed, Jan 18, 2017 at 10:34 AM, Robert=
 Sparks <span dir=3D"ltr">&lt;<a href=3D"mailto:rjsparks@nostrum.com" targe=
t=3D"_blank">rjsparks@nostrum.com</a>&gt;</span> wrote:<br><blockquote clas=
s=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pad=
ding-left:1ex">
 =20
   =20
 =20
  <div bgcolor=3D"#FFFFFF" text=3D"#000000">
    <p>The changes all look good.</p>
    <p>I still think you should say something in the document about what
      &quot;the time of packet arrival&quot; and &quot;transmission&quot; m=
eans, and call
      out the point you made about being careful to not introduce
      apparent jitter by not making those measurements consistently.
      (The definitions you point to in your earlier mail from G.8013
      don&#39;t really help - they just say &quot;time of packet arrival&qu=
ot;. Again,
      the first and last bit are likely to be several nanoseconds apart
      so I think it matters. Perhaps you&#39;re saying it doesn&#39;t matte=
r as
      long as each node is consistent (there will be error in the
      residence time measurement, but it will be constant at each node,
      so the sum of errors will be constant, and the clocks will be ok?)</p=
>
    <p>Please look at the new first paragraph of section 2 - there&#39;s a
      mix of &quot;as case&quot; and &quot;in case&quot; that should be mad=
e consistent. I
      suspect it would be easiest to simply say &quot;referred to as using =
a
      one-step clock&quot; and &quot;referred to as using a two-step clock&=
quot; or
      similar.</p>
    <p>RjS<br>
    </p><div><div class=3D"h5">
    <br>
    <div class=3D"m_8583848577547623980moz-cite-prefix">On 1/18/17 12:03 PM=
, Greg Mirsky wrote:<br>
    </div>
    <blockquote type=3D"cite">
      <div dir=3D"ltr">Hi Robert,
        <div>Sasha Vainshtein came with elegant idea to address
          disconnection between discussion of one-step and two-step
          modes that you&#39;ve pointed out. We&#39;ve moved Section 7 as
          sub-section into Section 2 now. Attached are updated diff and
          the proposed new version -13.</div>
        <div><br>
        </div>
        <div>Regards,</div>
        <div>Greg</div>
      </div>
      <div class=3D"gmail_extra"><br>
        <div class=3D"gmail_quote">On Wed, Jan 18, 2017 at 8:13 AM, Greg
          Mirsky <span dir=3D"ltr">&lt;<a href=3D"mailto:gregimirsky@gmail.=
com" target=3D"_blank">gregimirsky@gmail.com</a>&gt;</span>
          wrote:<br>
          <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bord=
er-left:1px #ccc solid;padding-left:1ex">
            <div dir=3D"ltr">Hi Robert,
              <div>once again, thank you for your thorough review and
                the most detailed comments. I&#39;ve prepared updated
                version and would greatly appreciate if you review the
                changes and let us know whether your comments been
                addressed. Attached are diff and the new version.</div>
              <div><br>
              </div>
              <div>Regards,</div>
              <div>Greg</div>
            </div>
            <div class=3D"gmail_extra"><br>
              <div class=3D"gmail_quote"><span>On Wed, Jan 11,
                  2017 at 7:48 AM, Robert Sparks <span dir=3D"ltr">&lt;<a h=
ref=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.com<=
/a>&gt;</span>
                  wrote:<br>
                </span>
                <div>
                  <div class=3D"m_8583848577547623980h5">
                    <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0=
 .8ex;border-left:1px #ccc solid;padding-left:1ex">Reviewer:
                      Robert Sparks<br>
                      Review result: Ready with Nits<br>
                      <br>
                      I am the assigned Gen-ART reviewer for this draft.
                      The General Area<br>
                      Review Team (Gen-ART) reviews all IETF documents
                      being processed<br>
                      by the IESG for the IETF Chair.=C2=A0 Please treat
                      these comments just<br>
                      like any other last call comments.<br>
                      <br>
                      For more information, please see the FAQ at<br>
                      &lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/Ge=
nArtfaq" rel=3D"noreferrer" target=3D"_blank">https://trac.ietf.org/trac/ge=
<wbr>n/wiki/GenArtfaq</a>&gt;.<br>
                      <br>
                      Document: draft-ietf-mpls-residence-time<wbr>-12<br>
                      Reviewer: Robert Sparks<br>
                      Review Date: 2017-01-10<br>
                      IETF LC End Date: 2017-01-17<br>
                      IESG Telechat date: 2017-02-02<br>
                      <br>
                      Summary: Ready (with nits) for publication as a
                      Proposed Standard<br>
                      <br>
                      I have two primary comments. I expect both are
                      rooted in the authors<br>
                      and working group knowing what the document means
                      instead of seeing<br>
                      what<br>
                      it says or doesn&#39;t say:<br>
                      <br>
                      1) The document is loose with its use of &#39;packet&=
#39;,
                      and where TTLs<br>
                      appear when<br>
                      they are discussed. It might be helpful to
                      rephrase the text that<br>
                      speaks<br>
                      of RTM packets in terms of RTM messages that are
                      encoded as G-ACh<br>
                      messages and<br>
                      not refer to packets unless you mean the whole
                      encapsulated packet<br>
                      with MPLS<br>
                      header, ACH, and G-ACh message.<br>
                      <br>
                      2) Since this new mechanic speaks in terms of
                      fractional nanoseconds,<br>
                      some<br>
                      discussion of what trigger-point you intend people
                      to use for taking<br>
                      the<br>
                      precise time of a packet&#39;s arrival or departure
                      seems warranted. (The<br>
                      first and<br>
                      last bit of the whole encapsulated packet above
                      are going to appear at<br>
                      the<br>
                      physical layer many nanoseconds apart at OC192
                      speeds if I&#39;ve done the<br>
                      math<br>
                      right). It may be obvious to the folks discussing
                      this, but it&#39;s not<br>
                      obvious<br>
                      from the document.=C2=A0 If it&#39;s _not_ obvious an=
d
                      variation in technique<br>
                      is<br>
                      expected, then some discussion about issues that
                      might arise from<br>
                      different<br>
                      implementation choices would be welcome.<br>
                      <br>
                      The rest of these are editorial nits:<br>
                      <br>
                      It would help to pull an overview description of
                      the difference<br>
                      between<br>
                      one-step and two-step much earlier in the
                      document. I suggest in the<br>
                      overview<br>
                      in section 2. Otherwise, the reader really has to
                      jump forward and<br>
                      read section<br>
                      7 before section 3&#39;s 5th bullet makes any sense.<=
br>
                      <br>
                      In section 3, &quot;IANA will be asked&quot; should b=
e made
                      active. Say &quot;This<br>
                      document<br>
                      asks IANA to&quot; and point to the IANA consideratio=
n
                      section. Apply<br>
                      similar<br>
                      treatment to the other places where you talk about
                      future IANA<br>
                      actions.<br>
                      <br>
                      There are several places where there are missing
                      words (typically<br>
                      articles or<br>
                      prepositions). You&#39;re less likely to end up with
                      misinterpretations<br>
                      during the<br>
                      RFC Editor phase if you provide them before the
                      document gets that far<br>
                      in the<br>
                      process. The spots I found most disruptive were
                      these (this is not<br>
                      intended to<br>
                      be exhaustive):<br>
                      <br>
                      =C2=A0 Section 3: &quot;set 1 according&quot; -&gt; &=
quot;set to 1
                      according&quot;<br>
                      =C2=A0 Section 3: &quot;the Table 19 [IEEE...&quot; -=
&gt; &quot;Table
                      19 of [IEEE...&quot;<br>
                      =C2=A0 Section 4.2: &quot;Detailed discussion of ... =
modes
                      in Section 7.&quot;<br>
                      =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 -&gt; &quot;Detailed discussion
                      of ... modes appears<br>
                      in Section 7.&quot;<br>
                      =C2=A0 Section 10: &quot;most of&quot; -&gt; &quot;mo=
st of all&quot;<br>
                      <br>
                      In Setion 3.1 at &quot;identity of the source port&qu=
ot;,
                      please point into the<br>
                      document<br>
                      that defines this identity and its representation.
                      I suspect this is a<br>
                      pointer<br>
                      into a specific section in IEEE.1588.2008].<br>
                      <br>
                      <br>
                      <br>
                    </blockquote>
                  </div>
                </div>
              </div>
              <br>
            </div>
          </blockquote>
        </div>
        <br>
      </div>
    </blockquote>
    <br>
  </div></div></div>

</blockquote></div><br></div>

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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Greg Mirsky <gregimirsky@gmail.com>, Robert Sparks <rjsparks@nostrum.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Hi Greg,

Although it is a bit late, we=92ve had some discussions amongst the IS-IS a=
nd OSPF chairs and are wondering whether the interface capability belongs i=
n the IGPs. This will be flooded throughout the entire routing domain =96 i=
s it really needed on every node or will it the RTM testing be initiated fr=
om an omniscient NMS client that would know the capabilities of each node o=
r easily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].








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<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
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ly: Calibri, sans-serif;">
<div>Hi Greg,&nbsp;</div>
<div><br>
</div>
<div>Although it is a bit late, we=92ve had some discussions amongst the IS=
-IS and OSPF chairs and are wondering whether the interface capability belo=
ngs in the IGPs. This will be flooded throughout the entire routing domain =
=96 is it really needed on every node
 or will it the RTM testing be initiated from an omniscient NMS client that=
 would know the capabilities of each node or easily query them using YANG?&=
nbsp;</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Acee &nbsp;</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>mpls &lt;<a href=3D"mailto:mp=
ls-bounces@ietf.org">mpls-bounces@ietf.org</a>&gt; on behalf of Greg Mirsky=
 &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;=
<br>
<span style=3D"font-weight:bold">Date: </span>Wednesday, January 18, 2017 a=
t 1:25 PM<br>
<span style=3D"font-weight:bold">To: </span>Robert Sparks &lt;<a href=3D"ma=
ilto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;<br>
<span style=3D"font-weight:bold">Cc: </span>&quot;<a href=3D"mailto:mpls@ie=
tf.org">mpls@ietf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@i=
etf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;=
,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft=
-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draf=
t-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>=
&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [mpls] Review of draft=
-ietf-mpls-residence-time-12<br>
</div>
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div>
<div dir=3D"ltr">Hi Robert,
<div>thank you for the most expedient review and comments. I'll make change=
s in Section 2 per your suggestion.</div>
<div><br>
</div>
<div>Regards,</div>
<div>Greg</div>
</div>
<div class=3D"gmail_extra"><br>
<div class=3D"gmail_quote">On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks =
<span dir=3D"ltr">
&lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nost=
rum.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<div bgcolor=3D"#FFFFFF" text=3D"#000000">
<p>The changes all look good.</p>
<p>I still think you should say something in the document about what &quot;=
the time of packet arrival&quot; and &quot;transmission&quot; means, and ca=
ll out the point you made about being careful to not introduce apparent jit=
ter by not making those measurements consistently. (The
 definitions you point to in your earlier mail from G.8013 don't really hel=
p - they just say &quot;time of packet arrival&quot;. Again, the first and =
last bit are likely to be several nanoseconds apart so I think it matters. =
Perhaps you're saying it doesn't matter as
 long as each node is consistent (there will be error in the residence time=
 measurement, but it will be constant at each node, so the sum of errors wi=
ll be constant, and the clocks will be ok?)</p>
<p>Please look at the new first paragraph of section 2 - there's a mix of &=
quot;as case&quot; and &quot;in case&quot; that should be made consistent. =
I suspect it would be easiest to simply say &quot;referred to as using a on=
e-step clock&quot; and &quot;referred to as using a two-step clock&quot;
 or similar.</p>
<p>RjS<br>
</p>
<div>
<div class=3D"h5"><br>
<div class=3D"m_8583848577547623980moz-cite-prefix">On 1/18/17 12:03 PM, Gr=
eg Mirsky wrote:<br>
</div>
<blockquote type=3D"cite">
<div dir=3D"ltr">Hi Robert,
<div>Sasha Vainshtein came with elegant idea to address disconnection betwe=
en discussion of one-step and two-step modes that you've pointed out. We've=
 moved Section 7 as sub-section into Section 2 now. Attached are updated di=
ff and the proposed new version
 -13.</div>
<div><br>
</div>
<div>Regards,</div>
<div>Greg</div>
</div>
<div class=3D"gmail_extra"><br>
<div class=3D"gmail_quote">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <sp=
an dir=3D"ltr">
&lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@=
gmail.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<div dir=3D"ltr">Hi Robert,
<div>once again, thank you for your thorough review and the most detailed c=
omments. I've prepared updated version and would greatly appreciate if you =
review the changes and let us know whether your comments been addressed. At=
tached are diff and the new version.</div>
<div><br>
</div>
<div>Regards,</div>
<div>Greg</div>
</div>
<div class=3D"gmail_extra"><br>
<div class=3D"gmail_quote"><span>On Wed, Jan 11, 2017 at 7:48 AM, Robert Sp=
arks <span dir=3D"ltr">
&lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nost=
rum.com</a>&gt;</span> wrote:<br>
</span>
<div>
<div class=3D"m_8583848577547623980h5">
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" rel=3D"norefe=
rrer" target=3D"_blank">https://trac.ietf.org/trac/ge<wbr>n/wiki/GenArtfaq<=
/a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time<wbr>-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].<br>
<br>
<br>
<br>
</blockquote>
</div>
</div>
</div>
<br>
</div>
</blockquote>
</div>
<br>
</div>
</blockquote>
<br>
</div>
</div>
</div>
</blockquote>
</div>
<br>
</div>
</div>
</div>
</blockquote>
</span>
</body>
</html>

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From: Uma Chunduri <uma.chunduri@gmail.com>
Date: Thu, 19 Jan 2017 00:31:13 -0800
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Subject: Re: [mpls] Closed -- Working Group last call on draft-ietf-mpls-ldp-mrt
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--94eb2c035a3c30105305466e5bf9
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Sent my comments to authors on this draft  (gone through MRT related
documents after a while!).

--
Uma C.

On Thu, Dec 22, 2016 at 8:10 PM, Loa Andersson <loa@pi.nu> wrote:

> Working Group,
>
> This working group last call is closed. There are support for
> requesting publication, but we also have outstanding comments from Uma.
> The authors should wait for this comments and update as necesary, check
> with Uma if the comments been addressed satisfactorily and post a new
> version.
>
> I will put the draft in "Waiting for WG Chair Go-Ahead" waiting for the
> new version.
>
> /Loa
>
> On 2016-12-07 13:56, Loa Andersson wrote:
>
>> Working Group,
>>
>> This is to initiate a two week working group last call on
>> draft-ietf-mpls-ldp-mrt-04.
>>
>> Please send your comments to the mpls wg mailing list (mpls@ietf.org).
>>
>> There were no IPR disclosures against this document.
>>
>> All the authors and contributors have stated on the working group
>> mailing list that they are not aware of any IPRs that relates to this
>> document.
>>
>> This working group last call ends Dec 22, 2016.
>>
>>
>> /Loa
>> for the MPLS wg chairs
>>
>
> --
>
>
> Loa Andersson                        email: loa@mail01.huawei.com
> Senior MPLS Expert                          loa@pi.nu
> Huawei Technologies (consultant)     phone: +46 739 81 21 64
>
> _______________________________________________
> mpls mailing list
> mpls@ietf.org
> https://www.ietf.org/mailman/listinfo/mpls
>

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<div dir=3D"ltr"><div><br></div>Sent my comments to authors on this draft =
=C2=A0(gone through MRT related documents after a while!).<div><br></div><d=
iv>--</div><div>Uma C.</div></div><div class=3D"gmail_extra"><br><div class=
=3D"gmail_quote">On Thu, Dec 22, 2016 at 8:10 PM, Loa Andersson <span dir=
=3D"ltr">&lt;<a href=3D"mailto:loa@pi.nu" target=3D"_blank">loa@pi.nu</a>&g=
t;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0=
 .8ex;border-left:1px #ccc solid;padding-left:1ex">Working Group,<br>
<br>
This working group last call is closed. There are support for<br>
requesting publication, but we also have outstanding comments from Uma.<br>
The authors should wait for this comments and update as necesary, check<br>
with Uma if the comments been addressed satisfactorily and post a new<br>
version.<br>
<br>
I will put the draft in &quot;Waiting for WG Chair Go-Ahead&quot; waiting f=
or the<br>
new version.<br>
<br>
/Loa<br>
<br>
On 2016-12-07 13:56, Loa Andersson wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Working Group,<br>
<br>
This is to initiate a two week working group last call on<br>
draft-ietf-mpls-ldp-mrt-04.<br>
<br>
Please send your comments to the mpls wg mailing list (<a href=3D"mailto:mp=
ls@ietf.org" target=3D"_blank">mpls@ietf.org</a>).<br>
<br>
There were no IPR disclosures against this document.<br>
<br>
All the authors and contributors have stated on the working group<br>
mailing list that they are not aware of any IPRs that relates to this<br>
document.<br>
<br>
This working group last call ends Dec 22, 2016.<br>
<br>
<br>
/Loa<br>
for the MPLS wg chairs<span class=3D"HOEnZb"><font color=3D"#888888"><br>
</font></span></blockquote><span class=3D"HOEnZb"><font color=3D"#888888">
<br>
-- <br>
<br>
<br>
Loa Andersson=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=
 =C2=A0 =C2=A0 =C2=A0 email: <a href=3D"mailto:loa@mail01.huawei.com" targe=
t=3D"_blank">loa@mail01.huawei.com</a><br>
Senior MPLS Expert=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 <a href=3D"mailto:loa@pi.nu" target=3D"_=
blank">loa@pi.nu</a><br>
Huawei Technologies (consultant)=C2=A0 =C2=A0 =C2=A0phone: <a href=3D"tel:%=
2B46%20739%2081%2021%2064" value=3D"+46739812164" target=3D"_blank">+46 739=
 81 21 64</a><br>
<br>
______________________________<wbr>_________________<br>
mpls mailing list<br>
<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/mpls" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/l<wbr>istinfo/mpls</a><br>
</font></span></blockquote></div><br></div>

--94eb2c035a3c30105305466e5bf9--


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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Thu, 19 Jan 2017 07:44:13 -0800
Message-ID: <CA+RyBmWrDhZUmVN0t8aLsL6F3ZfnvBu8FW_2VjDmwj-ercLd5w@mail.gmail.com>
To: "Acee Lindem (acee)" <acee@cisco.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/keTRNKppLKf1G57HNr2A7w1T_A4>
Cc: "mpls@ietf.org" <mpls@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "Les Ginsberg \(ginsberg\)" <ginsberg@cisco.com>, "gen-art@ietf.org" <gen-art@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, "Abhay Roy \(akr\)" <akr@cisco.com>, Robert Sparks <rjsparks@nostrum.com>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Hi Acee,
the draft defines optional functionality. If an operator has no use neither
for PTP's Transparent Clock, nor RTM itself as performance metric, then RTM
sub-TLV would not be included and thus it would not be flooded. Of course,
it be right to reflect RTM capability through YANG data model, thus
allowing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com> wrote:

> Hi Greg,
>
> Although it is a bit late, we=E2=80=99ve had some discussions amongst the=
 IS-IS
> and OSPF chairs and are wondering whether the interface capability belong=
s
> in the IGPs. This will be flooded throughout the entire routing domain =
=E2=80=93 is
> it really needed on every node or will it the RTM testing be initiated fr=
om
> an omniscient NMS client that would know the capabilities of each node or
> easily query them using YANG?
>
> Thanks,
> Acee
>
> From: mpls <mpls-bounces@ietf.org> on behalf of Greg Mirsky <
> gregimirsky@gmail.com>
> Date: Wednesday, January 18, 2017 at 1:25 PM
> To: Robert Sparks <rjsparks@nostrum.com>
> Cc: "mpls@ietf.org" <mpls@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org=
>,
> "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-
> time.all@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>
> Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
> Hi Robert,
> thank you for the most expedient review and comments. I'll make changes i=
n
> Section 2 per your suggestion.
>
> Regards,
> Greg
>
> On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com>
> wrote:
>
>> The changes all look good.
>>
>> I still think you should say something in the document about what "the
>> time of packet arrival" and "transmission" means, and call out the point
>> you made about being careful to not introduce apparent jitter by not mak=
ing
>> those measurements consistently. (The definitions you point to in your
>> earlier mail from G.8013 don't really help - they just say "time of pack=
et
>> arrival". Again, the first and last bit are likely to be several
>> nanoseconds apart so I think it matters. Perhaps you're saying it doesn'=
t
>> matter as long as each node is consistent (there will be error in the
>> residence time measurement, but it will be constant at each node, so the
>> sum of errors will be constant, and the clocks will be ok?)
>>
>> Please look at the new first paragraph of section 2 - there's a mix of
>> "as case" and "in case" that should be made consistent. I suspect it wou=
ld
>> be easiest to simply say "referred to as using a one-step clock" and
>> "referred to as using a two-step clock" or similar.
>>
>> RjS
>>
>> On 1/18/17 12:03 PM, Greg Mirsky wrote:
>>
>> Hi Robert,
>> Sasha Vainshtein came with elegant idea to address disconnection between
>> discussion of one-step and two-step modes that you've pointed out. We've
>> moved Section 7 as sub-section into Section 2 now. Attached are updated
>> diff and the proposed new version -13.
>>
>> Regards,
>> Greg
>>
>> On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com>
>> wrote:
>>
>>> Hi Robert,
>>> once again, thank you for your thorough review and the most detailed
>>> comments. I've prepared updated version and would greatly appreciate if=
 you
>>> review the changes and let us know whether your comments been addressed=
.
>>> Attached are diff and the new version.
>>>
>>> Regards,
>>> Greg
>>>
>>> On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com>
>>> wrote:
>>>
>>>> Reviewer: Robert Sparks
>>>> Review result: Ready with Nits
>>>>
>>>> I am the assigned Gen-ART reviewer for this draft. The General Area
>>>> Review Team (Gen-ART) reviews all IETF documents being processed
>>>> by the IESG for the IETF Chair.  Please treat these comments just
>>>> like any other last call comments.
>>>>
>>>> For more information, please see the FAQ at
>>>> <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
>>>>
>>>> Document: draft-ietf-mpls-residence-time-12
>>>> Reviewer: Robert Sparks
>>>> Review Date: 2017-01-10
>>>> IETF LC End Date: 2017-01-17
>>>> IESG Telechat date: 2017-02-02
>>>>
>>>> Summary: Ready (with nits) for publication as a Proposed Standard
>>>>
>>>> I have two primary comments. I expect both are rooted in the authors
>>>> and working group knowing what the document means instead of seeing
>>>> what
>>>> it says or doesn't say:
>>>>
>>>> 1) The document is loose with its use of 'packet', and where TTLs
>>>> appear when
>>>> they are discussed. It might be helpful to rephrase the text that
>>>> speaks
>>>> of RTM packets in terms of RTM messages that are encoded as G-ACh
>>>> messages and
>>>> not refer to packets unless you mean the whole encapsulated packet
>>>> with MPLS
>>>> header, ACH, and G-ACh message.
>>>>
>>>> 2) Since this new mechanic speaks in terms of fractional nanoseconds,
>>>> some
>>>> discussion of what trigger-point you intend people to use for taking
>>>> the
>>>> precise time of a packet's arrival or departure seems warranted. (The
>>>> first and
>>>> last bit of the whole encapsulated packet above are going to appear at
>>>> the
>>>> physical layer many nanoseconds apart at OC192 speeds if I've done the
>>>> math
>>>> right). It may be obvious to the folks discussing this, but it's not
>>>> obvious
>>>> from the document.  If it's _not_ obvious and variation in technique
>>>> is
>>>> expected, then some discussion about issues that might arise from
>>>> different
>>>> implementation choices would be welcome.
>>>>
>>>> The rest of these are editorial nits:
>>>>
>>>> It would help to pull an overview description of the difference
>>>> between
>>>> one-step and two-step much earlier in the document. I suggest in the
>>>> overview
>>>> in section 2. Otherwise, the reader really has to jump forward and
>>>> read section
>>>> 7 before section 3's 5th bullet makes any sense.
>>>>
>>>> In section 3, "IANA will be asked" should be made active. Say "This
>>>> document
>>>> asks IANA to" and point to the IANA consideration section. Apply
>>>> similar
>>>> treatment to the other places where you talk about future IANA
>>>> actions.
>>>>
>>>> There are several places where there are missing words (typically
>>>> articles or
>>>> prepositions). You're less likely to end up with misinterpretations
>>>> during the
>>>> RFC Editor phase if you provide them before the document gets that far
>>>> in the
>>>> process. The spots I found most disruptive were these (this is not
>>>> intended to
>>>> be exhaustive):
>>>>
>>>>   Section 3: "set 1 according" -> "set to 1 according"
>>>>   Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
>>>>   Section 4.2: "Detailed discussion of ... modes in Section 7."
>>>>                         -> "Detailed discussion of ... modes appears
>>>> in Section 7."
>>>>   Section 10: "most of" -> "most of all"
>>>>
>>>> In Setion 3.1 at "identity of the source port", please point into the
>>>> document
>>>> that defines this identity and its representation. I suspect this is a
>>>> pointer
>>>> into a specific section in IEEE.1588.2008].
>>>>
>>>>
>>>>
>>>>
>>>
>>
>>
>

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Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Acee,<div>the draft defines optional functionality. If =
an operator has no use neither for PTP&#39;s Transparent Clock, nor RTM its=
elf as performance metric, then RTM sub-TLV would not be included and thus =
it would not be flooded. Of course, it be right to reflect RTM capability t=
hrough YANG data model, thus allowing SDN scenario you&#39;ve described.</d=
iv><div><br></div><div>Regards,</div><div>Greg</div></div><div class=3D"gma=
il_extra"><br><div class=3D"gmail_quote">On Wed, Jan 18, 2017 at 2:51 PM, A=
cee Lindem (acee) <span dir=3D"ltr">&lt;<a href=3D"mailto:acee@cisco.com" t=
arget=3D"_blank">acee@cisco.com</a>&gt;</span> wrote:<br><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex">



<div style=3D"word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-fam=
ily:Calibri,sans-serif">
<div>Hi Greg,=C2=A0</div>
<div><br>
</div>
<div>Although it is a bit late, we=E2=80=99ve had some discussions amongst =
the IS-IS and OSPF chairs and are wondering whether the interface capabilit=
y belongs in the IGPs. This will be flooded throughout the entire routing d=
omain =E2=80=93 is it really needed on every node
 or will it the RTM testing be initiated from an omniscient NMS client that=
 would know the capabilities of each node or easily query them using YANG?=
=C2=A0</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Acee =C2=A0</div>
<div><br>
</div>
<span id=3D"m_-4440083661747761180OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri;font-size:11pt;text-align:left;color:blac=
k;BORDER-BOTTOM:medium none;BORDER-LEFT:medium none;PADDING-BOTTOM:0in;PADD=
ING-LEFT:0in;PADDING-RIGHT:0in;BORDER-TOP:#b5c4df 1pt solid;BORDER-RIGHT:me=
dium none;PADDING-TOP:3pt">
<span style=3D"font-weight:bold">From: </span>mpls &lt;<a href=3D"mailto:mp=
ls-bounces@ietf.org" target=3D"_blank">mpls-bounces@ietf.org</a>&gt; on beh=
alf of Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_=
blank">gregimirsky@gmail.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Wednesday, January 18, 2017 a=
t 1:25 PM<br>
<span style=3D"font-weight:bold">To: </span>Robert Sparks &lt;<a href=3D"ma=
ilto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.com</a>&gt;<b=
r>
<span style=3D"font-weight:bold">Cc: </span>&quot;<a href=3D"mailto:mpls@ie=
tf.org" target=3D"_blank">mpls@ietf.org</a>&quot; &lt;<a href=3D"mailto:mpl=
s@ietf.org" target=3D"_blank">mpls@ietf.org</a>&gt;, &quot;<a href=3D"mailt=
o:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>&quot; &lt;<a hre=
f=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-<wbr>time.all@ietf.org</a>&quot; &lt=
;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">draft-ietf-mpls-residence-<wbr>time.all@ietf.org</a>&gt;, &quot;<a h=
ref=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [mpls] Review of draft=
-ietf-mpls-residence-<wbr>time-12<br>
</div><div><div class=3D"h5">
<div><br>
</div>
<blockquote id=3D"m_-4440083661747761180MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE"=
 style=3D"BORDER-LEFT:#b5c4df 5 solid;PADDING:0 0 0 5;MARGIN:0 0 0 5">
<div>
<div>
<div dir=3D"ltr">Hi Robert,
<div>thank you for the most expedient review and comments. I&#39;ll make ch=
anges in Section 2 per your suggestion.</div>
<div><br>
</div>
<div>Regards,</div>
<div>Greg</div>
</div>
<div class=3D"gmail_extra"><br>
<div class=3D"gmail_quote">On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks =
<span dir=3D"ltr">
&lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nost=
rum.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<div bgcolor=3D"#FFFFFF" text=3D"#000000">
<p>The changes all look good.</p>
<p>I still think you should say something in the document about what &quot;=
the time of packet arrival&quot; and &quot;transmission&quot; means, and ca=
ll out the point you made about being careful to not introduce apparent jit=
ter by not making those measurements consistently. (The
 definitions you point to in your earlier mail from G.8013 don&#39;t really=
 help - they just say &quot;time of packet arrival&quot;. Again, the first =
and last bit are likely to be several nanoseconds apart so I think it matte=
rs. Perhaps you&#39;re saying it doesn&#39;t matter as
 long as each node is consistent (there will be error in the residence time=
 measurement, but it will be constant at each node, so the sum of errors wi=
ll be constant, and the clocks will be ok?)</p>
<p>Please look at the new first paragraph of section 2 - there&#39;s a mix =
of &quot;as case&quot; and &quot;in case&quot; that should be made consiste=
nt. I suspect it would be easiest to simply say &quot;referred to as using =
a one-step clock&quot; and &quot;referred to as using a two-step clock&quot=
;
 or similar.</p>
<p>RjS<br>
</p>
<div>
<div class=3D"m_-4440083661747761180h5"><br>
<div class=3D"m_-4440083661747761180m_8583848577547623980moz-cite-prefix">O=
n 1/18/17 12:03 PM, Greg Mirsky wrote:<br>
</div>
<blockquote type=3D"cite">
<div dir=3D"ltr">Hi Robert,
<div>Sasha Vainshtein came with elegant idea to address disconnection betwe=
en discussion of one-step and two-step modes that you&#39;ve pointed out. W=
e&#39;ve moved Section 7 as sub-section into Section 2 now. Attached are up=
dated diff and the proposed new version
 -13.</div>
<div><br>
</div>
<div>Regards,</div>
<div>Greg</div>
</div>
<div class=3D"gmail_extra"><br>
<div class=3D"gmail_quote">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <sp=
an dir=3D"ltr">
&lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@=
gmail.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<div dir=3D"ltr">Hi Robert,
<div>once again, thank you for your thorough review and the most detailed c=
omments. I&#39;ve prepared updated version and would greatly appreciate if =
you review the changes and let us know whether your comments been addressed=
. Attached are diff and the new version.</div>
<div><br>
</div>
<div>Regards,</div>
<div>Greg</div>
</div>
<div class=3D"gmail_extra"><br>
<div class=3D"gmail_quote"><span>On Wed, Jan 11, 2017 at 7:48 AM, Robert Sp=
arks <span dir=3D"ltr">
&lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nost=
rum.com</a>&gt;</span> wrote:<br>
</span>
<div>
<div class=3D"m_-4440083661747761180m_8583848577547623980h5">
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.=C2=A0 Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" rel=3D"norefe=
rrer" target=3D"_blank">https://trac.ietf.org/trac/ge<wbr>n/wiki/GenArtfaq<=
/a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time<wbr>-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn&#39;t say:<br>
<br>
1) The document is loose with its use of &#39;packet&#39;, and where TTLs<b=
r>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet&#39;s arrival or departure seems warranted. (The<b=
r>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I&#39;ve done the<=
br>
math<br>
right). It may be obvious to the folks discussing this, but it&#39;s not<br=
>
obvious<br>
from the document.=C2=A0 If it&#39;s _not_ obvious and variation in techniq=
ue<br>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3&#39;s 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You&#39;re less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
=C2=A0 Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
=C2=A0 Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
=C2=A0 Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
=C2=A0 Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].<br>
<br>
<br>
<br>
</blockquote>
</div>
</div>
</div>
<br>
</div>
</blockquote>
</div>
<br>
</div>
</blockquote>
<br>
</div>
</div>
</div>
</blockquote>
</div>
<br>
</div>
</div>
</div>
</blockquote>
</div></div></span>
</div>

</blockquote></div><br></div>

--001a113ce9bcc12b4005467467dc--


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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Thu, 19 Jan 2017 08:00:30 -0800
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To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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--001a11353282f6e0dc054674a114
Content-Type: text/plain; charset=UTF-8
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Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m
> wrote:

> Greg =E2=80=93
>
>
>
> I am having trouble understanding your response.
>
> The question we are raising is whether we should extend the IGPs to
> support advertising RTM capability =E2=80=93 an alternative being to retr=
ieve the
> capability via network management.
>
>
>
> Saying that the IGP functionality is optional and/or wouldn=E2=80=99t alw=
ays be
> advertised doesn=E2=80=99t really answer the question of whether we shoul=
d or
> should not define the IGP extensions.
>
>
>
> Could you respond more directly to this point?
>
>
>
>    Les
>
>
>
>
>
> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com]
> *Sent:* Thursday, January 19, 2017 7:44 AM
> *To:* Acee Lindem (acee)
> *Cc:* Robert Sparks; mpls@ietf.org; gen-art@ietf.org;
> draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org; Les Ginsberg
> (ginsberg); isis-chairs@ietf.org; Abhay Roy (akr)
>
> *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>
>
> Hi Acee,
>
> the draft defines optional functionality. If an operator has no use
> neither for PTP's Transparent Clock, nor RTM itself as performance metric=
,
> then RTM sub-TLV would not be included and thus it would not be flooded. =
Of
> course, it be right to reflect RTM capability through YANG data model, th=
us
> allowing SDN scenario you've described.
>
>
>
> Regards,
>
> Greg
>
>
>
> On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com>
> wrote:
>
> Hi Greg,
>
>
>
> Although it is a bit late, we=E2=80=99ve had some discussions amongst the=
 IS-IS
> and OSPF chairs and are wondering whether the interface capability belong=
s
> in the IGPs. This will be flooded throughout the entire routing domain =
=E2=80=93 is
> it really needed on every node or will it the RTM testing be initiated fr=
om
> an omniscient NMS client that would know the capabilities of each node or
> easily query them using YANG?
>
>
>
> Thanks,
>
> Acee
>
>
>
> *From: *mpls <mpls-bounces@ietf.org> on behalf of Greg Mirsky <
> gregimirsky@gmail.com>
> *Date: *Wednesday, January 18, 2017 at 1:25 PM
> *To: *Robert Sparks <rjsparks@nostrum.com>
> *Cc: *"mpls@ietf.org" <mpls@ietf.org>, "gen-art@ietf.org" <
> gen-art@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <
> draft-ietf-mpls-residence-time.all@ietf.org>, "ietf@ietf.org" <
> ietf@ietf.org>
> *Subject: *Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>
>
> Hi Robert,
>
> thank you for the most expedient review and comments. I'll make changes i=
n
> Section 2 per your suggestion.
>
>
>
> Regards,
>
> Greg
>
>
>
> On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com>
> wrote:
>
> The changes all look good.
>
> I still think you should say something in the document about what "the
> time of packet arrival" and "transmission" means, and call out the point
> you made about being careful to not introduce apparent jitter by not maki=
ng
> those measurements consistently. (The definitions you point to in your
> earlier mail from G.8013 don't really help - they just say "time of packe=
t
> arrival". Again, the first and last bit are likely to be several
> nanoseconds apart so I think it matters. Perhaps you're saying it doesn't
> matter as long as each node is consistent (there will be error in the
> residence time measurement, but it will be constant at each node, so the
> sum of errors will be constant, and the clocks will be ok?)
>
> Please look at the new first paragraph of section 2 - there's a mix of "a=
s
> case" and "in case" that should be made consistent. I suspect it would be
> easiest to simply say "referred to as using a one-step clock" and "referr=
ed
> to as using a two-step clock" or similar.
>
> RjS
>
>
>
> On 1/18/17 12:03 PM, Greg Mirsky wrote:
>
> Hi Robert,
>
> Sasha Vainshtein came with elegant idea to address disconnection between
> discussion of one-step and two-step modes that you've pointed out. We've
> moved Section 7 as sub-section into Section 2 now. Attached are updated
> diff and the proposed new version -13.
>
>
>
> Regards,
>
> Greg
>
>
>
> On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com>
> wrote:
>
> Hi Robert,
>
> once again, thank you for your thorough review and the most detailed
> comments. I've prepared updated version and would greatly appreciate if y=
ou
> review the changes and let us know whether your comments been addressed.
> Attached are diff and the new version.
>
>
>
> Regards,
>
> Greg
>
>
>
> On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com>
> wrote:
>
> Reviewer: Robert Sparks
> Review result: Ready with Nits
>
> I am the assigned Gen-ART reviewer for this draft. The General Area
> Review Team (Gen-ART) reviews all IETF documents being processed
> by the IESG for the IETF Chair.  Please treat these comments just
> like any other last call comments.
>
> For more information, please see the FAQ at
> <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
>
> Document: draft-ietf-mpls-residence-time-12
> Reviewer: Robert Sparks
> Review Date: 2017-01-10
> IETF LC End Date: 2017-01-17
> IESG Telechat date: 2017-02-02
>
> Summary: Ready (with nits) for publication as a Proposed Standard
>
> I have two primary comments. I expect both are rooted in the authors
> and working group knowing what the document means instead of seeing
> what
> it says or doesn't say:
>
> 1) The document is loose with its use of 'packet', and where TTLs
> appear when
> they are discussed. It might be helpful to rephrase the text that
> speaks
> of RTM packets in terms of RTM messages that are encoded as G-ACh
> messages and
> not refer to packets unless you mean the whole encapsulated packet
> with MPLS
> header, ACH, and G-ACh message.
>
> 2) Since this new mechanic speaks in terms of fractional nanoseconds,
> some
> discussion of what trigger-point you intend people to use for taking
> the
> precise time of a packet's arrival or departure seems warranted. (The
> first and
> last bit of the whole encapsulated packet above are going to appear at
> the
> physical layer many nanoseconds apart at OC192 speeds if I've done the
> math
> right). It may be obvious to the folks discussing this, but it's not
> obvious
> from the document.  If it's _not_ obvious and variation in technique
> is
> expected, then some discussion about issues that might arise from
> different
> implementation choices would be welcome.
>
> The rest of these are editorial nits:
>
> It would help to pull an overview description of the difference
> between
> one-step and two-step much earlier in the document. I suggest in the
> overview
> in section 2. Otherwise, the reader really has to jump forward and
> read section
> 7 before section 3's 5th bullet makes any sense.
>
> In section 3, "IANA will be asked" should be made active. Say "This
> document
> asks IANA to" and point to the IANA consideration section. Apply
> similar
> treatment to the other places where you talk about future IANA
> actions.
>
> There are several places where there are missing words (typically
> articles or
> prepositions). You're less likely to end up with misinterpretations
> during the
> RFC Editor phase if you provide them before the document gets that far
> in the
> process. The spots I found most disruptive were these (this is not
> intended to
> be exhaustive):
>
>   Section 3: "set 1 according" -> "set to 1 according"
>   Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
>   Section 4.2: "Detailed discussion of ... modes in Section 7."
>                         -> "Detailed discussion of ... modes appears
> in Section 7."
>   Section 10: "most of" -> "most of all"
>
> In Setion 3.1 at "identity of the source port", please point into the
> document
> that defines this identity and its representation. I suspect this is a
> pointer
> into a specific section in IEEE.1588.2008].
>
>
>
>
>
>
>
>
>
>
>
>

--001a11353282f6e0dc054674a114
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Les,<div>I believe that IGP extensions to advertise RTM=
 capability are required.</div><div><br></div><div>Regards,</div><div>Greg<=
/div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Thu=
, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <span dir=3D"ltr">&lt;<a=
 href=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@cisco.com</a=
>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 =
0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_3295676440435625155WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Greg =E2=80=93<u></u><u><=
/u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">I am having trouble under=
standing your response.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">The question we are raisi=
ng is whether we should extend the IGPs to support advertising RTM capabili=
ty =E2=80=93 an alternative being to retrieve the capability via
 network management.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Saying that the IGP funct=
ionality is optional and/or wouldn=E2=80=99t always be advertised doesn=E2=
=80=99t really answer the question of whether we should or should not defin=
e
 the IGP extensions.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Could you respond more di=
rectly to this point?<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 Les<u></u><u=
></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Greg Mir=
sky [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">greg=
imirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>; <a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">=
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org" target=3D"_blank">draft-ietf-mpls-residence-<wbr>time.all@ietf.or=
g</a>; <a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>=
; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@ietf.org" target=
=3D"_blank">isis-chairs@ietf.org</a>; Abhay Roy (akr)</span></p><div><div c=
lass=3D"h5"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-<wbr>time-12=
<u></u><u></u></div></div><p></p>
</div>
</div><div><div class=3D"h5">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">Hi Acee,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">the draft defines optional functionality. If an oper=
ator has no use neither for PTP&#39;s Transparent Clock, nor RTM itself as =
performance metric, then RTM sub-TLV would not be included and thus it woul=
d not be flooded. Of course, it be right
 to reflect RTM capability through YANG data model, thus allowing SDN scena=
rio you&#39;ve described.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Regards,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Greg<u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) =
&lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@cisco.com</a>&=
gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi Greg,=C2=A0<u></u><u></u=
></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><u></u>=C2=A0<u></u></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Although it is a bit late, =
we=E2=80=99ve had some discussions amongst the IS-IS and OSPF chairs and ar=
e wondering whether the interface capability belongs in the IGPs.
 This will be flooded throughout the entire routing domain =E2=80=93 is it =
really needed on every node or will it the RTM testing be initiated from an=
 omniscient NMS client that would know the capabilities of each node or eas=
ily query them using YANG?=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><u></u>=C2=A0<u></u></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thanks,<u></u><u></u></span=
></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Acee =C2=A0<u></u><u></u></=
span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><u></u>=C2=A0<u></u></span>=
</p>
</div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces=
@ietf.org" target=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Gre=
g Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gre=
gimirsky@gmail.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-<wbr>time.all@ietf.org</a>&quot; &lt=
;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">draft-ietf-mpls-residence-<wbr>time.all@ietf.org</a>&gt;, &quot;<a h=
ref=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-<wbr>time-12=
<u></u><u></u></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><u></u>=C2=A0<u></u></span>=
</p>
</div>
<blockquote style=3D"border:none;border-left:solid #b5c4df 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-right:0in" id=3D"m_32956764404356=
25155m_-4440083661747761180MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi Robert,
<u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">thank you for the most expe=
dient review and comments. I&#39;ll make changes in Section 2 per your sugg=
estion.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><u></u>=C2=A0<u></u></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Regards,<u></u><u></u></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Greg<u></u><u></u></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><u></u>=C2=A0<u></u></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">On Wed, Jan 18, 2017 at 10:=
34 AM, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"=
_blank">rjsparks@nostrum.com</a>&gt; wrote:<u></u><u></u></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">The changes all look good.<u></u><u></u></span>=
</p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">I still think you should say something in the d=
ocument about what &quot;the time of packet arrival&quot; and &quot;transmi=
ssion&quot; means, and call out the point you made about being careful to
 not introduce apparent jitter by not making those measurements consistentl=
y. (The definitions you point to in your earlier mail from G.8013 don&#39;t=
 really help - they just say &quot;time of packet arrival&quot;. Again, the=
 first and last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you&#39;re saying it doesn&#39;t matt=
er as long as each node is consistent (there will be error in the residence=
 time measurement, but it will be constant at each node, so the sum of erro=
rs will be constant, and the clocks will
 be ok?)<u></u><u></u></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">Please look at the new first paragraph of secti=
on 2 - there&#39;s a mix of &quot;as case&quot; and &quot;in case&quot; tha=
t should be made consistent. I suspect it would be easiest to simply say &q=
uot;referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.<u></u><u></u></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">RjS<u></u><u></u></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><u></u>=C2=A0<u></u></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">On 1/18/17 12:03 PM, Greg M=
irsky wrote:<u></u><u></u></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi Robert,
<u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Sasha Vainshtein came with =
elegant idea to address disconnection between discussion of one-step and tw=
o-step modes that you&#39;ve pointed out. We&#39;ve moved Section
 7 as sub-section into Section 2 now. Attached are updated diff and the pro=
posed new version -13.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><u></u>=C2=A0<u></u></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Regards,<u></u><u></u></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Greg<u></u><u></u></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><u></u>=C2=A0<u></u></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">On Wed, Jan 18, 2017 at 8:1=
3 AM, Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_b=
lank">gregimirsky@gmail.com</a>&gt; wrote:<u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi Robert,
<u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">once again, thank you for y=
our thorough review and the most detailed comments. I&#39;ve prepared updat=
ed version and would greatly appreciate if you review the changes
 and let us know whether your comments been addressed. Attached are diff an=
d the new version.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><u></u>=C2=A0<u></u></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Regards,<u></u><u></u></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Greg<u></u><u></u></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><u></u>=C2=A0<u></u></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">On Wed, Jan 11, 2017 at 7:4=
8 AM, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_=
blank">rjsparks@nostrum.com</a>&gt; wrote:<u></u><u></u></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:bla=
ck">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.=C2=A0 Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/<wbr>gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-<wbr>time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn&#39;t say:<br>
<br>
1) The document is loose with its use of &#39;packet&#39;, and where TTLs<b=
r>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet&#39;s arrival or departure seems warranted. (The<b=
r>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I&#39;ve done the<=
br>
math<br>
right). It may be obvious to the folks discussing this, but it&#39;s not<br=
>
obvious<br>
from the document.=C2=A0 If it&#39;s _not_ obvious and variation in techniq=
ue<br>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3&#39;s 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You&#39;re less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
=C2=A0 Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
=C2=A0 Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
=C2=A0 Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
=C2=A0 Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].<br>
<br>
<br>
<u></u><u></u></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><u></u>=C2=A0<u></u></span>=
</p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><u></u>=C2=A0<u></u></span>=
</p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><u></u>=C2=A0<u></u></span>=
</p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><u></u>=C2=A0<u></u></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div></div></div>
</div>
</div>

</blockquote></div><br></div>

--001a11353282f6e0dc054674a114--


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From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
To: Greg Mirsky <gregimirsky@gmail.com>, "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Date: Thu, 19 Jan 2017 16:15:39 +0000
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Cc: "mpls@ietf.org" <mpls@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, "Abhay Roy \(akr\)" <akr@cisco.com>, Robert Sparks <rjsparks@nostrum.com>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>, "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg =96

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability =96 an alternative being to retrieve the capabi=
lity via network management.

Saying that the IGP functionality is optional and/or wouldn=92t always be a=
dvertised doesn=92t really answer the question of whether we should or shou=
ld not define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we=92ve had some discussions amongst the IS-IS a=
nd OSPF chairs and are wondering whether the interface capability belongs i=
n the IGPs. This will be flooded throughout the entire routing domain =96 i=
s it really needed on every node or will it the RTM testing be initiated fr=
om an omniscient NMS client that would know the capabilities of each node o=
r easily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].








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e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div>I guess what we were trying to envision the use case and whether it ma=
kes sense for all the nodes in the IGP routing domain to have this informat=
ion. Would the LSP ingress LSR only need to if the egress LSR supports RTM =
and it is best effort recording
 for transit LSRs in the path? &nbsp;</div>
<div><br>
</div>
<div>Additionally, if it is needed in the IGPs, should there also be a BGP-=
LS Link Attribute TLV proposed?&nbsp;</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Acee&nbsp;</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
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<span style=3D"font-weight:bold">From: </span>Alexander Vainshtein &lt;<a h=
ref=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitel=
e.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Thursday, January 19, 2017 at=
 10:15 AM<br>
<span style=3D"font-weight:bold">To: </span>Greg Mirsky &lt;<a href=3D"mail=
to:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;, &quot;Les Ginsberg=
 (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.=
com</a>&gt;<br>
<span style=3D"font-weight:bold">Cc: </span>Acee Lindem &lt;<a href=3D"mail=
to:acee@cisco.com">acee@cisco.com</a>&gt;, Robert Sparks &lt;<a href=3D"mai=
lto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;, &quot;<a href=3D"ma=
ilto:mpls@ietf.org">mpls@ietf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf=
.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>RE: [mpls] Review of draft=
-ietf-mpls-residence-time-12<br>
</div>
<div><br>
</div>
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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Hi all,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">I concur with Greg: from my POV an in=
teroperable solution should not depend on an omniscient NMS client distribu=
ting information about capabilities of each node
 to each other node. <o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Sasha<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Office: &#43;972-39266302<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &=
#43;972-549266302<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Greg Mirsky [<a href=3D"mailto=
:gregimirsky@gmail.com">mailto:gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal">Hi Les,<o:p></o:p></p>
<div>
<p class=3D"MsoNormal">I believe that IGP extensions to advertise RTM capab=
ility are required.<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">Regards,<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">Greg<o:p></o:p></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal">On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsb=
erg) &lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@c=
isco.com</a>&gt; wrote:<o:p></o:p></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Greg =96</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">I am having trouble understanding your response.</s=
pan><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The question we are raising is whether we should ex=
tend the IGPs to support advertising RTM capability
 =96 an alternative being to retrieve the capability via network management=
.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Saying that the IGP functionality is optional and/o=
r wouldn=92t always be advertised doesn=92t really answer
 the question of whether we should or should not define the IGP extensions.=
</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Could you respond more directly to this point?</spa=
n><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp; Les</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif">From:</span></b><span style=3D"font-size:10.0pt;font-family:&qu=
ot;Tahoma&quot;,sans-serif"> Greg Mirsky [mailto:<a href=3D"mailto:gregimir=
sky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><o:p></o:p></p>
<div>
<div>
<p class=3D"MsoNormal"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">&nbsp;<o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">Hi Acee,<o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">the draft defines optional functionality. If an operator has no us=
e neither for PTP's Transparent Clock, nor RTM itself as performance metric=
, then RTM sub-TLV would not be included
 and thus it would not be flooded. Of course, it be right to reflect RTM ca=
pability through YANG data model, thus allowing SDN scenario you've describ=
ed.<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">Regards,<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">Greg<o:p></o:p></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">&nbsp;<o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) &lt;<a href=3D=
"mailto:acee@cisco.com" target=3D"_blank">acee@cisco.com</a>&gt; wrote:<o:p=
></o:p></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Greg,&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Although it is a bit late, we=92ve had some discussio=
ns amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain =96 is it really needed on every node=
 or will it the RTM testing be initiated from an omniscient NMS client that=
 would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Thanks,</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Acee &nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces@ietf.org" t=
arget=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Greg Mirsky &lt=
;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gma=
il.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><o:p></o:p></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">thank you for the most expedient review and comments.=
 I'll make changes in Section 2 per your suggestion.</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><o:p></o:p></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks &lt;<=
a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.c=
om</a>&gt;
 wrote:</span><o:p></o:p></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">The changes all look good.</span><o:p></o:p></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">I still think you should say something in the document abou=
t what &quot;the time of packet arrival&quot; and &quot;transmission&quot; =
means, and call out the point you made about being careful to not
 introduce apparent jitter by not making those measurements consistently. (=
The definitions you point to in your earlier mail from G.8013 don't really =
help - they just say &quot;time of packet arrival&quot;. Again, the first a=
nd last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><o:p></o:p></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Please look at the new first paragraph of section 2 - there=
's a mix of &quot;as case&quot; and &quot;in case&quot; that should be made=
 consistent. I suspect it would be easiest to simply say &quot;referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><o:p></o:p></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">RjS</span><o:p></o:p></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</span><o:p></=
o:p></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Sasha Vainshtein came with elegant idea to address di=
sconnection between discussion of one-step and two-step
 modes that you've pointed out. We've moved Section 7 as sub-section into S=
ection 2 now. Attached are updated diff and the proposed new version -13.</=
span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><o:p></o:p></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.co=
m</a>&gt;
 wrote:</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">once again, thank you for your thorough review and th=
e most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><o:p></o:p></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks &lt;<a=
 href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.co=
m</a>&gt;
 wrote:</span><o:p></o:p></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].<br>
<br>
</span><o:p></o:p></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">&nbsp;<o:p></o:p></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</div>
</div>
</div>
</blockquote>
</span>
</body>
</html>

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From: John E Drake <jdrake@juniper.net>
To: "Acee Lindem (acee)" <acee@cisco.com>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>, "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Cc: "Abhay Roy \(akr\)" <akr@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, Robert Sparks <rjsparks@nostrum.com>, "ietf@ietf.org" <ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>; Greg Mirsky <g=
regimirsky@gmail.com>; Les Ginsberg (ginsberg) <ginsberg@cisco.com>
Cc: Robert Sparks <rjsparks@nostrum.com>; mpls@ietf.org; gen-art@ietf.org; =
draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org; isis-chairs@iet=
f.org; Abhay Roy (akr) <akr@cisco.com>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].









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</head>
<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We discussed all of this with you ove=
r a year ago and used your guidance in adding the indication of RTM capabil=
ity to OSPF.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Acee Lindem (acee) [mailto:ace=
e@cisco.com]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;Alexander.Vainshtein@ecitele.com&gt;; G=
reg Mirsky &lt;gregimirsky@gmail.com&gt;; Les Ginsberg (ginsberg) &lt;ginsb=
erg@cisco.com&gt;<br>
<b>Cc:</b> Robert Sparks &lt;rjsparks@nostrum.com&gt;; mpls@ietf.org; gen-a=
rt@ietf.org; draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org; is=
is-chairs@ietf.org; Abhay Roy (akr) &lt;akr@cisco.com&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I guess what we were trying to envision=
 the use case and whether it makes sense for all the nodes in the IGP routi=
ng domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;<o:p></o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Additionally, if it is needed in the IG=
Ps, should there also be a BGP-LS Link Attribute TLV proposed?&nbsp;<o:p></=
o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Alexander Vainshtein &lt;<a href=3D"mailto:Alexande=
r.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-right:0in" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Hi all,</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">I concur with Greg: from my POV an in=
teroperable solution should not depend on an omniscient NMS client distribu=
ting information about capabilities of each node
 to each other node. </span><span style=3D"color:black"><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Regards,</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Sasha</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Office: &#43;972-39266302</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &=
#43;972-549266302</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Greg M=
irsky [<a href=3D"mailto:gregimirsky@gmail.com">mailto:gregimirsky@gmail.co=
m</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Greg &#8211;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">I am having trouble understanding your response.</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The question we are raising is whether we should ex=
tend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Saying that the IGP functionality is optional and/o=
r wouldn&#8217;t always be advertised doesn&#8217;t really answer
 the question of whether we should or should not define the IGP extensions.=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Could you respond more directly to this point?</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black">From:</span></b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black"> Greg Mirsky
 [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimi=
rsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Greg,&nbsp;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Although it is a bit late, we&#8217;ve had some discu=
ssions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Thanks,</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Acee &nbsp;</span><span style=3D"color:black"><o:p></=
o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces@ietf.org" t=
arget=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Greg Mirsky &lt=
;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gma=
il.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">thank you for the most expedient review and comments.=
 I'll make changes in Section 2 per your suggestion.</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks &lt;<=
a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.c=
om</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">The changes all look good.</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">I still think you should say something in the document abou=
t what &quot;the time of packet arrival&quot; and &quot;transmission&quot; =
means, and call out the point you made about being careful to not
 introduce apparent jitter by not making those measurements consistently. (=
The definitions you point to in your earlier mail from G.8013 don't really =
help - they just say &quot;time of packet arrival&quot;. Again, the first a=
nd last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Please look at the new first paragraph of section 2 - there=
's a mix of &quot;as case&quot; and &quot;in case&quot; that should be made=
 consistent. I suspect it would be easiest to simply say &quot;referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">RjS</span><span style=3D"color:black"><o:p></o:p></span></p=
>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</span><span s=
tyle=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Sasha Vainshtein came with elegant idea to address di=
sconnection between discussion of one-step and two-step
 modes that you've pointed out. We've moved Section 7 as sub-section into S=
ection 2 now. Attached are updated diff and the proposed new version -13.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">once again, thank you for your thorough review and th=
e most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks &lt;<a=
 href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].<br>
<br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</body>
</html>

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From: "Acee Lindem (acee)" <acee@cisco.com>
To: John E Drake <jdrake@juniper.net>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>, "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Date: Thu, 19 Jan 2017 16:47:10 +0000
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Cc: "Abhay Roy \(akr\)" <akr@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, Robert Sparks <rjsparks@nostrum.com>, "ietf@ietf.org" <ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I=92m sorry but I focused mainly on the OSPF protocol aspects then and didn=
=92t question the use case. This question came up in the IS-IS WG discussio=
ns.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg =96

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability =96 an alternative being to retrieve the capabi=
lity via network management.

Saying that the IGP functionality is optional and/or wouldn=92t always be a=
dvertised doesn=92t really answer the question of whether we should or shou=
ld not define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we=92ve had some discussions amongst the IS-IS a=
nd OSPF chairs and are wondering whether the interface capability belongs i=
n the IGPs. This will be flooded throughout the entire routing domain =96 i=
s it really needed on every node or will it the RTM testing be initiated fr=
om an omniscient NMS client that would know the capabilities of each node o=
r easily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].









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e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div>Hi John,&nbsp;</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
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 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>John E Drake &lt;<a href=3D"m=
ailto:jdrake@juniper.net">jdrake@juniper.net</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Thursday, January 19, 2017 at=
 10:43 AM<br>
<span style=3D"font-weight:bold">To: </span>Acee Lindem &lt;<a href=3D"mail=
to:acee@cisco.com">acee@cisco.com</a>&gt;, Alexander Vainshtein &lt;<a href=
=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.c=
om</a>&gt;, Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregim=
irsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Cc: </span>Robert Sparks &lt;<a href=3D"ma=
ilto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;, &quot;<a href=3D"m=
ailto:mpls@ietf.org">mpls@ietf.org</a>&quot; &lt;<a href=3D"mailto:mpls@iet=
f.org">mpls@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org">gen=
-art@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a=
 href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpl=
s-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mp=
ls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org=
</a>&gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>RE: [mpls] Review of draft=
-ietf-mpls-residence-time-12<br>
</div>
<div><br>
</div>
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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We discussed all of this with you ove=
r a year ago and used your guidance in adding the indication of RTM capabil=
ity to OSPF.</span></p>
</div>
</div>
</div>
</blockquote>
</span>
<div><br>
</div>
<div>I=92m sorry but I focused mainly on the OSPF protocol aspects then and=
 didn=92t question the use case. This question came up in the IS-IS WG disc=
ussions.&nbsp;</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Acee</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
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soft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" x=
mlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" xmlns=3D"http:/=
/www.w3.org/TR/REC-html40">
<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Acee Lindem (acee) [<a href=3D=
"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Gin=
sberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.c=
om</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I guess what we were trying to envision=
 the use case and whether it makes sense for all the nodes in the IGP routi=
ng domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;<o:p></o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Additionally, if it is needed in the IG=
Ps, should there also be a BGP-LS Link Attribute TLV proposed?&nbsp;<o:p></=
o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Alexander Vainshtein &lt;<a href=3D"mailto:Alexande=
r.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-right:0in" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Hi all,</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">I concur with Greg: from my POV an in=
teroperable solution should not depend on an omniscient NMS client distribu=
ting information about capabilities of each node
 to each other node. </span><span style=3D"color:black"><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Regards,</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Sasha</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Office: &#43;972-39266302</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &=
#43;972-549266302</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Greg M=
irsky [<a href=3D"mailto:gregimirsky@gmail.com">mailto:gregimirsky@gmail.co=
m</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Greg =96</span><span style=3D"color:black"><o:p></o=
:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">I am having trouble understanding your response.</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The question we are raising is whether we should ex=
tend the IGPs to support advertising RTM capability
 =96 an alternative being to retrieve the capability via network management=
.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Saying that the IGP functionality is optional and/o=
r wouldn=92t always be advertised doesn=92t really answer
 the question of whether we should or should not define the IGP extensions.=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Could you respond more directly to this point?</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black">From:</span></b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black"> Greg Mirsky
 [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimi=
rsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Greg,&nbsp;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Although it is a bit late, we=92ve had some discussio=
ns amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain =96 is it really needed on every node=
 or will it the RTM testing be initiated from an omniscient NMS client that=
 would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Thanks,</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Acee &nbsp;</span><span style=3D"color:black"><o:p></=
o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces@ietf.org" t=
arget=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Greg Mirsky &lt=
;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gma=
il.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">thank you for the most expedient review and comments.=
 I'll make changes in Section 2 per your suggestion.</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks &lt;<=
a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.c=
om</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">The changes all look good.</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">I still think you should say something in the document abou=
t what &quot;the time of packet arrival&quot; and &quot;transmission&quot; =
means, and call out the point you made about being careful to not
 introduce apparent jitter by not making those measurements consistently. (=
The definitions you point to in your earlier mail from G.8013 don't really =
help - they just say &quot;time of packet arrival&quot;. Again, the first a=
nd last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Please look at the new first paragraph of section 2 - there=
's a mix of &quot;as case&quot; and &quot;in case&quot; that should be made=
 consistent. I suspect it would be easiest to simply say &quot;referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">RjS</span><span style=3D"color:black"><o:p></o:p></span></p=
>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</span><span s=
tyle=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Sasha Vainshtein came with elegant idea to address di=
sconnection between discussion of one-step and two-step
 modes that you've pointed out. We've moved Section 7 as sub-section into S=
ection 2 now. Attached are updated diff and the proposed new version -13.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">once again, thank you for your thorough review and th=
e most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks &lt;<a=
 href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].<br>
<br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
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To: "Acee Lindem (acee)" <acee@cisco.com>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>, "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Cc: "Abhay Roy \(akr\)" <akr@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, Robert Sparks <rjsparks@nostrum.com>, "ietf@ietf.org" <ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node's RTM capabil=
ities and distribute them to the other nodes is undefined.  Further, one of=
 the ways by which an omniscient controller learns a node's capabilities is=
 by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net>; Alexander Vainshtein <Alexander.Vain=
shtein@ecitele.com>; Greg Mirsky <gregimirsky@gmail.com>; Les Ginsberg (gin=
sberg) <ginsberg@cisco.com>
Cc: Robert Sparks <rjsparks@nostrum.com>; mpls@ietf.org; gen-art@ietf.org; =
draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org; isis-chairs@iet=
f.org; Abhay Roy (akr) <akr@cisco.com>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I'm sorry but I focused mainly on the OSPF protocol aspects then and didn't=
 question the use case. This question came up in the IS-IS WG discussions.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].










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<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Relying on an omniscient controller i=
s a non-starter in general and in particular because the protocol by which =
it would learn each node&#8217;s RTM capabilities and
 distribute them to the other nodes is undefined.&nbsp; Further, one of the=
 ways by which an omniscient controller learns a node&#8217;s capabilities =
is by snooping the link/state database.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Acee Lindem (acee) [mailto:ace=
e@cisco.com]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;jdrake@juniper.net&gt;; Alexander Vainshtein &l=
t;Alexander.Vainshtein@ecitele.com&gt;; Greg Mirsky &lt;gregimirsky@gmail.c=
om&gt;; Les Ginsberg (ginsberg) &lt;ginsberg@cisco.com&gt;<br>
<b>Cc:</b> Robert Sparks &lt;rjsparks@nostrum.com&gt;; mpls@ietf.org; gen-a=
rt@ietf.org; draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org; is=
is-chairs@ietf.org; Abhay Roy (akr) &lt;akr@cisco.com&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi John,&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">John E Drake &lt;<a href=3D"mailto:jdrake@juniper.n=
et">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@e=
citele.com">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a hr=
ef=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<a hr=
ef=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft=
-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draf=
t-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>=
&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay =
Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<=
br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-right:0in" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We discussed all of this with you ove=
r a year ago and used your guidance in adding the indication of RTM capabil=
ity to OSPF.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I&#8217;m sorry but I focused mainly on=
 the OSPF protocol aspects then and didn&#8217;t question the use case. Thi=
s question came up in the IS-IS WG discussions.&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-right:0in" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Gin=
sberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.c=
om</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I guess what we were trying to envision=
 the use case and whether it makes sense for all the nodes in the IGP routi=
ng domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Additionally, if it is needed in the IG=
Ps, should there also be a BGP-LS Link Attribute TLV proposed?&nbsp;</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee&nbsp;</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Alexander Vainshtein &lt;<a href=3D"mailto:Alexande=
r.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Hi all,</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">I concur with Greg: from my POV an in=
teroperable solution should not depend on an omniscient NMS client distribu=
ting information about capabilities of each node
 to each other node. </span><span style=3D"color:black"><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Regards,</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Sasha</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Office: &#43;972-39266302</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &=
#43;972-549266302</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Greg M=
irsky [<a href=3D"mailto:gregimirsky@gmail.com">mailto:gregimirsky@gmail.co=
m</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Greg &#8211;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">I am having trouble understanding your response.</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The question we are raising is whether we should ex=
tend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Saying that the IGP functionality is optional and/o=
r wouldn&#8217;t always be advertised doesn&#8217;t really answer
 the question of whether we should or should not define the IGP extensions.=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Could you respond more directly to this point?</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black">From:</span></b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black"> Greg Mirsky
 [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimi=
rsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Greg,&nbsp;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Although it is a bit late, we&#8217;ve had some discu=
ssions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Thanks,</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Acee &nbsp;</span><span style=3D"color:black"><o:p></=
o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces@ietf.org" t=
arget=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Greg Mirsky &lt=
;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gma=
il.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">thank you for the most expedient review and comments.=
 I'll make changes in Section 2 per your suggestion.</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks &lt;<=
a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.c=
om</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">The changes all look good.</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">I still think you should say something in the document abou=
t what &quot;the time of packet arrival&quot; and &quot;transmission&quot; =
means, and call out the point you made about being careful to not
 introduce apparent jitter by not making those measurements consistently. (=
The definitions you point to in your earlier mail from G.8013 don't really =
help - they just say &quot;time of packet arrival&quot;. Again, the first a=
nd last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Please look at the new first paragraph of section 2 - there=
's a mix of &quot;as case&quot; and &quot;in case&quot; that should be made=
 consistent. I suspect it would be easiest to simply say &quot;referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">RjS</span><span style=3D"color:black"><o:p></o:p></span></p=
>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</span><span s=
tyle=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Sasha Vainshtein came with elegant idea to address di=
sconnection between discussion of one-step and two-step
 modes that you've pointed out. We've moved Section 7 as sub-section into S=
ection 2 now. Attached are updated diff and the proposed new version -13.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">once again, thank you for your thorough review and th=
e most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks &lt;<a=
 href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].<br>
<br>
<br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</body>
</html>

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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: John E Drake <jdrake@juniper.net>, "Acee Lindem (acee)" <acee@cisco.com>,  Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Cc: "Abhay Roy \(akr\)" <akr@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, Robert Sparks <rjsparks@nostrum.com>, "ietf@ietf.org" <ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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John -

For me, this raises the age-old question of when it is/is not appropriate t=
o use IGPs for flooding information.

This is clearly not TE information - you just happen to be using this in co=
njunction with MPLS - but it is a generic capability. I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities. It a=
lso, as Acee has pointed out, results in flooding information to all nodes =
in the domain when only a few care about it.

   Les

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 8:54 AM
To: Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg (gi=
nsberg)
Cc: Robert Sparks; mpls@ietf.org; gen-art@ietf.org; draft-ietf-mpls-residen=
ce-time.all@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node's RTM capabil=
ities and distribute them to the other nodes is undefined.  Further, one of=
 the ways by which an omniscient controller learns a node's capabilities is=
 by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander=
 Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@e=
citele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.c=
om>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com=
>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I'm sorry but I focused mainly on the OSPF protocol aspects then and didn't=
 question the use case. This question came up in the IS-IS WG discussions.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].









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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John &#8211;<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">For me, this raises the a=
ge-old question of when it is/is not appropriate to use IGPs for flooding i=
nformation.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">This is clearly not TE in=
formation &#8211; you just happen to be using this in conjunction with MPLS=
 &#8211; but it is a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> John E D=
rake [mailto:jdrake@juniper.net]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; mpls@ietf.org; gen-art@ietf.org; draft-ietf-mpls-=
residence-time.all@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Acee,<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Relying on an omniscient =
controller is a non-starter in general and in particular because the protoc=
ol by which it would learn each node&#8217;s RTM capabilities
 and distribute them to the other nodes is undefined.&nbsp; Further, one of=
 the ways by which an omniscient controller learns a node&#8217;s capabilit=
ies is by snooping the link/state database.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John<o:p></o:p></span></p=
>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vai=
nshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky =
&lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
 Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg=
@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi John,&nbsp;<o:p></o:p></=
span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">John E Drake &lt;<a href=3D"mailto:jdra=
ke@juniper.net">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@e=
citele.com">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a hr=
ef=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<a hr=
ef=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft=
-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draf=
t-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>=
&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay =
Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<=
br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Acee,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">We discussed all of this =
with you over a year ago and used your guidance in adding the indication of=
 RTM capability to OSPF.</span><span style=3D"color:black"><o:p></o:p></spa=
n></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I&#8217;m sorry but I focus=
ed mainly on the OSPF protocol aspects then and didn&#8217;t question the u=
se case. This question came up in the IS-IS WG discussions.&nbsp;<o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thanks,<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Acee<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,</sp=
an><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&qu=
ot;;color:black"> Acee Lindem (acee) [<a href=3D"mailto:acee@cisco.com">mai=
lto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Gin=
sberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.c=
om</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I guess what we were trying=
 to envision the use case and whether it makes sense for all the nodes in t=
he IGP routing domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Additionally, if it is need=
ed in the IGPs, should there also be a BGP-LS Link Attribute TLV proposed?&=
nbsp;</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thanks,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Acee&nbsp;</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">Alexander Vainshtein &lt;<a href=3D"mai=
lto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&=
gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Hi all,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">I concur with Greg: from =
my POV an interoperable solution should not depend on an omniscient NMS cli=
ent distributing information about capabilities of each
 node to each other node. </span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Regards,</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Sasha</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Office: &#43;972-39266302=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp; &#43;972-549266302</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&qu=
ot;;color:black"> Greg Mirsky [<a href=3D"mailto:gregimirsky@gmail.com">mai=
lto:gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Greg &#8211;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">I am having trouble understanding your =
response.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">The question we are raising is whether =
we should extend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Saying that the IGP functionality is op=
tional and/or wouldn&#8217;t always be advertised doesn&#8217;t really
 answer the question of whether we should or should not define the IGP exte=
nsions.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Could you respond more directly to this=
 point?</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
&quot;sans-serif&quot;;color:black">From:</span></b><span style=3D"font-siz=
e:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;;color:black"=
> Greg
 Mirsky [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">=
gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Greg,&nbsp;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Although it is a bit late, we&#8217;ve ha=
d some discussions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Thanks,</span><span style=3D"color:black"=
><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Acee &nbsp;</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces=
@ietf.org" target=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Gre=
g Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gre=
gimirsky@gmail.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">thank you for the most expedient review a=
nd comments. I'll make changes in Section 2 per your suggestion.</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert =
Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjspar=
ks@nostrum.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">The changes all look good.</span><span style=3D=
"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">I still think you should say something in the d=
ocument about what &quot;the time of packet arrival&quot; and &quot;transmi=
ssion&quot; means, and call out the point you made about being careful to
 not introduce apparent jitter by not making those measurements consistentl=
y. (The definitions you point to in your earlier mail from G.8013 don't rea=
lly help - they just say &quot;time of packet arrival&quot;. Again, the fir=
st and last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">Please look at the new first paragraph of secti=
on 2 - there's a mix of &quot;as case&quot; and &quot;in case&quot; that sh=
ould be made consistent. I suspect it would be easiest to simply say &quot;=
referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">RjS</span><span style=3D"color:black"><o:p></o:=
p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Sasha Vainshtein came with elegant idea t=
o address disconnection between discussion of one-step and
 two-step modes that you've pointed out. We've moved Section 7 as sub-secti=
on into Section 2 now. Attached are updated diff and the proposed new versi=
on -13.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mir=
sky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimir=
sky@gmail.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">once again, thank you for your thorough r=
eview and the most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert S=
parks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjspark=
s@nostrum.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].<br>
<br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</body>
</html>

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From: Uma Chunduri <uma.chunduri@huawei.com>
To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, John E Drake <jdrake@juniper.net>, "Acee Lindem (acee)" <acee@cisco.com>, "Alexander Vainshtein" <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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I support advertising this in IGP.


>This is clearly not TE information -..
>I do not see the IGPs as the appropriate mechanism to flood generic interf=
ace capabilities

We have instances where both the above are not met and we flooded informati=
on.
https://tools.ietf.org/html/rfc7883 (Les, you co-authored the same!!)
https://tools.ietf.org/html/rfc7880

--
Uma C.

From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Les Ginsberg (ginsbe=
rg)
Sent: Thursday, January 19, 2017 9:25 AM
To: John E Drake <jdrake@juniper.net>; Acee Lindem (acee) <acee@cisco.com>;=
 Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>; Greg Mirsky <greg=
imirsky@gmail.com>
Cc: Abhay Roy (akr) <akr@cisco.com>; mpls@ietf.org; isis-chairs@ietf.org; g=
en-art@ietf.org; draft-ietf-mpls-residence-time.all@ietf.org; Robert Sparks=
 <rjsparks@nostrum.com>; ietf@ietf.org
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

For me, this raises the age-old question of when it is/is not appropriate t=
o use IGPs for flooding information.

This is clearly not TE information - you just happen to be using this in co=
njunction with MPLS - but it is a generic capability. I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities. It a=
lso, as Acee has pointed out, results in flooding information to all nodes =
in the domain when only a few care about it.

   Les

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 8:54 AM
To: Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg (gi=
nsberg)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node's RTM capabil=
ities and distribute them to the other nodes is undefined.  Further, one of=
 the ways by which an omniscient controller learns a node's capabilities is=
 by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander=
 Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@e=
citele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.c=
om>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com=
>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I'm sorry but I focused mainly on the OSPF protocol aspects then and didn't=
 question the use case. This question came up in the IS-IS WG discussions.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].








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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">I support=
 advertising this in IGP.<o:p></o:p></span></a></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&gt;</span><span style=3D"font-size:1=
1.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">This is cle=
arly not TE information &#8211;..<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&gt;I do not see the IGPs as the appr=
opriate mechanism to flood generic interface capabilities<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We have instances where both the abov=
e are not met and we flooded information.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><a href=3D"https://tools.ietf.org/html/rfc7883"><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">htt=
ps://tools.ietf.org/html/rfc7883</span></a><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> (Les,
 you co-authored the same!!)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><a href=3D"https://tools.ietf.org/html/rfc7880"><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">htt=
ps://tools.ietf.org/html/rfc7880</span></a><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">--</span><span style=3D"font-size:11.=
0pt;font-family:&quot;Freestyle Script&quot;;color:#1F497D"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Uma C.</span><span style=3D"font-size=
:11.0pt;font-family:&quot;Brush Script MT&quot;;color:#1F497D"><o:p></o:p><=
/span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> mpls [mailto:mpls-bounces@ietf=
.org]
<b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
<b>Sent:</b> Thursday, January 19, 2017 9:25 AM<br>
<b>To:</b> John E Drake &lt;jdrake@juniper.net&gt;; Acee Lindem (acee) &lt;=
acee@cisco.com&gt;; Alexander Vainshtein &lt;Alexander.Vainshtein@ecitele.c=
om&gt;; Greg Mirsky &lt;gregimirsky@gmail.com&gt;<br>
<b>Cc:</b> Abhay Roy (akr) &lt;akr@cisco.com&gt;; mpls@ietf.org; isis-chair=
s@ietf.org; gen-art@ietf.org; draft-ietf-mpls-residence-time.all@ietf.org; =
Robert Sparks &lt;rjsparks@nostrum.com&gt;; ietf@ietf.org<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John &#8211;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">For me, this raises the age-old quest=
ion of when it is/is not appropriate to use IGPs for flooding information.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">This is clearly not TE information &#=
8211; you just happen to be using this in conjunction with MPLS &#8211; but=
 it is a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> John E Drake [<a href=3D"mailto:=
jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Relying on an omniscient controller i=
s a non-starter in general and in particular because the protocol by which =
it would learn each node&#8217;s RTM capabilities and
 distribute them to the other nodes is undefined.&nbsp; Further, one of the=
 ways by which an omniscient controller learns a node&#8217;s capabilities =
is by snooping the link/state database.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Acee Lindem (acee) [<a href=3D=
"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vai=
nshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky =
&lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
 Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg=
@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi John,&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">John E Drake &lt;<a href=3D"mailto:jdrake@juniper.n=
et">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@e=
citele.com">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a hr=
ef=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<a hr=
ef=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft=
-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draf=
t-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>=
&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay =
Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<=
br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We discussed all of this with you ove=
r a year ago and used your guidance in adding the indication of RTM capabil=
ity to OSPF.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I&#8217;m sorry but I focused mainly on=
 the OSPF protocol aspects then and didn&#8217;t question the use case. Thi=
s question came up in the IS-IS WG discussions.&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Gin=
sberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.c=
om</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I guess what we were trying to envision=
 the use case and whether it makes sense for all the nodes in the IGP routi=
ng domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Additionally, if it is needed in the IG=
Ps, should there also be a BGP-LS Link Attribute TLV proposed?&nbsp;</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee&nbsp;</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Alexander Vainshtein &lt;<a href=3D"mailto:Alexande=
r.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Hi all,</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">I concur with Greg: from my POV an in=
teroperable solution should not depend on an omniscient NMS client distribu=
ting information about capabilities of each node
 to each other node. </span><span style=3D"color:black"><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Regards,</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Sasha</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Office: &#43;972-39266302</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &=
#43;972-549266302</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Greg M=
irsky [<a href=3D"mailto:gregimirsky@gmail.com">mailto:gregimirsky@gmail.co=
m</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Greg &#8211;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">I am having trouble understanding your response.</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The question we are raising is whether we should ex=
tend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Saying that the IGP functionality is optional and/o=
r wouldn&#8217;t always be advertised doesn&#8217;t really answer
 the question of whether we should or should not define the IGP extensions.=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Could you respond more directly to this point?</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black">From:</span></b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black"> Greg Mirsky
 [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimi=
rsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Greg,&nbsp;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Although it is a bit late, we&#8217;ve had some discu=
ssions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Thanks,</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Acee &nbsp;</span><span style=3D"color:black"><o:p></=
o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces@ietf.org" t=
arget=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Greg Mirsky &lt=
;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gma=
il.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">thank you for the most expedient review and comments.=
 I'll make changes in Section 2 per your suggestion.</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks &lt;<=
a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.c=
om</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">The changes all look good.</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">I still think you should say something in the document abou=
t what &quot;the time of packet arrival&quot; and &quot;transmission&quot; =
means, and call out the point you made about being careful to not
 introduce apparent jitter by not making those measurements consistently. (=
The definitions you point to in your earlier mail from G.8013 don't really =
help - they just say &quot;time of packet arrival&quot;. Again, the first a=
nd last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Please look at the new first paragraph of section 2 - there=
's a mix of &quot;as case&quot; and &quot;in case&quot; that should be made=
 consistent. I suspect it would be easiest to simply say &quot;referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">RjS</span><span style=3D"color:black"><o:p></o:p></span></p=
>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</span><span s=
tyle=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Sasha Vainshtein came with elegant idea to address di=
sconnection between discussion of one-step and two-step
 modes that you've pointed out. We've moved Section 7 as sub-section into S=
ection 2 now. Attached are updated diff and the proposed new version -13.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">once again, thank you for your thorough review and th=
e most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks &lt;<a=
 href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].<br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</body>
</html>

--_000_25B4902B1192E84696414485F57268540187782Adfweml501mbb_--


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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: Uma Chunduri <uma.chunduri@huawei.com>, John E Drake <jdrake@juniper.net>,  "Acee Lindem (acee)" <acee@cisco.com>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Date: Thu, 19 Jan 2017 20:11:17 +0000
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Uma -

I readily admit S-BFD descriptors are - strictly speaking - a violation of =
the "non-routing info" policy - this was publicly acknowledged at the time =
the drafts were written. The exception was justified on the basis that:

  o IGPs are BFD clients
  o The S-BFD discriminator information is unique and extremely modest in s=
ize

What we have here is a proposal to start advertising non-routing related in=
terface attribute information. There is nothing special or unique about RTM=
 - it is simply one of many interface attributes which are generic in natur=
e. Having agreed to advertise RTM in the IGPs, how would you then determine=
 what other interface attributes should/should not be advertised by the IGP=
s? Take a look at your favorite vendors box and see how many interface attr=
ibutes can be configured.

It is also concerning that - when using the IGPs - we flood information whi=
ch must be stored on every node even though the use case for it is limited =
to a much smaller subset.

I think we can and should be smarter in this regard - and given the extensi=
ve work being done to enhance manageability I would like to see us benefit =
from this.

The authors of draft-ietf-mpls-residence-time clearly had some thoughts in =
this regard - which is why they proposed to use RFC 6823 (GENAPP) in IS-IS =
to advertise the information -but the proposal in the draft is flawed in th=
is regard. If we were to head in the "application" direction I would propos=
e a much more generic "application" which is capable of advertising many in=
terface attributes. However this goes back to my original concern - whether=
 we want to use IGPs to flood interface attribute information unrelated to =
routing even if it is segregated under an application. Remember that RFC 68=
23 stipulates that a separate instance of the protocol (a la RFC 6822) be u=
sed for such cases.

   Les


From: Uma Chunduri [mailto:uma.chunduri@huawei.com]
Sent: Thursday, January 19, 2017 11:41 AM
To: Les Ginsberg (ginsberg); John E Drake; Acee Lindem (acee); Alexander Va=
inshtein; Greg Mirsky
Cc: Abhay Roy (akr); mpls@ietf.org; isis-chairs@ietf.org; gen-art@ietf.org;=
 draft-ietf-mpls-residence-time.all@ietf.org; Robert Sparks; ietf@ietf.org
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

I support advertising this in IGP.


>This is clearly not TE information -..
>I do not see the IGPs as the appropriate mechanism to flood generic interf=
ace capabilities

We have instances where both the above are not met and we flooded informati=
on.
https://tools.ietf.org/html/rfc7883 (Les, you co-authored the same!!)
https://tools.ietf.org/html/rfc7880

--
Uma C.

From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Les Ginsberg (ginsbe=
rg)
Sent: Thursday, January 19, 2017 9:25 AM
To: John E Drake <jdrake@juniper.net>; Acee Lindem (acee) <acee@cisco.com>;=
 Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>; Greg Mirsky <greg=
imirsky@gmail.com>
Cc: Abhay Roy (akr) <akr@cisco.com>; mpls@ietf.org; isis-chairs@ietf.org; g=
en-art@ietf.org; draft-ietf-mpls-residence-time.all@ietf.org; Robert Sparks=
 <rjsparks@nostrum.com>; ietf@ietf.org
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

For me, this raises the age-old question of when it is/is not appropriate t=
o use IGPs for flooding information.

This is clearly not TE information - you just happen to be using this in co=
njunction with MPLS - but it is a generic capability. I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities. It a=
lso, as Acee has pointed out, results in flooding information to all nodes =
in the domain when only a few care about it.

   Les

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 8:54 AM
To: Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg (gi=
nsberg)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node's RTM capabil=
ities and distribute them to the other nodes is undefined.  Further, one of=
 the ways by which an omniscient controller learns a node's capabilities is=
 by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander=
 Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@e=
citele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.c=
om>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com=
>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I'm sorry but I focused mainly on the OSPF protocol aspects then and didn't=
 question the use case. This question came up in the IS-IS WG discussions.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].







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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Uma &#8211;<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">I readily admit S-BFD des=
criptors are &#8211; strictly speaking - a violation of the &#8220;non-rout=
ing info&#8221; policy &#8211; this was publicly acknowledged at the time t=
he drafts
 were written. The exception was justified on the basis that:<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp; o IGPs are BFD cli=
ents<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp; o The S-BFD discri=
minator information is unique and extremely modest in size<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">What we have here is a pr=
oposal to start advertising non-routing related interface attribute informa=
tion. There is nothing special or unique about RTM &#8211; it
 is simply one of many interface attributes which are generic in nature. Ha=
ving agreed to advertise RTM in the IGPs, how would you then determine what=
 other interface attributes should/should not be advertised by the IGPs? Ta=
ke a look at your favorite vendors
 box and see how many interface attributes can be configured.<br>
<br>
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">It is also concerning tha=
t &#8211; when using the IGPs &#8211; we flood information which must be st=
ored on every node even though the use case for it is limited to a much
 smaller subset.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">I think we can and should=
 be smarter in this regard &#8211; and given the extensive work being done =
to enhance manageability I would like to see us benefit from this.<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">The authors of draft-ietf=
-mpls-residence-time clearly had some thoughts in this regard &#8211; which=
 is why they proposed to use RFC 6823 (GENAPP) in IS-IS to advertise
 the information &#8211;but the proposal in the draft is flawed in this reg=
ard. If we were to head in the &#8220;application&#8221; direction I would =
propose a much more generic &#8220;application&#8221; which is capable of a=
dvertising many interface attributes. However this goes back to
 my original concern &#8211; whether we want to use IGPs to flood interface=
 attribute information unrelated to routing even if it is segregated under =
an application. Remember that RFC 6823 stipulates that a separate instance =
of the protocol (a la RFC 6822) be used
 for such cases.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Uma Chun=
duri [mailto:uma.chunduri@huawei.com]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:41 AM<br>
<b>To:</b> Les Ginsberg (ginsberg); John E Drake; Acee Lindem (acee); Alexa=
nder Vainshtein; Greg Mirsky<br>
<b>Cc:</b> Abhay Roy (akr); mpls@ietf.org; isis-chairs@ietf.org; gen-art@ie=
tf.org; draft-ietf-mpls-residence-time.all@ietf.org; Robert Sparks; ietf@ie=
tf.org<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497=
D">I support advertising this in IGP.</span></a><span style=3D"font-size:11=
.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&gt;This is clearly not T=
E information &#8211;..<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&gt;I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">We have instances where b=
oth the above are not met and we flooded information.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><a href=3D"https://tools.ietf.org/html/rfc7883"><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-seri=
f&quot;">https://tools.ietf.org/html/rfc7883</span></a><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1=
F497D">
 (Les, you co-authored the same!!)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><a href=3D"https://tools.ietf.org/html/rfc7880"><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-seri=
f&quot;">https://tools.ietf.org/html/rfc7880</span></a><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1=
F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">--</span><span style=3D"f=
ont-size:11.0pt;font-family:&quot;Freestyle Script&quot;;color:#1F497D"><o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Uma C.</span><span style=
=3D"font-size:11.0pt;font-family:&quot;Brush Script MT&quot;;color:#1F497D"=
><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> mpls [=
mailto:mpls-bounces@ietf.org]
<b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
<b>Sent:</b> Thursday, January 19, 2017 9:25 AM<br>
<b>To:</b> John E Drake &lt;jdrake@juniper.net&gt;; Acee Lindem (acee) &lt;=
acee@cisco.com&gt;; Alexander Vainshtein &lt;Alexander.Vainshtein@ecitele.c=
om&gt;; Greg Mirsky &lt;gregimirsky@gmail.com&gt;<br>
<b>Cc:</b> Abhay Roy (akr) &lt;akr@cisco.com&gt;; mpls@ietf.org; isis-chair=
s@ietf.org; gen-art@ietf.org; draft-ietf-mpls-residence-time.all@ietf.org; =
Robert Sparks &lt;rjsparks@nostrum.com&gt;; ietf@ietf.org<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John &#8211;<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">For me, this raises the a=
ge-old question of when it is/is not appropriate to use IGPs for flooding i=
nformation.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">This is clearly not TE in=
formation &#8211; you just happen to be using this in conjunction with MPLS=
 &#8211; but it is a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> John E D=
rake [<a href=3D"mailto:jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Acee,<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Relying on an omniscient =
controller is a non-starter in general and in particular because the protoc=
ol by which it would learn each node&#8217;s RTM capabilities
 and distribute them to the other nodes is undefined.&nbsp; Further, one of=
 the ways by which an omniscient controller learns a node&#8217;s capabilit=
ies is by snooping the link/state database.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John<o:p></o:p></span></p=
>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vai=
nshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky =
&lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
 Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg=
@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi John,&nbsp;<o:p></o:p></=
span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">John E Drake &lt;<a href=3D"mailto:jdra=
ke@juniper.net">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@e=
citele.com">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a hr=
ef=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<a hr=
ef=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft=
-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draf=
t-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>=
&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay =
Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<=
br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Acee,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">We discussed all of this =
with you over a year ago and used your guidance in adding the indication of=
 RTM capability to OSPF.</span><span style=3D"color:black"><o:p></o:p></spa=
n></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I&#8217;m sorry but I focus=
ed mainly on the OSPF protocol aspects then and didn&#8217;t question the u=
se case. This question came up in the IS-IS WG discussions.&nbsp;<o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thanks,<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Acee<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,</sp=
an><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&qu=
ot;;color:black"> Acee Lindem (acee) [<a href=3D"mailto:acee@cisco.com">mai=
lto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Gin=
sberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.c=
om</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I guess what we were trying=
 to envision the use case and whether it makes sense for all the nodes in t=
he IGP routing domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Additionally, if it is need=
ed in the IGPs, should there also be a BGP-LS Link Attribute TLV proposed?&=
nbsp;</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thanks,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Acee&nbsp;</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">Alexander Vainshtein &lt;<a href=3D"mai=
lto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&=
gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Hi all,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">I concur with Greg: from =
my POV an interoperable solution should not depend on an omniscient NMS cli=
ent distributing information about capabilities of each
 node to each other node. </span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Regards,</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Sasha</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Office: &#43;972-39266302=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp; &#43;972-549266302</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&qu=
ot;;color:black"> Greg Mirsky [<a href=3D"mailto:gregimirsky@gmail.com">mai=
lto:gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Greg &#8211;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">I am having trouble understanding your =
response.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">The question we are raising is whether =
we should extend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Saying that the IGP functionality is op=
tional and/or wouldn&#8217;t always be advertised doesn&#8217;t really
 answer the question of whether we should or should not define the IGP exte=
nsions.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Could you respond more directly to this=
 point?</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
&quot;sans-serif&quot;;color:black">From:</span></b><span style=3D"font-siz=
e:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;;color:black"=
> Greg
 Mirsky [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">=
gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Greg,&nbsp;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Although it is a bit late, we&#8217;ve ha=
d some discussions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Thanks,</span><span style=3D"color:black"=
><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Acee &nbsp;</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces=
@ietf.org" target=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Gre=
g Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gre=
gimirsky@gmail.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">thank you for the most expedient review a=
nd comments. I'll make changes in Section 2 per your suggestion.</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert =
Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjspar=
ks@nostrum.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">The changes all look good.</span><span style=3D=
"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">I still think you should say something in the d=
ocument about what &quot;the time of packet arrival&quot; and &quot;transmi=
ssion&quot; means, and call out the point you made about being careful to
 not introduce apparent jitter by not making those measurements consistentl=
y. (The definitions you point to in your earlier mail from G.8013 don't rea=
lly help - they just say &quot;time of packet arrival&quot;. Again, the fir=
st and last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">Please look at the new first paragraph of secti=
on 2 - there's a mix of &quot;as case&quot; and &quot;in case&quot; that sh=
ould be made consistent. I suspect it would be easiest to simply say &quot;=
referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">RjS</span><span style=3D"color:black"><o:p></o:=
p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Sasha Vainshtein came with elegant idea t=
o address disconnection between discussion of one-step and
 two-step modes that you've pointed out. We've moved Section 7 as sub-secti=
on into Section 2 now. Attached are updated diff and the proposed new versi=
on -13.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mir=
sky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimir=
sky@gmail.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">once again, thank you for your thorough r=
eview and the most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert S=
parks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjspark=
s@nostrum.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</body>
</html>

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From: John E Drake <jdrake@juniper.net>
To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, "Acee Lindem (acee)" <acee@cisco.com>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Cc: "Abhay Roy \(akr\)" <akr@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, Robert Sparks <rjsparks@nostrum.com>, "ietf@ietf.org" <ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Les,

Comments inline.

Yours Irrespectively,

John

From: Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com]
Sent: Thursday, January 19, 2017 12:25 PM
To: John E Drake <jdrake@juniper.net>; Acee Lindem (acee) <acee@cisco.com>;=
 Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>; Greg Mirsky <greg=
imirsky@gmail.com>
Cc: Robert Sparks <rjsparks@nostrum.com>; mpls@ietf.org; gen-art@ietf.org; =
draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org; isis-chairs@iet=
f.org; Abhay Roy (akr) <akr@cisco.com>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

For me, this raises the age-old question of when it is/is not appropriate t=
o use IGPs for flooding information.

This is clearly not TE information - you just happen to be using this in co=
njunction with MPLS - but it is a generic capability. I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities. It a=
lso, as Acee has pointed out, results in flooding information to all nodes =
in the domain when only a few care about it.

[JD]  RTM support as defined in the draft would be used to provide extremel=
y accurate time synchronization in an MPLS network so I would suggest that =
all nodes in such a network would be using it and hence that it does belong=
 in the IGP.  As an aside, advertising it in the IGP facilitates incrementa=
l or partial deployment.  Your yesterday's email supports this:

"It would seem more appropriate to treat RTM information either as:

   o an extension to link attribute information already advertised by the I=
GPs (as has been suggested for OSPF) - which would suggest in IS-IS a sub-T=
LV of TLV 22(et al)

or


*        As an interface attribute independent of routing protocols which c=
ould be retrieved utilizing network management tools"

   Les

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 8:54 AM
To: Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg (gi=
nsberg)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node's RTM capabil=
ities and distribute them to the other nodes is undefined.  Further, one of=
 the ways by which an omniscient controller learns a node's capabilities is=
 by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander=
 Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@e=
citele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.c=
om>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com=
>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I'm sorry but I focused mainly on the OSPF protocol aspects then and didn't=
 question the use case. This question came up in the IS-IS WG discussions.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].








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libri&quot;,sans-serif;color:#1F497D">Les,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Comments inline.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Les Ginsberg (ginsberg) [mailt=
o:ginsberg@cisco.com]
<br>
<b>Sent:</b> Thursday, January 19, 2017 12:25 PM<br>
<b>To:</b> John E Drake &lt;jdrake@juniper.net&gt;; Acee Lindem (acee) &lt;=
acee@cisco.com&gt;; Alexander Vainshtein &lt;Alexander.Vainshtein@ecitele.c=
om&gt;; Greg Mirsky &lt;gregimirsky@gmail.com&gt;<br>
<b>Cc:</b> Robert Sparks &lt;rjsparks@nostrum.com&gt;; mpls@ietf.org; gen-a=
rt@ietf.org; draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org; is=
is-chairs@ietf.org; Abhay Roy (akr) &lt;akr@cisco.com&gt;<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John &#8211;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">For me, this raises the age-old quest=
ion of when it is/is not appropriate to use IGPs for flooding information.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">This is clearly not TE information &#=
8211; you just happen to be using this in conjunction with MPLS &#8211; but=
 it is a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">[JD]&nbsp; RTM support as defin=
ed in the draft would be used to provide extremely accurate time synchroniz=
ation in an MPLS network so I would suggest that all
 nodes in such a network would be using it and hence that it does belong in=
 the IGP.&nbsp; As an aside, advertising it in the IGP facilitates incremen=
tal or partial deployment.&nbsp; Your yesterday&#8217;s email supports this=
:&nbsp;
<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">&#8220;It would seem more appro=
priate to treat RTM information either as:<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:=
p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">&nb=
sp;&nbsp; o an extension to link attribute information already advertised b=
y the IGPs (as has been suggested for OSPF) - which would
 suggest in IS-IS a sub-TLV of TLV 22(et al)<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:=
p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">or<o:p></o:p></span></i></b></p=
>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:=
p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:27.6pt;text-indent:-.25i=
n;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style=3D"font-size:11.0pt;font-family:Symbol;col=
or:#1F497D"><span style=3D"mso-list:Ignore">&middot;<span style=3D"font:7.0=
pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><b><i><span style=3D"font-size:11.0pt;font-f=
amily:&quot;Calibri&quot;,sans-serif;color:#1F497D">As an interface attribu=
te independent of routing protocols which could be retrieved utilizing netw=
ork management tools&#8221;<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> John E Drake [<a href=3D"mailto:=
jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Relying on an omniscient controller i=
s a non-starter in general and in particular because the protocol by which =
it would learn each node&#8217;s RTM capabilities and
 distribute them to the other nodes is undefined.&nbsp; Further, one of the=
 ways by which an omniscient controller learns a node&#8217;s capabilities =
is by snooping the link/state database.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Acee Lindem (acee) [<a href=3D=
"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vai=
nshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky =
&lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
 Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg=
@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi John,&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">John E Drake &lt;<a href=3D"mailto:jdrake@juniper.n=
et">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@e=
citele.com">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a hr=
ef=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<a hr=
ef=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft=
-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draf=
t-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>=
&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay =
Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<=
br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We discussed all of this with you ove=
r a year ago and used your guidance in adding the indication of RTM capabil=
ity to OSPF.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I&#8217;m sorry but I focused mainly on=
 the OSPF protocol aspects then and didn&#8217;t question the use case. Thi=
s question came up in the IS-IS WG discussions.&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Gin=
sberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.c=
om</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I guess what we were trying to envision=
 the use case and whether it makes sense for all the nodes in the IGP routi=
ng domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Additionally, if it is needed in the IG=
Ps, should there also be a BGP-LS Link Attribute TLV proposed?&nbsp;</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee&nbsp;</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Alexander Vainshtein &lt;<a href=3D"mailto:Alexande=
r.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Hi all,</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">I concur with Greg: from my POV an in=
teroperable solution should not depend on an omniscient NMS client distribu=
ting information about capabilities of each node
 to each other node. </span><span style=3D"color:black"><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Regards,</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Sasha</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Office: &#43;972-39266302</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &=
#43;972-549266302</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Greg M=
irsky [<a href=3D"mailto:gregimirsky@gmail.com">mailto:gregimirsky@gmail.co=
m</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Greg &#8211;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">I am having trouble understanding your response.</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The question we are raising is whether we should ex=
tend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Saying that the IGP functionality is optional and/o=
r wouldn&#8217;t always be advertised doesn&#8217;t really answer
 the question of whether we should or should not define the IGP extensions.=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Could you respond more directly to this point?</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black">From:</span></b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black"> Greg Mirsky
 [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimi=
rsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Greg,&nbsp;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Although it is a bit late, we&#8217;ve had some discu=
ssions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Thanks,</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Acee &nbsp;</span><span style=3D"color:black"><o:p></=
o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces@ietf.org" t=
arget=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Greg Mirsky &lt=
;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gma=
il.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">thank you for the most expedient review and comments.=
 I'll make changes in Section 2 per your suggestion.</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks &lt;<=
a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.c=
om</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">The changes all look good.</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">I still think you should say something in the document abou=
t what &quot;the time of packet arrival&quot; and &quot;transmission&quot; =
means, and call out the point you made about being careful to not
 introduce apparent jitter by not making those measurements consistently. (=
The definitions you point to in your earlier mail from G.8013 don't really =
help - they just say &quot;time of packet arrival&quot;. Again, the first a=
nd last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Please look at the new first paragraph of section 2 - there=
's a mix of &quot;as case&quot; and &quot;in case&quot; that should be made=
 consistent. I suspect it would be easiest to simply say &quot;referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">RjS</span><span style=3D"color:black"><o:p></o:p></span></p=
>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</span><span s=
tyle=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Sasha Vainshtein came with elegant idea to address di=
sconnection between discussion of one-step and two-step
 modes that you've pointed out. We've moved Section 7 as sub-section into S=
ection 2 now. Attached are updated diff and the proposed new version -13.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">once again, thank you for your thorough review and th=
e most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks &lt;<a=
 href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].<br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</body>
</html>

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From: Eric Gray <eric.gray@ericsson.com>
To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, Uma Chunduri <uma.chunduri@huawei.com>, John E Drake <jdrake@juniper.net>, "Acee Lindem (acee)" <acee@cisco.com>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Date: Thu, 19 Jan 2017 20:31:45 +0000
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Cc: "mpls@ietf.org" <mpls@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, Robert Sparks <rjsparks@nostrum.com>, "Abhay Roy \(akr\)" <akr@cisco.com>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Les,

                It's nice to have a good discussion about technical aspects=
 of a proposed standard, even late in the game.

                But I have some difficulty is seeing how this usage is "cle=
arly not TE information."

This information should allow the head-end of an LSP to select a path based=
 on desirable interface capabilities.  For the purposes of accurate time in=
formation, the best path may not also be the shortest path.  Is this not ex=
actly what traffic engineering is about?

As far as extending this argument to the ability to advertise additional li=
nk capabilities, I can easily imagine scenarios where that would make sense=
.  But nobody is suggesting that every LSR (or router for that matter) eith=
er must have this capability for every scenario, or that - having the capab=
ility - it would need to be turned on.

If there is an application or use-case out there that might require adverti=
sing every conceivable interface capability, then vendors will want to take=
 a look at the size of the opportunity represented by that and make a decis=
ion as to whether or not to support this.

--
Eric

From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Les Ginsberg (ginsbe=
rg)
Sent: Thursday, January 19, 2017 3:11 PM
To: Uma Chunduri <uma.chunduri@huawei.com>; John E Drake <jdrake@juniper.ne=
t>; Acee Lindem (acee) <acee@cisco.com>; Alexander Vainshtein <Alexander.Va=
inshtein@ecitele.com>; Greg Mirsky <gregimirsky@gmail.com>
Cc: mpls@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; gen-art@ietf.org; d=
raft-ietf-mpls-residence-time.all@ietf.org; Abhay Roy (akr) <akr@cisco.com>=
; Robert Sparks <rjsparks@nostrum.com>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Uma -

I readily admit S-BFD descriptors are - strictly speaking - a violation of =
the "non-routing info" policy - this was publicly acknowledged at the time =
the drafts were written. The exception was justified on the basis that:

  o IGPs are BFD clients
  o The S-BFD discriminator information is unique and extremely modest in s=
ize

What we have here is a proposal to start advertising non-routing related in=
terface attribute information. There is nothing special or unique about RTM=
 - it is simply one of many interface attributes which are generic in natur=
e. Having agreed to advertise RTM in the IGPs, how would you then determine=
 what other interface attributes should/should not be advertised by the IGP=
s? Take a look at your favorite vendors box and see how many interface attr=
ibutes can be configured.
It is also concerning that - when using the IGPs - we flood information whi=
ch must be stored on every node even though the use case for it is limited =
to a much smaller subset.

I think we can and should be smarter in this regard - and given the extensi=
ve work being done to enhance manageability I would like to see us benefit =
from this.

The authors of draft-ietf-mpls-residence-time clearly had some thoughts in =
this regard - which is why they proposed to use RFC 6823 (GENAPP) in IS-IS =
to advertise the information -but the proposal in the draft is flawed in th=
is regard. If we were to head in the "application" direction I would propos=
e a much more generic "application" which is capable of advertising many in=
terface attributes. However this goes back to my original concern - whether=
 we want to use IGPs to flood interface attribute information unrelated to =
routing even if it is segregated under an application. Remember that RFC 68=
23 stipulates that a separate instance of the protocol (a la RFC 6822) be u=
sed for such cases.

   Les


From: Uma Chunduri [mailto:uma.chunduri@huawei.com]
Sent: Thursday, January 19, 2017 11:41 AM
To: Les Ginsberg (ginsberg); John E Drake; Acee Lindem (acee); Alexander Va=
inshtein; Greg Mirsky
Cc: Abhay Roy (akr); mpls@ietf.org<mailto:mpls@ietf.org>; isis-chairs@ietf.=
org<mailto:isis-chairs@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>=
; draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-reside=
nce-time.all@ietf.org>; Robert Sparks; ietf@ietf.org<mailto:ietf@ietf.org>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

I support advertising this in IGP.


>This is clearly not TE information -..
>I do not see the IGPs as the appropriate mechanism to flood generic interf=
ace capabilities

We have instances where both the above are not met and we flooded informati=
on.
https://tools.ietf.org/html/rfc7883 (Les, you co-authored the same!!)
https://tools.ietf.org/html/rfc7880

--
Uma C.

From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Les Ginsberg (ginsbe=
rg)
Sent: Thursday, January 19, 2017 9:25 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Acee Lind=
em (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Alexander Vainshtein <Al=
exander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>; G=
reg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>; mpls@ietf.org<ma=
ilto:mpls@ietf.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; gen=
-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@=
ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>; Robert Sparks=
 <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; ietf@ietf.org<mailto:=
ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

For me, this raises the age-old question of when it is/is not appropriate t=
o use IGPs for flooding information.

This is clearly not TE information - you just happen to be using this in co=
njunction with MPLS - but it is a generic capability. I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities. It a=
lso, as Acee has pointed out, results in flooding information to all nodes =
in the domain when only a few care about it.

   Les

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 8:54 AM
To: Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg (gi=
nsberg)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node's RTM capabil=
ities and distribute them to the other nodes is undefined.  Further, one of=
 the ways by which an omniscient controller learns a node's capabilities is=
 by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander=
 Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@e=
citele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.c=
om>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com=
>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I'm sorry but I focused mainly on the OSPF protocol aspects then and didn't=
 question the use case. This question came up in the IS-IS WG discussions.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].







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<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Les,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; It&#8217;s nice to have a good disc=
ussion about technical aspects of a proposed standard, even late in the gam=
e.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; But I have some difficulty is seein=
g how this usage is &#8220;clearly not TE information.&#8221;&nbsp;
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif">This information should =
allow the head-end of an LSP to select a path based on desirable interface =
capabilities.&nbsp; For the purposes of accurate time
 information, the best path may not also be the shortest path.&nbsp; Is thi=
s not exactly what traffic engineering is about?<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif">As far as extending this=
 argument to the ability to advertise additional link capabilities, I can e=
asily imagine scenarios where that would make sense.&nbsp;
 But nobody is suggesting that every LSR (or router for that matter) either=
 must have this capability for every scenario, or that &#8211; having the c=
apability &#8211; it would need to be turned on.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif">If there is an applicati=
on or use-case out there that might require advertising every conceivable i=
nterface capability, then vendors will want to take
 a look at the size of the opportunity represented by that and make a decis=
ion as to whether or not to support this.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">--<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Eric<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> mpls [mailto:mpls-bounces@ietf=
.org]
<b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
<b>Sent:</b> Thursday, January 19, 2017 3:11 PM<br>
<b>To:</b> Uma Chunduri &lt;uma.chunduri@huawei.com&gt;; John E Drake &lt;j=
drake@juniper.net&gt;; Acee Lindem (acee) &lt;acee@cisco.com&gt;; Alexander=
 Vainshtein &lt;Alexander.Vainshtein@ecitele.com&gt;; Greg Mirsky &lt;gregi=
mirsky@gmail.com&gt;<br>
<b>Cc:</b> mpls@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; gen-art@ietf=
.org; draft-ietf-mpls-residence-time.all@ietf.org; Abhay Roy (akr) &lt;akr@=
cisco.com&gt;; Robert Sparks &lt;rjsparks@nostrum.com&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Uma &#8211;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">I readily admit S-BFD descriptors are=
 &#8211; strictly speaking - a violation of the &#8220;non-routing info&#82=
21; policy &#8211; this was publicly acknowledged at the time the drafts
 were written. The exception was justified on the basis that:<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp; o IGPs are BFD clients<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp; o The S-BFD discriminator info=
rmation is unique and extremely modest in size<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">What w=
e have here is a proposal to start advertising non-routing related interfac=
e attribute information. There is nothing special
 or unique about RTM &#8211; it is simply one of many interface attributes =
which are generic in nature. Having agreed to advertise RTM in the IGPs, ho=
w would you then determine what other interface attributes should/should no=
t be advertised by the IGPs? Take a look
 at your favorite vendors box and see how many interface attributes can be =
configured.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">It is also concerning that &#8211; wh=
en using the IGPs &#8211; we flood information which must be stored on ever=
y node even though the use case for it is limited to a much
 smaller subset.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">I think we can and should be smarter =
in this regard &#8211; and given the extensive work being done to enhance m=
anageability I would like to see us benefit from this.<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">The authors of draft-ietf-mpls-reside=
nce-time clearly had some thoughts in this regard &#8211; which is why they=
 proposed to use RFC 6823 (GENAPP) in IS-IS to advertise
 the information &#8211;but the proposal in the draft is flawed in this reg=
ard. If we were to head in the &#8220;application&#8221; direction I would =
propose a much more generic &#8220;application&#8221; which is capable of a=
dvertising many interface attributes. However this goes back to
 my original concern &#8211; whether we want to use IGPs to flood interface=
 attribute information unrelated to routing even if it is segregated under =
an application. Remember that RFC 6823 stipulates that a separate instance =
of the protocol (a la RFC 6822) be used
 for such cases.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Uma Chunduri [<a href=3D"mailto:=
uma.chunduri@huawei.com">mailto:uma.chunduri@huawei.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:41 AM<br>
<b>To:</b> Les Ginsberg (ginsberg); John E Drake; Acee Lindem (acee); Alexa=
nder Vainshtein; Greg Mirsky<br>
<b>Cc:</b> Abhay Roy (akr); <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org<=
/a>; <a href=3D"mailto:isis-chairs@ietf.org">
isis-chairs@ietf.org</a>; <a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.=
org</a>;
<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-m=
pls-residence-time.all@ietf.org</a>; Robert Sparks;
<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a><br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">I support=
 advertising this in IGP.</span></a><span style=3D"font-size:11.0pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&gt;This is clearly not TE informatio=
n &#8211;..<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&gt;I do not see the IGPs as the appr=
opriate mechanism to flood generic interface capabilities<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We have instances where both the abov=
e are not met and we flooded information.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><a href=3D"https://tools.ietf.org/html/rfc7883"><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">htt=
ps://tools.ietf.org/html/rfc7883</span></a><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> (Les,
 you co-authored the same!!)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><a href=3D"https://tools.ietf.org/html/rfc7880"><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">htt=
ps://tools.ietf.org/html/rfc7880</span></a><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">--</span><span style=3D"font-size:11.=
0pt;font-family:&quot;Freestyle Script&quot;;color:#1F497D"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Uma C.</span><span style=3D"font-size=
:11.0pt;font-family:&quot;Brush Script MT&quot;;color:#1F497D"><o:p></o:p><=
/span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> mpls [<a href=3D"mailto:mpls-b=
ounces@ietf.org">mailto:mpls-bounces@ietf.org</a>]
<b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
<b>Sent:</b> Thursday, January 19, 2017 9:25 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com"=
>acee@cisco.com</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexand=
er.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
 Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail=
.com</a>&gt;<br>
<b>Cc:</b> Abhay Roy (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.c=
om</a>&gt;; <a href=3D"mailto:mpls@ietf.org">
mpls@ietf.org</a>; <a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf=
.org</a>;
<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>; <a href=3D"mailto=
:draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; Robert Sparks &lt;<a href=
=3D"mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John &#8211;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">For me, this raises the age-old quest=
ion of when it is/is not appropriate to use IGPs for flooding information.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">This is clearly not TE information &#=
8211; you just happen to be using this in conjunction with MPLS &#8211; but=
 it is a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> John E Drake [<a href=3D"mailto:=
jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Relying on an omniscient controller i=
s a non-starter in general and in particular because the protocol by which =
it would learn each node&#8217;s RTM capabilities and
 distribute them to the other nodes is undefined.&nbsp; Further, one of the=
 ways by which an omniscient controller learns a node&#8217;s capabilities =
is by snooping the link/state database.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Acee Lindem (acee) [<a href=3D=
"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vai=
nshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky =
&lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
 Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg=
@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi John,&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">John E Drake &lt;<a href=3D"mailto:jdrake@juniper.n=
et">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@e=
citele.com">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a hr=
ef=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<a hr=
ef=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft=
-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draf=
t-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>=
&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay =
Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<=
br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We discussed all of this with you ove=
r a year ago and used your guidance in adding the indication of RTM capabil=
ity to OSPF.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I&#8217;m sorry but I focused mainly on=
 the OSPF protocol aspects then and didn&#8217;t question the use case. Thi=
s question came up in the IS-IS WG discussions.&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Gin=
sberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.c=
om</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I guess what we were trying to envision=
 the use case and whether it makes sense for all the nodes in the IGP routi=
ng domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Additionally, if it is needed in the IG=
Ps, should there also be a BGP-LS Link Attribute TLV proposed?&nbsp;</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee&nbsp;</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Alexander Vainshtein &lt;<a href=3D"mailto:Alexande=
r.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Hi all,</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">I concur with Greg: from my POV an in=
teroperable solution should not depend on an omniscient NMS client distribu=
ting information about capabilities of each node
 to each other node. </span><span style=3D"color:black"><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Regards,</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Sasha</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Office: &#43;972-39266302</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &=
#43;972-549266302</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Greg M=
irsky [<a href=3D"mailto:gregimirsky@gmail.com">mailto:gregimirsky@gmail.co=
m</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Greg &#8211;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">I am having trouble understanding your response.</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The question we are raising is whether we should ex=
tend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Saying that the IGP functionality is optional and/o=
r wouldn&#8217;t always be advertised doesn&#8217;t really answer
 the question of whether we should or should not define the IGP extensions.=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Could you respond more directly to this point?</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black">From:</span></b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black"> Greg Mirsky
 [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimi=
rsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Greg,&nbsp;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Although it is a bit late, we&#8217;ve had some discu=
ssions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Thanks,</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Acee &nbsp;</span><span style=3D"color:black"><o:p></=
o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces@ietf.org" t=
arget=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Greg Mirsky &lt=
;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gma=
il.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">thank you for the most expedient review and comments.=
 I'll make changes in Section 2 per your suggestion.</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks &lt;<=
a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.c=
om</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">The changes all look good.</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">I still think you should say something in the document abou=
t what &quot;the time of packet arrival&quot; and &quot;transmission&quot; =
means, and call out the point you made about being careful to not
 introduce apparent jitter by not making those measurements consistently. (=
The definitions you point to in your earlier mail from G.8013 don't really =
help - they just say &quot;time of packet arrival&quot;. Again, the first a=
nd last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Please look at the new first paragraph of section 2 - there=
's a mix of &quot;as case&quot; and &quot;in case&quot; that should be made=
 consistent. I suspect it would be easiest to simply say &quot;referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">RjS</span><span style=3D"color:black"><o:p></o:p></span></p=
>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</span><span s=
tyle=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Sasha Vainshtein came with elegant idea to address di=
sconnection between discussion of one-step and two-step
 modes that you've pointed out. We've moved Section 7 as sub-section into S=
ection 2 now. Attached are updated diff and the proposed new version -13.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">once again, thank you for your thorough review and th=
e most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks &lt;<a=
 href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</body>
</html>

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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: John E Drake <jdrake@juniper.net>, "Acee Lindem (acee)" <acee@cisco.com>,  Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Date: Thu, 19 Jan 2017 21:08:58 +0000
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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John -

The text you have excerpted below was trying to say two things:

1)If you want to advertise this in the IGPs the OSPF style proposal is much=
 better from an implementation standpoint than the IS-IS GENAPP proposal

2)There is a larger question as to whether we should be using the IGPs for =
this at all

Statement #1 should not be interpreted to imply that I am advocating using =
the IGPs. :)

That said, we "ALWAYS" end up choosing using the IGPs to do this sort of th=
ing - not because it is the "RIGHT" thing to do architecturally - but becau=
se it is so convenient.

I am just asking for folks to pause and think about this a bit more from an=
 architectural perspective.

   Les


From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 12:20 PM
To: Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtein; Greg=
 Mirsky
Cc: Robert Sparks; mpls@ietf.org; gen-art@ietf.org; draft-ietf-mpls-residen=
ce-time.all@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Les,

Comments inline.

Yours Irrespectively,

John

From: Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com]
Sent: Thursday, January 19, 2017 12:25 PM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Acee Lind=
em (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Alexander Vainshtein <Al=
exander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>; G=
reg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

For me, this raises the age-old question of when it is/is not appropriate t=
o use IGPs for flooding information.

This is clearly not TE information - you just happen to be using this in co=
njunction with MPLS - but it is a generic capability. I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities. It a=
lso, as Acee has pointed out, results in flooding information to all nodes =
in the domain when only a few care about it.

[JD]  RTM support as defined in the draft would be used to provide extremel=
y accurate time synchronization in an MPLS network so I would suggest that =
all nodes in such a network would be using it and hence that it does belong=
 in the IGP.  As an aside, advertising it in the IGP facilitates incrementa=
l or partial deployment.  Your yesterday's email supports this:

"It would seem more appropriate to treat RTM information either as:

   o an extension to link attribute information already advertised by the I=
GPs (as has been suggested for OSPF) - which would suggest in IS-IS a sub-T=
LV of TLV 22(et al)

or


*        As an interface attribute independent of routing protocols which c=
ould be retrieved utilizing network management tools"

   Les

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 8:54 AM
To: Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg (gi=
nsberg)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node's RTM capabil=
ities and distribute them to the other nodes is undefined.  Further, one of=
 the ways by which an omniscient controller learns a node's capabilities is=
 by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander=
 Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@e=
citele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.c=
om>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com=
>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I'm sorry but I focused mainly on the OSPF protocol aspects then and didn't=
 question the use case. This question came up in the IS-IS WG discussions.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].







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<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John &#8211;<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">The text you have excerpt=
ed below was trying to say two things:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">1)If you want to advertis=
e this in the IGPs the OSPF style proposal is much better from an implement=
ation standpoint than the IS-IS GENAPP proposal<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">2)There is a larger quest=
ion as to whether we should be using the IGPs for this at all<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Statement #1 should not b=
e interpreted to imply that I am advocating using the IGPs.
</span><span style=3D"font-size:11.0pt;font-family:Wingdings;color:#1F497D"=
>J</span><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">That said, we &#8220;ALWA=
YS&#8221; end up choosing using the IGPs to do this sort of thing &#8211; n=
ot because it is the &#8220;RIGHT&#8221; thing to do architecturally &#8211=
; but because it
 is so convenient.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">I am just asking for folk=
s to pause and think about this a bit more from an architectural perspectiv=
e.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> John E D=
rake [mailto:jdrake@juniper.net]
<br>
<b>Sent:</b> Thursday, January 19, 2017 12:20 PM<br>
<b>To:</b> Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtei=
n; Greg Mirsky<br>
<b>Cc:</b> Robert Sparks; mpls@ietf.org; gen-art@ietf.org; draft-ietf-mpls-=
residence-time.all@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Les,<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Comments inline.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John<o:p></o:p></span></p=
>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> Les Gi=
nsberg (ginsberg) [<a href=3D"mailto:ginsberg@cisco.com">mailto:ginsberg@ci=
sco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 12:25 PM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com"=
>acee@cisco.com</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexand=
er.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
 Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail=
.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John &#8211;<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">For me, this raises the a=
ge-old question of when it is/is not appropriate to use IGPs for flooding i=
nformation.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">This is clearly not TE in=
formation &#8211; you just happen to be using this in conjunction with MPLS=
 &#8211; but it is a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">[JD]&nbsp; RTM supp=
ort as defined in the draft would be used to provide extremely accurate tim=
e synchronization in an MPLS network so I would suggest that
 all nodes in such a network would be using it and hence that it does belon=
g in the IGP.&nbsp; As an aside, advertising it in the IGP facilitates incr=
emental or partial deployment.&nbsp; Your yesterday&#8217;s email supports =
this:&nbsp;
<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">&#8220;It would see=
m more appropriate to treat RTM information either as:<o:p></o:p></span></i=
></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:=
#1F497D"><o:p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:=
#1F497D">&nbsp;&nbsp; o an extension to link attribute information already =
advertised by the IGPs (as has been suggested for OSPF) - which would
 suggest in IS-IS a sub-TLV of TLV 22(et al)<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:=
#1F497D"><o:p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">or<o:p></o:p></span=
></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:=
#1F497D"><o:p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:27.6pt;text-indent:-.25i=
n"><span style=3D"font-size:11.0pt;font-family:Symbol;color:#1F497D">&middo=
t;</span><span style=3D"font-size:7.0pt;color:#1F497D">&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;
</span><b><i><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot=
;,&quot;sans-serif&quot;;color:#1F497D">As an interface attribute independe=
nt of routing protocols which could be retrieved utilizing network manageme=
nt tools&#8221;<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> John E D=
rake [<a href=3D"mailto:jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Acee,<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Relying on an omniscient =
controller is a non-starter in general and in particular because the protoc=
ol by which it would learn each node&#8217;s RTM capabilities
 and distribute them to the other nodes is undefined.&nbsp; Further, one of=
 the ways by which an omniscient controller learns a node&#8217;s capabilit=
ies is by snooping the link/state database.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John<o:p></o:p></span></p=
>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vai=
nshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky =
&lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
 Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg=
@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi John,&nbsp;<o:p></o:p></=
span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">John E Drake &lt;<a href=3D"mailto:jdra=
ke@juniper.net">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@e=
citele.com">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a hr=
ef=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<a hr=
ef=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft=
-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draf=
t-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>=
&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay =
Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<=
br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Acee,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">We discussed all of this =
with you over a year ago and used your guidance in adding the indication of=
 RTM capability to OSPF.</span><span style=3D"color:black"><o:p></o:p></spa=
n></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I&#8217;m sorry but I focus=
ed mainly on the OSPF protocol aspects then and didn&#8217;t question the u=
se case. This question came up in the IS-IS WG discussions.&nbsp;<o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thanks,<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Acee<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,</sp=
an><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&qu=
ot;;color:black"> Acee Lindem (acee) [<a href=3D"mailto:acee@cisco.com">mai=
lto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Gin=
sberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.c=
om</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I guess what we were trying=
 to envision the use case and whether it makes sense for all the nodes in t=
he IGP routing domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Additionally, if it is need=
ed in the IGPs, should there also be a BGP-LS Link Attribute TLV proposed?&=
nbsp;</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thanks,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Acee&nbsp;</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">Alexander Vainshtein &lt;<a href=3D"mai=
lto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&=
gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Hi all,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">I concur with Greg: from =
my POV an interoperable solution should not depend on an omniscient NMS cli=
ent distributing information about capabilities of each
 node to each other node. </span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Regards,</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Sasha</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Office: &#43;972-39266302=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp; &#43;972-549266302</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&qu=
ot;;color:black"> Greg Mirsky [<a href=3D"mailto:gregimirsky@gmail.com">mai=
lto:gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Greg &#8211;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">I am having trouble understanding your =
response.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">The question we are raising is whether =
we should extend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Saying that the IGP functionality is op=
tional and/or wouldn&#8217;t always be advertised doesn&#8217;t really
 answer the question of whether we should or should not define the IGP exte=
nsions.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Could you respond more directly to this=
 point?</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
&quot;sans-serif&quot;;color:black">From:</span></b><span style=3D"font-siz=
e:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;;color:black"=
> Greg
 Mirsky [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">=
gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Greg,&nbsp;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Although it is a bit late, we&#8217;ve ha=
d some discussions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Thanks,</span><span style=3D"color:black"=
><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Acee &nbsp;</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces=
@ietf.org" target=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Gre=
g Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gre=
gimirsky@gmail.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">thank you for the most expedient review a=
nd comments. I'll make changes in Section 2 per your suggestion.</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert =
Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjspar=
ks@nostrum.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">The changes all look good.</span><span style=3D=
"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">I still think you should say something in the d=
ocument about what &quot;the time of packet arrival&quot; and &quot;transmi=
ssion&quot; means, and call out the point you made about being careful to
 not introduce apparent jitter by not making those measurements consistentl=
y. (The definitions you point to in your earlier mail from G.8013 don't rea=
lly help - they just say &quot;time of packet arrival&quot;. Again, the fir=
st and last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">Please look at the new first paragraph of secti=
on 2 - there's a mix of &quot;as case&quot; and &quot;in case&quot; that sh=
ould be made consistent. I suspect it would be easiest to simply say &quot;=
referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">RjS</span><span style=3D"color:black"><o:p></o:=
p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Sasha Vainshtein came with elegant idea t=
o address disconnection between discussion of one-step and
 two-step modes that you've pointed out. We've moved Section 7 as sub-secti=
on into Section 2 now. Attached are updated diff and the proposed new versi=
on -13.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mir=
sky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimir=
sky@gmail.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">once again, thank you for your thorough r=
eview and the most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert S=
parks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjspark=
s@nostrum.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</body>
</html>

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From: John E Drake <jdrake@juniper.net>
To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, "Acee Lindem (acee)" <acee@cisco.com>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Cc: "Abhay Roy \(akr\)" <akr@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, Robert Sparks <rjsparks@nostrum.com>, "ietf@ietf.org" <ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Les,

I understand and I have made the same argument in other contexts and with s=
imilar results ("... and your point is?").

However, as I indicated in my previous email, RTM would be used as part of =
the network infrastructure as a way to provide time synchronization between=
 the nodes in the network, so I would consider it similar to the S-BFDs tha=
t Uma and you were discussing.

Yours Irrespectively,

John

From: Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com]
Sent: Thursday, January 19, 2017 4:09 PM
To: John E Drake <jdrake@juniper.net>; Acee Lindem (acee) <acee@cisco.com>;=
 Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>; Greg Mirsky <greg=
imirsky@gmail.com>
Cc: Robert Sparks <rjsparks@nostrum.com>; mpls@ietf.org; gen-art@ietf.org; =
draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org; isis-chairs@iet=
f.org; Abhay Roy (akr) <akr@cisco.com>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

The text you have excerpted below was trying to say two things:

1)If you want to advertise this in the IGPs the OSPF style proposal is much=
 better from an implementation standpoint than the IS-IS GENAPP proposal

2)There is a larger question as to whether we should be using the IGPs for =
this at all

Statement #1 should not be interpreted to imply that I am advocating using =
the IGPs. :)

That said, we "ALWAYS" end up choosing using the IGPs to do this sort of th=
ing - not because it is the "RIGHT" thing to do architecturally - but becau=
se it is so convenient.

I am just asking for folks to pause and think about this a bit more from an=
 architectural perspective.

   Les


From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 12:20 PM
To: Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtein; Greg=
 Mirsky
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Les,

Comments inline.

Yours Irrespectively,

John

From: Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com]
Sent: Thursday, January 19, 2017 12:25 PM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Acee Lind=
em (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Alexander Vainshtein <Al=
exander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>; G=
reg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

For me, this raises the age-old question of when it is/is not appropriate t=
o use IGPs for flooding information.

This is clearly not TE information - you just happen to be using this in co=
njunction with MPLS - but it is a generic capability. I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities. It a=
lso, as Acee has pointed out, results in flooding information to all nodes =
in the domain when only a few care about it.

[JD]  RTM support as defined in the draft would be used to provide extremel=
y accurate time synchronization in an MPLS network so I would suggest that =
all nodes in such a network would be using it and hence that it does belong=
 in the IGP.  As an aside, advertising it in the IGP facilitates incrementa=
l or partial deployment.  Your yesterday's email supports this:

"It would seem more appropriate to treat RTM information either as:

   o an extension to link attribute information already advertised by the I=
GPs (as has been suggested for OSPF) - which would suggest in IS-IS a sub-T=
LV of TLV 22(et al)

or


*        As an interface attribute independent of routing protocols which c=
ould be retrieved utilizing network management tools"

   Les

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 8:54 AM
To: Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg (gi=
nsberg)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node's RTM capabil=
ities and distribute them to the other nodes is undefined.  Further, one of=
 the ways by which an omniscient controller learns a node's capabilities is=
 by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander=
 Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@e=
citele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.c=
om>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com=
>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I'm sorry but I focused mainly on the OSPF protocol aspects then and didn't=
 question the use case. This question came up in the IS-IS WG discussions.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].







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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Les,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">I understand and I have made the same=
 argument in other contexts and with similar results (&#8220;&#8230; and yo=
ur point is?&#8221;).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">However, as I indicated in my previou=
s email, RTM would be used as part of the network infrastructure as a way t=
o provide time synchronization between the nodes
 in the network, so I would consider it similar to the S-BFDs that Uma and =
you were discussing.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Les Ginsberg (ginsberg) [mailt=
o:ginsberg@cisco.com]
<br>
<b>Sent:</b> Thursday, January 19, 2017 4:09 PM<br>
<b>To:</b> John E Drake &lt;jdrake@juniper.net&gt;; Acee Lindem (acee) &lt;=
acee@cisco.com&gt;; Alexander Vainshtein &lt;Alexander.Vainshtein@ecitele.c=
om&gt;; Greg Mirsky &lt;gregimirsky@gmail.com&gt;<br>
<b>Cc:</b> Robert Sparks &lt;rjsparks@nostrum.com&gt;; mpls@ietf.org; gen-a=
rt@ietf.org; draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org; is=
is-chairs@ietf.org; Abhay Roy (akr) &lt;akr@cisco.com&gt;<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John &#8211;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">The text you have excerpted below was=
 trying to say two things:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">1)If you want to advertise this in th=
e IGPs the OSPF style proposal is much better from an implementation standp=
oint than the IS-IS GENAPP proposal<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">2)There is a larger question as to wh=
ether we should be using the IGPs for this at all<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Statement #1 should not be interprete=
d to imply that I am advocating using the IGPs.
</span><span style=3D"font-size:11.0pt;font-family:Wingdings;color:#1F497D"=
>J</span><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">That said, we &#8220;ALWAYS&#8221; en=
d up choosing using the IGPs to do this sort of thing &#8211; not because i=
t is the &#8220;RIGHT&#8221; thing to do architecturally &#8211; but becaus=
e it is
 so convenient.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">I am just asking for folks to pause a=
nd think about this a bit more from an architectural perspective.<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> John E Drake [<a href=3D"mailto:=
jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 12:20 PM<br>
<b>To:</b> Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtei=
n; Greg Mirsky<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Les,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Comments inline.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Les Ginsberg (ginsberg) [<a hr=
ef=3D"mailto:ginsberg@cisco.com">mailto:ginsberg@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 12:25 PM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com"=
>acee@cisco.com</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexand=
er.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
 Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail=
.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John &#8211;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">For me, this raises the age-old quest=
ion of when it is/is not appropriate to use IGPs for flooding information.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">This is clearly not TE information &#=
8211; you just happen to be using this in conjunction with MPLS &#8211; but=
 it is a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">[JD]&nbsp; RTM support as defin=
ed in the draft would be used to provide extremely accurate time synchroniz=
ation in an MPLS network so I would suggest that all
 nodes in such a network would be using it and hence that it does belong in=
 the IGP.&nbsp; As an aside, advertising it in the IGP facilitates incremen=
tal or partial deployment.&nbsp; Your yesterday&#8217;s email supports this=
:&nbsp;
<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">&#8220;It would seem more appro=
priate to treat RTM information either as:<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:=
p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">&nb=
sp;&nbsp; o an extension to link attribute information already advertised b=
y the IGPs (as has been suggested for OSPF) - which would
 suggest in IS-IS a sub-TLV of TLV 22(et al)<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:=
p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">or<o:p></o:p></span></i></b></p=
>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:=
p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:27.6pt;text-indent:-.25i=
n"><span style=3D"font-size:11.0pt;font-family:Symbol;color:#1F497D">&middo=
t;</span><span style=3D"font-size:7.0pt;color:#1F497D">&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;
</span><b><i><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot=
;,sans-serif;color:#1F497D">As an interface attribute independent of routin=
g protocols which could be retrieved utilizing network management tools&#82=
21;<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> John E Drake [<a href=3D"mailto:=
jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Relying on an omniscient controller i=
s a non-starter in general and in particular because the protocol by which =
it would learn each node&#8217;s RTM capabilities and
 distribute them to the other nodes is undefined.&nbsp; Further, one of the=
 ways by which an omniscient controller learns a node&#8217;s capabilities =
is by snooping the link/state database.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Acee Lindem (acee) [<a href=3D=
"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vai=
nshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky =
&lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
 Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg=
@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi John,&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">John E Drake &lt;<a href=3D"mailto:jdrake@juniper.n=
et">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@e=
citele.com">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a hr=
ef=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<a hr=
ef=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft=
-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draf=
t-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>=
&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay =
Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<=
br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We discussed all of this with you ove=
r a year ago and used your guidance in adding the indication of RTM capabil=
ity to OSPF.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I&#8217;m sorry but I focused mainly on=
 the OSPF protocol aspects then and didn&#8217;t question the use case. Thi=
s question came up in the IS-IS WG discussions.&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Gin=
sberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.c=
om</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I guess what we were trying to envision=
 the use case and whether it makes sense for all the nodes in the IGP routi=
ng domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Additionally, if it is needed in the IG=
Ps, should there also be a BGP-LS Link Attribute TLV proposed?&nbsp;</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee&nbsp;</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Alexander Vainshtein &lt;<a href=3D"mailto:Alexande=
r.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Hi all,</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">I concur with Greg: from my POV an in=
teroperable solution should not depend on an omniscient NMS client distribu=
ting information about capabilities of each node
 to each other node. </span><span style=3D"color:black"><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Regards,</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Sasha</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Office: &#43;972-39266302</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &=
#43;972-549266302</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Greg M=
irsky [<a href=3D"mailto:gregimirsky@gmail.com">mailto:gregimirsky@gmail.co=
m</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Greg &#8211;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">I am having trouble understanding your response.</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The question we are raising is whether we should ex=
tend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Saying that the IGP functionality is optional and/o=
r wouldn&#8217;t always be advertised doesn&#8217;t really answer
 the question of whether we should or should not define the IGP extensions.=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Could you respond more directly to this point?</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black">From:</span></b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black"> Greg Mirsky
 [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimi=
rsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Greg,&nbsp;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Although it is a bit late, we&#8217;ve had some discu=
ssions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Thanks,</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Acee &nbsp;</span><span style=3D"color:black"><o:p></=
o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces@ietf.org" t=
arget=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Greg Mirsky &lt=
;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gma=
il.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">thank you for the most expedient review and comments.=
 I'll make changes in Section 2 per your suggestion.</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks &lt;<=
a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.c=
om</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">The changes all look good.</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">I still think you should say something in the document abou=
t what &quot;the time of packet arrival&quot; and &quot;transmission&quot; =
means, and call out the point you made about being careful to not
 introduce apparent jitter by not making those measurements consistently. (=
The definitions you point to in your earlier mail from G.8013 don't really =
help - they just say &quot;time of packet arrival&quot;. Again, the first a=
nd last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Please look at the new first paragraph of section 2 - there=
's a mix of &quot;as case&quot; and &quot;in case&quot; that should be made=
 consistent. I suspect it would be easiest to simply say &quot;referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">RjS</span><span style=3D"color:black"><o:p></o:p></span></p=
>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</span><span s=
tyle=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Sasha Vainshtein came with elegant idea to address di=
sconnection between discussion of one-step and two-step
 modes that you've pointed out. We've moved Section 7 as sub-section into S=
ection 2 now. Attached are updated diff and the proposed new version -13.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">once again, thank you for your thorough review and th=
e most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks &lt;<a=
 href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>

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From: Uma Chunduri <uma.chunduri@huawei.com>
To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, John E Drake <jdrake@juniper.net>, "Acee Lindem (acee)" <acee@cisco.com>, "Alexander Vainshtein" <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Date: Thu, 19 Jan 2017 21:32:09 +0000
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Les,

I see what you are saying. Quick response in-line [Uma]:

--
Uma C.

From: Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com]
Sent: Thursday, January 19, 2017 12:11 PM
To: Uma Chunduri <uma.chunduri@huawei.com>; John E Drake <jdrake@juniper.ne=
t>; Acee Lindem (acee) <acee@cisco.com>; Alexander Vainshtein <Alexander.Va=
inshtein@ecitele.com>; Greg Mirsky <gregimirsky@gmail.com>
Cc: Abhay Roy (akr) <akr@cisco.com>; mpls@ietf.org; isis-chairs@ietf.org; g=
en-art@ietf.org; draft-ietf-mpls-residence-time.all@ietf.org; Robert Sparks=
 <rjsparks@nostrum.com>; ietf@ietf.org
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Uma -

I readily admit S-BFD descriptors are - strictly speaking - a violation of =
the "non-routing info" policy - this was publicly acknowledged at the time =
the drafts were written. The exception was justified on the basis that:

  o IGPs are BFD clients
  o The S-BFD discriminator information is unique and extremely modest in s=
ize

What we have here is a proposal to start advertising non-routing related in=
terface attribute information. There is nothing special or unique about RTM=
 - it is simply one of many interface attributes which are generic in natur=
e. Having agreed to advertise RTM in the IGPs, how would you then determine=
 what other interface attributes should/should not be advertised by the IGP=
s? Take a look at your favorite vendors box and see how many interface attr=
ibutes can be configured.
[Uma]: Well, depends on the use case.  Here I see this needs to go to egres=
s node too..

It is also concerning that - when using the IGPs - we flood information whi=
ch must be stored on every node even though the use case for it is limited =
to a much smaller subset.
I think we can and should be smarter in this regard - and given the extensi=
ve work being done to enhance manageability I would like to see us benefit =
from this.

The authors of draft-ietf-mpls-residence-time clearly had some thoughts in =
this regard - which is why they proposed to use RFC 6823 (GENAPP) in IS-IS =
to advertise the information -but the proposal in the draft is flawed in th=
is regard. If we were to head in the "application" direction I would propos=
e a much more generic "application" which is capable of advertising many in=
terface attributes. However this goes back to my original concern - whether=
 we want to use IGPs to flood interface attribute information unrelated to =
routing even if it is segregated under an application. Remember that RFC 68=
23 stipulates that a separate instance of the protocol (a la RFC 6822) be u=
sed for such cases.

[Uma]: +1 here. It does require additional instance and which could bring a=
dditional operational overhead here. I didn't bring this in because as the =
discussion is more about if this should be in IGP. I do prefer to match thi=
s to section 8.2 equivalent i.e., 22/222/23/223.

   Les


From: Uma Chunduri [mailto:uma.chunduri@huawei.com]
Sent: Thursday, January 19, 2017 11:41 AM
To: Les Ginsberg (ginsberg); John E Drake; Acee Lindem (acee); Alexander Va=
inshtein; Greg Mirsky
Cc: Abhay Roy (akr); mpls@ietf.org<mailto:mpls@ietf.org>; isis-chairs@ietf.=
org<mailto:isis-chairs@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>=
; draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-reside=
nce-time.all@ietf.org>; Robert Sparks; ietf@ietf.org<mailto:ietf@ietf.org>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

I support advertising this in IGP.


>This is clearly not TE information -..
>I do not see the IGPs as the appropriate mechanism to flood generic interf=
ace capabilities

We have instances where both the above are not met and we flooded informati=
on.
https://tools.ietf.org/html/rfc7883 (Les, you co-authored the same!!)
https://tools.ietf.org/html/rfc7880

--
Uma C.

From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Les Ginsberg (ginsbe=
rg)
Sent: Thursday, January 19, 2017 9:25 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Acee Lind=
em (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Alexander Vainshtein <Al=
exander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>; G=
reg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>; mpls@ietf.org<ma=
ilto:mpls@ietf.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; gen=
-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@=
ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>; Robert Sparks=
 <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; ietf@ietf.org<mailto:=
ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

For me, this raises the age-old question of when it is/is not appropriate t=
o use IGPs for flooding information.

This is clearly not TE information - you just happen to be using this in co=
njunction with MPLS - but it is a generic capability. I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities. It a=
lso, as Acee has pointed out, results in flooding information to all nodes =
in the domain when only a few care about it.

   Les

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 8:54 AM
To: Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg (gi=
nsberg)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node's RTM capabil=
ities and distribute them to the other nodes is undefined.  Further, one of=
 the ways by which an omniscient controller learns a node's capabilities is=
 by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander=
 Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@e=
citele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.c=
om>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com=
>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I'm sorry but I focused mainly on the OSPF protocol aspects then and didn't=
 question the use case. This question came up in the IS-IS WG discussions.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].







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<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Les,<o:p>=
</o:p></span></a></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">I see what you are saying. Quick resp=
onse in-line [Uma]:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">--</span><span style=3D"font-size:11.=
0pt;font-family:&quot;Freestyle Script&quot;;color:#1F497D"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Uma C.</span><span style=3D"font-size=
:11.0pt;font-family:&quot;Brush Script MT&quot;;color:#1F497D"><o:p></o:p><=
/span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Les Ginsberg (ginsberg) [mailt=
o:ginsberg@cisco.com]
<br>
<b>Sent:</b> Thursday, January 19, 2017 12:11 PM<br>
<b>To:</b> Uma Chunduri &lt;uma.chunduri@huawei.com&gt;; John E Drake &lt;j=
drake@juniper.net&gt;; Acee Lindem (acee) &lt;acee@cisco.com&gt;; Alexander=
 Vainshtein &lt;Alexander.Vainshtein@ecitele.com&gt;; Greg Mirsky &lt;gregi=
mirsky@gmail.com&gt;<br>
<b>Cc:</b> Abhay Roy (akr) &lt;akr@cisco.com&gt;; mpls@ietf.org; isis-chair=
s@ietf.org; gen-art@ietf.org; draft-ietf-mpls-residence-time.all@ietf.org; =
Robert Sparks &lt;rjsparks@nostrum.com&gt;; ietf@ietf.org<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Uma &#8211;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">I readily admit S-BFD descriptors are=
 &#8211; strictly speaking - a violation of the &#8220;non-routing info&#82=
21; policy &#8211; this was publicly acknowledged at the time the drafts
 were written. The exception was justified on the basis that:<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp; o IGPs are BFD clients<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp; o The S-BFD discriminator info=
rmation is unique and extremely modest in size<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">What w=
e have here is a proposal to start advertising non-routing related interfac=
e attribute information. There is nothing special
 or unique about RTM &#8211; it is simply one of many interface attributes =
which are generic in nature. Having agreed to advertise RTM in the IGPs, ho=
w would you then determine what other interface attributes should/should no=
t be advertised by the IGPs? Take a look
 at your favorite vendors box and see how many interface attributes can be =
configured.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">[Uma]: Well, depends=
 on the use case.&nbsp; Here I see this needs to go to egress node too..<o:=
p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&=
nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">It is also concerning that &#8211; wh=
en using the IGPs &#8211; we flood information which must be stored on ever=
y node even though the use case for it is limited to a much
 smaller subset.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">I think we can and should be smarter =
in this regard &#8211; and given the extensive work being done to enhance m=
anageability I would like to see us benefit from this.<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">The authors of draft-ietf-mpls-reside=
nce-time clearly had some thoughts in this regard &#8211; which is why they=
 proposed to use RFC 6823 (GENAPP) in IS-IS to advertise
 the information &#8211;but the proposal in the draft is flawed in this reg=
ard. If we were to head in the &#8220;application&#8221; direction I would =
propose a much more generic &#8220;application&#8221; which is capable of a=
dvertising many interface attributes. However this goes back to
 my original concern &#8211; whether we want to use IGPs to flood interface=
 attribute information unrelated to routing even if it is segregated under =
an application. Remember that RFC 6823 stipulates that a separate instance =
of the protocol (a la RFC 6822) be used
 for such cases.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">[Uma]: &#43;1 here. It does require additional inst=
ance and which could bring additional operational overhead here. I didn&#82=
17;t bring this in because as the discussion is more about
 if this should be in IGP. I do prefer to match this to section 8.2 equival=
ent i.e., 22/222/23/223.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Uma Chunduri [</span><a href=3D"=
mailto:uma.chunduri@huawei.com"><span style=3D"font-size:10.0pt;font-family=
:&quot;Tahoma&quot;,sans-serif">mailto:uma.chunduri@huawei.com</span></a><s=
pan style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:41 AM<br>
<b>To:</b> Les Ginsberg (ginsberg); John E Drake; Acee Lindem (acee); Alexa=
nder Vainshtein; Greg Mirsky<br>
<b>Cc:</b> Abhay Roy (akr); </span><a href=3D"mailto:mpls@ietf.org"><span s=
tyle=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">mpls@ie=
tf.org</span></a><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&q=
uot;,sans-serif">;
</span><a href=3D"mailto:isis-chairs@ietf.org"><span style=3D"font-size:10.=
0pt;font-family:&quot;Tahoma&quot;,sans-serif">isis-chairs@ietf.org</span><=
/a><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-seri=
f">;
</span><a href=3D"mailto:gen-art@ietf.org"><span style=3D"font-size:10.0pt;=
font-family:&quot;Tahoma&quot;,sans-serif">gen-art@ietf.org</span></a><span=
 style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">;
</span><a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org"><span=
 style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">draft=
-ietf-mpls-residence-time.all@ietf.org</span></a><span style=3D"font-size:1=
0.0pt;font-family:&quot;Tahoma&quot;,sans-serif">; Robert
 Sparks; </span><a href=3D"mailto:ietf@ietf.org"><span style=3D"font-size:1=
0.0pt;font-family:&quot;Tahoma&quot;,sans-serif">ietf@ietf.org</span></a><s=
pan style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif"><b=
r>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">I support advertising this in IGP.<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&gt;This is clearly not TE informatio=
n &#8211;..<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&gt;I do not see the IGPs as the appr=
opriate mechanism to flood generic interface capabilities<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We have instances where both the abov=
e are not met and we flooded information.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><a href=3D"https://tools.ietf.org/html/rfc7883"><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">htt=
ps://tools.ietf.org/html/rfc7883</span></a><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> (Les,
 you co-authored the same!!)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><a href=3D"https://tools.ietf.org/html/rfc7880"><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">htt=
ps://tools.ietf.org/html/rfc7880</span></a><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">--</span><span style=3D"font-size:11.=
0pt;font-family:&quot;Freestyle Script&quot;;color:#1F497D"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Uma C.</span><span style=3D"font-size=
:11.0pt;font-family:&quot;Brush Script MT&quot;;color:#1F497D"><o:p></o:p><=
/span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> mpls [</span><a href=3D"mailto=
:mpls-bounces@ietf.org"><span style=3D"font-size:11.0pt;font-family:&quot;C=
alibri&quot;,sans-serif">mailto:mpls-bounces@ietf.org</span></a><span style=
=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">]
<b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
<b>Sent:</b> Thursday, January 19, 2017 9:25 AM<br>
<b>To:</b> John E Drake &lt;</span><a href=3D"mailto:jdrake@juniper.net"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">j=
drake@juniper.net</span></a><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif">&gt;; Acee Lindem (acee) &lt;</span><a href=3D=
"mailto:acee@cisco.com"><span style=3D"font-size:11.0pt;font-family:&quot;C=
alibri&quot;,sans-serif">acee@cisco.com</span></a><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif">&gt;;
 Alexander Vainshtein &lt;</span><a href=3D"mailto:Alexander.Vainshtein@eci=
tele.com"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,s=
ans-serif">Alexander.Vainshtein@ecitele.com</span></a><span style=3D"font-s=
ize:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">&gt;; Greg
 Mirsky &lt;</span><a href=3D"mailto:gregimirsky@gmail.com"><span style=3D"=
font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">gregimirsky@gm=
ail.com</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri=
&quot;,sans-serif">&gt;<br>
<b>Cc:</b> Abhay Roy (akr) &lt;</span><a href=3D"mailto:akr@cisco.com"><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">akr=
@cisco.com</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Cali=
bri&quot;,sans-serif">&gt;;
</span><a href=3D"mailto:mpls@ietf.org"><span style=3D"font-size:11.0pt;fon=
t-family:&quot;Calibri&quot;,sans-serif">mpls@ietf.org</span></a><span styl=
e=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">;
</span><a href=3D"mailto:isis-chairs@ietf.org"><span style=3D"font-size:11.=
0pt;font-family:&quot;Calibri&quot;,sans-serif">isis-chairs@ietf.org</span>=
</a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-se=
rif">;
</span><a href=3D"mailto:gen-art@ietf.org"><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif">gen-art@ietf.org</span></a><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">;
</span><a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org"><span=
 style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">draf=
t-ietf-mpls-residence-time.all@ietf.org</span></a><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif">; Robert
 Sparks &lt;</span><a href=3D"mailto:rjsparks@nostrum.com"><span style=3D"f=
ont-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">rjsparks@nostru=
m.com</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&q=
uot;,sans-serif">&gt;;
</span><a href=3D"mailto:ietf@ietf.org"><span style=3D"font-size:11.0pt;fon=
t-family:&quot;Calibri&quot;,sans-serif">ietf@ietf.org</span></a><span styl=
e=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John &#8211;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">For me, this raises the age-old quest=
ion of when it is/is not appropriate to use IGPs for flooding information.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">This is clearly not TE information &#=
8211; you just happen to be using this in conjunction with MPLS &#8211; but=
 it is a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> John E Drake [</span><a href=3D"=
mailto:jdrake@juniper.net"><span style=3D"font-size:10.0pt;font-family:&quo=
t;Tahoma&quot;,sans-serif">mailto:jdrake@juniper.net</span></a><span style=
=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; </span><a href=3D"mailto:mpls@ietf.org"><span sty=
le=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">mpls@ietf=
.org</span></a><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quo=
t;,sans-serif">;
</span><a href=3D"mailto:gen-art@ietf.org"><span style=3D"font-size:10.0pt;=
font-family:&quot;Tahoma&quot;,sans-serif">gen-art@ietf.org</span></a><span=
 style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">;
</span><a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org"><span=
 style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">draft=
-ietf-mpls-residence-time.all@ietf.org</span></a><span style=3D"font-size:1=
0.0pt;font-family:&quot;Tahoma&quot;,sans-serif">;
</span><a href=3D"mailto:ietf@ietf.org"><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif">ietf@ietf.org</span></a><span style=
=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">;
</span><a href=3D"mailto:isis-chairs@ietf.org"><span style=3D"font-size:10.=
0pt;font-family:&quot;Tahoma&quot;,sans-serif">isis-chairs@ietf.org</span><=
/a><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-seri=
f">; Abhay Roy (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Relying on an omniscient controller i=
s a non-starter in general and in particular because the protocol by which =
it would learn each node&#8217;s RTM capabilities and
 distribute them to the other nodes is undefined.&nbsp; Further, one of the=
 ways by which an omniscient controller learns a node&#8217;s capabilities =
is by snooping the link/state database.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Acee Lindem (acee) [</span><a =
href=3D"mailto:acee@cisco.com"><span style=3D"font-size:11.0pt;font-family:=
&quot;Calibri&quot;,sans-serif">mailto:acee@cisco.com</span></a><span style=
=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;</span><a href=3D"mailto:jdrake@juniper.net"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">j=
drake@juniper.net</span></a><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif">&gt;; Alexander Vainshtein &lt;</span><a href=
=3D"mailto:Alexander.Vainshtein@ecitele.com"><span style=3D"font-size:11.0p=
t;font-family:&quot;Calibri&quot;,sans-serif">Alexander.Vainshtein@ecitele.=
com</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quo=
t;,sans-serif">&gt;;
 Greg Mirsky &lt;</span><a href=3D"mailto:gregimirsky@gmail.com"><span styl=
e=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">gregimirs=
ky@gmail.com</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&gt;; Les Ginsberg (ginsberg) &lt;</span><a href=3D=
"mailto:ginsberg@cisco.com"><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif">ginsberg@cisco.com</span></a><span style=3D"fo=
nt-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">&gt;<br>
<b>Cc:</b> Robert Sparks &lt;</span><a href=3D"mailto:rjsparks@nostrum.com"=
><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif=
">rjsparks@nostrum.com</span></a><span style=3D"font-size:11.0pt;font-famil=
y:&quot;Calibri&quot;,sans-serif">&gt;;
</span><a href=3D"mailto:mpls@ietf.org"><span style=3D"font-size:11.0pt;fon=
t-family:&quot;Calibri&quot;,sans-serif">mpls@ietf.org</span></a><span styl=
e=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">;
</span><a href=3D"mailto:gen-art@ietf.org"><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif">gen-art@ietf.org</span></a><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">;
</span><a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org"><span=
 style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">draf=
t-ietf-mpls-residence-time.all@ietf.org</span></a><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif">;
</span><a href=3D"mailto:ietf@ietf.org"><span style=3D"font-size:11.0pt;fon=
t-family:&quot;Calibri&quot;,sans-serif">ietf@ietf.org</span></a><span styl=
e=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">;
</span><a href=3D"mailto:isis-chairs@ietf.org"><span style=3D"font-size:11.=
0pt;font-family:&quot;Calibri&quot;,sans-serif">isis-chairs@ietf.org</span>=
</a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-se=
rif">; Abhay Roy (akr) &lt;</span><a href=3D"mailto:akr@cisco.com"><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">akr@cis=
co.com</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&=
quot;,sans-serif">&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi John,&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">John E Drake &lt;</span><a href=3D"mailto:jdrake@ju=
niper.net"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif">jdrake@juniper.net</span></a><span style=3D"font-size:11.0pt;fo=
nt-family:&quot;Calibri&quot;,sans-serif;color:black">&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;</span><a href=3D"mailto:acee@cisco.com"><span s=
tyle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">acee@c=
isco.com</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Calibr=
i&quot;,sans-serif;color:black">&gt;, Alexander Vainshtein &lt;</span><a hr=
ef=3D"mailto:Alexander.Vainshtein@ecitele.com"><span style=3D"font-size:11.=
0pt;font-family:&quot;Calibri&quot;,sans-serif">Alexander.Vainshtein@ecitel=
e.com</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&q=
uot;,sans-serif;color:black">&gt;,
 Greg Mirsky &lt;</span><a href=3D"mailto:gregimirsky@gmail.com"><span styl=
e=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">gregimirs=
ky@gmail.com</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&gt;, &quot;Les Ginsberg (ginsberg)&quo=
t;
 &lt;</span><a href=3D"mailto:ginsberg@cisco.com"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif">ginsberg@cisco.com</span=
></a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-s=
erif;color:black">&gt;<br>
<b>Cc: </b>Robert Sparks &lt;</span><a href=3D"mailto:rjsparks@nostrum.com"=
><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif=
">rjsparks@nostrum.com</span></a><span style=3D"font-size:11.0pt;font-famil=
y:&quot;Calibri&quot;,sans-serif;color:black">&gt;, &quot;</span><a href=3D=
"mailto:mpls@ietf.org"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">mpls@ietf.org</span></a><span style=3D"font-size:11=
.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">&quot;
 &lt;</span><a href=3D"mailto:mpls@ietf.org"><span style=3D"font-size:11.0p=
t;font-family:&quot;Calibri&quot;,sans-serif">mpls@ietf.org</span></a><span=
 style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color=
:black">&gt;, &quot;</span><a href=3D"mailto:gen-art@ietf.org"><span style=
=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">gen-art@ie=
tf.org</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&=
quot;,sans-serif;color:black">&quot;
 &lt;</span><a href=3D"mailto:gen-art@ietf.org"><span style=3D"font-size:11=
.0pt;font-family:&quot;Calibri&quot;,sans-serif">gen-art@ietf.org</span></a=
><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif=
;color:black">&gt;, &quot;</span><a href=3D"mailto:draft-ietf-mpls-residenc=
e-time.all@ietf.org"><span style=3D"font-size:11.0pt;font-family:&quot;Cali=
bri&quot;,sans-serif">draft-ietf-mpls-residence-time.all@ietf.org</span></a=
><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif=
;color:black">&quot;
 &lt;</span><a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">=
<span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"=
>draft-ietf-mpls-residence-time.all@ietf.org</span></a><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">&gt;,
 &quot;</span><a href=3D"mailto:ietf@ietf.org"><span style=3D"font-size:11.=
0pt;font-family:&quot;Calibri&quot;,sans-serif">ietf@ietf.org</span></a><sp=
an style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;col=
or:black">&quot; &lt;</span><a href=3D"mailto:ietf@ietf.org"><span style=3D=
"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">ietf@ietf.org=
</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">&gt;,
 &quot;</span><a href=3D"mailto:isis-chairs@ietf.org"><span style=3D"font-s=
ize:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">isis-chairs@ietf.org=
</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">&quot; &lt;</span><a href=3D"mailto:isis-chairs@iet=
f.org"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans=
-serif">isis-chairs@ietf.org</span></a><span style=3D"font-size:11.0pt;font=
-family:&quot;Calibri&quot;,sans-serif;color:black">&gt;,
 &quot;Abhay Roy (akr)&quot; &lt;</span><a href=3D"mailto:akr@cisco.com"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">a=
kr@cisco.com</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We discussed all of this with you ove=
r a year ago and used your guidance in adding the indication of RTM capabil=
ity to OSPF.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I&#8217;m sorry but I focused mainly on=
 the OSPF protocol aspects then and didn&#8217;t question the use case. Thi=
s question came up in the IS-IS WG discussions.&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Acee L=
indem (acee) [</span><a href=3D"mailto:acee@cisco.com"><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">mailto:acee@cisco.c=
om</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot=
;,sans-serif;color:black">]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;</span><a href=3D"mailto:Alexander.Vain=
shtein@ecitele.com"><span style=3D"font-size:11.0pt;font-family:&quot;Calib=
ri&quot;,sans-serif">Alexander.Vainshtein@ecitele.com</span></a><span style=
=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black=
">&gt;;
 Greg Mirsky &lt;</span><a href=3D"mailto:gregimirsky@gmail.com"><span styl=
e=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">gregimirs=
ky@gmail.com</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&gt;; Les Ginsberg (ginsberg)
 &lt;</span><a href=3D"mailto:ginsberg@cisco.com"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif">ginsberg@cisco.com</span=
></a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-s=
erif;color:black">&gt;<br>
<b>Cc:</b> Robert Sparks &lt;</span><a href=3D"mailto:rjsparks@nostrum.com"=
><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif=
">rjsparks@nostrum.com</span></a><span style=3D"font-size:11.0pt;font-famil=
y:&quot;Calibri&quot;,sans-serif;color:black">&gt;;
</span><a href=3D"mailto:mpls@ietf.org"><span style=3D"font-size:11.0pt;fon=
t-family:&quot;Calibri&quot;,sans-serif">mpls@ietf.org</span></a><span styl=
e=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:blac=
k">;
</span><a href=3D"mailto:gen-art@ietf.org"><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif">gen-art@ietf.org</span></a><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;colo=
r:black">;
</span><a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org"><span=
 style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">draf=
t-ietf-mpls-residence-time.all@ietf.org</span></a><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">;
</span><a href=3D"mailto:ietf@ietf.org"><span style=3D"font-size:11.0pt;fon=
t-family:&quot;Calibri&quot;,sans-serif">ietf@ietf.org</span></a><span styl=
e=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:blac=
k">;
</span><a href=3D"mailto:isis-chairs@ietf.org"><span style=3D"font-size:11.=
0pt;font-family:&quot;Calibri&quot;,sans-serif">isis-chairs@ietf.org</span>=
</a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-se=
rif;color:black">; Abhay Roy (akr) &lt;</span><a href=3D"mailto:akr@cisco.c=
om"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-se=
rif">akr@cisco.com</span></a><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:black">&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I guess what we were trying to envision=
 the use case and whether it makes sense for all the nodes in the IGP routi=
ng domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Additionally, if it is needed in the IG=
Ps, should there also be a BGP-LS Link Attribute TLV proposed?&nbsp;</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee&nbsp;</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Alexander Vainshtein &lt;</span><a href=3D"mailto:A=
lexander.Vainshtein@ecitele.com"><span style=3D"font-size:11.0pt;font-famil=
y:&quot;Calibri&quot;,sans-serif">Alexander.Vainshtein@ecitele.com</span></=
a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-seri=
f;color:black">&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;</span><a href=3D"mailto:gregimirsky@gmail.com">=
<span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"=
>gregimirsky@gmail.com</span></a><span style=3D"font-size:11.0pt;font-famil=
y:&quot;Calibri&quot;,sans-serif;color:black">&gt;, &quot;Les Ginsberg
 (ginsberg)&quot; &lt;</span><a href=3D"mailto:ginsberg@cisco.com"><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">ginsber=
g@cisco.com</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,sans-serif;color:black">&gt;<br>
<b>Cc: </b>Acee Lindem &lt;</span><a href=3D"mailto:acee@cisco.com"><span s=
tyle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">acee@c=
isco.com</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Calibr=
i&quot;,sans-serif;color:black">&gt;, Robert Sparks &lt;</span><a href=3D"m=
ailto:rjsparks@nostrum.com"><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif">rjsparks@nostrum.com</span></a><span style=3D"=
font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">&g=
t;,
 &quot;</span><a href=3D"mailto:mpls@ietf.org"><span style=3D"font-size:11.=
0pt;font-family:&quot;Calibri&quot;,sans-serif">mpls@ietf.org</span></a><sp=
an style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;col=
or:black">&quot; &lt;</span><a href=3D"mailto:mpls@ietf.org"><span style=3D=
"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">mpls@ietf.org=
</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">&gt;,
 &quot;</span><a href=3D"mailto:gen-art@ietf.org"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif">gen-art@ietf.org</span><=
/a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">&quot; &lt;</span><a href=3D"mailto:gen-art@ietf.org"><span=
 style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">gen-=
art@ietf.org</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&gt;,
 &quot;</span><a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org=
"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-seri=
f">draft-ietf-mpls-residence-time.all@ietf.org</span></a><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">&quot=
;
 &lt;</span><a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">=
<span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"=
>draft-ietf-mpls-residence-time.all@ietf.org</span></a><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">&gt;,
 &quot;</span><a href=3D"mailto:ietf@ietf.org"><span style=3D"font-size:11.=
0pt;font-family:&quot;Calibri&quot;,sans-serif">ietf@ietf.org</span></a><sp=
an style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;col=
or:black">&quot; &lt;</span><a href=3D"mailto:ietf@ietf.org"><span style=3D=
"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">ietf@ietf.org=
</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">&gt;,
 &quot;</span><a href=3D"mailto:isis-chairs@ietf.org"><span style=3D"font-s=
ize:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">isis-chairs@ietf.org=
</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">&quot; &lt;</span><a href=3D"mailto:isis-chairs@iet=
f.org"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans=
-serif">isis-chairs@ietf.org</span></a><span style=3D"font-size:11.0pt;font=
-family:&quot;Calibri&quot;,sans-serif;color:black">&gt;,
 &quot;Abhay Roy (akr)&quot; &lt;</span><a href=3D"mailto:akr@cisco.com"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">a=
kr@cisco.com</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Hi all,</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">I concur with Greg: from my POV an in=
teroperable solution should not depend on an omniscient NMS client distribu=
ting information about capabilities of each node
 to each other node. </span><span style=3D"color:black"><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Regards,</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Sasha</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Office: &#43;972-39266302</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &=
#43;972-549266302</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Email:&nbsp;&nbsp;
</span><a href=3D"mailto:Alexander.Vainshtein@ecitele.com"><span style=3D"f=
ont-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">Alexander.Vains=
htein@ecitele.com</span></a><span style=3D"color:black"><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Greg M=
irsky [</span><a href=3D"mailto:gregimirsky@gmail.com"><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">mailto:gregimirsky@=
gmail.com</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Calib=
ri&quot;,sans-serif;color:black">]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;</span><a href=3D"mailto:ginsberg@ci=
sco.com"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif">ginsberg@cisco.com</span></a><span style=3D"font-size:11.0pt;font=
-family:&quot;Calibri&quot;,sans-serif;color:black">&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;</span><a href=3D"mailto:acee@cisco.com">=
<span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"=
>acee@cisco.com</span></a><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">&gt;; Robert Sparks &lt;</span><a hr=
ef=3D"mailto:rjsparks@nostrum.com"><span style=3D"font-size:11.0pt;font-fam=
ily:&quot;Calibri&quot;,sans-serif">rjsparks@nostrum.com</span></a><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:bl=
ack">&gt;;
</span><a href=3D"mailto:mpls@ietf.org"><span style=3D"font-size:11.0pt;fon=
t-family:&quot;Calibri&quot;,sans-serif">mpls@ietf.org</span></a><span styl=
e=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:blac=
k">;
</span><a href=3D"mailto:gen-art@ietf.org"><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif">gen-art@ietf.org</span></a><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;colo=
r:black">;
</span><a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org"><span=
 style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">draf=
t-ietf-mpls-residence-time.all@ietf.org</span></a><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">;
</span><a href=3D"mailto:ietf@ietf.org"><span style=3D"font-size:11.0pt;fon=
t-family:&quot;Calibri&quot;,sans-serif">ietf@ietf.org</span></a><span styl=
e=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:blac=
k">;
</span><a href=3D"mailto:isis-chairs@ietf.org"><span style=3D"font-size:11.=
0pt;font-family:&quot;Calibri&quot;,sans-serif">isis-chairs@ietf.org</span>=
</a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-se=
rif;color:black">; Abhay Roy (akr) &lt;</span><a href=3D"mailto:akr@cisco.c=
om"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-se=
rif">akr@cisco.com</span></a><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:black">&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;</span><a href=3D"mailto:ginsberg@cisc=
o.com" target=3D"_blank">ginsberg@cisco.com</a><span style=3D"color:black">=
&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Greg &#8211;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">I am having trouble understanding your response.</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The question we are raising is whether we should ex=
tend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Saying that the IGP functionality is optional and/o=
r wouldn&#8217;t always be advertised doesn&#8217;t really answer
 the question of whether we should or should not define the IGP extensions.=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Could you respond more directly to this point?</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black">From:</span></b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black"> Greg Mirsky
 [mailto:</span><a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">=
<span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">=
gregimirsky@gmail.com</span></a><span style=3D"font-size:10.0pt;font-family=
:&quot;Tahoma&quot;,sans-serif;color:black">]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; </span><a href=3D"mailto:mpls@ietf.org" target=3D=
"_blank"><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,san=
s-serif">mpls@ietf.org</span></a><span style=3D"font-size:10.0pt;font-famil=
y:&quot;Tahoma&quot;,sans-serif;color:black">;
</span><a href=3D"mailto:gen-art@ietf.org" target=3D"_blank"><span style=3D=
"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">gen-art@ietf.o=
rg</span></a><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;=
,sans-serif;color:black">;
</span><a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank"><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;=
,sans-serif">draft-ietf-mpls-residence-time.all@ietf.org</span></a><span st=
yle=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:bla=
ck">;
</span><a href=3D"mailto:ietf@ietf.org" target=3D"_blank"><span style=3D"fo=
nt-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">ietf@ietf.org</sp=
an></a><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-=
serif;color:black">; Les Ginsberg (ginsberg);
</span><a href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank"><span styl=
e=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">isis-chair=
s@ietf.org</span></a><span style=3D"font-size:10.0pt;font-family:&quot;Taho=
ma&quot;,sans-serif;color:black">; Abhay Roy (akr)</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;</span><a href=3D"mailto:acee@cisco.com" target=3D"_blank=
">acee@cisco.com</a><span style=3D"color:black">&gt;
 wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Greg,&nbsp;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Although it is a bit late, we&#8217;ve had some discu=
ssions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Thanks,</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Acee &nbsp;</span><span style=3D"color:black"><o:p></=
o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">mpls &lt;</span><a href=3D"mailto:mpls-bounces@ietf=
.org" target=3D"_blank"><span style=3D"font-size:11.0pt;font-family:&quot;C=
alibri&quot;,sans-serif">mpls-bounces@ietf.org</span></a><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">&gt;
 on behalf of Greg Mirsky &lt;</span><a href=3D"mailto:gregimirsky@gmail.co=
m" target=3D"_blank"><span style=3D"font-size:11.0pt;font-family:&quot;Cali=
bri&quot;,sans-serif">gregimirsky@gmail.com</span></a><span style=3D"font-s=
ize:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;</span><a href=3D"mailto:rjsparks@nostrum.com"=
 target=3D"_blank"><span style=3D"font-size:11.0pt;font-family:&quot;Calibr=
i&quot;,sans-serif">rjsparks@nostrum.com</span></a><span style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">&gt;<br>
<b>Cc: </b>&quot;</span><a href=3D"mailto:mpls@ietf.org" target=3D"_blank">=
<span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"=
>mpls@ietf.org</span></a><span style=3D"font-size:11.0pt;font-family:&quot;=
Calibri&quot;,sans-serif;color:black">&quot; &lt;</span><a href=3D"mailto:m=
pls@ietf.org" target=3D"_blank"><span style=3D"font-size:11.0pt;font-family=
:&quot;Calibri&quot;,sans-serif">mpls@ietf.org</span></a><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">&gt;,
 &quot;</span><a href=3D"mailto:gen-art@ietf.org" target=3D"_blank"><span s=
tyle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">gen-ar=
t@ietf.org</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Cali=
bri&quot;,sans-serif;color:black">&quot; &lt;</span><a href=3D"mailto:gen-a=
rt@ietf.org" target=3D"_blank"><span style=3D"font-size:11.0pt;font-family:=
&quot;Calibri&quot;,sans-serif">gen-art@ietf.org</span></a><span style=3D"f=
ont-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">&gt=
;,
 &quot;</span><a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org=
" target=3D"_blank"><span style=3D"font-size:11.0pt;font-family:&quot;Calib=
ri&quot;,sans-serif">draft-ietf-mpls-residence-time.all@ietf.org</span></a>=
<span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;=
color:black">&quot;
 &lt;</span><a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" =
target=3D"_blank"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri=
&quot;,sans-serif">draft-ietf-mpls-residence-time.all@ietf.org</span></a><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;co=
lor:black">&gt;,
 &quot;</span><a href=3D"mailto:ietf@ietf.org" target=3D"_blank"><span styl=
e=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">ietf@ietf=
.org</span></a><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&qu=
ot;,sans-serif;color:black">&quot; &lt;</span><a href=3D"mailto:ietf@ietf.o=
rg" target=3D"_blank"><span style=3D"font-size:11.0pt;font-family:&quot;Cal=
ibri&quot;,sans-serif">ietf@ietf.org</span></a><span style=3D"font-size:11.=
0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">&gt;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">thank you for the most expedient review and comments.=
 I'll make changes in Section 2 per your suggestion.</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks &lt;<=
/span><a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank"><span style=
=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif">rjsparks@n=
ostrum.com</span></a><span style=3D"font-size:10.5pt;font-family:&quot;Cali=
bri&quot;,sans-serif;color:black">&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">The changes all look good.</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">I still think you should say something in the document abou=
t what &quot;the time of packet arrival&quot; and &quot;transmission&quot; =
means, and call out the point you made about being careful to not
 introduce apparent jitter by not making those measurements consistently. (=
The definitions you point to in your earlier mail from G.8013 don't really =
help - they just say &quot;time of packet arrival&quot;. Again, the first a=
nd last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Please look at the new first paragraph of section 2 - there=
's a mix of &quot;as case&quot; and &quot;in case&quot; that should be made=
 consistent. I suspect it would be easiest to simply say &quot;referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">RjS</span><span style=3D"color:black"><o:p></o:p></span></p=
>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</span><span s=
tyle=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Sasha Vainshtein came with elegant idea to address di=
sconnection between discussion of one-step and two-step
 modes that you've pointed out. We've moved Section 7 as sub-section into S=
ection 2 now. Attached are updated diff and the proposed new version -13.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky &lt;</sp=
an><a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank"><span style=
=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif">gregimirsk=
y@gmail.com</span></a><span style=3D"font-size:10.5pt;font-family:&quot;Cal=
ibri&quot;,sans-serif;color:black">&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">once again, thank you for your thorough review and th=
e most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks &lt;</=
span><a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank"><span style=
=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif">rjsparks@n=
ostrum.com</span></a><span style=3D"font-size:10.5pt;font-family:&quot;Cali=
bri&quot;,sans-serif;color:black">&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;</span><a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=
=3D"_blank"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;=
,sans-serif">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</span></a><span =
style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:=
black">&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</body>
</html>

--_000_25B4902B1192E84696414485F5726854018778F8dfweml501mbb_--


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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: John E Drake <jdrake@juniper.net>, "Acee Lindem (acee)" <acee@cisco.com>,  Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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John -

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 1:19 PM
To: Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtein; Greg=
 Mirsky
Cc: Robert Sparks; mpls@ietf.org; gen-art@ietf.org; draft-ietf-mpls-residen=
ce-time.all@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Les,

I understand and I have made the same argument in other contexts and with s=
imilar results ("... and your point is?").
[Les:] Nice to know I am not completely alone.:-)

It would be good if the authors/WG at least considered a non-IGP approach.
However, if the IGP approach is to be taken, the GENINFO definition current=
ly in the draft is unacceptable for reasons I have previously given. So thi=
s should be reworked - probably to use a sub-TLV of TLV 22 et al.
The other alternative would be to define a GENINFO application that could s=
upport advertising many interface attributes - I don't think anyone wants t=
o go in that direction - certainly not me.

   Les


However, as I indicated in my previous email, RTM would be used as part of =
the network infrastructure as a way to provide time synchronization between=
 the nodes in the network, so I would consider it similar to the S-BFDs tha=
t Uma and you were discussing.

Yours Irrespectively,

John

From: Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com]
Sent: Thursday, January 19, 2017 4:09 PM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Acee Lind=
em (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Alexander Vainshtein <Al=
exander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>; G=
reg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

The text you have excerpted below was trying to say two things:

1)If you want to advertise this in the IGPs the OSPF style proposal is much=
 better from an implementation standpoint than the IS-IS GENAPP proposal

2)There is a larger question as to whether we should be using the IGPs for =
this at all

Statement #1 should not be interpreted to imply that I am advocating using =
the IGPs. :)

That said, we "ALWAYS" end up choosing using the IGPs to do this sort of th=
ing - not because it is the "RIGHT" thing to do architecturally - but becau=
se it is so convenient.

I am just asking for folks to pause and think about this a bit more from an=
 architectural perspective.

   Les


From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 12:20 PM
To: Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtein; Greg=
 Mirsky
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Les,

Comments inline.

Yours Irrespectively,

John

From: Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com]
Sent: Thursday, January 19, 2017 12:25 PM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Acee Lind=
em (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Alexander Vainshtein <Al=
exander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>; G=
reg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

For me, this raises the age-old question of when it is/is not appropriate t=
o use IGPs for flooding information.

This is clearly not TE information - you just happen to be using this in co=
njunction with MPLS - but it is a generic capability. I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities. It a=
lso, as Acee has pointed out, results in flooding information to all nodes =
in the domain when only a few care about it.

[JD]  RTM support as defined in the draft would be used to provide extremel=
y accurate time synchronization in an MPLS network so I would suggest that =
all nodes in such a network would be using it and hence that it does belong=
 in the IGP.  As an aside, advertising it in the IGP facilitates incrementa=
l or partial deployment.  Your yesterday's email supports this:

"It would seem more appropriate to treat RTM information either as:

   o an extension to link attribute information already advertised by the I=
GPs (as has been suggested for OSPF) - which would suggest in IS-IS a sub-T=
LV of TLV 22(et al)

or


*        As an interface attribute independent of routing protocols which c=
ould be retrieved utilizing network management tools"

   Les

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 8:54 AM
To: Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg (gi=
nsberg)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node's RTM capabil=
ities and distribute them to the other nodes is undefined.  Further, one of=
 the ways by which an omniscient controller learns a node's capabilities is=
 by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander=
 Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@e=
citele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.c=
om>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com=
>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I'm sorry but I focused mainly on the OSPF protocol aspects then and didn't=
 question the use case. This question came up in the IS-IS WG discussions.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].







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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
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<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> John E D=
rake [mailto:jdrake@juniper.net]
<br>
<b>Sent:</b> Thursday, January 19, 2017 1:19 PM<br>
<b>To:</b> Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtei=
n; Greg Mirsky<br>
<b>Cc:</b> Robert Sparks; mpls@ietf.org; gen-art@ietf.org; draft-ietf-mpls-=
residence-time.all@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Les,<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">I understand and I have m=
ade the same argument in other contexts and with similar results (&#8220;&#=
8230; and your point is?&#8221;).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">[Les:] Nice to know=
 I am not completely alone.:-)<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">It would be good if=
 the authors/WG at least considered a non-IGP approach.<o:p></o:p></span></=
i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">However, if the IGP=
 approach is to be taken, the GENINFO definition currently in the draft is =
unacceptable for reasons I have previously given. So this
 should be reworked &#8211; probably to use a sub-TLV of TLV 22 et al.<o:p>=
</o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">The other alternati=
ve would be to define a GENINFO application that could support advertising =
many interface attributes &#8211; I don&#8217;t think anyone wants to
 go in that direction &#8211; certainly not me.<o:p></o:p></span></i></b></=
p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les<o:=
p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">However, as I indicated i=
n my previous email, RTM would be used as part of the network infrastructur=
e as a way to provide time synchronization between the nodes
 in the network, so I would consider it similar to the S-BFDs that Uma and =
you were discussing.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John<o:p></o:p></span></p=
>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> Les Gi=
nsberg (ginsberg) [<a href=3D"mailto:ginsberg@cisco.com">mailto:ginsberg@ci=
sco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 4:09 PM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com"=
>acee@cisco.com</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexand=
er.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
 Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail=
.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John &#8211;<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">The text you have excerpt=
ed below was trying to say two things:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">1)If you want to advertis=
e this in the IGPs the OSPF style proposal is much better from an implement=
ation standpoint than the IS-IS GENAPP proposal<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">2)There is a larger quest=
ion as to whether we should be using the IGPs for this at all<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Statement #1 should not b=
e interpreted to imply that I am advocating using the IGPs.
</span><span style=3D"font-size:11.0pt;font-family:Wingdings;color:#1F497D"=
>J</span><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">That said, we &#8220;ALWA=
YS&#8221; end up choosing using the IGPs to do this sort of thing &#8211; n=
ot because it is the &#8220;RIGHT&#8221; thing to do architecturally &#8211=
; but because it
 is so convenient.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">I am just asking for folk=
s to pause and think about this a bit more from an architectural perspectiv=
e.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> John E D=
rake [<a href=3D"mailto:jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 12:20 PM<br>
<b>To:</b> Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtei=
n; Greg Mirsky<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Les,<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Comments inline.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John<o:p></o:p></span></p=
>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> Les Gi=
nsberg (ginsberg) [<a href=3D"mailto:ginsberg@cisco.com">mailto:ginsberg@ci=
sco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 12:25 PM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com"=
>acee@cisco.com</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexand=
er.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
 Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail=
.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John &#8211;<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">For me, this raises the a=
ge-old question of when it is/is not appropriate to use IGPs for flooding i=
nformation.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">This is clearly not TE in=
formation &#8211; you just happen to be using this in conjunction with MPLS=
 &#8211; but it is a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">[JD]&nbsp; RTM supp=
ort as defined in the draft would be used to provide extremely accurate tim=
e synchronization in an MPLS network so I would suggest that
 all nodes in such a network would be using it and hence that it does belon=
g in the IGP.&nbsp; As an aside, advertising it in the IGP facilitates incr=
emental or partial deployment.&nbsp; Your yesterday&#8217;s email supports =
this:&nbsp;
<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">&#8220;It would see=
m more appropriate to treat RTM information either as:<o:p></o:p></span></i=
></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:=
#1F497D"><o:p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:=
#1F497D">&nbsp;&nbsp; o an extension to link attribute information already =
advertised by the IGPs (as has been suggested for OSPF) - which would
 suggest in IS-IS a sub-TLV of TLV 22(et al)<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:=
#1F497D"><o:p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">or<o:p></o:p></span=
></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:=
#1F497D"><o:p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:27.6pt;text-indent:-.25i=
n"><span style=3D"font-size:11.0pt;font-family:Symbol;color:#1F497D">&middo=
t;</span><span style=3D"font-size:7.0pt;color:#1F497D">&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;
</span><b><i><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot=
;,&quot;sans-serif&quot;;color:#1F497D">As an interface attribute independe=
nt of routing protocols which could be retrieved utilizing network manageme=
nt tools&#8221;<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> John E D=
rake [<a href=3D"mailto:jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Acee,<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Relying on an omniscient =
controller is a non-starter in general and in particular because the protoc=
ol by which it would learn each node&#8217;s RTM capabilities
 and distribute them to the other nodes is undefined.&nbsp; Further, one of=
 the ways by which an omniscient controller learns a node&#8217;s capabilit=
ies is by snooping the link/state database.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John<o:p></o:p></span></p=
>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vai=
nshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky =
&lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
 Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg=
@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi John,&nbsp;<o:p></o:p></=
span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">John E Drake &lt;<a href=3D"mailto:jdra=
ke@juniper.net">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@e=
citele.com">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a hr=
ef=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<a hr=
ef=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft=
-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draf=
t-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>=
&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay =
Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<=
br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Acee,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">We discussed all of this =
with you over a year ago and used your guidance in adding the indication of=
 RTM capability to OSPF.</span><span style=3D"color:black"><o:p></o:p></spa=
n></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I&#8217;m sorry but I focus=
ed mainly on the OSPF protocol aspects then and didn&#8217;t question the u=
se case. This question came up in the IS-IS WG discussions.&nbsp;<o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thanks,<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Acee<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,</sp=
an><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&qu=
ot;;color:black"> Acee Lindem (acee) [<a href=3D"mailto:acee@cisco.com">mai=
lto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Gin=
sberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.c=
om</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I guess what we were trying=
 to envision the use case and whether it makes sense for all the nodes in t=
he IGP routing domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Additionally, if it is need=
ed in the IGPs, should there also be a BGP-LS Link Attribute TLV proposed?&=
nbsp;</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thanks,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Acee&nbsp;</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">Alexander Vainshtein &lt;<a href=3D"mai=
lto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&=
gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Hi all,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">I concur with Greg: from =
my POV an interoperable solution should not depend on an omniscient NMS cli=
ent distributing information about capabilities of each
 node to each other node. </span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Regards,</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Sasha</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Office: &#43;972-39266302=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp; &#43;972-549266302</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&qu=
ot;;color:black"> Greg Mirsky [<a href=3D"mailto:gregimirsky@gmail.com">mai=
lto:gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Greg &#8211;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">I am having trouble understanding your =
response.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">The question we are raising is whether =
we should extend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Saying that the IGP functionality is op=
tional and/or wouldn&#8217;t always be advertised doesn&#8217;t really
 answer the question of whether we should or should not define the IGP exte=
nsions.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Could you respond more directly to this=
 point?</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
&quot;sans-serif&quot;;color:black">From:</span></b><span style=3D"font-siz=
e:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;;color:black"=
> Greg
 Mirsky [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">=
gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Greg,&nbsp;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Although it is a bit late, we&#8217;ve ha=
d some discussions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Thanks,</span><span style=3D"color:black"=
><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Acee &nbsp;</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces=
@ietf.org" target=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Gre=
g Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gre=
gimirsky@gmail.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">thank you for the most expedient review a=
nd comments. I'll make changes in Section 2 per your suggestion.</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert =
Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjspar=
ks@nostrum.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">The changes all look good.</span><span style=3D=
"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">I still think you should say something in the d=
ocument about what &quot;the time of packet arrival&quot; and &quot;transmi=
ssion&quot; means, and call out the point you made about being careful to
 not introduce apparent jitter by not making those measurements consistentl=
y. (The definitions you point to in your earlier mail from G.8013 don't rea=
lly help - they just say &quot;time of packet arrival&quot;. Again, the fir=
st and last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">Please look at the new first paragraph of secti=
on 2 - there's a mix of &quot;as case&quot; and &quot;in case&quot; that sh=
ould be made consistent. I suspect it would be easiest to simply say &quot;=
referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">RjS</span><span style=3D"color:black"><o:p></o:=
p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Sasha Vainshtein came with elegant idea t=
o address disconnection between discussion of one-step and
 two-step modes that you've pointed out. We've moved Section 7 as sub-secti=
on into Section 2 now. Attached are updated diff and the proposed new versi=
on -13.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mir=
sky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimir=
sky@gmail.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">once again, thank you for your thorough r=
eview and the most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert S=
parks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjspark=
s@nostrum.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: Eric Gray <eric.gray@ericsson.com>, Uma Chunduri <uma.chunduri@huawei.com>, John E Drake <jdrake@juniper.net>, "Acee Lindem (acee)" <acee@cisco.com>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Date: Thu, 19 Jan 2017 21:46:12 +0000
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Eric -

From: Eric Gray [mailto:eric.gray@ericsson.com]
Sent: Thursday, January 19, 2017 12:32 PM
To: Les Ginsberg (ginsberg); Uma Chunduri; John E Drake; Acee Lindem (acee)=
; Alexander Vainshtein; Greg Mirsky
Cc: mpls@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; gen-art@ietf.org; d=
raft-ietf-mpls-residence-time.all@ietf.org; Abhay Roy (akr); Robert Sparks
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Les,

                It's nice to have a good discussion about technical aspects=
 of a proposed standard, even late in the game.
[Les:] There is context you may not have.
"I" only became aware of this because - as one of the Designated Experts fo=
r IS-IS Registries - I was asked by IANA to approve the allocation of codep=
oints for the GENINFO proposal in the draft.
It would have been better had the IGP WGs been apprised of this draft and a=
sked for feedback earlier in the process - but AFAIK that did not happen. T=
his is a bit strange given that the draft authors include folks with long e=
xperience in MPLS/IGP interworking - but I am not trying to place blame. Fo=
r whatever reason this did not happen.

I do appreciate how late in the game this discussion is - but as I do not p=
ersonally follow MPLS drafts in general I was unaware of this draft until t=
he IANA request was sent.
Too late to fix this now - but something to be considered in the future whe=
n there are IGP extensions involved in MPLS Drafts.

                But I have some difficulty is seeing how this usage is "cle=
arly not TE information."
[Les:] The packet timing capability which you are asking IGPs to advertise =
is a generic capability which could be used for many purposes. The fact tha=
t you are applying it to MPLS LSPs does not make the capability an MPLS/TE =
related capability.
   Les

This information should allow the head-end of an LSP to select a path based=
 on desirable interface capabilities.  For the purposes of accurate time in=
formation, the best path may not also be the shortest path.  Is this not ex=
actly what traffic engineering is about?

As far as extending this argument to the ability to advertise additional li=
nk capabilities, I can easily imagine scenarios where that would make sense=
.  But nobody is suggesting that every LSR (or router for that matter) eith=
er must have this capability for every scenario, or that - having the capab=
ility - it would need to be turned on.

If there is an application or use-case out there that might require adverti=
sing every conceivable interface capability, then vendors will want to take=
 a look at the size of the opportunity represented by that and make a decis=
ion as to whether or not to support this.

--
Eric

From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Les Ginsberg (ginsbe=
rg)
Sent: Thursday, January 19, 2017 3:11 PM
To: Uma Chunduri <uma.chunduri@huawei.com<mailto:uma.chunduri@huawei.com>>;=
 John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Acee Lindem =
(acee) <acee@cisco.com<mailto:acee@cisco.com>>; Alexander Vainshtein <Alexa=
nder.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>; Greg=
 Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: mpls@ietf.org<mailto:mpls@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org=
>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; gen-art@ietf.org<mail=
to:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:dr=
aft-ietf-mpls-residence-time.all@ietf.org>; Abhay Roy (akr) <akr@cisco.com<=
mailto:akr@cisco.com>>; Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks=
@nostrum.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Uma -

I readily admit S-BFD descriptors are - strictly speaking - a violation of =
the "non-routing info" policy - this was publicly acknowledged at the time =
the drafts were written. The exception was justified on the basis that:

  o IGPs are BFD clients
  o The S-BFD discriminator information is unique and extremely modest in s=
ize

What we have here is a proposal to start advertising non-routing related in=
terface attribute information. There is nothing special or unique about RTM=
 - it is simply one of many interface attributes which are generic in natur=
e. Having agreed to advertise RTM in the IGPs, how would you then determine=
 what other interface attributes should/should not be advertised by the IGP=
s? Take a look at your favorite vendors box and see how many interface attr=
ibutes can be configured.
It is also concerning that - when using the IGPs - we flood information whi=
ch must be stored on every node even though the use case for it is limited =
to a much smaller subset.

I think we can and should be smarter in this regard - and given the extensi=
ve work being done to enhance manageability I would like to see us benefit =
from this.

The authors of draft-ietf-mpls-residence-time clearly had some thoughts in =
this regard - which is why they proposed to use RFC 6823 (GENAPP) in IS-IS =
to advertise the information -but the proposal in the draft is flawed in th=
is regard. If we were to head in the "application" direction I would propos=
e a much more generic "application" which is capable of advertising many in=
terface attributes. However this goes back to my original concern - whether=
 we want to use IGPs to flood interface attribute information unrelated to =
routing even if it is segregated under an application. Remember that RFC 68=
23 stipulates that a separate instance of the protocol (a la RFC 6822) be u=
sed for such cases.

   Les


From: Uma Chunduri [mailto:uma.chunduri@huawei.com]
Sent: Thursday, January 19, 2017 11:41 AM
To: Les Ginsberg (ginsberg); John E Drake; Acee Lindem (acee); Alexander Va=
inshtein; Greg Mirsky
Cc: Abhay Roy (akr); mpls@ietf.org<mailto:mpls@ietf.org>; isis-chairs@ietf.=
org<mailto:isis-chairs@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>=
; draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-reside=
nce-time.all@ietf.org>; Robert Sparks; ietf@ietf.org<mailto:ietf@ietf.org>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

I support advertising this in IGP.


>This is clearly not TE information -..
>I do not see the IGPs as the appropriate mechanism to flood generic interf=
ace capabilities

We have instances where both the above are not met and we flooded informati=
on.
https://tools.ietf.org/html/rfc7883 (Les, you co-authored the same!!)
https://tools.ietf.org/html/rfc7880

--
Uma C.

From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Les Ginsberg (ginsbe=
rg)
Sent: Thursday, January 19, 2017 9:25 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Acee Lind=
em (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Alexander Vainshtein <Al=
exander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>; G=
reg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>; mpls@ietf.org<ma=
ilto:mpls@ietf.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; gen=
-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@=
ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>; Robert Sparks=
 <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; ietf@ietf.org<mailto:=
ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

For me, this raises the age-old question of when it is/is not appropriate t=
o use IGPs for flooding information.

This is clearly not TE information - you just happen to be using this in co=
njunction with MPLS - but it is a generic capability. I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities. It a=
lso, as Acee has pointed out, results in flooding information to all nodes =
in the domain when only a few care about it.

   Les

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 8:54 AM
To: Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg (gi=
nsberg)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node's RTM capabil=
ities and distribute them to the other nodes is undefined.  Further, one of=
 the ways by which an omniscient controller learns a node's capabilities is=
 by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander=
 Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@e=
citele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.c=
om>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com=
>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I'm sorry but I focused mainly on the OSPF protocol aspects then and didn't=
 question the use case. This question came up in the IS-IS WG discussions.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].







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<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Eric -<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Eric Gra=
y [mailto:eric.gray@ericsson.com]
<br>
<b>Sent:</b> Thursday, January 19, 2017 12:32 PM<br>
<b>To:</b> Les Ginsberg (ginsberg); Uma Chunduri; John E Drake; Acee Lindem=
 (acee); Alexander Vainshtein; Greg Mirsky<br>
<b>Cc:</b> mpls@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; gen-art@ietf=
.org; draft-ietf-mpls-residence-time.all@ietf.org; Abhay Roy (akr); Robert =
Sparks<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">Les,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; It&#8217;s nice to have=
 a good discussion about technical aspects of a proposed standard, even lat=
e in the game.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">[Les:] There is con=
text you may not have.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">&#8220;I&#8221; onl=
y became aware of this because &#8211; as one of the Designated Experts for=
 IS-IS Registries - I was asked by IANA to approve the allocation of codepo=
ints
 for the GENINFO proposal in the draft.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">It would have been =
better had the IGP WGs been apprised of this draft and asked for feedback e=
arlier in the process &#8211; but AFAIK that did not happen. This
 is a bit strange given that the draft authors include folks with long expe=
rience in MPLS/IGP interworking &#8211; but I am not trying to place blame.=
 For whatever reason this did not happen.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">I do appreciate how=
 late in the game this discussion is &#8211; but as I do not personally fol=
low MPLS drafts in general I was unaware of this draft until the
 IANA request was sent.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Too late to fix thi=
s now &#8211; but something to be considered in the future when there are I=
GP extensions involved in MPLS Drafts.</span></i></b><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F4=
97D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; But I have some difficu=
lty is seeing how this usage is &#8220;clearly not TE information.&#8221;&n=
bsp;
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">[Les:] The packet t=
iming capability which you are asking IGPs to advertise is a generic capabi=
lity which could be used for many purposes. The fact that
 you are applying it to MPLS LSPs does not make the capability an MPLS/TE r=
elated capability.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p></o:p></span><=
/i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp;&nbsp;L=
es</span></i></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&=
quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;">This informa=
tion should allow the head-end of an LSP to select a path based on desirabl=
e interface capabilities.&nbsp; For the purposes of accurate time
 information, the best path may not also be the shortest path.&nbsp; Is thi=
s not exactly what traffic engineering is about?<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"><o:p>&nbsp;<=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;">As far as ex=
tending this argument to the ability to advertise additional link capabilit=
ies, I can easily imagine scenarios where that would make
 sense.&nbsp; But nobody is suggesting that every LSR (or router for that m=
atter) either must have this capability for every scenario, or that &#8211;=
 having the capability &#8211; it would need to be turned on.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"><o:p>&nbsp;<=
/o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;">If there is =
an application or use-case out there that might require advertising every c=
onceivable interface capability, then vendors will want to
 take a look at the size of the opportunity represented by that and make a =
decision as to whether or not to support this.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"><o:p>&nbsp;<=
/o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">--<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;">Eric<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> mpls [=
<a href=3D"mailto:mpls-bounces@ietf.org">mailto:mpls-bounces@ietf.org</a>]
<b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
<b>Sent:</b> Thursday, January 19, 2017 3:11 PM<br>
<b>To:</b> Uma Chunduri &lt;<a href=3D"mailto:uma.chunduri@huawei.com">uma.=
chunduri@huawei.com</a>&gt;; John E Drake &lt;<a href=3D"mailto:jdrake@juni=
per.net">jdrake@juniper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mail=
to:acee@cisco.com">acee@cisco.com</a>&gt;; Alexander Vainshtein
 &lt;<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshte=
in@ecitele.com</a>&gt;; Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail=
.com">gregimirsky@gmail.com</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"m=
ailto:ietf@ietf.org">
ietf@ietf.org</a>; <a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf=
.org</a>;
<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>; <a href=3D"mailto=
:draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; Abhay Roy (akr) &lt;<a hre=
f=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;; Robert Sparks &lt;<a href=
=3D"mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Uma &#8211;<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">I readily admit S-BFD des=
criptors are &#8211; strictly speaking - a violation of the &#8220;non-rout=
ing info&#8221; policy &#8211; this was publicly acknowledged at the time t=
he drafts
 were written. The exception was justified on the basis that:<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp; o IGPs are BFD cli=
ents<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp; o The S-BFD discri=
minator information is unique and extremely modest in size<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F=
497D">What we have here is a proposal to start advertising non-routing rela=
ted interface attribute information. There is nothing special
 or unique about RTM &#8211; it is simply one of many interface attributes =
which are generic in nature. Having agreed to advertise RTM in the IGPs, ho=
w would you then determine what other interface attributes should/should no=
t be advertised by the IGPs? Take a look
 at your favorite vendors box and see how many interface attributes can be =
configured.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">It is also concerning tha=
t &#8211; when using the IGPs &#8211; we flood information which must be st=
ored on every node even though the use case for it is limited to a much
 smaller subset.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">I think we can and should=
 be smarter in this regard &#8211; and given the extensive work being done =
to enhance manageability I would like to see us benefit from this.<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">The authors of draft-ietf=
-mpls-residence-time clearly had some thoughts in this regard &#8211; which=
 is why they proposed to use RFC 6823 (GENAPP) in IS-IS to advertise
 the information &#8211;but the proposal in the draft is flawed in this reg=
ard. If we were to head in the &#8220;application&#8221; direction I would =
propose a much more generic &#8220;application&#8221; which is capable of a=
dvertising many interface attributes. However this goes back to
 my original concern &#8211; whether we want to use IGPs to flood interface=
 attribute information unrelated to routing even if it is segregated under =
an application. Remember that RFC 6823 stipulates that a separate instance =
of the protocol (a la RFC 6822) be used
 for such cases.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Uma Chun=
duri [<a href=3D"mailto:uma.chunduri@huawei.com">mailto:uma.chunduri@huawei=
.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:41 AM<br>
<b>To:</b> Les Ginsberg (ginsberg); John E Drake; Acee Lindem (acee); Alexa=
nder Vainshtein; Greg Mirsky<br>
<b>Cc:</b> Abhay Roy (akr); <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org<=
/a>; <a href=3D"mailto:isis-chairs@ietf.org">
isis-chairs@ietf.org</a>; <a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.=
org</a>;
<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-m=
pls-residence-time.all@ietf.org</a>; Robert Sparks;
<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a><br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497=
D">I support advertising this in IGP.</span></a><span style=3D"font-size:11=
.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&gt;This is clearly not T=
E information &#8211;..<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&gt;I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">We have instances where b=
oth the above are not met and we flooded information.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><a href=3D"https://tools.ietf.org/html/rfc7883"><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-seri=
f&quot;">https://tools.ietf.org/html/rfc7883</span></a><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1=
F497D">
 (Les, you co-authored the same!!)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><a href=3D"https://tools.ietf.org/html/rfc7880"><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-seri=
f&quot;">https://tools.ietf.org/html/rfc7880</span></a><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1=
F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">--</span><span style=3D"f=
ont-size:11.0pt;font-family:&quot;Freestyle Script&quot;;color:#1F497D"><o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Uma C.</span><span style=
=3D"font-size:11.0pt;font-family:&quot;Brush Script MT&quot;;color:#1F497D"=
><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> mpls [=
<a href=3D"mailto:mpls-bounces@ietf.org">mailto:mpls-bounces@ietf.org</a>]
<b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
<b>Sent:</b> Thursday, January 19, 2017 9:25 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com"=
>acee@cisco.com</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexand=
er.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
 Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail=
.com</a>&gt;<br>
<b>Cc:</b> Abhay Roy (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.c=
om</a>&gt;; <a href=3D"mailto:mpls@ietf.org">
mpls@ietf.org</a>; <a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf=
.org</a>;
<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>; <a href=3D"mailto=
:draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; Robert Sparks &lt;<a href=
=3D"mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John &#8211;<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">For me, this raises the a=
ge-old question of when it is/is not appropriate to use IGPs for flooding i=
nformation.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">This is clearly not TE in=
formation &#8211; you just happen to be using this in conjunction with MPLS=
 &#8211; but it is a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> John E D=
rake [<a href=3D"mailto:jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Acee,<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Relying on an omniscient =
controller is a non-starter in general and in particular because the protoc=
ol by which it would learn each node&#8217;s RTM capabilities
 and distribute them to the other nodes is undefined.&nbsp; Further, one of=
 the ways by which an omniscient controller learns a node&#8217;s capabilit=
ies is by snooping the link/state database.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John<o:p></o:p></span></p=
>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vai=
nshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky =
&lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
 Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg=
@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi John,&nbsp;<o:p></o:p></=
span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">John E Drake &lt;<a href=3D"mailto:jdra=
ke@juniper.net">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@e=
citele.com">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a hr=
ef=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<a hr=
ef=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft=
-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draf=
t-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>=
&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay =
Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<=
br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Acee,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">We discussed all of this =
with you over a year ago and used your guidance in adding the indication of=
 RTM capability to OSPF.</span><span style=3D"color:black"><o:p></o:p></spa=
n></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I&#8217;m sorry but I focus=
ed mainly on the OSPF protocol aspects then and didn&#8217;t question the u=
se case. This question came up in the IS-IS WG discussions.&nbsp;<o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thanks,<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Acee<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,</sp=
an><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&qu=
ot;;color:black"> Acee Lindem (acee) [<a href=3D"mailto:acee@cisco.com">mai=
lto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Gin=
sberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.c=
om</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I guess what we were trying=
 to envision the use case and whether it makes sense for all the nodes in t=
he IGP routing domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Additionally, if it is need=
ed in the IGPs, should there also be a BGP-LS Link Attribute TLV proposed?&=
nbsp;</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thanks,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Acee&nbsp;</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">Alexander Vainshtein &lt;<a href=3D"mai=
lto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&=
gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Hi all,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">I concur with Greg: from =
my POV an interoperable solution should not depend on an omniscient NMS cli=
ent distributing information about capabilities of each
 node to each other node. </span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Regards,</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Sasha</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Office: &#43;972-39266302=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp; &#43;972-549266302</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&qu=
ot;;color:black"> Greg Mirsky [<a href=3D"mailto:gregimirsky@gmail.com">mai=
lto:gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Greg &#8211;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">I am having trouble understanding your =
response.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">The question we are raising is whether =
we should extend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Saying that the IGP functionality is op=
tional and/or wouldn&#8217;t always be advertised doesn&#8217;t really
 answer the question of whether we should or should not define the IGP exte=
nsions.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Could you respond more directly to this=
 point?</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
&quot;sans-serif&quot;;color:black">From:</span></b><span style=3D"font-siz=
e:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;;color:black"=
> Greg
 Mirsky [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">=
gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Greg,&nbsp;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Although it is a bit late, we&#8217;ve ha=
d some discussions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Thanks,</span><span style=3D"color:black"=
><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Acee &nbsp;</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces=
@ietf.org" target=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Gre=
g Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gre=
gimirsky@gmail.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">thank you for the most expedient review a=
nd comments. I'll make changes in Section 2 per your suggestion.</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert =
Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjspar=
ks@nostrum.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">The changes all look good.</span><span style=3D=
"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">I still think you should say something in the d=
ocument about what &quot;the time of packet arrival&quot; and &quot;transmi=
ssion&quot; means, and call out the point you made about being careful to
 not introduce apparent jitter by not making those measurements consistentl=
y. (The definitions you point to in your earlier mail from G.8013 don't rea=
lly help - they just say &quot;time of packet arrival&quot;. Again, the fir=
st and last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">Please look at the new first paragraph of secti=
on 2 - there's a mix of &quot;as case&quot; and &quot;in case&quot; that sh=
ould be made consistent. I suspect it would be easiest to simply say &quot;=
referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">RjS</span><span style=3D"color:black"><o:p></o:=
p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Sasha Vainshtein came with elegant idea t=
o address disconnection between discussion of one-step and
 two-step modes that you've pointed out. We've moved Section 7 as sub-secti=
on into Section 2 now. Attached are updated diff and the proposed new versi=
on -13.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mir=
sky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimir=
sky@gmail.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">once again, thank you for your thorough r=
eview and the most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert S=
parks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjspark=
s@nostrum.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</body>
</html>

--_000_6278f2b3ce884507ad08d92c5b1e17edXCHALN001ciscocom_--


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From: John E Drake <jdrake@juniper.net>
To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, "Acee Lindem (acee)" <acee@cisco.com>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Cc: "Abhay Roy \(akr\)" <akr@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, Robert Sparks <rjsparks@nostrum.com>, "ietf@ietf.org" <ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Content-Type: text/plain; charset="us-ascii"
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Les,

Shall we go with a sub-TLV of TLV 22 and promise to never ever to do this a=
gain?

Btw, I am extremely sorry that we didn't engage with the IS-IS community an=
d I don't know why we didn't.  As I said in an earlier email, we worked pre=
tty extensively with Acee on the OSPF aspects and with Lou Berger on the RS=
VP-TE aspects and received a lot of useful feedback from both of them.

Yours Irrespectively,

John

From: Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com]
Sent: Thursday, January 19, 2017 4:55 PM
To: John E Drake <jdrake@juniper.net>; Acee Lindem (acee) <acee@cisco.com>;=
 Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>; Greg Mirsky <greg=
imirsky@gmail.com>
Cc: Robert Sparks <rjsparks@nostrum.com>; mpls@ietf.org; gen-art@ietf.org; =
draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org; isis-chairs@iet=
f.org; Abhay Roy (akr) <akr@cisco.com>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 1:19 PM
To: Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtein; Greg=
 Mirsky
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Les,

I understand and I have made the same argument in other contexts and with s=
imilar results ("... and your point is?").
[Les:] Nice to know I am not completely alone.:-)

It would be good if the authors/WG at least considered a non-IGP approach.
However, if the IGP approach is to be taken, the GENINFO definition current=
ly in the draft is unacceptable for reasons I have previously given. So thi=
s should be reworked - probably to use a sub-TLV of TLV 22 et al.
The other alternative would be to define a GENINFO application that could s=
upport advertising many interface attributes - I don't think anyone wants t=
o go in that direction - certainly not me.

   Les


However, as I indicated in my previous email, RTM would be used as part of =
the network infrastructure as a way to provide time synchronization between=
 the nodes in the network, so I would consider it similar to the S-BFDs tha=
t Uma and you were discussing.

Yours Irrespectively,

John

From: Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com]
Sent: Thursday, January 19, 2017 4:09 PM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Acee Lind=
em (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Alexander Vainshtein <Al=
exander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>; G=
reg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

The text you have excerpted below was trying to say two things:

1)If you want to advertise this in the IGPs the OSPF style proposal is much=
 better from an implementation standpoint than the IS-IS GENAPP proposal

2)There is a larger question as to whether we should be using the IGPs for =
this at all

Statement #1 should not be interpreted to imply that I am advocating using =
the IGPs. :)

That said, we "ALWAYS" end up choosing using the IGPs to do this sort of th=
ing - not because it is the "RIGHT" thing to do architecturally - but becau=
se it is so convenient.

I am just asking for folks to pause and think about this a bit more from an=
 architectural perspective.

   Les


From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 12:20 PM
To: Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtein; Greg=
 Mirsky
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Les,

Comments inline.

Yours Irrespectively,

John

From: Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com]
Sent: Thursday, January 19, 2017 12:25 PM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Acee Lind=
em (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Alexander Vainshtein <Al=
exander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>; G=
reg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

For me, this raises the age-old question of when it is/is not appropriate t=
o use IGPs for flooding information.

This is clearly not TE information - you just happen to be using this in co=
njunction with MPLS - but it is a generic capability. I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities. It a=
lso, as Acee has pointed out, results in flooding information to all nodes =
in the domain when only a few care about it.

[JD]  RTM support as defined in the draft would be used to provide extremel=
y accurate time synchronization in an MPLS network so I would suggest that =
all nodes in such a network would be using it and hence that it does belong=
 in the IGP.  As an aside, advertising it in the IGP facilitates incrementa=
l or partial deployment.  Your yesterday's email supports this:

"It would seem more appropriate to treat RTM information either as:

   o an extension to link attribute information already advertised by the I=
GPs (as has been suggested for OSPF) - which would suggest in IS-IS a sub-T=
LV of TLV 22(et al)

or


*        As an interface attribute independent of routing protocols which c=
ould be retrieved utilizing network management tools"

   Les

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 8:54 AM
To: Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg (gi=
nsberg)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node's RTM capabil=
ities and distribute them to the other nodes is undefined.  Further, one of=
 the ways by which an omniscient controller learns a node's capabilities is=
 by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander=
 Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@e=
citele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.c=
om>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com=
>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I'm sorry but I focused mainly on the OSPF protocol aspects then and didn't=
 question the use case. This question came up in the IS-IS WG discussions.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].







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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Les,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Shall we go with a sub-TLV of TLV 22 =
and promise to never ever to do this again?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Btw, I am extremely sorry that we did=
n&#8217;t engage with the IS-IS community and I don&#8217;t know why we did=
n&#8217;t.&nbsp; As I said in an earlier email, we worked pretty extensivel=
y
 with Acee on the OSPF aspects and with Lou Berger on the RSVP-TE aspects a=
nd received a lot of useful feedback from both of them.<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Les Ginsberg (ginsberg) [mailt=
o:ginsberg@cisco.com]
<br>
<b>Sent:</b> Thursday, January 19, 2017 4:55 PM<br>
<b>To:</b> John E Drake &lt;jdrake@juniper.net&gt;; Acee Lindem (acee) &lt;=
acee@cisco.com&gt;; Alexander Vainshtein &lt;Alexander.Vainshtein@ecitele.c=
om&gt;; Greg Mirsky &lt;gregimirsky@gmail.com&gt;<br>
<b>Cc:</b> Robert Sparks &lt;rjsparks@nostrum.com&gt;; mpls@ietf.org; gen-a=
rt@ietf.org; draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org; is=
is-chairs@ietf.org; Abhay Roy (akr) &lt;akr@cisco.com&gt;<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John -<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> John E Drake [<a href=3D"mailto:=
jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 1:19 PM<br>
<b>To:</b> Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtei=
n; Greg Mirsky<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Les,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">I understand and I have made the same=
 argument in other contexts and with similar results (&#8220;&#8230; and yo=
ur point is?&#8221;).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">[Les:] Nice to know I am not co=
mpletely alone.:-)<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">It would be good if the authors=
/WG at least considered a non-IGP approach.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">However, if the IGP approach is=
 to be taken, the GENINFO definition currently in the draft is unacceptable=
 for reasons I have previously given. So this
 should be reworked &#8211; probably to use a sub-TLV of TLV 22 et al.<o:p>=
</o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">The other alternative would be =
to define a GENINFO application that could support advertising many interfa=
ce attributes &#8211; I don&#8217;t think anyone wants to
 go in that direction &#8211; certainly not me.<o:p></o:p></span></i></b></=
p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:p></sp=
an></i></b></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">However, as I indicated in my previou=
s email, RTM would be used as part of the network infrastructure as a way t=
o provide time synchronization between the nodes
 in the network, so I would consider it similar to the S-BFDs that Uma and =
you were discussing.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Les Ginsberg (ginsberg) [<a hr=
ef=3D"mailto:ginsberg@cisco.com">mailto:ginsberg@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 4:09 PM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com"=
>acee@cisco.com</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexand=
er.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
 Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail=
.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John &#8211;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">The text you have excerpted below was=
 trying to say two things:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">1)If you want to advertise this in th=
e IGPs the OSPF style proposal is much better from an implementation standp=
oint than the IS-IS GENAPP proposal<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">2)There is a larger question as to wh=
ether we should be using the IGPs for this at all<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Statement #1 should not be interprete=
d to imply that I am advocating using the IGPs.
</span><span style=3D"font-size:11.0pt;font-family:Wingdings;color:#1F497D"=
>J</span><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">That said, we &#8220;ALWAYS&#8221; en=
d up choosing using the IGPs to do this sort of thing &#8211; not because i=
t is the &#8220;RIGHT&#8221; thing to do architecturally &#8211; but becaus=
e it is
 so convenient.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">I am just asking for folks to pause a=
nd think about this a bit more from an architectural perspective.<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> John E Drake [<a href=3D"mailto:=
jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 12:20 PM<br>
<b>To:</b> Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtei=
n; Greg Mirsky<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Les,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Comments inline.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Les Ginsberg (ginsberg) [<a hr=
ef=3D"mailto:ginsberg@cisco.com">mailto:ginsberg@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 12:25 PM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com"=
>acee@cisco.com</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexand=
er.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
 Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail=
.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John &#8211;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">For me, this raises the age-old quest=
ion of when it is/is not appropriate to use IGPs for flooding information.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">This is clearly not TE information &#=
8211; you just happen to be using this in conjunction with MPLS &#8211; but=
 it is a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">[JD]&nbsp; RTM support as defin=
ed in the draft would be used to provide extremely accurate time synchroniz=
ation in an MPLS network so I would suggest that all
 nodes in such a network would be using it and hence that it does belong in=
 the IGP.&nbsp; As an aside, advertising it in the IGP facilitates incremen=
tal or partial deployment.&nbsp; Your yesterday&#8217;s email supports this=
:&nbsp;
<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">&#8220;It would seem more appro=
priate to treat RTM information either as:<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:=
p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">&nb=
sp;&nbsp; o an extension to link attribute information already advertised b=
y the IGPs (as has been suggested for OSPF) - which would
 suggest in IS-IS a sub-TLV of TLV 22(et al)<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:=
p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">or<o:p></o:p></span></i></b></p=
>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:=
p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:27.6pt;text-indent:-.25i=
n"><span style=3D"font-size:11.0pt;font-family:Symbol;color:#1F497D">&middo=
t;</span><span style=3D"font-size:7.0pt;color:#1F497D">&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;
</span><b><i><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot=
;,sans-serif;color:#1F497D">As an interface attribute independent of routin=
g protocols which could be retrieved utilizing network management tools&#82=
21;<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> John E Drake [<a href=3D"mailto:=
jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Relying on an omniscient controller i=
s a non-starter in general and in particular because the protocol by which =
it would learn each node&#8217;s RTM capabilities and
 distribute them to the other nodes is undefined.&nbsp; Further, one of the=
 ways by which an omniscient controller learns a node&#8217;s capabilities =
is by snooping the link/state database.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Acee Lindem (acee) [<a href=3D=
"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vai=
nshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky =
&lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
 Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg=
@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi John,&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">John E Drake &lt;<a href=3D"mailto:jdrake@juniper.n=
et">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@e=
citele.com">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a hr=
ef=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<a hr=
ef=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft=
-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draf=
t-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>=
&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay =
Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<=
br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We discussed all of this with you ove=
r a year ago and used your guidance in adding the indication of RTM capabil=
ity to OSPF.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I&#8217;m sorry but I focused mainly on=
 the OSPF protocol aspects then and didn&#8217;t question the use case. Thi=
s question came up in the IS-IS WG discussions.&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Gin=
sberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.c=
om</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I guess what we were trying to envision=
 the use case and whether it makes sense for all the nodes in the IGP routi=
ng domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Additionally, if it is needed in the IG=
Ps, should there also be a BGP-LS Link Attribute TLV proposed?&nbsp;</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee&nbsp;</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Alexander Vainshtein &lt;<a href=3D"mailto:Alexande=
r.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Hi all,</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">I concur with Greg: from my POV an in=
teroperable solution should not depend on an omniscient NMS client distribu=
ting information about capabilities of each node
 to each other node. </span><span style=3D"color:black"><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Regards,</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Sasha</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Office: &#43;972-39266302</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &=
#43;972-549266302</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Greg M=
irsky [<a href=3D"mailto:gregimirsky@gmail.com">mailto:gregimirsky@gmail.co=
m</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Greg &#8211;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">I am having trouble understanding your response.</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The question we are raising is whether we should ex=
tend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Saying that the IGP functionality is optional and/o=
r wouldn&#8217;t always be advertised doesn&#8217;t really answer
 the question of whether we should or should not define the IGP extensions.=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Could you respond more directly to this point?</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black">From:</span></b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black"> Greg Mirsky
 [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimi=
rsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Greg,&nbsp;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Although it is a bit late, we&#8217;ve had some discu=
ssions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Thanks,</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Acee &nbsp;</span><span style=3D"color:black"><o:p></=
o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces@ietf.org" t=
arget=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Greg Mirsky &lt=
;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gma=
il.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">thank you for the most expedient review and comments.=
 I'll make changes in Section 2 per your suggestion.</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks &lt;<=
a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.c=
om</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">The changes all look good.</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">I still think you should say something in the document abou=
t what &quot;the time of packet arrival&quot; and &quot;transmission&quot; =
means, and call out the point you made about being careful to not
 introduce apparent jitter by not making those measurements consistently. (=
The definitions you point to in your earlier mail from G.8013 don't really =
help - they just say &quot;time of packet arrival&quot;. Again, the first a=
nd last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Please look at the new first paragraph of section 2 - there=
's a mix of &quot;as case&quot; and &quot;in case&quot; that should be made=
 consistent. I suspect it would be easiest to simply say &quot;referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">RjS</span><span style=3D"color:black"><o:p></o:p></span></p=
>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</span><span s=
tyle=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Sasha Vainshtein came with elegant idea to address di=
sconnection between discussion of one-step and two-step
 modes that you've pointed out. We've moved Section 7 as sub-section into S=
ection 2 now. Attached are updated diff and the proposed new version -13.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">once again, thank you for your thorough review and th=
e most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks &lt;<a=
 href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>

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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Thu, 19 Jan 2017 14:22:32 -0800
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Cc: "Les Ginsberg \(ginsberg\)" <ginsberg@cisco.com>, "ietf@ietf.org" <ietf@ietf.org>, "mpls@ietf.org" <mpls@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, "Abhay Roy \(akr\)" <akr@cisco.com>, Robert Sparks <rjsparks@nostrum.com>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Hi Les,
thank you for your thoughtful consideration and the most helpful
suggestion. I'll prepare update accordingly and share with you and the
IS-IS community.
And, as John expressed, sorry that missed to reach to IS-IS experts in the
first place.

Regards, Greg

On Thu, Jan 19, 2017 at 2:04 PM, John E Drake <jdrake@juniper.net> wrote:

> Les,
>
>
>
> Shall we go with a sub-TLV of TLV 22 and promise to never ever to do this
> again?
>
>
>
> Btw, I am extremely sorry that we didn=E2=80=99t engage with the IS-IS co=
mmunity
> and I don=E2=80=99t know why we didn=E2=80=99t.  As I said in an earlier =
email, we worked
> pretty extensively with Acee on the OSPF aspects and with Lou Berger on t=
he
> RSVP-TE aspects and received a lot of useful feedback from both of them.
>
>
>
> Yours Irrespectively,
>
>
>
> John
>
>
>
> *From:* Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com]
> *Sent:* Thursday, January 19, 2017 4:55 PM
>
> *To:* John E Drake <jdrake@juniper.net>; Acee Lindem (acee) <
> acee@cisco.com>; Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>;
> Greg Mirsky <gregimirsky@gmail.com>
> *Cc:* Robert Sparks <rjsparks@nostrum.com>; mpls@ietf.org;
> gen-art@ietf.org; draft-ietf-mpls-residence-time.all@ietf.org;
> ietf@ietf.org; isis-chairs@ietf.org; Abhay Roy (akr) <akr@cisco.com>
> *Subject:* RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>
>
> John -
>
>
>
> *From:* John E Drake [mailto:jdrake@juniper.net <jdrake@juniper.net>]
> *Sent:* Thursday, January 19, 2017 1:19 PM
> *To:* Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtein;
> Greg Mirsky
> *Cc:* Robert Sparks; mpls@ietf.org; gen-art@ietf.org;
> draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org;
> isis-chairs@ietf.org; Abhay Roy (akr)
> *Subject:* RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>
>
> Les,
>
>
>
> I understand and I have made the same argument in other contexts and with
> similar results (=E2=80=9C=E2=80=A6 and your point is?=E2=80=9D).
>
> *[Les:] Nice to know I am not completely alone.:-)*
>
>
>
> *It would be good if the authors/WG at least considered a non-IGP
> approach.*
>
> *However, if the IGP approach is to be taken, the GENINFO definition
> currently in the draft is unacceptable for reasons I have previously give=
n.
> So this should be reworked =E2=80=93 probably to use a sub-TLV of TLV 22 =
et al.*
>
> *The other alternative would be to define a GENINFO application that coul=
d
> support advertising many interface attributes =E2=80=93 I don=E2=80=99t t=
hink anyone wants
> to go in that direction =E2=80=93 certainly not me.*
>
>
>
> *   Les*
>
>
>
>
>
> However, as I indicated in my previous email, RTM would be used as part o=
f
> the network infrastructure as a way to provide time synchronization betwe=
en
> the nodes in the network, so I would consider it similar to the S-BFDs th=
at
> Uma and you were discussing.
>
>
>
> Yours Irrespectively,
>
>
>
> John
>
>
>
> *From:* Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com
> <ginsberg@cisco.com>]
> *Sent:* Thursday, January 19, 2017 4:09 PM
> *To:* John E Drake <jdrake@juniper.net>; Acee Lindem (acee) <
> acee@cisco.com>; Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>;
> Greg Mirsky <gregimirsky@gmail.com>
> *Cc:* Robert Sparks <rjsparks@nostrum.com>; mpls@ietf.org;
> gen-art@ietf.org; draft-ietf-mpls-residence-time.all@ietf.org;
> ietf@ietf.org; isis-chairs@ietf.org; Abhay Roy (akr) <akr@cisco.com>
> *Subject:* RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>
>
> John =E2=80=93
>
>
>
> The text you have excerpted below was trying to say two things:
>
>
>
> 1)If you want to advertise this in the IGPs the OSPF style proposal is
> much better from an implementation standpoint than the IS-IS GENAPP propo=
sal
>
>
>
> 2)There is a larger question as to whether we should be using the IGPs fo=
r
> this at all
>
>
>
> Statement #1 should not be interpreted to imply that I am advocating usin=
g
> the IGPs. J
>
>
>
> That said, we =E2=80=9CALWAYS=E2=80=9D end up choosing using the IGPs to =
do this sort of
> thing =E2=80=93 not because it is the =E2=80=9CRIGHT=E2=80=9D thing to do=
 architecturally =E2=80=93 but
> because it is so convenient.
>
>
>
> I am just asking for folks to pause and think about this a bit more from
> an architectural perspective.
>
>
>
>    Les
>
>
>
>
>
> *From:* John E Drake [mailto:jdrake@juniper.net <jdrake@juniper.net>]
> *Sent:* Thursday, January 19, 2017 12:20 PM
> *To:* Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtein;
> Greg Mirsky
> *Cc:* Robert Sparks; mpls@ietf.org; gen-art@ietf.org;
> draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org;
> isis-chairs@ietf.org; Abhay Roy (akr)
> *Subject:* RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>
>
> Les,
>
>
>
> Comments inline.
>
>
>
> Yours Irrespectively,
>
>
>
> John
>
>
>
> *From:* Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com
> <ginsberg@cisco.com>]
> *Sent:* Thursday, January 19, 2017 12:25 PM
> *To:* John E Drake <jdrake@juniper.net>; Acee Lindem (acee) <
> acee@cisco.com>; Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>;
> Greg Mirsky <gregimirsky@gmail.com>
> *Cc:* Robert Sparks <rjsparks@nostrum.com>; mpls@ietf.org;
> gen-art@ietf.org; draft-ietf-mpls-residence-time.all@ietf.org;
> ietf@ietf.org; isis-chairs@ietf.org; Abhay Roy (akr) <akr@cisco.com>
> *Subject:* RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>
>
> John =E2=80=93
>
>
>
> For me, this raises the age-old question of when it is/is not appropriate
> to use IGPs for flooding information.
>
>
>
> This is clearly not TE information =E2=80=93 you just happen to be using =
this in
> conjunction with MPLS =E2=80=93 but it is a generic capability. I do not =
see the
> IGPs as the appropriate mechanism to flood generic interface capabilities=
.
> It also, as Acee has pointed out, results in flooding information to all
> nodes in the domain when only a few care about it.
>
>
>
> *[JD]  RTM support as defined in the draft would be used to provide
> extremely accurate time synchronization in an MPLS network so I would
> suggest that all nodes in such a network would be using it and hence that
> it does belong in the IGP.  As an aside, advertising it in the IGP
> facilitates incremental or partial deployment.  Your yesterday=E2=80=99s =
email
> supports this:  *
>
>
>
> *=E2=80=9CIt would seem more appropriate to treat RTM information either =
as:*
>
>
>
> *   o an extension to link attribute information already advertised by th=
e
> IGPs (as has been suggested for OSPF) - which would suggest in IS-IS a
> sub-TLV of TLV 22(et al)*
>
>
>
> *or*
>
>
>
> =C2=B7        *As an interface attribute independent of routing protocols
> which could be retrieved utilizing network management tools=E2=80=9D*
>
>
>
>    Les
>
>
>
> *From:* John E Drake [mailto:jdrake@juniper.net <jdrake@juniper.net>]
> *Sent:* Thursday, January 19, 2017 8:54 AM
> *To:* Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg
> (ginsberg)
> *Cc:* Robert Sparks; mpls@ietf.org; gen-art@ietf.org;
> draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org;
> isis-chairs@ietf.org; Abhay Roy (akr)
> *Subject:* RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>
>
> Acee,
>
>
>
> Relying on an omniscient controller is a non-starter in general and in
> particular because the protocol by which it would learn each node=E2=80=
=99s RTM
> capabilities and distribute them to the other nodes is undefined.  Furthe=
r,
> one of the ways by which an omniscient controller learns a node=E2=80=99s
> capabilities is by snooping the link/state database.
>
>
>
> Yours Irrespectively,
>
>
>
> John
>
>
>
> *From:* Acee Lindem (acee) [mailto:acee@cisco.com <acee@cisco.com>]
> *Sent:* Thursday, January 19, 2017 11:47 AM
> *To:* John E Drake <jdrake@juniper.net>; Alexander Vainshtein <
> Alexander.Vainshtein@ecitele.com>; Greg Mirsky <gregimirsky@gmail.com>;
> Les Ginsberg (ginsberg) <ginsberg@cisco.com>
> *Cc:* Robert Sparks <rjsparks@nostrum.com>; mpls@ietf.org;
> gen-art@ietf.org; draft-ietf-mpls-residence-time.all@ietf.org;
> ietf@ietf.org; isis-chairs@ietf.org; Abhay Roy (akr) <akr@cisco.com>
> *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>
>
> Hi John,
>
>
>
> *From: *John E Drake <jdrake@juniper.net>
> *Date: *Thursday, January 19, 2017 at 10:43 AM
> *To: *Acee Lindem <acee@cisco.com>, Alexander Vainshtein <
> Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>,
> "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
> *Cc: *Robert Sparks <rjsparks@nostrum.com>, "mpls@ietf.org" <mpls@ietf.or=
g>,
> "gen-art@ietf.org" <gen-art@ietf.org>, "draft-ietf-mpls-residence-
> time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, "
> ietf@ietf.org" <ietf@ietf.org>, "isis-chairs@ietf.org" <
> isis-chairs@ietf.org>, "Abhay Roy (akr)" <akr@cisco.com>
> *Subject: *RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>
>
> Acee,
>
>
>
> We discussed all of this with you over a year ago and used your guidance
> in adding the indication of RTM capability to OSPF.
>
>
>
> I=E2=80=99m sorry but I focused mainly on the OSPF protocol aspects then =
and
> didn=E2=80=99t question the use case. This question came up in the IS-IS =
WG
> discussions.
>
>
>
> Thanks,
>
> Acee
>
>
>
>
>
> Yours Irrespectively,
>
>
>
> John
>
>
>
> *From:* Acee Lindem (acee) [mailto:acee@cisco.com <acee@cisco.com>]
> *Sent:* Thursday, January 19, 2017 11:38 AM
> *To:* Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>; Greg
> Mirsky <gregimirsky@gmail.com>; Les Ginsberg (ginsberg) <
> ginsberg@cisco.com>
> *Cc:* Robert Sparks <rjsparks@nostrum.com>; mpls@ietf.org;
> gen-art@ietf.org; draft-ietf-mpls-residence-time.all@ietf.org;
> ietf@ietf.org; isis-chairs@ietf.org; Abhay Roy (akr) <akr@cisco.com>
> *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>
>
> I guess what we were trying to envision the use case and whether it makes
> sense for all the nodes in the IGP routing domain to have this informatio=
n.
> Would the LSP ingress LSR only need to if the egress LSR supports RTM and
> it is best effort recording for transit LSRs in the path?
>
>
>
> Additionally, if it is needed in the IGPs, should there also be a BGP-LS
> Link Attribute TLV proposed?
>
>
>
> Thanks,
>
> Acee
>
>
>
> *From: *Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
> *Date: *Thursday, January 19, 2017 at 10:15 AM
> *To: *Greg Mirsky <gregimirsky@gmail.com>, "Les Ginsberg (ginsberg)" <
> ginsberg@cisco.com>
> *Cc: *Acee Lindem <acee@cisco.com>, Robert Sparks <rjsparks@nostrum.com>,
> "mpls@ietf.org" <mpls@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "
> draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-
> time.all@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "isis-chairs@ietf.or=
g"
> <isis-chairs@ietf.org>, "Abhay Roy (akr)" <akr@cisco.com>
> *Subject: *RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>
>
> Hi all,
>
> I concur with Greg: from my POV an interoperable solution should not
> depend on an omniscient NMS client distributing information about
> capabilities of each node to each other node.
>
>
>
>
>
> Regards,
>
> Sasha
>
>
>
> Office: +972-39266302 <+972%203-926-6302>
>
> Cell:      +972-549266302 <+972%2054-926-6302>
>
> Email:   Alexander.Vainshtein@ecitele.com
>
>
>
> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com <gregimirsky@gmail.com>=
]
>
> *Sent:* Thursday, January 19, 2017 6:01 PM
> *To:* Les Ginsberg (ginsberg) <ginsberg@cisco.com>
> *Cc:* Acee Lindem (acee) <acee@cisco.com>; Robert Sparks <
> rjsparks@nostrum.com>; mpls@ietf.org; gen-art@ietf.org;
> draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org;
> isis-chairs@ietf.org; Abhay Roy (akr) <akr@cisco.com>
> *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>
>
> Hi Les,
>
> I believe that IGP extensions to advertise RTM capability are required.
>
>
>
> Regards,
>
> Greg
>
>
>
> On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <
> ginsberg@cisco.com> wrote:
>
> Greg =E2=80=93
>
>
>
> I am having trouble understanding your response.
>
> The question we are raising is whether we should extend the IGPs to
> support advertising RTM capability =E2=80=93 an alternative being to retr=
ieve the
> capability via network management.
>
>
>
> Saying that the IGP functionality is optional and/or wouldn=E2=80=99t alw=
ays be
> advertised doesn=E2=80=99t really answer the question of whether we shoul=
d or
> should not define the IGP extensions.
>
>
>
> Could you respond more directly to this point?
>
>
>
>    Les
>
>
>
>
>
> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com]
> *Sent:* Thursday, January 19, 2017 7:44 AM
> *To:* Acee Lindem (acee)
> *Cc:* Robert Sparks; mpls@ietf.org; gen-art@ietf.org;
> draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org; Les Ginsberg
> (ginsberg); isis-chairs@ietf.org; Abhay Roy (akr)
>
>
> *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>
>
> Hi Acee,
>
> the draft defines optional functionality. If an operator has no use
> neither for PTP's Transparent Clock, nor RTM itself as performance metric=
,
> then RTM sub-TLV would not be included and thus it would not be flooded. =
Of
> course, it be right to reflect RTM capability through YANG data model, th=
us
> allowing SDN scenario you've described.
>
>
>
> Regards,
>
> Greg
>
>
>
> On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com>
> wrote:
>
> Hi Greg,
>
>
>
> Although it is a bit late, we=E2=80=99ve had some discussions amongst the=
 IS-IS
> and OSPF chairs and are wondering whether the interface capability belong=
s
> in the IGPs. This will be flooded throughout the entire routing domain =
=E2=80=93 is
> it really needed on every node or will it the RTM testing be initiated fr=
om
> an omniscient NMS client that would know the capabilities of each node or
> easily query them using YANG?
>
>
>
> Thanks,
>
> Acee
>
>
>
> *From: *mpls <mpls-bounces@ietf.org> on behalf of Greg Mirsky <
> gregimirsky@gmail.com>
> *Date: *Wednesday, January 18, 2017 at 1:25 PM
> *To: *Robert Sparks <rjsparks@nostrum.com>
> *Cc: *"mpls@ietf.org" <mpls@ietf.org>, "gen-art@ietf.org" <
> gen-art@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <
> draft-ietf-mpls-residence-time.all@ietf.org>, "ietf@ietf.org" <
> ietf@ietf.org>
> *Subject: *Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>
>
> Hi Robert,
>
> thank you for the most expedient review and comments. I'll make changes i=
n
> Section 2 per your suggestion.
>
>
>
> Regards,
>
> Greg
>
>
>
> On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com>
> wrote:
>
> The changes all look good.
>
> I still think you should say something in the document about what "the
> time of packet arrival" and "transmission" means, and call out the point
> you made about being careful to not introduce apparent jitter by not maki=
ng
> those measurements consistently. (The definitions you point to in your
> earlier mail from G.8013 don't really help - they just say "time of packe=
t
> arrival". Again, the first and last bit are likely to be several
> nanoseconds apart so I think it matters. Perhaps you're saying it doesn't
> matter as long as each node is consistent (there will be error in the
> residence time measurement, but it will be constant at each node, so the
> sum of errors will be constant, and the clocks will be ok?)
>
> Please look at the new first paragraph of section 2 - there's a mix of "a=
s
> case" and "in case" that should be made consistent. I suspect it would be
> easiest to simply say "referred to as using a one-step clock" and "referr=
ed
> to as using a two-step clock" or similar.
>
> RjS
>
>
>
> On 1/18/17 12:03 PM, Greg Mirsky wrote:
>
> Hi Robert,
>
> Sasha Vainshtein came with elegant idea to address disconnection between
> discussion of one-step and two-step modes that you've pointed out. We've
> moved Section 7 as sub-section into Section 2 now. Attached are updated
> diff and the proposed new version -13.
>
>
>
> Regards,
>
> Greg
>
>
>
> On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com>
> wrote:
>
> Hi Robert,
>
> once again, thank you for your thorough review and the most detailed
> comments. I've prepared updated version and would greatly appreciate if y=
ou
> review the changes and let us know whether your comments been addressed.
> Attached are diff and the new version.
>
>
>
> Regards,
>
> Greg
>
>
>
> On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com>
> wrote:
>
> Reviewer: Robert Sparks
> Review result: Ready with Nits
>
> I am the assigned Gen-ART reviewer for this draft. The General Area
> Review Team (Gen-ART) reviews all IETF documents being processed
> by the IESG for the IETF Chair.  Please treat these comments just
> like any other last call comments.
>
> For more information, please see the FAQ at
> <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
>
> Document: draft-ietf-mpls-residence-time-12
> Reviewer: Robert Sparks
> Review Date: 2017-01-10
> IETF LC End Date: 2017-01-17
> IESG Telechat date: 2017-02-02
>
> Summary: Ready (with nits) for publication as a Proposed Standard
>
> I have two primary comments. I expect both are rooted in the authors
> and working group knowing what the document means instead of seeing
> what
> it says or doesn't say:
>
> 1) The document is loose with its use of 'packet', and where TTLs
> appear when
> they are discussed. It might be helpful to rephrase the text that
> speaks
> of RTM packets in terms of RTM messages that are encoded as G-ACh
> messages and
> not refer to packets unless you mean the whole encapsulated packet
> with MPLS
> header, ACH, and G-ACh message.
>
> 2) Since this new mechanic speaks in terms of fractional nanoseconds,
> some
> discussion of what trigger-point you intend people to use for taking
> the
> precise time of a packet's arrival or departure seems warranted. (The
> first and
> last bit of the whole encapsulated packet above are going to appear at
> the
> physical layer many nanoseconds apart at OC192 speeds if I've done the
> math
> right). It may be obvious to the folks discussing this, but it's not
> obvious
> from the document.  If it's _not_ obvious and variation in technique
> is
> expected, then some discussion about issues that might arise from
> different
> implementation choices would be welcome.
>
> The rest of these are editorial nits:
>
> It would help to pull an overview description of the difference
> between
> one-step and two-step much earlier in the document. I suggest in the
> overview
> in section 2. Otherwise, the reader really has to jump forward and
> read section
> 7 before section 3's 5th bullet makes any sense.
>
> In section 3, "IANA will be asked" should be made active. Say "This
> document
> asks IANA to" and point to the IANA consideration section. Apply
> similar
> treatment to the other places where you talk about future IANA
> actions.
>
> There are several places where there are missing words (typically
> articles or
> prepositions). You're less likely to end up with misinterpretations
> during the
> RFC Editor phase if you provide them before the document gets that far
> in the
> process. The spots I found most disruptive were these (this is not
> intended to
> be exhaustive):
>
>   Section 3: "set 1 according" -> "set to 1 according"
>   Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
>   Section 4.2: "Detailed discussion of ... modes in Section 7."
>                         -> "Detailed discussion of ... modes appears
> in Section 7."
>   Section 10: "most of" -> "most of all"
>
> In Setion 3.1 at "identity of the source port", please point into the
> document
> that defines this identity and its representation. I suspect this is a
> pointer
> into a specific section in IEEE.1588.2008].
>
>
>
>
>
>
>
>
>
>
>
>
>
>

--94eb2c03307438a2bf054679f831
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Les,<div>thank you for your thoughtful consideration an=
d the most helpful suggestion. I&#39;ll prepare update accordingly and shar=
e with you and the IS-IS community.</div><div>And, as John expressed, sorry=
 that missed to reach to IS-IS experts in the first place.</div><div><br></=
div><div>Regards, Greg</div></div><div class=3D"gmail_extra"><br><div class=
=3D"gmail_quote">On Thu, Jan 19, 2017 at 2:04 PM, John E Drake <span dir=3D=
"ltr">&lt;<a href=3D"mailto:jdrake@juniper.net" target=3D"_blank">jdrake@ju=
niper.net</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_987988381662175074WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Les,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Shall we go with a sub-TLV of TLV 22 =
and promise to never ever to do this again?<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Btw, I am extremely sorry that we did=
n=E2=80=99t engage with the IS-IS community and I don=E2=80=99t know why we=
 didn=E2=80=99t.=C2=A0 As I said in an earlier email, we worked pretty exte=
nsively
 with Acee on the OSPF aspects and with Lou Berger on the RSVP-TE aspects a=
nd received a lot of useful feedback from both of them.<u></u><u></u></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Yours Irrespectively,<u></u><u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">John<u></u><u></u></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Les Ginsberg (ginsberg) [mailt=
o:<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@cisco.co=
m</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 4:55 PM</span></p><div><div class=
=3D"h5"><br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net" target=3D=
"_blank">jdrake@juniper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mail=
to:acee@cisco.com" target=3D"_blank">acee@cisco.com</a>&gt;; Alexander Vain=
shtein &lt;<a href=3D"mailto:Alexander.Vainshtein@ecitele.com" target=3D"_b=
lank">Alexander.Vainshtein@ecitele.<wbr>com</a>&gt;; Greg Mirsky &lt;<a hre=
f=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com<=
/a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;; <a href=3D"mailto:mpls@ietf.org" =
target=3D"_blank">mpls@ietf.org</a>; <a href=3D"mailto:gen-art@ietf.org" ta=
rget=3D"_blank">gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-res=
idence-time.all@ietf.org" target=3D"_blank">draft-ietf-mpls-residence-<wbr>=
time.all@ietf.org</a>; <a href=3D"mailto:ietf@ietf.org" target=3D"_blank">i=
etf@ietf.org</a>; <a href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank"=
>isis-chairs@ietf.org</a>; Abhay Roy (akr) &lt;<a href=3D"mailto:akr@cisco.=
com" target=3D"_blank">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-<wbr>time-12=
<u></u><u></u></div></div><p></p>
</div>
</div><div><div class=3D"h5">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">John -<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> John E Drake [<a href=3D"mailto:=
jdrake@juniper.net" target=3D"_blank">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 1:19 PM<br>
<b>To:</b> Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtei=
n; Greg Mirsky<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>; <a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-<wbr>time.all@ietf.org</a>; <a href=3D"mailto:iet=
f@ietf.org" target=3D"_blank">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">isis-chairs@ietf.=
org</a>; Abhay Roy (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-<wbr>time-12=
<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Les,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">I understand and I have made the same=
 argument in other contexts and with similar results (=E2=80=9C=E2=80=A6 an=
d your point is?=E2=80=9D).<u></u><u></u></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">[Les:] Nice to know I am not co=
mpletely alone.:-)<u></u><u></u></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></i>=
</b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">It would be good if the authors=
/WG at least considered a non-IGP approach.<u></u><u></u></span></i></b></p=
>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">However, if the IGP approach is=
 to be taken, the GENINFO definition currently in the draft is unacceptable=
 for reasons I have previously given. So this
 should be reworked =E2=80=93 probably to use a sub-TLV of TLV 22 et al.<u>=
</u><u></u></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">The other alternative would be =
to define a GENINFO application that could support advertising many interfa=
ce attributes =E2=80=93 I don=E2=80=99t think anyone wants to
 go in that direction =E2=80=93 certainly not me.<u></u><u></u></span></i><=
/b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></i>=
</b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 Les<u></u><u></u><=
/span></i></b></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">However, as I indicated in my previou=
s email, RTM would be used as part of the network infrastructure as a way t=
o provide time synchronization between the nodes
 in the network, so I would consider it similar to the S-BFDs that Uma and =
you were discussing.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Yours Irrespectively,<u></u><u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">John<u></u><u></u></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Les Ginsberg (ginsberg) [<a hr=
ef=3D"mailto:ginsberg@cisco.com" target=3D"_blank">mailto:ginsberg@cisco.co=
m</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 4:09 PM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net" target=3D=
"_blank">jdrake@juniper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mail=
to:acee@cisco.com" target=3D"_blank">acee@cisco.com</a>&gt;; Alexander Vain=
shtein &lt;<a href=3D"mailto:Alexander.Vainshtein@ecitele.com" target=3D"_b=
lank">Alexander.Vainshtein@ecitele.<wbr>com</a>&gt;;
 Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank"=
>gregimirsky@gmail.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ietf.org</a>; <a hr=
ef=3D"mailto:gen-art@ietf.org" target=3D"_blank">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-<wbr>time.all@ietf.org</a>; <a href=3D"mailto:iet=
f@ietf.org" target=3D"_blank">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">isis-chairs@ietf.=
org</a>; Abhay Roy (akr) &lt;<a href=3D"mailto:akr@cisco.com" target=3D"_bl=
ank">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-<wbr>time-12=
<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">John =E2=80=93<u></u><u></u></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">The text you have excerpted below was=
 trying to say two things:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">1)If you want to advertise this in th=
e IGPs the OSPF style proposal is much better from an implementation standp=
oint than the IS-IS GENAPP proposal<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">2)There is a larger question as to wh=
ether we should be using the IGPs for this at all<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Statement #1 should not be interprete=
d to imply that I am advocating using the IGPs.
</span><span style=3D"font-size:11.0pt;font-family:Wingdings;color:#1f497d"=
>J</span><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1f497d"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">That said, we =E2=80=9CALWAYS=E2=80=
=9D end up choosing using the IGPs to do this sort of thing =E2=80=93 not b=
ecause it is the =E2=80=9CRIGHT=E2=80=9D thing to do architecturally =E2=80=
=93 but because it is
 so convenient.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">I am just asking for folks to pause a=
nd think about this a bit more from an architectural perspective.<u></u><u>=
</u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 Les<u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> John E Drake [<a href=3D"mailto:=
jdrake@juniper.net" target=3D"_blank">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 12:20 PM<br>
<b>To:</b> Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtei=
n; Greg Mirsky<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>; <a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-<wbr>time.all@ietf.org</a>; <a href=3D"mailto:iet=
f@ietf.org" target=3D"_blank">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">isis-chairs@ietf.=
org</a>; Abhay Roy (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-<wbr>time-12=
<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Les,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Comments inline.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Yours Irrespectively,<u></u><u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">John<u></u><u></u></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Les Ginsberg (ginsberg) [<a hr=
ef=3D"mailto:ginsberg@cisco.com" target=3D"_blank">mailto:ginsberg@cisco.co=
m</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 12:25 PM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net" target=3D=
"_blank">jdrake@juniper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mail=
to:acee@cisco.com" target=3D"_blank">acee@cisco.com</a>&gt;; Alexander Vain=
shtein &lt;<a href=3D"mailto:Alexander.Vainshtein@ecitele.com" target=3D"_b=
lank">Alexander.Vainshtein@ecitele.<wbr>com</a>&gt;;
 Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank"=
>gregimirsky@gmail.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ietf.org</a>; <a hr=
ef=3D"mailto:gen-art@ietf.org" target=3D"_blank">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-<wbr>time.all@ietf.org</a>; <a href=3D"mailto:iet=
f@ietf.org" target=3D"_blank">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">isis-chairs@ietf.=
org</a>; Abhay Roy (akr) &lt;<a href=3D"mailto:akr@cisco.com" target=3D"_bl=
ank">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-<wbr>time-12=
<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">John =E2=80=93<u></u><u></u></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">For me, this raises the age-old quest=
ion of when it is/is not appropriate to use IGPs for flooding information.<=
u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">This is clearly not TE information =
=E2=80=93 you just happen to be using this in conjunction with MPLS =E2=80=
=93 but it is a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></i>=
</b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">[JD]=C2=A0 RTM support as defin=
ed in the draft would be used to provide extremely accurate time synchroniz=
ation in an MPLS network so I would suggest that all
 nodes in such a network would be using it and hence that it does belong in=
 the IGP.=C2=A0 As an aside, advertising it in the IGP facilitates incremen=
tal or partial deployment.=C2=A0 Your yesterday=E2=80=99s email supports th=
is:=C2=A0
<u></u><u></u></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></i>=
</b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">=E2=80=9CIt would seem more app=
ropriate to treat RTM information either as:<u></u><u></u></span></i></b></=
p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u>=
</u>=C2=A0<u></u></span></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d">=C2=
=A0=C2=A0 o an extension to link attribute information already advertised b=
y the IGPs (as has been suggested for OSPF) - which would
 suggest in IS-IS a sub-TLV of TLV 22(et al)<u></u><u></u></span></i></b></=
p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u>=
</u>=C2=A0<u></u></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">or<u></u><u></u></span></i></b>=
</p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u>=
</u>=C2=A0<u></u></span></i></b></p>
<p class=3D"m_987988381662175074MsoListParagraph" style=3D"margin-left:27.6=
pt"><span style=3D"font-size:11.0pt;font-family:Symbol;color:#1f497d">=C2=
=B7</span><span style=3D"font-size:7.0pt;color:#1f497d">=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0
</span><b><i><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot=
;,sans-serif;color:#1f497d">As an interface attribute independent of routin=
g protocols which could be retrieved utilizing network management tools=E2=
=80=9D<u></u><u></u></span></i></b></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 Les<u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> John E Drake [<a href=3D"mailto:=
jdrake@juniper.net" target=3D"_blank">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>; <a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-<wbr>time.all@ietf.org</a>; <a href=3D"mailto:iet=
f@ietf.org" target=3D"_blank">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">isis-chairs@ietf.=
org</a>; Abhay Roy (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-<wbr>time-12=
<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Acee,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Relying on an omniscient controller i=
s a non-starter in general and in particular because the protocol by which =
it would learn each node=E2=80=99s RTM capabilities and
 distribute them to the other nodes is undefined.=C2=A0 Further, one of the=
 ways by which an omniscient controller learns a node=E2=80=99s capabilitie=
s is by snooping the link/state database.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Yours Irrespectively,<u></u><u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">John<u></u><u></u></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Acee Lindem (acee) [<a href=3D=
"mailto:acee@cisco.com" target=3D"_blank">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net" target=3D=
"_blank">jdrake@juniper.net</a>&gt;; Alexander Vainshtein &lt;<a href=3D"ma=
ilto:Alexander.Vainshtein@ecitele.com" target=3D"_blank">Alexander.Vainshte=
in@ecitele.<wbr>com</a>&gt;; Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@=
gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>&gt;;
 Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" target=
=3D"_blank">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ietf.org</a>; <a hr=
ef=3D"mailto:gen-art@ietf.org" target=3D"_blank">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-<wbr>time.all@ietf.org</a>; <a href=3D"mailto:iet=
f@ietf.org" target=3D"_blank">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">isis-chairs@ietf.=
org</a>; Abhay Roy (akr) &lt;<a href=3D"mailto:akr@cisco.com" target=3D"_bl=
ank">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-<wbr>time-12=
<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi John,=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><u></u>=C2=A0<u></u></span></p>
</div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">John E Drake &lt;<a href=3D"mailto:jdrake@juniper.n=
et" target=3D"_blank">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_bla=
nk">acee@cisco.com</a>&gt;, Alexander Vainshtein &lt;<a href=3D"mailto:Alex=
ander.Vainshtein@ecitele.com" target=3D"_blank">Alexander.Vainshtein@ecitel=
e.<wbr>com</a>&gt;, Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com=
" target=3D"_blank">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om" target=3D"_blank">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf=
.org" target=3D"_blank">mpls@ietf.org</a>&quot; &lt;<a href=3D"mailto:mpls@=
ietf.org" target=3D"_blank">mpls@ietf.org</a>&gt;, &quot;<a href=3D"mailto:=
gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-<wbr>time.all@ietf.org</a>&quot; &lt=
;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">draft-ietf-mpls-residence-<wbr>time.all@ietf.org</a>&gt;, &quot;<a h=
ref=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;, &quot;<a href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">isis-ch=
airs@ietf.org</a>&quot; &lt;<a href=3D"mailto:isis-chairs@ietf.org" target=
=3D"_blank">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quot; &lt;<=
a href=3D"mailto:akr@cisco.com" target=3D"_blank">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-<wbr>time-12=
<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><u></u>=C2=A0<u></u></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #b5c4df 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_987988381662175074MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE=
">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Acee,</span><span style=3D"color:blac=
k"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">We discussed all of this with you ove=
r a year ago and used your guidance in adding the indication of RTM capabil=
ity to OSPF.</span><span style=3D"color:black"><u></u><u></u></span></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I=E2=80=99m sorry but I focused mainly =
on the OSPF protocol aspects then and didn=E2=80=99t question the use case.=
 This question came up in the IS-IS WG discussions.=C2=A0<u></u><u></u></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><u></u>=C2=A0<u></u></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #b5c4df 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_987988381662175074MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE=
">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Yours Irrespectively,</span><span sty=
le=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">John</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com" target=3D"_blank">mailto:ac=
ee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com" target=3D"_blank">Alexander.Vainshtein@ecitele.<wbr>com</a>&gt=
;; Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blan=
k">gregimirsky@gmail.com</a>&gt;; Les Ginsberg (ginsberg) &lt;<a href=3D"ma=
ilto:ginsberg@cisco.com" target=3D"_blank">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ietf.org</a>; <a hr=
ef=3D"mailto:gen-art@ietf.org" target=3D"_blank">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-<wbr>time.all@ietf.org</a>; <a href=3D"mailto:iet=
f@ietf.org" target=3D"_blank">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">isis-chairs@ietf.=
org</a>; Abhay Roy (akr) &lt;<a href=3D"mailto:akr@cisco.com" target=3D"_bl=
ank">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-<wbr>time-12=
</span><span style=3D"color:black"><u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">=C2=A0<u></u><u></u></sp=
an></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I guess what we were trying to envision=
 the use case and whether it makes sense for all the nodes in the IGP routi=
ng domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? =C2=A0</span><span style=3D=
"color:black"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Additionally, if it is needed in the IG=
Ps, should there also be a BGP-LS Link Attribute TLV proposed?=C2=A0</span>=
<span style=3D"color:black"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,</span><span style=3D"color:blac=
k"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee=C2=A0</span><span style=3D"color:b=
lack"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Alexander Vainshtein &lt;<a href=3D"mailto:Alexande=
r.Vainshtein@ecitele.com" target=3D"_blank">Alexander.Vainshtein@ecitele.<w=
br>com</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=
=3D"_blank">gregimirsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&qu=
ot; &lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@ci=
sco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_bla=
nk">acee@cisco.com</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@no=
strum.com" target=3D"_blank">rjsparks@nostrum.com</a>&gt;, &quot;<a href=3D=
"mailto:mpls@ietf.org" target=3D"_blank">mpls@ietf.org</a>&quot; &lt;<a hre=
f=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.o=
rg</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-=
art@ietf.org</a>&gt;, &quot;<a href=3D"mailto:draft-ietf-mpls-residence-tim=
e.all@ietf.org" target=3D"_blank">draft-ietf-mpls-residence-<wbr>time.all@i=
etf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org" target=3D"_blank">draft-ietf-mpls-residence-<wbr>time.all@ietf.or=
g</a>&gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>=
&quot; &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org=
</a>&gt;, &quot;<a href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">i=
sis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:isis-chairs@ietf.org" t=
arget=3D"_blank">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quot; =
&lt;<a href=3D"mailto:akr@cisco.com" target=3D"_blank">akr@cisco.com</a>&gt=
;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-<wbr>time-12=
</span><span style=3D"color:black"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #b5c4df 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_987988381662175074MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE=
">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546a">Hi all,</span><span style=3D"color:bl=
ack"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546a">I concur with Greg: from my POV an in=
teroperable solution should not depend on an omniscient NMS client distribu=
ting information about capabilities of each node
 to each other node. </span><span style=3D"color:black"><u></u><u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546a">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546a">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546a">Regards,</span><span style=3D"color:b=
lack"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546a">Sasha</span><span style=3D"color:blac=
k"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546a">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546a">Office: <a href=3D"tel:+972%203-926-6=
302" value=3D"+97239266302" target=3D"_blank">+972-39266302</a></span><span=
 style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546a">Cell:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 <=
a href=3D"tel:+972%2054-926-6302" value=3D"+972549266302" target=3D"_blank"=
>+972-549266302</a></span><span style=3D"color:black"><u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546a">Email:=C2=A0=C2=A0
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com" target=3D"_blank">Alexa=
nder.Vainshtein@ecitele.<wbr>com</a></span><span style=3D"color:black"><u><=
/u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546a">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Greg M=
irsky [<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">mailto:gr=
egimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
" target=3D"_blank">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=
=3D"_blank">acee@cisco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjs=
parks@nostrum.com" target=3D"_blank">rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ietf.org</a>; <a hr=
ef=3D"mailto:gen-art@ietf.org" target=3D"_blank">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-<wbr>time.all@ietf.org</a>; <a href=3D"mailto:iet=
f@ietf.org" target=3D"_blank">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">isis-chairs@ietf.=
org</a>; Abhay Roy (akr) &lt;<a href=3D"mailto:akr@cisco.com" target=3D"_bl=
ank">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-<wbr>time-12=
</span><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">=C2=A0<u></u><u></u></sp=
an></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<u></u><u></u></s=
pan></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">=C2=A0<u></u><u></u></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<u></u><u></u></=
span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<u></u><u></u></span=
></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">=C2=A0<u></u><u></u></sp=
an></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<u></u><u></u></span></p=
>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Greg =E2=80=93</span><span style=3D"c=
olor:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">I am having trouble understanding you=
r response.</span><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">The question we are raising is whethe=
r we should extend the IGPs to support advertising RTM capability
 =E2=80=93 an alternative being to retrieve the capability via network mana=
gement.</span><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Saying that the IGP functionality is =
optional and/or wouldn=E2=80=99t always be advertised doesn=E2=80=99t reall=
y answer
 the question of whether we should or should not define the IGP extensions.=
</span><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Could you respond more directly to th=
is point?</span><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 Les</span><span style=3D=
"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black"> Greg Mir=
sky
 [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimi=
rsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-<wbr>time.all@ietf.org</a>; <a href=3D"mailto:iet=
f@ietf.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><u></u><u></u></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-<wbr>time-12=
<u></u><u></u></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">=C2=A0<u></u><u></u></sp=
an></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Acee,<u></u><u></u></=
span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">the draft defines option=
al functionality. If an operator has no use neither for PTP&#39;s Transpare=
nt Clock, nor RTM itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you&#39;ve described.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">=C2=A0<u></u><u></u></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<u></u><u></u></=
span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<u></u><u></u></span=
></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">=C2=A0<u></u><u></u></sp=
an></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Wed, Jan 18, 2017 at =
2:51 PM, Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D=
"_blank">acee@cisco.com</a>&gt; wrote:<u></u><u></u></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi Greg,=C2=A0</span><span style=3D"col=
or:black"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Although it is a bit late, we=E2=80=99v=
e had some discussions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain =E2=80=93 is it really needed on ever=
y node or will it the RTM testing be initiated from an omniscient NMS clien=
t that would know the capabilities of each
 node or easily query them using YANG?=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,</span><span style=3D"color:blac=
k"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee =C2=A0</span><span style=3D"color:=
black"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces@ietf.org" t=
arget=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Greg Mirsky &lt=
;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gma=
il.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-<wbr>time.all@ietf.org</a>&quot; &lt=
;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">draft-ietf-mpls-residence-<wbr>time.all@ietf.org</a>&gt;, &quot;<a h=
ref=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-<wbr>time-12=
</span><span style=3D"color:black"><u></u><u></u></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #b5c4df 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_987988381662175074m_3295676440435625155m_-4440083661=
747761180MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">thank you for the most expedient review=
 and comments. I&#39;ll make changes in Section 2 per your suggestion.</spa=
n><span style=3D"color:black"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Regards,</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Greg</span><span style=3D"color:black">=
<u></u><u></u></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Rober=
t Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsp=
arks@nostrum.com</a>&gt;
 wrote:</span><span style=3D"color:black"><u></u><u></u></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">The changes all look good.</span><span style=3D"color:black=
"><u></u><u></u></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">I still think you should say something in the document abou=
t what &quot;the time of packet arrival&quot; and &quot;transmission&quot; =
means, and call out the point you made about being careful to not
 introduce apparent jitter by not making those measurements consistently. (=
The definitions you point to in your earlier mail from G.8013 don&#39;t rea=
lly help - they just say &quot;time of packet arrival&quot;. Again, the fir=
st and last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you&#39;re saying it doesn&#39;t matt=
er as long as each node is consistent (there will be error in the residence=
 time measurement, but it will be constant at each node, so the sum of erro=
rs will be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><u></u><u></u></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Please look at the new first paragraph of section 2 - there=
&#39;s a mix of &quot;as case&quot; and &quot;in case&quot; that should be =
made consistent. I suspect it would be easiest to simply say &quot;referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><u></u><u></u>=
</span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">RjS</span><span style=3D"color:black"><u></u><u></u></span>=
</p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:=
</span><span style=3D"color:black"><u></u><u></u></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Sasha Vainshtein came with elegant idea=
 to address disconnection between discussion of one-step and two-step
 modes that you&#39;ve pointed out. We&#39;ve moved Section 7 as sub-sectio=
n into Section 2 now. Attached are updated diff and the proposed new versio=
n -13.</span><span style=3D"color:black"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Regards,</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Greg</span><span style=3D"color:black">=
<u></u><u></u></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg M=
irsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregim=
irsky@gmail.com</a>&gt;
 wrote:</span><span style=3D"color:black"><u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">once again, thank you for your thorough=
 review and the most detailed comments. I&#39;ve prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Regards,</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Greg</span><span style=3D"color:black">=
<u></u><u></u></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert=
 Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjspa=
rks@nostrum.com</a>&gt;
 wrote:</span><span style=3D"color:black"><u></u><u></u></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Reviewer=
: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.=C2=A0 Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/<wbr>gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-<wbr>time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn&#39;t say:<br>
<br>
1) The document is loose with its use of &#39;packet&#39;, and where TTLs<b=
r>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet&#39;s arrival or departure seems warranted. (The<b=
r>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I&#39;ve done the<=
br>
math<br>
right). It may be obvious to the folks discussing this, but it&#39;s not<br=
>
obvious<br>
from the document.=C2=A0 If it&#39;s _not_ obvious and variation in techniq=
ue<br>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3&#39;s 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You&#39;re less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
=C2=A0 Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
=C2=A0 Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
=C2=A0 Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
=C2=A0 Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].</span><span style=3D"color:blac=
k"><u></u><u></u></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">=C2=A0<u></u><u></u></sp=
an></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">=C2=A0<u></u><u></u></sp=
an></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</div>
</div></div></div>
</div>
</div>

</blockquote></div><br></div>

--94eb2c03307438a2bf054679f831--


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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: John E Drake <jdrake@juniper.net>, "Acee Lindem (acee)" <acee@cisco.com>,  Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Date: Thu, 19 Jan 2017 22:43:34 +0000
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Cc: "Abhay Roy \(akr\)" <akr@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, Robert Sparks <rjsparks@nostrum.com>, "ietf@ietf.org" <ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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John -

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 2:04 PM
To: Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtein; Greg=
 Mirsky
Cc: Robert Sparks; mpls@ietf.org; gen-art@ietf.org; draft-ietf-mpls-residen=
ce-time.all@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Les,

Shall we go with a sub-TLV of TLV 22
[Les:] If that is the direction the WG wants to go I am OK with it - but I =
do think this proposal should be sent to the IS-IS WG for comment as well.

and promise to never ever to do this again?

[Les:] LOL...sure!

   Les

Btw, I am extremely sorry that we didn't engage with the IS-IS community an=
d I don't know why we didn't.  As I said in an earlier email, we worked pre=
tty extensively with Acee on the OSPF aspects and with Lou Berger on the RS=
VP-TE aspects and received a lot of useful feedback from both of them.

Yours Irrespectively,

John

From: Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com]
Sent: Thursday, January 19, 2017 4:55 PM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Acee Lind=
em (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Alexander Vainshtein <Al=
exander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>; G=
reg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 1:19 PM
To: Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtein; Greg=
 Mirsky
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Les,

I understand and I have made the same argument in other contexts and with s=
imilar results ("... and your point is?").
[Les:] Nice to know I am not completely alone.:-)

It would be good if the authors/WG at least considered a non-IGP approach.
However, if the IGP approach is to be taken, the GENINFO definition current=
ly in the draft is unacceptable for reasons I have previously given. So thi=
s should be reworked - probably to use a sub-TLV of TLV 22 et al.
The other alternative would be to define a GENINFO application that could s=
upport advertising many interface attributes - I don't think anyone wants t=
o go in that direction - certainly not me.

   Les


However, as I indicated in my previous email, RTM would be used as part of =
the network infrastructure as a way to provide time synchronization between=
 the nodes in the network, so I would consider it similar to the S-BFDs tha=
t Uma and you were discussing.

Yours Irrespectively,

John

From: Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com]
Sent: Thursday, January 19, 2017 4:09 PM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Acee Lind=
em (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Alexander Vainshtein <Al=
exander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>; G=
reg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

The text you have excerpted below was trying to say two things:

1)If you want to advertise this in the IGPs the OSPF style proposal is much=
 better from an implementation standpoint than the IS-IS GENAPP proposal

2)There is a larger question as to whether we should be using the IGPs for =
this at all

Statement #1 should not be interpreted to imply that I am advocating using =
the IGPs. :)

That said, we "ALWAYS" end up choosing using the IGPs to do this sort of th=
ing - not because it is the "RIGHT" thing to do architecturally - but becau=
se it is so convenient.

I am just asking for folks to pause and think about this a bit more from an=
 architectural perspective.

   Les


From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 12:20 PM
To: Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtein; Greg=
 Mirsky
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Les,

Comments inline.

Yours Irrespectively,

John

From: Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com]
Sent: Thursday, January 19, 2017 12:25 PM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Acee Lind=
em (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Alexander Vainshtein <Al=
exander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>; G=
reg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

For me, this raises the age-old question of when it is/is not appropriate t=
o use IGPs for flooding information.

This is clearly not TE information - you just happen to be using this in co=
njunction with MPLS - but it is a generic capability. I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities. It a=
lso, as Acee has pointed out, results in flooding information to all nodes =
in the domain when only a few care about it.

[JD]  RTM support as defined in the draft would be used to provide extremel=
y accurate time synchronization in an MPLS network so I would suggest that =
all nodes in such a network would be using it and hence that it does belong=
 in the IGP.  As an aside, advertising it in the IGP facilitates incrementa=
l or partial deployment.  Your yesterday's email supports this:

"It would seem more appropriate to treat RTM information either as:

   o an extension to link attribute information already advertised by the I=
GPs (as has been suggested for OSPF) - which would suggest in IS-IS a sub-T=
LV of TLV 22(et al)

or


*        As an interface attribute independent of routing protocols which c=
ould be retrieved utilizing network management tools"

   Les

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 8:54 AM
To: Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg (gi=
nsberg)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node's RTM capabil=
ities and distribute them to the other nodes is undefined.  Further, one of=
 the ways by which an omniscient controller learns a node's capabilities is=
 by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander=
 Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@e=
citele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.c=
om>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com=
>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I'm sorry but I focused mainly on the OSPF protocol aspects then and didn't=
 question the use case. This question came up in the IS-IS WG discussions.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].







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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John -<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> John E D=
rake [mailto:jdrake@juniper.net]
<br>
<b>Sent:</b> Thursday, January 19, 2017 2:04 PM<br>
<b>To:</b> Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtei=
n; Greg Mirsky<br>
<b>Cc:</b> Robert Sparks; mpls@ietf.org; gen-art@ietf.org; draft-ietf-mpls-=
residence-time.all@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Les,<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Shall we go with a sub-TL=
V of TLV 22
</span><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quo=
t;sans-serif&quot;;color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">[Les:] If that is t=
he direction the WG wants to go I am OK with it &#8211; but I do think this=
 proposal should be sent to the IS-IS WG for comment as well.<o:p></o:p></s=
pan></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">and promise to never ever=
 to do this again?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">[Les:] LOL&#8230;su=
re!<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les<o:=
p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Btw, I am extremely sorry=
 that we didn&#8217;t engage with the IS-IS community and I don&#8217;t kno=
w why we didn&#8217;t.&nbsp; As I said in an earlier email, we worked prett=
y extensively
 with Acee on the OSPF aspects and with Lou Berger on the RSVP-TE aspects a=
nd received a lot of useful feedback from both of them.<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John<o:p></o:p></span></p=
>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> Les Gi=
nsberg (ginsberg) [<a href=3D"mailto:ginsberg@cisco.com">mailto:ginsberg@ci=
sco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 4:55 PM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com"=
>acee@cisco.com</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexand=
er.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
 Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail=
.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John -<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> John E D=
rake [<a href=3D"mailto:jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 1:19 PM<br>
<b>To:</b> Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtei=
n; Greg Mirsky<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Les,<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">I understand and I have m=
ade the same argument in other contexts and with similar results (&#8220;&#=
8230; and your point is?&#8221;).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">[Les:] Nice to know=
 I am not completely alone.:-)<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">It would be good if=
 the authors/WG at least considered a non-IGP approach.<o:p></o:p></span></=
i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">However, if the IGP=
 approach is to be taken, the GENINFO definition currently in the draft is =
unacceptable for reasons I have previously given. So this
 should be reworked &#8211; probably to use a sub-TLV of TLV 22 et al.<o:p>=
</o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">The other alternati=
ve would be to define a GENINFO application that could support advertising =
many interface attributes &#8211; I don&#8217;t think anyone wants to
 go in that direction &#8211; certainly not me.<o:p></o:p></span></i></b></=
p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les<o:=
p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">However, as I indicated i=
n my previous email, RTM would be used as part of the network infrastructur=
e as a way to provide time synchronization between the nodes
 in the network, so I would consider it similar to the S-BFDs that Uma and =
you were discussing.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John<o:p></o:p></span></p=
>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> Les Gi=
nsberg (ginsberg) [<a href=3D"mailto:ginsberg@cisco.com">mailto:ginsberg@ci=
sco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 4:09 PM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com"=
>acee@cisco.com</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexand=
er.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
 Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail=
.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John &#8211;<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">The text you have excerpt=
ed below was trying to say two things:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">1)If you want to advertis=
e this in the IGPs the OSPF style proposal is much better from an implement=
ation standpoint than the IS-IS GENAPP proposal<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">2)There is a larger quest=
ion as to whether we should be using the IGPs for this at all<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Statement #1 should not b=
e interpreted to imply that I am advocating using the IGPs.
</span><span style=3D"font-size:11.0pt;font-family:Wingdings;color:#1F497D"=
>J</span><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">That said, we &#8220;ALWA=
YS&#8221; end up choosing using the IGPs to do this sort of thing &#8211; n=
ot because it is the &#8220;RIGHT&#8221; thing to do architecturally &#8211=
; but because it
 is so convenient.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">I am just asking for folk=
s to pause and think about this a bit more from an architectural perspectiv=
e.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> John E D=
rake [<a href=3D"mailto:jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 12:20 PM<br>
<b>To:</b> Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander Vainshtei=
n; Greg Mirsky<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Les,<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Comments inline.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John<o:p></o:p></span></p=
>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> Les Gi=
nsberg (ginsberg) [<a href=3D"mailto:ginsberg@cisco.com">mailto:ginsberg@ci=
sco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 12:25 PM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com"=
>acee@cisco.com</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexand=
er.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
 Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail=
.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John &#8211;<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">For me, this raises the a=
ge-old question of when it is/is not appropriate to use IGPs for flooding i=
nformation.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">This is clearly not TE in=
formation &#8211; you just happen to be using this in conjunction with MPLS=
 &#8211; but it is a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">[JD]&nbsp; RTM supp=
ort as defined in the draft would be used to provide extremely accurate tim=
e synchronization in an MPLS network so I would suggest that
 all nodes in such a network would be using it and hence that it does belon=
g in the IGP.&nbsp; As an aside, advertising it in the IGP facilitates incr=
emental or partial deployment.&nbsp; Your yesterday&#8217;s email supports =
this:&nbsp;
<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></=
span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">&#8220;It would see=
m more appropriate to treat RTM information either as:<o:p></o:p></span></i=
></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:=
#1F497D"><o:p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:=
#1F497D">&nbsp;&nbsp; o an extension to link attribute information already =
advertised by the IGPs (as has been suggested for OSPF) - which would
 suggest in IS-IS a sub-TLV of TLV 22(et al)<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:=
#1F497D"><o:p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">or<o:p></o:p></span=
></i></b></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.8pt"><b><i><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:=
#1F497D"><o:p>&nbsp;</o:p></span></i></b></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:27.6pt;text-indent:-.25i=
n"><span style=3D"font-size:11.0pt;font-family:Symbol;color:#1F497D">&middo=
t;</span><span style=3D"font-size:7.0pt;color:#1F497D">&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;
</span><b><i><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot=
;,&quot;sans-serif&quot;;color:#1F497D">As an interface attribute independe=
nt of routing protocols which could be retrieved utilizing network manageme=
nt tools&#8221;<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> John E D=
rake [<a href=3D"mailto:jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Acee,<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Relying on an omniscient =
controller is a non-starter in general and in particular because the protoc=
ol by which it would learn each node&#8217;s RTM capabilities
 and distribute them to the other nodes is undefined.&nbsp; Further, one of=
 the ways by which an omniscient controller learns a node&#8217;s capabilit=
ies is by snooping the link/state database.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John<o:p></o:p></span></p=
>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vai=
nshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky =
&lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
 Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg=
@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Hi John,&nbsp;<o:p></o:p></=
span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">John E Drake &lt;<a href=3D"mailto:jdra=
ke@juniper.net">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@e=
citele.com">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a hr=
ef=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<a hr=
ef=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft=
-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draf=
t-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>=
&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay =
Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<=
br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Acee,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">We discussed all of this =
with you over a year ago and used your guidance in adding the indication of=
 RTM capability to OSPF.</span><span style=3D"color:black"><o:p></o:p></spa=
n></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I&#8217;m sorry but I focus=
ed mainly on the OSPF protocol aspects then and didn&#8217;t question the u=
se case. This question came up in the IS-IS WG discussions.&nbsp;<o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thanks,<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Acee<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o:p></span></p=
>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours Irrespectively,</sp=
an><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">John</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&qu=
ot;;color:black"> Acee Lindem (acee) [<a href=3D"mailto:acee@cisco.com">mai=
lto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Gin=
sberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.c=
om</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">I guess what we were trying=
 to envision the use case and whether it makes sense for all the nodes in t=
he IGP routing domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Additionally, if it is need=
ed in the IGPs, should there also be a BGP-LS Link Attribute TLV proposed?&=
nbsp;</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Thanks,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">Acee&nbsp;</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">Alexander Vainshtein &lt;<a href=3D"mai=
lto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&=
gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Hi all,</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">I concur with Greg: from =
my POV an interoperable solution should not depend on an omniscient NMS cli=
ent distributing information about capabilities of each
 node to each other node. </span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Regards,</span><span styl=
e=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Sasha</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Office: &#43;972-39266302=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp; &#43;972-549266302</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#44546A">&nbsp;</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&qu=
ot;;color:black"> Greg Mirsky [<a href=3D"mailto:gregimirsky@gmail.com">mai=
lto:gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Greg &#8211;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">I am having trouble understanding your =
response.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">The question we are raising is whether =
we should extend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Saying that the IGP functionality is op=
tional and/or wouldn&#8217;t always be advertised doesn&#8217;t really
 answer the question of whether we should or should not define the IGP exte=
nsions.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">Could you respond more directly to this=
 point?</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1F497D">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
&quot;sans-serif&quot;;color:black">From:</span></b><span style=3D"font-siz=
e:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;;color:black"=
> Greg
 Mirsky [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">=
gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Greg,&nbsp;</span><span style=3D"color=
:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Although it is a bit late, we&#8217;ve ha=
d some discussions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Thanks,</span><span style=3D"color:black"=
><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Acee &nbsp;</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
&quot;sans-serif&quot;;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces=
@ietf.org" target=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Gre=
g Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gre=
gimirsky@gmail.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">thank you for the most expedient review a=
nd comments. I'll make changes in Section 2 per your suggestion.</span><spa=
n style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert =
Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjspar=
ks@nostrum.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">The changes all look good.</span><span style=3D=
"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">I still think you should say something in the d=
ocument about what &quot;the time of packet arrival&quot; and &quot;transmi=
ssion&quot; means, and call out the point you made about being careful to
 not introduce apparent jitter by not making those measurements consistentl=
y. (The definitions you point to in your earlier mail from G.8013 don't rea=
lly help - they just say &quot;time of packet arrival&quot;. Again, the fir=
st and last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">Please look at the new first paragraph of secti=
on 2 - there's a mix of &quot;as case&quot; and &quot;in case&quot; that sh=
ould be made consistent. I suspect it would be easiest to simply say &quot;=
referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">RjS</span><span style=3D"color:black"><o:p></o:=
p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Sasha Vainshtein came with elegant idea t=
o address disconnection between discussion of one-step and
 two-step modes that you've pointed out. We've moved Section 7 as sub-secti=
on into Section 2 now. Attached are updated diff and the proposed new versi=
on -13.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mir=
sky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimir=
sky@gmail.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">once again, thank you for your thorough r=
eview and the most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Regards,</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">Greg</span><span style=3D"color:black"><o=
:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert S=
parks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjspark=
s@nostrum.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sa=
ns-serif&quot;;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:black">&nbsp;</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>

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To: Uma Chunduri <uma.chunduri@huawei.com>, "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, John E Drake <jdrake@juniper.net>, "Acee Lindem (acee)" <acee@cisco.com>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
References: <148414970343.8167.4538946698521330202.idtracker@ietfa.amsl.com> <CA+RyBmU9W5QP4EjbPezoCpdLHv1RJCrzJvxQmeTnAvjO_6vbJA@mail.gmail.com> <CA+RyBmVrvyiwDp2kV3VLiQtqOaL=MaVjZugGbvgWnp6y3dwP3Q@mail.gmail.com> <95d41b52-5c85-869f-2139-6713816e9637@nostrum.com> <CA+RyBmWcvU70BZYRj8ZHUZrmkcwq1eHS38jFpyZOq3A_5eXZ9g@mail.gmail.com> <D4A55AE0.9483E%acee@cisco.com> <CA+RyBmWrDhZUmVN0t8aLsL6F3ZfnvBu8FW_2VjDmwj-ercLd5w@mail.gmail.com> <f315026a140148898250f8fa3bdb0123@XCH-ALN-001.cisco.com> <CA+RyBmWMBAXd+zntuAeOU9x7xs9BQSk7J-z9+yyUDvKPd3v2MA@mail.gmail.com> <HE1PR0301MB22660A73C0D5A96BA8F3F0D39D7E0@HE1PR0301MB2266.eurprd03.prod.outlook.com> <D4A65103.94DF0%acee@cisco.com> <DM5PR05MB3001952D0DDD2AA672697094C77E0@DM5PR05MB3001.namprd05.prod.outlook.com> <D4A6573B.94E53%acee@cisco.com> <DM5PR05MB3001ED6AF8296F5DBE5E38EFC77E0@DM5PR05MB3001.namprd05.prod.outlook.com> <3f43cfdfe76e437bb2df6159e5644ae5@XCH-ALN-001.cisco.com> <25B4902B1192E84696414485F57268540187782A@dfweml501-mbb>
From: Stewart Bryant <stewart.bryant@gmail.com>
Message-ID: <cf16c88b-1a3b-2637-7605-5a9472dda55f@gmail.com>
Date: Thu, 19 Jan 2017 23:04:03 +0000
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Cc: "mpls@ietf.org" <mpls@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, "Abhay Roy \(akr\)" <akr@cisco.com>, Robert Sparks <rjsparks@nostrum.com>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Well one scenario is that you would use SR to create the synchronization 
path, in which case you would need it to be in the IGP and flooded.

Stewart


On 19/01/2017 19:40, Uma Chunduri wrote:
>
> I support advertising this in IGP.
>
> >This is clearly not TE information –..
>
> >I do not see the IGPs as the appropriate mechanism to flood generic 
> interface capabilities
>
> We have instances where both the above are not met and we flooded 
> information.
>
> https://tools.ietf.org/html/rfc7883(Les, you co-authored the same!!)
>
> https://tools.ietf.org/html/rfc7880
>
> --
>
> Uma C.
>
> *From:*mpls [mailto:mpls-bounces@ietf.org] *On Behalf Of *Les Ginsberg 
> (ginsberg)
> *Sent:* Thursday, January 19, 2017 9:25 AM
> *To:* John E Drake <jdrake@juniper.net>; Acee Lindem (acee) 
> <acee@cisco.com>; Alexander Vainshtein 
> <Alexander.Vainshtein@ecitele.com>; Greg Mirsky <gregimirsky@gmail.com>
> *Cc:* Abhay Roy (akr) <akr@cisco.com>; mpls@ietf.org; 
> isis-chairs@ietf.org; gen-art@ietf.org; 
> draft-ietf-mpls-residence-time.all@ietf.org; Robert Sparks 
> <rjsparks@nostrum.com>; ietf@ietf.org
> *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
> John –
>
> For me, this raises the age-old question of when it is/is not 
> appropriate to use IGPs for flooding information.
>
> This is clearly not TE information – you just happen to be using this 
> in conjunction with MPLS – but it is a generic capability. I do not 
> see the IGPs as the appropriate mechanism to flood generic interface 
> capabilities. It also, as Acee has pointed out, results in flooding 
> information to all nodes in the domain when only a few care about it.
>
> Les
>
> *From:*John E Drake [mailto:jdrake@juniper.net]
> *Sent:* Thursday, January 19, 2017 8:54 AM
> *To:* Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les 
> Ginsberg (ginsberg)
> *Cc:* Robert Sparks; mpls@ietf.org <mailto:mpls@ietf.org>; 
> gen-art@ietf.org <mailto:gen-art@ietf.org>; 
> draft-ietf-mpls-residence-time.all@ietf.org 
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org 
> <mailto:ietf@ietf.org>; isis-chairs@ietf.org 
> <mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
> *Subject:* RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
> Acee,
>
> Relying on an omniscient controller is a non-starter in general and in 
> particular because the protocol by which it would learn each node’s 
> RTM capabilities and distribute them to the other nodes is undefined.  
> Further, one of the ways by which an omniscient controller learns a 
> node’s capabilities is by snooping the link/state database.
>
> Yours Irrespectively,
>
> John
>
> *From:*Acee Lindem (acee) [mailto:acee@cisco.com]
> *Sent:* Thursday, January 19, 2017 11:47 AM
> *To:* John E Drake <jdrake@juniper.net <mailto:jdrake@juniper.net>>; 
> Alexander Vainshtein <Alexander.Vainshtein@ecitele.com 
> <mailto:Alexander.Vainshtein@ecitele.com>>; Greg Mirsky 
> <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>; Les Ginsberg 
> (ginsberg) <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
> *Cc:* Robert Sparks <rjsparks@nostrum.com 
> <mailto:rjsparks@nostrum.com>>; mpls@ietf.org <mailto:mpls@ietf.org>; 
> gen-art@ietf.org <mailto:gen-art@ietf.org>; 
> draft-ietf-mpls-residence-time.all@ietf.org 
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org 
> <mailto:ietf@ietf.org>; isis-chairs@ietf.org 
> <mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com 
> <mailto:akr@cisco.com>>
> *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
> Hi John,
>
> *From: *John E Drake <jdrake@juniper.net <mailto:jdrake@juniper.net>>
> *Date: *Thursday, January 19, 2017 at 10:43 AM
> *To: *Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>, Alexander 
> Vainshtein <Alexander.Vainshtein@ecitele.com 
> <mailto:Alexander.Vainshtein@ecitele.com>>, Greg Mirsky 
> <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>, "Les Ginsberg 
> (ginsberg)" <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
> *Cc: *Robert Sparks <rjsparks@nostrum.com 
> <mailto:rjsparks@nostrum.com>>, "mpls@ietf.org <mailto:mpls@ietf.org>" 
> <mpls@ietf.org <mailto:mpls@ietf.org>>, "gen-art@ietf.org 
> <mailto:gen-art@ietf.org>" <gen-art@ietf.org 
> <mailto:gen-art@ietf.org>>, 
> "draft-ietf-mpls-residence-time.all@ietf.org 
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>" 
> <draft-ietf-mpls-residence-time.all@ietf.org 
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org 
> <mailto:ietf@ietf.org>" <ietf@ietf.org <mailto:ietf@ietf.org>>, 
> "isis-chairs@ietf.org <mailto:isis-chairs@ietf.org>" 
> <isis-chairs@ietf.org <mailto:isis-chairs@ietf.org>>, "Abhay Roy 
> (akr)" <akr@cisco.com <mailto:akr@cisco.com>>
> *Subject: *RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>     Acee,
>
>     We discussed all of this with you over a year ago and used your
>     guidance in adding the indication of RTM capability to OSPF.
>
> I’m sorry but I focused mainly on the OSPF protocol aspects then and 
> didn’t question the use case. This question came up in the IS-IS WG 
> discussions.
>
> Thanks,
>
> Acee
>
>     Yours Irrespectively,
>
>     John
>
>     *From:*Acee Lindem (acee) [mailto:acee@cisco.com]
>     *Sent:* Thursday, January 19, 2017 11:38 AM
>     *To:* Alexander Vainshtein <Alexander.Vainshtein@ecitele.com
>     <mailto:Alexander.Vainshtein@ecitele.com>>; Greg Mirsky
>     <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>; Les
>     Ginsberg (ginsberg) <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
>     *Cc:* Robert Sparks <rjsparks@nostrum.com
>     <mailto:rjsparks@nostrum.com>>; mpls@ietf.org
>     <mailto:mpls@ietf.org>; gen-art@ietf.org
>     <mailto:gen-art@ietf.org>;
>     draft-ietf-mpls-residence-time.all@ietf.org
>     <mailto:draft-ietf-mpls-residence-time.all@ietf.org>;
>     ietf@ietf.org <mailto:ietf@ietf.org>; isis-chairs@ietf.org
>     <mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com
>     <mailto:akr@cisco.com>>
>     *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>     I guess what we were trying to envision the use case and whether
>     it makes sense for all the nodes in the IGP routing domain to have
>     this information. Would the LSP ingress LSR only need to if the
>     egress LSR supports RTM and it is best effort recording for
>     transit LSRs in the path?
>
>     Additionally, if it is needed in the IGPs, should there also be a
>     BGP-LS Link Attribute TLV proposed?
>
>     Thanks,
>
>     Acee
>
>     *From: *Alexander Vainshtein <Alexander.Vainshtein@ecitele.com
>     <mailto:Alexander.Vainshtein@ecitele.com>>
>     *Date: *Thursday, January 19, 2017 at 10:15 AM
>     *To: *Greg Mirsky <gregimirsky@gmail.com
>     <mailto:gregimirsky@gmail.com>>, "Les Ginsberg (ginsberg)"
>     <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
>     *Cc: *Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>, Robert
>     Sparks <rjsparks@nostrum.com <mailto:rjsparks@nostrum.com>>,
>     "mpls@ietf.org <mailto:mpls@ietf.org>" <mpls@ietf.org
>     <mailto:mpls@ietf.org>>, "gen-art@ietf.org
>     <mailto:gen-art@ietf.org>" <gen-art@ietf.org
>     <mailto:gen-art@ietf.org>>,
>     "draft-ietf-mpls-residence-time.all@ietf.org
>     <mailto:draft-ietf-mpls-residence-time.all@ietf.org>"
>     <draft-ietf-mpls-residence-time.all@ietf.org
>     <mailto:draft-ietf-mpls-residence-time.all@ietf.org>>,
>     "ietf@ietf.org <mailto:ietf@ietf.org>" <ietf@ietf.org
>     <mailto:ietf@ietf.org>>, "isis-chairs@ietf.org
>     <mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org
>     <mailto:isis-chairs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com
>     <mailto:akr@cisco.com>>
>     *Subject: *RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>         Hi all,
>
>         I concur with Greg: from my POV an interoperable solution
>         should not depend on an omniscient NMS client distributing
>         information about capabilities of each node to each other node.
>
>         Regards,
>
>         Sasha
>
>         Office: +972-39266302
>
>         Cell: +972-549266302
>
>         Email: Alexander.Vainshtein@ecitele.com
>         <mailto:Alexander.Vainshtein@ecitele.com>
>
>         *From:*Greg Mirsky [mailto:gregimirsky@gmail.com]
>         *Sent:* Thursday, January 19, 2017 6:01 PM
>         *To:* Les Ginsberg (ginsberg) <ginsberg@cisco.com
>         <mailto:ginsberg@cisco.com>>
>         *Cc:* Acee Lindem (acee) <acee@cisco.com
>         <mailto:acee@cisco.com>>; Robert Sparks <rjsparks@nostrum.com
>         <mailto:rjsparks@nostrum.com>>; mpls@ietf.org
>         <mailto:mpls@ietf.org>; gen-art@ietf.org
>         <mailto:gen-art@ietf.org>;
>         draft-ietf-mpls-residence-time.all@ietf.org
>         <mailto:draft-ietf-mpls-residence-time.all@ietf.org>;
>         ietf@ietf.org <mailto:ietf@ietf.org>; isis-chairs@ietf.org
>         <mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com
>         <mailto:akr@cisco.com>>
>         *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>         Hi Les,
>
>         I believe that IGP extensions to advertise RTM capability are
>         required.
>
>         Regards,
>
>         Greg
>
>         On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg)
>         <ginsberg@cisco.com <mailto:ginsberg@cisco.com>> wrote:
>
>             Greg –
>
>             I am having trouble understanding your response.
>
>             The question we are raising is whether we should extend
>             the IGPs to support advertising RTM capability – an
>             alternative being to retrieve the capability via network
>             management.
>
>             Saying that the IGP functionality is optional and/or
>             wouldn’t always be advertised doesn’t really answer the
>             question of whether we should or should not define the IGP
>             extensions.
>
>             Could you respond more directly to this point?
>
>             Les
>
>             *From:*Greg Mirsky [mailto:gregimirsky@gmail.com
>             <mailto:gregimirsky@gmail.com>]
>             *Sent:* Thursday, January 19, 2017 7:44 AM
>             *To:* Acee Lindem (acee)
>             *Cc:* Robert Sparks; mpls@ietf.org <mailto:mpls@ietf.org>;
>             gen-art@ietf.org <mailto:gen-art@ietf.org>;
>             draft-ietf-mpls-residence-time.all@ietf.org
>             <mailto:draft-ietf-mpls-residence-time.all@ietf.org>;
>             ietf@ietf.org <mailto:ietf@ietf.org>; Les Ginsberg
>             (ginsberg); isis-chairs@ietf.org
>             <mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
>
>
>             *Subject:* Re: [mpls] Review of
>             draft-ietf-mpls-residence-time-12
>
>             Hi Acee,
>
>             the draft defines optional functionality. If an operator
>             has no use neither for PTP's Transparent Clock, nor RTM
>             itself as performance metric, then RTM sub-TLV would not
>             be included and thus it would not be flooded. Of course,
>             it be right to reflect RTM capability through YANG data
>             model, thus allowing SDN scenario you've described.
>
>             Regards,
>
>             Greg
>
>             On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee)
>             <acee@cisco.com <mailto:acee@cisco.com>> wrote:
>
>             Hi Greg,
>
>             Although it is a bit late, we’ve had some discussions
>             amongst the IS-IS and OSPF chairs and are wondering
>             whether the interface capability belongs in the IGPs. This
>             will be flooded throughout the entire routing domain – is
>             it really needed on every node or will it the RTM testing
>             be initiated from an omniscient NMS client that would know
>             the capabilities of each node or easily query them using
>             YANG?
>
>             Thanks,
>
>             Acee
>
>             *From: *mpls <mpls-bounces@ietf.org
>             <mailto:mpls-bounces@ietf.org>> on behalf of Greg Mirsky
>             <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>
>             *Date: *Wednesday, January 18, 2017 at 1:25 PM
>             *To: *Robert Sparks <rjsparks@nostrum.com
>             <mailto:rjsparks@nostrum.com>>
>             *Cc: *"mpls@ietf.org <mailto:mpls@ietf.org>"
>             <mpls@ietf.org <mailto:mpls@ietf.org>>, "gen-art@ietf.org
>             <mailto:gen-art@ietf.org>" <gen-art@ietf.org
>             <mailto:gen-art@ietf.org>>,
>             "draft-ietf-mpls-residence-time.all@ietf.org
>             <mailto:draft-ietf-mpls-residence-time.all@ietf.org>"
>             <draft-ietf-mpls-residence-time.all@ietf.org
>             <mailto:draft-ietf-mpls-residence-time.all@ietf.org>>,
>             "ietf@ietf.org <mailto:ietf@ietf.org>" <ietf@ietf.org
>             <mailto:ietf@ietf.org>>
>             *Subject: *Re: [mpls] Review of
>             draft-ietf-mpls-residence-time-12
>
>                 Hi Robert,
>
>                 thank you for the most expedient review and comments.
>                 I'll make changes in Section 2 per your suggestion.
>
>                 Regards,
>
>                 Greg
>
>                 On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks
>                 <rjsparks@nostrum.com <mailto:rjsparks@nostrum.com>>
>                 wrote:
>
>                 The changes all look good.
>
>                 I still think you should say something in the document
>                 about what "the time of packet arrival" and
>                 "transmission" means, and call out the point you made
>                 about being careful to not introduce apparent jitter
>                 by not making those measurements consistently. (The
>                 definitions you point to in your earlier mail from
>                 G.8013 don't really help - they just say "time of
>                 packet arrival". Again, the first and last bit are
>                 likely to be several nanoseconds apart so I think it
>                 matters. Perhaps you're saying it doesn't matter as
>                 long as each node is consistent (there will be error
>                 in the residence time measurement, but it will be
>                 constant at each node, so the sum of errors will be
>                 constant, and the clocks will be ok?)
>
>                 Please look at the new first paragraph of section 2 -
>                 there's a mix of "as case" and "in case" that should
>                 be made consistent. I suspect it would be easiest to
>                 simply say "referred to as using a one-step clock" and
>                 "referred to as using a two-step clock" or similar.
>
>                 RjS
>
>                 On 1/18/17 12:03 PM, Greg Mirsky wrote:
>
>                     Hi Robert,
>
>                     Sasha Vainshtein came with elegant idea to address
>                     disconnection between discussion of one-step and
>                     two-step modes that you've pointed out. We've
>                     moved Section 7 as sub-section into Section 2 now.
>                     Attached are updated diff and the proposed new
>                     version -13.
>
>                     Regards,
>
>                     Greg
>
>                     On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky
>                     <gregimirsky@gmail.com
>                     <mailto:gregimirsky@gmail.com>> wrote:
>
>                     Hi Robert,
>
>                     once again, thank you for your thorough review and
>                     the most detailed comments. I've prepared updated
>                     version and would greatly appreciate if you review
>                     the changes and let us know whether your comments
>                     been addressed. Attached are diff and the new version.
>
>                     Regards,
>
>                     Greg
>
>                     On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks
>                     <rjsparks@nostrum.com
>                     <mailto:rjsparks@nostrum.com>> wrote:
>
>                         Reviewer: Robert Sparks
>                         Review result: Ready with Nits
>
>                         I am the assigned Gen-ART reviewer for this
>                         draft. The General Area
>                         Review Team (Gen-ART) reviews all IETF
>                         documents being processed
>                         by the IESG for the IETF Chair.  Please treat
>                         these comments just
>                         like any other last call comments.
>
>                         For more information, please see the FAQ at
>                         <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
>
>                         Document: draft-ietf-mpls-residence-time-12
>                         Reviewer: Robert Sparks
>                         Review Date: 2017-01-10
>                         IETF LC End Date: 2017-01-17
>                         IESG Telechat date: 2017-02-02
>
>                         Summary: Ready (with nits) for publication as
>                         a Proposed Standard
>
>                         I have two primary comments. I expect both are
>                         rooted in the authors
>                         and working group knowing what the document
>                         means instead of seeing
>                         what
>                         it says or doesn't say:
>
>                         1) The document is loose with its use of
>                         'packet', and where TTLs
>                         appear when
>                         they are discussed. It might be helpful to
>                         rephrase the text that
>                         speaks
>                         of RTM packets in terms of RTM messages that
>                         are encoded as G-ACh
>                         messages and
>                         not refer to packets unless you mean the whole
>                         encapsulated packet
>                         with MPLS
>                         header, ACH, and G-ACh message.
>
>                         2) Since this new mechanic speaks in terms of
>                         fractional nanoseconds,
>                         some
>                         discussion of what trigger-point you intend
>                         people to use for taking
>                         the
>                         precise time of a packet's arrival or
>                         departure seems warranted. (The
>                         first and
>                         last bit of the whole encapsulated packet
>                         above are going to appear at
>                         the
>                         physical layer many nanoseconds apart at OC192
>                         speeds if I've done the
>                         math
>                         right). It may be obvious to the folks
>                         discussing this, but it's not
>                         obvious
>                         from the document.  If it's _not_ obvious and
>                         variation in technique
>                         is
>                         expected, then some discussion about issues
>                         that might arise from
>                         different
>                         implementation choices would be welcome.
>
>                         The rest of these are editorial nits:
>
>                         It would help to pull an overview description
>                         of the difference
>                         between
>                         one-step and two-step much earlier in the
>                         document. I suggest in the
>                         overview
>                         in section 2. Otherwise, the reader really has
>                         to jump forward and
>                         read section
>                         7 before section 3's 5th bullet makes any sense.
>
>                         In section 3, "IANA will be asked" should be
>                         made active. Say "This
>                         document
>                         asks IANA to" and point to the IANA
>                         consideration section. Apply
>                         similar
>                         treatment to the other places where you talk
>                         about future IANA
>                         actions.
>
>                         There are several places where there are
>                         missing words (typically
>                         articles or
>                         prepositions). You're less likely to end up
>                         with misinterpretations
>                         during the
>                         RFC Editor phase if you provide them before
>                         the document gets that far
>                         in the
>                         process. The spots I found most disruptive
>                         were these (this is not
>                         intended to
>                         be exhaustive):
>
>                           Section 3: "set 1 according" -> "set to 1
>                         according"
>                           Section 3: "the Table 19 [IEEE..." -> "Table
>                         19 of [IEEE..."
>                           Section 4.2: "Detailed discussion of ...
>                         modes in Section 7."
>                         -> "Detailed discussion of ... modes appears
>                         in Section 7."
>                           Section 10: "most of" -> "most of all"
>
>                         In Setion 3.1 at "identity of the source
>                         port", please point into the
>                         document
>                         that defines this identity and its
>                         representation. I suspect this is a
>                         pointer
>                         into a specific section in IEEE.1588.2008].
>


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    <p>Well one scenario is that you would use SR to create the
      synchronization path, in which case you would need it to be in the
      IGP and flooded.</p>
    <p>Stewart<br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 19/01/2017 19:40, Uma Chunduri
      wrote:<br>
    </div>
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      <div class="WordSection1">
        <p class="MsoNormal"><a moz-do-not-send="true"
            name="_MailEndCompose"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">I
              support advertising this in IGP.<o:p></o:p></span></a></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
        <div>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">&gt;</span><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">This
              is clearly not TE information –..<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">&gt;I
              do not see the IGPs as the appropriate mechanism to flood
              generic interface capabilities<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">We
              have instances where both the above are not met and we
              flooded information.<o:p></o:p></span></p>
          <p class="MsoNormal"><a moz-do-not-send="true"
              href="https://tools.ietf.org/html/rfc7883"><span
                style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">https://tools.ietf.org/html/rfc7883</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">
              (Les, you co-authored the same!!)<o:p></o:p></span></p>
          <p class="MsoNormal"><a moz-do-not-send="true"
              href="https://tools.ietf.org/html/rfc7880"><span
                style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">https://tools.ietf.org/html/rfc7880</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">--</span><span
              style="font-size:11.0pt;font-family:&quot;Freestyle
              Script&quot;;color:#1F497D"><o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Uma
              C.</span><span
              style="font-size:11.0pt;font-family:&quot;Brush Script
              MT&quot;;color:#1F497D"><o:p></o:p></span></p>
        </div>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
        <div>
          <div style="border:none;border-top:solid #E1E1E1
            1.0pt;padding:3.0pt 0in 0in 0in">
            <p class="MsoNormal"><b><span
                  style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">
                mpls [<a class="moz-txt-link-freetext" href="mailto:mpls-bounces@ietf.org">mailto:mpls-bounces@ietf.org</a>]
                <b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
                <b>Sent:</b> Thursday, January 19, 2017 9:25 AM<br>
                <b>To:</b> John E Drake <a class="moz-txt-link-rfc2396E" href="mailto:jdrake@juniper.net">&lt;jdrake@juniper.net&gt;</a>; Acee
                Lindem (acee) <a class="moz-txt-link-rfc2396E" href="mailto:acee@cisco.com">&lt;acee@cisco.com&gt;</a>; Alexander
                Vainshtein <a class="moz-txt-link-rfc2396E" href="mailto:Alexander.Vainshtein@ecitele.com">&lt;Alexander.Vainshtein@ecitele.com&gt;</a>;
                Greg Mirsky <a class="moz-txt-link-rfc2396E" href="mailto:gregimirsky@gmail.com">&lt;gregimirsky@gmail.com&gt;</a><br>
                <b>Cc:</b> Abhay Roy (akr) <a class="moz-txt-link-rfc2396E" href="mailto:akr@cisco.com">&lt;akr@cisco.com&gt;</a>;
                <a class="moz-txt-link-abbreviated" href="mailto:mpls@ietf.org">mpls@ietf.org</a>; <a class="moz-txt-link-abbreviated" href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; <a class="moz-txt-link-abbreviated" href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>;
                <a class="moz-txt-link-abbreviated" href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>; Robert
                Sparks <a class="moz-txt-link-rfc2396E" href="mailto:rjsparks@nostrum.com">&lt;rjsparks@nostrum.com&gt;</a>; <a class="moz-txt-link-abbreviated" href="mailto:ietf@ietf.org">ietf@ietf.org</a><br>
                <b>Subject:</b> Re: [mpls] Review of
                draft-ietf-mpls-residence-time-12<o:p></o:p></span></p>
          </div>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">John
            –<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">For
            me, this raises the age-old question of when it is/is not
            appropriate to use IGPs for flooding information.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">This
            is clearly not TE information – you just happen to be using
            this in conjunction with MPLS – but it is a generic
            capability. I do not see the IGPs as the appropriate
            mechanism to flood generic interface capabilities. It also,
            as Acee has pointed out, results in flooding information to
            all nodes in the domain when only a few care about it.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">  
            Les<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
        <div style="border:none;border-left:solid blue 1.5pt;padding:0in
          0in 0in 4.0pt">
          <div>
            <div style="border:none;border-top:solid #B5C4DF
              1.0pt;padding:3.0pt 0in 0in 0in">
              <p class="MsoNormal"><b><span
                    style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">From:</span></b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif"> John
                  E Drake [<a moz-do-not-send="true"
                    href="mailto:jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
                  <br>
                  <b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
                  <b>To:</b> Acee Lindem (acee); Alexander Vainshtein;
                  Greg Mirsky; Les Ginsberg (ginsberg)<br>
                  <b>Cc:</b> Robert Sparks; <a moz-do-not-send="true"
                    href="mailto:mpls@ietf.org">mpls@ietf.org</a>; <a
                    moz-do-not-send="true"
                    href="mailto:gen-art@ietf.org">
                    gen-art@ietf.org</a>; <a moz-do-not-send="true"
                    href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">
                    draft-ietf-mpls-residence-time.all@ietf.org</a>; <a
                    moz-do-not-send="true" href="mailto:ietf@ietf.org">ietf@ietf.org</a>;
                  <a moz-do-not-send="true"
                    href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>;
                  Abhay Roy (akr)<br>
                  <b>Subject:</b> RE: [mpls] Review of
                  draft-ietf-mpls-residence-time-12<o:p></o:p></span></p>
            </div>
          </div>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Acee,<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Relying
              on an omniscient controller is a non-starter in general
              and in particular because the protocol by which it would
              learn each node’s RTM capabilities and distribute them to
              the other nodes is undefined.  Further, one of the ways by
              which an omniscient controller learns a node’s
              capabilities is by snooping the link/state database.<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
          <div>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Yours
                Irrespectively,<o:p></o:p></span></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
          </div>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
          <div style="border:none;border-left:solid blue
            1.5pt;padding:0in 0in 0in 4.0pt">
            <div>
              <div style="border:none;border-top:solid #E1E1E1
                1.0pt;padding:3.0pt 0in 0in 0in">
                <p class="MsoNormal"><b><span
                      style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">
                    Acee Lindem (acee) [<a moz-do-not-send="true"
                      href="mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
                    <br>
                    <b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
                    <b>To:</b> John E Drake &lt;<a
                      moz-do-not-send="true"
                      href="mailto:jdrake@juniper.net">jdrake@juniper.net</a>&gt;;
                    Alexander Vainshtein &lt;<a moz-do-not-send="true"
                      href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
                    Greg Mirsky &lt;<a moz-do-not-send="true"
                      href="mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
                    Les Ginsberg (ginsberg) &lt;<a
                      moz-do-not-send="true"
                      href="mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
                    <b>Cc:</b> Robert Sparks &lt;<a
                      moz-do-not-send="true"
                      href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;;
                    <a moz-do-not-send="true"
                      href="mailto:mpls@ietf.org">mpls@ietf.org</a>; <a
                      moz-do-not-send="true"
                      href="mailto:gen-art@ietf.org">
                      gen-art@ietf.org</a>; <a moz-do-not-send="true"
                      href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">
                      draft-ietf-mpls-residence-time.all@ietf.org</a>; <a
                      moz-do-not-send="true" href="mailto:ietf@ietf.org">ietf@ietf.org</a>;
                    <a moz-do-not-send="true"
                      href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>;
                    Abhay Roy (akr) &lt;<a moz-do-not-send="true"
                      href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
                    <b>Subject:</b> Re: [mpls] Review of
                    draft-ietf-mpls-residence-time-12<o:p></o:p></span></p>
              </div>
            </div>
            <p class="MsoNormal"><o:p> </o:p></p>
            <div>
              <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Hi
                  John, <o:p></o:p></span></p>
            </div>
            <div>
              <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><o:p> </o:p></span></p>
            </div>
            <div style="border:none;border-top:solid #B5C4DF
              1.0pt;padding:3.0pt 0in 0in 0in">
              <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">From:
                  </span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">John
                  E Drake &lt;<a moz-do-not-send="true"
                    href="mailto:jdrake@juniper.net">jdrake@juniper.net</a>&gt;<br>
                  <b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
                  <b>To: </b>Acee Lindem &lt;<a moz-do-not-send="true"
                    href="mailto:acee@cisco.com">acee@cisco.com</a>&gt;,
                  Alexander Vainshtein &lt;<a moz-do-not-send="true"
                    href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;,
                  Greg Mirsky &lt;<a moz-do-not-send="true"
                    href="mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
                  "Les Ginsberg (ginsberg)" &lt;<a
                    moz-do-not-send="true"
                    href="mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
                  <b>Cc: </b>Robert Sparks &lt;<a
                    moz-do-not-send="true"
                    href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;,
                  "<a moz-do-not-send="true" href="mailto:mpls@ietf.org">mpls@ietf.org</a>"
                  &lt;<a moz-do-not-send="true"
                    href="mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, "<a
                    moz-do-not-send="true"
                    href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>"
                  &lt;<a moz-do-not-send="true"
                    href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
                  "<a moz-do-not-send="true"
                    href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>"
                  &lt;<a moz-do-not-send="true"
                    href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;,
                  "<a moz-do-not-send="true" href="mailto:ietf@ietf.org">ietf@ietf.org</a>"
                  &lt;<a moz-do-not-send="true"
                    href="mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, "<a
                    moz-do-not-send="true"
                    href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>"
                  &lt;<a moz-do-not-send="true"
                    href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;,
                  "Abhay Roy (akr)" &lt;<a moz-do-not-send="true"
                    href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
                  <b>Subject: </b>RE: [mpls] Review of
                  draft-ietf-mpls-residence-time-12<o:p></o:p></span></p>
            </div>
            <div>
              <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><o:p> </o:p></span></p>
            </div>
            <blockquote style="border:none;border-left:solid #B5C4DF
              4.5pt;padding:0in 0in 0in
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt"
              id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
              <div>
                <div>
                  <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Acee,</span><span
                      style="color:black"><o:p></o:p></span></p>
                  <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><span
                      style="color:black"><o:p></o:p></span></p>
                  <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">We
                      discussed all of this with you over a year ago and
                      used your guidance in adding the indication of RTM
                      capability to OSPF.</span><span
                      style="color:black"><o:p></o:p></span></p>
                </div>
              </div>
            </blockquote>
            <div>
              <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><o:p> </o:p></span></p>
            </div>
            <div>
              <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">I’m
                  sorry but I focused mainly on the OSPF protocol
                  aspects then and didn’t question the use case. This
                  question came up in the IS-IS WG discussions. <o:p></o:p></span></p>
            </div>
            <div>
              <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><o:p> </o:p></span></p>
            </div>
            <div>
              <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Thanks,<o:p></o:p></span></p>
            </div>
            <div>
              <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Acee<o:p></o:p></span></p>
            </div>
            <div>
              <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"><o:p> </o:p></span></p>
            </div>
            <blockquote style="border:none;border-left:solid #B5C4DF
              4.5pt;padding:0in 0in 0in
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt"
              id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
              <div>
                <div>
                  <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><span
                      style="color:black"><o:p></o:p></span></p>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Yours
                        Irrespectively,</span><span style="color:black"><o:p></o:p></span></p>
                    <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><span
                        style="color:black"><o:p></o:p></span></p>
                    <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">John</span><span
                        style="color:black"><o:p></o:p></span></p>
                  </div>
                  <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><span
                      style="color:black"><o:p></o:p></span></p>
                  <div style="border:none;border-left:solid blue
                    1.5pt;padding:0in 0in 0in 4.0pt">
                    <div>
                      <div style="border:none;border-top:solid #E1E1E1
                        1.0pt;padding:3.0pt 0in 0in 0in">
                        <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">
                            Acee Lindem (acee) [<a
                              moz-do-not-send="true"
                              href="mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
                            <br>
                            <b>Sent:</b> Thursday, January 19, 2017
                            11:38 AM<br>
                            <b>To:</b> Alexander Vainshtein &lt;<a
                              moz-do-not-send="true"
                              href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
                            Greg Mirsky &lt;<a moz-do-not-send="true"
                              href="mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
                            Les Ginsberg (ginsberg) &lt;<a
                              moz-do-not-send="true"
                              href="mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
                            <b>Cc:</b> Robert Sparks &lt;<a
                              moz-do-not-send="true"
                              href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;;
                            <a moz-do-not-send="true"
                              href="mailto:mpls@ietf.org">mpls@ietf.org</a>;
                            <a moz-do-not-send="true"
                              href="mailto:gen-art@ietf.org">
                              gen-art@ietf.org</a>; <a
                              moz-do-not-send="true"
                              href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a
                              moz-do-not-send="true"
                              href="mailto:ietf@ietf.org">ietf@ietf.org</a>;
                            <a moz-do-not-send="true"
                              href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>;
                            Abhay Roy (akr) &lt;<a
                              moz-do-not-send="true"
                              href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
                            <b>Subject:</b> Re: [mpls] Review of
                            draft-ietf-mpls-residence-time-12</span><span
                            style="color:black"><o:p></o:p></span></p>
                      </div>
                    </div>
                    <p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
                    <div>
                      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">I
                          guess what we were trying to envision the use
                          case and whether it makes sense for all the
                          nodes in the IGP routing domain to have this
                          information. Would the LSP ingress LSR only
                          need to if the egress LSR supports RTM and it
                          is best effort recording for transit LSRs in
                          the path?  </span><span style="color:black"><o:p></o:p></span></p>
                    </div>
                    <div>
                      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
                          style="color:black"><o:p></o:p></span></p>
                    </div>
                    <div>
                      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Additionally,
                          if it is needed in the IGPs, should there also
                          be a BGP-LS Link Attribute TLV proposed? </span><span
                          style="color:black"><o:p></o:p></span></p>
                    </div>
                    <div>
                      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
                          style="color:black"><o:p></o:p></span></p>
                    </div>
                    <div>
                      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Thanks,</span><span
                          style="color:black"><o:p></o:p></span></p>
                    </div>
                    <div>
                      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Acee </span><span
                          style="color:black"><o:p></o:p></span></p>
                    </div>
                    <div>
                      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
                          style="color:black"><o:p></o:p></span></p>
                    </div>
                    <div style="border:none;border-top:solid #B5C4DF
                      1.0pt;padding:3.0pt 0in 0in 0in">
                      <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">From:
                          </span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Alexander
                          Vainshtein &lt;<a moz-do-not-send="true"
                            href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;<br>
                          <b>Date: </b>Thursday, January 19, 2017 at
                          10:15 AM<br>
                          <b>To: </b>Greg Mirsky &lt;<a
                            moz-do-not-send="true"
                            href="mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
                          "Les Ginsberg (ginsberg)" &lt;<a
                            moz-do-not-send="true"
                            href="mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
                          <b>Cc: </b>Acee Lindem &lt;<a
                            moz-do-not-send="true"
                            href="mailto:acee@cisco.com">acee@cisco.com</a>&gt;,
                          Robert Sparks &lt;<a moz-do-not-send="true"
                            href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;,
                          "<a moz-do-not-send="true"
                            href="mailto:mpls@ietf.org">mpls@ietf.org</a>"
                          &lt;<a moz-do-not-send="true"
                            href="mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
                          "<a moz-do-not-send="true"
                            href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>"
                          &lt;<a moz-do-not-send="true"
                            href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
                          "<a moz-do-not-send="true"
                            href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>"
                          &lt;<a moz-do-not-send="true"
                            href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;,
                          "<a moz-do-not-send="true"
                            href="mailto:ietf@ietf.org">ietf@ietf.org</a>"
                          &lt;<a moz-do-not-send="true"
                            href="mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;,
                          "<a moz-do-not-send="true"
                            href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>"
                          &lt;<a moz-do-not-send="true"
                            href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;,
                          "Abhay Roy (akr)" &lt;<a
                            moz-do-not-send="true"
                            href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
                          <b>Subject: </b>RE: [mpls] Review of
                          draft-ietf-mpls-residence-time-12</span><span
                          style="color:black"><o:p></o:p></span></p>
                    </div>
                    <div>
                      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
                          style="color:black"><o:p></o:p></span></p>
                    </div>
                    <blockquote style="border:none;border-left:solid
                      #B5C4DF 4.5pt;padding:0in 0in 0in
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt"
                      id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
                      <div>
                        <div>
                          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">Hi
                              all,</span><span style="color:black"><o:p></o:p></span></p>
                          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">I
                              concur with Greg: from my POV an
                              interoperable solution should not depend
                              on an omniscient NMS client distributing
                              information about capabilities of each
                              node to each other node. </span><span
                              style="color:black"><o:p></o:p></span></p>
                          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A"> </span><span
                              style="color:black"><o:p></o:p></span></p>
                          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A"> </span><span
                              style="color:black"><o:p></o:p></span></p>
                          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">Regards,</span><span
                              style="color:black"><o:p></o:p></span></p>
                          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">Sasha</span><span
                              style="color:black"><o:p></o:p></span></p>
                          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A"> </span><span
                              style="color:black"><o:p></o:p></span></p>
                          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">Office:
                              +972-39266302</span><span
                              style="color:black"><o:p></o:p></span></p>
                          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">Cell:     
                              +972-549266302</span><span
                              style="color:black"><o:p></o:p></span></p>
                          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">Email:  
                              <a moz-do-not-send="true"
                                href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a></span><span
                              style="color:black"><o:p></o:p></span></p>
                          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A"> </span><span
                              style="color:black"><o:p></o:p></span></p>
                          <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">
                              Greg Mirsky [<a moz-do-not-send="true"
                                href="mailto:gregimirsky@gmail.com">mailto:gregimirsky@gmail.com</a>]
                              <br>
                              <b>Sent:</b> Thursday, January 19, 2017
                              6:01 PM<br>
                              <b>To:</b> Les Ginsberg (ginsberg) &lt;<a
                                moz-do-not-send="true"
                                href="mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
                              <b>Cc:</b> Acee Lindem (acee) &lt;<a
                                moz-do-not-send="true"
                                href="mailto:acee@cisco.com">acee@cisco.com</a>&gt;;
                              Robert Sparks &lt;<a
                                moz-do-not-send="true"
                                href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;;
                              <a moz-do-not-send="true"
                                href="mailto:mpls@ietf.org">mpls@ietf.org</a>;
                              <a moz-do-not-send="true"
                                href="mailto:gen-art@ietf.org">
                                gen-art@ietf.org</a>; <a
                                moz-do-not-send="true"
                                href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a
                                moz-do-not-send="true"
                                href="mailto:ietf@ietf.org">ietf@ietf.org</a>;
                              <a moz-do-not-send="true"
                                href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>;
                              Abhay Roy (akr) &lt;<a
                                moz-do-not-send="true"
                                href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
                              <b>Subject:</b> Re: [mpls] Review of
                              draft-ietf-mpls-residence-time-12</span><span
                              style="color:black"><o:p></o:p></span></p>
                          <p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
                          <div>
                            <p class="MsoNormal"><span
                                style="color:black">Hi Les,<o:p></o:p></span></p>
                            <div>
                              <p class="MsoNormal"><span
                                  style="color:black">I believe that IGP
                                  extensions to advertise RTM capability
                                  are required.<o:p></o:p></span></p>
                            </div>
                            <div>
                              <p class="MsoNormal"><span
                                  style="color:black"> <o:p></o:p></span></p>
                            </div>
                            <div>
                              <p class="MsoNormal"><span
                                  style="color:black">Regards,<o:p></o:p></span></p>
                            </div>
                            <div>
                              <p class="MsoNormal"><span
                                  style="color:black">Greg<o:p></o:p></span></p>
                            </div>
                          </div>
                          <div>
                            <p class="MsoNormal"><span
                                style="color:black"> <o:p></o:p></span></p>
                            <div>
                              <p class="MsoNormal"><span
                                  style="color:black">On Thu, Jan 19,
                                  2017 at 7:57 AM, Les Ginsberg
                                  (ginsberg) &lt;<a
                                    moz-do-not-send="true"
                                    href="mailto:ginsberg@cisco.com"
                                    target="_blank">ginsberg@cisco.com</a>&gt;
                                  wrote:<o:p></o:p></span></p>
                              <blockquote
                                style="border:none;border-left:solid
                                #CCCCCC 1.0pt;padding:0in 0in 0in
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
                                <div>
                                  <div>
                                    <p class="MsoNormal"
                                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Greg
                                        –</span><span
                                        style="color:black"><o:p></o:p></span></p>
                                    <p class="MsoNormal"
                                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><span
                                        style="color:black"><o:p></o:p></span></p>
                                    <p class="MsoNormal"
                                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">I
                                        am having trouble understanding
                                        your response.</span><span
                                        style="color:black"><o:p></o:p></span></p>
                                    <p class="MsoNormal"
                                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">The
                                        question we are raising is
                                        whether we should extend the
                                        IGPs to support advertising RTM
                                        capability – an alternative
                                        being to retrieve the capability
                                        via network management.</span><span
                                        style="color:black"><o:p></o:p></span></p>
                                    <p class="MsoNormal"
                                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><span
                                        style="color:black"><o:p></o:p></span></p>
                                    <p class="MsoNormal"
                                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Saying
                                        that the IGP functionality is
                                        optional and/or wouldn’t always
                                        be advertised doesn’t really
                                        answer the question of whether
                                        we should or should not define
                                        the IGP extensions.</span><span
                                        style="color:black"><o:p></o:p></span></p>
                                    <p class="MsoNormal"
                                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><span
                                        style="color:black"><o:p></o:p></span></p>
                                    <p class="MsoNormal"
                                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Could
                                        you respond more directly to
                                        this point?</span><span
                                        style="color:black"><o:p></o:p></span></p>
                                    <p class="MsoNormal"
                                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><span
                                        style="color:black"><o:p></o:p></span></p>
                                    <p class="MsoNormal"
                                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">  
                                        Les</span><span
                                        style="color:black"><o:p></o:p></span></p>
                                    <p class="MsoNormal"
                                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><span
                                        style="color:black"><o:p></o:p></span></p>
                                    <p class="MsoNormal"
                                      style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><span
                                        style="color:black"><o:p></o:p></span></p>
                                    <div
                                      style="border:none;border-left:solid
                                      blue 1.5pt;padding:0in 0in 0in
                                      4.0pt">
                                      <div>
                                        <div
                                          style="border:none;border-top:solid
                                          #B5C4DF 1.0pt;padding:3.0pt
                                          0in 0in 0in">
                                          <p class="MsoNormal"
                                            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">From:</span></b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">
                                              Greg Mirsky [mailto:<a
                                                moz-do-not-send="true"
                                                href="mailto:gregimirsky@gmail.com"
                                                target="_blank">gregimirsky@gmail.com</a>]
                                              <br>
                                              <b>Sent:</b> Thursday,
                                              January 19, 2017 7:44 AM<br>
                                              <b>To:</b> Acee Lindem
                                              (acee)<br>
                                              <b>Cc:</b> Robert Sparks;
                                              <a moz-do-not-send="true"
href="mailto:mpls@ietf.org" target="_blank">mpls@ietf.org</a>;
                                              <a moz-do-not-send="true"
href="mailto:gen-art@ietf.org" target="_blank">gen-art@ietf.org</a>; <a
                                                moz-do-not-send="true"
                                                href="mailto:draft-ietf-mpls-residence-time.all@ietf.org"
                                                target="_blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a
                                                moz-do-not-send="true"
                                                href="mailto:ietf@ietf.org"
                                                target="_blank">
                                                ietf@ietf.org</a>; Les
                                              Ginsberg (ginsberg); <a
                                                moz-do-not-send="true"
                                                href="mailto:isis-chairs@ietf.org"
                                                target="_blank">
                                                isis-chairs@ietf.org</a>;
                                              Abhay Roy (akr)</span><span
                                              style="color:black"><o:p></o:p></span></p>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"><span
                                                  style="color:black"><br>
                                                  <b>Subject:</b> Re:
                                                  [mpls] Review of
                                                  draft-ietf-mpls-residence-time-12<o:p></o:p></span></p>
                                            </div>
                                          </div>
                                        </div>
                                      </div>
                                      <div>
                                        <div>
                                          <p class="MsoNormal"
                                            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                              style="color:black"> <o:p></o:p></span></p>
                                          <div>
                                            <p class="MsoNormal"
                                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                style="color:black">Hi
                                                Acee,<o:p></o:p></span></p>
                                            <div>
                                              <p class="MsoNormal"
                                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                  style="color:black">the
                                                  draft defines optional
                                                  functionality. If an
                                                  operator has no use
                                                  neither for PTP's
                                                  Transparent Clock, nor
                                                  RTM itself as
                                                  performance metric,
                                                  then RTM sub-TLV would
                                                  not be included and
                                                  thus it would not be
                                                  flooded. Of course, it
                                                  be right to reflect
                                                  RTM capability through
                                                  YANG data model, thus
                                                  allowing SDN scenario
                                                  you've described.<o:p></o:p></span></p>
                                            </div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                  style="color:black"> <o:p></o:p></span></p>
                                            </div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                  style="color:black">Regards,<o:p></o:p></span></p>
                                            </div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                  style="color:black">Greg<o:p></o:p></span></p>
                                            </div>
                                          </div>
                                          <div>
                                            <p class="MsoNormal"
                                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                style="color:black"> <o:p></o:p></span></p>
                                            <div>
                                              <p class="MsoNormal"
                                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                  style="color:black">On
                                                  Wed, Jan 18, 2017 at
                                                  2:51 PM, Acee Lindem
                                                  (acee) &lt;<a
                                                    moz-do-not-send="true"
href="mailto:acee@cisco.com" target="_blank">acee@cisco.com</a>&gt;
                                                  wrote:<o:p></o:p></span></p>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Hi
                                                      Greg, </span><span
style="color:black"><o:p></o:p></span></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Although
                                                      it is a bit late,
                                                      we’ve had some
                                                      discussions
                                                      amongst the IS-IS
                                                      and OSPF chairs
                                                      and are wondering
                                                      whether the
                                                      interface
                                                      capability belongs
                                                      in the IGPs. This
                                                      will be flooded
                                                      throughout the
                                                      entire routing
                                                      domain – is it
                                                      really needed on
                                                      every node or will
                                                      it the RTM testing
                                                      be initiated from
                                                      an omniscient NMS
                                                      client that would
                                                      know the
                                                      capabilities of
                                                      each node or
                                                      easily query them
                                                      using YANG? </span><span
style="color:black"><o:p></o:p></span></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Thanks,</span><span
style="color:black"><o:p></o:p></span></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Acee
                                                       </span><span
                                                      style="color:black"><o:p></o:p></span></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                </div>
                                                <div
                                                  style="border:none;border-top:solid
                                                  #B5C4DF
                                                  1.0pt;padding:3.0pt
                                                  0in 0in 0in">
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">From:
                                                      </span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">mpls
                                                      &lt;<a
                                                        moz-do-not-send="true"
href="mailto:mpls-bounces@ietf.org" target="_blank">mpls-bounces@ietf.org</a>&gt;
                                                      on behalf of Greg
                                                      Mirsky &lt;<a
                                                        moz-do-not-send="true"
href="mailto:gregimirsky@gmail.com" target="_blank">gregimirsky@gmail.com</a>&gt;<br>
                                                      <b>Date: </b>Wednesday,
                                                      January 18, 2017
                                                      at 1:25 PM<br>
                                                      <b>To: </b>Robert
                                                      Sparks &lt;<a
                                                        moz-do-not-send="true"
href="mailto:rjsparks@nostrum.com" target="_blank">rjsparks@nostrum.com</a>&gt;<br>
                                                      <b>Cc: </b>"<a
                                                        moz-do-not-send="true"
href="mailto:mpls@ietf.org" target="_blank">mpls@ietf.org</a>" &lt;<a
                                                        moz-do-not-send="true"
href="mailto:mpls@ietf.org" target="_blank">mpls@ietf.org</a>&gt;, "<a
                                                        moz-do-not-send="true"
href="mailto:gen-art@ietf.org" target="_blank">gen-art@ietf.org</a>"
                                                      &lt;<a
                                                        moz-do-not-send="true"
href="mailto:gen-art@ietf.org" target="_blank">gen-art@ietf.org</a>&gt;,
                                                      "<a
                                                        moz-do-not-send="true"
href="mailto:draft-ietf-mpls-residence-time.all@ietf.org"
                                                        target="_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>"
                                                      &lt;<a
                                                        moz-do-not-send="true"
href="mailto:draft-ietf-mpls-residence-time.all@ietf.org"
                                                        target="_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;,
                                                      "<a
                                                        moz-do-not-send="true"
href="mailto:ietf@ietf.org" target="_blank">ietf@ietf.org</a>" &lt;<a
                                                        moz-do-not-send="true"
href="mailto:ietf@ietf.org" target="_blank">ietf@ietf.org</a>&gt;<br>
                                                      <b>Subject: </b>Re:
                                                      [mpls] Review of
                                                      draft-ietf-mpls-residence-time-12</span><span
style="color:black"><o:p></o:p></span></p>
                                                </div>
                                                <div>
                                                  <div>
                                                    <div>
                                                      <p
                                                        class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                    </div>
                                                    <blockquote
                                                      style="border:none;border-left:solid
                                                      #B5C4DF
                                                      4.5pt;padding:0in
                                                      0in 0in
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt"
id="m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
                                                      <div>
                                                        <div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Hi
                                                          Robert,
                                                          </span><span
                                                          style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">thank
                                                          you for the
                                                          most expedient
                                                          review and
                                                          comments. I'll
                                                          make changes
                                                          in Section 2
                                                          per your
                                                          suggestion.</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Regards,</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Greg</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">On
                                                          Wed, Jan 18,
                                                          2017 at 10:34
                                                          AM, Robert
                                                          Sparks &lt;<a
moz-do-not-send="true" href="mailto:rjsparks@nostrum.com"
                                                          target="_blank">rjsparks@nostrum.com</a>&gt;
                                                          wrote:</span><span
style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">The
                                                          changes all
                                                          look good.</span><span
style="color:black"><o:p></o:p></span></p>
                                                          <p><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">I
                                                          still think
                                                          you should say
                                                          something in
                                                          the document
                                                          about what
                                                          "the time of
                                                          packet
                                                          arrival" and
                                                          "transmission"
                                                          means, and
                                                          call out the
                                                          point you made
                                                          about being
                                                          careful to not
                                                          introduce
                                                          apparent
                                                          jitter by not
                                                          making those
                                                          measurements
                                                          consistently.
                                                          (The
                                                          definitions
                                                          you point to
                                                          in your
                                                          earlier mail
                                                          from G.8013
                                                          don't really
                                                          help - they
                                                          just say "time
                                                          of packet
                                                          arrival".
                                                          Again, the
                                                          first and last
                                                          bit are likely
                                                          to be several
                                                          nanoseconds
                                                          apart so I
                                                          think it
                                                          matters.
                                                          Perhaps you're
                                                          saying it
                                                          doesn't matter
                                                          as long as
                                                          each node is
                                                          consistent
                                                          (there will be
                                                          error in the
                                                          residence time
                                                          measurement,
                                                          but it will be
                                                          constant at
                                                          each node, so
                                                          the sum of
                                                          errors will be
                                                          constant, and
                                                          the clocks
                                                          will be ok?)</span><span
style="color:black"><o:p></o:p></span></p>
                                                          <p><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Please
                                                          look at the
                                                          new first
                                                          paragraph of
                                                          section 2 -
                                                          there's a mix
                                                          of "as case"
                                                          and "in case"
                                                          that should be
                                                          made
                                                          consistent. I
                                                          suspect it
                                                          would be
                                                          easiest to
                                                          simply say
                                                          "referred to
                                                          as using a
                                                          one-step
                                                          clock" and
                                                          "referred to
                                                          as using a
                                                          two-step
                                                          clock" or
                                                          similar.</span><span
style="color:black"><o:p></o:p></span></p>
                                                          <p><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">RjS</span><span
style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">On
                                                          1/18/17 12:03
                                                          PM, Greg
                                                          Mirsky wrote:</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <blockquote
                                                          style="margin-top:5.0pt;margin-bottom:5.0pt">
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Hi
                                                          Robert,
                                                          </span><span
                                                          style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Sasha
                                                          Vainshtein
                                                          came with
                                                          elegant idea
                                                          to address
                                                          disconnection
                                                          between
                                                          discussion of
                                                          one-step and
                                                          two-step modes
                                                          that you've
                                                          pointed out.
                                                          We've moved
                                                          Section 7 as
                                                          sub-section
                                                          into Section 2
                                                          now. Attached
                                                          are updated
                                                          diff and the
                                                          proposed new
                                                          version -13.</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Regards,</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Greg</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">On
                                                          Wed, Jan 18,
                                                          2017 at 8:13
                                                          AM, Greg
                                                          Mirsky &lt;<a
moz-do-not-send="true" href="mailto:gregimirsky@gmail.com"
                                                          target="_blank">gregimirsky@gmail.com</a>&gt;
                                                          wrote:</span><span
style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Hi
                                                          Robert,
                                                          </span><span
                                                          style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">once
                                                          again, thank
                                                          you for your
                                                          thorough
                                                          review and the
                                                          most detailed
                                                          comments. I've
                                                          prepared
                                                          updated
                                                          version and
                                                          would greatly
                                                          appreciate if
                                                          you review the
                                                          changes and
                                                          let us know
                                                          whether your
                                                          comments been
                                                          addressed.
                                                          Attached are
                                                          diff and the
                                                          new version.</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Regards,</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Greg</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">On
                                                          Wed, Jan 11,
                                                          2017 at 7:48
                                                          AM, Robert
                                                          Sparks &lt;<a
moz-do-not-send="true" href="mailto:rjsparks@nostrum.com"
                                                          target="_blank">rjsparks@nostrum.com</a>&gt;
                                                          wrote:</span><span
style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <div>
                                                          <blockquote
                                                          style="border:none;border-left:solid
                                                          #CCCCCC
                                                          1.0pt;padding:0in
                                                          0in 0in
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Reviewer:
                                                          Robert Sparks<br>
                                                          Review result:
                                                          Ready with
                                                          Nits<br>
                                                          <br>
                                                          I am the
                                                          assigned
                                                          Gen-ART
                                                          reviewer for
                                                          this draft.
                                                          The General
                                                          Area<br>
                                                          Review Team
                                                          (Gen-ART)
                                                          reviews all
                                                          IETF documents
                                                          being
                                                          processed<br>
                                                          by the IESG
                                                          for the IETF
                                                          Chair.  Please
                                                          treat these
                                                          comments just<br>
                                                          like any other
                                                          last call
                                                          comments.<br>
                                                          <br>
                                                          For more
                                                          information,
                                                          please see the
                                                          FAQ at<br>
                                                          &lt;<a
                                                          moz-do-not-send="true"
href="https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target="_blank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
                                                          <br>
                                                          Document:
                                                          draft-ietf-mpls-residence-time-12<br>
                                                          Reviewer:
                                                          Robert Sparks<br>
                                                          Review Date:
                                                          2017-01-10<br>
                                                          IETF LC End
                                                          Date:
                                                          2017-01-17<br>
                                                          IESG Telechat
                                                          date:
                                                          2017-02-02<br>
                                                          <br>
                                                          Summary: Ready
                                                          (with nits)
                                                          for
                                                          publication as
                                                          a Proposed
                                                          Standard<br>
                                                          <br>
                                                          I have two
                                                          primary
                                                          comments. I
                                                          expect both
                                                          are rooted in
                                                          the authors<br>
                                                          and working
                                                          group knowing
                                                          what the
                                                          document means
                                                          instead of
                                                          seeing<br>
                                                          what<br>
                                                          it says or
                                                          doesn't say:<br>
                                                          <br>
                                                          1) The
                                                          document is
                                                          loose with its
                                                          use of
                                                          'packet', and
                                                          where TTLs<br>
                                                          appear when<br>
                                                          they are
                                                          discussed. It
                                                          might be
                                                          helpful to
                                                          rephrase the
                                                          text that<br>
                                                          speaks<br>
                                                          of RTM packets
                                                          in terms of
                                                          RTM messages
                                                          that are
                                                          encoded as
                                                          G-ACh<br>
                                                          messages and<br>
                                                          not refer to
                                                          packets unless
                                                          you mean the
                                                          whole
                                                          encapsulated
                                                          packet<br>
                                                          with MPLS<br>
                                                          header, ACH,
                                                          and G-ACh
                                                          message.<br>
                                                          <br>
                                                          2) Since this
                                                          new mechanic
                                                          speaks in
                                                          terms of
                                                          fractional
                                                          nanoseconds,<br>
                                                          some<br>
                                                          discussion of
                                                          what
                                                          trigger-point
                                                          you intend
                                                          people to use
                                                          for taking<br>
                                                          the<br>
                                                          precise time
                                                          of a packet's
                                                          arrival or
                                                          departure
                                                          seems
                                                          warranted.
                                                          (The<br>
                                                          first and<br>
                                                          last bit of
                                                          the whole
                                                          encapsulated
                                                          packet above
                                                          are going to
                                                          appear at<br>
                                                          the<br>
                                                          physical layer
                                                          many
                                                          nanoseconds
                                                          apart at OC192
                                                          speeds if I've
                                                          done the<br>
                                                          math<br>
                                                          right). It may
                                                          be obvious to
                                                          the folks
                                                          discussing
                                                          this, but it's
                                                          not<br>
                                                          obvious<br>
                                                          from the
                                                          document.  If
                                                          it's _not_
                                                          obvious and
                                                          variation in
                                                          technique<br>
                                                          is<br>
                                                          expected, then
                                                          some
                                                          discussion
                                                          about issues
                                                          that might
                                                          arise from<br>
                                                          different<br>
                                                          implementation
                                                          choices would
                                                          be welcome.<br>
                                                          <br>
                                                          The rest of
                                                          these are
                                                          editorial
                                                          nits:<br>
                                                          <br>
                                                          It would help
                                                          to pull an
                                                          overview
                                                          description of
                                                          the difference<br>
                                                          between<br>
                                                          one-step and
                                                          two-step much
                                                          earlier in the
                                                          document. I
                                                          suggest in the<br>
                                                          overview<br>
                                                          in section 2.
                                                          Otherwise, the
                                                          reader really
                                                          has to jump
                                                          forward and<br>
                                                          read section<br>
                                                          7 before
                                                          section 3's
                                                          5th bullet
                                                          makes any
                                                          sense.<br>
                                                          <br>
                                                          In section 3,
                                                          "IANA will be
                                                          asked" should
                                                          be made
                                                          active. Say
                                                          "This<br>
                                                          document<br>
                                                          asks IANA to"
                                                          and point to
                                                          the IANA
                                                          consideration
                                                          section. Apply<br>
                                                          similar<br>
                                                          treatment to
                                                          the other
                                                          places where
                                                          you talk about
                                                          future IANA<br>
                                                          actions.<br>
                                                          <br>
                                                          There are
                                                          several places
                                                          where there
                                                          are missing
                                                          words
                                                          (typically<br>
                                                          articles or<br>
                                                          prepositions).
                                                          You're less
                                                          likely to end
                                                          up with
                                                          misinterpretations<br>
                                                          during the<br>
                                                          RFC Editor
                                                          phase if you
                                                          provide them
                                                          before the
                                                          document gets
                                                          that far<br>
                                                          in the<br>
                                                          process. The
                                                          spots I found
                                                          most
                                                          disruptive
                                                          were these
                                                          (this is not<br>
                                                          intended to<br>
                                                          be
                                                          exhaustive):<br>
                                                          <br>
                                                            Section 3:
                                                          "set 1
                                                          according"
                                                          -&gt; "set to
                                                          1 according"<br>
                                                            Section 3:
                                                          "the Table 19
                                                          [IEEE..."
                                                          -&gt; "Table
                                                          19 of
                                                          [IEEE..."<br>
                                                            Section 4.2:
                                                          "Detailed
                                                          discussion of
                                                          ... modes in
                                                          Section 7."<br>
                                                                       
                                                                   
                                                          -&gt;
                                                          "Detailed
                                                          discussion of
                                                          ... modes
                                                          appears<br>
                                                          in Section 7."<br>
                                                            Section 10:
                                                          "most of"
                                                          -&gt; "most of
                                                          all"<br>
                                                          <br>
                                                          In Setion 3.1
                                                          at "identity
                                                          of the source
                                                          port", please
                                                          point into the<br>
                                                          document<br>
                                                          that defines
                                                          this identity
                                                          and its
                                                          representation.
                                                          I suspect this
                                                          is a<br>
                                                          pointer<br>
                                                          into a
                                                          specific
                                                          section in
                                                          IEEE.1588.2008].<br>
                                                          <br>
                                                          </span><span
                                                          style="color:black"><o:p></o:p></span></p>
                                                          </blockquote>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          </blockquote>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                        </div>
                                                      </div>
                                                    </blockquote>
                                                  </div>
                                                </div>
                                              </div>
                                            </div>
                                            <p class="MsoNormal"
                                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                style="color:black"> <o:p></o:p></span></p>
                                          </div>
                                        </div>
                                      </div>
                                    </div>
                                  </div>
                                </div>
                              </blockquote>
                            </div>
                            <p class="MsoNormal"><span
                                style="color:black"> <o:p></o:p></span></p>
                          </div>
                        </div>
                      </div>
                    </blockquote>
                  </div>
                </div>
              </div>
            </blockquote>
          </div>
        </div>
      </div>
    </blockquote>
    <br>
  </body>
</html>

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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Stewart Bryant <stewart.bryant@gmail.com>, Uma Chunduri <uma.chunduri@huawei.com>, "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, John E Drake <jdrake@juniper.net>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Date: Fri, 20 Jan 2017 01:46:46 +0000
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References: <148414970343.8167.4538946698521330202.idtracker@ietfa.amsl.com> <CA+RyBmU9W5QP4EjbPezoCpdLHv1RJCrzJvxQmeTnAvjO_6vbJA@mail.gmail.com> <CA+RyBmVrvyiwDp2kV3VLiQtqOaL=MaVjZugGbvgWnp6y3dwP3Q@mail.gmail.com> <95d41b52-5c85-869f-2139-6713816e9637@nostrum.com> <CA+RyBmWcvU70BZYRj8ZHUZrmkcwq1eHS38jFpyZOq3A_5eXZ9g@mail.gmail.com> <D4A55AE0.9483E%acee@cisco.com> <CA+RyBmWrDhZUmVN0t8aLsL6F3ZfnvBu8FW_2VjDmwj-ercLd5w@mail.gmail.com> <f315026a140148898250f8fa3bdb0123@XCH-ALN-001.cisco.com> <CA+RyBmWMBAXd+zntuAeOU9x7xs9BQSk7J-z9+yyUDvKPd3v2MA@mail.gmail.com> <HE1PR0301MB22660A73C0D5A96BA8F3F0D39D7E0@HE1PR0301MB2266.eurprd03.prod.outlook.com> <D4A65103.94DF0%acee@cisco.com> <DM5PR05MB3001952D0DDD2AA672697094C77E0@DM5PR05MB3001.namprd05.prod.outlook.com> <D4A6573B.94E53%acee@cisco.com> <DM5PR05MB3001ED6AF8296F5DBE5E38EFC77E0@DM5PR05MB3001.namprd05.prod.outlook.com> <3f43cfdfe76e437bb2df6159e5644ae5@XCH-ALN-001.cisco.com> <25B4902B1192E84696414485F57268540187782A@dfweml501-mbb> <cf16c88b-1a3b-2637-7605-5a9472dda55f@gmail.com>
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Hi Stewart,

So you are saying in this use case some element would create a path compose=
d solely of nodes supporting RTM?

Thanks,
Acee

From: Stewart Bryant <stewart.bryant@gmail.com<mailto:stewart.bryant@gmail.=
com>>
Date: Thursday, January 19, 2017 at 5:04 PM
To: Uma Chunduri <uma.chunduri@huawei.com<mailto:uma.chunduri@huawei.com>>,=
 "Les Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>,=
 John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>, Acee Lindem =
<acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshtein <Alexander.Va=
inshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>, Greg Mirsky=
 <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>, "mpls@ietf.org=
<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "isis-chairs=
@ietf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-c=
hairs@ietf.org>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf=
.org<mailto:gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.or=
g<mailto:draft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-res=
idence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org=
>>, Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "iet=
f@ietf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12


Well one scenario is that you would use SR to create the synchronization pa=
th, in which case you would need it to be in the IGP and flooded.

Stewart

On 19/01/2017 19:40, Uma Chunduri wrote:
I support advertising this in IGP.


>This is clearly not TE information =96..
>I do not see the IGPs as the appropriate mechanism to flood generic interf=
ace capabilities

We have instances where both the above are not met and we flooded informati=
on.
https://tools.ietf.org/html/rfc7883 (Les, you co-authored the same!!)
https://tools.ietf.org/html/rfc7880

--
Uma C.

From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Les Ginsberg (ginsbe=
rg)
Sent: Thursday, January 19, 2017 9:25 AM
To: John E Drake <jdrake@juniper.net><mailto:jdrake@juniper.net>; Acee Lind=
em (acee) <acee@cisco.com><mailto:acee@cisco.com>; Alexander Vainshtein <Al=
exander.Vainshtein@ecitele.com><mailto:Alexander.Vainshtein@ecitele.com>; G=
reg Mirsky <gregimirsky@gmail.com><mailto:gregimirsky@gmail.com>
Cc: Abhay Roy (akr) <akr@cisco.com><mailto:akr@cisco.com>; mpls@ietf.org<ma=
ilto:mpls@ietf.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; gen=
-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@=
ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>; Robert Sparks=
 <rjsparks@nostrum.com><mailto:rjsparks@nostrum.com>; ietf@ietf.org<mailto:=
ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

John =96

For me, this raises the age-old question of when it is/is not appropriate t=
o use IGPs for flooding information.

This is clearly not TE information =96 you just happen to be using this in =
conjunction with MPLS =96 but it is a generic capability. I do not see the =
IGPs as the appropriate mechanism to flood generic interface capabilities. =
It also, as Acee has pointed out, results in flooding information to all no=
des in the domain when only a few care about it.

   Les

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 8:54 AM
To: Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg (gi=
nsberg)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node=92s RTM capab=
ilities and distribute them to the other nodes is undefined.  Further, one =
of the ways by which an omniscient controller learns a node=92s capabilitie=
s is by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander=
 Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@e=
citele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.c=
om>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com=
>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I=92m sorry but I focused mainly on the OSPF protocol aspects then and didn=
=92t question the use case. This question came up in the IS-IS WG discussio=
ns.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg =96

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability =96 an alternative being to retrieve the capabi=
lity via network management.

Saying that the IGP functionality is optional and/or wouldn=92t always be a=
dvertised doesn=92t really answer the question of whether we should or shou=
ld not define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we=92ve had some discussions amongst the IS-IS a=
nd OSPF chairs and are wondering whether the interface capability belongs i=
n the IGPs. This will be flooded throughout the entire routing domain =96 i=
s it really needed on every node or will it the RTM testing be initiated fr=
om an omniscient NMS client that would know the capabilities of each node o=
r easily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].









--_000_D4A6D5DC9550Caceeciscocom_
Content-Type: text/html; charset="Windows-1252"
Content-ID: <46412E4CB0875E49BAB2877953EB8A56@emea.cisco.com>
Content-Transfer-Encoding: quoted-printable

<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div>Hi Stewart,</div>
<div><br>
</div>
<div>So you are saying in this use case some element would create a path co=
mposed solely of nodes supporting RTM?&nbsp;</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Acee</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>Stewart Bryant &lt;<a href=3D=
"mailto:stewart.bryant@gmail.com">stewart.bryant@gmail.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Thursday, January 19, 2017 at=
 5:04 PM<br>
<span style=3D"font-weight:bold">To: </span>Uma Chunduri &lt;<a href=3D"mai=
lto:uma.chunduri@huawei.com">uma.chunduri@huawei.com</a>&gt;, &quot;Les Gin=
sberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@c=
isco.com</a>&gt;, John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jd=
rake@juniper.net</a>&gt;,
 Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com</a>&gt;, =
Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@ecitele.com=
">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a href=3D"mail=
to:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;<br>
<span style=3D"font-weight:bold">Cc: </span>&quot;Abhay Roy (akr)&quot; &lt=
;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;, &quot;<a href=3D"m=
ailto:mpls@ietf.org">mpls@ietf.org</a>&quot; &lt;<a href=3D"mailto:mpls@iet=
f.org">mpls@ietf.org</a>&gt;, &quot;<a href=3D"mailto:isis-chairs@ietf.org"=
>isis-chairs@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, =
&quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<a=
 href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-i=
etf-mpls-residence-time.all@ietf.org</a>&gt;, Robert Sparks &lt;<a href=3D"=
mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;, &quot;<a href=3D=
"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=3D"mailto:ietf@i=
etf.org">ietf@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [mpls] Review of draft=
-ietf-mpls-residence-time-12<br>
</div>
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div bgcolor=3D"#FFFFFF" text=3D"#000000">
<p>Well one scenario is that you would use SR to create the synchronization=
 path, in which case you would need it to be in the IGP and flooded.</p>
<p>Stewart<br>
</p>
<br>
<div class=3D"moz-cite-prefix">On 19/01/2017 19:40, Uma Chunduri wrote:<br>
</div>
<blockquote cite=3D"mid:25B4902B1192E84696414485F57268540187782A@dfweml501-=
mbb" type=3D"cite">
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><a moz-do-not-send=3D"true" name=3D"_MailEndCompose"=
><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif=
;color:#1F497D">I support advertising this in IGP.<o:p></o:p></span></a></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&gt;</span><span style=3D"font-size:1=
1.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">This is cle=
arly not TE information =96..<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&gt;I do not see the IGPs as the appr=
opriate mechanism to flood generic interface capabilities<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We have instances where both the abov=
e are not met and we flooded information.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><a moz-do-not-send=3D"true" href=3D"https://tools.ie=
tf.org/html/rfc7883"><span style=3D"font-size:11.0pt;font-family:&quot;Cali=
bri&quot;,sans-serif">https://tools.ietf.org/html/rfc7883</span></a><span s=
tyle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#=
1F497D">
 (Les, you co-authored the same!!)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><a moz-do-not-send=3D"true" href=3D"https://tools.ie=
tf.org/html/rfc7880"><span style=3D"font-size:11.0pt;font-family:&quot;Cali=
bri&quot;,sans-serif">https://tools.ietf.org/html/rfc7880</span></a><span s=
tyle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#=
1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">--</span><span style=3D"font-size:11.=
0pt;font-family:&quot;Freestyle
              Script&quot;;color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Uma C.</span><span style=3D"font-size=
:11.0pt;font-family:&quot;Brush Script
              MT&quot;;color:#1F497D"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1
            1.0pt;padding:3.0pt 0in 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> mpls [<a class=3D"moz-txt-link=
-freetext" href=3D"mailto:mpls-bounces@ietf.org">mailto:mpls-bounces@ietf.o=
rg</a>]
<b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
<b>Sent:</b> Thursday, January 19, 2017 9:25 AM<br>
<b>To:</b> John E Drake <a class=3D"moz-txt-link-rfc2396E" href=3D"mailto:j=
drake@juniper.net">
&lt;jdrake@juniper.net&gt;</a>; Acee Lindem (acee) <a class=3D"moz-txt-link=
-rfc2396E" href=3D"mailto:acee@cisco.com">
&lt;acee@cisco.com&gt;</a>; Alexander Vainshtein <a class=3D"moz-txt-link-r=
fc2396E" href=3D"mailto:Alexander.Vainshtein@ecitele.com">
&lt;Alexander.Vainshtein@ecitele.com&gt;</a>; Greg Mirsky <a class=3D"moz-t=
xt-link-rfc2396E" href=3D"mailto:gregimirsky@gmail.com">
&lt;gregimirsky@gmail.com&gt;</a><br>
<b>Cc:</b> Abhay Roy (akr) <a class=3D"moz-txt-link-rfc2396E" href=3D"mailt=
o:akr@cisco.com">
&lt;akr@cisco.com&gt;</a>; <a class=3D"moz-txt-link-abbreviated" href=3D"ma=
ilto:mpls@ietf.org">
mpls@ietf.org</a>; <a class=3D"moz-txt-link-abbreviated" href=3D"mailto:isi=
s-chairs@ietf.org">
isis-chairs@ietf.org</a>; <a class=3D"moz-txt-link-abbreviated" href=3D"mai=
lto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a class=3D"moz-txt-link-abbreviated" href=3D"mailto:=
draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; Robert Sparks <a class=3D"=
moz-txt-link-rfc2396E" href=3D"mailto:rjsparks@nostrum.com">
&lt;rjsparks@nostrum.com&gt;</a>; <a class=3D"moz-txt-link-abbreviated" hre=
f=3D"mailto:ietf@ietf.org">
ietf@ietf.org</a><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John =96<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">For me, this raises the age-old quest=
ion of when it is/is not appropriate to use IGPs for flooding information.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">This is clearly not TE information =
=96 you just happen to be using this in conjunction with MPLS =96 but it is=
 a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in
          0in 0in 4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF
              1.0pt;padding:3.0pt 0in 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> John E Drake [<a moz-do-not-send=
=3D"true" href=3D"mailto:jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; <a moz-do-not-send=3D"true" href=3D"mailto:mpls@i=
etf.org">mpls@ietf.org</a>;
<a moz-do-not-send=3D"true" href=3D"mailto:gen-art@ietf.org">gen-art@ietf.o=
rg</a>; <a moz-do-not-send=3D"true" href=3D"mailto:draft-ietf-mpls-residenc=
e-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a moz-do-not-send=3D"true=
" href=3D"mailto:ietf@ietf.org">
ietf@ietf.org</a>; <a moz-do-not-send=3D"true" href=3D"mailto:isis-chairs@i=
etf.org">isis-chairs@ietf.org</a>; Abhay Roy (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Relying on an omniscient controller i=
s a non-starter in general and in particular because the protocol by which =
it would learn each node=92s RTM capabilities and
 distribute them to the other nodes is undefined.&nbsp; Further, one of the=
 ways by which an omniscient controller learns a node=92s capabilities is b=
y snooping the link/state database.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue
            1.5pt;padding:0in 0in 0in 4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1
                1.0pt;padding:3.0pt 0in 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Acee Lindem (acee) [<a moz-do-=
not-send=3D"true" href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;<a moz-do-not-send=3D"true" href=3D"mailto:jdra=
ke@juniper.net">jdrake@juniper.net</a>&gt;; Alexander Vainshtein &lt;<a moz=
-do-not-send=3D"true" href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alex=
ander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a moz-do-not-send=3D=
"true" href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
 Les Ginsberg (ginsberg) &lt;<a moz-do-not-send=3D"true" href=3D"mailto:gin=
sberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a moz-do-not-send=3D"true" href=3D"mailto:rjs=
parks@nostrum.com">rjsparks@nostrum.com</a>&gt;;
<a moz-do-not-send=3D"true" href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>=
; <a moz-do-not-send=3D"true" href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a moz-do-not-send=3D"true" href=3D"mailto:draft-ietf=
-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a moz-do-not-send=3D"true=
" href=3D"mailto:ietf@ietf.org">
ietf@ietf.org</a>; <a moz-do-not-send=3D"true" href=3D"mailto:isis-chairs@i=
etf.org">isis-chairs@ietf.org</a>; Abhay Roy (akr) &lt;<a moz-do-not-send=
=3D"true" href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi John,&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF
              1.0pt;padding:3.0pt 0in 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">John E Drake &lt;<a moz-do-not-send=3D"true" href=
=3D"mailto:jdrake@juniper.net">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a moz-do-not-send=3D"true" href=3D"mailto:acee@=
cisco.com">acee@cisco.com</a>&gt;, Alexander Vainshtein &lt;<a moz-do-not-s=
end=3D"true" href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vai=
nshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a moz-do-not-send=3D"true" hr=
ef=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a moz-do-not-send=3D"true" href=
=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a moz-do-not-send=3D"true" href=3D"mailto:rjs=
parks@nostrum.com">rjsparks@nostrum.com</a>&gt;, &quot;<a moz-do-not-send=
=3D"true" href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&quot; &lt;<a moz-=
do-not-send=3D"true" href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a moz-do-not-send=3D"true" href=3D"mailto:gen-art@ietf.org">gen-art=
@ietf.org</a>&quot; &lt;<a moz-do-not-send=3D"true" href=3D"mailto:gen-art@=
ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a moz-do-not-send=3D"true" href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot;
 &lt;<a moz-do-not-send=3D"true" href=3D"mailto:draft-ietf-mpls-residence-t=
ime.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quo=
t;<a moz-do-not-send=3D"true" href=3D"mailto:ietf@ietf.org">ietf@ietf.org</=
a>&quot; &lt;<a moz-do-not-send=3D"true" href=3D"mailto:ietf@ietf.org">ietf=
@ietf.org</a>&gt;,
 &quot;<a moz-do-not-send=3D"true" href=3D"mailto:isis-chairs@ietf.org">isi=
s-chairs@ietf.org</a>&quot; &lt;<a moz-do-not-send=3D"true" href=3D"mailto:=
isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&q=
uot; &lt;<a moz-do-not-send=3D"true" href=3D"mailto:akr@cisco.com">akr@cisc=
o.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF
              4.5pt;padding:0in 0in 0in
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.=
0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We discussed all of this with you ove=
r a year ago and used your guidance in adding the indication of RTM capabil=
ity to OSPF.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I=92m sorry but I focused mainly on the=
 OSPF protocol aspects then and didn=92t question the use case. This questi=
on came up in the IS-IS WG discussions.&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF
              4.5pt;padding:0in 0in 0in
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.=
0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue
                    1.5pt;padding:0in 0in 0in 4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1
                        1.0pt;padding:3.0pt 0in 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Acee L=
indem (acee) [<a moz-do-not-send=3D"true" href=3D"mailto:acee@cisco.com">ma=
ilto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a moz-do-not-send=3D"true" href=3D"mai=
lto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&=
gt;; Greg Mirsky &lt;<a moz-do-not-send=3D"true" href=3D"mailto:gregimirsky=
@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Ginsberg
 (ginsberg) &lt;<a moz-do-not-send=3D"true" href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a moz-do-not-send=3D"true" href=3D"mailto:rjs=
parks@nostrum.com">rjsparks@nostrum.com</a>&gt;;
<a moz-do-not-send=3D"true" href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>=
; <a moz-do-not-send=3D"true" href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a moz-do-not-send=3D"true" href=3D"mailto:draft-ietf=
-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a moz-do-not-send=3D"true=
" href=3D"mailto:ietf@ietf.org">
ietf@ietf.org</a>; <a moz-do-not-send=3D"true" href=3D"mailto:isis-chairs@i=
etf.org">isis-chairs@ietf.org</a>; Abhay Roy (akr) &lt;<a moz-do-not-send=
=3D"true" href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I guess what we were trying to envision=
 the use case and whether it makes sense for all the nodes in the IGP routi=
ng domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Additionally, if it is needed in the IG=
Ps, should there also be a BGP-LS Link Attribute TLV proposed?&nbsp;</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee&nbsp;</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF
                      1.0pt;padding:3.0pt 0in 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Alexander Vainshtein &lt;<a moz-do-not-send=3D"true=
" href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@eci=
tele.com</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a moz-do-not-send=3D"true" href=3D"mailto:gregi=
mirsky@gmail.com">gregimirsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsbe=
rg)&quot; &lt;<a moz-do-not-send=3D"true" href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a moz-do-not-send=3D"true" href=3D"mailto:acee@=
cisco.com">acee@cisco.com</a>&gt;, Robert Sparks &lt;<a moz-do-not-send=3D"=
true" href=3D"mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;, &q=
uot;<a moz-do-not-send=3D"true" href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot;
 &lt;<a moz-do-not-send=3D"true" href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&gt;, &quot;<a moz-do-not-send=3D"true" href=3D"mailto:gen-art@ietf.or=
g">gen-art@ietf.org</a>&quot; &lt;<a moz-do-not-send=3D"true" href=3D"mailt=
o:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a moz-do-not-send=3D"t=
rue" href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf=
-mpls-residence-time.all@ietf.org</a>&quot;
 &lt;<a moz-do-not-send=3D"true" href=3D"mailto:draft-ietf-mpls-residence-t=
ime.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quo=
t;<a moz-do-not-send=3D"true" href=3D"mailto:ietf@ietf.org">ietf@ietf.org</=
a>&quot; &lt;<a moz-do-not-send=3D"true" href=3D"mailto:ietf@ietf.org">ietf=
@ietf.org</a>&gt;,
 &quot;<a moz-do-not-send=3D"true" href=3D"mailto:isis-chairs@ietf.org">isi=
s-chairs@ietf.org</a>&quot; &lt;<a moz-do-not-send=3D"true" href=3D"mailto:=
isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&q=
uot; &lt;<a moz-do-not-send=3D"true" href=3D"mailto:akr@cisco.com">akr@cisc=
o.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid
                      #B5C4DF 4.5pt;padding:0in 0in 0in
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.=
0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Hi all,</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">I concur with Greg: from my POV an in=
teroperable solution should not depend on an omniscient NMS client distribu=
ting information about capabilities of each node
 to each other node. </span><span style=3D"color:black"><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Regards,</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Sasha</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Office: &#43;972-39266302</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &=
#43;972-549266302</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Email:&nbsp;&nbsp;
<a moz-do-not-send=3D"true" href=3D"mailto:Alexander.Vainshtein@ecitele.com=
">Alexander.Vainshtein@ecitele.com</a></span><span style=3D"color:black"><o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Greg M=
irsky [<a moz-do-not-send=3D"true" href=3D"mailto:gregimirsky@gmail.com">ma=
ilto:gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a moz-do-not-send=3D"true" href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a moz-do-not-send=3D"true" href=3D"mailt=
o:acee@cisco.com">acee@cisco.com</a>&gt;; Robert Sparks &lt;<a moz-do-not-s=
end=3D"true" href=3D"mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&=
gt;;
<a moz-do-not-send=3D"true" href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>=
; <a moz-do-not-send=3D"true" href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a moz-do-not-send=3D"true" href=3D"mailto:draft-ietf=
-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a moz-do-not-send=3D"true=
" href=3D"mailto:ietf@ietf.org">
ietf@ietf.org</a>; <a moz-do-not-send=3D"true" href=3D"mailto:isis-chairs@i=
etf.org">isis-chairs@ietf.org</a>; Abhay Roy (akr) &lt;<a moz-do-not-send=
=3D"true" href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a moz-do-not-send=3D"true" href=3D"ma=
ilto:ginsberg@cisco.com" target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote=
:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid
                                #CCCCCC 1.0pt;padding:0in 0in 0in
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0=
pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Greg =96</span><span style=3D"color:black"><o:p></o=
:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">I am having trouble understanding your response.</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The question we are raising is whether we should ex=
tend the IGPs to support advertising RTM capability
 =96 an alternative being to retrieve the capability via network management=
.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Saying that the IGP functionality is optional and/o=
r wouldn=92t always be advertised doesn=92t really answer
 the question of whether we should or should not define the IGP extensions.=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Could you respond more directly to this point?</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<div style=3D"border:none;border-left:solid
                                      blue 1.5pt;padding:0in 0in 0in
                                      4.0pt">
<div>
<div style=3D"border:none;border-top:solid
                                          #B5C4DF 1.0pt;padding:3.0pt
                                          0in 0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black">From:</span></b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black"> Greg Mirsky
 [mailto:<a moz-do-not-send=3D"true" href=3D"mailto:gregimirsky@gmail.com" =
target=3D"_blank">gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a moz-do-not-send=3D"true" href=3D"mailto:mpls@i=
etf.org" target=3D"_blank">
mpls@ietf.org</a>; <a moz-do-not-send=3D"true" href=3D"mailto:gen-art@ietf.=
org" target=3D"_blank">
gen-art@ietf.org</a>; <a moz-do-not-send=3D"true" href=3D"mailto:draft-ietf=
-mpls-residence-time.all@ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a moz-do-not-send=3D"true=
" href=3D"mailto:ietf@ietf.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a moz-do-not-send=3D"true" hre=
f=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a moz-do-not-send=3D"true" href=3D"mailto:acee@cisco.com=
" target=3D"_blank">acee@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Greg,&nbsp;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Although it is a bit late, we=92ve had some discussio=
ns amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain =96 is it really needed on every node=
 or will it the RTM testing be initiated from an omniscient NMS client that=
 would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Thanks,</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Acee &nbsp;</span><span style=3D"color:black"><o:p></=
o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div style=3D"border:none;border-top:solid
                                                  #B5C4DF
                                                  1.0pt;padding:3.0pt
                                                  0in 0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">mpls &lt;<a moz-do-not-send=3D"true" href=3D"mailto=
:mpls-bounces@ietf.org" target=3D"_blank">mpls-bounces@ietf.org</a>&gt; on =
behalf of Greg Mirsky &lt;<a moz-do-not-send=3D"true" href=3D"mailto:gregim=
irsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a moz-do-not-send=3D"true" href=3D"mailto:rjs=
parks@nostrum.com" target=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a moz-do-not-send=3D"true" href=3D"mailto:mpls@ietf.org" =
target=3D"_blank">mpls@ietf.org</a>&quot; &lt;<a moz-do-not-send=3D"true" h=
ref=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ietf.org</a>&gt;, &quot=
;<a moz-do-not-send=3D"true" href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot;
 &lt;<a moz-do-not-send=3D"true" href=3D"mailto:gen-art@ietf.org" target=3D=
"_blank">gen-art@ietf.org</a>&gt;, &quot;<a moz-do-not-send=3D"true" href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank">d=
raft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a moz-do-not-send=
=3D"true" href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;,
 &quot;<a moz-do-not-send=3D"true" href=3D"mailto:ietf@ietf.org" target=3D"=
_blank">ietf@ietf.org</a>&quot; &lt;<a moz-do-not-send=3D"true" href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<blockquote style=3D"border:none;border-left:solid
                                                      #B5C4DF
                                                      4.5pt;padding:0in
                                                      0in 0in
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.=
0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK_ATTRIBUTI=
ON_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">thank you for the most expedient review and comments.=
 I'll make changes in Section 2 per your suggestion.</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks &lt;<=
a moz-do-not-send=3D"true" href=3D"mailto:rjsparks@nostrum.com" target=3D"_=
blank">rjsparks@nostrum.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">The changes all look good.</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">I still think you should say something in the document abou=
t what &quot;the time of packet arrival&quot; and &quot;transmission&quot; =
means, and call out the point you made about being careful to not
 introduce apparent jitter by not making those measurements consistently. (=
The definitions you point to in your earlier mail from G.8013 don't really =
help - they just say &quot;time of packet arrival&quot;. Again, the first a=
nd last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Please look at the new first paragraph of section 2 - there=
's a mix of &quot;as case&quot; and &quot;in case&quot; that should be made=
 consistent. I suspect it would be easiest to simply say &quot;referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">RjS</span><span style=3D"color:black"><o:p></o:p></span></p=
>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</span><span s=
tyle=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Sasha Vainshtein came with elegant idea to address di=
sconnection between discussion of one-step and two-step
 modes that you've pointed out. We've moved Section 7 as sub-section into S=
ection 2 now. Attached are updated diff and the proposed new version -13.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky &lt;<a m=
oz-do-not-send=3D"true" href=3D"mailto:gregimirsky@gmail.com" target=3D"_bl=
ank">gregimirsky@gmail.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">once again, thank you for your thorough review and th=
e most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks &lt;<a=
 moz-do-not-send=3D"true" href=3D"mailto:rjsparks@nostrum.com" target=3D"_b=
lank">rjsparks@nostrum.com</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid
                                                          #CCCCCC
                                                          1.0pt;padding:0in
                                                          0in 0in
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0=
pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a moz-do-not-send=3D"true" href=3D"https://trac.ietf.org/trac/gen/wiki=
/GenArtfaq" target=3D"_blank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq=
</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].<br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
<br>
</div>
</div>
</blockquote>
</span>
</body>
</html>

--_000_D4A6D5DC9550Caceeciscocom_--


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From: "Tarek Saad (tsaad)" <tsaad@cisco.com>
To: "mpls@ietf.org" <mpls@ietf.org>
Thread-Topic: MPLS Base YANG Module
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--_000_495ABB6004F94ADC95B04081DDA05E0Dciscocom_--


From nobody Thu Jan 19 20:30:42 2017
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To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, John E Drake <jdrake@juniper.net>, "Acee Lindem (acee)" <acee@cisco.com>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
References: <148414970343.8167.4538946698521330202.idtracker@ietfa.amsl.com> <CA+RyBmU9W5QP4EjbPezoCpdLHv1RJCrzJvxQmeTnAvjO_6vbJA@mail.gmail.com> <CA+RyBmVrvyiwDp2kV3VLiQtqOaL=MaVjZugGbvgWnp6y3dwP3Q@mail.gmail.com> <95d41b52-5c85-869f-2139-6713816e9637@nostrum.com> <CA+RyBmWcvU70BZYRj8ZHUZrmkcwq1eHS38jFpyZOq3A_5eXZ9g@mail.gmail.com> <D4A55AE0.9483E%acee@cisco.com> <CA+RyBmWrDhZUmVN0t8aLsL6F3ZfnvBu8FW_2VjDmwj-ercLd5w@mail.gmail.com> <f315026a140148898250f8fa3bdb0123@XCH-ALN-001.cisco.com> <CA+RyBmWMBAXd+zntuAeOU9x7xs9BQSk7J-z9+yyUDvKPd3v2MA@mail.gmail.com> <HE1PR0301MB22660A73C0D5A96BA8F3F0D39D7E0@HE1PR0301MB2266.eurprd03.prod.outlook.com> <D4A65103.94DF0%acee@cisco.com> <DM5PR05MB3001952D0DDD2AA672697094C77E0@DM5PR05MB3001.namprd05.prod.outlook.com> <D4A6573B.94E53%acee@cisco.com> <DM5PR05MB3001ED6AF8296F5DBE5E38EFC77E0@DM5PR05MB3001.namprd05.prod.outlook.com> <3f43cfdfe76e437bb2df6159e5644ae5@XCH-ALN-001.cisco.com>
From: Hannes Gredler <hannes@gredler.at>
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Date: Fri, 20 Jan 2017 05:30:31 +0100
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Cc: "Abhay Roy \(akr\)" <akr@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, Robert Sparks <rjsparks@nostrum.com>, "ietf@ietf.org" <ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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hi les,

we have taken turns long-time ago to advertise non-routing
related information which is only relevant to controllers
(l2bundles comes into mind ;-)).

while it would have been nice to get at least notice that
an IS-IS extension is being worked on (i mean prior to
IANA asking for expert review :-/ ) i see no reason why we
should hold this back. - we can argue perhaps whether it should
be part of GENAPP or ROUTERCAP TLVs, but i cannot see the
sky falling to advertise a non-routing related capability,
that does not change frequently.

/hannes

On 1/19/17 18:24, Les Ginsberg (ginsberg) wrote:
> John –
> 
>  
> 
> For me, this raises the age-old question of when it is/is not
> appropriate to use IGPs for flooding information.
> 
>  
> 
> This is clearly not TE information – you just happen to be using this in
> conjunction with MPLS – but it is a generic capability. I do not see the
> IGPs as the appropriate mechanism to flood generic interface
> capabilities. It also, as Acee has pointed out, results in flooding
> information to all nodes in the domain when only a few care about it.
> 
>  
> 
>    Les
> 
>  
> 
> *From:*John E Drake [mailto:jdrake@juniper.net]
> *Sent:* Thursday, January 19, 2017 8:54 AM
> *To:* Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les
> Ginsberg (ginsberg)
> *Cc:* Robert Sparks; mpls@ietf.org; gen-art@ietf.org;
> draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org;
> isis-chairs@ietf.org; Abhay Roy (akr)
> *Subject:* RE: [mpls] Review of draft-ietf-mpls-residence-time-12
> 
>  
> 
> Acee,
> 
>  
> 
> Relying on an omniscient controller is a non-starter in general and in
> particular because the protocol by which it would learn each node’s RTM
> capabilities and distribute them to the other nodes is undefined. 
> Further, one of the ways by which an omniscient controller learns a
> node’s capabilities is by snooping the link/state database.
> 
>  
> 
> Yours Irrespectively,
> 
>  
> 
> John
> 
>  
> 
> *From:*Acee Lindem (acee) [mailto:acee@cisco.com]
> *Sent:* Thursday, January 19, 2017 11:47 AM
> *To:* John E Drake <jdrake@juniper.net <mailto:jdrake@juniper.net>>;
> Alexander Vainshtein <Alexander.Vainshtein@ecitele.com
> <mailto:Alexander.Vainshtein@ecitele.com>>; Greg Mirsky
> <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>; Les Ginsberg
> (ginsberg) <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
> *Cc:* Robert Sparks <rjsparks@nostrum.com
> <mailto:rjsparks@nostrum.com>>; mpls@ietf.org <mailto:mpls@ietf.org>;
> gen-art@ietf.org <mailto:gen-art@ietf.org>;
> draft-ietf-mpls-residence-time.all@ietf.org
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org
> <mailto:ietf@ietf.org>; isis-chairs@ietf.org
> <mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com
> <mailto:akr@cisco.com>>
> *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
> 
>  
> 
> Hi John, 
> 
>  
> 
> *From: *John E Drake <jdrake@juniper.net <mailto:jdrake@juniper.net>>
> *Date: *Thursday, January 19, 2017 at 10:43 AM
> *To: *Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>, Alexander
> Vainshtein <Alexander.Vainshtein@ecitele.com
> <mailto:Alexander.Vainshtein@ecitele.com>>, Greg Mirsky
> <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>, "Les Ginsberg
> (ginsberg)" <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
> *Cc: *Robert Sparks <rjsparks@nostrum.com
> <mailto:rjsparks@nostrum.com>>, "mpls@ietf.org <mailto:mpls@ietf.org>"
> <mpls@ietf.org <mailto:mpls@ietf.org>>, "gen-art@ietf.org
> <mailto:gen-art@ietf.org>" <gen-art@ietf.org <mailto:gen-art@ietf.org>>,
> "draft-ietf-mpls-residence-time.all@ietf.org
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>"
> <draft-ietf-mpls-residence-time.all@ietf.org
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org
> <mailto:ietf@ietf.org>" <ietf@ietf.org <mailto:ietf@ietf.org>>,
> "isis-chairs@ietf.org <mailto:isis-chairs@ietf.org>"
> <isis-chairs@ietf.org <mailto:isis-chairs@ietf.org>>, "Abhay Roy (akr)"
> <akr@cisco.com <mailto:akr@cisco.com>>
> *Subject: *RE: [mpls] Review of draft-ietf-mpls-residence-time-12
> 
>  
> 
>     Acee,
> 
>      
> 
>     We discussed all of this with you over a year ago and used your
>     guidance in adding the indication of RTM capability to OSPF.
> 
>  
> 
> I’m sorry but I focused mainly on the OSPF protocol aspects then and
> didn’t question the use case. This question came up in the IS-IS WG
> discussions. 
> 
>  
> 
> Thanks,
> 
> Acee
> 
>  
> 
>      
> 
>     Yours Irrespectively,
> 
>      
> 
>     John
> 
>      
> 
>     *From:*Acee Lindem (acee) [mailto:acee@cisco.com]
>     *Sent:* Thursday, January 19, 2017 11:38 AM
>     *To:* Alexander Vainshtein <Alexander.Vainshtein@ecitele.com
>     <mailto:Alexander.Vainshtein@ecitele.com>>; Greg Mirsky
>     <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>; Les Ginsberg
>     (ginsberg) <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
>     *Cc:* Robert Sparks <rjsparks@nostrum.com
>     <mailto:rjsparks@nostrum.com>>; mpls@ietf.org
>     <mailto:mpls@ietf.org>; gen-art@ietf.org <mailto:gen-art@ietf.org>;
>     draft-ietf-mpls-residence-time.all@ietf.org
>     <mailto:draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org
>     <mailto:ietf@ietf.org>; isis-chairs@ietf.org
>     <mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com
>     <mailto:akr@cisco.com>>
>     *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
> 
>      
> 
>     I guess what we were trying to envision the use case and whether it
>     makes sense for all the nodes in the IGP routing domain to have this
>     information. Would the LSP ingress LSR only need to if the egress
>     LSR supports RTM and it is best effort recording for transit LSRs in
>     the path?  
> 
>      
> 
>     Additionally, if it is needed in the IGPs, should there also be a
>     BGP-LS Link Attribute TLV proposed? 
> 
>      
> 
>     Thanks,
> 
>     Acee 
> 
>      
> 
>     *From: *Alexander Vainshtein <Alexander.Vainshtein@ecitele.com
>     <mailto:Alexander.Vainshtein@ecitele.com>>
>     *Date: *Thursday, January 19, 2017 at 10:15 AM
>     *To: *Greg Mirsky <gregimirsky@gmail.com
>     <mailto:gregimirsky@gmail.com>>, "Les Ginsberg (ginsberg)"
>     <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
>     *Cc: *Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>, Robert
>     Sparks <rjsparks@nostrum.com <mailto:rjsparks@nostrum.com>>,
>     "mpls@ietf.org <mailto:mpls@ietf.org>" <mpls@ietf.org
>     <mailto:mpls@ietf.org>>, "gen-art@ietf.org
>     <mailto:gen-art@ietf.org>" <gen-art@ietf.org
>     <mailto:gen-art@ietf.org>>,
>     "draft-ietf-mpls-residence-time.all@ietf.org
>     <mailto:draft-ietf-mpls-residence-time.all@ietf.org>"
>     <draft-ietf-mpls-residence-time.all@ietf.org
>     <mailto:draft-ietf-mpls-residence-time.all@ietf.org>>,
>     "ietf@ietf.org <mailto:ietf@ietf.org>" <ietf@ietf.org
>     <mailto:ietf@ietf.org>>, "isis-chairs@ietf.org
>     <mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org
>     <mailto:isis-chairs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com
>     <mailto:akr@cisco.com>>
>     *Subject: *RE: [mpls] Review of draft-ietf-mpls-residence-time-12
> 
>      
> 
>         Hi all,
> 
>         I concur with Greg: from my POV an interoperable solution should
>         not depend on an omniscient NMS client distributing information
>         about capabilities of each node to each other node.
> 
>          
> 
>          
> 
>         Regards,
> 
>         Sasha
> 
>          
> 
>         Office: +972-39266302
> 
>         Cell:      +972-549266302
> 
>         Email:   Alexander.Vainshtein@ecitele.com
>         <mailto:Alexander.Vainshtein@ecitele.com>
> 
>          
> 
>         *From:*Greg Mirsky [mailto:gregimirsky@gmail.com]
>         *Sent:* Thursday, January 19, 2017 6:01 PM
>         *To:* Les Ginsberg (ginsberg) <ginsberg@cisco.com
>         <mailto:ginsberg@cisco.com>>
>         *Cc:* Acee Lindem (acee) <acee@cisco.com
>         <mailto:acee@cisco.com>>; Robert Sparks <rjsparks@nostrum.com
>         <mailto:rjsparks@nostrum.com>>; mpls@ietf.org
>         <mailto:mpls@ietf.org>; gen-art@ietf.org
>         <mailto:gen-art@ietf.org>;
>         draft-ietf-mpls-residence-time.all@ietf.org
>         <mailto:draft-ietf-mpls-residence-time.all@ietf.org>;
>         ietf@ietf.org <mailto:ietf@ietf.org>; isis-chairs@ietf.org
>         <mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com
>         <mailto:akr@cisco.com>>
>         *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
> 
>          
> 
>         Hi Les,
> 
>         I believe that IGP extensions to advertise RTM capability are
>         required.
> 
>          
> 
>         Regards,
> 
>         Greg
> 
>          
> 
>         On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg)
>         <ginsberg@cisco.com <mailto:ginsberg@cisco.com>> wrote:
> 
>             Greg –
> 
>              
> 
>             I am having trouble understanding your response.
> 
>             The question we are raising is whether we should extend the
>             IGPs to support advertising RTM capability – an alternative
>             being to retrieve the capability via network management.
> 
>              
> 
>             Saying that the IGP functionality is optional and/or
>             wouldn’t always be advertised doesn’t really answer the
>             question of whether we should or should not define the IGP
>             extensions.
> 
>              
> 
>             Could you respond more directly to this point?
> 
>              
> 
>                Les
> 
>              
> 
>              
> 
>             *From:*Greg Mirsky [mailto:gregimirsky@gmail.com
>             <mailto:gregimirsky@gmail.com>]
>             *Sent:* Thursday, January 19, 2017 7:44 AM
>             *To:* Acee Lindem (acee)
>             *Cc:* Robert Sparks; mpls@ietf.org <mailto:mpls@ietf.org>;
>             gen-art@ietf.org <mailto:gen-art@ietf.org>;
>             draft-ietf-mpls-residence-time.all@ietf.org
>             <mailto:draft-ietf-mpls-residence-time.all@ietf.org>;
>             ietf@ietf.org <mailto:ietf@ietf.org>; Les Ginsberg
>             (ginsberg); isis-chairs@ietf.org
>             <mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
> 
> 
>             *Subject:* Re: [mpls] Review of
>             draft-ietf-mpls-residence-time-12
> 
>              
> 
>             Hi Acee,
> 
>             the draft defines optional functionality. If an operator has
>             no use neither for PTP's Transparent Clock, nor RTM itself
>             as performance metric, then RTM sub-TLV would not be
>             included and thus it would not be flooded. Of course, it be
>             right to reflect RTM capability through YANG data model,
>             thus allowing SDN scenario you've described.
> 
>              
> 
>             Regards,
> 
>             Greg
> 
>              
> 
>             On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee)
>             <acee@cisco.com <mailto:acee@cisco.com>> wrote:
> 
>             Hi Greg, 
> 
>              
> 
>             Although it is a bit late, we’ve had some discussions
>             amongst the IS-IS and OSPF chairs and are wondering whether
>             the interface capability belongs in the IGPs. This will be
>             flooded throughout the entire routing domain – is it really
>             needed on every node or will it the RTM testing be initiated
>             from an omniscient NMS client that would know the
>             capabilities of each node or easily query them using YANG? 
> 
>              
> 
>             Thanks,
> 
>             Acee  
> 
>              
> 
>             *From: *mpls <mpls-bounces@ietf.org
>             <mailto:mpls-bounces@ietf.org>> on behalf of Greg Mirsky
>             <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>
>             *Date: *Wednesday, January 18, 2017 at 1:25 PM
>             *To: *Robert Sparks <rjsparks@nostrum.com
>             <mailto:rjsparks@nostrum.com>>
>             *Cc: *"mpls@ietf.org <mailto:mpls@ietf.org>" <mpls@ietf.org
>             <mailto:mpls@ietf.org>>, "gen-art@ietf.org
>             <mailto:gen-art@ietf.org>" <gen-art@ietf.org
>             <mailto:gen-art@ietf.org>>,
>             "draft-ietf-mpls-residence-time.all@ietf.org
>             <mailto:draft-ietf-mpls-residence-time.all@ietf.org>"
>             <draft-ietf-mpls-residence-time.all@ietf.org
>             <mailto:draft-ietf-mpls-residence-time.all@ietf.org>>,
>             "ietf@ietf.org <mailto:ietf@ietf.org>" <ietf@ietf.org
>             <mailto:ietf@ietf.org>>
>             *Subject: *Re: [mpls] Review of
>             draft-ietf-mpls-residence-time-12
> 
>              
> 
>                 Hi Robert,
> 
>                 thank you for the most expedient review and comments.
>                 I'll make changes in Section 2 per your suggestion.
> 
>                  
> 
>                 Regards,
> 
>                 Greg
> 
>                  
> 
>                 On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks
>                 <rjsparks@nostrum.com <mailto:rjsparks@nostrum.com>> wrote:
> 
>                 The changes all look good.
> 
>                 I still think you should say something in the document
>                 about what "the time of packet arrival" and
>                 "transmission" means, and call out the point you made
>                 about being careful to not introduce apparent jitter by
>                 not making those measurements consistently. (The
>                 definitions you point to in your earlier mail from
>                 G.8013 don't really help - they just say "time of packet
>                 arrival". Again, the first and last bit are likely to be
>                 several nanoseconds apart so I think it matters. Perhaps
>                 you're saying it doesn't matter as long as each node is
>                 consistent (there will be error in the residence time
>                 measurement, but it will be constant at each node, so
>                 the sum of errors will be constant, and the clocks will
>                 be ok?)
> 
>                 Please look at the new first paragraph of section 2 -
>                 there's a mix of "as case" and "in case" that should be
>                 made consistent. I suspect it would be easiest to simply
>                 say "referred to as using a one-step clock" and
>                 "referred to as using a two-step clock" or similar.
> 
>                 RjS
> 
>                  
> 
>                 On 1/18/17 12:03 PM, Greg Mirsky wrote:
> 
>                     Hi Robert,
> 
>                     Sasha Vainshtein came with elegant idea to address
>                     disconnection between discussion of one-step and
>                     two-step modes that you've pointed out. We've moved
>                     Section 7 as sub-section into Section 2 now.
>                     Attached are updated diff and the proposed new
>                     version -13.
> 
>                      
> 
>                     Regards,
> 
>                     Greg
> 
>                      
> 
>                     On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky
>                     <gregimirsky@gmail.com
>                     <mailto:gregimirsky@gmail.com>> wrote:
> 
>                     Hi Robert,
> 
>                     once again, thank you for your thorough review and
>                     the most detailed comments. I've prepared updated
>                     version and would greatly appreciate if you review
>                     the changes and let us know whether your comments
>                     been addressed. Attached are diff and the new version.
> 
>                      
> 
>                     Regards,
> 
>                     Greg
> 
>                      
> 
>                     On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks
>                     <rjsparks@nostrum.com <mailto:rjsparks@nostrum.com>>
>                     wrote:
> 
>                         Reviewer: Robert Sparks
>                         Review result: Ready with Nits
> 
>                         I am the assigned Gen-ART reviewer for this
>                         draft. The General Area
>                         Review Team (Gen-ART) reviews all IETF documents
>                         being processed
>                         by the IESG for the IETF Chair.  Please treat
>                         these comments just
>                         like any other last call comments.
> 
>                         For more information, please see the FAQ at
>                         <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
> 
>                         Document: draft-ietf-mpls-residence-time-12
>                         Reviewer: Robert Sparks
>                         Review Date: 2017-01-10
>                         IETF LC End Date: 2017-01-17
>                         IESG Telechat date: 2017-02-02
> 
>                         Summary: Ready (with nits) for publication as a
>                         Proposed Standard
> 
>                         I have two primary comments. I expect both are
>                         rooted in the authors
>                         and working group knowing what the document
>                         means instead of seeing
>                         what
>                         it says or doesn't say:
> 
>                         1) The document is loose with its use of
>                         'packet', and where TTLs
>                         appear when
>                         they are discussed. It might be helpful to
>                         rephrase the text that
>                         speaks
>                         of RTM packets in terms of RTM messages that are
>                         encoded as G-ACh
>                         messages and
>                         not refer to packets unless you mean the whole
>                         encapsulated packet
>                         with MPLS
>                         header, ACH, and G-ACh message.
> 
>                         2) Since this new mechanic speaks in terms of
>                         fractional nanoseconds,
>                         some
>                         discussion of what trigger-point you intend
>                         people to use for taking
>                         the
>                         precise time of a packet's arrival or departure
>                         seems warranted. (The
>                         first and
>                         last bit of the whole encapsulated packet above
>                         are going to appear at
>                         the
>                         physical layer many nanoseconds apart at OC192
>                         speeds if I've done the
>                         math
>                         right). It may be obvious to the folks
>                         discussing this, but it's not
>                         obvious
>                         from the document.  If it's _not_ obvious and
>                         variation in technique
>                         is
>                         expected, then some discussion about issues that
>                         might arise from
>                         different
>                         implementation choices would be welcome.
> 
>                         The rest of these are editorial nits:
> 
>                         It would help to pull an overview description of
>                         the difference
>                         between
>                         one-step and two-step much earlier in the
>                         document. I suggest in the
>                         overview
>                         in section 2. Otherwise, the reader really has
>                         to jump forward and
>                         read section
>                         7 before section 3's 5th bullet makes any sense.
> 
>                         In section 3, "IANA will be asked" should be
>                         made active. Say "This
>                         document
>                         asks IANA to" and point to the IANA
>                         consideration section. Apply
>                         similar
>                         treatment to the other places where you talk
>                         about future IANA
>                         actions.
> 
>                         There are several places where there are missing
>                         words (typically
>                         articles or
>                         prepositions). You're less likely to end up with
>                         misinterpretations
>                         during the
>                         RFC Editor phase if you provide them before the
>                         document gets that far
>                         in the
>                         process. The spots I found most disruptive were
>                         these (this is not
>                         intended to
>                         be exhaustive):
> 
>                           Section 3: "set 1 according" -> "set to 1
>                         according"
>                           Section 3: "the Table 19 [IEEE..." -> "Table
>                         19 of [IEEE..."
>                           Section 4.2: "Detailed discussion of ... modes
>                         in Section 7."
>                                                 -> "Detailed discussion
>                         of ... modes appears
>                         in Section 7."
>                           Section 10: "most of" -> "most of all"
> 
>                         In Setion 3.1 at "identity of the source port",
>                         please point into the
>                         document
>                         that defines this identity and its
>                         representation. I suspect this is a
>                         pointer
>                         into a specific section in IEEE.1588.2008].
> 
> 
>                      
> 
>                      
> 
>                  
> 
>                  
> 
>              
> 
>          
> 


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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Hannes Gredler <hannes@gredler.at>, "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, John E Drake <jdrake@juniper.net>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
Thread-Index: AQHSbCJB5/J9FhRihUGkooHDmaxKNqE+xygAgAAe3oCAAAhzgIAADjuA///l8YCAAW6sgIAAA9UAgAAAtwCAAAQ8gP//smMAgABVU4D//605gAAKuHIAAAEVUIAAFz6hgAAGyCIA
Date: Fri, 20 Jan 2017 12:44:49 +0000
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Hi Hannes,=20

On 1/19/17, 11:30 PM, "Hannes Gredler" <hannes@gredler.at> wrote:

>hi les,
>
>we have taken turns long-time ago to advertise non-routing
>related information which is only relevant to controllers
>(l2bundles comes into mind ;-)).
>
>while it would have been nice to get at least notice that
>an IS-IS extension is being worked on (i mean prior to
>IANA asking for expert review :-/ ) i see no reason why we
>should hold this back. - we can argue perhaps whether it should
>be part of GENAPP or ROUTERCAP TLVs, but i cannot see the
>sky falling to advertise a non-routing related capability,
>that does not change frequently.

I agree but was just trying to get a better idea of precisely how the
information will be used and whether interface is the right granularity.

Thanks,
Acee=20




>
>/hannes
>
>On 1/19/17 18:24, Les Ginsberg (ginsberg) wrote:
>> John =AD
>>=20
>> =20
>>=20
>> For me, this raises the age-old question of when it is/is not
>> appropriate to use IGPs for flooding information.
>>=20
>> =20
>>=20
>> This is clearly not TE information =AD you just happen to be using this =
in
>> conjunction with MPLS =AD but it is a generic capability. I do not see t=
he
>> IGPs as the appropriate mechanism to flood generic interface
>> capabilities. It also, as Acee has pointed out, results in flooding
>> information to all nodes in the domain when only a few care about it.
>>=20
>> =20
>>=20
>>    Les
>>=20
>> =20
>>=20
>> *From:*John E Drake [mailto:jdrake@juniper.net]
>> *Sent:* Thursday, January 19, 2017 8:54 AM
>> *To:* Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les
>> Ginsberg (ginsberg)
>> *Cc:* Robert Sparks; mpls@ietf.org; gen-art@ietf.org;
>> draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org;
>> isis-chairs@ietf.org; Abhay Roy (akr)
>> *Subject:* RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>>=20
>> =20
>>=20
>> Acee,
>>=20
>> =20
>>=20
>> Relying on an omniscient controller is a non-starter in general and in
>> particular because the protocol by which it would learn each node=B9s RT=
M
>> capabilities and distribute them to the other nodes is undefined.
>> Further, one of the ways by which an omniscient controller learns a
>> node=B9s capabilities is by snooping the link/state database.
>>=20
>> =20
>>=20
>> Yours Irrespectively,
>>=20
>> =20
>>=20
>> John
>>=20
>> =20
>>=20
>> *From:*Acee Lindem (acee) [mailto:acee@cisco.com]
>> *Sent:* Thursday, January 19, 2017 11:47 AM
>> *To:* John E Drake <jdrake@juniper.net <mailto:jdrake@juniper.net>>;
>> Alexander Vainshtein <Alexander.Vainshtein@ecitele.com
>> <mailto:Alexander.Vainshtein@ecitele.com>>; Greg Mirsky
>> <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>; Les Ginsberg
>> (ginsberg) <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
>> *Cc:* Robert Sparks <rjsparks@nostrum.com
>> <mailto:rjsparks@nostrum.com>>; mpls@ietf.org <mailto:mpls@ietf.org>;
>> gen-art@ietf.org <mailto:gen-art@ietf.org>;
>> draft-ietf-mpls-residence-time.all@ietf.org
>> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org
>> <mailto:ietf@ietf.org>; isis-chairs@ietf.org
>> <mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com
>> <mailto:akr@cisco.com>>
>> *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>>=20
>> =20
>>=20
>> Hi John,=20
>>=20
>> =20
>>=20
>> *From: *John E Drake <jdrake@juniper.net <mailto:jdrake@juniper.net>>
>> *Date: *Thursday, January 19, 2017 at 10:43 AM
>> *To: *Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>, Alexander
>> Vainshtein <Alexander.Vainshtein@ecitele.com
>> <mailto:Alexander.Vainshtein@ecitele.com>>, Greg Mirsky
>> <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>, "Les Ginsberg
>> (ginsberg)" <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
>> *Cc: *Robert Sparks <rjsparks@nostrum.com
>> <mailto:rjsparks@nostrum.com>>, "mpls@ietf.org <mailto:mpls@ietf.org>"
>> <mpls@ietf.org <mailto:mpls@ietf.org>>, "gen-art@ietf.org
>> <mailto:gen-art@ietf.org>" <gen-art@ietf.org <mailto:gen-art@ietf.org>>,
>> "draft-ietf-mpls-residence-time.all@ietf.org
>> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>"
>> <draft-ietf-mpls-residence-time.all@ietf.org
>> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org
>> <mailto:ietf@ietf.org>" <ietf@ietf.org <mailto:ietf@ietf.org>>,
>> "isis-chairs@ietf.org <mailto:isis-chairs@ietf.org>"
>> <isis-chairs@ietf.org <mailto:isis-chairs@ietf.org>>, "Abhay Roy (akr)"
>> <akr@cisco.com <mailto:akr@cisco.com>>
>> *Subject: *RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>>=20
>> =20
>>=20
>>     Acee,
>>=20
>>     =20
>>=20
>>     We discussed all of this with you over a year ago and used your
>>     guidance in adding the indication of RTM capability to OSPF.
>>=20
>> =20
>>=20
>> I=B9m sorry but I focused mainly on the OSPF protocol aspects then and
>> didn=B9t question the use case. This question came up in the IS-IS WG
>> discussions.=20
>>=20
>> =20
>>=20
>> Thanks,
>>=20
>> Acee
>>=20
>> =20
>>=20
>>     =20
>>=20
>>     Yours Irrespectively,
>>=20
>>     =20
>>=20
>>     John
>>=20
>>     =20
>>=20
>>     *From:*Acee Lindem (acee) [mailto:acee@cisco.com]
>>     *Sent:* Thursday, January 19, 2017 11:38 AM
>>     *To:* Alexander Vainshtein <Alexander.Vainshtein@ecitele.com
>>     <mailto:Alexander.Vainshtein@ecitele.com>>; Greg Mirsky
>>     <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>; Les Ginsberg
>>     (ginsberg) <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
>>     *Cc:* Robert Sparks <rjsparks@nostrum.com
>>     <mailto:rjsparks@nostrum.com>>; mpls@ietf.org
>>     <mailto:mpls@ietf.org>; gen-art@ietf.org <mailto:gen-art@ietf.org>;
>>     draft-ietf-mpls-residence-time.all@ietf.org
>>     <mailto:draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org
>>     <mailto:ietf@ietf.org>; isis-chairs@ietf.org
>>     <mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com
>>     <mailto:akr@cisco.com>>
>>     *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>>=20
>>     =20
>>=20
>>     I guess what we were trying to envision the use case and whether it
>>     makes sense for all the nodes in the IGP routing domain to have this
>>     information. Would the LSP ingress LSR only need to if the egress
>>     LSR supports RTM and it is best effort recording for transit LSRs in
>>     the path? =20
>>=20
>>     =20
>>=20
>>     Additionally, if it is needed in the IGPs, should there also be a
>>     BGP-LS Link Attribute TLV proposed?
>>=20
>>     =20
>>=20
>>     Thanks,
>>=20
>>     Acee=20
>>=20
>>     =20
>>=20
>>     *From: *Alexander Vainshtein <Alexander.Vainshtein@ecitele.com
>>     <mailto:Alexander.Vainshtein@ecitele.com>>
>>     *Date: *Thursday, January 19, 2017 at 10:15 AM
>>     *To: *Greg Mirsky <gregimirsky@gmail.com
>>     <mailto:gregimirsky@gmail.com>>, "Les Ginsberg (ginsberg)"
>>     <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
>>     *Cc: *Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>, Robert
>>     Sparks <rjsparks@nostrum.com <mailto:rjsparks@nostrum.com>>,
>>     "mpls@ietf.org <mailto:mpls@ietf.org>" <mpls@ietf.org
>>     <mailto:mpls@ietf.org>>, "gen-art@ietf.org
>>     <mailto:gen-art@ietf.org>" <gen-art@ietf.org
>>     <mailto:gen-art@ietf.org>>,
>>     "draft-ietf-mpls-residence-time.all@ietf.org
>>     <mailto:draft-ietf-mpls-residence-time.all@ietf.org>"
>>     <draft-ietf-mpls-residence-time.all@ietf.org
>>     <mailto:draft-ietf-mpls-residence-time.all@ietf.org>>,
>>     "ietf@ietf.org <mailto:ietf@ietf.org>" <ietf@ietf.org
>>     <mailto:ietf@ietf.org>>, "isis-chairs@ietf.org
>>     <mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org
>>     <mailto:isis-chairs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com
>>     <mailto:akr@cisco.com>>
>>     *Subject: *RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>>=20
>>     =20
>>=20
>>         Hi all,
>>=20
>>         I concur with Greg: from my POV an interoperable solution should
>>         not depend on an omniscient NMS client distributing information
>>         about capabilities of each node to each other node.
>>=20
>>         =20
>>=20
>>         =20
>>=20
>>         Regards,
>>=20
>>         Sasha
>>=20
>>         =20
>>=20
>>         Office: +972-39266302
>>=20
>>         Cell:      +972-549266302
>>=20
>>         Email:   Alexander.Vainshtein@ecitele.com
>>         <mailto:Alexander.Vainshtein@ecitele.com>
>>=20
>>         =20
>>=20
>>         *From:*Greg Mirsky [mailto:gregimirsky@gmail.com]
>>         *Sent:* Thursday, January 19, 2017 6:01 PM
>>         *To:* Les Ginsberg (ginsberg) <ginsberg@cisco.com
>>         <mailto:ginsberg@cisco.com>>
>>         *Cc:* Acee Lindem (acee) <acee@cisco.com
>>         <mailto:acee@cisco.com>>; Robert Sparks <rjsparks@nostrum.com
>>         <mailto:rjsparks@nostrum.com>>; mpls@ietf.org
>>         <mailto:mpls@ietf.org>; gen-art@ietf.org
>>         <mailto:gen-art@ietf.org>;
>>         draft-ietf-mpls-residence-time.all@ietf.org
>>         <mailto:draft-ietf-mpls-residence-time.all@ietf.org>;
>>         ietf@ietf.org <mailto:ietf@ietf.org>; isis-chairs@ietf.org
>>         <mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com
>>         <mailto:akr@cisco.com>>
>>         *Subject:* Re: [mpls] Review of
>>draft-ietf-mpls-residence-time-12
>>=20
>>         =20
>>=20
>>         Hi Les,
>>=20
>>         I believe that IGP extensions to advertise RTM capability are
>>         required.
>>=20
>>         =20
>>=20
>>         Regards,
>>=20
>>         Greg
>>=20
>>         =20
>>=20
>>         On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg)
>>         <ginsberg@cisco.com <mailto:ginsberg@cisco.com>> wrote:
>>=20
>>             Greg =AD
>>=20
>>             =20
>>=20
>>             I am having trouble understanding your response.
>>=20
>>             The question we are raising is whether we should extend the
>>             IGPs to support advertising RTM capability =AD an alternativ=
e
>>             being to retrieve the capability via network management.
>>=20
>>             =20
>>=20
>>             Saying that the IGP functionality is optional and/or
>>             wouldn=B9t always be advertised doesn=B9t really answer the
>>             question of whether we should or should not define the IGP
>>             extensions.
>>=20
>>             =20
>>=20
>>             Could you respond more directly to this point?
>>=20
>>             =20
>>=20
>>                Les
>>=20
>>             =20
>>=20
>>             =20
>>=20
>>             *From:*Greg Mirsky [mailto:gregimirsky@gmail.com
>>             <mailto:gregimirsky@gmail.com>]
>>             *Sent:* Thursday, January 19, 2017 7:44 AM
>>             *To:* Acee Lindem (acee)
>>             *Cc:* Robert Sparks; mpls@ietf.org <mailto:mpls@ietf.org>;
>>             gen-art@ietf.org <mailto:gen-art@ietf.org>;
>>             draft-ietf-mpls-residence-time.all@ietf.org
>>             <mailto:draft-ietf-mpls-residence-time.all@ietf.org>;
>>             ietf@ietf.org <mailto:ietf@ietf.org>; Les Ginsberg
>>             (ginsberg); isis-chairs@ietf.org
>>             <mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
>>=20
>>=20
>>             *Subject:* Re: [mpls] Review of
>>             draft-ietf-mpls-residence-time-12
>>=20
>>             =20
>>=20
>>             Hi Acee,
>>=20
>>             the draft defines optional functionality. If an operator has
>>             no use neither for PTP's Transparent Clock, nor RTM itself
>>             as performance metric, then RTM sub-TLV would not be
>>             included and thus it would not be flooded. Of course, it be
>>             right to reflect RTM capability through YANG data model,
>>             thus allowing SDN scenario you've described.
>>=20
>>             =20
>>=20
>>             Regards,
>>=20
>>             Greg
>>=20
>>             =20
>>=20
>>             On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee)
>>             <acee@cisco.com <mailto:acee@cisco.com>> wrote:
>>=20
>>             Hi Greg,
>>=20
>>             =20
>>=20
>>             Although it is a bit late, we=B9ve had some discussions
>>             amongst the IS-IS and OSPF chairs and are wondering whether
>>             the interface capability belongs in the IGPs. This will be
>>             flooded throughout the entire routing domain =AD is it reall=
y
>>             needed on every node or will it the RTM testing be initiated
>>             from an omniscient NMS client that would know the
>>             capabilities of each node or easily query them using YANG?
>>=20
>>             =20
>>=20
>>             Thanks,
>>=20
>>             Acee
>>=20
>>             =20
>>=20
>>             *From: *mpls <mpls-bounces@ietf.org
>>             <mailto:mpls-bounces@ietf.org>> on behalf of Greg Mirsky
>>             <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>
>>             *Date: *Wednesday, January 18, 2017 at 1:25 PM
>>             *To: *Robert Sparks <rjsparks@nostrum.com
>>             <mailto:rjsparks@nostrum.com>>
>>             *Cc: *"mpls@ietf.org <mailto:mpls@ietf.org>" <mpls@ietf.org
>>             <mailto:mpls@ietf.org>>, "gen-art@ietf.org
>>             <mailto:gen-art@ietf.org>" <gen-art@ietf.org
>>             <mailto:gen-art@ietf.org>>,
>>             "draft-ietf-mpls-residence-time.all@ietf.org
>>             <mailto:draft-ietf-mpls-residence-time.all@ietf.org>"
>>             <draft-ietf-mpls-residence-time.all@ietf.org
>>             <mailto:draft-ietf-mpls-residence-time.all@ietf.org>>,
>>             "ietf@ietf.org <mailto:ietf@ietf.org>" <ietf@ietf.org
>>             <mailto:ietf@ietf.org>>
>>             *Subject: *Re: [mpls] Review of
>>             draft-ietf-mpls-residence-time-12
>>=20
>>             =20
>>=20
>>                 Hi Robert,
>>=20
>>                 thank you for the most expedient review and comments.
>>                 I'll make changes in Section 2 per your suggestion.
>>=20
>>                =20
>>=20
>>                 Regards,
>>=20
>>                 Greg
>>=20
>>                =20
>>=20
>>                 On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks
>>                 <rjsparks@nostrum.com <mailto:rjsparks@nostrum.com>>
>>wrote:
>>=20
>>                 The changes all look good.
>>=20
>>                 I still think you should say something in the document
>>                 about what "the time of packet arrival" and
>>                 "transmission" means, and call out the point you made
>>                 about being careful to not introduce apparent jitter by
>>                 not making those measurements consistently. (The
>>                 definitions you point to in your earlier mail from
>>                 G.8013 don't really help - they just say "time of packet
>>                 arrival". Again, the first and last bit are likely to be
>>                 several nanoseconds apart so I think it matters. Perhaps
>>                 you're saying it doesn't matter as long as each node is
>>                 consistent (there will be error in the residence time
>>                 measurement, but it will be constant at each node, so
>>                 the sum of errors will be constant, and the clocks will
>>                 be ok?)
>>=20
>>                 Please look at the new first paragraph of section 2 -
>>                 there's a mix of "as case" and "in case" that should be
>>                 made consistent. I suspect it would be easiest to simply
>>                 say "referred to as using a one-step clock" and
>>                 "referred to as using a two-step clock" or similar.
>>=20
>>                 RjS
>>=20
>>                =20
>>=20
>>                 On 1/18/17 12:03 PM, Greg Mirsky wrote:
>>=20
>>                     Hi Robert,
>>=20
>>                     Sasha Vainshtein came with elegant idea to address
>>                     disconnection between discussion of one-step and
>>                     two-step modes that you've pointed out. We've moved
>>                     Section 7 as sub-section into Section 2 now.
>>                     Attached are updated diff and the proposed new
>>                     version -13.
>>=20
>>                =20
>>=20
>>                     Regards,
>>=20
>>                     Greg
>>=20
>>                =20
>>=20
>>                     On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky
>>                     <gregimirsky@gmail.com
>>                     <mailto:gregimirsky@gmail.com>> wrote:
>>=20
>>                     Hi Robert,
>>=20
>>                     once again, thank you for your thorough review and
>>                     the most detailed comments. I've prepared updated
>>                     version and would greatly appreciate if you review
>>                     the changes and let us know whether your comments
>>                     been addressed. Attached are diff and the new
>>version.
>>=20
>>                =20
>>=20
>>                     Regards,
>>=20
>>                     Greg
>>=20
>>                =20
>>=20
>>                     On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks
>>                     <rjsparks@nostrum.com <mailto:rjsparks@nostrum.com>>
>>                     wrote:
>>=20
>>                         Reviewer: Robert Sparks
>>                         Review result: Ready with Nits
>>=20
>>                         I am the assigned Gen-ART reviewer for this
>>                         draft. The General Area
>>                         Review Team (Gen-ART) reviews all IETF documents
>>                         being processed
>>                         by the IESG for the IETF Chair.  Please treat
>>                         these comments just
>>                         like any other last call comments.
>>=20
>>                         For more information, please see the FAQ at
>>                         <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
>>=20
>>                         Document: draft-ietf-mpls-residence-time-12
>>                         Reviewer: Robert Sparks
>>                         Review Date: 2017-01-10
>>                         IETF LC End Date: 2017-01-17
>>                         IESG Telechat date: 2017-02-02
>>=20
>>                         Summary: Ready (with nits) for publication as a
>>                         Proposed Standard
>>=20
>>                         I have two primary comments. I expect both are
>>                         rooted in the authors
>>                         and working group knowing what the document
>>                         means instead of seeing
>>                         what
>>                         it says or doesn't say:
>>=20
>>                         1) The document is loose with its use of
>>                         'packet', and where TTLs
>>                         appear when
>>                         they are discussed. It might be helpful to
>>                         rephrase the text that
>>                         speaks
>>                         of RTM packets in terms of RTM messages that are
>>                         encoded as G-ACh
>>                         messages and
>>                         not refer to packets unless you mean the whole
>>                         encapsulated packet
>>                         with MPLS
>>                         header, ACH, and G-ACh message.
>>=20
>>                         2) Since this new mechanic speaks in terms of
>>                         fractional nanoseconds,
>>                         some
>>                         discussion of what trigger-point you intend
>>                         people to use for taking
>>                         the
>>                         precise time of a packet's arrival or departure
>>                         seems warranted. (The
>>                         first and
>>                         last bit of the whole encapsulated packet above
>>                         are going to appear at
>>                         the
>>                         physical layer many nanoseconds apart at OC192
>>                         speeds if I've done the
>>                         math
>>                         right). It may be obvious to the folks
>>                         discussing this, but it's not
>>                         obvious
>>                         from the document.  If it's _not_ obvious and
>>                         variation in technique
>>                         is
>>                         expected, then some discussion about issues that
>>                         might arise from
>>                         different
>>                         implementation choices would be welcome.
>>=20
>>                         The rest of these are editorial nits:
>>=20
>>                         It would help to pull an overview description of
>>                         the difference
>>                         between
>>                         one-step and two-step much earlier in the
>>                         document. I suggest in the
>>                         overview
>>                         in section 2. Otherwise, the reader really has
>>                         to jump forward and
>>                         read section
>>                         7 before section 3's 5th bullet makes any sense.
>>=20
>>                         In section 3, "IANA will be asked" should be
>>                         made active. Say "This
>>                         document
>>                         asks IANA to" and point to the IANA
>>                         consideration section. Apply
>>                         similar
>>                         treatment to the other places where you talk
>>                         about future IANA
>>                         actions.
>>=20
>>                         There are several places where there are missing
>>                         words (typically
>>                         articles or
>>                         prepositions). You're less likely to end up with
>>                         misinterpretations
>>                         during the
>>                         RFC Editor phase if you provide them before the
>>                         document gets that far
>>                         in the
>>                         process. The spots I found most disruptive were
>>                         these (this is not
>>                         intended to
>>                         be exhaustive):
>>=20
>>                           Section 3: "set 1 according" -> "set to 1
>>                         according"
>>                           Section 3: "the Table 19 [IEEE..." -> "Table
>>                         19 of [IEEE..."
>>                           Section 4.2: "Detailed discussion of ... modes
>>                         in Section 7."
>>                                                 -> "Detailed discussion
>>                         of ... modes appears
>>                         in Section 7."
>>                           Section 10: "most of" -> "most of all"
>>=20
>>                         In Setion 3.1 at "identity of the source port",
>>                         please point into the
>>                         document
>>                         that defines this identity and its
>>                         representation. I suspect this is a
>>                         pointer
>>                         into a specific section in IEEE.1588.2008].
>>=20
>>=20
>>                =20
>>=20
>>                =20
>>=20
>>                =20
>>=20
>>                =20
>>=20
>>             =20
>>=20
>>         =20
>>=20


From nobody Fri Jan 20 08:11:34 2017
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From: "Adrian Farrel" <adrian@olddog.co.uk>
To: "'Acee Lindem \(acee\)'" <acee@cisco.com>, "'Hannes Gredler'" <hannes@gredler.at>, "'Les Ginsberg \(ginsberg\)'" <ginsberg@cisco.com>, "'John E Drake'" <jdrake@juniper.net>, "'Alexander Vainshtein'" <Alexander.Vainshtein@ecitele.com>, "'Greg Mirsky'" <gregimirsky@gmail.com>
References: <148414970343.8167.4538946698521330202.idtracker@ietfa.amsl.com> <CA+RyBmU9W5QP4EjbPezoCpdLHv1RJCrzJvxQmeTnAvjO_6vbJA@mail.gmail.com> <CA+RyBmVrvyiwDp2kV3VLiQtqOaL=MaVjZugGbvgWnp6y3dwP3Q@mail.gmail.com> <95d41b52-5c85-869f-2139-6713816e9637@nostrum.com> <CA+RyBmWcvU70BZYRj8ZHUZrmkcwq1eHS38jFpyZOq3A_5eXZ9g@mail.gmail.com> <D4A55AE0.9483E%acee@cisco.com> <CA+RyBmWrDhZUmVN0t8aLsL6F3ZfnvBu8FW_2VjDmwj-ercLd5w@mail.gmail.com> <f315026a140148898250f8fa3bdb0123@XCH-ALN-001.cisco.com> <CA+RyBmWMBAXd+zntuAeOU9x7xs9BQSk7J-z9+yyUDvKPd3v2MA@mail.gmail.com> <HE1PR0301MB22660A73C0D5A96BA8F3F0D39D7E0@HE1PR0301MB2266.eurprd03.prod.outlook.com> <D4A65103.94DF0%acee@cisco.com> <DM5PR05MB3001952D0DDD2AA672697094C77E0@DM5PR05MB3001.namprd05.prod.outlook.com> <D4A6573B.94E53%acee@cisco.com> <DM5PR05MB3001ED6AF8296F5DBE5E38EFC77E0@DM5PR05MB3001.namprd05.prod.outlook.com> <3f43cfdfe76e437bb2df6159e5644ae5@XCH-ALN-001.cisco.com> <01e66ab2-aea1-4d60-63c6-9304d644381f@gredler.at> <D4A77012! .95F4B%acee@cisco.com>
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Date: Fri, 20 Jan 2017 16:10:43 -0000
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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I agree with Hannes on this.

However, if the document was to highlight strongly that the data is "a
non-routing related capability" (if that's what we believe!) and stress that the
information "that does not change frequently" (perhaps with some explanation of
"frequently") I believe that might help everyone.

Adrian

> >we have taken turns long-time ago to advertise non-routing
> >related information which is only relevant to controllers
> >(l2bundles comes into mind ;-)).
> >
> >while it would have been nice to get at least notice that
> >an IS-IS extension is being worked on (i mean prior to
> >IANA asking for expert review :-/ ) i see no reason why we
> >should hold this back. - we can argue perhaps whether it should
> >be part of GENAPP or ROUTERCAP TLVs, but i cannot see the
> >sky falling to advertise a non-routing related capability,
> >that does not change frequently.
> 
> I agree but was just trying to get a better idea of precisely how the
> information will be used and whether interface is the right granularity.


From nobody Fri Jan 20 16:45:06 2017
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From: Santosh Esale <sesale@juniper.net>
To: "bruno.decraene@orange.com" <bruno.decraene@orange.com>, "rtg-ads@ietf.org" <rtg-ads@ietf.org>, "draft-ietf-mpls-app-aware-tldp@tools.ietf.org" <draft-ietf-mpls-app-aware-tldp@tools.ietf.org>
Thread-Topic: [mpls] Routing directorate review of draft-ietf-mpls-app-aware-tldp
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--_000_D4A3A262E06A8sesalejunipernet_--


From nobody Fri Jan 20 16:51:48 2017
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Multiprotocol Label Switching of the IETF.

        Title           : Application-aware Targeted LDP
        Authors         : Santosh Esale
                          Raveendra Torvi
                          Luay Jalil
                          Uma Chunduri
                          Kamran Raza
	Filename        : draft-ietf-mpls-app-aware-tldp-06.txt
	Pages           : 17
	Date            : 2017-01-20

Abstract:
   Recent targeted LDP (tLDP) applications such as remote loop-free
   alternate (LFA) and BGP auto discovered pseudowire may automatically
   establish a tLDP session to any LSR in a network.  The initiating LSR
   has information about the targeted applications to administratively
   control initiation of the session. However, the responding LSR has no
   such information to control acceptance of this session. This document
   defines a mechanism to advertise and negotiate Targeted Applications
   Capability (TAC) during LDP session initialization.  As the
   responding LSR becomes aware of targeted applications, it may
   establish a limited number of tLDP sessions for certain applications.
   In addition, each targeted application is mapped to LDP Forwarding
   Equivalence Class (FEC) Elements to advertise only necessary LDP FEC-
   label bindings over the session. This document updates RFC 7473.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-mpls-app-aware-tldp/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-mpls-app-aware-tldp-06

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-app-aware-tldp-06


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/q4jEe5RWYf_LOuxfr3vKanG1aLk>
Cc: "mpls@ietf.org" <mpls@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, Robert Sparks <rjsparks@nostrum.com>, "Abhay Roy \(akr\)" <akr@cisco.com>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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--_000_HE1PR0301MB22663C3DF269FDBC0F5DA8319D700HE1PR0301MB2266_
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Eric, Les and all,
I concur with Eric. RTM capability is a kind of TE information that the pat=
h computation algorithm must take into account when selecting the suitable =
path for the LSP that would be used for RTM purposes.

My 2c,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com

From: Eric Gray [mailto:eric.gray@ericsson.com]
Sent: Thursday, January 19, 2017 10:32 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com>; Uma Chunduri <uma.chundur=
i@huawei.com>; John E Drake <jdrake@juniper.net>; Acee Lindem (acee) <acee@=
cisco.com>; Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>; Greg M=
irsky <gregimirsky@gmail.com>
Cc: mpls@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; gen-art@ietf.org; d=
raft-ietf-mpls-residence-time.all@ietf.org; Abhay Roy (akr) <akr@cisco.com>=
; Robert Sparks <rjsparks@nostrum.com>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Les,

                It's nice to have a good discussion about technical aspects=
 of a proposed standard, even late in the game.

                But I have some difficulty is seeing how this usage is "cle=
arly not TE information."

This information should allow the head-end of an LSP to select a path based=
 on desirable interface capabilities.  For the purposes of accurate time in=
formation, the best path may not also be the shortest path.  Is this not ex=
actly what traffic engineering is about?

As far as extending this argument to the ability to advertise additional li=
nk capabilities, I can easily imagine scenarios where that would make sense=
.  But nobody is suggesting that every LSR (or router for that matter) eith=
er must have this capability for every scenario, or that - having the capab=
ility - it would need to be turned on.

If there is an application or use-case out there that might require adverti=
sing every conceivable interface capability, then vendors will want to take=
 a look at the size of the opportunity represented by that and make a decis=
ion as to whether or not to support this.

--
Eric

From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Les Ginsberg (ginsbe=
rg)
Sent: Thursday, January 19, 2017 3:11 PM
To: Uma Chunduri <uma.chunduri@huawei.com<mailto:uma.chunduri@huawei.com>>;=
 John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Acee Lindem =
(acee) <acee@cisco.com<mailto:acee@cisco.com>>; Alexander Vainshtein <Alexa=
nder.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>; Greg=
 Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: mpls@ietf.org<mailto:mpls@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org=
>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; gen-art@ietf.org<mail=
to:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:dr=
aft-ietf-mpls-residence-time.all@ietf.org>; Abhay Roy (akr) <akr@cisco.com<=
mailto:akr@cisco.com>>; Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks=
@nostrum.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Uma -

I readily admit S-BFD descriptors are - strictly speaking - a violation of =
the "non-routing info" policy - this was publicly acknowledged at the time =
the drafts were written. The exception was justified on the basis that:

  o IGPs are BFD clients
  o The S-BFD discriminator information is unique and extremely modest in s=
ize

What we have here is a proposal to start advertising non-routing related in=
terface attribute information. There is nothing special or unique about RTM=
 - it is simply one of many interface attributes which are generic in natur=
e. Having agreed to advertise RTM in the IGPs, how would you then determine=
 what other interface attributes should/should not be advertised by the IGP=
s? Take a look at your favorite vendors box and see how many interface attr=
ibutes can be configured.
It is also concerning that - when using the IGPs - we flood information whi=
ch must be stored on every node even though the use case for it is limited =
to a much smaller subset.

I think we can and should be smarter in this regard - and given the extensi=
ve work being done to enhance manageability I would like to see us benefit =
from this.

The authors of draft-ietf-mpls-residence-time clearly had some thoughts in =
this regard - which is why they proposed to use RFC 6823 (GENAPP) in IS-IS =
to advertise the information -but the proposal in the draft is flawed in th=
is regard. If we were to head in the "application" direction I would propos=
e a much more generic "application" which is capable of advertising many in=
terface attributes. However this goes back to my original concern - whether=
 we want to use IGPs to flood interface attribute information unrelated to =
routing even if it is segregated under an application. Remember that RFC 68=
23 stipulates that a separate instance of the protocol (a la RFC 6822) be u=
sed for such cases.

   Les


From: Uma Chunduri [mailto:uma.chunduri@huawei.com]
Sent: Thursday, January 19, 2017 11:41 AM
To: Les Ginsberg (ginsberg); John E Drake; Acee Lindem (acee); Alexander Va=
inshtein; Greg Mirsky
Cc: Abhay Roy (akr); mpls@ietf.org<mailto:mpls@ietf.org>; isis-chairs@ietf.=
org<mailto:isis-chairs@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>=
; draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-reside=
nce-time.all@ietf.org>; Robert Sparks; ietf@ietf.org<mailto:ietf@ietf.org>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

I support advertising this in IGP.


>This is clearly not TE information -..
>I do not see the IGPs as the appropriate mechanism to flood generic interf=
ace capabilities

We have instances where both the above are not met and we flooded informati=
on.
https://tools.ietf.org/html/rfc7883 (Les, you co-authored the same!!)
https://tools.ietf.org/html/rfc7880

--
Uma C.

From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Les Ginsberg (ginsbe=
rg)
Sent: Thursday, January 19, 2017 9:25 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Acee Lind=
em (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Alexander Vainshtein <Al=
exander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>; G=
reg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>; mpls@ietf.org<ma=
ilto:mpls@ietf.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; gen=
-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@=
ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>; Robert Sparks=
 <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; ietf@ietf.org<mailto:=
ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

For me, this raises the age-old question of when it is/is not appropriate t=
o use IGPs for flooding information.

This is clearly not TE information - you just happen to be using this in co=
njunction with MPLS - but it is a generic capability. I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities. It a=
lso, as Acee has pointed out, results in flooding information to all nodes =
in the domain when only a few care about it.

   Les

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 8:54 AM
To: Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg (gi=
nsberg)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node's RTM capabil=
ities and distribute them to the other nodes is undefined.  Further, one of=
 the ways by which an omniscient controller learns a node's capabilities is=
 by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander=
 Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@e=
citele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.c=
om>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com=
>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I'm sorry but I focused mainly on the OSPF protocol aspects then and didn't=
 question the use case. This question came up in the IS-IS WG discussions.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].







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</head>
<body lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Eric, Les and all,<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">I concur with Eric. RTM capability is=
 a kind of TE information that the path computation algorithm must take int=
o account when selecting the suitable path for
 the LSP that would be used for RTM purposes. <o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">My 2c,</span><span style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A"><o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Sasha<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Office: &#43;972-39266302<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &=
#43;972-549266302<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Email:&nbsp;&nbsp; Alexander.Vainshte=
in@ecitele.com<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Eric Gray [mailto:eric.gray@er=
icsson.com]
<br>
<b>Sent:</b> Thursday, January 19, 2017 10:32 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;ginsberg@cisco.com&gt;; Uma Chunduri=
 &lt;uma.chunduri@huawei.com&gt;; John E Drake &lt;jdrake@juniper.net&gt;; =
Acee Lindem (acee) &lt;acee@cisco.com&gt;; Alexander Vainshtein &lt;Alexand=
er.Vainshtein@ecitele.com&gt;; Greg Mirsky &lt;gregimirsky@gmail.com&gt;<br=
>
<b>Cc:</b> mpls@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; gen-art@ietf=
.org; draft-ietf-mpls-residence-time.all@ietf.org; Abhay Roy (akr) &lt;akr@=
cisco.com&gt;; Robert Sparks &lt;rjsparks@nostrum.com&gt;<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Les,</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; It&#8217;s nice to have a good disc=
ussion about technical aspects of a proposed standard, even late in the gam=
e.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; But I have some difficulty is seein=
g how this usage is &#8220;clearly not TE information.&#8221;&nbsp;
</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"text-indent:36.0pt"><span style=3D"font-siz=
e:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">This information shoul=
d allow the head-end of an LSP to select a path based on desirable interfac=
e capabilities.&nbsp; For the purposes of accurate time
 information, the best path may not also be the shortest path.&nbsp; Is thi=
s not exactly what traffic engineering is about?</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"text-indent:36.0pt"><span style=3D"font-siz=
e:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">&nbsp;</span><o:p></o:=
p></p>
<p class=3D"MsoNormal" style=3D"text-indent:36.0pt"><span style=3D"font-siz=
e:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">As far as extending th=
is argument to the ability to advertise additional link capabilities, I can=
 easily imagine scenarios where that would make
 sense.&nbsp; But nobody is suggesting that every LSR (or router for that m=
atter) either must have this capability for every scenario, or that &#8211;=
 having the capability &#8211; it would need to be turned on.</span><o:p></=
o:p></p>
<p class=3D"MsoNormal" style=3D"text-indent:36.0pt"><span style=3D"font-siz=
e:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">&nbsp;</span><o:p></o:=
p></p>
<p class=3D"MsoNormal" style=3D"text-indent:36.0pt"><span style=3D"font-siz=
e:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">If there is an applica=
tion or use-case out there that might require advertising every conceivable=
 interface capability, then vendors will want to
 take a look at the size of the opportunity represented by that and make a =
decision as to whether or not to support this.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"text-indent:36.0pt"><span style=3D"font-siz=
e:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">&nbsp;</span><o:p></o:=
p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">--</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Eric</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;</span><o:p></o:p></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> mpls [<a href=3D"mailto:mpls-b=
ounces@ietf.org">mailto:mpls-bounces@ietf.org</a>]
<b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
<b>Sent:</b> Thursday, January 19, 2017 3:11 PM<br>
<b>To:</b> Uma Chunduri &lt;<a href=3D"mailto:uma.chunduri@huawei.com">uma.=
chunduri@huawei.com</a>&gt;; John E Drake &lt;<a href=3D"mailto:jdrake@juni=
per.net">jdrake@juniper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mail=
to:acee@cisco.com">acee@cisco.com</a>&gt;; Alexander Vainshtein
 &lt;<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshte=
in@ecitele.com</a>&gt;; Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail=
.com">gregimirsky@gmail.com</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"m=
ailto:ietf@ietf.org">
ietf@ietf.org</a>; <a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf=
.org</a>;
<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>; <a href=3D"mailto=
:draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; Abhay Roy (akr) &lt;<a hre=
f=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;; Robert Sparks &lt;<a href=
=3D"mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Uma &#8211;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">I readily admit S-BFD descriptors are=
 &#8211; strictly speaking - a violation of the &#8220;non-routing info&#82=
21; policy &#8211; this was publicly acknowledged at the time the drafts
 were written. The exception was justified on the basis that:</span><o:p></=
o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp; o IGPs are BFD clients</span><=
o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp; o The S-BFD discriminator info=
rmation is unique and extremely modest in size</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">What w=
e have here is a proposal to start advertising non-routing related interfac=
e attribute information. There is nothing special
 or unique about RTM &#8211; it is simply one of many interface attributes =
which are generic in nature. Having agreed to advertise RTM in the IGPs, ho=
w would you then determine what other interface attributes should/should no=
t be advertised by the IGPs? Take a look
 at your favorite vendors box and see how many interface attributes can be =
configured.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">It is also concerning that &#8211; wh=
en using the IGPs &#8211; we flood information which must be stored on ever=
y node even though the use case for it is limited to a much
 smaller subset.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">I think we can and should be smarter =
in this regard &#8211; and given the extensive work being done to enhance m=
anageability I would like to see us benefit from this.</span><o:p></o:p></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">The authors of draft-ietf-mpls-reside=
nce-time clearly had some thoughts in this regard &#8211; which is why they=
 proposed to use RFC 6823 (GENAPP) in IS-IS to advertise
 the information &#8211;but the proposal in the draft is flawed in this reg=
ard. If we were to head in the &#8220;application&#8221; direction I would =
propose a much more generic &#8220;application&#8221; which is capable of a=
dvertising many interface attributes. However this goes back to
 my original concern &#8211; whether we want to use IGPs to flood interface=
 attribute information unrelated to routing even if it is segregated under =
an application. Remember that RFC 6823 stipulates that a separate instance =
of the protocol (a la RFC 6822) be used
 for such cases.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les</span><o:p></o:p></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Uma Chunduri [<a href=3D"mailto:=
uma.chunduri@huawei.com">mailto:uma.chunduri@huawei.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:41 AM<br>
<b>To:</b> Les Ginsberg (ginsberg); John E Drake; Acee Lindem (acee); Alexa=
nder Vainshtein; Greg Mirsky<br>
<b>Cc:</b> Abhay Roy (akr); <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org<=
/a>; <a href=3D"mailto:isis-chairs@ietf.org">
isis-chairs@ietf.org</a>; <a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.=
org</a>;
<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-m=
pls-residence-time.all@ietf.org</a>; Robert Sparks;
<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a><br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">I support=
 advertising this in IGP.</span></a><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&gt;This is clearly not TE informatio=
n &#8211;..</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&gt;I do not see the IGPs as the appr=
opriate mechanism to flood generic interface capabilities</span><o:p></o:p>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We have instances where both the abov=
e are not met and we flooded information.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://tools.ietf.org/html/rfc7883"><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">htt=
ps://tools.ietf.org/html/rfc7883</span></a><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> (Les,
 you co-authored the same!!)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://tools.ietf.org/html/rfc7880"><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">htt=
ps://tools.ietf.org/html/rfc7880</span></a><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">--</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Uma C.</span><o:p></o:p></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> mpls [<a href=3D"mailto:mpls-b=
ounces@ietf.org">mailto:mpls-bounces@ietf.org</a>]
<b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
<b>Sent:</b> Thursday, January 19, 2017 9:25 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com"=
>acee@cisco.com</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexand=
er.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
 Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail=
.com</a>&gt;<br>
<b>Cc:</b> Abhay Roy (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.c=
om</a>&gt;; <a href=3D"mailto:mpls@ietf.org">
mpls@ietf.org</a>; <a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf=
.org</a>;
<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>; <a href=3D"mailto=
:draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; Robert Sparks &lt;<a href=
=3D"mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John &#8211;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">For me, this raises the age-old quest=
ion of when it is/is not appropriate to use IGPs for flooding information.<=
/span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">This is clearly not TE information &#=
8211; you just happen to be using this in conjunction with MPLS &#8211; but=
 it is a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les</span><o:p></o:p></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> John E Drake [<a href=3D"mailto:=
jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Relying on an omniscient controller i=
s a non-starter in general and in particular because the protocol by which =
it would learn each node&#8217;s RTM capabilities and
 distribute them to the other nodes is undefined.&nbsp; Further, one of the=
 ways by which an omniscient controller learns a node&#8217;s capabilities =
is by snooping the link/state database.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><o:p></o:=
p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><o:p></o:p></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Acee Lindem (acee) [<a href=3D=
"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vai=
nshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky =
&lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
 Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg=
@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi John,&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">John E Drake &lt;<a href=3D"mailto:jdrake@juniper.n=
et">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@e=
citele.com">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a hr=
ef=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<a hr=
ef=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft=
-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draf=
t-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>=
&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay =
Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<=
br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We discussed all of this with you ove=
r a year ago and used your guidance in adding the indication of RTM capabil=
ity to OSPF.</span><o:p></o:p></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I&#8217;m sorry but I focused mainly on=
 the OSPF protocol aspects then and didn&#8217;t question the use case. Thi=
s question came up in the IS-IS WG discussions.&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><o:p></o:=
p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><o:p></o:p></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Gin=
sberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.c=
om</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;</span><o:p></o:p>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I guess what we were trying to envision=
 the use case and whether it makes sense for all the nodes in the IGP routi=
ng domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><o:p></o:p></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Additionally, if it is needed in the IG=
Ps, should there also be a BGP-LS Link Attribute TLV proposed?&nbsp;</span>=
<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Alexander Vainshtein &lt;<a href=3D"mailto:Alexande=
r.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Hi all,</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">I concur with Greg: from my POV an in=
teroperable solution should not depend on an omniscient NMS client distribu=
ting information about capabilities of each node
 to each other node. </span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Regards,</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Sasha</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Office: &#43;972-39266302</span><o:p>=
</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &=
#43;972-549266302</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Greg M=
irsky [<a href=3D"mailto:gregimirsky@gmail.com">mailto:gregimirsky@gmail.co=
m</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;</span><o:p></o:p>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,</span><o:p></o:p=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;</span><o:p></o:p>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,</span><o:p></o:=
p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg</span><o:p></o:p></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;</span><o:p></o:p>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:</span><o:p></o:p></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Greg &#8211;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">I am having trouble understanding your response.</s=
pan><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The question we are raising is whether we should ex=
tend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Saying that the IGP functionality is optional and/o=
r wouldn&#8217;t always be advertised doesn&#8217;t really answer
 the question of whether we should or should not define the IGP extensions.=
</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Could you respond more directly to this point?</spa=
n><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp; Les</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><o:p></o:p></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black">From:</span></b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black"> Greg Mirsky
 [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimi=
rsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><o:p></o:p></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><o:p></o:p></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg</span><o:p></o:p></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:</span><o:p></o:p></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Greg,&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Although it is a bit late, we&#8217;ve had some discu=
ssions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Thanks,</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Acee &nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces@ietf.org" t=
arget=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Greg Mirsky &lt=
;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gma=
il.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><o:p></o:p></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">thank you for the most expedient review and comments.=
 I'll make changes in Section 2 per your suggestion.</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><o:p></o:p></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks &lt;<=
a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.c=
om</a>&gt;
 wrote:</span><o:p></o:p></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">The changes all look good.</span><o:p></o:p></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">I still think you should say something in the document abou=
t what &quot;the time of packet arrival&quot; and &quot;transmission&quot; =
means, and call out the point you made about being careful to not
 introduce apparent jitter by not making those measurements consistently. (=
The definitions you point to in your earlier mail from G.8013 don't really =
help - they just say &quot;time of packet arrival&quot;. Again, the first a=
nd last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><o:p></o:p></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Please look at the new first paragraph of section 2 - there=
's a mix of &quot;as case&quot; and &quot;in case&quot; that should be made=
 consistent. I suspect it would be easiest to simply say &quot;referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><o:p></o:p></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">RjS</span><o:p></o:p></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</span><o:p></=
o:p></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Sasha Vainshtein came with elegant idea to address di=
sconnection between discussion of one-step and two-step
 modes that you've pointed out. We've moved Section 7 as sub-section into S=
ection 2 now. Attached are updated diff and the proposed new version -13.</=
span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><o:p></o:p></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.co=
m</a>&gt;
 wrote:</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">once again, thank you for your thorough review and th=
e most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><o:p></o:p></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks &lt;<a=
 href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.co=
m</a>&gt;
 wrote:</span><o:p></o:p></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].</span><o:p></o:p></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><o:p></o:p></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;</span><o:p></o:p></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;</span><o:p></o:p>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</body>
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From: Mach Chen <mach.chen@huawei.com>
To: "adrian@olddog.co.uk" <adrian@olddog.co.uk>, "'Acee Lindem (acee)'" <acee@cisco.com>, "'Hannes Gredler'" <hannes@gredler.at>, "'Les Ginsberg (ginsberg)'" <ginsberg@cisco.com>, "'John E Drake'" <jdrake@juniper.net>, "'Alexander Vainshtein'" <Alexander.Vainshtein@ecitele.com>, "'Greg Mirsky'" <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Date: Sun, 22 Jan 2017 01:46:13 +0000
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References: <148414970343.8167.4538946698521330202.idtracker@ietfa.amsl.com> <CA+RyBmU9W5QP4EjbPezoCpdLHv1RJCrzJvxQmeTnAvjO_6vbJA@mail.gmail.com> <CA+RyBmVrvyiwDp2kV3VLiQtqOaL=MaVjZugGbvgWnp6y3dwP3Q@mail.gmail.com> <95d41b52-5c85-869f-2139-6713816e9637@nostrum.com> <CA+RyBmWcvU70BZYRj8ZHUZrmkcwq1eHS38jFpyZOq3A_5eXZ9g@mail.gmail.com> <D4A55AE0.9483E%acee@cisco.com> <CA+RyBmWrDhZUmVN0t8aLsL6F3ZfnvBu8FW_2VjDmwj-ercLd5w@mail.gmail.com> <f315026a140148898250f8fa3bdb0123@XCH-ALN-001.cisco.com> <CA+RyBmWMBAXd+zntuAeOU9x7xs9BQSk7J-z9+yyUDvKPd3v2MA@mail.gmail.com> <HE1PR0301MB22660A73C0D5A96BA8F3F0D39D7E0@HE1PR0301MB2266.eurprd03.prod.outlook.com> <D4A65103.94DF0%acee@cisco.com> <DM5PR05MB3001952D0DDD2AA672697094C77E0@DM5PR05MB3001.namprd05.prod.outlook.com> <D4A6573B.94E53%acee@cisco.com> <DM5PR05MB3001ED6AF8296F5DBE5E38EFC77E0@DM5PR05MB3001.namprd05.prod.outlook.com> <3f43cfdfe76e437bb2df6159e5644ae5@XCH-ALN-001.cisco.com> <01e66ab2-aea1-4d60-63c6-9304d644381f@gredler.at> <D4A77012! .95F4B%acee@cisco.com> <081b01d27337$c32b0e20$49812a60$@olddog.co.uk>
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Sounds like a good idea, I agree with this.

Best regards,
Mach

-----Original Message-----
From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Adrian Farrel
Sent: Saturday, January 21, 2017 12:11 AM
To: 'Acee Lindem (acee)'; 'Hannes Gredler'; 'Les Ginsberg (ginsberg)'; 'Joh=
n E Drake'; 'Alexander Vainshtein'; 'Greg Mirsky'
Cc: mpls@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; gen-art@ietf.org; d=
raft-ietf-mpls-residence-time.all@ietf.org; 'Abhay Roy (akr)'; 'Robert Spar=
ks'
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I agree with Hannes on this.

However, if the document was to highlight strongly that the data is "a non-=
routing related capability" (if that's what we believe!) and stress that th=
e information "that does not change frequently" (perhaps with some explanat=
ion of
"frequently") I believe that might help everyone.

Adrian

> >we have taken turns long-time ago to advertise non-routing related=20
> >information which is only relevant to controllers (l2bundles comes=20
> >into mind ;-)).
> >
> >while it would have been nice to get at least notice that an IS-IS=20
> >extension is being worked on (i mean prior to IANA asking for expert=20
> >review :-/ ) i see no reason why we should hold this back. - we can=20
> >argue perhaps whether it should be part of GENAPP or ROUTERCAP TLVs,=20
> >but i cannot see the sky falling to advertise a non-routing related=20
> >capability, that does not change frequently.
>=20
> I agree but was just trying to get a better idea of precisely how the=20
> information will be used and whether interface is the right granularity.

_______________________________________________
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Hey John,
 
I realise that your email was two months ago, but I don't see any responses in
the archive and so I thought I would try to understand why by re-reading your
email.
 
I think it is very probably completely unclear to everyone who is not following
Detnet exactly what you're asking for.
 
Reading your email (and none of the Detnet documents) I am not clear whether you
plan to transport deterministic Ethernet over some as yet unspecified data plane
(which you might choose or enhance based on its capabilities), whether you
propose to map the features of the transported deterministic Ethernet to
features of the transport, whether you hope to map the features of the
deterministic Ethernet to features of the transport so that only the data is
actually transported, or what. You could, for example, use a transport that has
no scheduling and queueing support, but that is also non-blocking.
 
Indeed, the word "transport" probably immediately made half of your audience
think one thing (transport network) and the other half another thing (transport
layer protocol).
 
Of course, I went the extra mile ;-) and looked at your slide. Sadly no light
was shed.
 
I suspect the answer you're looking for is not "why not use deterministic
Ethernet as your transport?" and similarly "have you thought of using a photonic
network?"
 
Can you better phrase your question for the audience?
 
Thanks,
Adrian
 
From: detnet [mailto:detnet-bounces@ietf.org] On Behalf Of John Dowdell
Sent: 15 November 2016 05:32
To: teas@ietf.org; mpls@ietf.org; detnet@ietf.org
Subject: [Detnet] Help wanted in detnet
 
Hi all in mpls and teas groups (consolidating earlier posting only on mpls)
 
Over in detnet wg we are working on transporting deterministic Ethernet (e.g.
from 802.1TSN LANs) across the wide area for applications such as industrial
control and audio/video broadcast. One of the key assumptions is that the
underlying transport already has sufficient scheduling and queueing support to
allow proper extension of time-sensitive (or even time-critical) traffic over,
for example, MPLS.
 
To help us validate that assumption, please can someone volunteer to help us?
Feel free to come over to the detnet list. Recommendations on exactly which
flavour(s) of MPLS and/or configurations and/or gotchas would be most welcome.
 
The slides in question are here
https://www.ietf.org/proceedings/97/slides/slides-97-detnet-detnet-data-plane-02
.pptx, slide 4.
 
Many thanks in anticipation.
 
John
 
 
 
 

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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-GB link=3Dblue =
vlink=3Dpurple style=3D'tab-interval:36.0pt'><div =
class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>Hey =
John,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>I realise that your email was =
two months ago, but I don't see any responses in the archive and so I =
thought I would try to understand why by re-reading your =
email.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>I think it is very probably =
completely unclear to everyone who is not following Detnet exactly what =
you're asking for.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>Reading your email (and none =
of the Detnet documents) I am not clear whether you plan to transport =
deterministic Ethernet over some as yet unspecified data plane (which =
you might choose or enhance based on its capabilities), whether you =
propose to map the features of the transported deterministic Ethernet to =
features of the transport, whether you hope to map the features of the =
deterministic Ethernet to features of the transport so that only the =
data is actually transported, or what. You could, for example, use a =
transport that has no scheduling and queueing support, but that is also =
non-blocking.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>Indeed, the word =
&quot;transport&quot; probably immediately made half of your audience =
think one thing (transport network) and the other half another thing =
(transport layer protocol).<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>Of course, I went the extra =
mile ;-) and looked at your slide. Sadly no light was =
shed.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>I suspect the answer you're =
looking for is not &quot;why not use deterministic Ethernet as your =
transport?&quot; and similarly &quot;have you thought of using a =
photonic network?&quot;<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>Can you better phrase your =
question for the audience?<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New =
Roman";color:#1F497D'>Thanks,<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New Roman";color:#1F497D'>Adrian<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-fon=
t-family:"Times New =
Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal><b><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-f=
ont-family:"Times New =
Roman";mso-ansi-language:EN-US'>From:</span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-f=
ont-family:"Times New Roman";mso-ansi-language:EN-US'> detnet =
[mailto:detnet-bounces@ietf.org] <b>On Behalf Of </b>John =
Dowdell<br><b>Sent:</b> 15 November 2016 05:32<br><b>To:</b> =
teas@ietf.org; mpls@ietf.org; detnet@ietf.org<br><b>Subject:</b> =
[Detnet] Help wanted in detnet<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
style=3D'mso-fareast-font-family:"Times New Roman"'>Hi all in mpls and =
teas groups (consolidating earlier posting only on =
mpls)<o:p></o:p></span></p><div><p class=3DMsoNormal><span =
style=3D'mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p></div><div><div><p =
class=3DMsoNormal><span style=3D'mso-fareast-font-family:"Times New =
Roman"'>Over in detnet wg we are working on transporting deterministic =
Ethernet (e.g. from 802.1TSN LANs) across the wide area for applications =
such as industrial control and audio/video broadcast. One of the key =
assumptions is that the underlying transport already has sufficient =
scheduling and queueing support to allow proper extension of =
time-sensitive (or even time-critical) traffic over, for example, =
MPLS.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p></div><div><p =
class=3DMsoNormal><span style=3D'mso-fareast-font-family:"Times New =
Roman"'>To help us validate that assumption, please can someone =
volunteer to help us? Feel free to come over to the detnet list. =
Recommendations on exactly which flavour(s) of MPLS and/or =
configurations and/or gotchas would be most =
welcome.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p></div><div><p =
class=3DMsoNormal><span style=3D'mso-fareast-font-family:"Times New =
Roman"'>The slides in question are here&nbsp;<a =
href=3D"https://www.ietf.org/proceedings/97/slides/slides-97-detnet-detne=
t-data-plane-02.pptx">https://www.ietf.org/proceedings/97/slides/slides-9=
7-detnet-detnet-data-plane-02.pptx</a>, slide =
4.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p></div><div><p =
class=3DMsoNormal><span style=3D'mso-fareast-font-family:"Times New =
Roman"'>Many thanks in anticipation.<o:p></o:p></span></p></div><p =
class=3DMsoNormal><span style=3D'mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p><div><p class=3DMsoNormal><span =
style=3D'mso-fareast-font-family:"Times New =
Roman"'>John<o:p></o:p></span></p></div><div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:9.0pt;font-family:"Helvetica","sans-serif";mso-fareast=
-font-family:"Times New =
Roman";color:black'><o:p>&nbsp;</o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:9.0pt;font-family:"Helvetica","sans-serif";mso-fareast=
-font-family:"Times New =
Roman";color:black'><o:p>&nbsp;</o:p></span></p></div><p =
class=3DMsoNormal><span style=3D'mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p></div><p class=3DMsoNormal><span =
style=3D'mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p></div></div></div></body></html>
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From: Lou Berger <lberger@labn.net>
To: <adrian@olddog.co.uk>, "'John Dowdell'" <john.dowdell.ietf@gmail.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/hepV8S_3dsus2vOmoECu77N2_nw>
Cc: mpls@ietf.org, detnet@ietf.org, teas@ietf.org
Subject: Re: [mpls] [Detnet] Help wanted in detnet
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Hi  adrian.

I think we have good synergy now happening on the participant and chair 
levels.  Check out [1] as one example...

Lou
[1] https://www.ietf.org/mail-archive/web/detnet/current/msg00887.html


On January 22, 2017 5:24:17 PM "Adrian Farrel" <adrian@olddog.co.uk> wrote:

> Hey John,
>
> I realise that your email was two months ago, but I don't see any responses in
> the archive and so I thought I would try to understand why by re-reading your
> email.
>
> I think it is very probably completely unclear to everyone who is not following
> Detnet exactly what you're asking for.
>
> Reading your email (and none of the Detnet documents) I am not clear 
> whether you
> plan to transport deterministic Ethernet over some as yet unspecified data 
> plane
> (which you might choose or enhance based on its capabilities), whether you
> propose to map the features of the transported deterministic Ethernet to
> features of the transport, whether you hope to map the features of the
> deterministic Ethernet to features of the transport so that only the data is
> actually transported, or what. You could, for example, use a transport that has
> no scheduling and queueing support, but that is also non-blocking.
>
> Indeed, the word "transport" probably immediately made half of your audience
> think one thing (transport network) and the other half another thing (transport
> layer protocol).
>
> Of course, I went the extra mile ;-) and looked at your slide. Sadly no light
> was shed.
>
> I suspect the answer you're looking for is not "why not use deterministic
> Ethernet as your transport?" and similarly "have you thought of using a 
> photonic
> network?"
>
> Can you better phrase your question for the audience?
>
> Thanks,
> Adrian
>
> From: detnet [mailto:detnet-bounces@ietf.org] On Behalf Of John Dowdell
> Sent: 15 November 2016 05:32
> To: teas@ietf.org; mpls@ietf.org; detnet@ietf.org
> Subject: [Detnet] Help wanted in detnet
>
> Hi all in mpls and teas groups (consolidating earlier posting only on mpls)
>
> Over in detnet wg we are working on transporting deterministic Ethernet (e.g.
> from 802.1TSN LANs) across the wide area for applications such as industrial
> control and audio/video broadcast. One of the key assumptions is that the
> underlying transport already has sufficient scheduling and queueing support to
> allow proper extension of time-sensitive (or even time-critical) traffic over,
> for example, MPLS.
>
> To help us validate that assumption, please can someone volunteer to help us?
> Feel free to come over to the detnet list. Recommendations on exactly which
> flavour(s) of MPLS and/or configurations and/or gotchas would be most welcome.
>
> The slides in question are here
> https://www.ietf.org/proceedings/97/slides/slides-97-detnet-detnet-data-plane-02
> .pptx, slide 4.
>
> Many thanks in anticipation.
>
> John
>
>
>
>
>
>
>
> ----------
> _______________________________________________
> detnet mailing list
> detnet@ietf.org
> https://www.ietf.org/mailman/listinfo/detnet
>

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<div style="color: black;">
<p style="margin: 0 0 1em 0; color: black;">Hi&nbsp; adrian.&nbsp; </p>
<p style="margin: 0 0 1em 0; color: black;">I think we have good synergy
now happening on the participant and chair levels.&nbsp; Check out [1] as
one example...</p>
<p style="margin: 0 0 1em 0; color: black;">Lou<br>
[1] <a
href="https://www.ietf.org/mail-archive/web/detnet/current/msg00887.html">https://www.ietf.org/mail-archive/web/detnet/current/msg00887.html</a></p>
</div>
<div style="color: black;">
<p
style="color: black; font-size: 10pt; font-family: Arial, sans-serif; margin: 10pt 0;">On
January 22, 2017 5:24:17 PM &quot;Adrian Farrel&quot;
&lt;adrian@olddog.co.uk&gt; wrote:</p>
<blockquote type="cite" class="gmail_quote"
style="margin: 0 0 0 0.75ex; border-left: 1px solid #808080; padding-left: 0.75ex;">
<div class=WordSection1><p class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'>Hey
John,<o:p></o:p></span></p><p class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p
class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'>I
realise that your email was two months ago, but I don't see any responses
in the archive and so I thought I would try to understand why by re-reading
your email.<o:p></o:p></span></p><p class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p
class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'>I
think it is very probably completely unclear to everyone who is not
following Detnet exactly what you're asking for.<o:p></o:p></span></p><p
class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p
class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'>Reading
your email (and none of the Detnet documents) I am not clear whether you
plan to transport deterministic Ethernet over some as yet unspecified data
plane (which you might choose or enhance based on its capabilities),
whether you propose to map the features of the transported deterministic
Ethernet to features of the transport, whether you hope to map the features
of the deterministic Ethernet to features of the transport so that only the
data is actually transported, or what. You could, for example, use a
transport that has no scheduling and queueing support, but that is also
non-blocking.<o:p></o:p></span></p><p class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p
class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'>Indeed,
the word &quot;transport&quot; probably immediately made half of your
audience think one thing (transport network) and the other half another
thing (transport layer protocol).<o:p></o:p></span></p><p
class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p
class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'>Of
course, I went the extra mile ;-) and looked at your slide. Sadly no light
was shed.<o:p></o:p></span></p><p class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p
class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'>I
suspect the answer you're looking for is not &quot;why not use
deterministic Ethernet as your transport?&quot; and similarly &quot;have
you thought of using a photonic network?&quot;<o:p></o:p></span></p><p
class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p
class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'>Can
you better phrase your question for the audience?<o:p></o:p></span></p><p
class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><p
class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'>Thanks,<o:p></o:p></span></p><p
class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'>Adrian<o:p></o:p></span></p><p
class=MsoNormal><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";mso-bidi-font-family:"Times New Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p><div
style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm
4.0pt'><div><div style='border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN-US'>From:</span></b><span
lang=EN-US
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN-US'>
detnet [mailto:detnet-bounces@ietf.org] <b>On Behalf Of </b>John
Dowdell<br><b>Sent:</b> 15 November 2016 05:32<br><b>To:</b> teas@ietf.org;
mpls@ietf.org; detnet@ietf.org<br><b>Subject:</b> [Detnet] Help wanted in
detnet<o:p></o:p></span></p></div></div><p
class=MsoNormal><o:p>&nbsp;</o:p></p><p class=MsoNormal><span
style='mso-fareast-font-family:"Times New Roman"'>Hi all in mpls and teas
groups (consolidating earlier posting only on
mpls)<o:p></o:p></span></p><div><p class=MsoNormal><span
style='mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p></div><div><div><p
class=MsoNormal><span
style='mso-fareast-font-family:"Times New Roman"'>Over in detnet wg we are
working on transporting deterministic Ethernet (e.g. from 802.1TSN LANs)
across the wide area for applications such as industrial control and
audio/video broadcast. One of the key assumptions is that the underlying
transport already has sufficient scheduling and queueing support to allow
proper extension of time-sensitive (or even time-critical) traffic over,
for example, MPLS.<o:p></o:p></span></p></div><div><p class=MsoNormal><span
style='mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p></div><div><p
class=MsoNormal><span style='mso-fareast-font-family:"Times New Roman"'>To
help us validate that assumption, please can someone volunteer to help us?
Feel free to come over to the detnet list. Recommendations on exactly which
flavour(s) of MPLS and/or configurations and/or gotchas would be most
welcome.<o:p></o:p></span></p></div><div><p class=MsoNormal><span
style='mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p></div><div><p
class=MsoNormal><span style='mso-fareast-font-family:"Times New Roman"'>The
slides in question are here&nbsp;<a
href="https://www.ietf.org/proceedings/97/slides/slides-97-detnet-detnet-data-plane-02.pptx">https://www.ietf.org/proceedings/97/slides/slides-97-detnet-detnet-data-plane-02.pptx</a>,
slide 4.<o:p></o:p></span></p></div><div><p class=MsoNormal><span
style='mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p></div><div><p
class=MsoNormal><span
style='mso-fareast-font-family:"Times New Roman"'>Many thanks in
anticipation.<o:p></o:p></span></p></div><p class=MsoNormal><span
style='mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p><div><p
class=MsoNormal><span
style='mso-fareast-font-family:"Times New Roman"'>John<o:p></o:p></span></p></div><div><div><p
class=MsoNormal><span
style='font-size:9.0pt;font-family:"Helvetica","sans-serif";mso-fareast-font-family:"Times New Roman";color:black'><o:p>&nbsp;</o:p></span></p></div><div><p
class=MsoNormal><span
style='font-size:9.0pt;font-family:"Helvetica","sans-serif";mso-fareast-font-family:"Times New Roman";color:black'><o:p>&nbsp;</o:p></span></p></div><p
class=MsoNormal><span
style='mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p></div><p
class=MsoNormal><span
style='mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p></div></div></div>
_______________________________________________<br>
detnet mailing list<br>
<a class="aqm-autolink aqm-autowrap"
href="mailto:detnet%40ietf.org">detnet@ietf.org</a><br>
<a class="aqm-autolink aqm-autowrap"
href="https://www.ietf.org/mailman/listinfo/detnet">https://www.ietf.org/mailman/listinfo/detnet</a><br>
<br></blockquote>
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Working Group,

This is to initiate a two week working group last call on
draft-ietf-mpls-flow-ident-02.

Please send your comments to the mpls wg mailing list (mpls@ietf.org).

There were no IPR disclosures against this document.

All the authors and contributors have stated on the working group
mailing list that they are not aware of any IPRs that relates to this
document.

This working group last call ends February 6, 2017.


/Loa
for the MPLS wg chairs
-- 


Loa Andersson                        email: loa@mail01.huawei.com
Senior MPLS Expert                          loa@pi.nu
Huawei Technologies (consultant)     phone: +46 739 81 21 64


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To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, John E Drake <jdrake@juniper.net>, "Acee Lindem (acee)" <acee@cisco.com>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
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From: Stewart Bryant <stewart.bryant@gmail.com>
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Les

This is very much path related and thus it is entirely reasonable to 
carry it in the IGP.

If you want a path that gives you the highest quality time transfer, 
then you need to select a path on which every hop provides the 
information needed to minimise the uncertainly in the transit delay 
time. Thus I can see paths being chosen on the basis that every hop 
performs this service. That is obviously a routing decision and thus it 
is reasonable to advertise the information needed to make that decision 
in the routing protocol.

- Stewart


On 19/01/2017 21:08, Les Ginsberg (ginsberg) wrote:
>
> John –
>
> The text you have excerpted below was trying to say two things:
>
> 1)If you want to advertise this in the IGPs the OSPF style proposal is 
> much better from an implementation standpoint than the IS-IS GENAPP 
> proposal
>
> 2)There is a larger question as to whether we should be using the IGPs 
> for this at all
>
> Statement #1 should not be interpreted to imply that I am advocating 
> using the IGPs. J
>
> That said, we “ALWAYS” end up choosing using the IGPs to do this sort 
> of thing – not because it is the “RIGHT” thing to do architecturally – 
> but because it is so convenient.
>
> I am just asking for folks to pause and think about this a bit more 
> from an architectural perspective.
>
> Les
>
> *From:*John E Drake [mailto:jdrake@juniper.net]
> *Sent:* Thursday, January 19, 2017 12:20 PM
> *To:* Les Ginsberg (ginsberg); Acee Lindem (acee); Alexander 
> Vainshtein; Greg Mirsky
> *Cc:* Robert Sparks; mpls@ietf.org; gen-art@ietf.org; 
> draft-ietf-mpls-residence-time.all@ietf.org; ietf@ietf.org; 
> isis-chairs@ietf.org; Abhay Roy (akr)
> *Subject:* RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
> Les,
>
> Comments inline.
>
> Yours Irrespectively,
>
> John
>
> *From:*Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com]
> *Sent:* Thursday, January 19, 2017 12:25 PM
> *To:* John E Drake <jdrake@juniper.net <mailto:jdrake@juniper.net>>; 
> Acee Lindem (acee) <acee@cisco.com <mailto:acee@cisco.com>>; Alexander 
> Vainshtein <Alexander.Vainshtein@ecitele.com 
> <mailto:Alexander.Vainshtein@ecitele.com>>; Greg Mirsky 
> <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>
> *Cc:* Robert Sparks <rjsparks@nostrum.com 
> <mailto:rjsparks@nostrum.com>>; mpls@ietf.org <mailto:mpls@ietf.org>; 
> gen-art@ietf.org <mailto:gen-art@ietf.org>; 
> draft-ietf-mpls-residence-time.all@ietf.org 
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org 
> <mailto:ietf@ietf.org>; isis-chairs@ietf.org 
> <mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com 
> <mailto:akr@cisco.com>>
> *Subject:* RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
> John –
>
> For me, this raises the age-old question of when it is/is not 
> appropriate to use IGPs for flooding information.
>
> This is clearly not TE information – you just happen to be using this 
> in conjunction with MPLS – but it is a generic capability. I do not 
> see the IGPs as the appropriate mechanism to flood generic interface 
> capabilities. It also, as Acee has pointed out, results in flooding 
> information to all nodes in the domain when only a few care about it.
>
> *//*
>
> */[JD] RTM support as defined in the draft would be used to provide 
> extremely accurate time synchronization in an MPLS network so I would 
> suggest that all nodes in such a network would be using it and hence 
> that it does belong in the IGP.  As an aside, advertising it in the 
> IGP facilitates incremental or partial deployment.  Your yesterday’s 
> email supports this: /*
>
> *//*
>
> */“It would seem more appropriate to treat RTM information either as:/*
>
> *//*
>
> */o an extension to link attribute information already advertised by 
> the IGPs (as has been suggested for OSPF) - which would suggest in 
> IS-IS a sub-TLV of TLV 22(et al)/*
>
> *//*
>
> */or/*
>
> *//*
>
> ·*/As an interface attribute independent of routing protocols which 
> could be retrieved utilizing network management tools”/*
>
> Les
>
> *From:*John E Drake [mailto:jdrake@juniper.net]
> *Sent:* Thursday, January 19, 2017 8:54 AM
> *To:* Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les 
> Ginsberg (ginsberg)
> *Cc:* Robert Sparks; mpls@ietf.org <mailto:mpls@ietf.org>; 
> gen-art@ietf.org <mailto:gen-art@ietf.org>; 
> draft-ietf-mpls-residence-time.all@ietf.org 
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org 
> <mailto:ietf@ietf.org>; isis-chairs@ietf.org 
> <mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
> *Subject:* RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
> Acee,
>
> Relying on an omniscient controller is a non-starter in general and in 
> particular because the protocol by which it would learn each node’s 
> RTM capabilities and distribute them to the other nodes is undefined. 
> Further, one of the ways by which an omniscient controller learns a 
> node’s capabilities is by snooping the link/state database.
>
> Yours Irrespectively,
>
> John
>
> *From:*Acee Lindem (acee) [mailto:acee@cisco.com]
> *Sent:* Thursday, January 19, 2017 11:47 AM
> *To:* John E Drake <jdrake@juniper.net <mailto:jdrake@juniper.net>>; 
> Alexander Vainshtein <Alexander.Vainshtein@ecitele.com 
> <mailto:Alexander.Vainshtein@ecitele.com>>; Greg Mirsky 
> <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>; Les Ginsberg 
> (ginsberg) <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
> *Cc:* Robert Sparks <rjsparks@nostrum.com 
> <mailto:rjsparks@nostrum.com>>; mpls@ietf.org <mailto:mpls@ietf.org>; 
> gen-art@ietf.org <mailto:gen-art@ietf.org>; 
> draft-ietf-mpls-residence-time.all@ietf.org 
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org 
> <mailto:ietf@ietf.org>; isis-chairs@ietf.org 
> <mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com 
> <mailto:akr@cisco.com>>
> *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
> Hi John,
>
> *From: *John E Drake <jdrake@juniper.net <mailto:jdrake@juniper.net>>
> *Date: *Thursday, January 19, 2017 at 10:43 AM
> *To: *Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>, Alexander 
> Vainshtein <Alexander.Vainshtein@ecitele.com 
> <mailto:Alexander.Vainshtein@ecitele.com>>, Greg Mirsky 
> <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>, "Les Ginsberg 
> (ginsberg)" <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
> *Cc: *Robert Sparks <rjsparks@nostrum.com 
> <mailto:rjsparks@nostrum.com>>, "mpls@ietf.org <mailto:mpls@ietf.org>" 
> <mpls@ietf.org <mailto:mpls@ietf.org>>, "gen-art@ietf.org 
> <mailto:gen-art@ietf.org>" <gen-art@ietf.org 
> <mailto:gen-art@ietf.org>>, 
> "draft-ietf-mpls-residence-time.all@ietf.org 
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>" 
> <draft-ietf-mpls-residence-time.all@ietf.org 
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org 
> <mailto:ietf@ietf.org>" <ietf@ietf.org <mailto:ietf@ietf.org>>, 
> "isis-chairs@ietf.org <mailto:isis-chairs@ietf.org>" 
> <isis-chairs@ietf.org <mailto:isis-chairs@ietf.org>>, "Abhay Roy 
> (akr)" <akr@cisco.com <mailto:akr@cisco.com>>
> *Subject: *RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>     Acee,
>
>     We discussed all of this with you over a year ago and used your
>     guidance in adding the indication of RTM capability to OSPF.
>
> I’m sorry but I focused mainly on the OSPF protocol aspects then and 
> didn’t question the use case. This question came up in the IS-IS WG 
> discussions.
>
> Thanks,
>
> Acee
>
>     Yours Irrespectively,
>
>     John
>
>     *From:*Acee Lindem (acee) [mailto:acee@cisco.com]
>     *Sent:* Thursday, January 19, 2017 11:38 AM
>     *To:* Alexander Vainshtein <Alexander.Vainshtein@ecitele.com
>     <mailto:Alexander.Vainshtein@ecitele.com>>; Greg Mirsky
>     <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>; Les
>     Ginsberg (ginsberg) <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
>     *Cc:* Robert Sparks <rjsparks@nostrum.com
>     <mailto:rjsparks@nostrum.com>>; mpls@ietf.org
>     <mailto:mpls@ietf.org>; gen-art@ietf.org
>     <mailto:gen-art@ietf.org>;
>     draft-ietf-mpls-residence-time.all@ietf.org
>     <mailto:draft-ietf-mpls-residence-time.all@ietf.org>;
>     ietf@ietf.org <mailto:ietf@ietf.org>; isis-chairs@ietf.org
>     <mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com
>     <mailto:akr@cisco.com>>
>     *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>     I guess what we were trying to envision the use case and whether
>     it makes sense for all the nodes in the IGP routing domain to have
>     this information. Would the LSP ingress LSR only need to if the
>     egress LSR supports RTM and it is best effort recording for
>     transit LSRs in the path?
>
>     Additionally, if it is needed in the IGPs, should there also be a
>     BGP-LS Link Attribute TLV proposed?
>
>     Thanks,
>
>     Acee
>
>     *From: *Alexander Vainshtein <Alexander.Vainshtein@ecitele.com
>     <mailto:Alexander.Vainshtein@ecitele.com>>
>     *Date: *Thursday, January 19, 2017 at 10:15 AM
>     *To: *Greg Mirsky <gregimirsky@gmail.com
>     <mailto:gregimirsky@gmail.com>>, "Les Ginsberg (ginsberg)"
>     <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
>     *Cc: *Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>, Robert
>     Sparks <rjsparks@nostrum.com <mailto:rjsparks@nostrum.com>>,
>     "mpls@ietf.org <mailto:mpls@ietf.org>" <mpls@ietf.org
>     <mailto:mpls@ietf.org>>, "gen-art@ietf.org
>     <mailto:gen-art@ietf.org>" <gen-art@ietf.org
>     <mailto:gen-art@ietf.org>>,
>     "draft-ietf-mpls-residence-time.all@ietf.org
>     <mailto:draft-ietf-mpls-residence-time.all@ietf.org>"
>     <draft-ietf-mpls-residence-time.all@ietf.org
>     <mailto:draft-ietf-mpls-residence-time.all@ietf.org>>,
>     "ietf@ietf.org <mailto:ietf@ietf.org>" <ietf@ietf.org
>     <mailto:ietf@ietf.org>>, "isis-chairs@ietf.org
>     <mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org
>     <mailto:isis-chairs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com
>     <mailto:akr@cisco.com>>
>     *Subject: *RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>         Hi all,
>
>         I concur with Greg: from my POV an interoperable solution
>         should not depend on an omniscient NMS client distributing
>         information about capabilities of each node to each other node.
>
>         Regards,
>
>         Sasha
>
>         Office: +972-39266302
>
>         Cell: +972-549266302
>
>         Email: Alexander.Vainshtein@ecitele.com
>         <mailto:Alexander.Vainshtein@ecitele.com>
>
>         *From:*Greg Mirsky [mailto:gregimirsky@gmail.com]
>         *Sent:* Thursday, January 19, 2017 6:01 PM
>         *To:* Les Ginsberg (ginsberg) <ginsberg@cisco.com
>         <mailto:ginsberg@cisco.com>>
>         *Cc:* Acee Lindem (acee) <acee@cisco.com
>         <mailto:acee@cisco.com>>; Robert Sparks <rjsparks@nostrum.com
>         <mailto:rjsparks@nostrum.com>>; mpls@ietf.org
>         <mailto:mpls@ietf.org>; gen-art@ietf.org
>         <mailto:gen-art@ietf.org>;
>         draft-ietf-mpls-residence-time.all@ietf.org
>         <mailto:draft-ietf-mpls-residence-time.all@ietf.org>;
>         ietf@ietf.org <mailto:ietf@ietf.org>; isis-chairs@ietf.org
>         <mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com
>         <mailto:akr@cisco.com>>
>         *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>         Hi Les,
>
>         I believe that IGP extensions to advertise RTM capability are
>         required.
>
>         Regards,
>
>         Greg
>
>         On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg)
>         <ginsberg@cisco.com <mailto:ginsberg@cisco.com>> wrote:
>
>             Greg –
>
>             I am having trouble understanding your response.
>
>             The question we are raising is whether we should extend
>             the IGPs to support advertising RTM capability – an
>             alternative being to retrieve the capability via network
>             management.
>
>             Saying that the IGP functionality is optional and/or
>             wouldn’t always be advertised doesn’t really answer the
>             question of whether we should or should not define the IGP
>             extensions.
>
>             Could you respond more directly to this point?
>
>             Les
>
>             *From:*Greg Mirsky [mailto:gregimirsky@gmail.com
>             <mailto:gregimirsky@gmail.com>]
>             *Sent:* Thursday, January 19, 2017 7:44 AM
>             *To:* Acee Lindem (acee)
>             *Cc:* Robert Sparks; mpls@ietf.org <mailto:mpls@ietf.org>;
>             gen-art@ietf.org <mailto:gen-art@ietf.org>;
>             draft-ietf-mpls-residence-time.all@ietf.org
>             <mailto:draft-ietf-mpls-residence-time.all@ietf.org>;
>             ietf@ietf.org <mailto:ietf@ietf.org>; Les Ginsberg
>             (ginsberg); isis-chairs@ietf.org
>             <mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
>
>
>             *Subject:* Re: [mpls] Review of
>             draft-ietf-mpls-residence-time-12
>
>             Hi Acee,
>
>             the draft defines optional functionality. If an operator
>             has no use neither for PTP's Transparent Clock, nor RTM
>             itself as performance metric, then RTM sub-TLV would not
>             be included and thus it would not be flooded. Of course,
>             it be right to reflect RTM capability through YANG data
>             model, thus allowing SDN scenario you've described.
>
>             Regards,
>
>             Greg
>
>             On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee)
>             <acee@cisco.com <mailto:acee@cisco.com>> wrote:
>
>             Hi Greg,
>
>             Although it is a bit late, we’ve had some discussions
>             amongst the IS-IS and OSPF chairs and are wondering
>             whether the interface capability belongs in the IGPs. This
>             will be flooded throughout the entire routing domain – is
>             it really needed on every node or will it the RTM testing
>             be initiated from an omniscient NMS client that would know
>             the capabilities of each node or easily query them using
>             YANG?
>
>             Thanks,
>
>             Acee
>
>             *From: *mpls <mpls-bounces@ietf.org
>             <mailto:mpls-bounces@ietf.org>> on behalf of Greg Mirsky
>             <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>
>             *Date: *Wednesday, January 18, 2017 at 1:25 PM
>             *To: *Robert Sparks <rjsparks@nostrum.com
>             <mailto:rjsparks@nostrum.com>>
>             *Cc: *"mpls@ietf.org <mailto:mpls@ietf.org>"
>             <mpls@ietf.org <mailto:mpls@ietf.org>>, "gen-art@ietf.org
>             <mailto:gen-art@ietf.org>" <gen-art@ietf.org
>             <mailto:gen-art@ietf.org>>,
>             "draft-ietf-mpls-residence-time.all@ietf.org
>             <mailto:draft-ietf-mpls-residence-time.all@ietf.org>"
>             <draft-ietf-mpls-residence-time.all@ietf.org
>             <mailto:draft-ietf-mpls-residence-time.all@ietf.org>>,
>             "ietf@ietf.org <mailto:ietf@ietf.org>" <ietf@ietf.org
>             <mailto:ietf@ietf.org>>
>             *Subject: *Re: [mpls] Review of
>             draft-ietf-mpls-residence-time-12
>
>                 Hi Robert,
>
>                 thank you for the most expedient review and comments.
>                 I'll make changes in Section 2 per your suggestion.
>
>                 Regards,
>
>                 Greg
>
>                 On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks
>                 <rjsparks@nostrum.com <mailto:rjsparks@nostrum.com>>
>                 wrote:
>
>                 The changes all look good.
>
>                 I still think you should say something in the document
>                 about what "the time of packet arrival" and
>                 "transmission" means, and call out the point you made
>                 about being careful to not introduce apparent jitter
>                 by not making those measurements consistently. (The
>                 definitions you point to in your earlier mail from
>                 G.8013 don't really help - they just say "time of
>                 packet arrival". Again, the first and last bit are
>                 likely to be several nanoseconds apart so I think it
>                 matters. Perhaps you're saying it doesn't matter as
>                 long as each node is consistent (there will be error
>                 in the residence time measurement, but it will be
>                 constant at each node, so the sum of errors will be
>                 constant, and the clocks will be ok?)
>
>                 Please look at the new first paragraph of section 2 -
>                 there's a mix of "as case" and "in case" that should
>                 be made consistent. I suspect it would be easiest to
>                 simply say "referred to as using a one-step clock" and
>                 "referred to as using a two-step clock" or similar.
>
>                 RjS
>
>                 On 1/18/17 12:03 PM, Greg Mirsky wrote:
>
>                     Hi Robert,
>
>                     Sasha Vainshtein came with elegant idea to address
>                     disconnection between discussion of one-step and
>                     two-step modes that you've pointed out. We've
>                     moved Section 7 as sub-section into Section 2 now.
>                     Attached are updated diff and the proposed new
>                     version -13.
>
>                     Regards,
>
>                     Greg
>
>                     On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky
>                     <gregimirsky@gmail.com
>                     <mailto:gregimirsky@gmail.com>> wrote:
>
>                     Hi Robert,
>
>                     once again, thank you for your thorough review and
>                     the most detailed comments. I've prepared updated
>                     version and would greatly appreciate if you review
>                     the changes and let us know whether your comments
>                     been addressed. Attached are diff and the new version.
>
>                     Regards,
>
>                     Greg
>
>                     On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks
>                     <rjsparks@nostrum.com
>                     <mailto:rjsparks@nostrum.com>> wrote:
>
>                         Reviewer: Robert Sparks
>                         Review result: Ready with Nits
>
>                         I am the assigned Gen-ART reviewer for this
>                         draft. The General Area
>                         Review Team (Gen-ART) reviews all IETF
>                         documents being processed
>                         by the IESG for the IETF Chair.  Please treat
>                         these comments just
>                         like any other last call comments.
>
>                         For more information, please see the FAQ at
>                         <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
>
>                         Document: draft-ietf-mpls-residence-time-12
>                         Reviewer: Robert Sparks
>                         Review Date: 2017-01-10
>                         IETF LC End Date: 2017-01-17
>                         IESG Telechat date: 2017-02-02
>
>                         Summary: Ready (with nits) for publication as
>                         a Proposed Standard
>
>                         I have two primary comments. I expect both are
>                         rooted in the authors
>                         and working group knowing what the document
>                         means instead of seeing
>                         what
>                         it says or doesn't say:
>
>                         1) The document is loose with its use of
>                         'packet', and where TTLs
>                         appear when
>                         they are discussed. It might be helpful to
>                         rephrase the text that
>                         speaks
>                         of RTM packets in terms of RTM messages that
>                         are encoded as G-ACh
>                         messages and
>                         not refer to packets unless you mean the whole
>                         encapsulated packet
>                         with MPLS
>                         header, ACH, and G-ACh message.
>
>                         2) Since this new mechanic speaks in terms of
>                         fractional nanoseconds,
>                         some
>                         discussion of what trigger-point you intend
>                         people to use for taking
>                         the
>                         precise time of a packet's arrival or
>                         departure seems warranted. (The
>                         first and
>                         last bit of the whole encapsulated packet
>                         above are going to appear at
>                         the
>                         physical layer many nanoseconds apart at OC192
>                         speeds if I've done the
>                         math
>                         right). It may be obvious to the folks
>                         discussing this, but it's not
>                         obvious
>                         from the document.  If it's _not_ obvious and
>                         variation in technique
>                         is
>                         expected, then some discussion about issues
>                         that might arise from
>                         different
>                         implementation choices would be welcome.
>
>                         The rest of these are editorial nits:
>
>                         It would help to pull an overview description
>                         of the difference
>                         between
>                         one-step and two-step much earlier in the
>                         document. I suggest in the
>                         overview
>                         in section 2. Otherwise, the reader really has
>                         to jump forward and
>                         read section
>                         7 before section 3's 5th bullet makes any sense.
>
>                         In section 3, "IANA will be asked" should be
>                         made active. Say "This
>                         document
>                         asks IANA to" and point to the IANA
>                         consideration section. Apply
>                         similar
>                         treatment to the other places where you talk
>                         about future IANA
>                         actions.
>
>                         There are several places where there are
>                         missing words (typically
>                         articles or
>                         prepositions). You're less likely to end up
>                         with misinterpretations
>                         during the
>                         RFC Editor phase if you provide them before
>                         the document gets that far
>                         in the
>                         process. The spots I found most disruptive
>                         were these (this is not
>                         intended to
>                         be exhaustive):
>
>                           Section 3: "set 1 according" -> "set to 1
>                         according"
>                           Section 3: "the Table 19 [IEEE..." -> "Table
>                         19 of [IEEE..."
>                           Section 4.2: "Detailed discussion of ...
>                         modes in Section 7."
>                         -> "Detailed discussion of ... modes appears
>                         in Section 7."
>                           Section 10: "most of" -> "most of all"
>
>                         In Setion 3.1 at "identity of the source
>                         port", please point into the
>                         document
>                         that defines this identity and its
>                         representation. I suspect this is a
>                         pointer
>                         into a specific section in IEEE.1588.2008].
>


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    <p><br>
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    <p>Les</p>
    <p>This is very much path related and thus it is entirely reasonable
      to carry it in the IGP.</p>
    <p>If you want a path that gives you the highest quality time
      transfer, then you need to select a path on which every hop
      provides the information needed to minimise the uncertainly in the
      transit delay time. Thus I can see paths being chosen on the basis
      that every hop performs this service. That is obviously a routing
      decision and thus it is reasonable to advertise the information
      needed to make that decision in the routing protocol.</p>
    <p>- Stewart<br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 19/01/2017 21:08, Les Ginsberg
      (ginsberg) wrote:<br>
    </div>
    <blockquote
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      <div class="WordSection1">
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">John
            –<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">The
            text you have excerpted below was trying to say two things:<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">1)If
            you want to advertise this in the IGPs the OSPF style
            proposal is much better from an implementation standpoint
            than the IS-IS GENAPP proposal<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">2)There
            is a larger question as to whether we should be using the
            IGPs for this at all<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Statement
            #1 should not be interpreted to imply that I am advocating
            using the IGPs.
          </span><span
            style="font-size:11.0pt;font-family:Wingdings;color:#1F497D">J</span><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">That
            said, we “ALWAYS” end up choosing using the IGPs to do this
            sort of thing – not because it is the “RIGHT” thing to do
            architecturally – but because it is so convenient.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">I
            am just asking for folks to pause and think about this a bit
            more from an architectural perspective.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">  
            Les<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
        <div style="border:none;border-left:solid blue 1.5pt;padding:0in
          0in 0in 4.0pt">
          <div>
            <div style="border:none;border-top:solid #B5C4DF
              1.0pt;padding:3.0pt 0in 0in 0in">
              <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">
                  John E Drake [<a class="moz-txt-link-freetext" href="mailto:jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
                  <br>
                  <b>Sent:</b> Thursday, January 19, 2017 12:20 PM<br>
                  <b>To:</b> Les Ginsberg (ginsberg); Acee Lindem
                  (acee); Alexander Vainshtein; Greg Mirsky<br>
                  <b>Cc:</b> Robert Sparks; <a class="moz-txt-link-abbreviated" href="mailto:mpls@ietf.org">mpls@ietf.org</a>;
                  <a class="moz-txt-link-abbreviated" href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>;
                  <a class="moz-txt-link-abbreviated" href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>;
                  <a class="moz-txt-link-abbreviated" href="mailto:ietf@ietf.org">ietf@ietf.org</a>; <a class="moz-txt-link-abbreviated" href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy (akr)<br>
                  <b>Subject:</b> RE: [mpls] Review of
                  draft-ietf-mpls-residence-time-12<o:p></o:p></span></p>
            </div>
          </div>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Les,<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Comments
              inline.
              <o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
          <div>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours
                Irrespectively,<o:p></o:p></span></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">John<o:p></o:p></span></p>
          </div>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
          <div style="border:none;border-left:solid blue
            1.5pt;padding:0in 0in 0in 4.0pt">
            <div>
              <div style="border:none;border-top:solid #E1E1E1
                1.0pt;padding:3.0pt 0in 0in 0in">
                <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;">
                    Les Ginsberg (ginsberg) [<a moz-do-not-send="true"
                      href="mailto:ginsberg@cisco.com">mailto:ginsberg@cisco.com</a>]
                    <br>
                    <b>Sent:</b> Thursday, January 19, 2017 12:25 PM<br>
                    <b>To:</b> John E Drake &lt;<a
                      moz-do-not-send="true"
                      href="mailto:jdrake@juniper.net">jdrake@juniper.net</a>&gt;;
                    Acee Lindem (acee) &lt;<a moz-do-not-send="true"
                      href="mailto:acee@cisco.com">acee@cisco.com</a>&gt;;
                    Alexander Vainshtein &lt;<a moz-do-not-send="true"
                      href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
                    Greg Mirsky &lt;<a moz-do-not-send="true"
                      href="mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;<br>
                    <b>Cc:</b> Robert Sparks &lt;<a
                      moz-do-not-send="true"
                      href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;;
                    <a moz-do-not-send="true"
                      href="mailto:mpls@ietf.org">mpls@ietf.org</a>; <a
                      moz-do-not-send="true"
                      href="mailto:gen-art@ietf.org">
                      gen-art@ietf.org</a>; <a moz-do-not-send="true"
                      href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">
                      draft-ietf-mpls-residence-time.all@ietf.org</a>; <a
                      moz-do-not-send="true" href="mailto:ietf@ietf.org">ietf@ietf.org</a>;
                    <a moz-do-not-send="true"
                      href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>;
                    Abhay Roy (akr) &lt;<a moz-do-not-send="true"
                      href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
                    <b>Subject:</b> RE: [mpls] Review of
                    draft-ietf-mpls-residence-time-12<o:p></o:p></span></p>
              </div>
            </div>
            <p class="MsoNormal"><o:p> </o:p></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">John
                –<o:p></o:p></span></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">For
                me, this raises the age-old question of when it is/is
                not appropriate to use IGPs for flooding information.<o:p></o:p></span></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">This
                is clearly not TE information – you just happen to be
                using this in conjunction with MPLS – but it is a
                generic capability. I do not see the IGPs as the
                appropriate mechanism to flood generic interface
                capabilities. It also, as Acee has pointed out, results
                in flooding information to all nodes in the domain when
                only a few care about it.<o:p></o:p></span></p>
            <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></i></b></p>
            <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">[JD] 
                    RTM support as defined in the draft would be used to
                    provide extremely accurate time synchronization in
                    an MPLS network so I would suggest that all nodes in
                    such a network would be using it and hence that it
                    does belong in the IGP.  As an aside, advertising it
                    in the IGP facilitates incremental or partial
                    deployment.  Your yesterday’s email supports this: 
                    <o:p></o:p></span></i></b></p>
            <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></i></b></p>
            <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">“It
                    would seem more appropriate to treat RTM information
                    either as:<o:p></o:p></span></i></b></p>
            <p class="MsoNormal" style="margin-left:4.8pt"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></i></b></p>
            <p class="MsoNormal" style="margin-left:4.8pt"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">  
                    o an extension to link attribute information already
                    advertised by the IGPs (as has been suggested for
                    OSPF) - which would suggest in IS-IS a sub-TLV of
                    TLV 22(et al)<o:p></o:p></span></i></b></p>
            <p class="MsoNormal" style="margin-left:4.8pt"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></i></b></p>
            <p class="MsoNormal"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">or<o:p></o:p></span></i></b></p>
            <p class="MsoNormal" style="margin-left:4.8pt"><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></i></b></p>
            <p class="MsoListParagraph"
              style="margin-left:27.6pt;text-indent:-.25in"><span
                style="font-size:11.0pt;font-family:Symbol;color:#1F497D">·</span><span
                style="font-size:7.0pt;color:#1F497D">       
              </span><b><i><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">As
                    an interface attribute independent of routing
                    protocols which could be retrieved utilizing network
                    management tools”<o:p></o:p></span></i></b></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">  
                Les<o:p></o:p></span></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
            <div style="border:none;border-left:solid blue
              1.5pt;padding:0in 0in 0in 4.0pt">
              <div>
                <div style="border:none;border-top:solid #B5C4DF
                  1.0pt;padding:3.0pt 0in 0in 0in">
                  <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">
                      John E Drake [<a moz-do-not-send="true"
                        href="mailto:jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
                      <br>
                      <b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
                      <b>To:</b> Acee Lindem (acee); Alexander
                      Vainshtein; Greg Mirsky; Les Ginsberg (ginsberg)<br>
                      <b>Cc:</b> Robert Sparks; <a
                        moz-do-not-send="true"
                        href="mailto:mpls@ietf.org">mpls@ietf.org</a>; <a
                        moz-do-not-send="true"
                        href="mailto:gen-art@ietf.org">
                        gen-art@ietf.org</a>; <a moz-do-not-send="true"
href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">
                        draft-ietf-mpls-residence-time.all@ietf.org</a>;
                      <a moz-do-not-send="true"
                        href="mailto:ietf@ietf.org">ietf@ietf.org</a>;
                      <a moz-do-not-send="true"
                        href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>;
                      Abhay Roy (akr)<br>
                      <b>Subject:</b> RE: [mpls] Review of
                      draft-ietf-mpls-residence-time-12<o:p></o:p></span></p>
                </div>
              </div>
              <p class="MsoNormal"><o:p> </o:p></p>
              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Acee,<o:p></o:p></span></p>
              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Relying
                  on an omniscient controller is a non-starter in
                  general and in particular because the protocol by
                  which it would learn each node’s RTM capabilities and
                  distribute them to the other nodes is undefined. 
                  Further, one of the ways by which an omniscient
                  controller learns a node’s capabilities is by snooping
                  the link/state database.<o:p></o:p></span></p>
              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
              <div>
                <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours
                    Irrespectively,<o:p></o:p></span></p>
                <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
                <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">John<o:p></o:p></span></p>
              </div>
              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p> </o:p></span></p>
              <div style="border:none;border-left:solid blue
                1.5pt;padding:0in 0in 0in 4.0pt">
                <div>
                  <div style="border:none;border-top:solid #E1E1E1
                    1.0pt;padding:3.0pt 0in 0in 0in">
                    <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;">
                        Acee Lindem (acee) [<a moz-do-not-send="true"
                          href="mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
                        <br>
                        <b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
                        <b>To:</b> John E Drake &lt;<a
                          moz-do-not-send="true"
                          href="mailto:jdrake@juniper.net">jdrake@juniper.net</a>&gt;;
                        Alexander Vainshtein &lt;<a
                          moz-do-not-send="true"
                          href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
                        Greg Mirsky &lt;<a moz-do-not-send="true"
                          href="mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
                        Les Ginsberg (ginsberg) &lt;<a
                          moz-do-not-send="true"
                          href="mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
                        <b>Cc:</b> Robert Sparks &lt;<a
                          moz-do-not-send="true"
                          href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;;
                        <a moz-do-not-send="true"
                          href="mailto:mpls@ietf.org">mpls@ietf.org</a>;
                        <a moz-do-not-send="true"
                          href="mailto:gen-art@ietf.org">
                          gen-art@ietf.org</a>; <a
                          moz-do-not-send="true"
                          href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">
                          draft-ietf-mpls-residence-time.all@ietf.org</a>;
                        <a moz-do-not-send="true"
                          href="mailto:ietf@ietf.org">ietf@ietf.org</a>;
                        <a moz-do-not-send="true"
                          href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>;
                        Abhay Roy (akr) &lt;<a moz-do-not-send="true"
                          href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
                        <b>Subject:</b> Re: [mpls] Review of
                        draft-ietf-mpls-residence-time-12<o:p></o:p></span></p>
                  </div>
                </div>
                <p class="MsoNormal"><o:p> </o:p></p>
                <div>
                  <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Hi
                      John, <o:p></o:p></span></p>
                </div>
                <div>
                  <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p> </o:p></span></p>
                </div>
                <div style="border:none;border-top:solid #B5C4DF
                  1.0pt;padding:3.0pt 0in 0in 0in">
                  <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
                      </span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">John
                      E Drake &lt;<a moz-do-not-send="true"
                        href="mailto:jdrake@juniper.net">jdrake@juniper.net</a>&gt;<br>
                      <b>Date: </b>Thursday, January 19, 2017 at 10:43
                      AM<br>
                      <b>To: </b>Acee Lindem &lt;<a
                        moz-do-not-send="true"
                        href="mailto:acee@cisco.com">acee@cisco.com</a>&gt;,
                      Alexander Vainshtein &lt;<a moz-do-not-send="true"
                        href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;,
                      Greg Mirsky &lt;<a moz-do-not-send="true"
                        href="mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
                      "Les Ginsberg (ginsberg)" &lt;<a
                        moz-do-not-send="true"
                        href="mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
                      <b>Cc: </b>Robert Sparks &lt;<a
                        moz-do-not-send="true"
                        href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;,
                      "<a moz-do-not-send="true"
                        href="mailto:mpls@ietf.org">mpls@ietf.org</a>"
                      &lt;<a moz-do-not-send="true"
                        href="mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
                      "<a moz-do-not-send="true"
                        href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>"
                      &lt;<a moz-do-not-send="true"
                        href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
                      "<a moz-do-not-send="true"
                        href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>"
                      &lt;<a moz-do-not-send="true"
                        href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;,
                      "<a moz-do-not-send="true"
                        href="mailto:ietf@ietf.org">ietf@ietf.org</a>"
                      &lt;<a moz-do-not-send="true"
                        href="mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;,
                      "<a moz-do-not-send="true"
                        href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>"
                      &lt;<a moz-do-not-send="true"
                        href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;,
                      "Abhay Roy (akr)" &lt;<a moz-do-not-send="true"
                        href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
                      <b>Subject: </b>RE: [mpls] Review of
                      draft-ietf-mpls-residence-time-12<o:p></o:p></span></p>
                </div>
                <div>
                  <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p> </o:p></span></p>
                </div>
                <blockquote style="border:none;border-left:solid #B5C4DF
                  4.5pt;padding:0in 0in 0in
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt"
                  id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
                  <div>
                    <div>
                      <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Acee,</span><span
                          style="color:black"><o:p></o:p></span></p>
                      <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> </span><span
                          style="color:black"><o:p></o:p></span></p>
                      <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">We
                          discussed all of this with you over a year ago
                          and used your guidance in adding the
                          indication of RTM capability to OSPF.</span><span
                          style="color:black"><o:p></o:p></span></p>
                    </div>
                  </div>
                </blockquote>
                <div>
                  <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p> </o:p></span></p>
                </div>
                <div>
                  <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">I’m
                      sorry but I focused mainly on the OSPF protocol
                      aspects then and didn’t question the use case.
                      This question came up in the IS-IS WG
                      discussions. <o:p></o:p></span></p>
                </div>
                <div>
                  <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p> </o:p></span></p>
                </div>
                <div>
                  <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Thanks,<o:p></o:p></span></p>
                </div>
                <div>
                  <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Acee<o:p></o:p></span></p>
                </div>
                <div>
                  <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p> </o:p></span></p>
                </div>
                <blockquote style="border:none;border-left:solid #B5C4DF
                  4.5pt;padding:0in 0in 0in
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt"
                  id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
                  <div>
                    <div>
                      <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> </span><span
                          style="color:black"><o:p></o:p></span></p>
                      <div>
                        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Yours
                            Irrespectively,</span><span
                            style="color:black"><o:p></o:p></span></p>
                        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> </span><span
                            style="color:black"><o:p></o:p></span></p>
                        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">John</span><span
                            style="color:black"><o:p></o:p></span></p>
                      </div>
                      <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> </span><span
                          style="color:black"><o:p></o:p></span></p>
                      <div style="border:none;border-left:solid blue
                        1.5pt;padding:0in 0in 0in 4.0pt">
                        <div>
                          <div style="border:none;border-top:solid
                            #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
                            <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">
                                Acee Lindem (acee) [<a
                                  moz-do-not-send="true"
                                  href="mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
                                <br>
                                <b>Sent:</b> Thursday, January 19, 2017
                                11:38 AM<br>
                                <b>To:</b> Alexander Vainshtein &lt;<a
                                  moz-do-not-send="true"
                                  href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
                                Greg Mirsky &lt;<a
                                  moz-do-not-send="true"
                                  href="mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
                                Les Ginsberg (ginsberg) &lt;<a
                                  moz-do-not-send="true"
                                  href="mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
                                <b>Cc:</b> Robert Sparks &lt;<a
                                  moz-do-not-send="true"
                                  href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;;
                                <a moz-do-not-send="true"
                                  href="mailto:mpls@ietf.org">mpls@ietf.org</a>;
                                <a moz-do-not-send="true"
                                  href="mailto:gen-art@ietf.org">
                                  gen-art@ietf.org</a>; <a
                                  moz-do-not-send="true"
                                  href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a
                                  moz-do-not-send="true"
                                  href="mailto:ietf@ietf.org">ietf@ietf.org</a>;
                                <a moz-do-not-send="true"
                                  href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>;
                                Abhay Roy (akr) &lt;<a
                                  moz-do-not-send="true"
                                  href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
                                <b>Subject:</b> Re: [mpls] Review of
                                draft-ietf-mpls-residence-time-12</span><span
                                style="color:black"><o:p></o:p></span></p>
                          </div>
                        </div>
                        <p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
                        <div>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">I
                              guess what we were trying to envision the
                              use case and whether it makes sense for
                              all the nodes in the IGP routing domain to
                              have this information. Would the LSP
                              ingress LSR only need to if the egress LSR
                              supports RTM and it is best effort
                              recording for transit LSRs in the path?  </span><span
                              style="color:black"><o:p></o:p></span></p>
                        </div>
                        <div>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
                              style="color:black"><o:p></o:p></span></p>
                        </div>
                        <div>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Additionally,
                              if it is needed in the IGPs, should there
                              also be a BGP-LS Link Attribute TLV
                              proposed? </span><span style="color:black"><o:p></o:p></span></p>
                        </div>
                        <div>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
                              style="color:black"><o:p></o:p></span></p>
                        </div>
                        <div>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Thanks,</span><span
                              style="color:black"><o:p></o:p></span></p>
                        </div>
                        <div>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Acee </span><span
                              style="color:black"><o:p></o:p></span></p>
                        </div>
                        <div>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
                              style="color:black"><o:p></o:p></span></p>
                        </div>
                        <div style="border:none;border-top:solid #B5C4DF
                          1.0pt;padding:3.0pt 0in 0in 0in">
                          <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
                              </span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Alexander
                              Vainshtein &lt;<a moz-do-not-send="true"
                                href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;<br>
                              <b>Date: </b>Thursday, January 19, 2017
                              at 10:15 AM<br>
                              <b>To: </b>Greg Mirsky &lt;<a
                                moz-do-not-send="true"
                                href="mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
                              "Les Ginsberg (ginsberg)" &lt;<a
                                moz-do-not-send="true"
                                href="mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
                              <b>Cc: </b>Acee Lindem &lt;<a
                                moz-do-not-send="true"
                                href="mailto:acee@cisco.com">acee@cisco.com</a>&gt;,
                              Robert Sparks &lt;<a
                                moz-do-not-send="true"
                                href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;,
                              "<a moz-do-not-send="true"
                                href="mailto:mpls@ietf.org">mpls@ietf.org</a>"
                              &lt;<a moz-do-not-send="true"
                                href="mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
                              "<a moz-do-not-send="true"
                                href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>"
                              &lt;<a moz-do-not-send="true"
                                href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
                              "<a moz-do-not-send="true"
                                href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>"
                              &lt;<a moz-do-not-send="true"
                                href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;,
                              "<a moz-do-not-send="true"
                                href="mailto:ietf@ietf.org">ietf@ietf.org</a>"
                              &lt;<a moz-do-not-send="true"
                                href="mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;,
                              "<a moz-do-not-send="true"
                                href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>"
                              &lt;<a moz-do-not-send="true"
                                href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;,
                              "Abhay Roy (akr)" &lt;<a
                                moz-do-not-send="true"
                                href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
                              <b>Subject: </b>RE: [mpls] Review of
                              draft-ietf-mpls-residence-time-12</span><span
                              style="color:black"><o:p></o:p></span></p>
                        </div>
                        <div>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
                              style="color:black"><o:p></o:p></span></p>
                        </div>
                        <blockquote style="border:none;border-left:solid
                          #B5C4DF 4.5pt;padding:0in 0in 0in
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt"
                          id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
                          <div>
                            <div>
                              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#44546A">Hi
                                  all,</span><span style="color:black"><o:p></o:p></span></p>
                              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#44546A">I
                                  concur with Greg: from my POV an
                                  interoperable solution should not
                                  depend on an omniscient NMS client
                                  distributing information about
                                  capabilities of each node to each
                                  other node. </span><span
                                  style="color:black"><o:p></o:p></span></p>
                              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#44546A"> </span><span
                                  style="color:black"><o:p></o:p></span></p>
                              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#44546A"> </span><span
                                  style="color:black"><o:p></o:p></span></p>
                              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#44546A">Regards,</span><span
                                  style="color:black"><o:p></o:p></span></p>
                              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#44546A">Sasha</span><span
                                  style="color:black"><o:p></o:p></span></p>
                              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#44546A"> </span><span
                                  style="color:black"><o:p></o:p></span></p>
                              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#44546A">Office:
                                  +972-39266302</span><span
                                  style="color:black"><o:p></o:p></span></p>
                              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#44546A">Cell:     
                                  +972-549266302</span><span
                                  style="color:black"><o:p></o:p></span></p>
                              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#44546A">Email:  
                                  <a moz-do-not-send="true"
                                    href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a></span><span
                                  style="color:black"><o:p></o:p></span></p>
                              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#44546A"> </span><span
                                  style="color:black"><o:p></o:p></span></p>
                              <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">
                                  Greg Mirsky [<a moz-do-not-send="true"
                                    href="mailto:gregimirsky@gmail.com">mailto:gregimirsky@gmail.com</a>]
                                  <br>
                                  <b>Sent:</b> Thursday, January 19,
                                  2017 6:01 PM<br>
                                  <b>To:</b> Les Ginsberg (ginsberg)
                                  &lt;<a moz-do-not-send="true"
                                    href="mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
                                  <b>Cc:</b> Acee Lindem (acee) &lt;<a
                                    moz-do-not-send="true"
                                    href="mailto:acee@cisco.com">acee@cisco.com</a>&gt;;
                                  Robert Sparks &lt;<a
                                    moz-do-not-send="true"
                                    href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;;
                                  <a moz-do-not-send="true"
                                    href="mailto:mpls@ietf.org">mpls@ietf.org</a>;
                                  <a moz-do-not-send="true"
                                    href="mailto:gen-art@ietf.org">
                                    gen-art@ietf.org</a>; <a
                                    moz-do-not-send="true"
                                    href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a
                                    moz-do-not-send="true"
                                    href="mailto:ietf@ietf.org">ietf@ietf.org</a>;
                                  <a moz-do-not-send="true"
                                    href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>;
                                  Abhay Roy (akr) &lt;<a
                                    moz-do-not-send="true"
                                    href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
                                  <b>Subject:</b> Re: [mpls] Review of
                                  draft-ietf-mpls-residence-time-12</span><span
                                  style="color:black"><o:p></o:p></span></p>
                              <p class="MsoNormal"><span
                                  style="color:black"> <o:p></o:p></span></p>
                              <div>
                                <p class="MsoNormal"><span
                                    style="color:black">Hi Les,<o:p></o:p></span></p>
                                <div>
                                  <p class="MsoNormal"><span
                                      style="color:black">I believe that
                                      IGP extensions to advertise RTM
                                      capability are required.<o:p></o:p></span></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"><span
                                      style="color:black"> <o:p></o:p></span></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"><span
                                      style="color:black">Regards,<o:p></o:p></span></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"><span
                                      style="color:black">Greg<o:p></o:p></span></p>
                                </div>
                              </div>
                              <div>
                                <p class="MsoNormal"><span
                                    style="color:black"> <o:p></o:p></span></p>
                                <div>
                                  <p class="MsoNormal"><span
                                      style="color:black">On Thu, Jan
                                      19, 2017 at 7:57 AM, Les Ginsberg
                                      (ginsberg) &lt;<a
                                        moz-do-not-send="true"
                                        href="mailto:ginsberg@cisco.com"
                                        target="_blank">ginsberg@cisco.com</a>&gt;
                                      wrote:<o:p></o:p></span></p>
                                  <blockquote
                                    style="border:none;border-left:solid
                                    #CCCCCC 1.0pt;padding:0in 0in 0in
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
                                    <div>
                                      <div>
                                        <p class="MsoNormal"
                                          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Greg
                                            –</span><span
                                            style="color:black"><o:p></o:p></span></p>
                                        <p class="MsoNormal"
                                          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> </span><span
                                            style="color:black"><o:p></o:p></span></p>
                                        <p class="MsoNormal"
                                          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">I
                                            am having trouble
                                            understanding your response.</span><span
                                            style="color:black"><o:p></o:p></span></p>
                                        <p class="MsoNormal"
                                          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">The
                                            question we are raising is
                                            whether we should extend the
                                            IGPs to support advertising
                                            RTM capability – an
                                            alternative being to
                                            retrieve the capability via
                                            network management.</span><span
                                            style="color:black"><o:p></o:p></span></p>
                                        <p class="MsoNormal"
                                          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> </span><span
                                            style="color:black"><o:p></o:p></span></p>
                                        <p class="MsoNormal"
                                          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Saying
                                            that the IGP functionality
                                            is optional and/or wouldn’t
                                            always be advertised doesn’t
                                            really answer the question
                                            of whether we should or
                                            should not define the IGP
                                            extensions.</span><span
                                            style="color:black"><o:p></o:p></span></p>
                                        <p class="MsoNormal"
                                          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> </span><span
                                            style="color:black"><o:p></o:p></span></p>
                                        <p class="MsoNormal"
                                          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Could
                                            you respond more directly to
                                            this point?</span><span
                                            style="color:black"><o:p></o:p></span></p>
                                        <p class="MsoNormal"
                                          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> </span><span
                                            style="color:black"><o:p></o:p></span></p>
                                        <p class="MsoNormal"
                                          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">  
                                            Les</span><span
                                            style="color:black"><o:p></o:p></span></p>
                                        <p class="MsoNormal"
                                          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> </span><span
                                            style="color:black"><o:p></o:p></span></p>
                                        <p class="MsoNormal"
                                          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> </span><span
                                            style="color:black"><o:p></o:p></span></p>
                                        <div
                                          style="border:none;border-left:solid
                                          blue 1.5pt;padding:0in 0in 0in
                                          4.0pt">
                                          <div>
                                            <div
                                              style="border:none;border-top:solid
                                              #B5C4DF
                                              1.0pt;padding:3.0pt 0in
                                              0in 0in">
                                              <p class="MsoNormal"
                                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;;color:black">From:</span></b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;;color:black">
                                                  Greg Mirsky [mailto:<a
moz-do-not-send="true" href="mailto:gregimirsky@gmail.com"
                                                    target="_blank">gregimirsky@gmail.com</a>]
                                                  <br>
                                                  <b>Sent:</b> Thursday,
                                                  January 19, 2017 7:44
                                                  AM<br>
                                                  <b>To:</b> Acee Lindem
                                                  (acee)<br>
                                                  <b>Cc:</b> Robert
                                                  Sparks; <a
                                                    moz-do-not-send="true"
href="mailto:mpls@ietf.org" target="_blank">mpls@ietf.org</a>;
                                                  <a
                                                    moz-do-not-send="true"
href="mailto:gen-art@ietf.org" target="_blank">gen-art@ietf.org</a>; <a
moz-do-not-send="true"
                                                    href="mailto:draft-ietf-mpls-residence-time.all@ietf.org"
                                                    target="_blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a
                                                    moz-do-not-send="true"
href="mailto:ietf@ietf.org" target="_blank">
                                                    ietf@ietf.org</a>;
                                                  Les Ginsberg
                                                  (ginsberg); <a
                                                    moz-do-not-send="true"
href="mailto:isis-chairs@ietf.org" target="_blank">
                                                    isis-chairs@ietf.org</a>;
                                                  Abhay Roy (akr)</span><span
                                                  style="color:black"><o:p></o:p></span></p>
                                              <div>
                                                <div>
                                                  <p class="MsoNormal"><span
style="color:black"><br>
                                                      <b>Subject:</b>
                                                      Re: [mpls] Review
                                                      of
                                                      draft-ietf-mpls-residence-time-12<o:p></o:p></span></p>
                                                </div>
                                              </div>
                                            </div>
                                          </div>
                                          <div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                  style="color:black"> <o:p></o:p></span></p>
                                              <div>
                                                <p class="MsoNormal"
                                                  style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                    style="color:black">Hi
                                                    Acee,<o:p></o:p></span></p>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="color:black">the draft defines optional functionality. If an
                                                      operator has no
                                                      use neither for
                                                      PTP's Transparent
                                                      Clock, nor RTM
                                                      itself as
                                                      performance
                                                      metric, then RTM
                                                      sub-TLV would not
                                                      be included and
                                                      thus it would not
                                                      be flooded. Of
                                                      course, it be
                                                      right to reflect
                                                      RTM capability
                                                      through YANG data
                                                      model, thus
                                                      allowing SDN
                                                      scenario you've
                                                      described.<o:p></o:p></span></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="color:black"> <o:p></o:p></span></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="color:black">Regards,<o:p></o:p></span></p>
                                                </div>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="color:black">Greg<o:p></o:p></span></p>
                                                </div>
                                              </div>
                                              <div>
                                                <p class="MsoNormal"
                                                  style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                    style="color:black"> <o:p></o:p></span></p>
                                                <div>
                                                  <p class="MsoNormal"
                                                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee)
                                                      &lt;<a
                                                        moz-do-not-send="true"
href="mailto:acee@cisco.com" target="_blank">acee@cisco.com</a>&gt;
                                                      wrote:<o:p></o:p></span></p>
                                                  <div>
                                                    <div>
                                                      <p
                                                        class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Hi
                                                          Greg, </span><span
style="color:black"><o:p></o:p></span></p>
                                                    </div>
                                                    <div>
                                                      <p
                                                        class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                    </div>
                                                    <div>
                                                      <p
                                                        class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Although
                                                          it is a bit
                                                          late, we’ve
                                                          had some
                                                          discussions
                                                          amongst the
                                                          IS-IS and OSPF
                                                          chairs and are
                                                          wondering
                                                          whether the
                                                          interface
                                                          capability
                                                          belongs in the
                                                          IGPs. This
                                                          will be
                                                          flooded
                                                          throughout the
                                                          entire routing
                                                          domain – is it
                                                          really needed
                                                          on every node
                                                          or will it the
                                                          RTM testing be
                                                          initiated from
                                                          an omniscient
                                                          NMS client
                                                          that would
                                                          know the
                                                          capabilities
                                                          of each node
                                                          or easily
                                                          query them
                                                          using YANG? </span><span
style="color:black"><o:p></o:p></span></p>
                                                    </div>
                                                    <div>
                                                      <p
                                                        class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                    </div>
                                                    <div>
                                                      <p
                                                        class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Thanks,</span><span
style="color:black"><o:p></o:p></span></p>
                                                    </div>
                                                    <div>
                                                      <p
                                                        class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Acee
                                                           </span><span
style="color:black"><o:p></o:p></span></p>
                                                    </div>
                                                    <div>
                                                      <p
                                                        class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                    </div>
                                                    <div
                                                      style="border:none;border-top:solid
                                                      #B5C4DF
                                                      1.0pt;padding:3.0pt
                                                      0in 0in 0in">
                                                      <p
                                                        class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
                                                          </span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">mpls
                                                          &lt;<a
                                                          moz-do-not-send="true"
href="mailto:mpls-bounces@ietf.org" target="_blank">mpls-bounces@ietf.org</a>&gt;
                                                          on behalf of
                                                          Greg Mirsky
                                                          &lt;<a
                                                          moz-do-not-send="true"
href="mailto:gregimirsky@gmail.com" target="_blank">gregimirsky@gmail.com</a>&gt;<br>
                                                          <b>Date: </b>Wednesday,
                                                          January 18,
                                                          2017 at 1:25
                                                          PM<br>
                                                          <b>To: </b>Robert
                                                          Sparks &lt;<a
moz-do-not-send="true" href="mailto:rjsparks@nostrum.com"
                                                          target="_blank">rjsparks@nostrum.com</a>&gt;<br>
                                                          <b>Cc: </b>"<a
moz-do-not-send="true" href="mailto:mpls@ietf.org" target="_blank">mpls@ietf.org</a>"
                                                          &lt;<a
                                                          moz-do-not-send="true"
href="mailto:mpls@ietf.org" target="_blank">mpls@ietf.org</a>&gt;, "<a
                                                          moz-do-not-send="true"
href="mailto:gen-art@ietf.org" target="_blank">gen-art@ietf.org</a>"
                                                          &lt;<a
                                                          moz-do-not-send="true"
href="mailto:gen-art@ietf.org" target="_blank">gen-art@ietf.org</a>&gt;,
                                                          "<a
                                                          moz-do-not-send="true"
href="mailto:draft-ietf-mpls-residence-time.all@ietf.org"
                                                          target="_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>"
                                                          &lt;<a
                                                          moz-do-not-send="true"
href="mailto:draft-ietf-mpls-residence-time.all@ietf.org"
                                                          target="_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;,
                                                          "<a
                                                          moz-do-not-send="true"
href="mailto:ietf@ietf.org" target="_blank">ietf@ietf.org</a>" &lt;<a
                                                          moz-do-not-send="true"
href="mailto:ietf@ietf.org" target="_blank">ietf@ietf.org</a>&gt;<br>
                                                          <b>Subject: </b>Re:
                                                          [mpls] Review
                                                          of
                                                          draft-ietf-mpls-residence-time-12</span><span
style="color:black"><o:p></o:p></span></p>
                                                    </div>
                                                    <div>
                                                      <div>
                                                        <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                        </div>
                                                        <blockquote
                                                          style="border:none;border-left:solid
                                                          #B5C4DF
                                                          4.5pt;padding:0in
                                                          0in 0in
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt"
id="m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Hi
                                                          Robert,
                                                          </span><span
                                                          style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">thank
                                                          you for the
                                                          most expedient
                                                          review and
                                                          comments. I'll
                                                          make changes
                                                          in Section 2
                                                          per your
                                                          suggestion.</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Regards,</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Greg</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">On
                                                          Wed, Jan 18,
                                                          2017 at 10:34
                                                          AM, Robert
                                                          Sparks &lt;<a
moz-do-not-send="true" href="mailto:rjsparks@nostrum.com"
                                                          target="_blank">rjsparks@nostrum.com</a>&gt;
                                                          wrote:</span><span
style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">The
                                                          changes all
                                                          look good.</span><span
style="color:black"><o:p></o:p></span></p>
                                                          <p><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">I
                                                          still think
                                                          you should say
                                                          something in
                                                          the document
                                                          about what
                                                          "the time of
                                                          packet
                                                          arrival" and
                                                          "transmission"
                                                          means, and
                                                          call out the
                                                          point you made
                                                          about being
                                                          careful to not
                                                          introduce
                                                          apparent
                                                          jitter by not
                                                          making those
                                                          measurements
                                                          consistently.
                                                          (The
                                                          definitions
                                                          you point to
                                                          in your
                                                          earlier mail
                                                          from G.8013
                                                          don't really
                                                          help - they
                                                          just say "time
                                                          of packet
                                                          arrival".
                                                          Again, the
                                                          first and last
                                                          bit are likely
                                                          to be several
                                                          nanoseconds
                                                          apart so I
                                                          think it
                                                          matters.
                                                          Perhaps you're
                                                          saying it
                                                          doesn't matter
                                                          as long as
                                                          each node is
                                                          consistent
                                                          (there will be
                                                          error in the
                                                          residence time
                                                          measurement,
                                                          but it will be
                                                          constant at
                                                          each node, so
                                                          the sum of
                                                          errors will be
                                                          constant, and
                                                          the clocks
                                                          will be ok?)</span><span
style="color:black"><o:p></o:p></span></p>
                                                          <p><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Please
                                                          look at the
                                                          new first
                                                          paragraph of
                                                          section 2 -
                                                          there's a mix
                                                          of "as case"
                                                          and "in case"
                                                          that should be
                                                          made
                                                          consistent. I
                                                          suspect it
                                                          would be
                                                          easiest to
                                                          simply say
                                                          "referred to
                                                          as using a
                                                          one-step
                                                          clock" and
                                                          "referred to
                                                          as using a
                                                          two-step
                                                          clock" or
                                                          similar.</span><span
style="color:black"><o:p></o:p></span></p>
                                                          <p><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">RjS</span><span
style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">On
                                                          1/18/17 12:03
                                                          PM, Greg
                                                          Mirsky wrote:</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <blockquote
                                                          style="margin-top:5.0pt;margin-bottom:5.0pt">
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Hi
                                                          Robert,
                                                          </span><span
                                                          style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Sasha
                                                          Vainshtein
                                                          came with
                                                          elegant idea
                                                          to address
                                                          disconnection
                                                          between
                                                          discussion of
                                                          one-step and
                                                          two-step modes
                                                          that you've
                                                          pointed out.
                                                          We've moved
                                                          Section 7 as
                                                          sub-section
                                                          into Section 2
                                                          now. Attached
                                                          are updated
                                                          diff and the
                                                          proposed new
                                                          version -13.</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Regards,</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Greg</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">On
                                                          Wed, Jan 18,
                                                          2017 at 8:13
                                                          AM, Greg
                                                          Mirsky &lt;<a
moz-do-not-send="true" href="mailto:gregimirsky@gmail.com"
                                                          target="_blank">gregimirsky@gmail.com</a>&gt;
                                                          wrote:</span><span
style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Hi
                                                          Robert,
                                                          </span><span
                                                          style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">once
                                                          again, thank
                                                          you for your
                                                          thorough
                                                          review and the
                                                          most detailed
                                                          comments. I've
                                                          prepared
                                                          updated
                                                          version and
                                                          would greatly
                                                          appreciate if
                                                          you review the
                                                          changes and
                                                          let us know
                                                          whether your
                                                          comments been
                                                          addressed.
                                                          Attached are
                                                          diff and the
                                                          new version.</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Regards,</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Greg</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">On
                                                          Wed, Jan 11,
                                                          2017 at 7:48
                                                          AM, Robert
                                                          Sparks &lt;<a
moz-do-not-send="true" href="mailto:rjsparks@nostrum.com"
                                                          target="_blank">rjsparks@nostrum.com</a>&gt;
                                                          wrote:</span><span
style="color:black"><o:p></o:p></span></p>
                                                          <div>
                                                          <div>
                                                          <blockquote
                                                          style="border:none;border-left:solid
                                                          #CCCCCC
                                                          1.0pt;padding:0in
                                                          0in 0in
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">Reviewer:
                                                          Robert Sparks<br>
                                                          Review result:
                                                          Ready with
                                                          Nits<br>
                                                          <br>
                                                          I am the
                                                          assigned
                                                          Gen-ART
                                                          reviewer for
                                                          this draft.
                                                          The General
                                                          Area<br>
                                                          Review Team
                                                          (Gen-ART)
                                                          reviews all
                                                          IETF documents
                                                          being
                                                          processed<br>
                                                          by the IESG
                                                          for the IETF
                                                          Chair.  Please
                                                          treat these
                                                          comments just<br>
                                                          like any other
                                                          last call
                                                          comments.<br>
                                                          <br>
                                                          For more
                                                          information,
                                                          please see the
                                                          FAQ at<br>
                                                          &lt;<a
                                                          moz-do-not-send="true"
href="https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target="_blank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
                                                          <br>
                                                          Document:
                                                          draft-ietf-mpls-residence-time-12<br>
                                                          Reviewer:
                                                          Robert Sparks<br>
                                                          Review Date:
                                                          2017-01-10<br>
                                                          IETF LC End
                                                          Date:
                                                          2017-01-17<br>
                                                          IESG Telechat
                                                          date:
                                                          2017-02-02<br>
                                                          <br>
                                                          Summary: Ready
                                                          (with nits)
                                                          for
                                                          publication as
                                                          a Proposed
                                                          Standard<br>
                                                          <br>
                                                          I have two
                                                          primary
                                                          comments. I
                                                          expect both
                                                          are rooted in
                                                          the authors<br>
                                                          and working
                                                          group knowing
                                                          what the
                                                          document means
                                                          instead of
                                                          seeing<br>
                                                          what<br>
                                                          it says or
                                                          doesn't say:<br>
                                                          <br>
                                                          1) The
                                                          document is
                                                          loose with its
                                                          use of
                                                          'packet', and
                                                          where TTLs<br>
                                                          appear when<br>
                                                          they are
                                                          discussed. It
                                                          might be
                                                          helpful to
                                                          rephrase the
                                                          text that<br>
                                                          speaks<br>
                                                          of RTM packets
                                                          in terms of
                                                          RTM messages
                                                          that are
                                                          encoded as
                                                          G-ACh<br>
                                                          messages and<br>
                                                          not refer to
                                                          packets unless
                                                          you mean the
                                                          whole
                                                          encapsulated
                                                          packet<br>
                                                          with MPLS<br>
                                                          header, ACH,
                                                          and G-ACh
                                                          message.<br>
                                                          <br>
                                                          2) Since this
                                                          new mechanic
                                                          speaks in
                                                          terms of
                                                          fractional
                                                          nanoseconds,<br>
                                                          some<br>
                                                          discussion of
                                                          what
                                                          trigger-point
                                                          you intend
                                                          people to use
                                                          for taking<br>
                                                          the<br>
                                                          precise time
                                                          of a packet's
                                                          arrival or
                                                          departure
                                                          seems
                                                          warranted.
                                                          (The<br>
                                                          first and<br>
                                                          last bit of
                                                          the whole
                                                          encapsulated
                                                          packet above
                                                          are going to
                                                          appear at<br>
                                                          the<br>
                                                          physical layer
                                                          many
                                                          nanoseconds
                                                          apart at OC192
                                                          speeds if I've
                                                          done the<br>
                                                          math<br>
                                                          right). It may
                                                          be obvious to
                                                          the folks
                                                          discussing
                                                          this, but it's
                                                          not<br>
                                                          obvious<br>
                                                          from the
                                                          document.  If
                                                          it's _not_
                                                          obvious and
                                                          variation in
                                                          technique<br>
                                                          is<br>
                                                          expected, then
                                                          some
                                                          discussion
                                                          about issues
                                                          that might
                                                          arise from<br>
                                                          different<br>
                                                          implementation
                                                          choices would
                                                          be welcome.<br>
                                                          <br>
                                                          The rest of
                                                          these are
                                                          editorial
                                                          nits:<br>
                                                          <br>
                                                          It would help
                                                          to pull an
                                                          overview
                                                          description of
                                                          the difference<br>
                                                          between<br>
                                                          one-step and
                                                          two-step much
                                                          earlier in the
                                                          document. I
                                                          suggest in the<br>
                                                          overview<br>
                                                          in section 2.
                                                          Otherwise, the
                                                          reader really
                                                          has to jump
                                                          forward and<br>
                                                          read section<br>
                                                          7 before
                                                          section 3's
                                                          5th bullet
                                                          makes any
                                                          sense.<br>
                                                          <br>
                                                          In section 3,
                                                          "IANA will be
                                                          asked" should
                                                          be made
                                                          active. Say
                                                          "This<br>
                                                          document<br>
                                                          asks IANA to"
                                                          and point to
                                                          the IANA
                                                          consideration
                                                          section. Apply<br>
                                                          similar<br>
                                                          treatment to
                                                          the other
                                                          places where
                                                          you talk about
                                                          future IANA<br>
                                                          actions.<br>
                                                          <br>
                                                          There are
                                                          several places
                                                          where there
                                                          are missing
                                                          words
                                                          (typically<br>
                                                          articles or<br>
                                                          prepositions).
                                                          You're less
                                                          likely to end
                                                          up with
                                                          misinterpretations<br>
                                                          during the<br>
                                                          RFC Editor
                                                          phase if you
                                                          provide them
                                                          before the
                                                          document gets
                                                          that far<br>
                                                          in the<br>
                                                          process. The
                                                          spots I found
                                                          most
                                                          disruptive
                                                          were these
                                                          (this is not<br>
                                                          intended to<br>
                                                          be
                                                          exhaustive):<br>
                                                          <br>
                                                            Section 3:
                                                          "set 1
                                                          according"
                                                          -&gt; "set to
                                                          1 according"<br>
                                                            Section 3:
                                                          "the Table 19
                                                          [IEEE..."
                                                          -&gt; "Table
                                                          19 of
                                                          [IEEE..."<br>
                                                            Section 4.2:
                                                          "Detailed
                                                          discussion of
                                                          ... modes in
                                                          Section 7."<br>
                                                                       
                                                                   
                                                          -&gt;
                                                          "Detailed
                                                          discussion of
                                                          ... modes
                                                          appears<br>
                                                          in Section 7."<br>
                                                            Section 10:
                                                          "most of"
                                                          -&gt; "most of
                                                          all"<br>
                                                          <br>
                                                          In Setion 3.1
                                                          at "identity
                                                          of the source
                                                          port", please
                                                          point into the<br>
                                                          document<br>
                                                          that defines
                                                          this identity
                                                          and its
                                                          representation.
                                                          I suspect this
                                                          is a<br>
                                                          pointer<br>
                                                          into a
                                                          specific
                                                          section in
                                                          IEEE.1588.2008].</span><span
style="color:black"><o:p></o:p></span></p>
                                                          </blockquote>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          </blockquote>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"> </span><span
style="color:black"><o:p></o:p></span></p>
                                                          </div>
                                                          </div>
                                                          </div>
                                                        </blockquote>
                                                      </div>
                                                    </div>
                                                  </div>
                                                </div>
                                                <p class="MsoNormal"
                                                  style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                    style="color:black"> <o:p></o:p></span></p>
                                              </div>
                                            </div>
                                          </div>
                                        </div>
                                      </div>
                                    </div>
                                  </blockquote>
                                </div>
                                <p class="MsoNormal"><span
                                    style="color:black"> <o:p></o:p></span></p>
                              </div>
                            </div>
                          </div>
                        </blockquote>
                      </div>
                    </div>
                  </div>
                </blockquote>
              </div>
            </div>
          </div>
        </div>
      </div>
    </blockquote>
    <br>
  </body>
</html>

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To: "Acee Lindem (acee)" <acee@cisco.com>, Hannes Gredler <hannes@gredler.at>, "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, John E Drake <jdrake@juniper.net>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
References: <148414970343.8167.4538946698521330202.idtracker@ietfa.amsl.com> <CA+RyBmVrvyiwDp2kV3VLiQtqOaL=MaVjZugGbvgWnp6y3dwP3Q@mail.gmail.com> <95d41b52-5c85-869f-2139-6713816e9637@nostrum.com> <CA+RyBmWcvU70BZYRj8ZHUZrmkcwq1eHS38jFpyZOq3A_5eXZ9g@mail.gmail.com> <D4A55AE0.9483E%acee@cisco.com> <CA+RyBmWrDhZUmVN0t8aLsL6F3ZfnvBu8FW_2VjDmwj-ercLd5w@mail.gmail.com> <f315026a140148898250f8fa3bdb0123@XCH-ALN-001.cisco.com> <CA+RyBmWMBAXd+zntuAeOU9x7xs9BQSk7J-z9+yyUDvKPd3v2MA@mail.gmail.com> <HE1PR0301MB22660A73C0D5A96BA8F3F0D39D7E0@HE1PR0301MB2266.eurprd03.prod.outlook.com> <D4A65103.94DF0%acee@cisco.com> <DM5PR05MB3001952D0DDD2AA672697094C77E0@DM5PR05MB3001.namprd05.prod.outlook.com> <D4A6573B.94E53%acee@cisco.com> <DM5PR05MB3001ED6AF8296F5DBE5E38EFC77E0@DM5PR05MB3001.namprd05.prod.outlook.com> <3f43cfdfe76e437bb2df6159e5644ae5@XCH-ALN-001.cisco.com> <01e66ab2-aea1-4d60-63c6-9304d644381f@gredler.at> <D4A77012.95F4B%acee@cisco.com>
From: Stewart Bryant <stewart.bryant@gmail.com>
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Date: Mon, 23 Jan 2017 09:37:49 +0000
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Sorry Acee, I accidentally deleted your message about paths that support 
this.

Yes, to get the best quality time transfer you would pick paths such 
that all hops had the property. If you did not do that you can undo all 
the good work you did on the other hops by one that introduces variable 
delay. Indeed if the variability has certain systematic characteristics 
it can be very hard to use other techniques to minimise its impact on 
the quality of the time transfer. An example of a characteristic that is 
very difficult to address by other means is a very slowly increasing delay.

Stewart


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To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Eric Gray <eric.gray@ericsson.com>, "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
References: <148414970343.8167.4538946698521330202.idtracker@ietfa.amsl.com> <D4A55AE0.9483E%acee@cisco.com> <CA+RyBmWrDhZUmVN0t8aLsL6F3ZfnvBu8FW_2VjDmwj-ercLd5w@mail.gmail.com> <f315026a140148898250f8fa3bdb0123@XCH-ALN-001.cisco.com> <CA+RyBmWMBAXd+zntuAeOU9x7xs9BQSk7J-z9+yyUDvKPd3v2MA@mail.gmail.com> <HE1PR0301MB22660A73C0D5A96BA8F3F0D39D7E0@HE1PR0301MB2266.eurprd03.prod.outlook.com> <D4A65103.94DF0%acee@cisco.com> <DM5PR05MB3001952D0DDD2AA672697094C77E0@DM5PR05MB3001.namprd05.prod.outlook.com> <D4A6573B.94E53%acee@cisco.com> <DM5PR05MB3001ED6AF8296F5DBE5E38EFC77E0@DM5PR05MB3001.namprd05.prod.outlook.com> <3f43cfdfe76e437bb2df6159e5644ae5@XCH-ALN-001.cisco.com> <25B4902B1192E84696414485F57268540187782A@dfweml501-mbb> <af41a7a12f104009ac4efff91baefbc3@XCH-ALN-001.cisco.com> <48E1A67CB9CA044EADFEAB87D814BFF64A9AD7A3@eusaamb107.ericsson.se> <HE1PR0301MB22663C3DF269FDBC0F5DA8319D700@HE1PR0301MB2266.eurprd03.prod.outlook.com>
From: Stewart Bryant <stewart.bryant@gmail.com>
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Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Exactly

S


On 21/01/2017 18:42, Alexander Vainshtein wrote:
>
> Eric, Les and all,
>
> I concur with Eric. RTM capability is a kind of TE information that 
> the path computation algorithm must take into account when selecting 
> the suitable path for the LSP that would be used for RTM purposes.
>
> My 2c,
>
> Sasha
>
> Office: +972-39266302
>
> Cell: +972-549266302
>
> Email: Alexander.Vainshtein@ecitele.com
>
> *From:*Eric Gray [mailto:eric.gray@ericsson.com]
> *Sent:* Thursday, January 19, 2017 10:32 PM
> *To:* Les Ginsberg (ginsberg) <ginsberg@cisco.com>; Uma Chunduri 
> <uma.chunduri@huawei.com>; John E Drake <jdrake@juniper.net>; Acee 
> Lindem (acee) <acee@cisco.com>; Alexander Vainshtein 
> <Alexander.Vainshtein@ecitele.com>; Greg Mirsky <gregimirsky@gmail.com>
> *Cc:* mpls@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; 
> gen-art@ietf.org; draft-ietf-mpls-residence-time.all@ietf.org; Abhay 
> Roy (akr) <akr@cisco.com>; Robert Sparks <rjsparks@nostrum.com>
> *Subject:* RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
> Les,
>
> It’s nice to have a good discussion about technical aspects of a 
> proposed standard, even late in the game.
>
> But I have some difficulty is seeing how this usage is “clearly not TE 
> information.”
>
> This information should allow the head-end of an LSP to select a path 
> based on desirable interface capabilities.  For the purposes of 
> accurate time information, the best path may not also be the shortest 
> path.  Is this not exactly what traffic engineering is about?
>
> As far as extending this argument to the ability to advertise 
> additional link capabilities, I can easily imagine scenarios where 
> that would make sense.  But nobody is suggesting that every LSR (or 
> router for that matter) either must have this capability for every 
> scenario, or that – having the capability – it would need to be turned on.
>
> If there is an application or use-case out there that might require 
> advertising every conceivable interface capability, then vendors will 
> want to take a look at the size of the opportunity represented by that 
> and make a decision as to whether or not to support this.
>
> --
>
> Eric
>
> *From:*mpls [mailto:mpls-bounces@ietf.org] *On Behalf Of *Les Ginsberg 
> (ginsberg)
> *Sent:* Thursday, January 19, 2017 3:11 PM
> *To:* Uma Chunduri <uma.chunduri@huawei.com 
> <mailto:uma.chunduri@huawei.com>>; John E Drake <jdrake@juniper.net 
> <mailto:jdrake@juniper.net>>; Acee Lindem (acee) <acee@cisco.com 
> <mailto:acee@cisco.com>>; Alexander Vainshtein 
> <Alexander.Vainshtein@ecitele.com 
> <mailto:Alexander.Vainshtein@ecitele.com>>; Greg Mirsky 
> <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>
> *Cc:* mpls@ietf.org <mailto:mpls@ietf.org>; ietf@ietf.org 
> <mailto:ietf@ietf.org>; isis-chairs@ietf.org 
> <mailto:isis-chairs@ietf.org>; gen-art@ietf.org 
> <mailto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org 
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>; Abhay Roy (akr) 
> <akr@cisco.com <mailto:akr@cisco.com>>; Robert Sparks 
> <rjsparks@nostrum.com <mailto:rjsparks@nostrum.com>>
> *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
> Uma –
>
> I readily admit S-BFD descriptors are – strictly speaking - a 
> violation of the “non-routing info” policy – this was publicly 
> acknowledged at the time the drafts were written. The exception was 
> justified on the basis that:
>
> o IGPs are BFD clients
>
> o The S-BFD discriminator information is unique and extremely modest 
> in size
>
> What we have here is a proposal to start advertising non-routing 
> related interface attribute information. There is nothing special or 
> unique about RTM – it is simply one of many interface attributes which 
> are generic in nature. Having agreed to advertise RTM in the IGPs, how 
> would you then determine what other interface attributes should/should 
> not be advertised by the IGPs? Take a look at your favorite vendors 
> box and see how many interface attributes can be configured.
>
> It is also concerning that – when using the IGPs – we flood 
> information which must be stored on every node even though the use 
> case for it is limited to a much smaller subset.
>
> I think we can and should be smarter in this regard – and given the 
> extensive work being done to enhance manageability I would like to see 
> us benefit from this.
>
> The authors of draft-ietf-mpls-residence-time clearly had some 
> thoughts in this regard – which is why they proposed to use RFC 6823 
> (GENAPP) in IS-IS to advertise the information –but the proposal in 
> the draft is flawed in this regard. If we were to head in the 
> “application” direction I would propose a much more generic 
> “application” which is capable of advertising many interface 
> attributes. However this goes back to my original concern – whether we 
> want to use IGPs to flood interface attribute information unrelated to 
> routing even if it is segregated under an application. Remember that 
> RFC 6823 stipulates that a separate instance of the protocol (a la RFC 
> 6822) be used for such cases.
>
> Les
>
> *From:*Uma Chunduri [mailto:uma.chunduri@huawei.com]
> *Sent:* Thursday, January 19, 2017 11:41 AM
> *To:* Les Ginsberg (ginsberg); John E Drake; Acee Lindem (acee); 
> Alexander Vainshtein; Greg Mirsky
> *Cc:* Abhay Roy (akr); mpls@ietf.org <mailto:mpls@ietf.org>; 
> isis-chairs@ietf.org <mailto:isis-chairs@ietf.org>; gen-art@ietf.org 
> <mailto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org 
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>; Robert Sparks; 
> ietf@ietf.org <mailto:ietf@ietf.org>
> *Subject:* RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
> I support advertising this in IGP.
>
> >This is clearly not TE information –..
>
> >I do not see the IGPs as the appropriate mechanism to flood generic 
> interface capabilities
>
> We have instances where both the above are not met and we flooded 
> information.
>
> https://tools.ietf.org/html/rfc7883(Les, you co-authored the same!!)
>
> https://tools.ietf.org/html/rfc7880
>
> --
>
> Uma C.
>
> *From:*mpls [mailto:mpls-bounces@ietf.org] *On Behalf Of *Les Ginsberg 
> (ginsberg)
> *Sent:* Thursday, January 19, 2017 9:25 AM
> *To:* John E Drake <jdrake@juniper.net <mailto:jdrake@juniper.net>>; 
> Acee Lindem (acee) <acee@cisco.com <mailto:acee@cisco.com>>; Alexander 
> Vainshtein <Alexander.Vainshtein@ecitele.com 
> <mailto:Alexander.Vainshtein@ecitele.com>>; Greg Mirsky 
> <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>
> *Cc:* Abhay Roy (akr) <akr@cisco.com <mailto:akr@cisco.com>>; 
> mpls@ietf.org <mailto:mpls@ietf.org>; isis-chairs@ietf.org 
> <mailto:isis-chairs@ietf.org>; gen-art@ietf.org 
> <mailto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org 
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>; Robert Sparks 
> <rjsparks@nostrum.com <mailto:rjsparks@nostrum.com>>; ietf@ietf.org 
> <mailto:ietf@ietf.org>
> *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
> John –
>
> For me, this raises the age-old question of when it is/is not 
> appropriate to use IGPs for flooding information.
>
> This is clearly not TE information – you just happen to be using this 
> in conjunction with MPLS – but it is a generic capability. I do not 
> see the IGPs as the appropriate mechanism to flood generic interface 
> capabilities. It also, as Acee has pointed out, results in flooding 
> information to all nodes in the domain when only a few care about it.
>
> Les
>
> *From:*John E Drake [mailto:jdrake@juniper.net]
> *Sent:* Thursday, January 19, 2017 8:54 AM
> *To:* Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les 
> Ginsberg (ginsberg)
> *Cc:* Robert Sparks; mpls@ietf.org <mailto:mpls@ietf.org>; 
> gen-art@ietf.org <mailto:gen-art@ietf.org>; 
> draft-ietf-mpls-residence-time.all@ietf.org 
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org 
> <mailto:ietf@ietf.org>; isis-chairs@ietf.org 
> <mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
> *Subject:* RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
> Acee,
>
> Relying on an omniscient controller is a non-starter in general and in 
> particular because the protocol by which it would learn each node’s 
> RTM capabilities and distribute them to the other nodes is undefined.  
> Further, one of the ways by which an omniscient controller learns a 
> node’s capabilities is by snooping the link/state database.
>
> Yours Irrespectively,
>
> John
>
> *From:*Acee Lindem (acee) [mailto:acee@cisco.com]
> *Sent:* Thursday, January 19, 2017 11:47 AM
> *To:* John E Drake <jdrake@juniper.net <mailto:jdrake@juniper.net>>; 
> Alexander Vainshtein <Alexander.Vainshtein@ecitele.com 
> <mailto:Alexander.Vainshtein@ecitele.com>>; Greg Mirsky 
> <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>; Les Ginsberg 
> (ginsberg) <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
> *Cc:* Robert Sparks <rjsparks@nostrum.com 
> <mailto:rjsparks@nostrum.com>>; mpls@ietf.org <mailto:mpls@ietf.org>; 
> gen-art@ietf.org <mailto:gen-art@ietf.org>; 
> draft-ietf-mpls-residence-time.all@ietf.org 
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org 
> <mailto:ietf@ietf.org>; isis-chairs@ietf.org 
> <mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com 
> <mailto:akr@cisco.com>>
> *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
> Hi John,
>
> *From: *John E Drake <jdrake@juniper.net <mailto:jdrake@juniper.net>>
> *Date: *Thursday, January 19, 2017 at 10:43 AM
> *To: *Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>, Alexander 
> Vainshtein <Alexander.Vainshtein@ecitele.com 
> <mailto:Alexander.Vainshtein@ecitele.com>>, Greg Mirsky 
> <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>, "Les Ginsberg 
> (ginsberg)" <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
> *Cc: *Robert Sparks <rjsparks@nostrum.com 
> <mailto:rjsparks@nostrum.com>>, "mpls@ietf.org <mailto:mpls@ietf.org>" 
> <mpls@ietf.org <mailto:mpls@ietf.org>>, "gen-art@ietf.org 
> <mailto:gen-art@ietf.org>" <gen-art@ietf.org 
> <mailto:gen-art@ietf.org>>, 
> "draft-ietf-mpls-residence-time.all@ietf.org 
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>" 
> <draft-ietf-mpls-residence-time.all@ietf.org 
> <mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org 
> <mailto:ietf@ietf.org>" <ietf@ietf.org <mailto:ietf@ietf.org>>, 
> "isis-chairs@ietf.org <mailto:isis-chairs@ietf.org>" 
> <isis-chairs@ietf.org <mailto:isis-chairs@ietf.org>>, "Abhay Roy 
> (akr)" <akr@cisco.com <mailto:akr@cisco.com>>
> *Subject: *RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>     Acee,
>
>     We discussed all of this with you over a year ago and used your
>     guidance in adding the indication of RTM capability to OSPF.
>
> I’m sorry but I focused mainly on the OSPF protocol aspects then and 
> didn’t question the use case. This question came up in the IS-IS WG 
> discussions.
>
> Thanks,
>
> Acee
>
>     Yours Irrespectively,
>
>     John
>
>     *From:*Acee Lindem (acee) [mailto:acee@cisco.com]
>     *Sent:* Thursday, January 19, 2017 11:38 AM
>     *To:* Alexander Vainshtein <Alexander.Vainshtein@ecitele.com
>     <mailto:Alexander.Vainshtein@ecitele.com>>; Greg Mirsky
>     <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>; Les
>     Ginsberg (ginsberg) <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
>     *Cc:* Robert Sparks <rjsparks@nostrum.com
>     <mailto:rjsparks@nostrum.com>>; mpls@ietf.org
>     <mailto:mpls@ietf.org>; gen-art@ietf.org
>     <mailto:gen-art@ietf.org>;
>     draft-ietf-mpls-residence-time.all@ietf.org
>     <mailto:draft-ietf-mpls-residence-time.all@ietf.org>;
>     ietf@ietf.org <mailto:ietf@ietf.org>; isis-chairs@ietf.org
>     <mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com
>     <mailto:akr@cisco.com>>
>     *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>     I guess what we were trying to envision the use case and whether
>     it makes sense for all the nodes in the IGP routing domain to have
>     this information. Would the LSP ingress LSR only need to if the
>     egress LSR supports RTM and it is best effort recording for
>     transit LSRs in the path?
>
>     Additionally, if it is needed in the IGPs, should there also be a
>     BGP-LS Link Attribute TLV proposed?
>
>     Thanks,
>
>     Acee
>
>     *From: *Alexander Vainshtein <Alexander.Vainshtein@ecitele.com
>     <mailto:Alexander.Vainshtein@ecitele.com>>
>     *Date: *Thursday, January 19, 2017 at 10:15 AM
>     *To: *Greg Mirsky <gregimirsky@gmail.com
>     <mailto:gregimirsky@gmail.com>>, "Les Ginsberg (ginsberg)"
>     <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>
>     *Cc: *Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>, Robert
>     Sparks <rjsparks@nostrum.com <mailto:rjsparks@nostrum.com>>,
>     "mpls@ietf.org <mailto:mpls@ietf.org>" <mpls@ietf.org
>     <mailto:mpls@ietf.org>>, "gen-art@ietf.org
>     <mailto:gen-art@ietf.org>" <gen-art@ietf.org
>     <mailto:gen-art@ietf.org>>,
>     "draft-ietf-mpls-residence-time.all@ietf.org
>     <mailto:draft-ietf-mpls-residence-time.all@ietf.org>"
>     <draft-ietf-mpls-residence-time.all@ietf.org
>     <mailto:draft-ietf-mpls-residence-time.all@ietf.org>>,
>     "ietf@ietf.org <mailto:ietf@ietf.org>" <ietf@ietf.org
>     <mailto:ietf@ietf.org>>, "isis-chairs@ietf.org
>     <mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org
>     <mailto:isis-chairs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com
>     <mailto:akr@cisco.com>>
>     *Subject: *RE: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>         Hi all,
>
>         I concur with Greg: from my POV an interoperable solution
>         should not depend on an omniscient NMS client distributing
>         information about capabilities of each node to each other node.
>
>         Regards,
>
>         Sasha
>
>         Office: +972-39266302
>
>         Cell: +972-549266302
>
>         Email: Alexander.Vainshtein@ecitele.com
>         <mailto:Alexander.Vainshtein@ecitele.com>
>
>         *From:*Greg Mirsky [mailto:gregimirsky@gmail.com]
>         *Sent:* Thursday, January 19, 2017 6:01 PM
>         *To:* Les Ginsberg (ginsberg) <ginsberg@cisco.com
>         <mailto:ginsberg@cisco.com>>
>         *Cc:* Acee Lindem (acee) <acee@cisco.com
>         <mailto:acee@cisco.com>>; Robert Sparks <rjsparks@nostrum.com
>         <mailto:rjsparks@nostrum.com>>; mpls@ietf.org
>         <mailto:mpls@ietf.org>; gen-art@ietf.org
>         <mailto:gen-art@ietf.org>;
>         draft-ietf-mpls-residence-time.all@ietf.org
>         <mailto:draft-ietf-mpls-residence-time.all@ietf.org>;
>         ietf@ietf.org <mailto:ietf@ietf.org>; isis-chairs@ietf.org
>         <mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com
>         <mailto:akr@cisco.com>>
>         *Subject:* Re: [mpls] Review of draft-ietf-mpls-residence-time-12
>
>         Hi Les,
>
>         I believe that IGP extensions to advertise RTM capability are
>         required.
>
>         Regards,
>
>         Greg
>
>         On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg)
>         <ginsberg@cisco.com <mailto:ginsberg@cisco.com>> wrote:
>
>             Greg –
>
>             I am having trouble understanding your response.
>
>             The question we are raising is whether we should extend
>             the IGPs to support advertising RTM capability – an
>             alternative being to retrieve the capability via network
>             management.
>
>             Saying that the IGP functionality is optional and/or
>             wouldn’t always be advertised doesn’t really answer the
>             question of whether we should or should not define the IGP
>             extensions.
>
>             Could you respond more directly to this point?
>
>             Les
>
>             *From:*Greg Mirsky [mailto:gregimirsky@gmail.com
>             <mailto:gregimirsky@gmail.com>]
>             *Sent:* Thursday, January 19, 2017 7:44 AM
>             *To:* Acee Lindem (acee)
>             *Cc:* Robert Sparks; mpls@ietf.org <mailto:mpls@ietf.org>;
>             gen-art@ietf.org <mailto:gen-art@ietf.org>;
>             draft-ietf-mpls-residence-time.all@ietf.org
>             <mailto:draft-ietf-mpls-residence-time.all@ietf.org>;
>             ietf@ietf.org <mailto:ietf@ietf.org>; Les Ginsberg
>             (ginsberg); isis-chairs@ietf.org
>             <mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
>
>
>             *Subject:* Re: [mpls] Review of
>             draft-ietf-mpls-residence-time-12
>
>             Hi Acee,
>
>             the draft defines optional functionality. If an operator
>             has no use neither for PTP's Transparent Clock, nor RTM
>             itself as performance metric, then RTM sub-TLV would not
>             be included and thus it would not be flooded. Of course,
>             it be right to reflect RTM capability through YANG data
>             model, thus allowing SDN scenario you've described.
>
>             Regards,
>
>             Greg
>
>             On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee)
>             <acee@cisco.com <mailto:acee@cisco.com>> wrote:
>
>             Hi Greg,
>
>             Although it is a bit late, we’ve had some discussions
>             amongst the IS-IS and OSPF chairs and are wondering
>             whether the interface capability belongs in the IGPs. This
>             will be flooded throughout the entire routing domain – is
>             it really needed on every node or will it the RTM testing
>             be initiated from an omniscient NMS client that would know
>             the capabilities of each node or easily query them using
>             YANG?
>
>             Thanks,
>
>             Acee
>
>             *From: *mpls <mpls-bounces@ietf.org
>             <mailto:mpls-bounces@ietf.org>> on behalf of Greg Mirsky
>             <gregimirsky@gmail.com <mailto:gregimirsky@gmail.com>>
>             *Date: *Wednesday, January 18, 2017 at 1:25 PM
>             *To: *Robert Sparks <rjsparks@nostrum.com
>             <mailto:rjsparks@nostrum.com>>
>             *Cc: *"mpls@ietf.org <mailto:mpls@ietf.org>"
>             <mpls@ietf.org <mailto:mpls@ietf.org>>, "gen-art@ietf.org
>             <mailto:gen-art@ietf.org>" <gen-art@ietf.org
>             <mailto:gen-art@ietf.org>>,
>             "draft-ietf-mpls-residence-time.all@ietf.org
>             <mailto:draft-ietf-mpls-residence-time.all@ietf.org>"
>             <draft-ietf-mpls-residence-time.all@ietf.org
>             <mailto:draft-ietf-mpls-residence-time.all@ietf.org>>,
>             "ietf@ietf.org <mailto:ietf@ietf.org>" <ietf@ietf.org
>             <mailto:ietf@ietf.org>>
>             *Subject: *Re: [mpls] Review of
>             draft-ietf-mpls-residence-time-12
>
>                 Hi Robert,
>
>                 thank you for the most expedient review and comments.
>                 I'll make changes in Section 2 per your suggestion.
>
>                 Regards,
>
>                 Greg
>
>                 On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks
>                 <rjsparks@nostrum.com <mailto:rjsparks@nostrum.com>>
>                 wrote:
>
>                 The changes all look good.
>
>                 I still think you should say something in the document
>                 about what "the time of packet arrival" and
>                 "transmission" means, and call out the point you made
>                 about being careful to not introduce apparent jitter
>                 by not making those measurements consistently. (The
>                 definitions you point to in your earlier mail from
>                 G.8013 don't really help - they just say "time of
>                 packet arrival". Again, the first and last bit are
>                 likely to be several nanoseconds apart so I think it
>                 matters. Perhaps you're saying it doesn't matter as
>                 long as each node is consistent (there will be error
>                 in the residence time measurement, but it will be
>                 constant at each node, so the sum of errors will be
>                 constant, and the clocks will be ok?)
>
>                 Please look at the new first paragraph of section 2 -
>                 there's a mix of "as case" and "in case" that should
>                 be made consistent. I suspect it would be easiest to
>                 simply say "referred to as using a one-step clock" and
>                 "referred to as using a two-step clock" or similar.
>
>                 RjS
>
>                 On 1/18/17 12:03 PM, Greg Mirsky wrote:
>
>                     Hi Robert,
>
>                     Sasha Vainshtein came with elegant idea to address
>                     disconnection between discussion of one-step and
>                     two-step modes that you've pointed out. We've
>                     moved Section 7 as sub-section into Section 2 now.
>                     Attached are updated diff and the proposed new
>                     version -13.
>
>                     Regards,
>
>                     Greg
>
>                     On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky
>                     <gregimirsky@gmail.com
>                     <mailto:gregimirsky@gmail.com>> wrote:
>
>                     Hi Robert,
>
>                     once again, thank you for your thorough review and
>                     the most detailed comments. I've prepared updated
>                     version and would greatly appreciate if you review
>                     the changes and let us know whether your comments
>                     been addressed. Attached are diff and the new version.
>
>                     Regards,
>
>                     Greg
>
>                     On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks
>                     <rjsparks@nostrum.com
>                     <mailto:rjsparks@nostrum.com>> wrote:
>
>                         Reviewer: Robert Sparks
>                         Review result: Ready with Nits
>
>                         I am the assigned Gen-ART reviewer for this
>                         draft. The General Area
>                         Review Team (Gen-ART) reviews all IETF
>                         documents being processed
>                         by the IESG for the IETF Chair.  Please treat
>                         these comments just
>                         like any other last call comments.
>
>                         For more information, please see the FAQ at
>                         <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
>
>                         Document: draft-ietf-mpls-residence-time-12
>                         Reviewer: Robert Sparks
>                         Review Date: 2017-01-10
>                         IETF LC End Date: 2017-01-17
>                         IESG Telechat date: 2017-02-02
>
>                         Summary: Ready (with nits) for publication as
>                         a Proposed Standard
>
>                         I have two primary comments. I expect both are
>                         rooted in the authors
>                         and working group knowing what the document
>                         means instead of seeing
>                         what
>                         it says or doesn't say:
>
>                         1) The document is loose with its use of
>                         'packet', and where TTLs
>                         appear when
>                         they are discussed. It might be helpful to
>                         rephrase the text that
>                         speaks
>                         of RTM packets in terms of RTM messages that
>                         are encoded as G-ACh
>                         messages and
>                         not refer to packets unless you mean the whole
>                         encapsulated packet
>                         with MPLS
>                         header, ACH, and G-ACh message.
>
>                         2) Since this new mechanic speaks in terms of
>                         fractional nanoseconds,
>                         some
>                         discussion of what trigger-point you intend
>                         people to use for taking
>                         the
>                         precise time of a packet's arrival or
>                         departure seems warranted. (The
>                         first and
>                         last bit of the whole encapsulated packet
>                         above are going to appear at
>                         the
>                         physical layer many nanoseconds apart at OC192
>                         speeds if I've done the
>                         math
>                         right). It may be obvious to the folks
>                         discussing this, but it's not
>                         obvious
>                         from the document.  If it's _not_ obvious and
>                         variation in technique
>                         is
>                         expected, then some discussion about issues
>                         that might arise from
>                         different
>                         implementation choices would be welcome.
>
>                         The rest of these are editorial nits:
>
>                         It would help to pull an overview description
>                         of the difference
>                         between
>                         one-step and two-step much earlier in the
>                         document. I suggest in the
>                         overview
>                         in section 2. Otherwise, the reader really has
>                         to jump forward and
>                         read section
>                         7 before section 3's 5th bullet makes any sense.
>
>                         In section 3, "IANA will be asked" should be
>                         made active. Say "This
>                         document
>                         asks IANA to" and point to the IANA
>                         consideration section. Apply
>                         similar
>                         treatment to the other places where you talk
>                         about future IANA
>                         actions.
>
>                         There are several places where there are
>                         missing words (typically
>                         articles or
>                         prepositions). You're less likely to end up
>                         with misinterpretations
>                         during the
>                         RFC Editor phase if you provide them before
>                         the document gets that far
>                         in the
>                         process. The spots I found most disruptive
>                         were these (this is not
>                         intended to
>                         be exhaustive):
>
>                           Section 3: "set 1 according" -> "set to 1
>                         according"
>                           Section 3: "the Table 19 [IEEE..." -> "Table
>                         19 of [IEEE..."
>                           Section 4.2: "Detailed discussion of ...
>                         modes in Section 7."
>                         -> "Detailed discussion of ... modes appears
>                         in Section 7."
>                           Section 10: "most of" -> "most of all"
>
>                         In Setion 3.1 at "identity of the source
>                         port", please point into the
>                         document
>                         that defines this identity and its
>                         representation. I suspect this is a
>                         pointer
>                         into a specific section in IEEE.1588.2008].
>


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    <p>Exactly</p>
    <p>S<br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 21/01/2017 18:42, Alexander
      Vainshtein wrote:<br>
    </div>
    <blockquote
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        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">Eric,
            Les and all,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">I
            concur with Eric. RTM capability is a kind of TE information
            that the path computation algorithm must take into account
            when selecting the suitable path for the LSP that would be
            used for RTM purposes. <o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A"><o:p> </o:p></span></p>
        <div>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">My
              2c,</span><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A"><o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">Sasha<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">Office:
              +972-39266302<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">Cell:     
              +972-549266302<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">Email:  
              <a class="moz-txt-link-abbreviated" href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a><o:p></o:p></span></p>
        </div>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A"><o:p> </o:p></span></p>
        <div>
          <div style="border:none;border-top:solid #E1E1E1
            1.0pt;padding:3.0pt 0cm 0cm 0cm">
            <p class="MsoNormal"><b><span
                  style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">
                Eric Gray [<a class="moz-txt-link-freetext" href="mailto:eric.gray@ericsson.com">mailto:eric.gray@ericsson.com</a>]
                <br>
                <b>Sent:</b> Thursday, January 19, 2017 10:32 PM<br>
                <b>To:</b> Les Ginsberg (ginsberg)
                <a class="moz-txt-link-rfc2396E" href="mailto:ginsberg@cisco.com">&lt;ginsberg@cisco.com&gt;</a>; Uma Chunduri
                <a class="moz-txt-link-rfc2396E" href="mailto:uma.chunduri@huawei.com">&lt;uma.chunduri@huawei.com&gt;</a>; John E Drake
                <a class="moz-txt-link-rfc2396E" href="mailto:jdrake@juniper.net">&lt;jdrake@juniper.net&gt;</a>; Acee Lindem (acee)
                <a class="moz-txt-link-rfc2396E" href="mailto:acee@cisco.com">&lt;acee@cisco.com&gt;</a>; Alexander Vainshtein
                <a class="moz-txt-link-rfc2396E" href="mailto:Alexander.Vainshtein@ecitele.com">&lt;Alexander.Vainshtein@ecitele.com&gt;</a>; Greg Mirsky
                <a class="moz-txt-link-rfc2396E" href="mailto:gregimirsky@gmail.com">&lt;gregimirsky@gmail.com&gt;</a><br>
                <b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:mpls@ietf.org">mpls@ietf.org</a>; <a class="moz-txt-link-abbreviated" href="mailto:ietf@ietf.org">ietf@ietf.org</a>;
                <a class="moz-txt-link-abbreviated" href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; <a class="moz-txt-link-abbreviated" href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>;
                <a class="moz-txt-link-abbreviated" href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>; Abhay Roy
                (akr) <a class="moz-txt-link-rfc2396E" href="mailto:akr@cisco.com">&lt;akr@cisco.com&gt;</a>; Robert Sparks
                <a class="moz-txt-link-rfc2396E" href="mailto:rjsparks@nostrum.com">&lt;rjsparks@nostrum.com&gt;</a><br>
                <b>Subject:</b> RE: [mpls] Review of
                draft-ietf-mpls-residence-time-12<o:p></o:p></span></p>
          </div>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">Les,</span><o:p></o:p></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">               
            It’s nice to have a good discussion about technical aspects
            of a proposed standard, even late in the game.</span><o:p></o:p></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">               
            But I have some difficulty is seeing how this usage is
            “clearly not TE information.” 
          </span><o:p></o:p></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
        <p class="MsoNormal" style="text-indent:36.0pt"><span
            style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">This
            information should allow the head-end of an LSP to select a
            path based on desirable interface capabilities.  For the
            purposes of accurate time information, the best path may not
            also be the shortest path.  Is this not exactly what traffic
            engineering is about?</span><o:p></o:p></p>
        <p class="MsoNormal" style="text-indent:36.0pt"><span
            style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
        <p class="MsoNormal" style="text-indent:36.0pt"><span
            style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">As
            far as extending this argument to the ability to advertise
            additional link capabilities, I can easily imagine scenarios
            where that would make sense.  But nobody is suggesting that
            every LSR (or router for that matter) either must have this
            capability for every scenario, or that – having the
            capability – it would need to be turned on.</span><o:p></o:p></p>
        <p class="MsoNormal" style="text-indent:36.0pt"><span
            style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
        <p class="MsoNormal" style="text-indent:36.0pt"><span
            style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">If
            there is an application or use-case out there that might
            require advertising every conceivable interface capability,
            then vendors will want to take a look at the size of the
            opportunity represented by that and make a decision as to
            whether or not to support this.</span><o:p></o:p></p>
        <p class="MsoNormal" style="text-indent:36.0pt"><span
            style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">--</span><o:p></o:p></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">Eric</span><o:p></o:p></p>
        <p class="MsoNormal"><span
            style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> </span><o:p></o:p></p>
        <div>
          <div style="border:none;border-top:solid #E1E1E1
            1.0pt;padding:3.0pt 0cm 0cm 0cm">
            <p class="MsoNormal"><b><span
                  style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">
                mpls [<a moz-do-not-send="true"
                  href="mailto:mpls-bounces@ietf.org">mailto:mpls-bounces@ietf.org</a>]
                <b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
                <b>Sent:</b> Thursday, January 19, 2017 3:11 PM<br>
                <b>To:</b> Uma Chunduri &lt;<a moz-do-not-send="true"
                  href="mailto:uma.chunduri@huawei.com">uma.chunduri@huawei.com</a>&gt;;
                John E Drake &lt;<a moz-do-not-send="true"
                  href="mailto:jdrake@juniper.net">jdrake@juniper.net</a>&gt;;
                Acee Lindem (acee) &lt;<a moz-do-not-send="true"
                  href="mailto:acee@cisco.com">acee@cisco.com</a>&gt;;
                Alexander Vainshtein &lt;<a moz-do-not-send="true"
                  href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
                Greg Mirsky &lt;<a moz-do-not-send="true"
                  href="mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;<br>
                <b>Cc:</b> <a moz-do-not-send="true"
                  href="mailto:mpls@ietf.org">mpls@ietf.org</a>; <a
                  moz-do-not-send="true" href="mailto:ietf@ietf.org">
                  ietf@ietf.org</a>; <a moz-do-not-send="true"
                  href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>;
                <a moz-do-not-send="true" href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>;
                <a moz-do-not-send="true"
                  href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">
                  draft-ietf-mpls-residence-time.all@ietf.org</a>; Abhay
                Roy (akr) &lt;<a moz-do-not-send="true"
                  href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;;
                Robert Sparks &lt;<a moz-do-not-send="true"
                  href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;<br>
                <b>Subject:</b> Re: [mpls] Review of
                draft-ietf-mpls-residence-time-12</span><o:p></o:p></p>
          </div>
        </div>
        <p class="MsoNormal"> <o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Uma
            –</span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">I
            readily admit S-BFD descriptors are – strictly speaking - a
            violation of the “non-routing info” policy – this was
            publicly acknowledged at the time the drafts were written.
            The exception was justified on the basis that:</span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> 
            o IGPs are BFD clients</span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> 
            o The S-BFD discriminator information is unique and
            extremely modest in size</span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
        <p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">What
            we have here is a proposal to start advertising non-routing
            related interface attribute information. There is nothing
            special or unique about RTM – it is simply one of many
            interface attributes which are generic in nature. Having
            agreed to advertise RTM in the IGPs, how would you then
            determine what other interface attributes should/should not
            be advertised by the IGPs? Take a look at your favorite
            vendors box and see how many interface attributes can be
            configured.</span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">It
            is also concerning that – when using the IGPs – we flood
            information which must be stored on every node even though
            the use case for it is limited to a much smaller subset.</span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">I
            think we can and should be smarter in this regard – and
            given the extensive work being done to enhance manageability
            I would like to see us benefit from this.</span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">The
            authors of draft-ietf-mpls-residence-time clearly had some
            thoughts in this regard – which is why they proposed to use
            RFC 6823 (GENAPP) in IS-IS to advertise the information –but
            the proposal in the draft is flawed in this regard. If we
            were to head in the “application” direction I would propose
            a much more generic “application” which is capable of
            advertising many interface attributes. However this goes
            back to my original concern – whether we want to use IGPs to
            flood interface attribute information unrelated to routing
            even if it is segregated under an application. Remember that
            RFC 6823 stipulates that a separate instance of the protocol
            (a la RFC 6822) be used for such cases.</span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">  
            Les</span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
        <div style="border:none;border-left:solid blue 1.5pt;padding:0cm
          0cm 0cm 4.0pt">
          <div>
            <div style="border:none;border-top:solid #B5C4DF
              1.0pt;padding:3.0pt 0cm 0cm 0cm">
              <p class="MsoNormal"><b><span
                    style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">From:</span></b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif"> Uma
                  Chunduri [<a moz-do-not-send="true"
                    href="mailto:uma.chunduri@huawei.com">mailto:uma.chunduri@huawei.com</a>]
                  <br>
                  <b>Sent:</b> Thursday, January 19, 2017 11:41 AM<br>
                  <b>To:</b> Les Ginsberg (ginsberg); John E Drake; Acee
                  Lindem (acee); Alexander Vainshtein; Greg Mirsky<br>
                  <b>Cc:</b> Abhay Roy (akr); <a moz-do-not-send="true"
                    href="mailto:mpls@ietf.org">mpls@ietf.org</a>; <a
                    moz-do-not-send="true"
                    href="mailto:isis-chairs@ietf.org">
                    isis-chairs@ietf.org</a>; <a moz-do-not-send="true"
                    href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>;
                  <a moz-do-not-send="true"
                    href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>;
                  Robert Sparks;
                  <a moz-do-not-send="true" href="mailto:ietf@ietf.org">ietf@ietf.org</a><br>
                  <b>Subject:</b> RE: [mpls] Review of
                  draft-ietf-mpls-residence-time-12</span><o:p></o:p></p>
            </div>
          </div>
          <p class="MsoNormal"> <o:p></o:p></p>
          <p class="MsoNormal"><a moz-do-not-send="true"
              name="_MailEndCompose"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">I
                support advertising this in IGP.</span></a><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
          <div>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">&gt;This
                is clearly not TE information –..</span><o:p></o:p></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">&gt;I
                do not see the IGPs as the appropriate mechanism to
                flood generic interface capabilities</span><o:p></o:p></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">We
                have instances where both the above are not met and we
                flooded information.</span><o:p></o:p></p>
            <p class="MsoNormal"><a moz-do-not-send="true"
                href="https://tools.ietf.org/html/rfc7883"><span
                  style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">https://tools.ietf.org/html/rfc7883</span></a><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">
                (Les, you co-authored the same!!)</span><o:p></o:p></p>
            <p class="MsoNormal"><a moz-do-not-send="true"
                href="https://tools.ietf.org/html/rfc7880"><span
                  style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">https://tools.ietf.org/html/rfc7880</span></a><o:p></o:p></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">--</span><o:p></o:p></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Uma
                C.</span><o:p></o:p></p>
          </div>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
          <div>
            <div style="border:none;border-top:solid #E1E1E1
              1.0pt;padding:3.0pt 0cm 0cm 0cm">
              <p class="MsoNormal"><b><span
                    style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">
                  mpls [<a moz-do-not-send="true"
                    href="mailto:mpls-bounces@ietf.org">mailto:mpls-bounces@ietf.org</a>]
                  <b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
                  <b>Sent:</b> Thursday, January 19, 2017 9:25 AM<br>
                  <b>To:</b> John E Drake &lt;<a moz-do-not-send="true"
                    href="mailto:jdrake@juniper.net">jdrake@juniper.net</a>&gt;;
                  Acee Lindem (acee) &lt;<a moz-do-not-send="true"
                    href="mailto:acee@cisco.com">acee@cisco.com</a>&gt;;
                  Alexander Vainshtein &lt;<a moz-do-not-send="true"
                    href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
                  Greg Mirsky &lt;<a moz-do-not-send="true"
                    href="mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;<br>
                  <b>Cc:</b> Abhay Roy (akr) &lt;<a
                    moz-do-not-send="true" href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;;
                  <a moz-do-not-send="true" href="mailto:mpls@ietf.org">
                    mpls@ietf.org</a>; <a moz-do-not-send="true"
                    href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>;
                  <a moz-do-not-send="true"
                    href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>;
                  <a moz-do-not-send="true"
                    href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">
                    draft-ietf-mpls-residence-time.all@ietf.org</a>;
                  Robert Sparks &lt;<a moz-do-not-send="true"
                    href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;;
                  <a moz-do-not-send="true" href="mailto:ietf@ietf.org">ietf@ietf.org</a><br>
                  <b>Subject:</b> Re: [mpls] Review of
                  draft-ietf-mpls-residence-time-12</span><o:p></o:p></p>
            </div>
          </div>
          <p class="MsoNormal"> <o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">John
              –</span><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">For
              me, this raises the age-old question of when it is/is not
              appropriate to use IGPs for flooding information.</span><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">This
              is clearly not TE information – you just happen to be
              using this in conjunction with MPLS – but it is a generic
              capability. I do not see the IGPs as the appropriate
              mechanism to flood generic interface capabilities. It
              also, as Acee has pointed out, results in flooding
              information to all nodes in the domain when only a few
              care about it.</span><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">  
              Les</span><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
          <div style="border:none;border-left:solid blue
            1.5pt;padding:0cm 0cm 0cm 4.0pt">
            <div>
              <div style="border:none;border-top:solid #B5C4DF
                1.0pt;padding:3.0pt 0cm 0cm 0cm">
                <p class="MsoNormal"><b><span
                      style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">From:</span></b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif"> John
                    E Drake [<a moz-do-not-send="true"
                      href="mailto:jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
                    <br>
                    <b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
                    <b>To:</b> Acee Lindem (acee); Alexander Vainshtein;
                    Greg Mirsky; Les Ginsberg (ginsberg)<br>
                    <b>Cc:</b> Robert Sparks; <a moz-do-not-send="true"
                      href="mailto:mpls@ietf.org">mpls@ietf.org</a>; <a
                      moz-do-not-send="true"
                      href="mailto:gen-art@ietf.org">
                      gen-art@ietf.org</a>; <a moz-do-not-send="true"
                      href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">
                      draft-ietf-mpls-residence-time.all@ietf.org</a>; <a
                      moz-do-not-send="true" href="mailto:ietf@ietf.org">ietf@ietf.org</a>;
                    <a moz-do-not-send="true"
                      href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>;
                    Abhay Roy (akr)<br>
                    <b>Subject:</b> RE: [mpls] Review of
                    draft-ietf-mpls-residence-time-12</span><o:p></o:p></p>
              </div>
            </div>
            <p class="MsoNormal"> <o:p></o:p></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Acee,</span><o:p></o:p></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Relying
                on an omniscient controller is a non-starter in general
                and in particular because the protocol by which it would
                learn each node’s RTM capabilities and distribute them
                to the other nodes is undefined.  Further, one of the
                ways by which an omniscient controller learns a node’s
                capabilities is by snooping the link/state database.</span><o:p></o:p></p>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
            <div>
              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Yours
                  Irrespectively,</span><o:p></o:p></p>
              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
              <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">John</span><o:p></o:p></p>
            </div>
            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
            <div style="border:none;border-left:solid blue
              1.5pt;padding:0cm 0cm 0cm 4.0pt">
              <div>
                <div style="border:none;border-top:solid #E1E1E1
                  1.0pt;padding:3.0pt 0cm 0cm 0cm">
                  <p class="MsoNormal"><b><span
                        style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">
                      Acee Lindem (acee) [<a moz-do-not-send="true"
                        href="mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
                      <br>
                      <b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
                      <b>To:</b> John E Drake &lt;<a
                        moz-do-not-send="true"
                        href="mailto:jdrake@juniper.net">jdrake@juniper.net</a>&gt;;
                      Alexander Vainshtein &lt;<a moz-do-not-send="true"
                        href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
                      Greg Mirsky &lt;<a moz-do-not-send="true"
                        href="mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
                      Les Ginsberg (ginsberg) &lt;<a
                        moz-do-not-send="true"
                        href="mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
                      <b>Cc:</b> Robert Sparks &lt;<a
                        moz-do-not-send="true"
                        href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;;
                      <a moz-do-not-send="true"
                        href="mailto:mpls@ietf.org">mpls@ietf.org</a>; <a
                        moz-do-not-send="true"
                        href="mailto:gen-art@ietf.org">
                        gen-art@ietf.org</a>; <a moz-do-not-send="true"
href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">
                        draft-ietf-mpls-residence-time.all@ietf.org</a>;
                      <a moz-do-not-send="true"
                        href="mailto:ietf@ietf.org">ietf@ietf.org</a>;
                      <a moz-do-not-send="true"
                        href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>;
                      Abhay Roy (akr) &lt;<a moz-do-not-send="true"
                        href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
                      <b>Subject:</b> Re: [mpls] Review of
                      draft-ietf-mpls-residence-time-12</span><o:p></o:p></p>
                </div>
              </div>
              <p class="MsoNormal"> <o:p></o:p></p>
              <div>
                <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Hi
                    John, </span><o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
              </div>
              <div style="border:none;border-top:solid #B5C4DF
                1.0pt;padding:3.0pt 0cm 0cm 0cm">
                <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">From:
                    </span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">John
                    E Drake &lt;<a moz-do-not-send="true"
                      href="mailto:jdrake@juniper.net">jdrake@juniper.net</a>&gt;<br>
                    <b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
                    <b>To: </b>Acee Lindem &lt;<a
                      moz-do-not-send="true"
                      href="mailto:acee@cisco.com">acee@cisco.com</a>&gt;,
                    Alexander Vainshtein &lt;<a moz-do-not-send="true"
                      href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;,
                    Greg Mirsky &lt;<a moz-do-not-send="true"
                      href="mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
                    "Les Ginsberg (ginsberg)" &lt;<a
                      moz-do-not-send="true"
                      href="mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
                    <b>Cc: </b>Robert Sparks &lt;<a
                      moz-do-not-send="true"
                      href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;,
                    "<a moz-do-not-send="true"
                      href="mailto:mpls@ietf.org">mpls@ietf.org</a>"
                    &lt;<a moz-do-not-send="true"
                      href="mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
                    "<a moz-do-not-send="true"
                      href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>"
                    &lt;<a moz-do-not-send="true"
                      href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
                    "<a moz-do-not-send="true"
                      href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>"
                    &lt;<a moz-do-not-send="true"
                      href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;,
                    "<a moz-do-not-send="true"
                      href="mailto:ietf@ietf.org">ietf@ietf.org</a>"
                    &lt;<a moz-do-not-send="true"
                      href="mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;,
                    "<a moz-do-not-send="true"
                      href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>"
                    &lt;<a moz-do-not-send="true"
                      href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;,
                    "Abhay Roy (akr)" &lt;<a moz-do-not-send="true"
                      href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
                    <b>Subject: </b>RE: [mpls] Review of
                    draft-ietf-mpls-residence-time-12</span><o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
              </div>
              <blockquote style="border:none;border-left:solid #B5C4DF
                4.5pt;padding:0cm 0cm 0cm
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt"
                id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
                <div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Acee,</span><o:p></o:p></p>
                    <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                    <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">We
                        discussed all of this with you over a year ago
                        and used your guidance in adding the indication
                        of RTM capability to OSPF.</span><o:p></o:p></p>
                  </div>
                </div>
              </blockquote>
              <div>
                <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">I’m
                    sorry but I focused mainly on the OSPF protocol
                    aspects then and didn’t question the use case. This
                    question came up in the IS-IS WG discussions. </span><o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Thanks,</span><o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Acee</span><o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
              </div>
              <blockquote style="border:none;border-left:solid #B5C4DF
                4.5pt;padding:0cm 0cm 0cm
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt"
                id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
                <div>
                  <div>
                    <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                    <div>
                      <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Yours
                          Irrespectively,</span><o:p></o:p></p>
                      <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                      <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">John</span><o:p></o:p></p>
                    </div>
                    <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                    <div style="border:none;border-left:solid blue
                      1.5pt;padding:0cm 0cm 0cm 4.0pt">
                      <div>
                        <div style="border:none;border-top:solid #E1E1E1
                          1.0pt;padding:3.0pt 0cm 0cm 0cm">
                          <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">
                              Acee Lindem (acee) [<a
                                moz-do-not-send="true"
                                href="mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
                              <br>
                              <b>Sent:</b> Thursday, January 19, 2017
                              11:38 AM<br>
                              <b>To:</b> Alexander Vainshtein &lt;<a
                                moz-do-not-send="true"
                                href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
                              Greg Mirsky &lt;<a moz-do-not-send="true"
                                href="mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
                              Les Ginsberg (ginsberg) &lt;<a
                                moz-do-not-send="true"
                                href="mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
                              <b>Cc:</b> Robert Sparks &lt;<a
                                moz-do-not-send="true"
                                href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;;
                              <a moz-do-not-send="true"
                                href="mailto:mpls@ietf.org">mpls@ietf.org</a>;
                              <a moz-do-not-send="true"
                                href="mailto:gen-art@ietf.org">
                                gen-art@ietf.org</a>; <a
                                moz-do-not-send="true"
                                href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a
                                moz-do-not-send="true"
                                href="mailto:ietf@ietf.org">ietf@ietf.org</a>;
                              <a moz-do-not-send="true"
                                href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>;
                              Abhay Roy (akr) &lt;<a
                                moz-do-not-send="true"
                                href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
                              <b>Subject:</b> Re: [mpls] Review of
                              draft-ietf-mpls-residence-time-12</span><o:p></o:p></p>
                        </div>
                      </div>
                      <p class="MsoNormal"><span style="color:black"> </span><o:p></o:p></p>
                      <div>
                        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">I
                            guess what we were trying to envision the
                            use case and whether it makes sense for all
                            the nodes in the IGP routing domain to have
                            this information. Would the LSP ingress LSR
                            only need to if the egress LSR supports RTM
                            and it is best effort recording for transit
                            LSRs in the path?  </span><o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Additionally,
                            if it is needed in the IGPs, should there
                            also be a BGP-LS Link Attribute TLV
                            proposed? </span><o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Thanks,</span><o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Acee </span><o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                      </div>
                      <div style="border:none;border-top:solid #B5C4DF
                        1.0pt;padding:3.0pt 0cm 0cm 0cm">
                        <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">From:
                            </span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Alexander
                            Vainshtein &lt;<a moz-do-not-send="true"
                              href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;<br>
                            <b>Date: </b>Thursday, January 19, 2017 at
                            10:15 AM<br>
                            <b>To: </b>Greg Mirsky &lt;<a
                              moz-do-not-send="true"
                              href="mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
                            "Les Ginsberg (ginsberg)" &lt;<a
                              moz-do-not-send="true"
                              href="mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
                            <b>Cc: </b>Acee Lindem &lt;<a
                              moz-do-not-send="true"
                              href="mailto:acee@cisco.com">acee@cisco.com</a>&gt;,
                            Robert Sparks &lt;<a moz-do-not-send="true"
                              href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;,
                            "<a moz-do-not-send="true"
                              href="mailto:mpls@ietf.org">mpls@ietf.org</a>"
                            &lt;<a moz-do-not-send="true"
                              href="mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
                            "<a moz-do-not-send="true"
                              href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>"
                            &lt;<a moz-do-not-send="true"
                              href="mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
                            "<a moz-do-not-send="true"
                              href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>"
                            &lt;<a moz-do-not-send="true"
                              href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;,
                            "<a moz-do-not-send="true"
                              href="mailto:ietf@ietf.org">ietf@ietf.org</a>"
                            &lt;<a moz-do-not-send="true"
                              href="mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;,
                            "<a moz-do-not-send="true"
                              href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>"
                            &lt;<a moz-do-not-send="true"
                              href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;,
                            "Abhay Roy (akr)" &lt;<a
                              moz-do-not-send="true"
                              href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
                            <b>Subject: </b>RE: [mpls] Review of
                            draft-ietf-mpls-residence-time-12</span><o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                      </div>
                      <blockquote style="border:none;border-left:solid
                        #B5C4DF 4.5pt;padding:0cm 0cm 0cm
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt"
                        id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
                        <div>
                          <div>
                            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">Hi
                                all,</span><o:p></o:p></p>
                            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">I
                                concur with Greg: from my POV an
                                interoperable solution should not depend
                                on an omniscient NMS client distributing
                                information about capabilities of each
                                node to each other node. </span><o:p></o:p></p>
                            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A"> </span><o:p></o:p></p>
                            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A"> </span><o:p></o:p></p>
                            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">Regards,</span><o:p></o:p></p>
                            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">Sasha</span><o:p></o:p></p>
                            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A"> </span><o:p></o:p></p>
                            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">Office:
                                +972-39266302</span><o:p></o:p></p>
                            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">Cell:     
                                +972-549266302</span><o:p></o:p></p>
                            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A">Email:  
                                <a moz-do-not-send="true"
                                  href="mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a></span><o:p></o:p></p>
                            <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#44546A"> </span><o:p></o:p></p>
                            <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">
                                Greg Mirsky [<a moz-do-not-send="true"
                                  href="mailto:gregimirsky@gmail.com">mailto:gregimirsky@gmail.com</a>]
                                <br>
                                <b>Sent:</b> Thursday, January 19, 2017
                                6:01 PM<br>
                                <b>To:</b> Les Ginsberg (ginsberg) &lt;<a
                                  moz-do-not-send="true"
                                  href="mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
                                <b>Cc:</b> Acee Lindem (acee) &lt;<a
                                  moz-do-not-send="true"
                                  href="mailto:acee@cisco.com">acee@cisco.com</a>&gt;;
                                Robert Sparks &lt;<a
                                  moz-do-not-send="true"
                                  href="mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;;
                                <a moz-do-not-send="true"
                                  href="mailto:mpls@ietf.org">mpls@ietf.org</a>;
                                <a moz-do-not-send="true"
                                  href="mailto:gen-art@ietf.org">
                                  gen-art@ietf.org</a>; <a
                                  moz-do-not-send="true"
                                  href="mailto:draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a
                                  moz-do-not-send="true"
                                  href="mailto:ietf@ietf.org">ietf@ietf.org</a>;
                                <a moz-do-not-send="true"
                                  href="mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>;
                                Abhay Roy (akr) &lt;<a
                                  moz-do-not-send="true"
                                  href="mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
                                <b>Subject:</b> Re: [mpls] Review of
                                draft-ietf-mpls-residence-time-12</span><o:p></o:p></p>
                            <p class="MsoNormal"><span
                                style="color:black"> </span><o:p></o:p></p>
                            <div>
                              <p class="MsoNormal"><span
                                  style="color:black">Hi Les,</span><o:p></o:p></p>
                              <div>
                                <p class="MsoNormal"><span
                                    style="color:black">I believe that
                                    IGP extensions to advertise RTM
                                    capability are required.</span><o:p></o:p></p>
                              </div>
                              <div>
                                <p class="MsoNormal"><span
                                    style="color:black"> </span><o:p></o:p></p>
                              </div>
                              <div>
                                <p class="MsoNormal"><span
                                    style="color:black">Regards,</span><o:p></o:p></p>
                              </div>
                              <div>
                                <p class="MsoNormal"><span
                                    style="color:black">Greg</span><o:p></o:p></p>
                              </div>
                            </div>
                            <div>
                              <p class="MsoNormal"><span
                                  style="color:black"> </span><o:p></o:p></p>
                              <div>
                                <p class="MsoNormal"><span
                                    style="color:black">On Thu, Jan 19,
                                    2017 at 7:57 AM, Les Ginsberg
                                    (ginsberg) &lt;<a
                                      moz-do-not-send="true"
                                      href="mailto:ginsberg@cisco.com"
                                      target="_blank">ginsberg@cisco.com</a>&gt;
                                    wrote:</span><o:p></o:p></p>
                                <blockquote
                                  style="border:none;border-left:solid
                                  #CCCCCC 1.0pt;padding:0cm 0cm 0cm
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
                                  <div>
                                    <div>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Greg
                                          –</span><o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">I
                                          am having trouble
                                          understanding your response.</span><o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">The
                                          question we are raising is
                                          whether we should extend the
                                          IGPs to support advertising
                                          RTM capability – an
                                          alternative being to retrieve
                                          the capability via network
                                          management.</span><o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Saying
                                          that the IGP functionality is
                                          optional and/or wouldn’t
                                          always be advertised doesn’t
                                          really answer the question of
                                          whether we should or should
                                          not define the IGP extensions.</span><o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Could
                                          you respond more directly to
                                          this point?</span><o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">  
                                          Les</span><o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                                      <p class="MsoNormal"
                                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> </span><o:p></o:p></p>
                                      <div
                                        style="border:none;border-left:solid
                                        blue 1.5pt;padding:0cm 0cm 0cm
                                        4.0pt">
                                        <div>
                                          <div
                                            style="border:none;border-top:solid
                                            #B5C4DF 1.0pt;padding:3.0pt
                                            0cm 0cm 0cm">
                                            <p class="MsoNormal"
                                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">From:</span></b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">
                                                Greg Mirsky [mailto:<a
                                                  moz-do-not-send="true"
href="mailto:gregimirsky@gmail.com" target="_blank">gregimirsky@gmail.com</a>]
                                                <br>
                                                <b>Sent:</b> Thursday,
                                                January 19, 2017 7:44 AM<br>
                                                <b>To:</b> Acee Lindem
                                                (acee)<br>
                                                <b>Cc:</b> Robert
                                                Sparks; <a
                                                  moz-do-not-send="true"
href="mailto:mpls@ietf.org" target="_blank">mpls@ietf.org</a>;
                                                <a
                                                  moz-do-not-send="true"
href="mailto:gen-art@ietf.org" target="_blank">gen-art@ietf.org</a>; <a
                                                  moz-do-not-send="true"
href="mailto:draft-ietf-mpls-residence-time.all@ietf.org"
                                                  target="_blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a
                                                  moz-do-not-send="true"
href="mailto:ietf@ietf.org" target="_blank">
                                                  ietf@ietf.org</a>; Les
                                                Ginsberg (ginsberg); <a
                                                  moz-do-not-send="true"
href="mailto:isis-chairs@ietf.org" target="_blank">
                                                  isis-chairs@ietf.org</a>;
                                                Abhay Roy (akr)</span><o:p></o:p></p>
                                            <div>
                                              <div>
                                                <p class="MsoNormal"><span
                                                    style="color:black"><br>
                                                    <b>Subject:</b> Re:
                                                    [mpls] Review of
                                                    draft-ietf-mpls-residence-time-12</span><o:p></o:p></p>
                                              </div>
                                            </div>
                                          </div>
                                        </div>
                                        <div>
                                          <div>
                                            <p class="MsoNormal"
                                              style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                style="color:black"> </span><o:p></o:p></p>
                                            <div>
                                              <p class="MsoNormal"
                                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                  style="color:black">Hi
                                                  Acee,</span><o:p></o:p></p>
                                              <div>
                                                <p class="MsoNormal"
                                                  style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                    style="color:black">the
                                                    draft defines
                                                    optional
                                                    functionality. If an
                                                    operator has no use
                                                    neither for PTP's
                                                    Transparent Clock,
                                                    nor RTM itself as
                                                    performance metric,
                                                    then RTM sub-TLV
                                                    would not be
                                                    included and thus it
                                                    would not be
                                                    flooded. Of course,
                                                    it be right to
                                                    reflect RTM
                                                    capability through
                                                    YANG data model,
                                                    thus allowing SDN
                                                    scenario you've
                                                    described.</span><o:p></o:p></p>
                                              </div>
                                              <div>
                                                <p class="MsoNormal"
                                                  style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                    style="color:black"> </span><o:p></o:p></p>
                                              </div>
                                              <div>
                                                <p class="MsoNormal"
                                                  style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                    style="color:black">Regards,</span><o:p></o:p></p>
                                              </div>
                                              <div>
                                                <p class="MsoNormal"
                                                  style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                    style="color:black">Greg</span><o:p></o:p></p>
                                              </div>
                                            </div>
                                            <div>
                                              <p class="MsoNormal"
                                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                  style="color:black"> </span><o:p></o:p></p>
                                              <div>
                                                <p class="MsoNormal"
                                                  style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                    style="color:black">On
                                                    Wed, Jan 18, 2017 at
                                                    2:51 PM, Acee Lindem
                                                    (acee) &lt;<a
                                                      moz-do-not-send="true"
href="mailto:acee@cisco.com" target="_blank">acee@cisco.com</a>&gt;
                                                    wrote:</span><o:p></o:p></p>
                                                <div>
                                                  <div>
                                                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Hi
                                                        Greg, </span><o:p></o:p></p>
                                                  </div>
                                                  <div>
                                                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                                                  </div>
                                                  <div>
                                                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Although
                                                        it is a bit
                                                        late, we’ve had
                                                        some discussions
                                                        amongst the
                                                        IS-IS and OSPF
                                                        chairs and are
                                                        wondering
                                                        whether the
                                                        interface
                                                        capability
                                                        belongs in the
                                                        IGPs. This will
                                                        be flooded
                                                        throughout the
                                                        entire routing
                                                        domain – is it
                                                        really needed on
                                                        every node or
                                                        will it the RTM
                                                        testing be
                                                        initiated from
                                                        an omniscient
                                                        NMS client that
                                                        would know the
                                                        capabilities of
                                                        each node or
                                                        easily query
                                                        them using
                                                        YANG? </span><o:p></o:p></p>
                                                  </div>
                                                  <div>
                                                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                                                  </div>
                                                  <div>
                                                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Thanks,</span><o:p></o:p></p>
                                                  </div>
                                                  <div>
                                                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Acee
                                                         </span><o:p></o:p></p>
                                                  </div>
                                                  <div>
                                                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                                                  </div>
                                                  <div
                                                    style="border:none;border-top:solid
                                                    #B5C4DF
                                                    1.0pt;padding:3.0pt
                                                    0cm 0cm 0cm">
                                                    <p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">From:
                                                        </span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">mpls
                                                        &lt;<a
                                                          moz-do-not-send="true"
href="mailto:mpls-bounces@ietf.org" target="_blank">mpls-bounces@ietf.org</a>&gt;
                                                        on behalf of
                                                        Greg Mirsky &lt;<a
moz-do-not-send="true" href="mailto:gregimirsky@gmail.com"
                                                          target="_blank">gregimirsky@gmail.com</a>&gt;<br>
                                                        <b>Date: </b>Wednesday,
                                                        January 18, 2017
                                                        at 1:25 PM<br>
                                                        <b>To: </b>Robert
                                                        Sparks &lt;<a
                                                          moz-do-not-send="true"
href="mailto:rjsparks@nostrum.com" target="_blank">rjsparks@nostrum.com</a>&gt;<br>
                                                        <b>Cc: </b>"<a
moz-do-not-send="true" href="mailto:mpls@ietf.org" target="_blank">mpls@ietf.org</a>"
                                                        &lt;<a
                                                          moz-do-not-send="true"
href="mailto:mpls@ietf.org" target="_blank">mpls@ietf.org</a>&gt;, "<a
                                                          moz-do-not-send="true"
href="mailto:gen-art@ietf.org" target="_blank">gen-art@ietf.org</a>"
                                                        &lt;<a
                                                          moz-do-not-send="true"
href="mailto:gen-art@ietf.org" target="_blank">gen-art@ietf.org</a>&gt;,
                                                        "<a
                                                          moz-do-not-send="true"
href="mailto:draft-ietf-mpls-residence-time.all@ietf.org"
                                                          target="_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>"
                                                        &lt;<a
                                                          moz-do-not-send="true"
href="mailto:draft-ietf-mpls-residence-time.all@ietf.org"
                                                          target="_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;,
                                                        "<a
                                                          moz-do-not-send="true"
href="mailto:ietf@ietf.org" target="_blank">ietf@ietf.org</a>" &lt;<a
                                                          moz-do-not-send="true"
href="mailto:ietf@ietf.org" target="_blank">ietf@ietf.org</a>&gt;<br>
                                                        <b>Subject: </b>Re:
                                                        [mpls] Review of
draft-ietf-mpls-residence-time-12</span><o:p></o:p></p>
                                                  </div>
                                                  <div>
                                                    <div>
                                                      <div>
                                                        <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                                                      </div>
                                                      <blockquote
                                                        style="border:none;border-left:solid
                                                        #B5C4DF
                                                        4.5pt;padding:0cm
                                                        0cm 0cm
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt"
id="m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
                                                        <div>
                                                          <div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Hi
                                                          Robert,
                                                          </span><o:p></o:p></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">thank
                                                          you for the
                                                          most expedient
                                                          review and
                                                          comments. I'll
                                                          make changes
                                                          in Section 2
                                                          per your
                                                          suggestion.</span><o:p></o:p></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Regards,</span><o:p></o:p></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Greg</span><o:p></o:p></p>
                                                          </div>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">On
                                                          Wed, Jan 18,
                                                          2017 at 10:34
                                                          AM, Robert
                                                          Sparks &lt;<a
moz-do-not-send="true" href="mailto:rjsparks@nostrum.com"
                                                          target="_blank">rjsparks@nostrum.com</a>&gt;
                                                          wrote:</span><o:p></o:p></p>
                                                          <div>
                                                          <p><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">The
                                                          changes all
                                                          look good.</span><o:p></o:p></p>
                                                          <p><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">I
                                                          still think
                                                          you should say
                                                          something in
                                                          the document
                                                          about what
                                                          "the time of
                                                          packet
                                                          arrival" and
                                                          "transmission"
                                                          means, and
                                                          call out the
                                                          point you made
                                                          about being
                                                          careful to not
                                                          introduce
                                                          apparent
                                                          jitter by not
                                                          making those
                                                          measurements
                                                          consistently.
                                                          (The
                                                          definitions
                                                          you point to
                                                          in your
                                                          earlier mail
                                                          from G.8013
                                                          don't really
                                                          help - they
                                                          just say "time
                                                          of packet
                                                          arrival".
                                                          Again, the
                                                          first and last
                                                          bit are likely
                                                          to be several
                                                          nanoseconds
                                                          apart so I
                                                          think it
                                                          matters.
                                                          Perhaps you're
                                                          saying it
                                                          doesn't matter
                                                          as long as
                                                          each node is
                                                          consistent
                                                          (there will be
                                                          error in the
                                                          residence time
                                                          measurement,
                                                          but it will be
                                                          constant at
                                                          each node, so
                                                          the sum of
                                                          errors will be
                                                          constant, and
                                                          the clocks
                                                          will be ok?)</span><o:p></o:p></p>
                                                          <p><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Please
                                                          look at the
                                                          new first
                                                          paragraph of
                                                          section 2 -
                                                          there's a mix
                                                          of "as case"
                                                          and "in case"
                                                          that should be
                                                          made
                                                          consistent. I
                                                          suspect it
                                                          would be
                                                          easiest to
                                                          simply say
                                                          "referred to
                                                          as using a
                                                          one-step
                                                          clock" and
                                                          "referred to
                                                          as using a
                                                          two-step
                                                          clock" or
                                                          similar.</span><o:p></o:p></p>
                                                          <p><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">RjS</span><o:p></o:p></p>
                                                          <div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">On
                                                          1/18/17 12:03
                                                          PM, Greg
                                                          Mirsky wrote:</span><o:p></o:p></p>
                                                          </div>
                                                          <blockquote
                                                          style="margin-top:5.0pt;margin-bottom:5.0pt">
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Hi
                                                          Robert,
                                                          </span><o:p></o:p></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Sasha
                                                          Vainshtein
                                                          came with
                                                          elegant idea
                                                          to address
                                                          disconnection
                                                          between
                                                          discussion of
                                                          one-step and
                                                          two-step modes
                                                          that you've
                                                          pointed out.
                                                          We've moved
                                                          Section 7 as
                                                          sub-section
                                                          into Section 2
                                                          now. Attached
                                                          are updated
                                                          diff and the
                                                          proposed new
                                                          version -13.</span><o:p></o:p></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Regards,</span><o:p></o:p></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Greg</span><o:p></o:p></p>
                                                          </div>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">On
                                                          Wed, Jan 18,
                                                          2017 at 8:13
                                                          AM, Greg
                                                          Mirsky &lt;<a
moz-do-not-send="true" href="mailto:gregimirsky@gmail.com"
                                                          target="_blank">gregimirsky@gmail.com</a>&gt;
                                                          wrote:</span><o:p></o:p></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Hi
                                                          Robert,
                                                          </span><o:p></o:p></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">once
                                                          again, thank
                                                          you for your
                                                          thorough
                                                          review and the
                                                          most detailed
                                                          comments. I've
                                                          prepared
                                                          updated
                                                          version and
                                                          would greatly
                                                          appreciate if
                                                          you review the
                                                          changes and
                                                          let us know
                                                          whether your
                                                          comments been
                                                          addressed.
                                                          Attached are
                                                          diff and the
                                                          new version.</span><o:p></o:p></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Regards,</span><o:p></o:p></p>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Greg</span><o:p></o:p></p>
                                                          </div>
                                                          </div>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                                                          <div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">On
                                                          Wed, Jan 11,
                                                          2017 at 7:48
                                                          AM, Robert
                                                          Sparks &lt;<a
moz-do-not-send="true" href="mailto:rjsparks@nostrum.com"
                                                          target="_blank">rjsparks@nostrum.com</a>&gt;
                                                          wrote:</span><o:p></o:p></p>
                                                          <div>
                                                          <div>
                                                          <blockquote
                                                          style="border:none;border-left:solid
                                                          #CCCCCC
                                                          1.0pt;padding:0cm
                                                          0cm 0cm
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black">Reviewer:
                                                          Robert Sparks<br>
                                                          Review result:
                                                          Ready with
                                                          Nits<br>
                                                          <br>
                                                          I am the
                                                          assigned
                                                          Gen-ART
                                                          reviewer for
                                                          this draft.
                                                          The General
                                                          Area<br>
                                                          Review Team
                                                          (Gen-ART)
                                                          reviews all
                                                          IETF documents
                                                          being
                                                          processed<br>
                                                          by the IESG
                                                          for the IETF
                                                          Chair.  Please
                                                          treat these
                                                          comments just<br>
                                                          like any other
                                                          last call
                                                          comments.<br>
                                                          <br>
                                                          For more
                                                          information,
                                                          please see the
                                                          FAQ at<br>
                                                          &lt;<a
                                                          moz-do-not-send="true"
href="https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target="_blank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
                                                          <br>
                                                          Document:
                                                          draft-ietf-mpls-residence-time-12<br>
                                                          Reviewer:
                                                          Robert Sparks<br>
                                                          Review Date:
                                                          2017-01-10<br>
                                                          IETF LC End
                                                          Date:
                                                          2017-01-17<br>
                                                          IESG Telechat
                                                          date:
                                                          2017-02-02<br>
                                                          <br>
                                                          Summary: Ready
                                                          (with nits)
                                                          for
                                                          publication as
                                                          a Proposed
                                                          Standard<br>
                                                          <br>
                                                          I have two
                                                          primary
                                                          comments. I
                                                          expect both
                                                          are rooted in
                                                          the authors<br>
                                                          and working
                                                          group knowing
                                                          what the
                                                          document means
                                                          instead of
                                                          seeing<br>
                                                          what<br>
                                                          it says or
                                                          doesn't say:<br>
                                                          <br>
                                                          1) The
                                                          document is
                                                          loose with its
                                                          use of
                                                          'packet', and
                                                          where TTLs<br>
                                                          appear when<br>
                                                          they are
                                                          discussed. It
                                                          might be
                                                          helpful to
                                                          rephrase the
                                                          text that<br>
                                                          speaks<br>
                                                          of RTM packets
                                                          in terms of
                                                          RTM messages
                                                          that are
                                                          encoded as
                                                          G-ACh<br>
                                                          messages and<br>
                                                          not refer to
                                                          packets unless
                                                          you mean the
                                                          whole
                                                          encapsulated
                                                          packet<br>
                                                          with MPLS<br>
                                                          header, ACH,
                                                          and G-ACh
                                                          message.<br>
                                                          <br>
                                                          2) Since this
                                                          new mechanic
                                                          speaks in
                                                          terms of
                                                          fractional
                                                          nanoseconds,<br>
                                                          some<br>
                                                          discussion of
                                                          what
                                                          trigger-point
                                                          you intend
                                                          people to use
                                                          for taking<br>
                                                          the<br>
                                                          precise time
                                                          of a packet's
                                                          arrival or
                                                          departure
                                                          seems
                                                          warranted.
                                                          (The<br>
                                                          first and<br>
                                                          last bit of
                                                          the whole
                                                          encapsulated
                                                          packet above
                                                          are going to
                                                          appear at<br>
                                                          the<br>
                                                          physical layer
                                                          many
                                                          nanoseconds
                                                          apart at OC192
                                                          speeds if I've
                                                          done the<br>
                                                          math<br>
                                                          right). It may
                                                          be obvious to
                                                          the folks
                                                          discussing
                                                          this, but it's
                                                          not<br>
                                                          obvious<br>
                                                          from the
                                                          document.  If
                                                          it's _not_
                                                          obvious and
                                                          variation in
                                                          technique<br>
                                                          is<br>
                                                          expected, then
                                                          some
                                                          discussion
                                                          about issues
                                                          that might
                                                          arise from<br>
                                                          different<br>
                                                          implementation
                                                          choices would
                                                          be welcome.<br>
                                                          <br>
                                                          The rest of
                                                          these are
                                                          editorial
                                                          nits:<br>
                                                          <br>
                                                          It would help
                                                          to pull an
                                                          overview
                                                          description of
                                                          the difference<br>
                                                          between<br>
                                                          one-step and
                                                          two-step much
                                                          earlier in the
                                                          document. I
                                                          suggest in the<br>
                                                          overview<br>
                                                          in section 2.
                                                          Otherwise, the
                                                          reader really
                                                          has to jump
                                                          forward and<br>
                                                          read section<br>
                                                          7 before
                                                          section 3's
                                                          5th bullet
                                                          makes any
                                                          sense.<br>
                                                          <br>
                                                          In section 3,
                                                          "IANA will be
                                                          asked" should
                                                          be made
                                                          active. Say
                                                          "This<br>
                                                          document<br>
                                                          asks IANA to"
                                                          and point to
                                                          the IANA
                                                          consideration
                                                          section. Apply<br>
                                                          similar<br>
                                                          treatment to
                                                          the other
                                                          places where
                                                          you talk about
                                                          future IANA<br>
                                                          actions.<br>
                                                          <br>
                                                          There are
                                                          several places
                                                          where there
                                                          are missing
                                                          words
                                                          (typically<br>
                                                          articles or<br>
                                                          prepositions).
                                                          You're less
                                                          likely to end
                                                          up with
                                                          misinterpretations<br>
                                                          during the<br>
                                                          RFC Editor
                                                          phase if you
                                                          provide them
                                                          before the
                                                          document gets
                                                          that far<br>
                                                          in the<br>
                                                          process. The
                                                          spots I found
                                                          most
                                                          disruptive
                                                          were these
                                                          (this is not<br>
                                                          intended to<br>
                                                          be
                                                          exhaustive):<br>
                                                          <br>
                                                            Section 3:
                                                          "set 1
                                                          according"
                                                          -&gt; "set to
                                                          1 according"<br>
                                                            Section 3:
                                                          "the Table 19
                                                          [IEEE..."
                                                          -&gt; "Table
                                                          19 of
                                                          [IEEE..."<br>
                                                            Section 4.2:
                                                          "Detailed
                                                          discussion of
                                                          ... modes in
                                                          Section 7."<br>
                                                                       
                                                                   
                                                          -&gt;
                                                          "Detailed
                                                          discussion of
                                                          ... modes
                                                          appears<br>
                                                          in Section 7."<br>
                                                            Section 10:
                                                          "most of"
                                                          -&gt; "most of
                                                          all"<br>
                                                          <br>
                                                          In Setion 3.1
                                                          at "identity
                                                          of the source
                                                          port", please
                                                          point into the<br>
                                                          document<br>
                                                          that defines
                                                          this identity
                                                          and its
                                                          representation.
                                                          I suspect this
                                                          is a<br>
                                                          pointer<br>
                                                          into a
                                                          specific
                                                          section in
                                                          IEEE.1588.2008].</span><o:p></o:p></p>
                                                          </blockquote>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                                                          </div>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                                                          </div>
                                                          </blockquote>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          <p
                                                          class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
                                                          </div>
                                                          </div>
                                                        </div>
                                                      </blockquote>
                                                    </div>
                                                  </div>
                                                </div>
                                              </div>
                                              <p class="MsoNormal"
                                                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
                                                  style="color:black"> </span><o:p></o:p></p>
                                            </div>
                                          </div>
                                        </div>
                                      </div>
                                    </div>
                                  </div>
                                </blockquote>
                              </div>
                              <p class="MsoNormal"><span
                                  style="color:black"> </span><o:p></o:p></p>
                            </div>
                          </div>
                        </div>
                      </blockquote>
                    </div>
                  </div>
                </div>
              </blockquote>
            </div>
          </div>
        </div>
      </div>
    </blockquote>
    <br>
  </body>
</html>

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Reviewer: JÃ¼rgen SchÃ¶nwÃ¤lder
Review result: Has Nits

I do not see any major OPS related issues. I am not an MPLS expert
and
this will likely show in my comments. Most of my comments below are
editorial or trying to make the document easier to read for first
time
readers not deeply involved in the work.

- Consider to avoid acronyms in the Abstract. I had to lookup what
  G-ACh and PTP resolve to in order to read the abstract, which I
  think should be avoided.

- The sentence starting 'I.e.' in parenthesis in the Introduction
  almost reads like a definition of Residence Time. Is it useful to
  have this sentence in parenthesis and starting with 'I.e.'? It
would
  be nice to have a clear definition of Residence Time. In fact, my
  reading is that residence time sometimes refers to the per hop
  residence them and sometimes to the accumulated per path residence
  time. Does it make sense to distinguish a Node Residence Time from
a
  Path Residence Time? Or a Residence Time from an Accumulated
  Residence Time?

- While reading section 3, I was wondering what are 1-step nodes and
  what are 2-step nodes? This is later explained in detail inq
section
  7. Perhaps it makes sense to introduce the concept earlier and to
  provide a forward pointer to section 7 for the details.

- I suggest to either always write one-step and two-step or 1-step
and
  2-step. Mixing writing styles makes searching in the text a bit
more
  complicated.

- The document seems to be PTP specific even though there are
  provisions to support other time synchronization protocols. I
  wonder, though, to what extend this would work for lets say NTP.
  There is quite some text refering to the correctionField, which
  seems to be a PTP-specific field.

- s/Scratch Pad filed/Scratch Pad field/

- Does the Interface ID related to other interface numbers, e.g.,
  SNMP's ifIndex? Or is this an entirely separate number space? Or
  does it depend on the implementor's choice?

- In section 7, enumerated item 1, there is a hanging open
parenthesis
  which seem to have to sub-items inside. I suggest to change this by
  s/forthcoming (this/forthcoming. This/

- In section 8.3: s/.  .  /.  /

- It may be useful to add instructions that the RFC editor is
expected
  to replace TBAx in the text once IANA has done the assignments.

- What does 'particularly as applied to use related to PTP' mean?



From nobody Mon Jan 23 08:16:20 2017
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Multiprotocol Label Switching of the IETF.

        Title           : MPLS Flow Identification Considerations
        Authors         : Stewart Bryant
                          Carlos Pignataro
                          Mach Chen
                          Zhenbin Li
                          Gregory Mirsky
	Filename        : draft-ietf-mpls-flow-ident-03.txt
	Pages           : 11
	Date            : 2017-01-23

Abstract:
   This memo discusses the desired capabilities for MPLS flow
   identification.  The key application that needs this is in-band
   performance monitoring of user data packets.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-mpls-flow-ident/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-mpls-flow-ident-03

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-flow-ident-03


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From nobody Mon Jan 23 09:46:30 2017
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Subject: [mpls] Update to a draft in wglc -- Fwd: I-D Action: draft-ietf-mpls-flow-ident-03.txt
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Working Group,

We started the wglc for draft-ietf-mpls-flow-ident earlier today, after 
that was done we found that we had an issue with the mail addresses for
one of the authors.

Version -03 has no other changes than date, version number and the mail
address, as compared to version -02.

/Loa


-------- Forwarded Message --------
Subject: I-D Action: draft-ietf-mpls-flow-ident-03.txt
Date: Mon, 23 Jan 2017 08:16:15 -0800
From: internet-drafts@ietf.org
Reply-To: internet-drafts@ietf.org
To: i-d-announce@ietf.org
CC: mpls@ietf.org


A New Internet-Draft is available from the on-line Internet-Drafts 
directories.
This draft is a work item of the Multiprotocol Label Switching of the IETF.

         Title           : MPLS Flow Identification Considerations
         Authors         : Stewart Bryant
                           Carlos Pignataro
                           Mach Chen
                           Zhenbin Li
                           Gregory Mirsky
	Filename        : draft-ietf-mpls-flow-ident-03.txt
	Pages           : 11
	Date            : 2017-01-23

Abstract:
    This memo discusses the desired capabilities for MPLS flow
    identification.  The key application that needs this is in-band
    performance monitoring of user data packets.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-mpls-flow-ident/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-mpls-flow-ident-03

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-flow-ident-03


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

_______________________________________________
I-D-Announce mailing list
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or ftp://ftp.ietf.org/ietf/1shadow-sites.txt

-- 


Loa Andersson                        email: loa@mail01.huawei.com
Senior MPLS Expert                          loa@pi.nu
Huawei Technologies (consultant)     phone: +46 739 81 21 64


From nobody Mon Jan 23 13:34:52 2017
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Y'all--

I have been selected as the Routing Directorate reviewer for this draft. =
The Routing Directorate seeks to review all routing or routing-related =
drafts as they pass through IETF last call and IESG review, and =
sometimes on special request. The purpose of the review is to provide =
assistance to the Routing ADs. For more information about the Routing =
Directorate, please see =
=E2=80=8Bhttp://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir. Although =
these comments are primarily for the use of the Routing ADs, it would be =
helpful if you could consider them along with any other IETF Last Call =
comments that you receive, and strive to resolve them through discussion =
or by updating the draft.

Document: draft-ietf-mpls-tp-aps-updates-02.txt=20
Reviewer: Russ White
Review Date: 23 January 2017
IETF LC End Date: ??
Intended Status: Standards Track

Summary: No issues found. This document is ready for publication.

The quality and readability of this document is excellent; the draft =
explains what it needs to explain clearly and in precise terms (given =
the reader has read the correct background documents).

Major Issues: No major issues found.

Minor Issues: No minor issues found.

Sincerely --
Russ


From nobody Mon Jan 23 14:23:32 2017
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: "Tarek Saad (tsaad)" <tsaad@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>
Thread-Topic: MPLS Base YANG Module
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--_000_D4ABEA829905Baceeciscocom_
Content-Type: text/plain; charset="Windows-1252"
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Hi Tarek,

Since these are augmentations to the IPv4 and IPv6 unicast RIBs, what opera=
tion would be valid other than imposition (i.e., push)? Also, what is the n=
hlfe-role? I see the role type defined in the expired base MPLS model.

Thanks,
Acee

From: "Tarek Saad (tsaad)" <tsaad@cisco.com<mailto:tsaad@cisco.com>>
Date: Thursday, January 19, 2017 at 9:27 PM
To: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>
Cc: RTG YANG Design Team <rtg-dt-yang-arch@ietf.org<mailto:rtg-dt-yang-arch=
@ietf.org>>, "draft-ietf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-bas=
e-yang@ietf.org>" <draft-ietf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpl=
s-base-yang@ietf.org>>, Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>
Subject: MPLS Base YANG Module

Hi WG/all,

As part of =93draft-ietf-mpls-base-yang=94, we are trying to model the MPLS=
 FTN, NHLFE and ILM tables in YANG.
One proposal is to augment the IETF routing RIB model (rfc8022) for V4 and =
V6 RIBs so IP prefix route also carries the additional MPLS route local lab=
el and remote label bindings per next-hop.
Below highlights the augmentation of the RIB model for V4/V6. For MPLS cros=
s-connects (non-IP mpls routes), we propose those to reside under a new add=
ress-family (MPLS) RIB, by defining a new identity as below.
Let us know if you have feedback/comments on this proposal.


Example IPv4 RIB augmention for MPLS (highlighted in yellow):

   |  +--ro ribs
   |     +--ro rib* [name]
   |        +--ro name              string
   |        +--ro address-family    identityref
   |        +--ro default-rib?      boolean {multiple-ribs}?
   |        +--ro routes
   |        |  +--ro route*
   |        |     +--ro route-preference?          route-preference
   |        |     +--ro next-hop
   |        |     |  +--ro (next-hop-options)
   |        |     |     +--:(simple-next-hop)
   |        |     |     |  +--ro outgoing-interface?      if:interface-stat=
e-ref
   |        |     |     |  +--ro v4ur:next-hop-address?   inet:ipv4-address
   |        |     |     |  +--ro mpls:remote-labels*    mpls-label
   |        |     |     |  +--ro mpls:operation?          label-operation
   |        |     |     +--:(special-next-hop)
   |        |     |     |  +--ro special-next-hop?        enumeration
   |        |     |     +--:(next-hop-list)
   |        |     |        +--ro next-hop-list
   |        |     |           +--ro next-hop*
   |        |     |              +--ro outgoing-interface?     if:interface=
-state-ref
   |        |     |              +--ro v4ur:address?           inet:ipv4-ad=
dress
   |        |     |              +--ro mpls:index?             string
   |        |     |              +--ro mpls:backup-index?      string
   |        |     |              +--ro mpls:role?              nhlfe-role
   |        |     |              +--ro mpls:outgoing-labels*   mpls-label
   |        |     |              +--ro mpls:operation?         label-operat=
ion
   |        |     +--ro source-protocol            identityref
   |        |     +--ro active?                    empty
   |        |     +--ro last-updated?              yang:date-and-time
   |        |     +--ro v4ur:destination-prefix?   inet:ipv4-prefix
   |        |     +--ro mpls:local-label?       mpls-label


For MPLS cross-connects (non-IP mpls routes), we propose to reside under a =
new address-family (MPLS) RIB, by defining a new identity as below:

  identity mpls {
    base rt:address-family;
    description
      "This identity represents the MPLS address family.";
  }

Regards,
Tarek

From: "Acee Lindem (acee)" <acee@cisco.com<mailto:acee@cisco.com>>
Date: Friday, January 6, 2017 at 12:33 PM
To: Tarek Saad <tsaad@cisco.com<mailto:tsaad@cisco.com>>, "draft-ietf-mpls-=
base-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ietf.org>" <draft-ietf-=
mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ietf.org>>
Cc: RTG YANG Design Team <rtg-dt-yang-arch@ietf.org<mailto:rtg-dt-yang-arch=
@ietf.org>>, Loa Andersson <loa@pi.nu<mailto:loa@pi.nu>>, "xufeng.liu.ietf@=
gmail.com<mailto:xufeng.liu.ietf@gmail.com>" <xufeng.liu.ietf@gmail.com<mai=
lto:xufeng.liu.ietf@gmail.com>>
Subject: Re: [Rtg-dt-yang-arch] MPLS Base YANG Module



From: "Tarek Saad (tsaad)" <tsaad@cisco.com<mailto:tsaad@cisco.com>>
Date: Friday, January 6, 2017 at 12:00 PM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, "draft-ietf-mpls-b=
ase-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ietf.org>" <draft-ietf-m=
pls-base-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ietf.org>>
Cc: RTG YANG Design Team <rtg-dt-yang-arch@ietf.org<mailto:rtg-dt-yang-arch=
@ietf.org>>, Loa Andersson <loa@pi.nu<mailto:loa@pi.nu>>, "xufeng.liu.ietf@=
gmail.com<mailto:xufeng.liu.ietf@gmail.com>" <xufeng.liu.ietf@gmail.com<mai=
lto:xufeng.liu.ietf@gmail.com>>
Subject: Re: [Rtg-dt-yang-arch] MPLS Base YANG Module

Also for completeness, the model in =93draft-ietf-i2rs-rib-data-model=94 se=
ems to present a =93single=94 list of routes that contain all the different=
 route-types (including MPLS routes).. It was mentioned that there are disc=
ussions between authors of =93draft-ietf-i2rs-rib-data-model=94 and draft-i=
etf-netmod-routing-cfg=94. Has anything emerged that can help us steer the =
MPLS augmentation?

You should align with RFC 8022 where there is a separate model per address =
family.

Thanks,
Acee




   +--rw route-list* [route-index]
      +--rw route-index                uint64
      +--rw match
      |  +--rw (route-type)?
      |     +--:(ipv4)
      |     |  +--rw ipv4
      |     |     +--rw (ip-route-match-type)?
      |     |        +--:(dest-ipv4-address)
      |     |        |  ...
      |     |        +--:(src-ipv4-address)
      |     |        |  ...
      |     |        +--:(dest-src-ipv4-address)
      |     |           ...
      |     +--:(ipv6)
      |     |  +--rw ipv6
      |     |     +--rw (ip-route-match-type)?
      |     |        +--:(dest-ipv6-address)
      |     |        |  ...
      |     |        +--:(src-ipv6-address)
      |     |        |  ...
      |     |        +--:(dest-src-ipv6-address)
      |     |           ...
      |     +--:(mpls-route)
      |     |  +--rw mpls-label              uint32
      |     +--:(mac-route)
      |     |  +--rw mac-address             uint32
      |     +--:(interface-route)
      |        +--rw interface-identifier if:interface-ref

Regards,
Tarek

From: Tarek Saad <tsaad@cisco.com<mailto:tsaad@cisco.com>>
Date: Friday, January 6, 2017 at 11:53 AM
To: "Acee Lindem (acee)" <acee@cisco.com<mailto:acee@cisco.com>>, "draft-ie=
tf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ietf.org>" <dra=
ft-ietf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ietf.org>>
Cc: RTG YANG Design Team <rtg-dt-yang-arch@ietf.org<mailto:rtg-dt-yang-arch=
@ietf.org>>, Loa Andersson <loa@pi.nu<mailto:loa@pi.nu>>, "xufeng.liu.ietf@=
gmail.com<mailto:xufeng.liu.ietf@gmail.com>" <xufeng.liu.ietf@gmail.com<mai=
lto:xufeng.liu.ietf@gmail.com>>
Subject: Re: [Rtg-dt-yang-arch] MPLS Base YANG Module

Thanks Acee for your review and comments. The authors met and we discussed =
your comments, see below for more..

>> I really only have one comment and that is that the =93config false=94 v=
ersion of interface-mpls need not be replicated in both the rt:routing and =
rt:routing-state trees.
We discussed this and have some concerns due to potential upcoming changes =
discussed at netmod group. Xufeng will follow up on this thread regarding t=
his.

>> when some of the MPLS operational state will be added? The obvious examp=
les are the ILM, FTN, and NHLFEs.
We=92ve been discussing this, and we have some initial implementation of th=
e tables under mpls @ https://github.com/ietf-mpls-yang/te/blob/master/ietf=
-mpls.yang.tree.. However, we=92re also discussing the possibility of augme=
nting RIB for MPLS routes (see below) as you pointed..

>> One view is that the ILM, FTN, and NHLFEs could be provided via an augme=
ntation to the RIB=85
It is possible to have MPLS FTN table realized as an augmentation to existi=
ng IPv4 and IPv6 RIBs models defined in =93draft-ietf-netmod-routing-cfg=94=
. However, for pure MPLS-routes (keyed by label or aka the ILM table), this=
 would require a new separate list of routes (new address family?) and a ne=
w =93MPLS=94 RIB. In section 5.1 of =93draft-ietf-netmod-routing-cfg=94, th=
e routes have mandatory =93destination-prefix=94 attribute, and one way to =
have the MPLS route list is to redefine =93destination-prefix=94 so it sign=
ifies the MPLS incoming label for MPLS routes. Any thoughts on this?

Regards,
Tarek and co-authors


From: "Acee Lindem (acee)" <acee@cisco.com<mailto:acee@cisco.com>>
Date: Friday, December 23, 2016 at 12:59 PM
To: "Acee Lindem (acee)" <acee@cisco.com<mailto:acee@cisco.com>>, "draft-ie=
tf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ietf.org>" <dra=
ft-ietf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ietf.org>>
Cc: RTG YANG Design Team <rtg-dt-yang-arch@ietf.org<mailto:rtg-dt-yang-arch=
@ietf.org>>, Loa Andersson <loa@pi.nu<mailto:loa@pi.nu>>
Subject: Re: [Rtg-dt-yang-arch] MPLS Base YANG Module
Resent-From: <alias-bounces@ietf.org<mailto:alias-bounces@ietf.org>>
Resent-To: <jescia.chenxia@huawei.com<mailto:jescia.chenxia@huawei.com>>, <=
bin_wen@cable.comcast.com<mailto:bin_wen@cable.comcast.com>>, <igor.bryskin=
@huawei.com<mailto:igor.bryskin@huawei.com>>, <vbeeram@juniper.net<mailto:v=
beeram@juniper.net>>, <xufeng.liu.ietf@gmail.com<mailto:xufeng.liu.ietf@gma=
il.com>>, <rgandhi@cisco.com<mailto:rgandhi@cisco.com>>, <skraza@cisco.com<=
mailto:skraza@cisco.com>>, Tarek Saad <tsaad@cisco.com<mailto:tsaad@cisco.c=
om>>, <raqib@brocade.com<mailto:raqib@brocade.com>>
Resent-Date: Friday, December 23, 2016 at 12:59 PM



From: Rtg-dt-yang-arch <rtg-dt-yang-arch-bounces@ietf.org<mailto:rtg-dt-yan=
g-arch-bounces@ietf.org>> on behalf of Acee Lindem <acee@cisco.com<mailto:a=
cee@cisco.com>>
Date: Friday, December 23, 2016 at 12:52 PM
To: "draft-ietf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ie=
tf.org>" <draft-ietf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-base-ya=
ng@ietf.org>>
Cc: RTG YANG Design Team <rtg-dt-yang-arch@ietf.org<mailto:rtg-dt-yang-arch=
@ietf.org>>, Loa Andersson <loa@pi.nu<mailto:loa@pi.nu>>
Subject: [Rtg-dt-yang-arch] MPLS Base YANG Module

Hi Authors,

Loa asked if I would do a review of the base MPLS YANG document. I really o=
nly have one comment and that is that the =93config false=94 version of int=
erface-mpls need not be replicated in both the rt:routing and rt:routing-st=
ate trees. For consistency, I=92d recommend removing it from rt:routing.

I=92d also ask where and when some of the MPLS operational state will be ad=
ded? The obvious examples are the ILM, FTN, and NHLFEs.

One view is that the ILM, FTN, and NHLFEs could be provided via an augmenta=
tion to the RIB=85




Thanks,
Acee

--_000_D4ABEA829905Baceeciscocom_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div>Hi Tarek,&nbsp;</div>
<div><br>
</div>
<div>Since these are augmentations to the IPv4 and IPv6 unicast RIBs, what =
operation would be valid other than imposition (i.e., push)? Also, what is =
the nhlfe-role? I see the role type defined in the expired base MPLS model.=
&nbsp;</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Acee&nbsp;</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>&quot;Tarek Saad (tsaad)&quot=
; &lt;<a href=3D"mailto:tsaad@cisco.com">tsaad@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Thursday, January 19, 2017 at=
 9:27 PM<br>
<span style=3D"font-weight:bold">To: </span>&quot;<a href=3D"mailto:mpls@ie=
tf.org">mpls@ietf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@i=
etf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Cc: </span>RTG YANG Design Team &lt;<a hre=
f=3D"mailto:rtg-dt-yang-arch@ietf.org">rtg-dt-yang-arch@ietf.org</a>&gt;, &=
quot;<a href=3D"mailto:draft-ietf-mpls-base-yang@ietf.org">draft-ietf-mpls-=
base-yang@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-base-yan=
g@ietf.org">draft-ietf-mpls-base-yang@ietf.org</a>&gt;,
 Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com</a>&gt;<b=
r>
<span style=3D"font-weight:bold">Subject: </span>MPLS Base YANG Module<br>
</div>
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
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<div bgcolor=3D"white" lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Hi WG/all,<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri"><o:p>&nbsp;</o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">As part of =93dr=
aft-ietf-mpls-base-yang=94, we are trying to model the MPLS FTN, NHLFE and =
ILM tables in YANG.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">One proposal is =
to augment the IETF routing RIB model (rfc8022) for V4 and V6 RIBs so IP pr=
efix route also carries the additional MPLS route local label and remote la=
bel bindings per next-hop.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Below highlights=
 the augmentation of the RIB model for V4/V6. For MPLS cross-connects (non-=
IP mpls routes), we propose those to reside under a new address-family (MPL=
S) RIB, by defining a new identity as
 below.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Let us know if y=
ou have feedback/comments on this proposal.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri"><o:p>&nbsp;</o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri"><o:p>&nbsp;</o:p=
></span></p>
<p class=3D"MsoNormal"><b><u><span style=3D"font-family:Calibri">Example IP=
v4 RIB augmention for MPLS (highlighted in yellow):<o:p></o:p></span></u></=
b></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri"><o:p>&nbsp;</o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp; &#43;--ro ribs<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp; &#43;--ro rib* [name]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro name&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; string<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro address-family&nbsp;&nbs=
p;&nbsp; identityref<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro default-rib?&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; boolean {multiple-ribs}?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro routes<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; &#43;--ro route*<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; &#43;--r=
o route-preference?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; r=
oute-preference<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; &#43;--r=
o next-hop<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; =
&#43;--ro (next-hop-options)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp; &#43;--:(simple-next-hop)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp; |&nbsp; &#43;--ro outgoing-interface?&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp; if:interface-state-ref<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp; |&nbsp; &#43;--ro v4ur:next-hop-address?&nbsp;&nbsp; inet=
:ipv4-address<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; <sp=
an style=3D"background:yellow;mso-highlight:yellow">
|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; | &nbsp;&nbsp;&nbsp;&nbsp;|&nbs=
p;&nbsp;&nbsp;&nbsp; |&nbsp; &#43;--ro mpls:remote-labels*&nbsp;&nbsp;&nbsp=
; mpls-label<o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri;background:yellow=
;mso-highlight:yellow">&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; &#43;--ro =
mpls:operation?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; label=
-operation</span><span style=3D"font-family:Calibri"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp; &#43;--:(special-next-hop)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp; |&nbsp; &#43;--ro special-next-hop?&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp; enumeration<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp; &#43;--:(next-hop-list)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro next-hop-list<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro next-hop*<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#4=
3;--ro outgoing-interface?&nbsp;&nbsp;&nbsp;&nbsp; if:interface-state-ref<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#4=
3;--ro v4ur:address?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp; inet:ipv4-address<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; <sp=
an style=3D"background:yellow;mso-highlight:yellow">
|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&#43;--ro mpls:index?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; string<o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri;background:yellow=
;mso-highlight:yellow">&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro mpls:backup-index? &nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;string<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri;background:yellow=
;mso-highlight:yellow">&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro mpls:role?&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; nhlfe-role<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri;background:yellow=
;mso-highlight:yellow">&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro mpls:outgoing-labels*&nbsp;&n=
bsp; mpls-label<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri;background:yellow=
;mso-highlight:yellow">&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&#43;--ro mpls:operation?&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; label-operation</span><span style=3D"fon=
t-family:Calibri"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; &#43;--r=
o source-protocol&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp; identityref<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; &#43;--r=
o active?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; empty<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; &#43;--r=
o last-updated?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; yang:date-and-time<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; &#43;--r=
o v4ur:destination-prefix?&nbsp;&nbsp; inet:ipv4-prefix<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; <sp=
an style=3D"background:yellow;mso-highlight:yellow">
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp;&nbsp; &#43;=
--ro mpls:local-label?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; mpls-label</span=
><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri"><o:p>&nbsp;</o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri"><o:p>&nbsp;</o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">For MPLS cross-c=
onnects (non-IP mpls routes), we propose to reside under a new address-fami=
ly (MPLS) RIB, by defining a new identity as below:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri"><o:p>&nbsp;</o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp; identity =
mpls {<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp;&nbs=
p; base rt:address-family;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp;&nbs=
p; description<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp; &quot;This identity represents the MPLS address family.&quot=
;;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp; }<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri"><o:p>&nbsp;</o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Regards,<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Tarek<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri"><o:p>&nbsp;</o:p=
></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-family:Calibri;color:black">F=
rom: </span>
</b><span style=3D"font-family:Calibri;color:black">&quot;Acee Lindem (acee=
)&quot; &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com</a>&gt;<br>
<b>Date: </b>Friday, January 6, 2017 at 12:33 PM<br>
<b>To: </b>Tarek Saad &lt;<a href=3D"mailto:tsaad@cisco.com">tsaad@cisco.co=
m</a>&gt;, &quot;<a href=3D"mailto:draft-ietf-mpls-base-yang@ietf.org">draf=
t-ietf-mpls-base-yang@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-m=
pls-base-yang@ietf.org">draft-ietf-mpls-base-yang@ietf.org</a>&gt;<br>
<b>Cc: </b>RTG YANG Design Team &lt;<a href=3D"mailto:rtg-dt-yang-arch@ietf=
.org">rtg-dt-yang-arch@ietf.org</a>&gt;, Loa Andersson &lt;<a href=3D"mailt=
o:loa@pi.nu">loa@pi.nu</a>&gt;, &quot;<a href=3D"mailto:xufeng.liu.ietf@gma=
il.com">xufeng.liu.ietf@gmail.com</a>&quot; &lt;<a href=3D"mailto:xufeng.li=
u.ietf@gmail.com">xufeng.liu.ietf@gmail.com</a>&gt;<br>
<b>Subject: </b>Re: [Rtg-dt-yang-arch] MPLS Base YANG Module<o:p></o:p></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:Calib=
ri;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:Calibri;color:black"=
>&quot;Tarek Saad (tsaad)&quot; &lt;<a href=3D"mailto:tsaad@cisco.com">tsaa=
d@cisco.com</a>&gt;<br>
<b>Date: </b>Friday, January 6, 2017 at 12:00 PM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, &quot;<a href=3D"mailto:draft-ietf-mpls-base-yang@ietf.org">draft=
-ietf-mpls-base-yang@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mp=
ls-base-yang@ietf.org">draft-ietf-mpls-base-yang@ietf.org</a>&gt;<br>
<b>Cc: </b>RTG YANG Design Team &lt;<a href=3D"mailto:rtg-dt-yang-arch@ietf=
.org">rtg-dt-yang-arch@ietf.org</a>&gt;, Loa Andersson &lt;<a href=3D"mailt=
o:loa@pi.nu">loa@pi.nu</a>&gt;, &quot;<a href=3D"mailto:xufeng.liu.ietf@gma=
il.com">xufeng.liu.ietf@gmail.com</a>&quot; &lt;<a href=3D"mailto:xufeng.li=
u.ietf@gmail.com">xufeng.liu.ietf@gmail.com</a>&gt;<br>
<b>Subject: </b>Re: [Rtg-dt-yang-arch] MPLS Base YANG Module<o:p></o:p></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-right:0cm" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Also for complet=
eness, the model in =93draft-ietf-i2rs-rib-data-model=94 seems to present a=
 =93single=94 list of routes that contain all the different route-types (in=
cluding MPLS routes).. It was mentioned that
 there are discussions between authors of =93draft-ietf-i2rs-rib-data-model=
=94 and draft-ietf-netmod-routing-cfg=94. Has anything emerged that can hel=
p us steer the MPLS augmentation?</span><o:p></o:p></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">You should align with RFC 8022 where there is a sepa=
rate model per address family.&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks,<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">Acee&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-right:0cm" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp; &#43;--rw route-list* [route-inde=
x]</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--rw route=
-index&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp; uint64</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--rw match=
</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; &#43;--=
rw (route-type)?</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; &#43;--:(ipv4)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp; &#43;--rw ipv4</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; &#43;--rw (ip-route-match-type)?</span=
><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--:(dest-ipv4-a=
ddress)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; ...</span><o=
:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--:(src-ipv4-ad=
dress)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; ...</span><o=
:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--:(dest-src-ip=
v4-address)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ..=
.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; &#43;--:(ipv6)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp; &#43;--rw ipv6</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; &#43;--rw (ip-route-match-type)?</span=
><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp; &nbsp;|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--:(dest-ipv6-a=
ddress)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; ...</span><o=
:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--:(src-ipv6-ad=
dress)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; ...</span><o=
:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--:(dest-src-ip=
v6-address)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ..=
.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<span style=3D"background:yellow;mso-highlight:yellow">|&nbsp;&nbsp;&nbsp;&=
nbsp; &#43;--:(mpls-route)</span></span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black;background:yellow;mso-highlight:yellow">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; &#43;--rw mpls-la=
bel&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp; uint32</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; &#43;--:(mac-route)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp; &#43;--rw mac-address&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; uint32</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; &#43;--:(interface-route)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--rw interface-identifier if:interface-re=
f</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Regards,</span><=
o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Tarek</span><o:p=
></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-family:Calibri;color:black">F=
rom: </span>
</b><span style=3D"font-family:Calibri;color:black">Tarek Saad &lt;<a href=
=3D"mailto:tsaad@cisco.com">tsaad@cisco.com</a>&gt;<br>
<b>Date: </b>Friday, January 6, 2017 at 11:53 AM<br>
<b>To: </b>&quot;Acee Lindem (acee)&quot; &lt;<a href=3D"mailto:acee@cisco.=
com">acee@cisco.com</a>&gt;, &quot;<a href=3D"mailto:draft-ietf-mpls-base-y=
ang@ietf.org">draft-ietf-mpls-base-yang@ietf.org</a>&quot; &lt;<a href=3D"m=
ailto:draft-ietf-mpls-base-yang@ietf.org">draft-ietf-mpls-base-yang@ietf.or=
g</a>&gt;<br>
<b>Cc: </b>RTG YANG Design Team &lt;<a href=3D"mailto:rtg-dt-yang-arch@ietf=
.org">rtg-dt-yang-arch@ietf.org</a>&gt;, Loa Andersson &lt;<a href=3D"mailt=
o:loa@pi.nu">loa@pi.nu</a>&gt;, &quot;<a href=3D"mailto:xufeng.liu.ietf@gma=
il.com">xufeng.liu.ietf@gmail.com</a>&quot; &lt;<a href=3D"mailto:xufeng.li=
u.ietf@gmail.com">xufeng.liu.ietf@gmail.com</a>&gt;<br>
<b>Subject: </b>Re: [Rtg-dt-yang-arch] MPLS Base YANG Module</span><o:p></o=
:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Thanks Acee for =
your review and comments. The authors met and we discussed your comments, s=
ee below for more..</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&gt;&gt; I reall=
y only have one comment and that is that the =93config false=94 version of =
interface-mpls need not be replicated in both the rt:routing and rt:routing=
-state trees.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">We discussed thi=
s and have some concerns due to potential upcoming changes discussed at net=
mod group. Xufeng will follow up on this thread regarding this.</span><o:p>=
</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&gt;&gt; when so=
me of the MPLS operational state will be added? The obvious examples are th=
e ILM, FTN, and NHLFEs.&nbsp;
</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">We=92ve been dis=
cussing this, and we have some initial implementation of the tables under m=
pls @
<a href=3D"https://github.com/ietf-mpls-yang/te/blob/master/ietf-mpls.yang.=
tree">https://github.com/ietf-mpls-yang/te/blob/master/ietf-mpls.yang.tree<=
/a>.. However, we=92re also discussing the possibility of augmenting RIB fo=
r MPLS routes (see below) as you pointed..</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&gt;&gt; One vie=
w is that the ILM, FTN, and NHLFEs could be provided via an augmentation to=
 the RIB=85</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">It is possible t=
o have MPLS FTN table realized as an augmentation to existing IPv4 and IPv6=
 RIBs models defined in =93draft-ietf-netmod-routing-cfg=94. However, for p=
ure MPLS-routes (keyed by label or aka the
 ILM table), this would require a new separate list of routes (new address =
family?) and a new =93MPLS=94 RIB. In section 5.1 of =93draft-ietf-netmod-r=
outing-cfg=94, the routes have mandatory =93destination-prefix=94 attribute=
, and one way to have the MPLS route list is
 to redefine =93destination-prefix=94 so it signifies the MPLS incoming lab=
el for MPLS routes. Any thoughts on this?</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Regards,</span><=
o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Tarek and co-aut=
hors</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-family:Calibri;color:black">F=
rom: </span>
</b><span style=3D"font-family:Calibri;color:black">&quot;Acee Lindem (acee=
)&quot; &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com</a>&gt;<br>
<b>Date: </b>Friday, December 23, 2016 at 12:59 PM<br>
<b>To: </b>&quot;Acee Lindem (acee)&quot; &lt;<a href=3D"mailto:acee@cisco.=
com">acee@cisco.com</a>&gt;, &quot;<a href=3D"mailto:draft-ietf-mpls-base-y=
ang@ietf.org">draft-ietf-mpls-base-yang@ietf.org</a>&quot; &lt;<a href=3D"m=
ailto:draft-ietf-mpls-base-yang@ietf.org">draft-ietf-mpls-base-yang@ietf.or=
g</a>&gt;<br>
<b>Cc: </b>RTG YANG Design Team &lt;<a href=3D"mailto:rtg-dt-yang-arch@ietf=
.org">rtg-dt-yang-arch@ietf.org</a>&gt;, Loa Andersson &lt;<a href=3D"mailt=
o:loa@pi.nu">loa@pi.nu</a>&gt;<br>
<b>Subject: </b>Re: [Rtg-dt-yang-arch] MPLS Base YANG Module<br>
<b>Resent-From: </b>&lt;<a href=3D"mailto:alias-bounces@ietf.org">alias-bou=
nces@ietf.org</a>&gt;<br>
<b>Resent-To: </b>&lt;<a href=3D"mailto:jescia.chenxia@huawei.com">jescia.c=
henxia@huawei.com</a>&gt;, &lt;<a href=3D"mailto:bin_wen@cable.comcast.com"=
>bin_wen@cable.comcast.com</a>&gt;, &lt;<a href=3D"mailto:igor.bryskin@huaw=
ei.com">igor.bryskin@huawei.com</a>&gt;, &lt;<a href=3D"mailto:vbeeram@juni=
per.net">vbeeram@juniper.net</a>&gt;,
 &lt;<a href=3D"mailto:xufeng.liu.ietf@gmail.com">xufeng.liu.ietf@gmail.com=
</a>&gt;, &lt;<a href=3D"mailto:rgandhi@cisco.com">rgandhi@cisco.com</a>&gt=
;, &lt;<a href=3D"mailto:skraza@cisco.com">skraza@cisco.com</a>&gt;, Tarek =
Saad &lt;<a href=3D"mailto:tsaad@cisco.com">tsaad@cisco.com</a>&gt;,
 &lt;<a href=3D"mailto:raqib@brocade.com">raqib@brocade.com</a>&gt;<br>
<b>Resent-Date: </b>Friday, December 23, 2016 at 12:59 PM</span><o:p></o:p>=
</p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:Calib=
ri;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:Calibri;color:black"=
>Rtg-dt-yang-arch &lt;<a href=3D"mailto:rtg-dt-yang-arch-bounces@ietf.org">=
rtg-dt-yang-arch-bounces@ietf.org</a>&gt; on behalf of Acee Lindem &lt;<a h=
ref=3D"mailto:acee@cisco.com">acee@cisco.com</a>&gt;<br>
<b>Date: </b>Friday, December 23, 2016 at 12:52 PM<br>
<b>To: </b>&quot;<a href=3D"mailto:draft-ietf-mpls-base-yang@ietf.org">draf=
t-ietf-mpls-base-yang@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-m=
pls-base-yang@ietf.org">draft-ietf-mpls-base-yang@ietf.org</a>&gt;<br>
<b>Cc: </b>RTG YANG Design Team &lt;<a href=3D"mailto:rtg-dt-yang-arch@ietf=
.org">rtg-dt-yang-arch@ietf.org</a>&gt;, Loa Andersson &lt;<a href=3D"mailt=
o:loa@pi.nu">loa@pi.nu</a>&gt;<br>
<b>Subject: </b>[Rtg-dt-yang-arch] MPLS Base YANG Module</span><o:p></o:p><=
/p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Calibri;=
color:black">Hi Authors,&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Calibri;=
color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Calibri;=
color:black">Loa asked if I would do a review of the base MPLS YANG documen=
t. I really only have one comment and that is that the =93config false=94 v=
ersion of interface-mpls need not be replicated
 in both the rt:routing and rt:routing-state trees. For consistency, I=92d =
recommend removing it from rt:routing.&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Calibri;=
color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Calibri;=
color:black">I=92d also ask where and when some of the MPLS operational sta=
te will be added? The obvious examples are the ILM, FTN, and NHLFEs. &nbsp;=
</span><o:p></o:p></p>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">One view is that the ILM, FTN, and NHLFEs could be p=
rovided via an augmentation to the RIB=85&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Calibri;=
color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Calibri;=
color:black">Thanks,</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Calibri;=
color:black">Acee&nbsp;</span><o:p></o:p></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</span>
</body>
</html>

--_000_D4ABEA829905Baceeciscocom_--


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From: "Tarek Saad (tsaad)" <tsaad@cisco.com>
To: "Acee Lindem (acee)" <acee@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>
Thread-Topic: MPLS Base YANG Module
Thread-Index: AQHScs0qTJTiarlCFkWDmymLFHzAAKFGqPMAgAEHPgA=
Date: Tue, 24 Jan 2017 14:05:21 +0000
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--_000_98BD05F71D124C449D2E3C87A08578ACciscocom_--


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From: <bruno.decraene@orange.com>
To: Santosh Esale <sesale@juniper.net>, "draft-ietf-mpls-app-aware-tldp@tools.ietf.org" <draft-ietf-mpls-app-aware-tldp@tools.ietf.org>
Thread-Topic: [mpls] Routing directorate review of draft-ietf-mpls-app-aware-tldp
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Subject: Re: [mpls] Routing directorate review of draft-ietf-mpls-app-aware-tldp
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From: "Rajiv Asati (rajiva)" <rajiva@cisco.com>
To: "Tarek Saad (tsaad)" <tsaad@cisco.com>, "Acee Lindem (acee)" <acee@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>
Thread-Topic: [mpls] MPLS Base YANG Module
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Date: Tue, 24 Jan 2017 20:06:16 +0000
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Cc: RTG YANG Design Team <rtg-dt-yang-arch@ietf.org>, "draft-ietf-mpls-base-yang@ietf.org" <draft-ietf-mpls-base-yang@ietf.org>
Subject: Re: [mpls] MPLS Base YANG Module
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From: Eric Gray <eric.gray@ericsson.com>
To: "Acee Lindem (acee)" <acee@cisco.com>, Stewart Bryant <stewart.bryant@gmail.com>, Uma Chunduri <uma.chunduri@huawei.com>, "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, John E Drake <jdrake@juniper.net>,  Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/aPEBBtG9q45Jvce3GgHZaJvUD00>
Cc: "mpls@ietf.org" <mpls@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, "Abhay Roy \(akr\)" <akr@cisco.com>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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--_000_48E1A67CB9CA044EADFEAB87D814BFF64A9C18B9eusaamb107erics_
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Acee,

                Each included node that does not support RTM introduces a v=
ariable delay component.

                This would introduce a potential accuracy impact in conveyi=
ng timing information across a network.

                While it is not necessary to use a path that is composed en=
tirely of RTM capable nodes and links, you can minimize this impact by incl=
uding as few such nodes as possible.  Each such node/link combination that =
can be eliminated improves the accuracy, by reducing the variable component=
.

--
Eric

From: Gen-art [mailto:gen-art-bounces@ietf.org] On Behalf Of Acee Lindem (a=
cee)
Sent: Thursday, January 19, 2017 8:47 PM
To: Stewart Bryant <stewart.bryant@gmail.com>; Uma Chunduri <uma.chunduri@h=
uawei.com>; Les Ginsberg (ginsberg) <ginsberg@cisco.com>; John E Drake <jdr=
ake@juniper.net>; Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>; =
Greg Mirsky <gregimirsky@gmail.com>
Cc: mpls@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; gen-art@ietf.org; d=
raft-ietf-mpls-residence-time.all@ietf.org; Abhay Roy (akr) <akr@cisco.com>
Subject: Re: [Gen-art] [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Stewart,

So you are saying in this use case some element would create a path compose=
d solely of nodes supporting RTM?

Thanks,
Acee

From: Stewart Bryant <stewart.bryant@gmail.com<mailto:stewart.bryant@gmail.=
com>>
Date: Thursday, January 19, 2017 at 5:04 PM
To: Uma Chunduri <uma.chunduri@huawei.com<mailto:uma.chunduri@huawei.com>>,=
 "Les Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>,=
 John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>, Acee Lindem =
<acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshtein <Alexander.Va=
inshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>, Greg Mirsky=
 <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>, "mpls@ietf.org=
<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "isis-chairs=
@ietf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-c=
hairs@ietf.org>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf=
.org<mailto:gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.or=
g<mailto:draft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-res=
idence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org=
>>, Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "iet=
f@ietf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12


Well one scenario is that you would use SR to create the synchronization pa=
th, in which case you would need it to be in the IGP and flooded.

Stewart

On 19/01/2017 19:40, Uma Chunduri wrote:
I support advertising this in IGP.


>This is clearly not TE information -..
>I do not see the IGPs as the appropriate mechanism to flood generic interf=
ace capabilities

We have instances where both the above are not met and we flooded informati=
on.
https://tools.ietf.org/html/rfc7883 (Les, you co-authored the same!!)
https://tools.ietf.org/html/rfc7880

--
Uma C.

From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Les Ginsberg (ginsbe=
rg)
Sent: Thursday, January 19, 2017 9:25 AM
To: John E Drake <jdrake@juniper.net><mailto:jdrake@juniper.net>; Acee Lind=
em (acee) <acee@cisco.com><mailto:acee@cisco.com>; Alexander Vainshtein <Al=
exander.Vainshtein@ecitele.com><mailto:Alexander.Vainshtein@ecitele.com>; G=
reg Mirsky <gregimirsky@gmail.com><mailto:gregimirsky@gmail.com>
Cc: Abhay Roy (akr) <akr@cisco.com><mailto:akr@cisco.com>; mpls@ietf.org<ma=
ilto:mpls@ietf.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; gen=
-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@=
ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>; Robert Sparks=
 <rjsparks@nostrum.com><mailto:rjsparks@nostrum.com>; ietf@ietf.org<mailto:=
ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

For me, this raises the age-old question of when it is/is not appropriate t=
o use IGPs for flooding information.

This is clearly not TE information - you just happen to be using this in co=
njunction with MPLS - but it is a generic capability. I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities. It a=
lso, as Acee has pointed out, results in flooding information to all nodes =
in the domain when only a few care about it.

   Les

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 8:54 AM
To: Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg (gi=
nsberg)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node's RTM capabil=
ities and distribute them to the other nodes is undefined.  Further, one of=
 the ways by which an omniscient controller learns a node's capabilities is=
 by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander=
 Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@e=
citele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.c=
om>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com=
>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I'm sorry but I focused mainly on the OSPF protocol aspects then and didn't=
 question the use case. This question came up in the IS-IS WG discussions.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].










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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Acee,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Each included node that does not su=
pport RTM introduces a variable delay component.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; This would introduce a potential ac=
curacy impact in conveying timing information across a network.<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; While it is not necessary to use a =
path that is composed entirely of RTM capable nodes and links, you can mini=
mize this impact by including as few such nodes
 as possible. &nbsp;Each such node/link combination that can be eliminated =
improves the accuracy, by reducing the variable component.<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">--<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Eric<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Gen-art [mailto:gen-art-bounce=
s@ietf.org]
<b>On Behalf Of </b>Acee Lindem (acee)<br>
<b>Sent:</b> Thursday, January 19, 2017 8:47 PM<br>
<b>To:</b> Stewart Bryant &lt;stewart.bryant@gmail.com&gt;; Uma Chunduri &l=
t;uma.chunduri@huawei.com&gt;; Les Ginsberg (ginsberg) &lt;ginsberg@cisco.c=
om&gt;; John E Drake &lt;jdrake@juniper.net&gt;; Alexander Vainshtein &lt;A=
lexander.Vainshtein@ecitele.com&gt;; Greg Mirsky &lt;gregimirsky@gmail.com&=
gt;<br>
<b>Cc:</b> mpls@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; gen-art@ietf=
.org; draft-ietf-mpls-residence-time.all@ietf.org; Abhay Roy (akr) &lt;akr@=
cisco.com&gt;<br>
<b>Subject:</b> Re: [Gen-art] [mpls] Review of draft-ietf-mpls-residence-ti=
me-12<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi Stewart,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">So you are saying in this use case some=
 element would create a path composed solely of nodes supporting RTM?&nbsp;=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Stewart Bryant &lt;<a href=3D"mailto:stewart.bryant=
@gmail.com">stewart.bryant@gmail.com</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 5:04 PM<br>
<b>To: </b>Uma Chunduri &lt;<a href=3D"mailto:uma.chunduri@huawei.com">uma.=
chunduri@huawei.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a hre=
f=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;, John E Drake &l=
t;<a href=3D"mailto:jdrake@juniper.net">jdrake@juniper.net</a>&gt;,
 Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com</a>&gt;, =
Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@ecitele.com=
">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a href=3D"mail=
to:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;<br>
<b>Cc: </b>&quot;Abhay Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com"=
>akr@cisco.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &=
lt;<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjsparks@nostrum=
.com</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot=
; &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-right:0in" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Well one scenario is that you would use SR to create the sy=
nchronization path, in which case you would need it to be in the IGP and fl=
ooded.<o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Stewart<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">On 19/01/2017 19:40, Uma Chunduri wrote=
:<o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">I support=
 advertising this in IGP.</span></a><span style=3D"color:black"><o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&gt;This is clearly not TE informatio=
n &#8211;..</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&gt;I do not see the IGPs as the appr=
opriate mechanism to flood generic interface capabilities</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We have instances where both the abov=
e are not met and we flooded information.</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black"><a href=3D"https://tools=
.ietf.org/html/rfc7883"><span style=3D"font-size:11.0pt;font-family:&quot;C=
alibri&quot;,sans-serif">https://tools.ietf.org/html/rfc7883</span></a></sp=
an><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:#1F497D">
 (Les, you co-authored the same!!)</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black"><a href=3D"https://tools=
.ietf.org/html/rfc7880"><span style=3D"font-size:11.0pt;font-family:&quot;C=
alibri&quot;,sans-serif">https://tools.ietf.org/html/rfc7880</span></a><o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">--</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Uma C.</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> mpls [=
<a href=3D"mailto:mpls-bounces@ietf.org">mailto:mpls-bounces@ietf.org</a>]
<b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
<b>Sent:</b> Thursday, January 19, 2017 9:25 AM<br>
<b>To:</b> John E Drake <a href=3D"mailto:jdrake@juniper.net">&lt;jdrake@ju=
niper.net&gt;</a>; Acee Lindem (acee)
<a href=3D"mailto:acee@cisco.com">&lt;acee@cisco.com&gt;</a>; Alexander Vai=
nshtein <a href=3D"mailto:Alexander.Vainshtein@ecitele.com">
&lt;Alexander.Vainshtein@ecitele.com&gt;</a>; Greg Mirsky <a href=3D"mailto=
:gregimirsky@gmail.com">
&lt;gregimirsky@gmail.com&gt;</a><br>
<b>Cc:</b> Abhay Roy (akr) <a href=3D"mailto:akr@cisco.com">&lt;akr@cisco.c=
om&gt;</a>; <a href=3D"mailto:mpls@ietf.org">
mpls@ietf.org</a>; <a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf=
.org</a>;
<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>; <a href=3D"mailto=
:draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; Robert Sparks <a href=3D"m=
ailto:rjsparks@nostrum.com">
&lt;rjsparks@nostrum.com&gt;</a>; <a href=3D"mailto:ietf@ietf.org">ietf@iet=
f.org</a><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John &#8211;</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">For me, this raises the age-old quest=
ion of when it is/is not appropriate to use IGPs for flooding information.<=
/span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">This is clearly not TE information &#=
8211; you just happen to be using this in conjunction with MPLS &#8211; but=
 it is a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.</span><span style=3D"color:black"><o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D=
"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black"> John E D=
rake [<a href=3D"mailto:jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Relying on an omniscient controller i=
s a non-starter in general and in particular because the protocol by which =
it would learn each node&#8217;s RTM capabilities and
 distribute them to the other nodes is undefined.&nbsp; Further, one of the=
 ways by which an omniscient controller learns a node&#8217;s capabilities =
is by snooping the link/state database.</span><span style=3D"color:black"><=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vai=
nshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky =
&lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
 Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg=
@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi John,&nbsp;</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">John E Drake &lt;<a href=3D"mailto:jdrake@juniper.n=
et">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@e=
citele.com">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a hr=
ef=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<a hr=
ef=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft=
-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draf=
t-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>=
&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay =
Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<=
br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We discussed all of this with you ove=
r a year ago and used your guidance in adding the indication of RTM capabil=
ity to OSPF.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I&#8217;m sorry but I focused mainly on=
 the OSPF protocol aspects then and didn&#8217;t question the use case. Thi=
s question came up in the IS-IS WG discussions.&nbsp;</span><span style=3D"=
color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Gin=
sberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.c=
om</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I guess what we were trying to envision=
 the use case and whether it makes sense for all the nodes in the IGP routi=
ng domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Additionally, if it is needed in the IG=
Ps, should there also be a BGP-LS Link Attribute TLV proposed?&nbsp;</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee&nbsp;</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Alexander Vainshtein &lt;<a href=3D"mailto:Alexande=
r.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Hi all,</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">I concur with Greg: from my POV an in=
teroperable solution should not depend on an omniscient NMS client distribu=
ting information about capabilities of each node
 to each other node. </span><span style=3D"color:black"><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Regards,</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Sasha</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Office: &#43;972-39266302</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &=
#43;972-549266302</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Greg M=
irsky [<a href=3D"mailto:gregimirsky@gmail.com">mailto:gregimirsky@gmail.co=
m</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Greg &#8211;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">I am having trouble understanding your response.</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The question we are raising is whether we should ex=
tend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Saying that the IGP functionality is optional and/o=
r wouldn&#8217;t always be advertised doesn&#8217;t really answer
 the question of whether we should or should not define the IGP extensions.=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Could you respond more directly to this point?</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black">From:</span></b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black"> Greg Mirsky
 [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimi=
rsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Greg,&nbsp;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Although it is a bit late, we&#8217;ve had some discu=
ssions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Thanks,</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Acee &nbsp;</span><span style=3D"color:black"><o:p></=
o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces@ietf.org" t=
arget=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Greg Mirsky &lt=
;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gma=
il.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">thank you for the most expedient review and comments.=
 I'll make changes in Section 2 per your suggestion.</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks &lt;<=
a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.c=
om</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">The changes all look good.</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">I still think you should say something in the document abou=
t what &quot;the time of packet arrival&quot; and &quot;transmission&quot; =
means, and call out the point you made about being careful to not
 introduce apparent jitter by not making those measurements consistently. (=
The definitions you point to in your earlier mail from G.8013 don't really =
help - they just say &quot;time of packet arrival&quot;. Again, the first a=
nd last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Please look at the new first paragraph of section 2 - there=
's a mix of &quot;as case&quot; and &quot;in case&quot; that should be made=
 consistent. I suspect it would be easiest to simply say &quot;referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">RjS</span><span style=3D"color:black"><o:p></o:p></span></p=
>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</span><span s=
tyle=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Sasha Vainshtein came with elegant idea to address di=
sconnection between discussion of one-step and two-step
 modes that you've pointed out. We've moved Section 7 as sub-section into S=
ection 2 now. Attached are updated diff and the proposed new version -13.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">once again, thank you for your thorough review and th=
e most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks &lt;<a=
 href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].<br>
<br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
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From: Eric Gray <eric.gray@ericsson.com>
To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, Uma Chunduri <uma.chunduri@huawei.com>, John E Drake <jdrake@juniper.net>, "Acee Lindem (acee)" <acee@cisco.com>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Cc: "mpls@ietf.org" <mpls@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, Robert Sparks <rjsparks@nostrum.com>, "Abhay Roy \(akr\)" <akr@cisco.com>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Les,

                While the capability may be of generic value, it is most us=
eful when used to select an explicit path.  We target MPLS in the draft for=
 a large number of reasons, but most importantly because this is the curren=
tly most common mechanism for realistic explicit paths.

                At least as far as I am aware.  :)

                If there are other common approaches to selecting and estab=
lishing an explicit path, it is likely that there will be not much in commo=
n with the specifics for establishing such paths with the means we define i=
n this specification.  That would argue for a separate (set of) draft(s) to=
 support any such other approach(es).

                Also, because the essential enabling capability for doing R=
TM relies heavily (if not entirely) on hardware capabilities (because it is=
 done to packets as they are being forwarded) the capability would most lik=
ely be explicitly tied to specific forwarding technologies, the capability =
will be very much tied to specific hardware capabilities of a hardware inte=
rface.

                While it is relatively easy to imagine a means for generic =
support of RTM, it is not at all certain that this will be common, let alon=
e universal.

--
Eric

From: Les Ginsberg (ginsberg) [mailto:ginsberg@cisco.com]
Sent: Thursday, January 19, 2017 4:46 PM
To: Eric Gray <eric.gray@ericsson.com>; Uma Chunduri <uma.chunduri@huawei.c=
om>; John E Drake <jdrake@juniper.net>; Acee Lindem (acee) <acee@cisco.com>=
; Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>; Greg Mirsky <gre=
gimirsky@gmail.com>
Cc: mpls@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; gen-art@ietf.org; d=
raft-ietf-mpls-residence-time.all@ietf.org; Abhay Roy (akr) <akr@cisco.com>=
; Robert Sparks <rjsparks@nostrum.com>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12
Importance: High

Eric -

From: Eric Gray [mailto:eric.gray@ericsson.com]
Sent: Thursday, January 19, 2017 12:32 PM
To: Les Ginsberg (ginsberg); Uma Chunduri; John E Drake; Acee Lindem (acee)=
; Alexander Vainshtein; Greg Mirsky
Cc: mpls@ietf.org<mailto:mpls@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org=
>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; gen-art@ietf.org<mail=
to:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:dr=
aft-ietf-mpls-residence-time.all@ietf.org>; Abhay Roy (akr); Robert Sparks
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Les,

                It's nice to have a good discussion about technical aspects=
 of a proposed standard, even late in the game.
[Les:] There is context you may not have.
"I" only became aware of this because - as one of the Designated Experts fo=
r IS-IS Registries - I was asked by IANA to approve the allocation of codep=
oints for the GENINFO proposal in the draft.
It would have been better had the IGP WGs been apprised of this draft and a=
sked for feedback earlier in the process - but AFAIK that did not happen. T=
his is a bit strange given that the draft authors include folks with long e=
xperience in MPLS/IGP interworking - but I am not trying to place blame. Fo=
r whatever reason this did not happen.

I do appreciate how late in the game this discussion is - but as I do not p=
ersonally follow MPLS drafts in general I was unaware of this draft until t=
he IANA request was sent.
Too late to fix this now - but something to be considered in the future whe=
n there are IGP extensions involved in MPLS Drafts.

                But I have some difficulty is seeing how this usage is "cle=
arly not TE information."
[Les:] The packet timing capability which you are asking IGPs to advertise =
is a generic capability which could be used for many purposes. The fact tha=
t you are applying it to MPLS LSPs does not make the capability an MPLS/TE =
related capability.

   Les

This information should allow the head-end of an LSP to select a path based=
 on desirable interface capabilities.  For the purposes of accurate time in=
formation, the best path may not also be the shortest path.  Is this not ex=
actly what traffic engineering is about?

As far as extending this argument to the ability to advertise additional li=
nk capabilities, I can easily imagine scenarios where that would make sense=
.  But nobody is suggesting that every LSR (or router for that matter) eith=
er must have this capability for every scenario, or that - having the capab=
ility - it would need to be turned on.

If there is an application or use-case out there that might require adverti=
sing every conceivable interface capability, then vendors will want to take=
 a look at the size of the opportunity represented by that and make a decis=
ion as to whether or not to support this.

--
Eric

From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Les Ginsberg (ginsbe=
rg)
Sent: Thursday, January 19, 2017 3:11 PM
To: Uma Chunduri <uma.chunduri@huawei.com<mailto:uma.chunduri@huawei.com>>;=
 John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Acee Lindem =
(acee) <acee@cisco.com<mailto:acee@cisco.com>>; Alexander Vainshtein <Alexa=
nder.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>; Greg=
 Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: mpls@ietf.org<mailto:mpls@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org=
>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; gen-art@ietf.org<mail=
to:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:dr=
aft-ietf-mpls-residence-time.all@ietf.org>; Abhay Roy (akr) <akr@cisco.com<=
mailto:akr@cisco.com>>; Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks=
@nostrum.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Uma -

I readily admit S-BFD descriptors are - strictly speaking - a violation of =
the "non-routing info" policy - this was publicly acknowledged at the time =
the drafts were written. The exception was justified on the basis that:

  o IGPs are BFD clients
  o The S-BFD discriminator information is unique and extremely modest in s=
ize

What we have here is a proposal to start advertising non-routing related in=
terface attribute information. There is nothing special or unique about RTM=
 - it is simply one of many interface attributes which are generic in natur=
e. Having agreed to advertise RTM in the IGPs, how would you then determine=
 what other interface attributes should/should not be advertised by the IGP=
s? Take a look at your favorite vendors box and see how many interface attr=
ibutes can be configured.
It is also concerning that - when using the IGPs - we flood information whi=
ch must be stored on every node even though the use case for it is limited =
to a much smaller subset.

I think we can and should be smarter in this regard - and given the extensi=
ve work being done to enhance manageability I would like to see us benefit =
from this.

The authors of draft-ietf-mpls-residence-time clearly had some thoughts in =
this regard - which is why they proposed to use RFC 6823 (GENAPP) in IS-IS =
to advertise the information -but the proposal in the draft is flawed in th=
is regard. If we were to head in the "application" direction I would propos=
e a much more generic "application" which is capable of advertising many in=
terface attributes. However this goes back to my original concern - whether=
 we want to use IGPs to flood interface attribute information unrelated to =
routing even if it is segregated under an application. Remember that RFC 68=
23 stipulates that a separate instance of the protocol (a la RFC 6822) be u=
sed for such cases.

   Les


From: Uma Chunduri [mailto:uma.chunduri@huawei.com]
Sent: Thursday, January 19, 2017 11:41 AM
To: Les Ginsberg (ginsberg); John E Drake; Acee Lindem (acee); Alexander Va=
inshtein; Greg Mirsky
Cc: Abhay Roy (akr); mpls@ietf.org<mailto:mpls@ietf.org>; isis-chairs@ietf.=
org<mailto:isis-chairs@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>=
; draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-reside=
nce-time.all@ietf.org>; Robert Sparks; ietf@ietf.org<mailto:ietf@ietf.org>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

I support advertising this in IGP.


>This is clearly not TE information -..
>I do not see the IGPs as the appropriate mechanism to flood generic interf=
ace capabilities

We have instances where both the above are not met and we flooded informati=
on.
https://tools.ietf.org/html/rfc7883 (Les, you co-authored the same!!)
https://tools.ietf.org/html/rfc7880

--
Uma C.

From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Les Ginsberg (ginsbe=
rg)
Sent: Thursday, January 19, 2017 9:25 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Acee Lind=
em (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Alexander Vainshtein <Al=
exander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>; G=
reg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>; mpls@ietf.org<ma=
ilto:mpls@ietf.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; gen=
-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@=
ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>; Robert Sparks=
 <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; ietf@ietf.org<mailto:=
ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

For me, this raises the age-old question of when it is/is not appropriate t=
o use IGPs for flooding information.

This is clearly not TE information - you just happen to be using this in co=
njunction with MPLS - but it is a generic capability. I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities. It a=
lso, as Acee has pointed out, results in flooding information to all nodes =
in the domain when only a few care about it.

   Les

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 8:54 AM
To: Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg (gi=
nsberg)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node's RTM capabil=
ities and distribute them to the other nodes is undefined.  Further, one of=
 the ways by which an omniscient controller learns a node's capabilities is=
 by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander=
 Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@e=
citele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.c=
om>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com=
>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I'm sorry but I focused mainly on the OSPF protocol aspects then and didn't=
 question the use case. This question came up in the IS-IS WG discussions.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].







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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Les,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; While the capability may be of gene=
ric value, it is most useful when used to select an explicit path.&nbsp; We=
 target MPLS in the draft for a large number of reasons,
 but most importantly because this is the currently most common mechanism f=
or realistic explicit paths.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; At least as far as I am aware.&nbsp=
;
</span><span style=3D"font-size:11.0pt;font-family:Wingdings">J</span><span=
 style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; If there are other common approache=
s to selecting and establishing an explicit path, it is likely that there w=
ill be not much in common with the specifics for
 establishing such paths with the means we define in this specification.&nb=
sp; That would argue for a separate (set of) draft(s) to support any such o=
ther approach(es).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Also, because the essential enablin=
g capability for doing RTM relies heavily (if not entirely) on hardware cap=
abilities (because it is done to packets as they
 are being forwarded) the capability would most likely be explicitly tied t=
o specific forwarding technologies, the capability will be very much tied t=
o specific hardware capabilities of a hardware interface.<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; While it is relatively easy to imag=
ine a means for generic support of RTM, it is not at all certain that this =
will be common, let alone universal.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">--<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Eric<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Les Ginsberg (ginsberg) [mailt=
o:ginsberg@cisco.com]
<br>
<b>Sent:</b> Thursday, January 19, 2017 4:46 PM<br>
<b>To:</b> Eric Gray &lt;eric.gray@ericsson.com&gt;; Uma Chunduri &lt;uma.c=
hunduri@huawei.com&gt;; John E Drake &lt;jdrake@juniper.net&gt;; Acee Linde=
m (acee) &lt;acee@cisco.com&gt;; Alexander Vainshtein &lt;Alexander.Vainsht=
ein@ecitele.com&gt;; Greg Mirsky &lt;gregimirsky@gmail.com&gt;<br>
<b>Cc:</b> mpls@ietf.org; ietf@ietf.org; isis-chairs@ietf.org; gen-art@ietf=
.org; draft-ietf-mpls-residence-time.all@ietf.org; Abhay Roy (akr) &lt;akr@=
cisco.com&gt;; Robert Sparks &lt;rjsparks@nostrum.com&gt;<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<br>
<b>Importance:</b> High<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Eric -<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Eric Gray [<a href=3D"mailto:eri=
c.gray@ericsson.com">mailto:eric.gray@ericsson.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 12:32 PM<br>
<b>To:</b> Les Ginsberg (ginsberg); Uma Chunduri; John E Drake; Acee Lindem=
 (acee); Alexander Vainshtein; Greg Mirsky<br>
<b>Cc:</b> <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"m=
ailto:ietf@ietf.org">
ietf@ietf.org</a>; <a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf=
.org</a>;
<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>; <a href=3D"mailto=
:draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; Abhay Roy (akr); Robert Sp=
arks<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Les,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; It&#8217;s nice to have a good disc=
ussion about technical aspects of a proposed standard, even late in the gam=
e.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">[Les:] There is context you may=
 not have.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">&#8220;I&#8221; only became awa=
re of this because &#8211; as one of the Designated Experts for IS-IS Regis=
tries - I was asked by IANA to approve the allocation of codepoints
 for the GENINFO proposal in the draft.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">It would have been better had t=
he IGP WGs been apprised of this draft and asked for feedback earlier in th=
e process &#8211; but AFAIK that did not happen. This
 is a bit strange given that the draft authors include folks with long expe=
rience in MPLS/IGP interworking &#8211; but I am not trying to place blame.=
 For whatever reason this did not happen.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">I do appreciate how late in the=
 game this discussion is &#8211; but as I do not personally follow MPLS dra=
fts in general I was unaware of this draft until the
 IANA request was sent.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">Too late to fix this now &#8211=
; but something to be considered in the future when there are IGP extension=
s involved in MPLS Drafts.</span></i></b><span style=3D"font-size:11.0pt;fo=
nt-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; But I have some difficulty is seein=
g how this usage is &#8220;clearly not TE information.&#8221;&nbsp;
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">[Les:] The packet timing capabi=
lity which you are asking IGPs to advertise is a generic capability which c=
ould be used for many purposes. The fact that
 you are applying it to MPLS LSPs does not make the capability an MPLS/TE r=
elated capability.<o:p></o:p></span></i></b></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></i></b=
></p>
<p class=3D"MsoNormal"><b><i><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp;&nbsp;Les</span></i=
></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-s=
erif;color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif">This information should =
allow the head-end of an LSP to select a path based on desirable interface =
capabilities.&nbsp; For the purposes of accurate time
 information, the best path may not also be the shortest path.&nbsp; Is thi=
s not exactly what traffic engineering is about?<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif">As far as extending this=
 argument to the ability to advertise additional link capabilities, I can e=
asily imagine scenarios where that would make sense.&nbsp;
 But nobody is suggesting that every LSR (or router for that matter) either=
 must have this capability for every scenario, or that &#8211; having the c=
apability &#8211; it would need to be turned on.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif">If there is an applicati=
on or use-case out there that might require advertising every conceivable i=
nterface capability, then vendors will want to take
 a look at the size of the opportunity represented by that and make a decis=
ion as to whether or not to support this.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:.5in"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">--<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Eric<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> mpls [<a href=3D"mailto:mpls-b=
ounces@ietf.org">mailto:mpls-bounces@ietf.org</a>]
<b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
<b>Sent:</b> Thursday, January 19, 2017 3:11 PM<br>
<b>To:</b> Uma Chunduri &lt;<a href=3D"mailto:uma.chunduri@huawei.com">uma.=
chunduri@huawei.com</a>&gt;; John E Drake &lt;<a href=3D"mailto:jdrake@juni=
per.net">jdrake@juniper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mail=
to:acee@cisco.com">acee@cisco.com</a>&gt;; Alexander Vainshtein
 &lt;<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshte=
in@ecitele.com</a>&gt;; Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail=
.com">gregimirsky@gmail.com</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"m=
ailto:ietf@ietf.org">
ietf@ietf.org</a>; <a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf=
.org</a>;
<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>; <a href=3D"mailto=
:draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; Abhay Roy (akr) &lt;<a hre=
f=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;; Robert Sparks &lt;<a href=
=3D"mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Uma &#8211;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">I readily admit S-BFD descriptors are=
 &#8211; strictly speaking - a violation of the &#8220;non-routing info&#82=
21; policy &#8211; this was publicly acknowledged at the time the drafts
 were written. The exception was justified on the basis that:<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp; o IGPs are BFD clients<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp; o The S-BFD discriminator info=
rmation is unique and extremely modest in size<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">What w=
e have here is a proposal to start advertising non-routing related interfac=
e attribute information. There is nothing special
 or unique about RTM &#8211; it is simply one of many interface attributes =
which are generic in nature. Having agreed to advertise RTM in the IGPs, ho=
w would you then determine what other interface attributes should/should no=
t be advertised by the IGPs? Take a look
 at your favorite vendors box and see how many interface attributes can be =
configured.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">It is also concerning that &#8211; wh=
en using the IGPs &#8211; we flood information which must be stored on ever=
y node even though the use case for it is limited to a much
 smaller subset.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">I think we can and should be smarter =
in this regard &#8211; and given the extensive work being done to enhance m=
anageability I would like to see us benefit from this.<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">The authors of draft-ietf-mpls-reside=
nce-time clearly had some thoughts in this regard &#8211; which is why they=
 proposed to use RFC 6823 (GENAPP) in IS-IS to advertise
 the information &#8211;but the proposal in the draft is flawed in this reg=
ard. If we were to head in the &#8220;application&#8221; direction I would =
propose a much more generic &#8220;application&#8221; which is capable of a=
dvertising many interface attributes. However this goes back to
 my original concern &#8211; whether we want to use IGPs to flood interface=
 attribute information unrelated to routing even if it is segregated under =
an application. Remember that RFC 6823 stipulates that a separate instance =
of the protocol (a la RFC 6822) be used
 for such cases.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Uma Chunduri [<a href=3D"mailto:=
uma.chunduri@huawei.com">mailto:uma.chunduri@huawei.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:41 AM<br>
<b>To:</b> Les Ginsberg (ginsberg); John E Drake; Acee Lindem (acee); Alexa=
nder Vainshtein; Greg Mirsky<br>
<b>Cc:</b> Abhay Roy (akr); <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org<=
/a>; <a href=3D"mailto:isis-chairs@ietf.org">
isis-chairs@ietf.org</a>; <a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.=
org</a>;
<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-m=
pls-residence-time.all@ietf.org</a>; Robert Sparks;
<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a><br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">I support=
 advertising this in IGP.</span></a><span style=3D"font-size:11.0pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&gt;This is clearly not TE informatio=
n &#8211;..<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&gt;I do not see the IGPs as the appr=
opriate mechanism to flood generic interface capabilities<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We have instances where both the abov=
e are not met and we flooded information.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><a href=3D"https://tools.ietf.org/html/rfc7883"><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">htt=
ps://tools.ietf.org/html/rfc7883</span></a><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"> (Les,
 you co-authored the same!!)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><a href=3D"https://tools.ietf.org/html/rfc7880"><spa=
n style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">htt=
ps://tools.ietf.org/html/rfc7880</span></a><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">--</span><span style=3D"font-size:11.=
0pt;font-family:&quot;Freestyle Script&quot;;color:#1F497D"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Uma C.</span><span style=3D"font-size=
:11.0pt;font-family:&quot;Brush Script MT&quot;;color:#1F497D"><o:p></o:p><=
/span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> mpls [<a href=3D"mailto:mpls-b=
ounces@ietf.org">mailto:mpls-bounces@ietf.org</a>]
<b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
<b>Sent:</b> Thursday, January 19, 2017 9:25 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com"=
>acee@cisco.com</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexand=
er.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;;
 Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail=
.com</a>&gt;<br>
<b>Cc:</b> Abhay Roy (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.c=
om</a>&gt;; <a href=3D"mailto:mpls@ietf.org">
mpls@ietf.org</a>; <a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf=
.org</a>;
<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>; <a href=3D"mailto=
:draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; Robert Sparks &lt;<a href=
=3D"mailto:rjsparks@nostrum.com">rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John &#8211;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">For me, this raises the age-old quest=
ion of when it is/is not appropriate to use IGPs for flooding information.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">This is clearly not TE information &#=
8211; you just happen to be using this in conjunction with MPLS &#8211; but=
 it is a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> John E Drake [<a href=3D"mailto:=
jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Relying on an omniscient controller i=
s a non-starter in general and in particular because the protocol by which =
it would learn each node&#8217;s RTM capabilities and
 distribute them to the other nodes is undefined.&nbsp; Further, one of the=
 ways by which an omniscient controller learns a node&#8217;s capabilities =
is by snooping the link/state database.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Acee Lindem (acee) [<a href=3D=
"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vai=
nshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky =
&lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
 Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg=
@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi John,&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">John E Drake &lt;<a href=3D"mailto:jdrake@juniper.n=
et">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@e=
citele.com">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a hr=
ef=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<a hr=
ef=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft=
-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draf=
t-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>=
&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay =
Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<=
br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We discussed all of this with you ove=
r a year ago and used your guidance in adding the indication of RTM capabil=
ity to OSPF.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I&#8217;m sorry but I focused mainly on=
 the OSPF protocol aspects then and didn&#8217;t question the use case. Thi=
s question came up in the IS-IS WG discussions.&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Gin=
sberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.c=
om</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I guess what we were trying to envision=
 the use case and whether it makes sense for all the nodes in the IGP routi=
ng domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Additionally, if it is needed in the IG=
Ps, should there also be a BGP-LS Link Attribute TLV proposed?&nbsp;</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee&nbsp;</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Alexander Vainshtein &lt;<a href=3D"mailto:Alexande=
r.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Hi all,</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">I concur with Greg: from my POV an in=
teroperable solution should not depend on an omniscient NMS client distribu=
ting information about capabilities of each node
 to each other node. </span><span style=3D"color:black"><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Regards,</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Sasha</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Office: &#43;972-39266302</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &=
#43;972-549266302</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Greg M=
irsky [<a href=3D"mailto:gregimirsky@gmail.com">mailto:gregimirsky@gmail.co=
m</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Greg &#8211;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">I am having trouble understanding your response.</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The question we are raising is whether we should ex=
tend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Saying that the IGP functionality is optional and/o=
r wouldn&#8217;t always be advertised doesn&#8217;t really answer
 the question of whether we should or should not define the IGP extensions.=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Could you respond more directly to this point?</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black">From:</span></b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black"> Greg Mirsky
 [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimi=
rsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Greg,&nbsp;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Although it is a bit late, we&#8217;ve had some discu=
ssions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Thanks,</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Acee &nbsp;</span><span style=3D"color:black"><o:p></=
o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces@ietf.org" t=
arget=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Greg Mirsky &lt=
;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gma=
il.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">thank you for the most expedient review and comments.=
 I'll make changes in Section 2 per your suggestion.</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks &lt;<=
a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.c=
om</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">The changes all look good.</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">I still think you should say something in the document abou=
t what &quot;the time of packet arrival&quot; and &quot;transmission&quot; =
means, and call out the point you made about being careful to not
 introduce apparent jitter by not making those measurements consistently. (=
The definitions you point to in your earlier mail from G.8013 don't really =
help - they just say &quot;time of packet arrival&quot;. Again, the first a=
nd last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Please look at the new first paragraph of section 2 - there=
's a mix of &quot;as case&quot; and &quot;in case&quot; that should be made=
 consistent. I suspect it would be easiest to simply say &quot;referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">RjS</span><span style=3D"color:black"><o:p></o:p></span></p=
>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</span><span s=
tyle=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Sasha Vainshtein came with elegant idea to address di=
sconnection between discussion of one-step and two-step
 modes that you've pointed out. We've moved Section 7 as sub-section into S=
ection 2 now. Attached are updated diff and the proposed new version -13.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">once again, thank you for your thorough review and th=
e most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks &lt;<a=
 href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</body>
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: "Tarek Saad (tsaad)" <tsaad@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>
Thread-Topic: MPLS Base YANG Module
Thread-Index: AQHScs0qTJTiarlCFkWDmymLFHzAAKFGqPMAgAEHPgCAAJ48gA==
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Hi Tarek,

From: "Tarek Saad (tsaad)" <tsaad@cisco.com<mailto:tsaad@cisco.com>>
Date: Tuesday, January 24, 2017 at 9:05 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, "mpls@ietf.org<mai=
lto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>
Cc: RTG YANG Design Team <rtg-dt-yang-arch@ietf.org<mailto:rtg-dt-yang-arch=
@ietf.org>>, "draft-ietf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-bas=
e-yang@ietf.org>" <draft-ietf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpl=
s-base-yang@ietf.org>>
Subject: Re: MPLS Base YANG Module

Hi Acee,

The MPLS operations we=92ve defined are:

1.      impose-and-forward

2.      pop-and-forward (e.g. PHP behavior)

3.      pop-impose-and-forward

4.      swap-and-forward

5.      pop-and-lookup

So, given that this is an augmentation to the IPv4 Unicast RIB and there is=
 no prior label stack, how would any operation other than #1 be valid?


Currently nhlfe-role is defining the path-role: primary, pure-backup, prima=
ry-and-backup.
This may equally apply to IP-RIBs (e.g. to cover IP-FRR) too, so we can rem=
ove it from mpls augmentation if it can be present in draft-acee-rtgwg-yang=
-rib-extend-00 (for example).

Ok =96 we can discuss.

Thanks,
Acee




Regards,
Tarek

From: "Acee Lindem (acee)" <acee@cisco.com<mailto:acee@cisco.com>>
Date: Monday, January 23, 2017 at 5:23 PM
To: Tarek Saad <tsaad@cisco.com<mailto:tsaad@cisco.com>>, "mpls@ietf.org<ma=
ilto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>
Cc: RTG YANG Design Team <rtg-dt-yang-arch@ietf.org<mailto:rtg-dt-yang-arch=
@ietf.org>>, "draft-ietf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-bas=
e-yang@ietf.org>" <draft-ietf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpl=
s-base-yang@ietf.org>>
Subject: Re: MPLS Base YANG Module

Hi Tarek,

Since these are augmentations to the IPv4 and IPv6 unicast RIBs, what opera=
tion would be valid other than imposition (i.e., push)? Also, what is the n=
hlfe-role? I see the role type defined in the expired base MPLS model.

Thanks,
Acee

From: "Tarek Saad (tsaad)" <tsaad@cisco.com<mailto:tsaad@cisco.com>>
Date: Thursday, January 19, 2017 at 9:27 PM
To: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>
Cc: RTG YANG Design Team <rtg-dt-yang-arch@ietf.org<mailto:rtg-dt-yang-arch=
@ietf.org>>, "draft-ietf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-bas=
e-yang@ietf.org>" <draft-ietf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpl=
s-base-yang@ietf.org>>, Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>
Subject: MPLS Base YANG Module

Hi WG/all,

As part of =93draft-ietf-mpls-base-yang=94, we are trying to model the MPLS=
 FTN, NHLFE and ILM tables in YANG.
One proposal is to augment the IETF routing RIB model (rfc8022) for V4 and =
V6 RIBs so IP prefix route also carries the additional MPLS route local lab=
el and remote label bindings per next-hop.
Below highlights the augmentation of the RIB model for V4/V6. For MPLS cros=
s-connects (non-IP mpls routes), we propose those to reside under a new add=
ress-family (MPLS) RIB, by defining a new identity as below.
Let us know if you have feedback/comments on this proposal.


Example IPv4 RIB augmention for MPLS (highlighted in yellow):

   |  +--ro ribs
   |     +--ro rib* [name]
   |        +--ro name              string
   |        +--ro address-family    identityref
   |        +--ro default-rib?      boolean {multiple-ribs}?
   |        +--ro routes
   |        |  +--ro route*
   |        |     +--ro route-preference?          route-preference
   |        |     +--ro next-hop
   |        |     |  +--ro (next-hop-options)
   |        |     |     +--:(simple-next-hop)
   |        |     |     |  +--ro outgoing-interface?      if:interface-stat=
e-ref
   |        |     |     |  +--ro v4ur:next-hop-address?   inet:ipv4-address
   |        |     |     |  +--ro mpls:remote-labels*    mpls-label
   |        |     |     |  +--ro mpls:operation?          label-operation
   |        |     |     +--:(special-next-hop)
   |        |     |     |  +--ro special-next-hop?        enumeration
   |        |     |     +--:(next-hop-list)
   |        |     |        +--ro next-hop-list
   |        |     |           +--ro next-hop*
   |        |     |              +--ro outgoing-interface?     if:interface=
-state-ref
   |        |     |              +--ro v4ur:address?           inet:ipv4-ad=
dress
   |        |     |              +--ro mpls:index?             string
   |        |     |              +--ro mpls:backup-index?      string
   |        |     |              +--ro mpls:role?              nhlfe-role
   |        |     |              +--ro mpls:outgoing-labels*   mpls-label
   |        |     |              +--ro mpls:operation?         label-operat=
ion
   |        |     +--ro source-protocol            identityref
   |        |     +--ro active?                    empty
   |        |     +--ro last-updated?              yang:date-and-time
   |        |     +--ro v4ur:destination-prefix?   inet:ipv4-prefix
   |        |     +--ro mpls:local-label?       mpls-label


For MPLS cross-connects (non-IP mpls routes), we propose to reside under a =
new address-family (MPLS) RIB, by defining a new identity as below:

  identity mpls {
    base rt:address-family;
    description
      "This identity represents the MPLS address family.";
  }

Regards,
Tarek

From: "Acee Lindem (acee)" <acee@cisco.com<mailto:acee@cisco.com>>
Date: Friday, January 6, 2017 at 12:33 PM
To: Tarek Saad <tsaad@cisco.com<mailto:tsaad@cisco.com>>, "draft-ietf-mpls-=
base-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ietf.org>" <draft-ietf-=
mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ietf.org>>
Cc: RTG YANG Design Team <rtg-dt-yang-arch@ietf.org<mailto:rtg-dt-yang-arch=
@ietf.org>>, Loa Andersson <loa@pi.nu<mailto:loa@pi.nu>>, "xufeng.liu.ietf@=
gmail.com<mailto:xufeng.liu.ietf@gmail.com>" <xufeng.liu.ietf@gmail.com<mai=
lto:xufeng.liu.ietf@gmail.com>>
Subject: Re: [Rtg-dt-yang-arch] MPLS Base YANG Module



From: "Tarek Saad (tsaad)" <tsaad@cisco.com<mailto:tsaad@cisco.com>>
Date: Friday, January 6, 2017 at 12:00 PM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, "draft-ietf-mpls-b=
ase-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ietf.org>" <draft-ietf-m=
pls-base-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ietf.org>>
Cc: RTG YANG Design Team <rtg-dt-yang-arch@ietf.org<mailto:rtg-dt-yang-arch=
@ietf.org>>, Loa Andersson <loa@pi.nu<mailto:loa@pi.nu>>, "xufeng.liu.ietf@=
gmail.com<mailto:xufeng.liu.ietf@gmail.com>" <xufeng.liu.ietf@gmail.com<mai=
lto:xufeng.liu.ietf@gmail.com>>
Subject: Re: [Rtg-dt-yang-arch] MPLS Base YANG Module

Also for completeness, the model in =93draft-ietf-i2rs-rib-data-model=94 se=
ems to present a =93single=94 list of routes that contain all the different=
 route-types (including MPLS routes).. It was mentioned that there are disc=
ussions between authors of =93draft-ietf-i2rs-rib-data-model=94 and draft-i=
etf-netmod-routing-cfg=94. Has anything emerged that can help us steer the =
MPLS augmentation?

You should align with RFC 8022 where there is a separate model per address =
family.

Thanks,
Acee




   +--rw route-list* [route-index]
      +--rw route-index                uint64
      +--rw match
      |  +--rw (route-type)?
      |     +--:(ipv4)
      |     |  +--rw ipv4
      |     |     +--rw (ip-route-match-type)?
      |     |        +--:(dest-ipv4-address)
      |     |        |  ...
      |     |        +--:(src-ipv4-address)
      |     |        |  ...
      |     |        +--:(dest-src-ipv4-address)
      |     |           ...
      |     +--:(ipv6)
      |     |  +--rw ipv6
      |     |     +--rw (ip-route-match-type)?
      |     |        +--:(dest-ipv6-address)
      |     |        |  ...
      |     |        +--:(src-ipv6-address)
      |     |        |  ...
      |     |        +--:(dest-src-ipv6-address)
      |     |           ...
      |     +--:(mpls-route)
      |     |  +--rw mpls-label              uint32
      |     +--:(mac-route)
      |     |  +--rw mac-address             uint32
      |     +--:(interface-route)
      |        +--rw interface-identifier if:interface-ref

Regards,
Tarek

From: Tarek Saad <tsaad@cisco.com<mailto:tsaad@cisco.com>>
Date: Friday, January 6, 2017 at 11:53 AM
To: "Acee Lindem (acee)" <acee@cisco.com<mailto:acee@cisco.com>>, "draft-ie=
tf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ietf.org>" <dra=
ft-ietf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ietf.org>>
Cc: RTG YANG Design Team <rtg-dt-yang-arch@ietf.org<mailto:rtg-dt-yang-arch=
@ietf.org>>, Loa Andersson <loa@pi.nu<mailto:loa@pi.nu>>, "xufeng.liu.ietf@=
gmail.com<mailto:xufeng.liu.ietf@gmail.com>" <xufeng.liu.ietf@gmail.com<mai=
lto:xufeng.liu.ietf@gmail.com>>
Subject: Re: [Rtg-dt-yang-arch] MPLS Base YANG Module

Thanks Acee for your review and comments. The authors met and we discussed =
your comments, see below for more..

>> I really only have one comment and that is that the =93config false=94 v=
ersion of interface-mpls need not be replicated in both the rt:routing and =
rt:routing-state trees.
We discussed this and have some concerns due to potential upcoming changes =
discussed at netmod group. Xufeng will follow up on this thread regarding t=
his.

>> when some of the MPLS operational state will be added? The obvious examp=
les are the ILM, FTN, and NHLFEs.
We=92ve been discussing this, and we have some initial implementation of th=
e tables under mpls @ https://github.com/ietf-mpls-yang/te/blob/master/ietf=
-mpls.yang.tree.. However, we=92re also discussing the possibility of augme=
nting RIB for MPLS routes (see below) as you pointed..

>> One view is that the ILM, FTN, and NHLFEs could be provided via an augme=
ntation to the RIB=85
It is possible to have MPLS FTN table realized as an augmentation to existi=
ng IPv4 and IPv6 RIBs models defined in =93draft-ietf-netmod-routing-cfg=94=
. However, for pure MPLS-routes (keyed by label or aka the ILM table), this=
 would require a new separate list of routes (new address family?) and a ne=
w =93MPLS=94 RIB. In section 5.1 of =93draft-ietf-netmod-routing-cfg=94, th=
e routes have mandatory =93destination-prefix=94 attribute, and one way to =
have the MPLS route list is to redefine =93destination-prefix=94 so it sign=
ifies the MPLS incoming label for MPLS routes. Any thoughts on this?

Regards,
Tarek and co-authors


From: "Acee Lindem (acee)" <acee@cisco.com<mailto:acee@cisco.com>>
Date: Friday, December 23, 2016 at 12:59 PM
To: "Acee Lindem (acee)" <acee@cisco.com<mailto:acee@cisco.com>>, "draft-ie=
tf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ietf.org>" <dra=
ft-ietf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ietf.org>>
Cc: RTG YANG Design Team <rtg-dt-yang-arch@ietf.org<mailto:rtg-dt-yang-arch=
@ietf.org>>, Loa Andersson <loa@pi.nu<mailto:loa@pi.nu>>
Subject: Re: [Rtg-dt-yang-arch] MPLS Base YANG Module
Resent-From: <alias-bounces@ietf.org<mailto:alias-bounces@ietf.org>>
Resent-To: <jescia.chenxia@huawei.com<mailto:jescia.chenxia@huawei.com>>, <=
bin_wen@cable.comcast.com<mailto:bin_wen@cable.comcast.com>>, <igor.bryskin=
@huawei.com<mailto:igor.bryskin@huawei.com>>, <vbeeram@juniper.net<mailto:v=
beeram@juniper.net>>, <xufeng.liu.ietf@gmail.com<mailto:xufeng.liu.ietf@gma=
il.com>>, <rgandhi@cisco.com<mailto:rgandhi@cisco.com>>, <skraza@cisco.com<=
mailto:skraza@cisco.com>>, Tarek Saad <tsaad@cisco.com<mailto:tsaad@cisco.c=
om>>, <raqib@brocade.com<mailto:raqib@brocade.com>>
Resent-Date: Friday, December 23, 2016 at 12:59 PM



From: Rtg-dt-yang-arch <rtg-dt-yang-arch-bounces@ietf.org<mailto:rtg-dt-yan=
g-arch-bounces@ietf.org>> on behalf of Acee Lindem <acee@cisco.com<mailto:a=
cee@cisco.com>>
Date: Friday, December 23, 2016 at 12:52 PM
To: "draft-ietf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-base-yang@ie=
tf.org>" <draft-ietf-mpls-base-yang@ietf.org<mailto:draft-ietf-mpls-base-ya=
ng@ietf.org>>
Cc: RTG YANG Design Team <rtg-dt-yang-arch@ietf.org<mailto:rtg-dt-yang-arch=
@ietf.org>>, Loa Andersson <loa@pi.nu<mailto:loa@pi.nu>>
Subject: [Rtg-dt-yang-arch] MPLS Base YANG Module

Hi Authors,

Loa asked if I would do a review of the base MPLS YANG document. I really o=
nly have one comment and that is that the =93config false=94 version of int=
erface-mpls need not be replicated in both the rt:routing and rt:routing-st=
ate trees. For consistency, I=92d recommend removing it from rt:routing.

I=92d also ask where and when some of the MPLS operational state will be ad=
ded? The obvious examples are the ILM, FTN, and NHLFEs.

One view is that the ILM, FTN, and NHLFEs could be provided via an augmenta=
tion to the RIB=85




Thanks,
Acee

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ly: Calibri, sans-serif;">
<div>Hi Tarek,&nbsp;</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
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<span style=3D"font-weight:bold">From: </span>&quot;Tarek Saad (tsaad)&quot=
; &lt;<a href=3D"mailto:tsaad@cisco.com">tsaad@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Tuesday, January 24, 2017 at =
9:05 AM<br>
<span style=3D"font-weight:bold">To: </span>Acee Lindem &lt;<a href=3D"mail=
to:acee@cisco.com">acee@cisco.com</a>&gt;, &quot;<a href=3D"mailto:mpls@iet=
f.org">mpls@ietf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ie=
tf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Cc: </span>RTG YANG Design Team &lt;<a hre=
f=3D"mailto:rtg-dt-yang-arch@ietf.org">rtg-dt-yang-arch@ietf.org</a>&gt;, &=
quot;<a href=3D"mailto:draft-ietf-mpls-base-yang@ietf.org">draft-ietf-mpls-=
base-yang@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-base-yan=
g@ietf.org">draft-ietf-mpls-base-yang@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: MPLS Base YANG Module<=
br>
</div>
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	mso-level-number-position:left;
	text-indent:-18.0pt;}
@list l1:level2
	{mso-level-number-format:bullet;
	mso-level-text:o;
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	mso-level-number-position:left;
	text-indent:-18.0pt;
	font-family:"Courier New";}
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	font-family:Wingdings;}
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	{mso-level-number-format:bullet;
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	mso-level-number-position:left;
	text-indent:-18.0pt;
	font-family:Symbol;}
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	{mso-level-number-format:bullet;
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	text-indent:-18.0pt;
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	text-indent:-18.0pt;
	font-family:Wingdings;}
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	mso-level-text:?;
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	text-indent:-18.0pt;
	font-family:Symbol;}
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	{mso-level-number-format:bullet;
	mso-level-text:o;
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	mso-level-number-position:left;
	text-indent:-18.0pt;
	font-family:"Courier New";}
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	{mso-level-number-format:bullet;
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	text-indent:-18.0pt;
	font-family:Wingdings;}
ol
	{margin-bottom:0cm;}
ul
	{margin-bottom:0cm;}
--></style>
<div bgcolor=3D"white" lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Hi Acee,<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri"><o:p>&nbsp;</o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">The MPLS operati=
ons we=92ve defined are:<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><!--[if !supportLists]--><span style=3D"font-family:Calibri"><span=
 style=3D"mso-list:Ignore">1.<span style=3D"font-style: normal; font-varian=
t-caps: normal; font-weight: normal; font-size: 7pt; line-height: normal; f=
ont-family: 'Times New Roman';">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><!--[endif]--><span style=3D"font-family:Calibri">impo=
se-and-forward<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><!--[if !supportLists]--><span style=3D"font-family:Calibri"><span=
 style=3D"mso-list:Ignore">2.<span style=3D"font-style: normal; font-varian=
t-caps: normal; font-weight: normal; font-size: 7pt; line-height: normal; f=
ont-family: 'Times New Roman';">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><!--[endif]--><span style=3D"font-family:Calibri">pop-=
and-forward (e.g. PHP behavior)<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><!--[if !supportLists]--><span style=3D"font-family:Calibri"><span=
 style=3D"mso-list:Ignore">3.<span style=3D"font-style: normal; font-varian=
t-caps: normal; font-weight: normal; font-size: 7pt; line-height: normal; f=
ont-family: 'Times New Roman';">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><!--[endif]--><span style=3D"font-family:Calibri">pop-=
impose-and-forward<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><!--[if !supportLists]--><span style=3D"font-family:Calibri"><span=
 style=3D"mso-list:Ignore">4.<span style=3D"font-style: normal; font-varian=
t-caps: normal; font-weight: normal; font-size: 7pt; line-height: normal; f=
ont-family: 'Times New Roman';">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><!--[endif]--><span style=3D"font-family:Calibri">swap=
-and-forward<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><!--[if !supportLists]--><span style=3D"font-family:Calibri"><span=
 style=3D"mso-list:Ignore">5.<span style=3D"font-style: normal; font-varian=
t-caps: normal; font-weight: normal; font-size: 7pt; line-height: normal; f=
ont-family: 'Times New Roman';">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><!--[endif]--><span style=3D"font-family:Calibri">pop-=
and-lookup</span></p>
</div>
</div>
</div>
</blockquote>
</span>
<div><br>
</div>
<div>So, given that this is an augmentation to the IPv4 Unicast RIB and the=
re is no prior label stack, how would any operation other than #1 be valid?=
&nbsp;</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div xmlns:o=3D"urn:schemas-microsoft-com:office:office" xmlns:w=3D"urn:sch=
emas-microsoft-com:office:word" xmlns:m=3D"http://schemas.microsoft.com/off=
ice/2004/12/omml" xmlns=3D"http://www.w3.org/TR/REC-html40">
<div bgcolor=3D"white" lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><span style=3D"font-family:Calibri"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri"><o:p>&nbsp;</o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Currently nhlfe-=
role is defining the path-role: primary, pure-backup, primary-and-backup.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">This may equally=
 apply to IP-RIBs (e.g. to cover IP-FRR) too, so we can remove it from mpls=
 augmentation if it can be present in draft-acee-rtgwg-yang-rib-extend-00 (=
for example).</span></p>
</div>
</div>
</div>
</blockquote>
</span>
<div><br>
</div>
<div>Ok =96 we can discuss.&nbsp;</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Acee&nbsp;</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div xmlns:o=3D"urn:schemas-microsoft-com:office:office" xmlns:w=3D"urn:sch=
emas-microsoft-com:office:word" xmlns:m=3D"http://schemas.microsoft.com/off=
ice/2004/12/omml" xmlns=3D"http://www.w3.org/TR/REC-html40">
<div bgcolor=3D"white" lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri"><o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri"><o:p>&nbsp;</o:p=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Regards,<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Tarek<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri"><o:p>&nbsp;</o:p=
></span></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-family:Calibri;color:black">F=
rom: </span>
</b><span style=3D"font-family:Calibri;color:black">&quot;Acee Lindem (acee=
)&quot; &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com</a>&gt;<br>
<b>Date: </b>Monday, January 23, 2017 at 5:23 PM<br>
<b>To: </b>Tarek Saad &lt;<a href=3D"mailto:tsaad@cisco.com">tsaad@cisco.co=
m</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&quot; &=
lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;<br>
<b>Cc: </b>RTG YANG Design Team &lt;<a href=3D"mailto:rtg-dt-yang-arch@ietf=
.org">rtg-dt-yang-arch@ietf.org</a>&gt;, &quot;<a href=3D"mailto:draft-ietf=
-mpls-base-yang@ietf.org">draft-ietf-mpls-base-yang@ietf.org</a>&quot; &lt;=
<a href=3D"mailto:draft-ietf-mpls-base-yang@ietf.org">draft-ietf-mpls-base-=
yang@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: MPLS Base YANG Module<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">Hi Tarek,&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">Since these are augmentations to the IPv4 and IPv6 u=
nicast RIBs, what operation would be valid other than imposition (i.e., pus=
h)? Also, what is the nhlfe-role? I see the role type defined in the expire=
d base MPLS model.&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks,<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">Acee&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:Calib=
ri;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:Calibri;color:black"=
>&quot;Tarek Saad (tsaad)&quot; &lt;<a href=3D"mailto:tsaad@cisco.com">tsaa=
d@cisco.com</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 9:27 PM<br>
<b>To: </b>&quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&quot; &=
lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;<br>
<b>Cc: </b>RTG YANG Design Team &lt;<a href=3D"mailto:rtg-dt-yang-arch@ietf=
.org">rtg-dt-yang-arch@ietf.org</a>&gt;, &quot;<a href=3D"mailto:draft-ietf=
-mpls-base-yang@ietf.org">draft-ietf-mpls-base-yang@ietf.org</a>&quot; &lt;=
<a href=3D"mailto:draft-ietf-mpls-base-yang@ietf.org">draft-ietf-mpls-base-=
yang@ietf.org</a>&gt;,
 Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com</a>&gt;<b=
r>
<b>Subject: </b>MPLS Base YANG Module<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-right:0cm" id=3D"MAC_OUTLOOK_ATTR=
IBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Hi WG/all,</span=
><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">As part of =93dr=
aft-ietf-mpls-base-yang=94, we are trying to model the MPLS FTN, NHLFE and =
ILM tables in YANG.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">One proposal is =
to augment the IETF routing RIB model (rfc8022) for V4 and V6 RIBs so IP pr=
efix route also carries the additional MPLS route local label and remote la=
bel bindings per next-hop.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Below highlights=
 the augmentation of the RIB model for V4/V6. For MPLS cross-connects (non-=
IP mpls routes), we propose those to reside under a new address-family (MPL=
S) RIB, by defining a new identity as
 below.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Let us know if y=
ou have feedback/comments on this proposal.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><b><u><span style=3D"font-family:Calibri">Example IP=
v4 RIB augmention for MPLS (highlighted in yellow):</span></u></b><o:p></o:=
p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp; &#43;--ro ribs</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp; &#43;--ro rib* [name]</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro name&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; string</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro address-family&nbsp;&nbs=
p;&nbsp; identityref</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro default-rib?&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; boolean {multiple-ribs}?</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro routes</span><o:p></o:p>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; &#43;--ro route*</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; &#43;--r=
o route-preference?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; r=
oute-preference</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; &#43;--r=
o next-hop</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; =
&#43;--ro (next-hop-options)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp; &#43;--:(simple-next-hop)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp; |&nbsp; &#43;--ro outgoing-interface?&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp; if:interface-state-ref</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp; |&nbsp; &#43;--ro v4ur:next-hop-address?&nbsp;&nbsp; inet=
:ipv4-address</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; <sp=
an style=3D"background:yellow;mso-highlight:yellow">
|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; | &nbsp;&nbsp;&nbsp;&nbsp;|&nbs=
p;&nbsp;&nbsp;&nbsp; |&nbsp; &#43;--ro mpls:remote-labels*&nbsp;&nbsp;&nbsp=
; mpls-label</span></span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri;background:yellow=
;mso-highlight:yellow">&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; &#43;--ro =
mpls:operation?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; label=
-operation</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp; &#43;--:(special-next-hop)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp; |&nbsp; &#43;--ro special-next-hop?&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp; enumeration</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp; &#43;--:(next-hop-list)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro next-hop-list</span><o:p></o:=
p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro next-hop*</=
span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#4=
3;--ro outgoing-interface?&nbsp;&nbsp;&nbsp;&nbsp; if:interface-state-ref</=
span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#4=
3;--ro v4ur:address?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp; inet:ipv4-address</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; <sp=
an style=3D"background:yellow;mso-highlight:yellow">
|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&#43;--ro mpls:index?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; string</span></span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri;background:yellow=
;mso-highlight:yellow">&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro mpls:backup-index? &nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;string</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri;background:yellow=
;mso-highlight:yellow">&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro mpls:role?&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; nhlfe-role</spa=
n><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri;background:yellow=
;mso-highlight:yellow">&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--ro mpls:outgoing-labels*&nbsp;&n=
bsp; mpls-label</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri;background:yellow=
;mso-highlight:yellow">&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&#43;--ro mpls:operation?&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; label-operation</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; &#43;--r=
o source-protocol&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp; identityref</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; &#43;--r=
o active?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; empty</span><o:p></o:p></p=
>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; &#43;--r=
o last-updated?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; yang:date-and-time</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; |&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; &#43;--r=
o v4ur:destination-prefix?&nbsp;&nbsp; inet:ipv4-prefix</span><o:p></o:p></=
p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp; <sp=
an style=3D"background:yellow;mso-highlight:yellow">
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp;&nbsp; &#43;=
--ro mpls:local-label?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; mpls-label</span=
></span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">For MPLS cross-c=
onnects (non-IP mpls routes), we propose to reside under a new address-fami=
ly (MPLS) RIB, by defining a new identity as below:</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp; identity =
mpls {</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp;&nbs=
p; base rt:address-family;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp;&nbs=
p; description</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp; &quot;This identity represents the MPLS address family.&quot=
;;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp; }</span><=
o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Regards,</span><=
o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Tarek</span><o:p=
></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-family:Calibri;color:black">F=
rom: </span>
</b><span style=3D"font-family:Calibri;color:black">&quot;Acee Lindem (acee=
)&quot; &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com</a>&gt;<br>
<b>Date: </b>Friday, January 6, 2017 at 12:33 PM<br>
<b>To: </b>Tarek Saad &lt;<a href=3D"mailto:tsaad@cisco.com">tsaad@cisco.co=
m</a>&gt;, &quot;<a href=3D"mailto:draft-ietf-mpls-base-yang@ietf.org">draf=
t-ietf-mpls-base-yang@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-m=
pls-base-yang@ietf.org">draft-ietf-mpls-base-yang@ietf.org</a>&gt;<br>
<b>Cc: </b>RTG YANG Design Team &lt;<a href=3D"mailto:rtg-dt-yang-arch@ietf=
.org">rtg-dt-yang-arch@ietf.org</a>&gt;, Loa Andersson &lt;<a href=3D"mailt=
o:loa@pi.nu">loa@pi.nu</a>&gt;, &quot;<a href=3D"mailto:xufeng.liu.ietf@gma=
il.com">xufeng.liu.ietf@gmail.com</a>&quot; &lt;<a href=3D"mailto:xufeng.li=
u.ietf@gmail.com">xufeng.liu.ietf@gmail.com</a>&gt;<br>
<b>Subject: </b>Re: [Rtg-dt-yang-arch] MPLS Base YANG Module</span><o:p></o=
:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:Calib=
ri;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:Calibri;color:black"=
>&quot;Tarek Saad (tsaad)&quot; &lt;<a href=3D"mailto:tsaad@cisco.com">tsaa=
d@cisco.com</a>&gt;<br>
<b>Date: </b>Friday, January 6, 2017 at 12:00 PM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, &quot;<a href=3D"mailto:draft-ietf-mpls-base-yang@ietf.org">draft=
-ietf-mpls-base-yang@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mp=
ls-base-yang@ietf.org">draft-ietf-mpls-base-yang@ietf.org</a>&gt;<br>
<b>Cc: </b>RTG YANG Design Team &lt;<a href=3D"mailto:rtg-dt-yang-arch@ietf=
.org">rtg-dt-yang-arch@ietf.org</a>&gt;, Loa Andersson &lt;<a href=3D"mailt=
o:loa@pi.nu">loa@pi.nu</a>&gt;, &quot;<a href=3D"mailto:xufeng.liu.ietf@gma=
il.com">xufeng.liu.ietf@gmail.com</a>&quot; &lt;<a href=3D"mailto:xufeng.li=
u.ietf@gmail.com">xufeng.liu.ietf@gmail.com</a>&gt;<br>
<b>Subject: </b>Re: [Rtg-dt-yang-arch] MPLS Base YANG Module</span><o:p></o=
:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Also for complet=
eness, the model in =93draft-ietf-i2rs-rib-data-model=94 seems to present a=
 =93single=94 list of routes that contain all the different route-types (in=
cluding MPLS routes).. It was mentioned that
 there are discussions between authors of =93draft-ietf-i2rs-rib-data-model=
=94 and draft-ietf-netmod-routing-cfg=94. Has anything emerged that can hel=
p us steer the MPLS augmentation?</span><o:p></o:p></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">You should align with RFC 8022 where there is a sepa=
rate model per address family.&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks,<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">Acee&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp; &#43;--rw route-list* [route-inde=
x]</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--rw route=
-index&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp; uint64</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--rw match=
</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; &#43;--=
rw (route-type)?</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; &#43;--:(ipv4)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp; &#43;--rw ipv4</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; &#43;--rw (ip-route-match-type)?</span=
><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--:(dest-ipv4-a=
ddress)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; ...</span><o=
:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--:(src-ipv4-ad=
dress)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; ...</span><o=
:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--:(dest-src-ip=
v4-address)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ..=
.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; &#43;--:(ipv6)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp; &#43;--rw ipv6</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; &#43;--rw (ip-route-match-type)?</span=
><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp; &nbsp;|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--:(dest-ipv6-a=
ddress)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; ...</span><o=
:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--:(src-ipv6-ad=
dress)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; ...</span><o=
:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--:(dest-src-ip=
v6-address)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ..=
.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<span style=3D"background:yellow;mso-highlight:yellow">|&nbsp;&nbsp;&nbsp;&=
nbsp; &#43;--:(mpls-route)</span></span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black;background:yellow;mso-highlight:yellow">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp; &#43;--rw mpls-la=
bel&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp; uint32</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; &#43;--:(mac-route)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; |&nbsp; &#43;--rw mac-address&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; uint32</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp; &#43;--:(interface-route)</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp; &#43;--rw interface-identifier if:interface-re=
f</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Regards,</span><=
o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Tarek</span><o:p=
></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-family:Calibri;color:black">F=
rom: </span>
</b><span style=3D"font-family:Calibri;color:black">Tarek Saad &lt;<a href=
=3D"mailto:tsaad@cisco.com">tsaad@cisco.com</a>&gt;<br>
<b>Date: </b>Friday, January 6, 2017 at 11:53 AM<br>
<b>To: </b>&quot;Acee Lindem (acee)&quot; &lt;<a href=3D"mailto:acee@cisco.=
com">acee@cisco.com</a>&gt;, &quot;<a href=3D"mailto:draft-ietf-mpls-base-y=
ang@ietf.org">draft-ietf-mpls-base-yang@ietf.org</a>&quot; &lt;<a href=3D"m=
ailto:draft-ietf-mpls-base-yang@ietf.org">draft-ietf-mpls-base-yang@ietf.or=
g</a>&gt;<br>
<b>Cc: </b>RTG YANG Design Team &lt;<a href=3D"mailto:rtg-dt-yang-arch@ietf=
.org">rtg-dt-yang-arch@ietf.org</a>&gt;, Loa Andersson &lt;<a href=3D"mailt=
o:loa@pi.nu">loa@pi.nu</a>&gt;, &quot;<a href=3D"mailto:xufeng.liu.ietf@gma=
il.com">xufeng.liu.ietf@gmail.com</a>&quot; &lt;<a href=3D"mailto:xufeng.li=
u.ietf@gmail.com">xufeng.liu.ietf@gmail.com</a>&gt;<br>
<b>Subject: </b>Re: [Rtg-dt-yang-arch] MPLS Base YANG Module</span><o:p></o=
:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Thanks Acee for =
your review and comments. The authors met and we discussed your comments, s=
ee below for more..</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&gt;&gt; I reall=
y only have one comment and that is that the =93config false=94 version of =
interface-mpls need not be replicated in both the rt:routing and rt:routing=
-state trees.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">We discussed thi=
s and have some concerns due to potential upcoming changes discussed at net=
mod group. Xufeng will follow up on this thread regarding this.</span><o:p>=
</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&gt;&gt; when so=
me of the MPLS operational state will be added? The obvious examples are th=
e ILM, FTN, and NHLFEs.&nbsp;
</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">We=92ve been dis=
cussing this, and we have some initial implementation of the tables under m=
pls @
<a href=3D"https://github.com/ietf-mpls-yang/te/blob/master/ietf-mpls.yang.=
tree">https://github.com/ietf-mpls-yang/te/blob/master/ietf-mpls.yang.tree<=
/a>.. However, we=92re also discussing the possibility of augmenting RIB fo=
r MPLS routes (see below) as you pointed..</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&gt;&gt; One vie=
w is that the ILM, FTN, and NHLFEs could be provided via an augmentation to=
 the RIB=85</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">It is possible t=
o have MPLS FTN table realized as an augmentation to existing IPv4 and IPv6=
 RIBs models defined in =93draft-ietf-netmod-routing-cfg=94. However, for p=
ure MPLS-routes (keyed by label or aka the
 ILM table), this would require a new separate list of routes (new address =
family?) and a new =93MPLS=94 RIB. In section 5.1 of =93draft-ietf-netmod-r=
outing-cfg=94, the routes have mandatory =93destination-prefix=94 attribute=
, and one way to have the MPLS route list is
 to redefine =93destination-prefix=94 so it signifies the MPLS incoming lab=
el for MPLS routes. Any thoughts on this?</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Regards,</span><=
o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">Tarek and co-aut=
hors</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:Calibri">&nbsp;</span><o:=
p></o:p></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-family:Calibri;color:black">F=
rom: </span>
</b><span style=3D"font-family:Calibri;color:black">&quot;Acee Lindem (acee=
)&quot; &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com</a>&gt;<br>
<b>Date: </b>Friday, December 23, 2016 at 12:59 PM<br>
<b>To: </b>&quot;Acee Lindem (acee)&quot; &lt;<a href=3D"mailto:acee@cisco.=
com">acee@cisco.com</a>&gt;, &quot;<a href=3D"mailto:draft-ietf-mpls-base-y=
ang@ietf.org">draft-ietf-mpls-base-yang@ietf.org</a>&quot; &lt;<a href=3D"m=
ailto:draft-ietf-mpls-base-yang@ietf.org">draft-ietf-mpls-base-yang@ietf.or=
g</a>&gt;<br>
<b>Cc: </b>RTG YANG Design Team &lt;<a href=3D"mailto:rtg-dt-yang-arch@ietf=
.org">rtg-dt-yang-arch@ietf.org</a>&gt;, Loa Andersson &lt;<a href=3D"mailt=
o:loa@pi.nu">loa@pi.nu</a>&gt;<br>
<b>Subject: </b>Re: [Rtg-dt-yang-arch] MPLS Base YANG Module<br>
<b>Resent-From: </b>&lt;<a href=3D"mailto:alias-bounces@ietf.org">alias-bou=
nces@ietf.org</a>&gt;<br>
<b>Resent-To: </b>&lt;<a href=3D"mailto:jescia.chenxia@huawei.com">jescia.c=
henxia@huawei.com</a>&gt;, &lt;<a href=3D"mailto:bin_wen@cable.comcast.com"=
>bin_wen@cable.comcast.com</a>&gt;, &lt;<a href=3D"mailto:igor.bryskin@huaw=
ei.com">igor.bryskin@huawei.com</a>&gt;, &lt;<a href=3D"mailto:vbeeram@juni=
per.net">vbeeram@juniper.net</a>&gt;,
 &lt;<a href=3D"mailto:xufeng.liu.ietf@gmail.com">xufeng.liu.ietf@gmail.com=
</a>&gt;, &lt;<a href=3D"mailto:rgandhi@cisco.com">rgandhi@cisco.com</a>&gt=
;, &lt;<a href=3D"mailto:skraza@cisco.com">skraza@cisco.com</a>&gt;, Tarek =
Saad &lt;<a href=3D"mailto:tsaad@cisco.com">tsaad@cisco.com</a>&gt;,
 &lt;<a href=3D"mailto:raqib@brocade.com">raqib@brocade.com</a>&gt;<br>
<b>Resent-Date: </b>Friday, December 23, 2016 at 12:59 PM</span><o:p></o:p>=
</p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:Calib=
ri;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:Calibri;color:black"=
>Rtg-dt-yang-arch &lt;<a href=3D"mailto:rtg-dt-yang-arch-bounces@ietf.org">=
rtg-dt-yang-arch-bounces@ietf.org</a>&gt; on behalf of Acee Lindem &lt;<a h=
ref=3D"mailto:acee@cisco.com">acee@cisco.com</a>&gt;<br>
<b>Date: </b>Friday, December 23, 2016 at 12:52 PM<br>
<b>To: </b>&quot;<a href=3D"mailto:draft-ietf-mpls-base-yang@ietf.org">draf=
t-ietf-mpls-base-yang@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-m=
pls-base-yang@ietf.org">draft-ietf-mpls-base-yang@ietf.org</a>&gt;<br>
<b>Cc: </b>RTG YANG Design Team &lt;<a href=3D"mailto:rtg-dt-yang-arch@ietf=
.org">rtg-dt-yang-arch@ietf.org</a>&gt;, Loa Andersson &lt;<a href=3D"mailt=
o:loa@pi.nu">loa@pi.nu</a>&gt;<br>
<b>Subject: </b>[Rtg-dt-yang-arch] MPLS Base YANG Module</span><o:p></o:p><=
/p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Calibri;=
color:black">Hi Authors,&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Calibri;=
color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Calibri;=
color:black">Loa asked if I would do a review of the base MPLS YANG documen=
t. I really only have one comment and that is that the =93config false=94 v=
ersion of interface-mpls need not be replicated
 in both the rt:routing and rt:routing-state trees. For consistency, I=92d =
recommend removing it from rt:routing.&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Calibri;=
color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Calibri;=
color:black">I=92d also ask where and when some of the MPLS operational sta=
te will be added? The obvious examples are the ILM, FTN, and NHLFEs. &nbsp;=
</span><o:p></o:p></p>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">One view is that the ILM, FTN, and NHLFEs could be p=
rovided via an augmentation to the RIB=85&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0c=
m 0cm 0cm 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Calibri;=
color:black">&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Calibri;=
color:black">Thanks,</span><o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:Calibri;=
color:black">Acee&nbsp;</span><o:p></o:p></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</blockquote>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</span>
</body>
</html>

--_000_D4AD4D7C99D10aceeciscocom_--


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From: Eric Gray <eric.gray@ericsson.com>
To: Eric Gray <eric.gray@ericsson.com>, "Acee Lindem (acee)" <acee@cisco.com>,  Stewart Bryant <stewart.bryant@gmail.com>, Uma Chunduri <uma.chunduri@huawei.com>, "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, John E Drake <jdrake@juniper.net>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] Review of draft-ietf-mpls-residence-time-12
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Date: Wed, 25 Jan 2017 00:23:07 +0000
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Cc: "mpls@ietf.org" <mpls@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "gen-art@ietf.org" <gen-art@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, "draft-ietf-mpls-residence-time.all@ietf.org" <draft-ietf-mpls-residence-time.all@ietf.org>, "Abhay Roy \(akr\)" <akr@cisco.com>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12
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Acee,

                I misspoke below.  The optimization is to include as few no=
n-RTM capable nodes as possible.

                :)
--
Eric

From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Eric Gray
Sent: Tuesday, January 24, 2017 5:36 PM
To: Acee Lindem (acee) <acee@cisco.com>; Stewart Bryant <stewart.bryant@gma=
il.com>; Uma Chunduri <uma.chunduri@huawei.com>; Les Ginsberg (ginsberg) <g=
insberg@cisco.com>; John E Drake <jdrake@juniper.net>; Alexander Vainshtein=
 <Alexander.Vainshtein@ecitele.com>; Greg Mirsky <gregimirsky@gmail.com>
Cc: mpls@ietf.org; ietf@ietf.org; gen-art@ietf.org; isis-chairs@ietf.org; d=
raft-ietf-mpls-residence-time.all@ietf.org; Abhay Roy (akr) <akr@cisco.com>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

                Each included node that does not support RTM introduces a v=
ariable delay component.

                This would introduce a potential accuracy impact in conveyi=
ng timing information across a network.

                While it is not necessary to use a path that is composed en=
tirely of RTM capable nodes and links, you can minimize this impact by incl=
uding as few such nodes as possible.  Each such node/link combination that =
can be eliminated improves the accuracy, by reducing the variable component=
.

--
Eric

From: Gen-art [mailto:gen-art-bounces@ietf.org] On Behalf Of Acee Lindem (a=
cee)
Sent: Thursday, January 19, 2017 8:47 PM
To: Stewart Bryant <stewart.bryant@gmail.com<mailto:stewart.bryant@gmail.co=
m>>; Uma Chunduri <uma.chunduri@huawei.com<mailto:uma.chunduri@huawei.com>>=
; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>; =
John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander Vai=
nshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: mpls@ietf.org<mailto:mpls@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org=
>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; gen-art@ietf.org<mail=
to:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:dr=
aft-ietf-mpls-residence-time.all@ietf.org>; Abhay Roy (akr) <akr@cisco.com<=
mailto:akr@cisco.com>>
Subject: Re: [Gen-art] [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Stewart,

So you are saying in this use case some element would create a path compose=
d solely of nodes supporting RTM?

Thanks,
Acee

From: Stewart Bryant <stewart.bryant@gmail.com<mailto:stewart.bryant@gmail.=
com>>
Date: Thursday, January 19, 2017 at 5:04 PM
To: Uma Chunduri <uma.chunduri@huawei.com<mailto:uma.chunduri@huawei.com>>,=
 "Les Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>,=
 John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>, Acee Lindem =
<acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshtein <Alexander.Va=
inshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.com>>, Greg Mirsky=
 <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc: "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>, "mpls@ietf.org=
<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "isis-chairs=
@ietf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-c=
hairs@ietf.org>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf=
.org<mailto:gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.or=
g<mailto:draft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-res=
idence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org=
>>, Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "iet=
f@ietf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12


Well one scenario is that you would use SR to create the synchronization pa=
th, in which case you would need it to be in the IGP and flooded.

Stewart

On 19/01/2017 19:40, Uma Chunduri wrote:
I support advertising this in IGP.


>This is clearly not TE information -..
>I do not see the IGPs as the appropriate mechanism to flood generic interf=
ace capabilities

We have instances where both the above are not met and we flooded informati=
on.
https://tools.ietf.org/html/rfc7883 (Les, you co-authored the same!!)
https://tools.ietf.org/html/rfc7880

--
Uma C.

From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Les Ginsberg (ginsbe=
rg)
Sent: Thursday, January 19, 2017 9:25 AM
To: John E Drake <jdrake@juniper.net><mailto:jdrake@juniper.net>; Acee Lind=
em (acee) <acee@cisco.com><mailto:acee@cisco.com>; Alexander Vainshtein <Al=
exander.Vainshtein@ecitele.com><mailto:Alexander.Vainshtein@ecitele.com>; G=
reg Mirsky <gregimirsky@gmail.com><mailto:gregimirsky@gmail.com>
Cc: Abhay Roy (akr) <akr@cisco.com><mailto:akr@cisco.com>; mpls@ietf.org<ma=
ilto:mpls@ietf.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; gen=
-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@=
ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>; Robert Sparks=
 <rjsparks@nostrum.com><mailto:rjsparks@nostrum.com>; ietf@ietf.org<mailto:=
ietf@ietf.org>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

John -

For me, this raises the age-old question of when it is/is not appropriate t=
o use IGPs for flooding information.

This is clearly not TE information - you just happen to be using this in co=
njunction with MPLS - but it is a generic capability. I do not see the IGPs=
 as the appropriate mechanism to flood generic interface capabilities. It a=
lso, as Acee has pointed out, results in flooding information to all nodes =
in the domain when only a few care about it.

   Les

From: John E Drake [mailto:jdrake@juniper.net]
Sent: Thursday, January 19, 2017 8:54 AM
To: Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsberg (gi=
nsberg)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr)
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

Relying on an omniscient controller is a non-starter in general and in part=
icular because the protocol by which it would learn each node's RTM capabil=
ities and distribute them to the other nodes is undefined.  Further, one of=
 the ways by which an omniscient controller learns a node's capabilities is=
 by snooping the link/state database.

Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:47 AM
To: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>; Alexander=
 Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@e=
citele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.c=
om>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com=
>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi John,

From: John E Drake <jdrake@juniper.net<mailto:jdrake@juniper.net>>
Date: Thursday, January 19, 2017 at 10:43 AM
To: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Alexander Vainshte=
in <Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecitele.co=
m>>, Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Le=
s Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpl=
s@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "g=
en-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@=
ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-=
mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf=
.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<m=
ailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@i=
etf.org<mailto:isis-chairs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-cha=
irs@ietf.org>>, "Abhay Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Acee,

We discussed all of this with you over a year ago and used your guidance in=
 adding the indication of RTM capability to OSPF.

I'm sorry but I focused mainly on the OSPF protocol aspects then and didn't=
 question the use case. This question came up in the IS-IS WG discussions.

Thanks,
Acee


Yours Irrespectively,

John

From: Acee Lindem (acee) [mailto:acee@cisco.com]
Sent: Thursday, January 19, 2017 11:38 AM
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexander=
.Vainshtein@ecitele.com>>; Greg Mirsky <gregimirsky@gmail.com<mailto:gregim=
irsky@gmail.com>>; Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsb=
erg@cisco.com>>
Cc: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls=
@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>;=
 draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residen=
ce-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@iet=
f.org<mailto:isis-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:a=
kr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

I guess what we were trying to envision the use case and whether it makes s=
ense for all the nodes in the IGP routing domain to have this information. =
Would the LSP ingress LSR only need to if the egress LSR supports RTM and i=
t is best effort recording for transit LSRs in the path?

Additionally, if it is needed in the IGPs, should there also be a BGP-LS Li=
nk Attribute TLV proposed?

Thanks,
Acee

From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com<mailto:Alexand=
er.Vainshtein@ecitele.com>>
Date: Thursday, January 19, 2017 at 10:15 AM
To: Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>, "Les=
 Ginsberg (ginsberg)" <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem <acee@cisco.com<mailto:acee@cisco.com>>, Robert Sparks <rjs=
parks@nostrum.com<mailto:rjsparks@nostrum.com>>, "mpls@ietf.org<mailto:mpls=
@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.org>>, "gen-art@ietf.org<mailto=
:gen-art@ietf.org>" <gen-art@ietf.org<mailto:gen-art@ietf.org>>, "draft-iet=
f-mpls-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.al=
l@ietf.org>" <draft-ietf-mpls-residence-time.all@ietf.org<mailto:draft-ietf=
-mpls-residence-time.all@ietf.org>>, "ietf@ietf.org<mailto:ietf@ietf.org>" =
<ietf@ietf.org<mailto:ietf@ietf.org>>, "isis-chairs@ietf.org<mailto:isis-ch=
airs@ietf.org>" <isis-chairs@ietf.org<mailto:isis-chairs@ietf.org>>, "Abhay=
 Roy (akr)" <akr@cisco.com<mailto:akr@cisco.com>>
Subject: RE: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi all,
I concur with Greg: from my POV an interoperable solution should not depend=
 on an omniscient NMS client distributing information about capabilities of=
 each node to each other node.


Regards,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   Alexander.Vainshtein@ecitele.com<mailto:Alexander.Vainshtein@ecite=
le.com>

From: Greg Mirsky [mailto:gregimirsky@gmail.com]
Sent: Thursday, January 19, 2017 6:01 PM
To: Les Ginsberg (ginsberg) <ginsberg@cisco.com<mailto:ginsberg@cisco.com>>
Cc: Acee Lindem (acee) <acee@cisco.com<mailto:acee@cisco.com>>; Robert Spar=
ks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>; mpls@ietf.org<mailt=
o:mpls@ietf.org>; gen-art@ietf.org<mailto:gen-art@ietf.org>; draft-ietf-mpl=
s-residence-time.all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@iet=
f.org>; ietf@ietf.org<mailto:ietf@ietf.org>; isis-chairs@ietf.org<mailto:is=
is-chairs@ietf.org>; Abhay Roy (akr) <akr@cisco.com<mailto:akr@cisco.com>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Les,
I believe that IGP extensions to advertise RTM capability are required.

Regards,
Greg

On Thu, Jan 19, 2017 at 7:57 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m<mailto:ginsberg@cisco.com>> wrote:
Greg -

I am having trouble understanding your response.
The question we are raising is whether we should extend the IGPs to support=
 advertising RTM capability - an alternative being to retrieve the capabili=
ty via network management.

Saying that the IGP functionality is optional and/or wouldn't always be adv=
ertised doesn't really answer the question of whether we should or should n=
ot define the IGP extensions.

Could you respond more directly to this point?

   Les


From: Greg Mirsky [mailto:gregimirsky@gmail.com<mailto:gregimirsky@gmail.co=
m>]
Sent: Thursday, January 19, 2017 7:44 AM
To: Acee Lindem (acee)
Cc: Robert Sparks; mpls@ietf.org<mailto:mpls@ietf.org>; gen-art@ietf.org<ma=
ilto:gen-art@ietf.org>; draft-ietf-mpls-residence-time.all@ietf.org<mailto:=
draft-ietf-mpls-residence-time.all@ietf.org>; ietf@ietf.org<mailto:ietf@iet=
f.org>; Les Ginsberg (ginsberg); isis-chairs@ietf.org<mailto:isis-chairs@ie=
tf.org>; Abhay Roy (akr)

Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Acee,
the draft defines optional functionality. If an operator has no use neither=
 for PTP's Transparent Clock, nor RTM itself as performance metric, then RT=
M sub-TLV would not be included and thus it would not be flooded. Of course=
, it be right to reflect RTM capability through YANG data model, thus allow=
ing SDN scenario you've described.

Regards,
Greg

On Wed, Jan 18, 2017 at 2:51 PM, Acee Lindem (acee) <acee@cisco.com<mailto:=
acee@cisco.com>> wrote:
Hi Greg,

Although it is a bit late, we've had some discussions amongst the IS-IS and=
 OSPF chairs and are wondering whether the interface capability belongs in =
the IGPs. This will be flooded throughout the entire routing domain - is it=
 really needed on every node or will it the RTM testing be initiated from a=
n omniscient NMS client that would know the capabilities of each node or ea=
sily query them using YANG?

Thanks,
Acee

From: mpls <mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org>> on behalf =
of Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Date: Wednesday, January 18, 2017 at 1:25 PM
To: Robert Sparks <rjsparks@nostrum.com<mailto:rjsparks@nostrum.com>>
Cc: "mpls@ietf.org<mailto:mpls@ietf.org>" <mpls@ietf.org<mailto:mpls@ietf.o=
rg>>, "gen-art@ietf.org<mailto:gen-art@ietf.org>" <gen-art@ietf.org<mailto:=
gen-art@ietf.org>>, "draft-ietf-mpls-residence-time.all@ietf.org<mailto:dra=
ft-ietf-mpls-residence-time.all@ietf.org>" <draft-ietf-mpls-residence-time.=
all@ietf.org<mailto:draft-ietf-mpls-residence-time.all@ietf.org>>, "ietf@ie=
tf.org<mailto:ietf@ietf.org>" <ietf@ietf.org<mailto:ietf@ietf.org>>
Subject: Re: [mpls] Review of draft-ietf-mpls-residence-time-12

Hi Robert,
thank you for the most expedient review and comments. I'll make changes in =
Section 2 per your suggestion.

Regards,
Greg

On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks <rjsparks@nostrum.com<mailt=
o:rjsparks@nostrum.com>> wrote:

The changes all look good.

I still think you should say something in the document about what "the time=
 of packet arrival" and "transmission" means, and call out the point you ma=
de about being careful to not introduce apparent jitter by not making those=
 measurements consistently. (The definitions you point to in your earlier m=
ail from G.8013 don't really help - they just say "time of packet arrival".=
 Again, the first and last bit are likely to be several nanoseconds apart s=
o I think it matters. Perhaps you're saying it doesn't matter as long as ea=
ch node is consistent (there will be error in the residence time measuremen=
t, but it will be constant at each node, so the sum of errors will be const=
ant, and the clocks will be ok?)

Please look at the new first paragraph of section 2 - there's a mix of "as =
case" and "in case" that should be made consistent. I suspect it would be e=
asiest to simply say "referred to as using a one-step clock" and "referred =
to as using a two-step clock" or similar.

RjS

On 1/18/17 12:03 PM, Greg Mirsky wrote:
Hi Robert,
Sasha Vainshtein came with elegant idea to address disconnection between di=
scussion of one-step and two-step modes that you've pointed out. We've move=
d Section 7 as sub-section into Section 2 now. Attached are updated diff an=
d the proposed new version -13.

Regards,
Greg

On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky <gregimirsky@gmail.com<mailto:=
gregimirsky@gmail.com>> wrote:
Hi Robert,
once again, thank you for your thorough review and the most detailed commen=
ts. I've prepared updated version and would greatly appreciate if you revie=
w the changes and let us know whether your comments been addressed. Attache=
d are diff and the new version.

Regards,
Greg

On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks <rjsparks@nostrum.com<mailto=
:rjsparks@nostrum.com>> wrote:
Reviewer: Robert Sparks
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-mpls-residence-time-12
Reviewer: Robert Sparks
Review Date: 2017-01-10
IETF LC End Date: 2017-01-17
IESG Telechat date: 2017-02-02

Summary: Ready (with nits) for publication as a Proposed Standard

I have two primary comments. I expect both are rooted in the authors
and working group knowing what the document means instead of seeing
what
it says or doesn't say:

1) The document is loose with its use of 'packet', and where TTLs
appear when
they are discussed. It might be helpful to rephrase the text that
speaks
of RTM packets in terms of RTM messages that are encoded as G-ACh
messages and
not refer to packets unless you mean the whole encapsulated packet
with MPLS
header, ACH, and G-ACh message.

2) Since this new mechanic speaks in terms of fractional nanoseconds,
some
discussion of what trigger-point you intend people to use for taking
the
precise time of a packet's arrival or departure seems warranted. (The
first and
last bit of the whole encapsulated packet above are going to appear at
the
physical layer many nanoseconds apart at OC192 speeds if I've done the
math
right). It may be obvious to the folks discussing this, but it's not
obvious
from the document.  If it's _not_ obvious and variation in technique
is
expected, then some discussion about issues that might arise from
different
implementation choices would be welcome.

The rest of these are editorial nits:

It would help to pull an overview description of the difference
between
one-step and two-step much earlier in the document. I suggest in the
overview
in section 2. Otherwise, the reader really has to jump forward and
read section
7 before section 3's 5th bullet makes any sense.

In section 3, "IANA will be asked" should be made active. Say "This
document
asks IANA to" and point to the IANA consideration section. Apply
similar
treatment to the other places where you talk about future IANA
actions.

There are several places where there are missing words (typically
articles or
prepositions). You're less likely to end up with misinterpretations
during the
RFC Editor phase if you provide them before the document gets that far
in the
process. The spots I found most disruptive were these (this is not
intended to
be exhaustive):

  Section 3: "set 1 according" -> "set to 1 according"
  Section 3: "the Table 19 [IEEE..." -> "Table 19 of [IEEE..."
  Section 4.2: "Detailed discussion of ... modes in Section 7."
                        -> "Detailed discussion of ... modes appears
in Section 7."
  Section 10: "most of" -> "most of all"

In Setion 3.1 at "identity of the source port", please point into the
document
that defines this identity and its representation. I suspect this is a
pointer
into a specific section in IEEE.1588.2008].









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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Acee,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; I misspoke below.&nbsp; The optimiz=
ation is to include
<b><i>as few non-RTM capable nodes as possible</i></b>.<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span><span style=3D"font-size:11.0pt;font-family:Wingdings">J</span><span=
 style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">--<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Eric<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> mpls [mailto:mpls-bounces@ietf=
.org]
<b>On Behalf Of </b>Eric Gray<br>
<b>Sent:</b> Tuesday, January 24, 2017 5:36 PM<br>
<b>To:</b> Acee Lindem (acee) &lt;acee@cisco.com&gt;; Stewart Bryant &lt;st=
ewart.bryant@gmail.com&gt;; Uma Chunduri &lt;uma.chunduri@huawei.com&gt;; L=
es Ginsberg (ginsberg) &lt;ginsberg@cisco.com&gt;; John E Drake &lt;jdrake@=
juniper.net&gt;; Alexander Vainshtein &lt;Alexander.Vainshtein@ecitele.com&=
gt;;
 Greg Mirsky &lt;gregimirsky@gmail.com&gt;<br>
<b>Cc:</b> mpls@ietf.org; ietf@ietf.org; gen-art@ietf.org; isis-chairs@ietf=
.org; draft-ietf-mpls-residence-time.all@ietf.org; Abhay Roy (akr) &lt;akr@=
cisco.com&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Acee,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Each included node that does not su=
pport RTM introduces a variable delay component.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; This would introduce a potential ac=
curacy impact in conveying timing information across a network.<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; While it is not necessary to use a =
path that is composed entirely of RTM capable nodes and links, you can mini=
mize this impact by including as few such nodes
 as possible. &nbsp;Each such node/link combination that can be eliminated =
improves the accuracy, by reducing the variable component.<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">--<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Eric<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Gen-art [<a href=3D"mailto:gen=
-art-bounces@ietf.org">mailto:gen-art-bounces@ietf.org</a>]
<b>On Behalf Of </b>Acee Lindem (acee)<br>
<b>Sent:</b> Thursday, January 19, 2017 8:47 PM<br>
<b>To:</b> Stewart Bryant &lt;<a href=3D"mailto:stewart.bryant@gmail.com">s=
tewart.bryant@gmail.com</a>&gt;; Uma Chunduri &lt;<a href=3D"mailto:uma.chu=
nduri@huawei.com">uma.chunduri@huawei.com</a>&gt;; Les Ginsberg (ginsberg) =
&lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;;
 John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@juniper.net<=
/a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@ec=
itele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a hre=
f=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"m=
ailto:ietf@ietf.org">
ietf@ietf.org</a>; <a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf=
.org</a>;
<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>; <a href=3D"mailto=
:draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; Abhay Roy (akr) &lt;<a hre=
f=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [Gen-art] [mpls] Review of draft-ietf-mpls-residence-ti=
me-12<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi Stewart,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">So you are saying in this use case some=
 element would create a path composed solely of nodes supporting RTM?&nbsp;=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Stewart Bryant &lt;<a href=3D"mailto:stewart.bryant=
@gmail.com">stewart.bryant@gmail.com</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 5:04 PM<br>
<b>To: </b>Uma Chunduri &lt;<a href=3D"mailto:uma.chunduri@huawei.com">uma.=
chunduri@huawei.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a hre=
f=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;, John E Drake &l=
t;<a href=3D"mailto:jdrake@juniper.net">jdrake@juniper.net</a>&gt;,
 Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com</a>&gt;, =
Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@ecitele.com=
">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a href=3D"mail=
to:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;<br>
<b>Cc: </b>&quot;Abhay Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com"=
>akr@cisco.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &=
lt;<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjsparks@nostrum=
.com</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot=
; &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Well one scenario is that you would use SR to create the sy=
nchronization path, in which case you would need it to be in the IGP and fl=
ooded.<o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Stewart<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">On 19/01/2017 19:40, Uma Chunduri wrote=
:<o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">I support=
 advertising this in IGP.</span></a><span style=3D"color:black"><o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&gt;This is clearly not TE informatio=
n &#8211;..</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&gt;I do not see the IGPs as the appr=
opriate mechanism to flood generic interface capabilities</span><span style=
=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We have instances where both the abov=
e are not met and we flooded information.</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black"><a href=3D"https://tools=
.ietf.org/html/rfc7883"><span style=3D"font-size:11.0pt;font-family:&quot;C=
alibri&quot;,sans-serif">https://tools.ietf.org/html/rfc7883</span></a></sp=
an><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:#1F497D">
 (Les, you co-authored the same!!)</span><span style=3D"color:black"><o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black"><a href=3D"https://tools=
.ietf.org/html/rfc7880"><span style=3D"font-size:11.0pt;font-family:&quot;C=
alibri&quot;,sans-serif">https://tools.ietf.org/html/rfc7880</span></a><o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">--</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Uma C.</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> mpls [=
<a href=3D"mailto:mpls-bounces@ietf.org">mailto:mpls-bounces@ietf.org</a>]
<b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
<b>Sent:</b> Thursday, January 19, 2017 9:25 AM<br>
<b>To:</b> John E Drake <a href=3D"mailto:jdrake@juniper.net">&lt;jdrake@ju=
niper.net&gt;</a>; Acee Lindem (acee)
<a href=3D"mailto:acee@cisco.com">&lt;acee@cisco.com&gt;</a>; Alexander Vai=
nshtein <a href=3D"mailto:Alexander.Vainshtein@ecitele.com">
&lt;Alexander.Vainshtein@ecitele.com&gt;</a>; Greg Mirsky <a href=3D"mailto=
:gregimirsky@gmail.com">
&lt;gregimirsky@gmail.com&gt;</a><br>
<b>Cc:</b> Abhay Roy (akr) <a href=3D"mailto:akr@cisco.com">&lt;akr@cisco.c=
om&gt;</a>; <a href=3D"mailto:mpls@ietf.org">
mpls@ietf.org</a>; <a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf=
.org</a>;
<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>; <a href=3D"mailto=
:draft-ietf-mpls-residence-time.all@ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; Robert Sparks <a href=3D"m=
ailto:rjsparks@nostrum.com">
&lt;rjsparks@nostrum.com&gt;</a>; <a href=3D"mailto:ietf@ietf.org">ietf@iet=
f.org</a><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John &#8211;</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">For me, this raises the age-old quest=
ion of when it is/is not appropriate to use IGPs for flooding information.<=
/span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">This is clearly not TE information &#=
8211; you just happen to be using this in conjunction with MPLS &#8211; but=
 it is a generic capability. I do not see the IGPs as the
 appropriate mechanism to flood generic interface capabilities. It also, as=
 Acee has pointed out, results in flooding information to all nodes in the =
domain when only a few care about it.</span><span style=3D"color:black"><o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D=
"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black"> John E D=
rake [<a href=3D"mailto:jdrake@juniper.net">mailto:jdrake@juniper.net</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 8:54 AM<br>
<b>To:</b> Acee Lindem (acee); Alexander Vainshtein; Greg Mirsky; Les Ginsb=
erg (ginsberg)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a=
>; <a href=3D"mailto:gen-art@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr)<br>
<b>Subject:</b> RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Relying on an omniscient controller i=
s a non-starter in general and in particular because the protocol by which =
it would learn each node&#8217;s RTM capabilities and
 distribute them to the other nodes is undefined.&nbsp; Further, one of the=
 ways by which an omniscient controller learns a node&#8217;s capabilities =
is by snooping the link/state database.</span><span style=3D"color:black"><=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:47 AM<br>
<b>To:</b> John E Drake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@ju=
niper.net</a>&gt;; Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vai=
nshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky =
&lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;;
 Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg=
@cisco.com</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Hi John,&nbsp;</span><span style=3D"col=
or:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">John E Drake &lt;<a href=3D"mailto:jdrake@juniper.n=
et">jdrake@juniper.net</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:43 AM<br>
<b>To: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@e=
citele.com">Alexander.Vainshtein@ecitele.com</a>&gt;, Greg Mirsky &lt;<a hr=
ef=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;,
 &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"mailto:ginsberg@cisco.c=
om">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.or=
g</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;, &qu=
ot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<a hr=
ef=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft=
-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draf=
t-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-residence-time.all=
@ietf.org</a>&gt;, &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>=
&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay =
Roy (akr)&quot; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<=
br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Acee,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">We discussed all of this with you ove=
r a year ago and used your guidance in adding the indication of RTM capabil=
ity to OSPF.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I&#8217;m sorry but I focused mainly on=
 the OSPF protocol aspects then and didn&#8217;t question the use case. Thi=
s question came up in the IS-IS WG discussions.&nbsp;</span><span style=3D"=
color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee</span><span style=3D"color:black">=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yours Irrespectively,</span><span sty=
le=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">John</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Acee L=
indem (acee) [<a href=3D"mailto:acee@cisco.com">mailto:acee@cisco.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 11:38 AM<br>
<b>To:</b> Alexander Vainshtein &lt;<a href=3D"mailto:Alexander.Vainshtein@=
ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;; Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;; Les Gin=
sberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.c=
om</a>&gt;<br>
<b>Cc:</b> Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspar=
ks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I guess what we were trying to envision=
 the use case and whether it makes sense for all the nodes in the IGP routi=
ng domain to have this information. Would the
 LSP ingress LSR only need to if the egress LSR supports RTM and it is best=
 effort recording for transit LSRs in the path? &nbsp;</span><span style=3D=
"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Additionally, if it is needed in the IG=
Ps, should there also be a BGP-LS Link Attribute TLV proposed?&nbsp;</span>=
<span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Thanks,</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">Acee&nbsp;</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">Alexander Vainshtein &lt;<a href=3D"mailto:Alexande=
r.Vainshtein@ecitele.com">Alexander.Vainshtein@ecitele.com</a>&gt;<br>
<b>Date: </b>Thursday, January 19, 2017 at 10:15 AM<br>
<b>To: </b>Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimi=
rsky@gmail.com</a>&gt;, &quot;Les Ginsberg (ginsberg)&quot; &lt;<a href=3D"=
mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt;<br>
<b>Cc: </b>Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com">acee@cisco.com=
</a>&gt;, Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">rjspark=
s@nostrum.com</a>&gt;, &quot;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org=
</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&quot; &lt;<=
a href=3D"mailto:gen-art@ietf.org">gen-art@ietf.org</a>&gt;, &quot;<a href=
=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org">draft-ietf-mpls-res=
idence-time.all@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-mpls-re=
sidence-time.all@ietf.org">draft-ietf-mpls-residence-time.all@ietf.org</a>&=
gt;,
 &quot;<a href=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:ietf@ietf.org">ietf@ietf.org</a>&gt;, &quot;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&quot; &lt;<a href=3D"mailto:is=
is-chairs@ietf.org">isis-chairs@ietf.org</a>&gt;, &quot;Abhay Roy (akr)&quo=
t; &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject: </b>RE: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">&nbsp;</span><span style=3D"color:black=
"><o:p></o:p></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Hi all,</span><span style=3D"color:bl=
ack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">I concur with Greg: from my POV an in=
teroperable solution should not depend on an omniscient NMS client distribu=
ting information about capabilities of each node
 to each other node. </span><span style=3D"color:black"><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Regards,</span><span style=3D"color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Sasha</span><span style=3D"color:blac=
k"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Office: &#43;972-39266302</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Cell:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &=
#43;972-549266302</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">Email:&nbsp;&nbsp;
<a href=3D"mailto:Alexander.Vainshtein@ecitele.com">Alexander.Vainshtein@ec=
itele.com</a></span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#44546A">&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Greg M=
irsky [<a href=3D"mailto:gregimirsky@gmail.com">mailto:gregimirsky@gmail.co=
m</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 6:01 PM<br>
<b>To:</b> Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com=
">ginsberg@cisco.com</a>&gt;<br>
<b>Cc:</b> Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com">acee@ci=
sco.com</a>&gt;; Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com">=
rjsparks@nostrum.com</a>&gt;;
<a href=3D"mailto:mpls@ietf.org">mpls@ietf.org</a>; <a href=3D"mailto:gen-a=
rt@ietf.org">
gen-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time.all@=
ietf.org">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org">ietf@ietf.org</a>;
<a href=3D"mailto:isis-chairs@ietf.org">isis-chairs@ietf.org</a>; Abhay Roy=
 (akr) &lt;<a href=3D"mailto:akr@cisco.com">akr@cisco.com</a>&gt;<br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Hi Les,<o:p></o:p></span=
></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I believe that IGP exten=
sions to advertise RTM capability are required.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Greg<o:p></o:p></span></=
p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">On Thu, Jan 19, 2017 at =
7:57 AM, Les Ginsberg (ginsberg) &lt;<a href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Greg &#8211;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">I am having trouble understanding your response.</s=
pan><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The question we are raising is whether we should ex=
tend the IGPs to support advertising RTM capability
 &#8211; an alternative being to retrieve the capability via network manage=
ment.</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Saying that the IGP functionality is optional and/o=
r wouldn&#8217;t always be advertised doesn&#8217;t really answer
 the question of whether we should or should not define the IGP extensions.=
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Could you respond more directly to this point?</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp; Les</span><span style=3D"color:black">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black">From:</span></b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black"> Greg Mirsky
 [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimi=
rsky@gmail.com</a>]
<br>
<b>Sent:</b> Thursday, January 19, 2017 7:44 AM<br>
<b>To:</b> Acee Lindem (acee)<br>
<b>Cc:</b> Robert Sparks; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>;
<a href=3D"mailto:gen-art@ietf.org" target=3D"_blank">gen-art@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_=
blank">
draft-ietf-mpls-residence-time.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>; Les Ginsberg (ginsberg); <a href=3D"mailto:isis-chairs@i=
etf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; Abhay Roy (akr)</span><span style=3D"color:black"=
><o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
<b>Subject:</b> Re: [mpls] Review of draft-ietf-mpls-residence-time-12<o:p>=
</o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Hi Acee,<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">the draft defines optional functionali=
ty. If an operator has no use neither for PTP's Transparent Clock, nor RTM =
itself as performance metric, then RTM
 sub-TLV would not be included and thus it would not be flooded. Of course,=
 it be right to reflect RTM capability through YANG data model, thus allowi=
ng SDN scenario you've described.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">Greg<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">On Wed, Jan 18, 2017 at 2:51 PM, Acee =
Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank">acee@=
cisco.com</a>&gt; wrote:<o:p></o:p></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Greg,&nbsp;</span><span style=3D"color:black"><o:p=
></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Although it is a bit late, we&#8217;ve had some discu=
ssions amongst the IS-IS and OSPF chairs and are wondering
 whether the interface capability belongs in the IGPs. This will be flooded=
 throughout the entire routing domain &#8211; is it really needed on every =
node or will it the RTM testing be initiated from an omniscient NMS client =
that would know the capabilities of each
 node or easily query them using YANG?&nbsp;</span><span style=3D"color:bla=
ck"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Thanks,</span><span style=3D"color:black"><o:p></o:p>=
</span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Acee &nbsp;</span><span style=3D"color:black"><o:p></=
o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,sans-serif;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,=
sans-serif;color:black">mpls &lt;<a href=3D"mailto:mpls-bounces@ietf.org" t=
arget=3D"_blank">mpls-bounces@ietf.org</a>&gt; on behalf of Greg Mirsky &lt=
;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gma=
il.com</a>&gt;<br>
<b>Date: </b>Wednesday, January 18, 2017 at 1:25 PM<br>
<b>To: </b>Robert Sparks &lt;<a href=3D"mailto:rjsparks@nostrum.com" target=
=3D"_blank">rjsparks@nostrum.com</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ie=
tf.org</a>&quot; &lt;<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpl=
s@ietf.org</a>&gt;, &quot;<a href=3D"mailto:gen-art@ietf.org" target=3D"_bl=
ank">gen-art@ietf.org</a>&quot; &lt;<a href=3D"mailto:gen-art@ietf.org" tar=
get=3D"_blank">gen-art@ietf.org</a>&gt;,
 &quot;<a href=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" targe=
t=3D"_blank">draft-ietf-mpls-residence-time.all@ietf.org</a>&quot; &lt;<a h=
ref=3D"mailto:draft-ietf-mpls-residence-time.all@ietf.org" target=3D"_blank=
">draft-ietf-mpls-residence-time.all@ietf.org</a>&gt;, &quot;<a href=3D"mai=
lto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>&g=
t;<br>
<b>Subject: </b>Re: [mpls] Review of draft-ietf-mpls-residence-time-12</spa=
n><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0i=
n 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin=
-bottom:5.0pt" id=3D"m_3295676440435625155m_-4440083661747761180MAC_OUTLOOK=
_ATTRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">thank you for the most expedient review and comments.=
 I'll make changes in Section 2 per your suggestion.</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 10:34 AM, Robert Sparks &lt;<=
a href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.c=
om</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">The changes all look good.</span><span style=3D"color:black=
"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">I still think you should say something in the document abou=
t what &quot;the time of packet arrival&quot; and &quot;transmission&quot; =
means, and call out the point you made about being careful to not
 introduce apparent jitter by not making those measurements consistently. (=
The definitions you point to in your earlier mail from G.8013 don't really =
help - they just say &quot;time of packet arrival&quot;. Again, the first a=
nd last bit are likely to be several nanoseconds
 apart so I think it matters. Perhaps you're saying it doesn't matter as lo=
ng as each node is consistent (there will be error in the residence time me=
asurement, but it will be constant at each node, so the sum of errors will =
be constant, and the clocks will
 be ok?)</span><span style=3D"color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Please look at the new first paragraph of section 2 - there=
's a mix of &quot;as case&quot; and &quot;in case&quot; that should be made=
 consistent. I suspect it would be easiest to simply say &quot;referred
 to as using a one-step clock&quot; and &quot;referred to as using a two-st=
ep clock&quot; or similar.</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
<p><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">RjS</span><span style=3D"color:black"><o:p></o:p></span></p=
>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On 1/18/17 12:03 PM, Greg Mirsky wrote:</span><span s=
tyle=3D"color:black"><o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Sasha Vainshtein came with elegant idea to address di=
sconnection between discussion of one-step and two-step
 modes that you've pointed out. We've moved Section 7 as sub-section into S=
ection 2 now. Attached are updated diff and the proposed new version -13.</=
span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 18, 2017 at 8:13 AM, Greg Mirsky &lt;<a h=
ref=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Hi Robert,
</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">once again, thank you for your thorough review and th=
e most detailed comments. I've prepared updated
 version and would greatly appreciate if you review the changes and let us =
know whether your comments been addressed. Attached are diff and the new ve=
rsion.</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Regards,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">Greg</span><span style=3D"color:black"><o:p></o:p></s=
pan></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">On Wed, Jan 11, 2017 at 7:48 AM, Robert Sparks &lt;<a=
 href=3D"mailto:rjsparks@nostrum.com" target=3D"_blank">rjsparks@nostrum.co=
m</a>&gt;
 wrote:</span><span style=3D"color:black"><o:p></o:p></span></p>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;margin-bottom:12.0p=
t"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sans-ser=
if;color:black">Reviewer: Robert Sparks<br>
Review result: Ready with Nits<br>
<br>
I am the assigned Gen-ART reviewer for this draft. The General Area<br>
Review Team (Gen-ART) reviews all IETF documents being processed<br>
by the IESG for the IETF Chair.&nbsp; Please treat these comments just<br>
like any other last call comments.<br>
<br>
For more information, please see the FAQ at<br>
&lt;<a href=3D"https://trac.ietf.org/trac/gen/wiki/GenArtfaq" target=3D"_bl=
ank">https://trac.ietf.org/trac/gen/wiki/GenArtfaq</a>&gt;.<br>
<br>
Document: draft-ietf-mpls-residence-time-12<br>
Reviewer: Robert Sparks<br>
Review Date: 2017-01-10<br>
IETF LC End Date: 2017-01-17<br>
IESG Telechat date: 2017-02-02<br>
<br>
Summary: Ready (with nits) for publication as a Proposed Standard<br>
<br>
I have two primary comments. I expect both are rooted in the authors<br>
and working group knowing what the document means instead of seeing<br>
what<br>
it says or doesn't say:<br>
<br>
1) The document is loose with its use of 'packet', and where TTLs<br>
appear when<br>
they are discussed. It might be helpful to rephrase the text that<br>
speaks<br>
of RTM packets in terms of RTM messages that are encoded as G-ACh<br>
messages and<br>
not refer to packets unless you mean the whole encapsulated packet<br>
with MPLS<br>
header, ACH, and G-ACh message.<br>
<br>
2) Since this new mechanic speaks in terms of fractional nanoseconds,<br>
some<br>
discussion of what trigger-point you intend people to use for taking<br>
the<br>
precise time of a packet's arrival or departure seems warranted. (The<br>
first and<br>
last bit of the whole encapsulated packet above are going to appear at<br>
the<br>
physical layer many nanoseconds apart at OC192 speeds if I've done the<br>
math<br>
right). It may be obvious to the folks discussing this, but it's not<br>
obvious<br>
from the document.&nbsp; If it's _not_ obvious and variation in technique<b=
r>
is<br>
expected, then some discussion about issues that might arise from<br>
different<br>
implementation choices would be welcome.<br>
<br>
The rest of these are editorial nits:<br>
<br>
It would help to pull an overview description of the difference<br>
between<br>
one-step and two-step much earlier in the document. I suggest in the<br>
overview<br>
in section 2. Otherwise, the reader really has to jump forward and<br>
read section<br>
7 before section 3's 5th bullet makes any sense.<br>
<br>
In section 3, &quot;IANA will be asked&quot; should be made active. Say &qu=
ot;This<br>
document<br>
asks IANA to&quot; and point to the IANA consideration section. Apply<br>
similar<br>
treatment to the other places where you talk about future IANA<br>
actions.<br>
<br>
There are several places where there are missing words (typically<br>
articles or<br>
prepositions). You're less likely to end up with misinterpretations<br>
during the<br>
RFC Editor phase if you provide them before the document gets that far<br>
in the<br>
process. The spots I found most disruptive were these (this is not<br>
intended to<br>
be exhaustive):<br>
<br>
&nbsp; Section 3: &quot;set 1 according&quot; -&gt; &quot;set to 1 accordin=
g&quot;<br>
&nbsp; Section 3: &quot;the Table 19 [IEEE...&quot; -&gt; &quot;Table 19 of=
 [IEEE...&quot;<br>
&nbsp; Section 4.2: &quot;Detailed discussion of ... modes in Section 7.&qu=
ot;<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; -&gt; &quot;Detailed discussion of ... modes appears<br>
in Section 7.&quot;<br>
&nbsp; Section 10: &quot;most of&quot; -&gt; &quot;most of all&quot;<br>
<br>
In Setion 3.1 at &quot;identity of the source port&quot;, please point into=
 the<br>
document<br>
that defines this identity and its representation. I suspect this is a<br>
pointer<br>
into a specific section in IEEE.1588.2008].<br>
<br>
</span><span style=3D"color:black"><o:p></o:p></span></p>
</blockquote>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</blockquote>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
</div>
</blockquote>
</div>
</body>
</html>

--_000_48E1A67CB9CA044EADFEAB87D814BFF64A9C1A36eusaamb107erics_--


From nobody Tue Jan 24 17:34:55 2017
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To: "Tarek Saad (tsaad)" <tsaad@cisco.com>, "Acee Lindem (acee)" <acee@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>
References: <495ABB60-04F9-4ADC-95B0-4081DDA05E0D@cisco.com> <D4ABEA82.9905B%acee@cisco.com> <98BD05F7-1D12-4C44-9D2E-3C87A08578AC@cisco.com>
From: Loa Andersson <loa@pi.nu>
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Date: Wed, 25 Jan 2017 09:34:36 +0800
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Cc: RTG YANG Design Team <rtg-dt-yang-arch@ietf.org>, "draft-ietf-mpls-base-yang@ietf.org" <draft-ietf-mpls-base-yang@ietf.org>
Subject: Re: [mpls] MPLS Base YANG Module
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Tarek,

We've used push, swap and pop, since the beginning of MPLS,
what is the reason to rename "push" to "impose" now?

What is the difference between 3 and 4 below?

/Loa


On 2017-01-24 22:05, Tarek Saad (tsaad) wrote:
> Hi Acee,
>
>
>
> The MPLS operations we’ve defined are:
>
> 1.      impose-and-forward
>
> 2.      pop-and-forward (e.g. PHP behavior)
>
> 3.      pop-impose-and-forward
>
> 4.      swap-and-forward
>
> 5.      pop-and-lookup
>
>
>
> Currently nhlfe-role is defining the path-role: primary, pure-backup,
> primary-and-backup.
>
> This may equally apply to IP-RIBs (e.g. to cover IP-FRR) too, so we can
> remove it from mpls augmentation if it can be present in
> draft-acee-rtgwg-yang-rib-extend-00 (for example).
>
>
>
> Regards,
>
> Tarek
>
>
>
> *From: *"Acee Lindem (acee)" <acee@cisco.com>
> *Date: *Monday, January 23, 2017 at 5:23 PM
> *To: *Tarek Saad <tsaad@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>
> *Cc: *RTG YANG Design Team <rtg-dt-yang-arch@ietf.org>,
> "draft-ietf-mpls-base-yang@ietf.org" <draft-ietf-mpls-base-yang@ietf.org>
> *Subject: *Re: MPLS Base YANG Module
>
>
>
> Hi Tarek,
>
>
>
> Since these are augmentations to the IPv4 and IPv6 unicast RIBs, what
> operation would be valid other than imposition (i.e., push)? Also, what
> is the nhlfe-role? I see the role type defined in the expired base MPLS
> model.
>
>
>
> Thanks,
>
> Acee
>
>
>
> *From: *"Tarek Saad (tsaad)" <tsaad@cisco.com <mailto:tsaad@cisco.com>>
> *Date: *Thursday, January 19, 2017 at 9:27 PM
> *To: *"mpls@ietf.org <mailto:mpls@ietf.org>" <mpls@ietf.org
> <mailto:mpls@ietf.org>>
> *Cc: *RTG YANG Design Team <rtg-dt-yang-arch@ietf.org
> <mailto:rtg-dt-yang-arch@ietf.org>>, "draft-ietf-mpls-base-yang@ietf.org
> <mailto:draft-ietf-mpls-base-yang@ietf.org>"
> <draft-ietf-mpls-base-yang@ietf.org
> <mailto:draft-ietf-mpls-base-yang@ietf.org>>, Acee Lindem
> <acee@cisco.com <mailto:acee@cisco.com>>
> *Subject: *MPLS Base YANG Module
>
>
>
>     Hi WG/all,
>
>
>
>     As part of “draft-ietf-mpls-base-yang”, we are trying to model the
>     MPLS FTN, NHLFE and ILM tables in YANG.
>
>     One proposal is to augment the IETF routing RIB model (rfc8022) for
>     V4 and V6 RIBs so IP prefix route also carries the additional MPLS
>     route local label and remote label bindings per next-hop.
>
>     Below highlights the augmentation of the RIB model for V4/V6. For
>     MPLS cross-connects (non-IP mpls routes), we propose those to reside
>     under a new address-family (MPLS) RIB, by defining a new identity as
>     below.
>
>     Let us know if you have feedback/comments on this proposal.
>
>
>
>
>
>     *_Example IPv4 RIB augmention for MPLS (highlighted in yellow):_*
>
>
>
>        |  +--ro ribs
>
>        |     +--ro rib* [name]
>
>        |        +--ro name              string
>
>        |        +--ro address-family    identityref
>
>        |        +--ro default-rib?      boolean {multiple-ribs}?
>
>        |        +--ro routes
>
>        |        |  +--ro route*
>
>        |        |     +--ro route-preference?          route-preference
>
>        |        |     +--ro next-hop
>
>        |        |     |  +--ro (next-hop-options)
>
>        |        |     |     +--:(simple-next-hop)
>
>        |        |     |     |  +--ro outgoing-interface?
>     if:interface-state-ref
>
>        |        |     |     |  +--ro v4ur:next-hop-address?
>     inet:ipv4-address
>
>        |        |     |     |  +--ro mpls:remote-labels*    mpls-label
>
>        |        |     |     |  +--ro mpls:operation?
>     label-operation
>
>        |        |     |     +--:(special-next-hop)
>
>        |        |     |     |  +--ro special-next-hop?        enumeration
>
>        |        |     |     +--:(next-hop-list)
>
>        |        |     |        +--ro next-hop-list
>
>        |        |     |           +--ro next-hop*
>
>        |        |     |              +--ro outgoing-interface?
>     if:interface-state-ref
>
>        |        |     |              +--ro v4ur:address?
>     inet:ipv4-address
>
>        |        |     |              +--ro mpls:index?             string
>
>        |        |     |              +--ro mpls:backup-index?      string
>
>        |        |     |              +--ro mpls:role?
>     nhlfe-role
>
>        |        |     |              +--ro mpls:outgoing-labels*
>     mpls-label
>
>        |        |     |              +--ro mpls:operation?
>     label-operation
>
>        |        |     +--ro source-protocol            identityref
>
>        |        |     +--ro active?                    empty
>
>        |        |     +--ro last-updated?              yang:date-and-time
>
>        |        |     +--ro v4ur:destination-prefix?   inet:ipv4-prefix
>
>        |        |     +--ro mpls:local-label?       mpls-label
>
>
>
>
>
>     For MPLS cross-connects (non-IP mpls routes), we propose to reside
>     under a new address-family (MPLS) RIB, by defining a new identity as
>     below:
>
>
>
>       identity mpls {
>
>         base rt:address-family;
>
>         description
>
>           "This identity represents the MPLS address family.";
>
>       }
>
>
>
>     Regards,
>
>     Tarek
>
>
>
>     *From: *"Acee Lindem (acee)" <acee@cisco.com <mailto:acee@cisco.com>>
>     *Date: *Friday, January 6, 2017 at 12:33 PM
>     *To: *Tarek Saad <tsaad@cisco.com <mailto:tsaad@cisco.com>>,
>     "draft-ietf-mpls-base-yang@ietf.org
>     <mailto:draft-ietf-mpls-base-yang@ietf.org>"
>     <draft-ietf-mpls-base-yang@ietf.org
>     <mailto:draft-ietf-mpls-base-yang@ietf.org>>
>     *Cc: *RTG YANG Design Team <rtg-dt-yang-arch@ietf.org
>     <mailto:rtg-dt-yang-arch@ietf.org>>, Loa Andersson <loa@pi.nu
>     <mailto:loa@pi.nu>>, "xufeng.liu.ietf@gmail.com
>     <mailto:xufeng.liu.ietf@gmail.com>" <xufeng.liu.ietf@gmail.com
>     <mailto:xufeng.liu.ietf@gmail.com>>
>     *Subject: *Re: [Rtg-dt-yang-arch] MPLS Base YANG Module
>
>
>
>
>
>
>
>     *From: *"Tarek Saad (tsaad)" <tsaad@cisco.com <mailto:tsaad@cisco.com>>
>     *Date: *Friday, January 6, 2017 at 12:00 PM
>     *To: *Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>,
>     "draft-ietf-mpls-base-yang@ietf.org
>     <mailto:draft-ietf-mpls-base-yang@ietf.org>"
>     <draft-ietf-mpls-base-yang@ietf.org
>     <mailto:draft-ietf-mpls-base-yang@ietf.org>>
>     *Cc: *RTG YANG Design Team <rtg-dt-yang-arch@ietf.org
>     <mailto:rtg-dt-yang-arch@ietf.org>>, Loa Andersson <loa@pi.nu
>     <mailto:loa@pi.nu>>, "xufeng.liu.ietf@gmail.com
>     <mailto:xufeng.liu.ietf@gmail.com>" <xufeng.liu.ietf@gmail.com
>     <mailto:xufeng.liu.ietf@gmail.com>>
>     *Subject: *Re: [Rtg-dt-yang-arch] MPLS Base YANG Module
>
>
>
>         Also for completeness, the model in
>         “draft-ietf-i2rs-rib-data-model” seems to present a “single”
>         list of routes that contain all the different route-types
>         (including MPLS routes).. It was mentioned that there are
>         discussions between authors of “draft-ietf-i2rs-rib-data-model”
>         and draft-ietf-netmod-routing-cfg”. Has anything emerged that
>         can help us steer the MPLS augmentation?
>
>
>
>     You should align with RFC 8022 where there is a separate model per
>     address family.
>
>
>
>     Thanks,
>
>     Acee
>
>
>
>
>
>
>
>
>
>            +--rw route-list* [route-index]
>
>               +--rw route-index                uint64
>
>               +--rw match
>
>               |  +--rw (route-type)?
>
>               |     +--:(ipv4)
>
>               |     |  +--rw ipv4
>
>               |     |     +--rw (ip-route-match-type)?
>
>               |     |        +--:(dest-ipv4-address)
>
>               |     |        |  ...
>
>               |     |        +--:(src-ipv4-address)
>
>               |     |        |  ...
>
>               |     |        +--:(dest-src-ipv4-address)
>
>               |     |           ...
>
>               |     +--:(ipv6)
>
>               |     |  +--rw ipv6
>
>               |     |     +--rw (ip-route-match-type)?
>
>               |     |        +--:(dest-ipv6-address)
>
>               |     |        |  ...
>
>               |     |        +--:(src-ipv6-address)
>
>               |     |        |  ...
>
>               |     |        +--:(dest-src-ipv6-address)
>
>               |     |           ...
>
>               |     +--:(mpls-route)
>
>               |     |  +--rw mpls-label              uint32
>
>               |     +--:(mac-route)
>
>               |     |  +--rw mac-address             uint32
>
>               |     +--:(interface-route)
>
>               |        +--rw interface-identifier if:interface-ref
>
>
>
>         Regards,
>
>         Tarek
>
>
>
>         *From: *Tarek Saad <tsaad@cisco.com <mailto:tsaad@cisco.com>>
>         *Date: *Friday, January 6, 2017 at 11:53 AM
>         *To: *"Acee Lindem (acee)" <acee@cisco.com
>         <mailto:acee@cisco.com>>, "draft-ietf-mpls-base-yang@ietf.org
>         <mailto:draft-ietf-mpls-base-yang@ietf.org>"
>         <draft-ietf-mpls-base-yang@ietf.org
>         <mailto:draft-ietf-mpls-base-yang@ietf.org>>
>         *Cc: *RTG YANG Design Team <rtg-dt-yang-arch@ietf.org
>         <mailto:rtg-dt-yang-arch@ietf.org>>, Loa Andersson <loa@pi.nu
>         <mailto:loa@pi.nu>>, "xufeng.liu.ietf@gmail.com
>         <mailto:xufeng.liu.ietf@gmail.com>" <xufeng.liu.ietf@gmail.com
>         <mailto:xufeng.liu.ietf@gmail.com>>
>         *Subject: *Re: [Rtg-dt-yang-arch] MPLS Base YANG Module
>
>
>
>         Thanks Acee for your review and comments. The authors met and we
>         discussed your comments, see below for more..
>
>
>
>         >> I really only have one comment and that is that the “config false” version of interface-mpls need not be replicated in both the rt:routing and rt:routing-state trees.
>
>         We discussed this and have some concerns due to potential
>         upcoming changes discussed at netmod group. Xufeng will follow
>         up on this thread regarding this.
>
>
>
>         >> when some of the MPLS operational state will be added? The obvious examples are the ILM, FTN, and NHLFEs.
>
>         We’ve been discussing this, and we have some initial
>         implementation of the tables under mpls @
>         https://github.com/ietf-mpls-yang/te/blob/master/ietf-mpls.yang.tree..
>         However, we’re also discussing the possibility of augmenting RIB
>         for MPLS routes (see below) as you pointed..
>
>
>
>         >> One view is that the ILM, FTN, and NHLFEs could be provided via an augmentation to the RIB…
>
>         It is possible to have MPLS FTN table realized as an
>         augmentation to existing IPv4 and IPv6 RIBs models defined in
>         “draft-ietf-netmod-routing-cfg”. However, for pure MPLS-routes
>         (keyed by label or aka the ILM table), this would require a new
>         separate list of routes (new address family?) and a new “MPLS”
>         RIB. In section 5.1 of “draft-ietf-netmod-routing-cfg”, the
>         routes have mandatory “destination-prefix” attribute, and one
>         way to have the MPLS route list is to redefine
>         “destination-prefix” so it signifies the MPLS incoming label for
>         MPLS routes. Any thoughts on this?
>
>
>
>         Regards,
>
>         Tarek and co-authors
>
>
>
>
>
>         *From: *"Acee Lindem (acee)" <acee@cisco.com
>         <mailto:acee@cisco.com>>
>         *Date: *Friday, December 23, 2016 at 12:59 PM
>         *To: *"Acee Lindem (acee)" <acee@cisco.com
>         <mailto:acee@cisco.com>>, "draft-ietf-mpls-base-yang@ietf.org
>         <mailto:draft-ietf-mpls-base-yang@ietf.org>"
>         <draft-ietf-mpls-base-yang@ietf.org
>         <mailto:draft-ietf-mpls-base-yang@ietf.org>>
>         *Cc: *RTG YANG Design Team <rtg-dt-yang-arch@ietf.org
>         <mailto:rtg-dt-yang-arch@ietf.org>>, Loa Andersson <loa@pi.nu
>         <mailto:loa@pi.nu>>
>         *Subject: *Re: [Rtg-dt-yang-arch] MPLS Base YANG Module
>         *Resent-From: *<alias-bounces@ietf.org
>         <mailto:alias-bounces@ietf.org>>
>         *Resent-To: *<jescia.chenxia@huawei.com
>         <mailto:jescia.chenxia@huawei.com>>, <bin_wen@cable.comcast.com
>         <mailto:bin_wen@cable.comcast.com>>, <igor.bryskin@huawei.com
>         <mailto:igor.bryskin@huawei.com>>, <vbeeram@juniper.net
>         <mailto:vbeeram@juniper.net>>, <xufeng.liu.ietf@gmail.com
>         <mailto:xufeng.liu.ietf@gmail.com>>, <rgandhi@cisco.com
>         <mailto:rgandhi@cisco.com>>, <skraza@cisco.com
>         <mailto:skraza@cisco.com>>, Tarek Saad <tsaad@cisco.com
>         <mailto:tsaad@cisco.com>>, <raqib@brocade.com
>         <mailto:raqib@brocade.com>>
>         *Resent-Date: *Friday, December 23, 2016 at 12:59 PM
>
>
>
>
>
>
>
>         *From: *Rtg-dt-yang-arch <rtg-dt-yang-arch-bounces@ietf.org
>         <mailto:rtg-dt-yang-arch-bounces@ietf.org>> on behalf of Acee
>         Lindem <acee@cisco.com <mailto:acee@cisco.com>>
>         *Date: *Friday, December 23, 2016 at 12:52 PM
>         *To: *"draft-ietf-mpls-base-yang@ietf.org
>         <mailto:draft-ietf-mpls-base-yang@ietf.org>"
>         <draft-ietf-mpls-base-yang@ietf.org
>         <mailto:draft-ietf-mpls-base-yang@ietf.org>>
>         *Cc: *RTG YANG Design Team <rtg-dt-yang-arch@ietf.org
>         <mailto:rtg-dt-yang-arch@ietf.org>>, Loa Andersson <loa@pi.nu
>         <mailto:loa@pi.nu>>
>         *Subject: *[Rtg-dt-yang-arch] MPLS Base YANG Module
>
>
>
>             Hi Authors,
>
>
>
>             Loa asked if I would do a review of the base MPLS YANG
>             document. I really only have one comment and that is that
>             the “config false” version of interface-mpls need not be
>             replicated in both the rt:routing and rt:routing-state
>             trees. For consistency, I’d recommend removing it from
>             rt:routing.
>
>
>
>             I’d also ask where and when some of the MPLS operational
>             state will be added? The obvious examples are the ILM, FTN,
>             and NHLFEs.
>
>
>
>         One view is that the ILM, FTN, and NHLFEs could be provided via
>         an augmentation to the RIB…
>
>
>
>
>
>
>
>
>
>             Thanks,
>
>             Acee
>
>
>
> _______________________________________________
> mpls mailing list
> mpls@ietf.org
> https://www.ietf.org/mailman/listinfo/mpls
>

-- 


Loa Andersson                        email: loa@mail01.huawei.com
Senior MPLS Expert                          loa@pi.nu
Huawei Technologies (consultant)     phone: +46 739 81 21 64


From nobody Thu Jan 26 21:26:29 2017
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From: "Tarek Saad (tsaad)" <tsaad@cisco.com>
To: Loa Andersson <loa@pi.nu>, "Acee Lindem (acee)" <acee@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>
Thread-Topic: [mpls] MPLS Base YANG Module
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Date: Fri, 27 Jan 2017 05:26:23 +0000
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Subject: Re: [mpls] MPLS Base YANG Module
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From nobody Fri Jan 27 03:32:42 2017
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To: "Tarek Saad (tsaad)" <tsaad@cisco.com>, "Acee Lindem (acee)" <acee@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>
References: <495ABB60-04F9-4ADC-95B0-4081DDA05E0D@cisco.com> <D4ABEA82.9905B%acee@cisco.com> <98BD05F7-1D12-4C44-9D2E-3C87A08578AC@cisco.com> <044362de-9519-1baa-adf5-46c07ef9657e@pi.nu> <77C9B336-B65B-4DA1-BF27-17FE0E9491A8@cisco.com>
From: Loa Andersson <loa@pi.nu>
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Date: Fri, 27 Jan 2017 19:32:21 +0800
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Cc: RTG YANG Design Team <rtg-dt-yang-arch@ietf.org>, "draft-ietf-mpls-base-yang@ietf.org" <draft-ietf-mpls-base-yang@ietf.org>
Subject: Re: [mpls] MPLS Base YANG Module
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Tarek,

On the â€œpop-impose-and-forwardâ€ are you saying that what happens is that 
an incoming packet with this label stack:




                                          +-------+
                                          |  Lz   |
                                          +-------+
                                          |  Ly   |
     +-------+                            +-------+
     |  La   |                            |  Lx   |
     +-------+                            +-------+
     |  Lb   |                            |  Lv   |
     +-------+                            +-------+
     |  Lc   |   leaves the LSR as        |  Lc   |
     +-------+                            +-------+
     |  PL   |                            |  PL   |
     |       |                            |       |

That is a pop (La) swap (La to Lv), push (Lx), push (Ly), push(Lx)
operation, right?

So nothing but push, pop, swap.

Why do we need to single out the pop-swap-push(times n)-forward
operation?

/Loa


On 2017-01-27 13:26, Tarek Saad (tsaad) wrote:
> Hi Loa,
>
> On 2017-01-24, 8:34 PM, "Loa Andersson" <loa@pi.nu> wrote:
>
>     Tarek,
>
>     We've used push, swap and pop, since the beginning of MPLS,
>     what is the reason to rename "push" to "impose" now?
> [TS]: â€œimposeâ€ is quite common too, but I will raise this up in our next meeting and try to converge on â€œpushâ€ instead.
>
>     What is the difference between 3 and 4 below?
> [TS]: the intention was to distinguish a case where the top label is popped and replaced with a series of labels â€œpop-impose-and-forwardâ€ vs. special case of swap the top label â€œswap-and-forwardâ€.
>
> Regards,
> Tarek
>
>     /Loa
>
>
>     On 2017-01-24 22:05, Tarek Saad (tsaad) wrote:
>     > Hi Acee,
>     >
>     >
>     >
>     > The MPLS operations weâ€™ve defined are:
>     >
>     > 1.      impose-and-forward
>     >
>     > 2.      pop-and-forward (e.g. PHP behavior)
>     >
>     > 3.      pop-impose-and-forward
>     >
>     > 4.      swap-and-forward
>     >
>     > 5.      pop-and-lookup
>     >
>     >
>     >
>     > Currently nhlfe-role is defining the path-role: primary, pure-backup,
>     > primary-and-backup.
>     >
>     > This may equally apply to IP-RIBs (e.g. to cover IP-FRR) too, so we can
>     > remove it from mpls augmentation if it can be present in
>     > draft-acee-rtgwg-yang-rib-extend-00 (for example).
>     >
>     >
>     >
>     > Regards,
>     >
>     > Tarek
>     >
>     >
>     >
>     > *From: *"Acee Lindem (acee)" <acee@cisco.com>
>     > *Date: *Monday, January 23, 2017 at 5:23 PM
>     > *To: *Tarek Saad <tsaad@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>
>     > *Cc: *RTG YANG Design Team <rtg-dt-yang-arch@ietf.org>,
>     > "draft-ietf-mpls-base-yang@ietf.org" <draft-ietf-mpls-base-yang@ietf.org>
>     > *Subject: *Re: MPLS Base YANG Module
>     >
>     >
>     >
>     > Hi Tarek,
>     >
>     >
>     >
>     > Since these are augmentations to the IPv4 and IPv6 unicast RIBs, what
>     > operation would be valid other than imposition (i.e., push)? Also, what
>     > is the nhlfe-role? I see the role type defined in the expired base MPLS
>     > model.
>     >
>     >
>     >
>     > Thanks,
>     >
>     > Acee
>     >
>     >
>     >
>     > *From: *"Tarek Saad (tsaad)" <tsaad@cisco.com <mailto:tsaad@cisco.com>>
>     > *Date: *Thursday, January 19, 2017 at 9:27 PM
>     > *To: *"mpls@ietf.org <mailto:mpls@ietf.org>" <mpls@ietf.org
>     > <mailto:mpls@ietf.org>>
>     > *Cc: *RTG YANG Design Team <rtg-dt-yang-arch@ietf.org
>     > <mailto:rtg-dt-yang-arch@ietf.org>>, "draft-ietf-mpls-base-yang@ietf.org
>     > <mailto:draft-ietf-mpls-base-yang@ietf.org>"
>     > <draft-ietf-mpls-base-yang@ietf.org
>     > <mailto:draft-ietf-mpls-base-yang@ietf.org>>, Acee Lindem
>     > <acee@cisco.com <mailto:acee@cisco.com>>
>     > *Subject: *MPLS Base YANG Module
>     >
>     >
>     >
>     >     Hi WG/all,
>     >
>     >
>     >
>     >     As part of â€œdraft-ietf-mpls-base-yangâ€, we are trying to model the
>     >     MPLS FTN, NHLFE and ILM tables in YANG.
>     >
>     >     One proposal is to augment the IETF routing RIB model (rfc8022) for
>     >     V4 and V6 RIBs so IP prefix route also carries the additional MPLS
>     >     route local label and remote label bindings per next-hop.
>     >
>     >     Below highlights the augmentation of the RIB model for V4/V6. For
>     >     MPLS cross-connects (non-IP mpls routes), we propose those to reside
>     >     under a new address-family (MPLS) RIB, by defining a new identity as
>     >     below.
>     >
>     >     Let us know if you have feedback/comments on this proposal.
>     >
>     >
>     >
>     >
>     >
>     >     *_Example IPv4 RIB augmention for MPLS (highlighted in yellow):_*
>     >
>     >
>     >
>     >        |  +--ro ribs
>     >
>     >        |     +--ro rib* [name]
>     >
>     >        |        +--ro name              string
>     >
>     >        |        +--ro address-family    identityref
>     >
>     >        |        +--ro default-rib?      boolean {multiple-ribs}?
>     >
>     >        |        +--ro routes
>     >
>     >        |        |  +--ro route*
>     >
>     >        |        |     +--ro route-preference?          route-preference
>     >
>     >        |        |     +--ro next-hop
>     >
>     >        |        |     |  +--ro (next-hop-options)
>     >
>     >        |        |     |     +--:(simple-next-hop)
>     >
>     >        |        |     |     |  +--ro outgoing-interface?
>     >     if:interface-state-ref
>     >
>     >        |        |     |     |  +--ro v4ur:next-hop-address?
>     >     inet:ipv4-address
>     >
>     >        |        |     |     |  +--ro mpls:remote-labels*    mpls-label
>     >
>     >        |        |     |     |  +--ro mpls:operation?
>     >     label-operation
>     >
>     >        |        |     |     +--:(special-next-hop)
>     >
>     >        |        |     |     |  +--ro special-next-hop?        enumeration
>     >
>     >        |        |     |     +--:(next-hop-list)
>     >
>     >        |        |     |        +--ro next-hop-list
>     >
>     >        |        |     |           +--ro next-hop*
>     >
>     >        |        |     |              +--ro outgoing-interface?
>     >     if:interface-state-ref
>     >
>     >        |        |     |              +--ro v4ur:address?
>     >     inet:ipv4-address
>     >
>     >        |        |     |              +--ro mpls:index?             string
>     >
>     >        |        |     |              +--ro mpls:backup-index?      string
>     >
>     >        |        |     |              +--ro mpls:role?
>     >     nhlfe-role
>     >
>     >        |        |     |              +--ro mpls:outgoing-labels*
>     >     mpls-label
>     >
>     >        |        |     |              +--ro mpls:operation?
>     >     label-operation
>     >
>     >        |        |     +--ro source-protocol            identityref
>     >
>     >        |        |     +--ro active?                    empty
>     >
>     >        |        |     +--ro last-updated?              yang:date-and-time
>     >
>     >        |        |     +--ro v4ur:destination-prefix?   inet:ipv4-prefix
>     >
>     >        |        |     +--ro mpls:local-label?       mpls-label
>     >
>     >
>     >
>     >
>     >
>     >     For MPLS cross-connects (non-IP mpls routes), we propose to reside
>     >     under a new address-family (MPLS) RIB, by defining a new identity as
>     >     below:
>     >
>     >
>     >
>     >       identity mpls {
>     >
>     >         base rt:address-family;
>     >
>     >         description
>     >
>     >           "This identity represents the MPLS address family.";
>     >
>     >       }
>     >
>     >
>     >
>     >     Regards,
>     >
>     >     Tarek
>     >
>     >
>     >
>     >     *From: *"Acee Lindem (acee)" <acee@cisco.com <mailto:acee@cisco.com>>
>     >     *Date: *Friday, January 6, 2017 at 12:33 PM
>     >     *To: *Tarek Saad <tsaad@cisco.com <mailto:tsaad@cisco.com>>,
>     >     "draft-ietf-mpls-base-yang@ietf.org
>     >     <mailto:draft-ietf-mpls-base-yang@ietf.org>"
>     >     <draft-ietf-mpls-base-yang@ietf.org
>     >     <mailto:draft-ietf-mpls-base-yang@ietf.org>>
>     >     *Cc: *RTG YANG Design Team <rtg-dt-yang-arch@ietf.org
>     >     <mailto:rtg-dt-yang-arch@ietf.org>>, Loa Andersson <loa@pi.nu
>     >     <mailto:loa@pi.nu>>, "xufeng.liu.ietf@gmail.com
>     >     <mailto:xufeng.liu.ietf@gmail.com>" <xufeng.liu.ietf@gmail.com
>     >     <mailto:xufeng.liu.ietf@gmail.com>>
>     >     *Subject: *Re: [Rtg-dt-yang-arch] MPLS Base YANG Module
>     >
>     >
>     >
>     >
>     >
>     >
>     >
>     >     *From: *"Tarek Saad (tsaad)" <tsaad@cisco.com <mailto:tsaad@cisco.com>>
>     >     *Date: *Friday, January 6, 2017 at 12:00 PM
>     >     *To: *Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>,
>     >     "draft-ietf-mpls-base-yang@ietf.org
>     >     <mailto:draft-ietf-mpls-base-yang@ietf.org>"
>     >     <draft-ietf-mpls-base-yang@ietf.org
>     >     <mailto:draft-ietf-mpls-base-yang@ietf.org>>
>     >     *Cc: *RTG YANG Design Team <rtg-dt-yang-arch@ietf.org
>     >     <mailto:rtg-dt-yang-arch@ietf.org>>, Loa Andersson <loa@pi.nu
>     >     <mailto:loa@pi.nu>>, "xufeng.liu.ietf@gmail.com
>     >     <mailto:xufeng.liu.ietf@gmail.com>" <xufeng.liu.ietf@gmail.com
>     >     <mailto:xufeng.liu.ietf@gmail.com>>
>     >     *Subject: *Re: [Rtg-dt-yang-arch] MPLS Base YANG Module
>     >
>     >
>     >
>     >         Also for completeness, the model in
>     >         â€œdraft-ietf-i2rs-rib-data-modelâ€ seems to present a â€œsingleâ€
>     >         list of routes that contain all the different route-types
>     >         (including MPLS routes).. It was mentioned that there are
>     >         discussions between authors of â€œdraft-ietf-i2rs-rib-data-modelâ€
>     >         and draft-ietf-netmod-routing-cfgâ€. Has anything emerged that
>     >         can help us steer the MPLS augmentation?
>     >
>     >
>     >
>     >     You should align with RFC 8022 where there is a separate model per
>     >     address family.
>     >
>     >
>     >
>     >     Thanks,
>     >
>     >     Acee
>     >
>     >
>     >
>     >
>     >
>     >
>     >
>     >
>     >
>     >            +--rw route-list* [route-index]
>     >
>     >               +--rw route-index                uint64
>     >
>     >               +--rw match
>     >
>     >               |  +--rw (route-type)?
>     >
>     >               |     +--:(ipv4)
>     >
>     >               |     |  +--rw ipv4
>     >
>     >               |     |     +--rw (ip-route-match-type)?
>     >
>     >               |     |        +--:(dest-ipv4-address)
>     >
>     >               |     |        |  ...
>     >
>     >               |     |        +--:(src-ipv4-address)
>     >
>     >               |     |        |  ...
>     >
>     >               |     |        +--:(dest-src-ipv4-address)
>     >
>     >               |     |           ...
>     >
>     >               |     +--:(ipv6)
>     >
>     >               |     |  +--rw ipv6
>     >
>     >               |     |     +--rw (ip-route-match-type)?
>     >
>     >               |     |        +--:(dest-ipv6-address)
>     >
>     >               |     |        |  ...
>     >
>     >               |     |        +--:(src-ipv6-address)
>     >
>     >               |     |        |  ...
>     >
>     >               |     |        +--:(dest-src-ipv6-address)
>     >
>     >               |     |           ...
>     >
>     >               |     +--:(mpls-route)
>     >
>     >               |     |  +--rw mpls-label              uint32
>     >
>     >               |     +--:(mac-route)
>     >
>     >               |     |  +--rw mac-address             uint32
>     >
>     >               |     +--:(interface-route)
>     >
>     >               |        +--rw interface-identifier if:interface-ref
>     >
>     >
>     >
>     >         Regards,
>     >
>     >         Tarek
>     >
>     >
>     >
>     >         *From: *Tarek Saad <tsaad@cisco.com <mailto:tsaad@cisco.com>>
>     >         *Date: *Friday, January 6, 2017 at 11:53 AM
>     >         *To: *"Acee Lindem (acee)" <acee@cisco.com
>     >         <mailto:acee@cisco.com>>, "draft-ietf-mpls-base-yang@ietf.org
>     >         <mailto:draft-ietf-mpls-base-yang@ietf.org>"
>     >         <draft-ietf-mpls-base-yang@ietf.org
>     >         <mailto:draft-ietf-mpls-base-yang@ietf.org>>
>     >         *Cc: *RTG YANG Design Team <rtg-dt-yang-arch@ietf.org
>     >         <mailto:rtg-dt-yang-arch@ietf.org>>, Loa Andersson <loa@pi.nu
>     >         <mailto:loa@pi.nu>>, "xufeng.liu.ietf@gmail.com
>     >         <mailto:xufeng.liu.ietf@gmail.com>" <xufeng.liu.ietf@gmail.com
>     >         <mailto:xufeng.liu.ietf@gmail.com>>
>     >         *Subject: *Re: [Rtg-dt-yang-arch] MPLS Base YANG Module
>     >
>     >
>     >
>     >         Thanks Acee for your review and comments. The authors met and we
>     >         discussed your comments, see below for more..
>     >
>     >
>     >
>     >         >> I really only have one comment and that is that the â€œconfig falseâ€ version of interface-mpls need not be replicated in both the rt:routing and rt:routing-state trees.
>     >
>     >         We discussed this and have some concerns due to potential
>     >         upcoming changes discussed at netmod group. Xufeng will follow
>     >         up on this thread regarding this.
>     >
>     >
>     >
>     >         >> when some of the MPLS operational state will be added? The obvious examples are the ILM, FTN, and NHLFEs.
>     >
>     >         Weâ€™ve been discussing this, and we have some initial
>     >         implementation of the tables under mpls @
>     >         https://github.com/ietf-mpls-yang/te/blob/master/ietf-mpls.yang.tree..
>     >         However, weâ€™re also discussing the possibility of augmenting RIB
>     >         for MPLS routes (see below) as you pointed..
>     >
>     >
>     >
>     >         >> One view is that the ILM, FTN, and NHLFEs could be provided via an augmentation to the RIBâ€¦
>     >
>     >         It is possible to have MPLS FTN table realized as an
>     >         augmentation to existing IPv4 and IPv6 RIBs models defined in
>     >         â€œdraft-ietf-netmod-routing-cfgâ€. However, for pure MPLS-routes
>     >         (keyed by label or aka the ILM table), this would require a new
>     >         separate list of routes (new address family?) and a new â€œMPLSâ€
>     >         RIB. In section 5.1 of â€œdraft-ietf-netmod-routing-cfgâ€, the
>     >         routes have mandatory â€œdestination-prefixâ€ attribute, and one
>     >         way to have the MPLS route list is to redefine
>     >         â€œdestination-prefixâ€ so it signifies the MPLS incoming label for
>     >         MPLS routes. Any thoughts on this?
>     >
>     >
>     >
>     >         Regards,
>     >
>     >         Tarek and co-authors
>     >
>     >
>     >
>     >
>     >
>     >         *From: *"Acee Lindem (acee)" <acee@cisco.com
>     >         <mailto:acee@cisco.com>>
>     >         *Date: *Friday, December 23, 2016 at 12:59 PM
>     >         *To: *"Acee Lindem (acee)" <acee@cisco.com
>     >         <mailto:acee@cisco.com>>, "draft-ietf-mpls-base-yang@ietf.org
>     >         <mailto:draft-ietf-mpls-base-yang@ietf.org>"
>     >         <draft-ietf-mpls-base-yang@ietf.org
>     >         <mailto:draft-ietf-mpls-base-yang@ietf.org>>
>     >         *Cc: *RTG YANG Design Team <rtg-dt-yang-arch@ietf.org
>     >         <mailto:rtg-dt-yang-arch@ietf.org>>, Loa Andersson <loa@pi.nu
>     >         <mailto:loa@pi.nu>>
>     >         *Subject: *Re: [Rtg-dt-yang-arch] MPLS Base YANG Module
>     >         *Resent-From: *<alias-bounces@ietf.org
>     >         <mailto:alias-bounces@ietf.org>>
>     >         *Resent-To: *<jescia.chenxia@huawei.com
>     >         <mailto:jescia.chenxia@huawei.com>>, <bin_wen@cable.comcast.com
>     >         <mailto:bin_wen@cable.comcast.com>>, <igor.bryskin@huawei.com
>     >         <mailto:igor.bryskin@huawei.com>>, <vbeeram@juniper.net
>     >         <mailto:vbeeram@juniper.net>>, <xufeng.liu.ietf@gmail.com
>     >         <mailto:xufeng.liu.ietf@gmail.com>>, <rgandhi@cisco.com
>     >         <mailto:rgandhi@cisco.com>>, <skraza@cisco.com
>     >         <mailto:skraza@cisco.com>>, Tarek Saad <tsaad@cisco.com
>     >         <mailto:tsaad@cisco.com>>, <raqib@brocade.com
>     >         <mailto:raqib@brocade.com>>
>     >         *Resent-Date: *Friday, December 23, 2016 at 12:59 PM
>     >
>     >
>     >
>     >
>     >
>     >
>     >
>     >         *From: *Rtg-dt-yang-arch <rtg-dt-yang-arch-bounces@ietf.org
>     >         <mailto:rtg-dt-yang-arch-bounces@ietf.org>> on behalf of Acee
>     >         Lindem <acee@cisco.com <mailto:acee@cisco.com>>
>     >         *Date: *Friday, December 23, 2016 at 12:52 PM
>     >         *To: *"draft-ietf-mpls-base-yang@ietf.org
>     >         <mailto:draft-ietf-mpls-base-yang@ietf.org>"
>     >         <draft-ietf-mpls-base-yang@ietf.org
>     >         <mailto:draft-ietf-mpls-base-yang@ietf.org>>
>     >         *Cc: *RTG YANG Design Team <rtg-dt-yang-arch@ietf.org
>     >         <mailto:rtg-dt-yang-arch@ietf.org>>, Loa Andersson <loa@pi.nu
>     >         <mailto:loa@pi.nu>>
>     >         *Subject: *[Rtg-dt-yang-arch] MPLS Base YANG Module
>     >
>     >
>     >
>     >             Hi Authors,
>     >
>     >
>     >
>     >             Loa asked if I would do a review of the base MPLS YANG
>     >             document. I really only have one comment and that is that
>     >             the â€œconfig falseâ€ version of interface-mpls need not be
>     >             replicated in both the rt:routing and rt:routing-state
>     >             trees. For consistency, Iâ€™d recommend removing it from
>     >             rt:routing.
>     >
>     >
>     >
>     >             Iâ€™d also ask where and when some of the MPLS operational
>     >             state will be added? The obvious examples are the ILM, FTN,
>     >             and NHLFEs.
>     >
>     >
>     >
>     >         One view is that the ILM, FTN, and NHLFEs could be provided via
>     >         an augmentation to the RIBâ€¦
>     >
>     >
>     >
>     >
>     >
>     >
>     >
>     >
>     >
>     >             Thanks,
>     >
>     >             Acee
>     >
>     >
>     >
>     > _______________________________________________
>     > mpls mailing list
>     > mpls@ietf.org
>     > https://www.ietf.org/mailman/listinfo/mpls
>     >
>
>     --
>
>
>     Loa Andersson                        email: loa@mail01.huawei.com
>     Senior MPLS Expert                          loa@pi.nu
>     Huawei Technologies (consultant)     phone: +46 739 81 21 64
>
>

-- 


Loa Andersson                        email: loa@mail01.huawei.com
Senior MPLS Expert                          loa@pi.nu
Huawei Technologies (consultant)     phone: +46 739 81 21 64


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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/Ysv1O7kJhx__Pa3sZRUhMhjQZbA>
Subject: [mpls] Fwd: [spring] WG Last Call for draft-ietf-spring-segment-routing-mpls-06
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Hello,

just that you know that we're WGLCing that draft in SPRING.
Comments and opinions are welcome.

-m

-------- Message transféré --------
Sujet : [spring] WG Last Call for draft-ietf-spring-segment-routing-mpls-06
Date : Fri, 27 Jan 2017 12:05:05 +0100
De : Martin Vigoureux <martin.vigoureux@nokia.com>
Pour : spring@ietf.org
Copie à : draft-ietf-spring-segment-routing-mpls@ietf.org

Hello Working Group,

This email starts a 2-week Working Group Last Call on 
draft-ietf-spring-segment-routing-mpls-06 [1].

¤ Please read the document if you haven't read the most recent
version yet, and send your comments to the list, no later than the
*12th of February*.
Note that this is *not only* a call for comments on the document; it is 
also a call for support (or not) to publish this document as a Proposed 
Standard RFC.

¤ We have already polled for IPR knowledge on this document and all 
Authors have replied.
IPR exists against this document and has been disclosed [2].

Thank you

M&B

---
[1] https://datatracker.ietf.org/doc/draft-ietf-spring-segment-routing-mpls/
[2] 
https://datatracker.ietf.org/ipr/search/?submit=draft&id=draft-ietf-spring-segment-routing-mpls

_______________________________________________
spring mailing list
spring@ietf.org
https://www.ietf.org/mailman/listinfo/spring


From nobody Fri Jan 27 03:36:51 2017
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To: "mpls@ietf.org" <mpls@ietf.org>
From: Loa Andersson <loa@pi.nu>
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Subject: [mpls] Fwd: [spring] WG Last Call for draft-ietf-spring-segment-routing-mpls-06
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Working Group,

Please notice that the spring working group are doing a last call on
draft-ietf-spring-segment-routing-mpls.

/Loa
mpls wg co-chair


-------- Forwarded Message --------
Subject: [spring] WG Last Call for draft-ietf-spring-segment-routing-mpls-06
Date: Fri, 27 Jan 2017 12:05:05 +0100
From: Martin Vigoureux <martin.vigoureux@nokia.com>
To: spring@ietf.org
CC: draft-ietf-spring-segment-routing-mpls@ietf.org

Hello Working Group,

This email starts a 2-week Working Group Last Call on 
draft-ietf-spring-segment-routing-mpls-06 [1].

¤ Please read the document if you haven't read the most recent
version yet, and send your comments to the list, no later than the
*12th of February*.
Note that this is *not only* a call for comments on the document; it is 
also a call for support (or not) to publish this document as a Proposed 
Standard RFC.

¤ We have already polled for IPR knowledge on this document and all 
Authors have replied.
IPR exists against this document and has been disclosed [2].

Thank you

M&B

---
[1] https://datatracker.ietf.org/doc/draft-ietf-spring-segment-routing-mpls/
[2] 
https://datatracker.ietf.org/ipr/search/?submit=draft&id=draft-ietf-spring-segment-routing-mpls

_______________________________________________
spring mailing list
spring@ietf.org
https://www.ietf.org/mailman/listinfo/spring

-- 


Loa Andersson                        email: loa@mail01.huawei.com
Senior MPLS Expert                          loa@pi.nu
Huawei Technologies (consultant)     phone: +46 739 81 21 64


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To: "Stefano Previdi (sprevidi)" <sprevidi@cisco.com>, Martin Horneffer <maho@nic.dtag.de>
References: <e9839b0c-6ce4-48f0-c44d-9524c78b6c74@nokia.com> <25B4902B1192E84696414485F57268540187F20F@SJCEML703-CHM.china.huawei.com> <72705bfb-1c80-37ab-423f-27aec7378462@nic.dtag.de> <D8B1301A-330E-40D6-A2AF-A8B90B73163A@cisco.com>
From: Stewart Bryant <stewart.bryant@gmail.com>
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Date: Mon, 30 Jan 2017 11:51:02 +0000
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Subject: Re: [mpls] [spring] WG Last Call for draft-ietf-spring-segment-routing-mpls-06
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Stefano,

This is the document that someone interested in SR from and an MPLS 
perspective may well start with. A discussion on the issue of label 
stack depth and the practical constrains is thus very much in scope. The 
fact that you had a debate in the past immediately points to the need 
for a summary of the key issues and conclusions in this document.

Stewart


On 30/01/2017 11:27, Stefano Previdi (sprevidi) wrote:
> I agree with Martin,
>
> I think we have discussed this at length and I wouldn't re-spin the debate (and come to the same conclusion again and again). The manageability section of the architecture draft mention that a node may want to signal its stack capabilities and we have igp extensions for that.
>
> s.
>
>
>> On Jan 30, 2017, at 10:13 AM, Martin Horneffer <maho@nic.dtag.de> wrote:
>>
>> Hello Uma,
>>
>> what kind of label depth discussion are you thinking of?
>>
>> It seems to me this could easily become an endless discussion again. People seem to have very different views on it. Thus I'm not sure whether it would be suitable for this document.
>>
>> BTW:
>>
>> For my needs, bandwidth optimization is one of the major use cases for all traffic engineering technologies such as SR or RSVP.
>>
>> We are currently supporting scientific university research about this, and first results give strong confirmation that for bandwidth optimization in real world networks you rarely need more than 1 additional segment. Or rather, the additional efficiency gained by using mor than 1 additional segment is very small. We compare a global real backbone network with current routing, theoretical MCF optimization and realistic optimization with 1 (or 2 or 3) additional traffic engineering segments (aka 2-SR, 3-SR, 4-SR).
>> Thus, from my point of view, an SR optimized network would typically have the same label stack depth as a similarily RSVP optimized network in some places, and a smaller label stack for the overall average .
>>
>> All other use-cases I found of serious interest so far all work with 1 additional segment (i.e. label) at most.
>>
>> Best regards, Martin
>>
>>
>> Am 27.01.17 um 20:59 schrieb Uma Chunduri:
>>> Support.
>>>
>>> One quick comment:
>>>
>>> While section 3 correctly documents MPLS instantiation of SR -  given the constructs SR has (ADJ SID for example) it's good to document SID/Label depth implications in the deployments.
>>>
>>> --
>>> Uma C.
>>>
>>> -----Original Message-----
>>> From: spring [mailto:spring-bounces@ietf.org] On Behalf Of Martin Vigoureux
>>> Sent: Friday, January 27, 2017 3:05 AM
>>> To: spring@ietf.org
>>> Cc: draft-ietf-spring-segment-routing-mpls@ietf.org
>>> Subject: [spring] WG Last Call for draft-ietf-spring-segment-routing-mpls-06
>>>
>>> Hello Working Group,
>>>
>>> This email starts a 2-week Working Group Last Call on
>>> draft-ietf-spring-segment-routing-mpls-06 [1].
>>>
>>> ¤ Please read the document if you haven't read the most recent version yet, and send your comments to the list, no later than the *12th of February*.
>>> Note that this is *not only* a call for comments on the document; it is also a call for support (or not) to publish this document as a Proposed Standard RFC.
>>>
>>> ¤ We have already polled for IPR knowledge on this document and all Authors have replied.
>>> IPR exists against this document and has been disclosed [2].
>>>
>>> Thank you
>>>
>>> M&B
>>>
>>> ---
>>> [1] https://datatracker.ietf.org/doc/draft-ietf-spring-segment-routing-mpls/
>>> [2]
>>> https://datatracker.ietf.org/ipr/search/?submit=draft&id=draft-ietf-spring-segment-routing-mpls
>>>
>>> _______________________________________________
>>> spring mailing list
>>> spring@ietf.org
>>> https://www.ietf.org/mailman/listinfo/spring
>>>
>>> _______________________________________________
>>> spring mailing list
>>> spring@ietf.org
>>> https://www.ietf.org/mailman/listinfo/spring
>>>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring


From nobody Mon Jan 30 06:38:47 2017
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Subject: [mpls] I-D Action: draft-ietf-mpls-residence-time-13.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Multiprotocol Label Switching of the IETF.

        Title           : Residence Time Measurement in MPLS network
        Authors         : Greg Mirsky
                          Stefano Ruffini
                          Eric Gray
                          John Drake
                          Stewart Bryant
                          Alexander Vainshtein
	Filename        : draft-ietf-mpls-residence-time-13.txt
	Pages           : 27
	Date            : 2017-01-30

Abstract:
   This document specifies a new Generic Associated Channel for
   Residence Time Measurement and describes how it can be used by time
   synchronization protocols within a MPLS domain.

   Residence time is the variable part of propagation delay of timing
   and synchronization messages and knowing what this delay is for each
   message allows for a more accurate determination of the delay to be
   taken into account in applying the value included in a Precision Time
   Protocol event message.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-mpls-residence-time/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-mpls-residence-time-13

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-residence-time-13


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


From nobody Mon Jan 30 08:02:11 2017
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From: Loa Andersson <loa@pi.nu>
To: "mpls@ietf.org" <mpls@ietf.org>, TEAS WG <teas@ietf.org>, "ospf@ietf.org" <ospf@ietf.org>, Isis-wg <isis-wg-bounces@ietf.org>
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Subject: [mpls] Working group last call on draft-ietf-mpls-residence-time
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Working Groups,

This is to initiate a two week working group last call in four working
groups on draft-ietf-mpls-residence-time-13.

The MPLS working group has done an earlier working group last call and
a request for publication has been made.

The changes to the document were such that we decided to do a new
working group last call and extend it to MPLS, TEAS, OSPF and IS-IS.

There are three major changes between the version of the document for
which publication was requested are:

(1) that section 7 " One-step Clock and Two-step Clock Modes" has been
     moved up to become section 2.1.
(2) that a sub-TLV for TLV 22 instead of TLV 251 is used to RTM
     Capability when IS-IS used advertise RTM capabilities
(3) BGP-LS has been added as a RTM capability advertisement method

A side-by-side diff between version -12 and -13 is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-residence-time-13

Please send your comments to the mpls wg mailing list (mpls@ietf.org),
if you are not subscribed to the mpls wg list, send to "your own"
working group mailing list, and we'll make sure they are posted to the
MPLS wg list.

There were one IPR disclosure against this document.

All the authors and contributors have stated on the working group
mailing list that they are not aware of any other IPRs that relates
to this document.

This working group last call ends February 13, 2017.


/Loa
MPLS wg co-chairs
-- 


Loa Andersson                        email: loa@mail01.huawei.com
Senior MPLS Expert                          loa@pi.nu
Huawei Technologies (consultant)     phone: +46 739 81 21 64


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From: Uma Chunduri <uma.chunduri@huawei.com>
To: Stewart Bryant <stewart.bryant@gmail.com>, "Stefano Previdi (sprevidi)" <sprevidi@cisco.com>, Martin Horneffer <maho@nic.dtag.de>
Thread-Topic: [spring] WG Last Call for draft-ietf-spring-segment-routing-mpls-06
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Subject: Re: [mpls] [spring] WG Last Call for draft-ietf-spring-segment-routing-mpls-06
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Hi Martin, Stefano,

>It seems to me this could easily become an endless discussion again. Peopl=
e seem to have very different views on it. Thus I'm not sure whether it wou=
ld be suitable for this document.

Sorry, that was not at all my intention to get into an endless discussion.
Being an SR MPLS data plane document, I felt discussion or reference to SID=
 depth related aspects would be important. This is one of the aspects we co=
ntended with, when SR is being discussed in MBH deployments in my previous =
organization.

> The manageability section of the architecture draft mention that a node m=
ay want to signal its stack capabilities and we have igp extensions for tha=
t.

I am fine with referencing both or a summary as pointed by Stewart below at=
 some appropriate place in the document.

--
Uma C.


-----Original Message-----
From: Stewart Bryant [mailto:stewart.bryant@gmail.com]=20
Sent: Monday, January 30, 2017 3:51 AM
To: Stefano Previdi (sprevidi) <sprevidi@cisco.com>; Martin Horneffer <maho=
@nic.dtag.de>
Cc: draft-ietf-spring-segment-routing-mpls@ietf.org; spring@ietf.org; Marti=
n Vigoureux <martin.vigoureux@nokia.com>; Uma Chunduri <uma.chunduri@huawei=
.com>; mpls@ietf.org
Subject: Re: [spring] WG Last Call for draft-ietf-spring-segment-routing-mp=
ls-06

Stefano,

This is the document that someone interested in SR from and an MPLS perspec=
tive may well start with. A discussion on the issue of label stack depth an=
d the practical constrains is thus very much in scope. The fact that you ha=
d a debate in the past immediately points to the need for a summary of the =
key issues and conclusions in this document.

Stewart


On 30/01/2017 11:27, Stefano Previdi (sprevidi) wrote:
> I agree with Martin,
>
> I think we have discussed this at length and I wouldn't re-spin the debat=
e (and come to the same conclusion again and again). The manageability sect=
ion of the architecture draft mention that a node may want to signal its st=
ack capabilities and we have igp extensions for that.
>
> s.
>
>
>> On Jan 30, 2017, at 10:13 AM, Martin Horneffer <maho@nic.dtag.de> wrote:
>>
>> Hello Uma,
>>
>> what kind of label depth discussion are you thinking of?
>>
>> It seems to me this could easily become an endless discussion again. Peo=
ple seem to have very different views on it. Thus I'm not sure whether it w=
ould be suitable for this document.
>>
>> BTW:
>>
>> For my needs, bandwidth optimization is one of the major use cases for a=
ll traffic engineering technologies such as SR or RSVP.
>>
>> We are currently supporting scientific university research about this, a=
nd first results give strong confirmation that for bandwidth optimization i=
n real world networks you rarely need more than 1 additional segment. Or ra=
ther, the additional efficiency gained by using mor than 1 additional segme=
nt is very small. We compare a global real backbone network with current ro=
uting, theoretical MCF optimization and realistic optimization with 1 (or 2=
 or 3) additional traffic engineering segments (aka 2-SR, 3-SR, 4-SR).
>> Thus, from my point of view, an SR optimized network would typically hav=
e the same label stack depth as a similarily RSVP optimized network in some=
 places, and a smaller label stack for the overall average .
>>
>> All other use-cases I found of serious interest so far all work with 1 a=
dditional segment (i.e. label) at most.
>>
>> Best regards, Martin
>>
>>
>> Am 27.01.17 um 20:59 schrieb Uma Chunduri:
>>> Support.
>>>
>>> One quick comment:
>>>
>>> While section 3 correctly documents MPLS instantiation of SR -  given t=
he constructs SR has (ADJ SID for example) it's good to document SID/Label =
depth implications in the deployments.
>>>
>>> --
>>> Uma C.
>>>
>>> -----Original Message-----
>>> From: spring [mailto:spring-bounces@ietf.org] On Behalf Of Martin=20
>>> Vigoureux
>>> Sent: Friday, January 27, 2017 3:05 AM
>>> To: spring@ietf.org
>>> Cc: draft-ietf-spring-segment-routing-mpls@ietf.org
>>> Subject: [spring] WG Last Call for=20
>>> draft-ietf-spring-segment-routing-mpls-06
>>>
>>> Hello Working Group,
>>>
>>> This email starts a 2-week Working Group Last Call on
>>> draft-ietf-spring-segment-routing-mpls-06 [1].
>>>
>>> =A4 Please read the document if you haven't read the most recent versio=
n yet, and send your comments to the list, no later than the *12th of Febru=
ary*.
>>> Note that this is *not only* a call for comments on the document; it is=
 also a call for support (or not) to publish this document as a Proposed St=
andard RFC.
>>>
>>> =A4 We have already polled for IPR knowledge on this document and all A=
uthors have replied.
>>> IPR exists against this document and has been disclosed [2].
>>>
>>> Thank you
>>>
>>> M&B
>>>
>>> ---
>>> [1]=20
>>> https://datatracker.ietf.org/doc/draft-ietf-spring-segment-routing-m
>>> pls/
>>> [2]
>>> https://datatracker.ietf.org/ipr/search/?submit=3Ddraft&id=3Ddraft-ietf=
-
>>> spring-segment-routing-mpls
>>>
>>> _______________________________________________
>>> spring mailing list
>>> spring@ietf.org
>>> https://www.ietf.org/mailman/listinfo/spring
>>>
>>> _______________________________________________
>>> spring mailing list
>>> spring@ietf.org
>>> https://www.ietf.org/mailman/listinfo/spring
>>>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring


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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Loa Andersson <loa@pi.nu>, "mpls@ietf.org" <mpls@ietf.org>, TEAS WG <teas@ietf.org>, "ospf@ietf.org" <ospf@ietf.org>, Isis-wg <isis-wg-bounces@ietf.org>
Thread-Topic: Working group last call on draft-ietf-mpls-residence-time
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Date: Mon, 30 Jan 2017 18:31:57 +0000
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Subject: Re: [mpls] Working group last call on draft-ietf-mpls-residence-time
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Hi Loa, et al,=20

The addition of BGP-LS RTM capability advertisement satisfies my comment
and I support publication.

Thanks,
Acee

On 1/30/17, 10:01 AM, "Loa Andersson" <loa@pi.nu> wrote:

>Working Groups,
>
>This is to initiate a two week working group last call in four working
>groups on draft-ietf-mpls-residence-time-13.
>
>The MPLS working group has done an earlier working group last call and
>a request for publication has been made.
>
>The changes to the document were such that we decided to do a new
>working group last call and extend it to MPLS, TEAS, OSPF and IS-IS.
>
>There are three major changes between the version of the document for
>which publication was requested are:
>
>(1) that section 7 " One-step Clock and Two-step Clock Modes" has been
>     moved up to become section 2.1.
>(2) that a sub-TLV for TLV 22 instead of TLV 251 is used to RTM
>     Capability when IS-IS used advertise RTM capabilities
>(3) BGP-LS has been added as a RTM capability advertisement method
>
>A side-by-side diff between version -12 and -13 is available at:
>https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-mpls-residence-time-13
>
>Please send your comments to the mpls wg mailing list (mpls@ietf.org),
>if you are not subscribed to the mpls wg list, send to "your own"
>working group mailing list, and we'll make sure they are posted to the
>MPLS wg list.
>
>There were one IPR disclosure against this document.
>
>All the authors and contributors have stated on the working group
>mailing list that they are not aware of any other IPRs that relates
>to this document.
>
>This working group last call ends February 13, 2017.
>
>
>/Loa
>MPLS wg co-chairs
>--=20
>
>
>Loa Andersson                        email: loa@mail01.huawei.com
>Senior MPLS Expert                          loa@pi.nu
>Huawei Technologies (consultant)     phone: +46 739 81 21 64


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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: Loa Andersson <loa@pi.nu>, "mpls@ietf.org" <mpls@ietf.org>, TEAS WG <teas@ietf.org>, "ospf@ietf.org" <ospf@ietf.org>, Isis-wg <isis-wg-bounces@ietf.org>
Thread-Topic: [OSPF] Working group last call on draft-ietf-mpls-residence-time
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Subject: Re: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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--_000_d4ba0355c0db469ebbbb896717c5f911XCHALN001ciscocom_
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Loa -



The change for IS-IS encoding to utilize a sub-TLV of TLV 22 et al to adver=
tise RTM capability is a better solution than the previous proposal and thi=
s has my support.

However, there are some details as regards the proposed sub-TLV that should=
 be revised.



1)Rather than use a fixed 16 bit field for the flags I suggest you utilize =
the encoding style introduced in RFC 7794 (see Section 2.1) which allows fo=
r a variable length flags field. This addresses two issues:



   o You need never worry that the size of the flags field will be too smal=
l for future extensions

   o It minimizes the number of bytes required to be sent



The latter point is something IS-IS has always been more conservative about=
 than OSPF because of the fixed size of an LSP set which can be advertised =
by a single router.



2)In the IANA considerations you have limited the sub-TLV to being used in =
TLV 22 only, but there is no reason to do so. This does not allow MT to be =
supported and it needlessly prevents use of the sub-TLV by the RFC 5311 ext=
ensions (however unpopular those may be). I can understand why the sub-TLV =
may not be useful in TLV 141, therefore I suggest the table in Section 7.5 =
be revised to be:





    | Type | Description | 22 | 23 | 141 | 222 | 223 | Reference     |

   +------+-------------+----+----+-----+-----+-----+---------------+

  | TBA3 |    RTM       | y  | y  | n   | y   | y   | This document |

    +------+-------------+----+----+-----+-----+-----+---------------+



i.e. "y" for all but TLV 141 (in case the ASCII art doesn't translate well =
in your mailer).


You should also remove the reference to RFC 5305 in Section 4.5 as it is to=
o limiting. Simply referencing the IANA registry http://www.iana.org/assign=
ments/isis-tlv-codepoints/isis-tlv-codepoints.xhtml#isis-tlv-codepoints-22-=
23-141-222-223<http://www.iana.org/assignments/isis-tlv-codepoints/isis-tlv=
-codepoints.xhtml%23isis-tlv-codepoints-22-23-141-222-223> should be suffic=
ient. All necessary references can be found there.



3)An editorial correction:



Introduction 3rd paragraph:



s/ Althugh/ Although



   Les



> -----Original Message-----

> From: OSPF [mailto:ospf-bounces@ietf.org] On Behalf Of Loa Andersson

> Sent: Monday, January 30, 2017 8:02 AM

> To: mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg

> Cc: isis-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org; =
TEAS

> WG Chairs; mpls-chairs@ietf.org; ospf-chairs@ietf.org

> Subject: [OSPF] Working group last call on draft-ietf-mpls-residence-time

>

> Working Groups,

>

> This is to initiate a two week working group last call in four working gr=
oups on

> draft-ietf-mpls-residence-time-13.

>

> The MPLS working group has done an earlier working group last call and a

> request for publication has been made.

>

> The changes to the document were such that we decided to do a new

> working group last call and extend it to MPLS, TEAS, OSPF and IS-IS.

>

> There are three major changes between the version of the document for

> which publication was requested are:

>

> (1) that section 7 " One-step Clock and Two-step Clock Modes" has been

>      moved up to become section 2.1.

> (2) that a sub-TLV for TLV 22 instead of TLV 251 is used to RTM

>      Capability when IS-IS used advertise RTM capabilities

> (3) BGP-LS has been added as a RTM capability advertisement method

>

> A side-by-side diff between version -12 and -13 is available at:

> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-mpls-residence-time-13

>

> Please send your comments to the mpls wg mailing list (mpls@ietf.org<mail=
to:mpls@ietf.org>), if

> you are not subscribed to the mpls wg list, send to "your own"

> working group mailing list, and we'll make sure they are posted to the MP=
LS

> wg list.

>

> There were one IPR disclosure against this document.

>

> All the authors and contributors have stated on the working group mailing=
 list

> that they are not aware of any other IPRs that relates to this document.

>

> This working group last call ends February 13, 2017.

>

>

> /Loa

> MPLS wg co-chairs

> --

>

>

> Loa Andersson                        email: loa@mail01.huawei.com<mailto:=
loa@mail01.huawei.com>

> Senior MPLS Expert                          loa@pi.nu<mailto:loa@pi.nu>

> Huawei Technologies (consultant)     phone: +46 739 81 21 64

>

> _______________________________________________

> OSPF mailing list

> OSPF@ietf.org<mailto:OSPF@ietf.org>

> https://www.ietf.org/mailman/listinfo/ospf

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<div class=3D"WordSection1">
<p class=3D"MsoPlainText">Loa -<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">The change for IS-IS encoding to utilize a sub-TL=
V of TLV 22 et al to advertise RTM capability is a better solution than the=
 previous proposal and this has my support.<o:p></o:p></p>
<p class=3D"MsoPlainText">However, there are some details as regards the pr=
oposed sub-TLV that should be revised.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">1)Rather than use a fixed 16 bit field for the fl=
ags I suggest you utilize the encoding style introduced in RFC 7794 (see Se=
ction 2.1) which allows for a variable length flags field. This addresses t=
wo issues:<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; o You need never worry that the size=
 of the flags field will be too small for future extensions<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; o It minimizes the number of bytes r=
equired to be sent<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">The latter point is something IS-IS has always be=
en more conservative about than OSPF because of the fixed size of an LSP se=
t which can be advertised by a single router.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">2)In the IANA considerations you have limited the=
 sub-TLV to being used in TLV 22 only, but there is no reason to do so. Thi=
s does not allow MT to be supported and it needlessly prevents use of the s=
ub-TLV by the RFC 5311 extensions
 (however unpopular those may be). I can understand why the sub-TLV may not=
 be useful in TLV 141, therefore I suggest the table in Section 7.5 be revi=
sed to be:<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; | Type | Description | 22 | 23=
 | 141 | 222 | 223 | Reference&nbsp;&nbsp;&nbsp;&nbsp; |&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;&#43;------&#43;-------------&#=
43;----&#43;----&#43;-----&#43;-----&#43;-----&#43;---------------&#43;&nbs=
p;&nbsp;&nbsp;&nbsp;
<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;| TBA3 |&nbsp;&nbsp;&nbsp; RTM&nbsp;&=
nbsp;&nbsp;&nbsp; &nbsp;&nbsp;| y&nbsp; | y&nbsp; | n&nbsp;&nbsp; | y&nbsp;=
&nbsp; | y&nbsp;&nbsp; | This document |&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;
<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; &#43;------&#43;-------------&=
#43;----&#43;----&#43;-----&#43;-----&#43;-----&#43;---------------&#43;&nb=
sp;&nbsp;&nbsp;&nbsp;
<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">i.e. &quot;y&quot; for all but TLV 141 (in case t=
he ASCII art doesn't translate well in your mailer).<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">You should also remove the reference to RFC 5305 in =
Section 4.5 as it is too limiting. Simply referencing the IANA registry
<a href=3D"http://www.iana.org/assignments/isis-tlv-codepoints/isis-tlv-cod=
epoints.xhtml%23isis-tlv-codepoints-22-23-141-222-223">
http://www.iana.org/assignments/isis-tlv-codepoints/isis-tlv-codepoints.xht=
ml#isis-tlv-codepoints-22-23-141-222-223</a> should be sufficient. All nece=
ssary references can be found there.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">3)An editorial correction:<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Introduction 3<sup>rd</sup> paragraph:<o:p></o:p>=
</p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">s/ Althugh/ Although<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; Les<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&gt; -----Original Message-----</p>
<p class=3D"MsoPlainText">&gt; From: OSPF [mailto:ospf-bounces@ietf.org] On=
 Behalf Of Loa Andersson</p>
<p class=3D"MsoPlainText">&gt; Sent: Monday, January 30, 2017 8:02 AM</p>
<p class=3D"MsoPlainText">&gt; To: mpls@ietf.org; TEAS WG; ospf@ietf.org; I=
sis-wg</p>
<p class=3D"MsoPlainText">&gt; Cc: isis-chairs@ietf.org; draft-ietf-mpls-re=
sidence-time@tools.ietf.org; TEAS</p>
<p class=3D"MsoPlainText">&gt; WG Chairs; mpls-chairs@ietf.org; ospf-chairs=
@ietf.org</p>
<p class=3D"MsoPlainText">&gt; Subject: [OSPF] Working group last call on d=
raft-ietf-mpls-residence-time</p>
<p class=3D"MsoPlainText">&gt; </p>
<p class=3D"MsoPlainText">&gt; Working Groups,</p>
<p class=3D"MsoPlainText">&gt; </p>
<p class=3D"MsoPlainText">&gt; This is to initiate a two week working group=
 last call in four working groups on</p>
<p class=3D"MsoPlainText">&gt; draft-ietf-mpls-residence-time-13.</p>
<p class=3D"MsoPlainText">&gt; </p>
<p class=3D"MsoPlainText">&gt; The MPLS working group has done an earlier w=
orking group last call and a</p>
<p class=3D"MsoPlainText">&gt; request for publication has been made.</p>
<p class=3D"MsoPlainText">&gt; </p>
<p class=3D"MsoPlainText">&gt; The changes to the document were such that w=
e decided to do a new</p>
<p class=3D"MsoPlainText">&gt; working group last call and extend it to MPL=
S, TEAS, OSPF and IS-IS.</p>
<p class=3D"MsoPlainText">&gt; </p>
<p class=3D"MsoPlainText">&gt; There are three major changes between the ve=
rsion of the document for</p>
<p class=3D"MsoPlainText">&gt; which publication was requested are:</p>
<p class=3D"MsoPlainText">&gt; </p>
<p class=3D"MsoPlainText">&gt; (1) that section 7 &quot; One-step Clock and=
 Two-step Clock Modes&quot; has been</p>
<p class=3D"MsoPlainText">&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;moved up to be=
come section 2.1.</p>
<p class=3D"MsoPlainText">&gt; (2) that a sub-TLV for TLV 22 instead of TLV=
 251 is used to RTM</p>
<p class=3D"MsoPlainText">&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Capability whe=
n IS-IS used advertise RTM capabilities</p>
<p class=3D"MsoPlainText">&gt; (3) BGP-LS has been added as a RTM capabilit=
y advertisement method</p>
<p class=3D"MsoPlainText">&gt; </p>
<p class=3D"MsoPlainText">&gt; A side-by-side diff between version -12 and =
-13 is available at:</p>
<p class=3D"MsoPlainText">&gt; <a href=3D"https://www.ietf.org/rfcdiff?url2=
=3Ddraft-ietf-mpls-residence-time-13">
<span style=3D"color:windowtext;text-decoration:none">https://www.ietf.org/=
rfcdiff?url2=3Ddraft-ietf-mpls-residence-time-13</span></a></p>
<p class=3D"MsoPlainText">&gt; </p>
<p class=3D"MsoPlainText">&gt; Please send your comments to the mpls wg mai=
ling list (<a href=3D"mailto:mpls@ietf.org"><span style=3D"color:windowtext=
;text-decoration:none">mpls@ietf.org</span></a>), if</p>
<p class=3D"MsoPlainText">&gt; you are not subscribed to the mpls wg list, =
send to &quot;your own&quot;</p>
<p class=3D"MsoPlainText">&gt; working group mailing list, and we'll make s=
ure they are posted to the MPLS</p>
<p class=3D"MsoPlainText">&gt; wg list.</p>
<p class=3D"MsoPlainText">&gt; </p>
<p class=3D"MsoPlainText">&gt; There were one IPR disclosure against this d=
ocument.</p>
<p class=3D"MsoPlainText">&gt; </p>
<p class=3D"MsoPlainText">&gt; All the authors and contributors have stated=
 on the working group mailing list</p>
<p class=3D"MsoPlainText">&gt; that they are not aware of any other IPRs th=
at relates to this document.</p>
<p class=3D"MsoPlainText">&gt; </p>
<p class=3D"MsoPlainText">&gt; This working group last call ends February 1=
3, 2017.</p>
<p class=3D"MsoPlainText">&gt; </p>
<p class=3D"MsoPlainText">&gt; </p>
<p class=3D"MsoPlainText">&gt; /Loa</p>
<p class=3D"MsoPlainText">&gt; MPLS wg co-chairs</p>
<p class=3D"MsoPlainText">&gt; --</p>
<p class=3D"MsoPlainText">&gt; </p>
<p class=3D"MsoPlainText">&gt; </p>
<p class=3D"MsoPlainText">&gt; Loa Andersson&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; email: <a href=3D"mailto:loa@mail01.huawei=
.com">
<span style=3D"color:windowtext;text-decoration:none">loa@mail01.huawei.com=
</span></a></p>
<p class=3D"MsoPlainText">&gt; Senior MPLS Expert&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <a href=3D"mailto:loa@pi.=
nu">
<span style=3D"color:windowtext;text-decoration:none">loa@pi.nu</span></a><=
/p>
<p class=3D"MsoPlainText">&gt; Huawei Technologies (consultant)&nbsp;&nbsp;=
&nbsp;&nbsp; phone: &#43;46 739 81 21 64</p>
<p class=3D"MsoPlainText">&gt; </p>
<p class=3D"MsoPlainText">&gt; ____________________________________________=
___</p>
<p class=3D"MsoPlainText">&gt; OSPF mailing list</p>
<p class=3D"MsoPlainText">&gt; <a href=3D"mailto:OSPF@ietf.org"><span style=
=3D"color:windowtext;text-decoration:none">OSPF@ietf.org</span></a></p>
<p class=3D"MsoPlainText">&gt; <a href=3D"https://www.ietf.org/mailman/list=
info/ospf"><span style=3D"color:windowtext;text-decoration:none">https://ww=
w.ietf.org/mailman/listinfo/ospf</span></a></p>
</div>
</body>
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Mon, 30 Jan 2017 15:06:27 -0800
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To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
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Subject: Re: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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--001a113d4806899a93054757dde1
Content-Type: text/plain; charset=UTF-8

Hi Les,
thank you for your quick and thorough review of the changes. I'll work on
applying your suggestions and will share results shortly.

Regards,
Greg

On Mon, Jan 30, 2017 at 1:11 PM, Les Ginsberg (ginsberg) <ginsberg@cisco.com
> wrote:

> Loa -
>
>
>
> The change for IS-IS encoding to utilize a sub-TLV of TLV 22 et al to
> advertise RTM capability is a better solution than the previous proposal
> and this has my support.
>
> However, there are some details as regards the proposed sub-TLV that
> should be revised.
>
>
>
> 1)Rather than use a fixed 16 bit field for the flags I suggest you utilize
> the encoding style introduced in RFC 7794 (see Section 2.1) which allows
> for a variable length flags field. This addresses two issues:
>
>
>
>    o You need never worry that the size of the flags field will be too
> small for future extensions
>
>    o It minimizes the number of bytes required to be sent
>
>
>
> The latter point is something IS-IS has always been more conservative
> about than OSPF because of the fixed size of an LSP set which can be
> advertised by a single router.
>
>
>
> 2)In the IANA considerations you have limited the sub-TLV to being used in
> TLV 22 only, but there is no reason to do so. This does not allow MT to be
> supported and it needlessly prevents use of the sub-TLV by the RFC 5311
> extensions (however unpopular those may be). I can understand why the
> sub-TLV may not be useful in TLV 141, therefore I suggest the table in
> Section 7.5 be revised to be:
>
>
>
>
>
>     | Type | Description | 22 | 23 | 141 | 222 | 223 | Reference
> |
>
>    +------+-------------+----+----+-----+-----+-----+---------------+
>
>   | TBA3 |    RTM       | y  | y  | n   | y   | y   | This document
> |
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>
>
>
> i.e. "y" for all but TLV 141 (in case the ASCII art doesn't translate well
> in your mailer).
>
>
>
> You should also remove the reference to RFC 5305 in Section 4.5 as it is
> too limiting. Simply referencing the IANA registry http://www.iana.org/
> assignments/isis-tlv-codepoints/isis-tlv-codepoints.xhtml#isis-tlv-
> codepoints-22-23-141-222-223 should be sufficient. All necessary
> references can be found there.
>
>
>
> 3)An editorial correction:
>
>
>
> Introduction 3rd paragraph:
>
>
>
> s/ Althugh/ Although
>
>
>
>    Les
>
>
>
> > -----Original Message-----
>
> > From: OSPF [mailto:ospf-bounces@ietf.org] On Behalf Of Loa Andersson
>
> > Sent: Monday, January 30, 2017 8:02 AM
>
> > To: mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg
>
> > Cc: isis-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org;
> TEAS
>
> > WG Chairs; mpls-chairs@ietf.org; ospf-chairs@ietf.org
>
> > Subject: [OSPF] Working group last call on draft-ietf-mpls-residence-time
>
> >
>
> > Working Groups,
>
> >
>
> > This is to initiate a two week working group last call in four working
> groups on
>
> > draft-ietf-mpls-residence-time-13.
>
> >
>
> > The MPLS working group has done an earlier working group last call and a
>
> > request for publication has been made.
>
> >
>
> > The changes to the document were such that we decided to do a new
>
> > working group last call and extend it to MPLS, TEAS, OSPF and IS-IS.
>
> >
>
> > There are three major changes between the version of the document for
>
> > which publication was requested are:
>
> >
>
> > (1) that section 7 " One-step Clock and Two-step Clock Modes" has been
>
> >      moved up to become section 2.1.
>
> > (2) that a sub-TLV for TLV 22 instead of TLV 251 is used to RTM
>
> >      Capability when IS-IS used advertise RTM capabilities
>
> > (3) BGP-LS has been added as a RTM capability advertisement method
>
> >
>
> > A side-by-side diff between version -12 and -13 is available at:
>
> > https://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-residence-time-13
>
> >
>
> > Please send your comments to the mpls wg mailing list (mpls@ietf.org),
> if
>
> > you are not subscribed to the mpls wg list, send to "your own"
>
> > working group mailing list, and we'll make sure they are posted to the
> MPLS
>
> > wg list.
>
> >
>
> > There were one IPR disclosure against this document.
>
> >
>
> > All the authors and contributors have stated on the working group
> mailing list
>
> > that they are not aware of any other IPRs that relates to this document.
>
> >
>
> > This working group last call ends February 13, 2017.
>
> >
>
> >
>
> > /Loa
>
> > MPLS wg co-chairs
>
> > --
>
> >
>
> >
>
> > Loa Andersson                        email: loa@mail01.huawei.com
>
> > Senior MPLS Expert                          loa@pi.nu
>
> > Huawei Technologies (consultant)     phone: +46 739 81 21 64
>
> >
>
> > _______________________________________________
>
> > OSPF mailing list
>
> > OSPF@ietf.org
>
> > https://www.ietf.org/mailman/listinfo/ospf
>
> _______________________________________________
> OSPF mailing list
> OSPF@ietf.org
> https://www.ietf.org/mailman/listinfo/ospf
>
>

--001a113d4806899a93054757dde1
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Les,<div>thank you for your quick and thorough review o=
f the changes. I&#39;ll work on applying your suggestions and will share re=
sults shortly.</div><div><br></div><div>Regards,</div><div>Greg</div></div>=
<div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Mon, Jan 30, 2=
017 at 1:11 PM, Les Ginsberg (ginsberg) <span dir=3D"ltr">&lt;<a href=3D"ma=
ilto:ginsberg@cisco.com" target=3D"_blank">ginsberg@cisco.com</a>&gt;</span=
> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bo=
rder-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_1120586313869731696WordSection1">
<p class=3D"m_1120586313869731696MsoPlainText">Loa -<u></u><u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText">The change for IS-IS encodin=
g to utilize a sub-TLV of TLV 22 et al to advertise RTM capability is a bet=
ter solution than the previous proposal and this has my support.<u></u><u><=
/u></p>
<p class=3D"m_1120586313869731696MsoPlainText">However, there are some deta=
ils as regards the proposed sub-TLV that should be revised.<u></u><u></u></=
p>
<p class=3D"m_1120586313869731696MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText">1)Rather than use a fixed 16=
 bit field for the flags I suggest you utilize the encoding style introduce=
d in RFC 7794 (see Section 2.1) which allows for a variable length flags fi=
eld. This addresses two issues:<u></u><u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText">=C2=A0=C2=A0 o You need neve=
r worry that the size of the flags field will be too small for future exten=
sions<u></u><u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText">=C2=A0=C2=A0 o It minimizes =
the number of bytes required to be sent<u></u><u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText">The latter point is somethin=
g IS-IS has always been more conservative about than OSPF because of the fi=
xed size of an LSP set which can be advertised by a single router.<u></u><u=
></u></p>
<p class=3D"m_1120586313869731696MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText">2)In the IANA considerations=
 you have limited the sub-TLV to being used in TLV 22 only, but there is no=
 reason to do so. This does not allow MT to be supported and it needlessly =
prevents use of the sub-TLV by the RFC 5311 extensions
 (however unpopular those may be). I can understand why the sub-TLV may not=
 be useful in TLV 141, therefore I suggest the table in Section 7.5 be revi=
sed to be:<u></u><u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText">=C2=A0=C2=A0=C2=A0 | Type | =
Description | 22 | 23 | 141 | 222 | 223 | Reference=C2=A0=C2=A0=C2=A0=C2=A0=
 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0
<u></u><u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText">=C2=A0=C2=A0=C2=A0+------+--=
-----------+----+<wbr>----+-----+-----+-----+-------<wbr>--------+=C2=A0=C2=
=A0=C2=A0=C2=A0
<u></u><u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText">=C2=A0=C2=A0| TBA3 |=C2=A0=
=C2=A0=C2=A0 RTM=C2=A0=C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0| y=C2=A0 | y=C2=A0 | =
n=C2=A0=C2=A0 | y=C2=A0=C2=A0 | y=C2=A0=C2=A0 | This document |=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
<u></u><u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText">=C2=A0=C2=A0=C2=A0 +------+-=
------------+----+---<wbr>-+-----+-----+-----+----------<wbr>-----+=C2=A0=
=C2=A0=C2=A0=C2=A0
<u></u><u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText">i.e. &quot;y&quot; for all b=
ut TLV 141 (in case the ASCII art doesn&#39;t translate well in your mailer=
).<u></u><u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">You should also remove the reference to RFC 5305 in =
Section 4.5 as it is too limiting. Simply referencing the IANA registry
<a href=3D"http://www.iana.org/assignments/isis-tlv-codepoints/isis-tlv-cod=
epoints.xhtml%23isis-tlv-codepoints-22-23-141-222-223" target=3D"_blank">
http://www.iana.org/<wbr>assignments/isis-tlv-<wbr>codepoints/isis-tlv-<wbr=
>codepoints.xhtml#isis-tlv-<wbr>codepoints-22-23-141-222-223</a> should be =
sufficient. All necessary references can be found there.<u></u><u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText">3)An editorial correction:<u=
></u><u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText">Introduction 3<sup>rd</sup> =
paragraph:<u></u><u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText">s/ Althugh/ Although<u></u><=
u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText">=C2=A0=C2=A0 Les<u></u><u></=
u></p>
<p class=3D"m_1120586313869731696MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; -----Original Message--=
---</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; From: OSPF [mailto:<a h=
ref=3D"mailto:ospf-bounces@ietf.org" target=3D"_blank">ospf-bounces@ietf.or=
g</a>] On Behalf Of Loa Andersson</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; Sent: Monday, January 3=
0, 2017 8:02 AM</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; To: <a href=3D"mailto:m=
pls@ietf.org" target=3D"_blank">mpls@ietf.org</a>; TEAS WG; <a href=3D"mail=
to:ospf@ietf.org" target=3D"_blank">ospf@ietf.org</a>; Isis-wg</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; Cc: <a href=3D"mailto:i=
sis-chairs@ietf.org" target=3D"_blank">isis-chairs@ietf.org</a>; <a href=3D=
"mailto:draft-ietf-mpls-residence-time@tools.ietf.org" target=3D"_blank">dr=
aft-ietf-mpls-residence-<wbr>time@tools.ietf.org</a>; TEAS</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; WG Chairs; <a href=3D"m=
ailto:mpls-chairs@ietf.org" target=3D"_blank">mpls-chairs@ietf.org</a>; <a =
href=3D"mailto:ospf-chairs@ietf.org" target=3D"_blank">ospf-chairs@ietf.org=
</a></p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; Subject: [OSPF] Working=
 group last call on draft-ietf-mpls-residence-time</p><div><div class=3D"h5=
">
<p class=3D"m_1120586313869731696MsoPlainText">&gt; </p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; Working Groups,</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; </p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; This is to initiate a t=
wo week working group last call in four working groups on</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; draft-ietf-mpls-residen=
ce-<wbr>time-13.</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; </p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; The MPLS working group =
has done an earlier working group last call and a</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; request for publication=
 has been made.</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; </p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; The changes to the docu=
ment were such that we decided to do a new</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; working group last call=
 and extend it to MPLS, TEAS, OSPF and IS-IS.</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; </p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; There are three major c=
hanges between the version of the document for</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; which publication was r=
equested are:</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; </p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; (1) that section 7 &quo=
t; One-step Clock and Two-step Clock Modes&quot; has been</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; =C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0moved up to become section 2.1.</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; (2) that a sub-TLV for =
TLV 22 instead of TLV 251 is used to RTM</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; =C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0Capability when IS-IS used advertise RTM capabilities</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; (3) BGP-LS has been add=
ed as a RTM capability advertisement method</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; </p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; A side-by-side diff bet=
ween version -12 and -13 is available at:</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; <a href=3D"https://www.=
ietf.org/rfcdiff?url2=3Ddraft-ietf-mpls-residence-time-13" target=3D"_blank=
">
<span style=3D"color:windowtext;text-decoration:none">https://www.ietf.org/=
rfcdiff?<wbr>url2=3Ddraft-ietf-mpls-<wbr>residence-time-13</span></a></p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; </p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; Please send your commen=
ts to the mpls wg mailing list (<a href=3D"mailto:mpls@ietf.org" target=3D"=
_blank"><span style=3D"color:windowtext;text-decoration:none">mpls@ietf.org=
</span></a>), if</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; you are not subscribed =
to the mpls wg list, send to &quot;your own&quot;</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; working group mailing l=
ist, and we&#39;ll make sure they are posted to the MPLS</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; wg list.</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; </p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; There were one IPR disc=
losure against this document.</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; </p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; All the authors and con=
tributors have stated on the working group mailing list</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; that they are not aware=
 of any other IPRs that relates to this document.</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; </p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; This working group last=
 call ends February 13, 2017.</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; </p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; </p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; /Loa</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; MPLS wg co-chairs</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; --</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; </p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; </p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; Loa Andersson=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0=C2=A0 email: <a href=
=3D"mailto:loa@mail01.huawei.com" target=3D"_blank">
<span style=3D"color:windowtext;text-decoration:none">loa@mail01.huawei.com=
</span></a></p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; Senior MPLS Expert=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=
=A0 <a href=3D"mailto:loa@pi.nu" target=3D"_blank">
<span style=3D"color:windowtext;text-decoration:none">loa@pi.nu</span></a><=
/p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; Huawei Technologies (co=
nsultant)=C2=A0=C2=A0=C2=A0=C2=A0 phone: +46 739 81 21 64</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; </p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; _______________________=
_______<wbr>_________________</p>
</div></div><p class=3D"m_1120586313869731696MsoPlainText">&gt; OSPF mailin=
g list</p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; <a href=3D"mailto:OSPF@=
ietf.org" target=3D"_blank"><span style=3D"color:windowtext;text-decoration=
:none">OSPF@ietf.org</span></a></p>
<p class=3D"m_1120586313869731696MsoPlainText">&gt; <a href=3D"https://www.=
ietf.org/mailman/listinfo/ospf" target=3D"_blank"><span style=3D"color:wind=
owtext;text-decoration:none">https://www.ietf.org/mailman/<wbr>listinfo/osp=
f</span></a></p>
</div>
</div>

<br>______________________________<wbr>_________________<br>
OSPF mailing list<br>
<a href=3D"mailto:OSPF@ietf.org">OSPF@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/ospf" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/ospf</a><br>
<br></blockquote></div><br></div>

--001a113d4806899a93054757dde1--


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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Mon, 30 Jan 2017 22:36:10 -0800
Message-ID: <CA+RyBmXQxvg9k0f75f72PTGkVtQ0z3TUsMGjb38_E8eKvscX6w@mail.gmail.com>
To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/ldZPvfIPDnWGRJRRHCGUiycoZ3Q>
Cc: "mpls@ietf.org" <mpls@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, Isis-wg <isis-wg-bounces@ietf.org>, "draft-ietf-mpls-residence-time@tools.ietf.org" <draft-ietf-mpls-residence-time@tools.ietf.org>, TEAS WG Chairs <teas-chairs@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, TEAS WG <teas@ietf.org>, "ospf@ietf.org" <ospf@ietf.org>, "ospf-chairs@ietf.org" <ospf-chairs@ietf.org>
Subject: Re: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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Hi Les,
attached are diff and the updated version -14. Would be much obliged to
hear from you if the updates are according to your suggestions and address
your comments.

Kind regards,
Greg


On Mon, Jan 30, 2017 at 1:11 PM, Les Ginsberg (ginsberg) <ginsberg@cisco.com
> wrote:

> Loa -
>
>
>
> The change for IS-IS encoding to utilize a sub-TLV of TLV 22 et al to
> advertise RTM capability is a better solution than the previous proposal
> and this has my support.
>
> However, there are some details as regards the proposed sub-TLV that
> should be revised.
>
>
>
> 1)Rather than use a fixed 16 bit field for the flags I suggest you utilize
> the encoding style introduced in RFC 7794 (see Section 2.1) which allows
> for a variable length flags field. This addresses two issues:
>
>
>
>    o You need never worry that the size of the flags field will be too
> small for future extensions
>
>    o It minimizes the number of bytes required to be sent
>
>
>
> The latter point is something IS-IS has always been more conservative
> about than OSPF because of the fixed size of an LSP set which can be
> advertised by a single router.
>
>
>
> 2)In the IANA considerations you have limited the sub-TLV to being used in
> TLV 22 only, but there is no reason to do so. This does not allow MT to be
> supported and it needlessly prevents use of the sub-TLV by the RFC 5311
> extensions (however unpopular those may be). I can understand why the
> sub-TLV may not be useful in TLV 141, therefore I suggest the table in
> Section 7.5 be revised to be:
>
>
>
>
>
>     | Type | Description | 22 | 23 | 141 | 222 | 223 | Reference
> |
>
>    +------+-------------+----+----+-----+-----+-----+---------------+
>
>   | TBA3 |    RTM       | y  | y  | n   | y   | y   | This document
> |
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>
>
>
> i.e. "y" for all but TLV 141 (in case the ASCII art doesn't translate well
> in your mailer).
>
>
>
> You should also remove the reference to RFC 5305 in Section 4.5 as it is
> too limiting. Simply referencing the IANA registry http://www.iana.org/
> assignments/isis-tlv-codepoints/isis-tlv-codepoints.xhtml#isis-tlv-
> codepoints-22-23-141-222-223 should be sufficient. All necessary
> references can be found there.
>
>
>
> 3)An editorial correction:
>
>
>
> Introduction 3rd paragraph:
>
>
>
> s/ Althugh/ Although
>
>
>
>    Les
>
>
>
> > -----Original Message-----
>
> > From: OSPF [mailto:ospf-bounces@ietf.org] On Behalf Of Loa Andersson
>
> > Sent: Monday, January 30, 2017 8:02 AM
>
> > To: mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg
>
> > Cc: isis-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org;
> TEAS
>
> > WG Chairs; mpls-chairs@ietf.org; ospf-chairs@ietf.org
>
> > Subject: [OSPF] Working group last call on draft-ietf-mpls-residence-time
>
> >
>
> > Working Groups,
>
> >
>
> > This is to initiate a two week working group last call in four working
> groups on
>
> > draft-ietf-mpls-residence-time-13.
>
> >
>
> > The MPLS working group has done an earlier working group last call and a
>
> > request for publication has been made.
>
> >
>
> > The changes to the document were such that we decided to do a new
>
> > working group last call and extend it to MPLS, TEAS, OSPF and IS-IS.
>
> >
>
> > There are three major changes between the version of the document for
>
> > which publication was requested are:
>
> >
>
> > (1) that section 7 " One-step Clock and Two-step Clock Modes" has been
>
> >      moved up to become section 2.1.
>
> > (2) that a sub-TLV for TLV 22 instead of TLV 251 is used to RTM
>
> >      Capability when IS-IS used advertise RTM capabilities
>
> > (3) BGP-LS has been added as a RTM capability advertisement method
>
> >
>
> > A side-by-side diff between version -12 and -13 is available at:
>
> > https://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-residence-time-13
>
> >
>
> > Please send your comments to the mpls wg mailing list (mpls@ietf.org),
> if
>
> > you are not subscribed to the mpls wg list, send to "your own"
>
> > working group mailing list, and we'll make sure they are posted to the
> MPLS
>
> > wg list.
>
> >
>
> > There were one IPR disclosure against this document.
>
> >
>
> > All the authors and contributors have stated on the working group
> mailing list
>
> > that they are not aware of any other IPRs that relates to this document.
>
> >
>
> > This working group last call ends February 13, 2017.
>
> >
>
> >
>
> > /Loa
>
> > MPLS wg co-chairs
>
> > --
>
> >
>
> >
>
> > Loa Andersson                        email: loa@mail01.huawei.com
>
> > Senior MPLS Expert                          loa@pi.nu
>
> > Huawei Technologies (consultant)     phone: +46 739 81 21 64
>
> >
>
> > _______________________________________________
>
> > OSPF mailing list
>
> > OSPF@ietf.org
>
> > https://www.ietf.org/mailman/listinfo/ospf
>
> _______________________________________________
> OSPF mailing list
> OSPF@ietf.org
> https://www.ietf.org/mailman/listinfo/ospf
>
>

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Content-Type: text/html; charset=UTF-8
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<div dir=3D"ltr">Hi Les,<div>attached are diff and the updated version -14.=
 Would be much obliged to hear from you if the updates are according to you=
r suggestions and address your comments.</div><div><br></div><div>Kind rega=
rds,</div><div>Greg</div><div><br></div></div><div class=3D"gmail_extra"><b=
r><div class=3D"gmail_quote">On Mon, Jan 30, 2017 at 1:11 PM, Les Ginsberg =
(ginsberg) <span dir=3D"ltr">&lt;<a href=3D"mailto:ginsberg@cisco.com" targ=
et=3D"_blank">ginsberg@cisco.com</a>&gt;</span> wrote:<br><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_2337760234444598969WordSection1">
<p class=3D"m_2337760234444598969MsoPlainText">Loa -<u></u><u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText">The change for IS-IS encodin=
g to utilize a sub-TLV of TLV 22 et al to advertise RTM capability is a bet=
ter solution than the previous proposal and this has my support.<u></u><u><=
/u></p>
<p class=3D"m_2337760234444598969MsoPlainText">However, there are some deta=
ils as regards the proposed sub-TLV that should be revised.<u></u><u></u></=
p>
<p class=3D"m_2337760234444598969MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText">1)Rather than use a fixed 16=
 bit field for the flags I suggest you utilize the encoding style introduce=
d in RFC 7794 (see Section 2.1) which allows for a variable length flags fi=
eld. This addresses two issues:<u></u><u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText">=C2=A0=C2=A0 o You need neve=
r worry that the size of the flags field will be too small for future exten=
sions<u></u><u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText">=C2=A0=C2=A0 o It minimizes =
the number of bytes required to be sent<u></u><u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText">The latter point is somethin=
g IS-IS has always been more conservative about than OSPF because of the fi=
xed size of an LSP set which can be advertised by a single router.<u></u><u=
></u></p>
<p class=3D"m_2337760234444598969MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText">2)In the IANA considerations=
 you have limited the sub-TLV to being used in TLV 22 only, but there is no=
 reason to do so. This does not allow MT to be supported and it needlessly =
prevents use of the sub-TLV by the RFC 5311 extensions
 (however unpopular those may be). I can understand why the sub-TLV may not=
 be useful in TLV 141, therefore I suggest the table in Section 7.5 be revi=
sed to be:<u></u><u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText">=C2=A0=C2=A0=C2=A0 | Type | =
Description | 22 | 23 | 141 | 222 | 223 | Reference=C2=A0=C2=A0=C2=A0=C2=A0=
 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0
<u></u><u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText">=C2=A0=C2=A0=C2=A0+------+--=
-----------+----+<wbr>----+-----+-----+-----+-------<wbr>--------+=C2=A0=C2=
=A0=C2=A0=C2=A0
<u></u><u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText">=C2=A0=C2=A0| TBA3 |=C2=A0=
=C2=A0=C2=A0 RTM=C2=A0=C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0| y=C2=A0 | y=C2=A0 | =
n=C2=A0=C2=A0 | y=C2=A0=C2=A0 | y=C2=A0=C2=A0 | This document |=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
<u></u><u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText">=C2=A0=C2=A0=C2=A0 +------+-=
------------+----+---<wbr>-+-----+-----+-----+----------<wbr>-----+=C2=A0=
=C2=A0=C2=A0=C2=A0
<u></u><u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText">i.e. &quot;y&quot; for all b=
ut TLV 141 (in case the ASCII art doesn&#39;t translate well in your mailer=
).<u></u><u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">You should also remove the reference to RFC 5305 in =
Section 4.5 as it is too limiting. Simply referencing the IANA registry
<a href=3D"http://www.iana.org/assignments/isis-tlv-codepoints/isis-tlv-cod=
epoints.xhtml%23isis-tlv-codepoints-22-23-141-222-223" target=3D"_blank">
http://www.iana.org/<wbr>assignments/isis-tlv-<wbr>codepoints/isis-tlv-<wbr=
>codepoints.xhtml#isis-tlv-<wbr>codepoints-22-23-141-222-223</a> should be =
sufficient. All necessary references can be found there.<u></u><u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText">3)An editorial correction:<u=
></u><u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText">Introduction 3<sup>rd</sup> =
paragraph:<u></u><u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText">s/ Althugh/ Although<u></u><=
u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText">=C2=A0=C2=A0 Les<u></u><u></=
u></p>
<p class=3D"m_2337760234444598969MsoPlainText"><u></u>=C2=A0<u></u></p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; -----Original Message--=
---</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; From: OSPF [mailto:<a h=
ref=3D"mailto:ospf-bounces@ietf.org" target=3D"_blank">ospf-bounces@ietf.or=
g</a>] On Behalf Of Loa Andersson</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; Sent: Monday, January 3=
0, 2017 8:02 AM</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; To: <a href=3D"mailto:m=
pls@ietf.org" target=3D"_blank">mpls@ietf.org</a>; TEAS WG; <a href=3D"mail=
to:ospf@ietf.org" target=3D"_blank">ospf@ietf.org</a>; Isis-wg</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; Cc: <a href=3D"mailto:i=
sis-chairs@ietf.org" target=3D"_blank">isis-chairs@ietf.org</a>; <a href=3D=
"mailto:draft-ietf-mpls-residence-time@tools.ietf.org" target=3D"_blank">dr=
aft-ietf-mpls-residence-<wbr>time@tools.ietf.org</a>; TEAS</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; WG Chairs; <a href=3D"m=
ailto:mpls-chairs@ietf.org" target=3D"_blank">mpls-chairs@ietf.org</a>; <a =
href=3D"mailto:ospf-chairs@ietf.org" target=3D"_blank">ospf-chairs@ietf.org=
</a></p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; Subject: [OSPF] Working=
 group last call on draft-ietf-mpls-residence-time</p><div><div class=3D"h5=
">
<p class=3D"m_2337760234444598969MsoPlainText">&gt; </p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; Working Groups,</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; </p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; This is to initiate a t=
wo week working group last call in four working groups on</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; draft-ietf-mpls-residen=
ce-<wbr>time-13.</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; </p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; The MPLS working group =
has done an earlier working group last call and a</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; request for publication=
 has been made.</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; </p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; The changes to the docu=
ment were such that we decided to do a new</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; working group last call=
 and extend it to MPLS, TEAS, OSPF and IS-IS.</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; </p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; There are three major c=
hanges between the version of the document for</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; which publication was r=
equested are:</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; </p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; (1) that section 7 &quo=
t; One-step Clock and Two-step Clock Modes&quot; has been</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; =C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0moved up to become section 2.1.</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; (2) that a sub-TLV for =
TLV 22 instead of TLV 251 is used to RTM</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; =C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0Capability when IS-IS used advertise RTM capabilities</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; (3) BGP-LS has been add=
ed as a RTM capability advertisement method</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; </p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; A side-by-side diff bet=
ween version -12 and -13 is available at:</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; <a href=3D"https://www.=
ietf.org/rfcdiff?url2=3Ddraft-ietf-mpls-residence-time-13" target=3D"_blank=
">
<span style=3D"color:windowtext;text-decoration:none">https://www.ietf.org/=
rfcdiff?<wbr>url2=3Ddraft-ietf-mpls-<wbr>residence-time-13</span></a></p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; </p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; Please send your commen=
ts to the mpls wg mailing list (<a href=3D"mailto:mpls@ietf.org" target=3D"=
_blank"><span style=3D"color:windowtext;text-decoration:none">mpls@ietf.org=
</span></a>), if</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; you are not subscribed =
to the mpls wg list, send to &quot;your own&quot;</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; working group mailing l=
ist, and we&#39;ll make sure they are posted to the MPLS</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; wg list.</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; </p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; There were one IPR disc=
losure against this document.</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; </p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; All the authors and con=
tributors have stated on the working group mailing list</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; that they are not aware=
 of any other IPRs that relates to this document.</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; </p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; This working group last=
 call ends February 13, 2017.</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; </p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; </p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; /Loa</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; MPLS wg co-chairs</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; --</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; </p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; </p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; Loa Andersson=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0=C2=A0 email: <a href=
=3D"mailto:loa@mail01.huawei.com" target=3D"_blank">
<span style=3D"color:windowtext;text-decoration:none">loa@mail01.huawei.com=
</span></a></p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; Senior MPLS Expert=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=
=A0 <a href=3D"mailto:loa@pi.nu" target=3D"_blank">
<span style=3D"color:windowtext;text-decoration:none">loa@pi.nu</span></a><=
/p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; Huawei Technologies (co=
nsultant)=C2=A0=C2=A0=C2=A0=C2=A0 phone: +46 739 81 21 64</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; </p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; _______________________=
_______<wbr>_________________</p>
</div></div><p class=3D"m_2337760234444598969MsoPlainText">&gt; OSPF mailin=
g list</p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; <a href=3D"mailto:OSPF@=
ietf.org" target=3D"_blank"><span style=3D"color:windowtext;text-decoration=
:none">OSPF@ietf.org</span></a></p>
<p class=3D"m_2337760234444598969MsoPlainText">&gt; <a href=3D"https://www.=
ietf.org/mailman/listinfo/ospf" target=3D"_blank"><span style=3D"color:wind=
owtext;text-decoration:none">https://www.ietf.org/mailman/<wbr>listinfo/osp=
f</span></a></p>
</div>
</div>

<br>______________________________<wbr>_________________<br>
OSPF mailing list<br>
<a href=3D"mailto:OSPF@ietf.org">OSPF@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/ospf" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/ospf</a><br>
<br></blockquote></div><br></div>

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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [OSPF] Working group last call on draft-ietf-mpls-residence-time
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Subject: Re: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Mon, 30 Jan 2017 23:42:51 -0800
Message-ID: <CA+RyBmWZZmHuwy3xWQxRLz5jTLYpvFd-NADfuE_TygVk=JDbYA@mail.gmail.com>
To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/0B1pIoWLIXd0r03uxyJJMj1DltI>
Cc: "mpls@ietf.org" <mpls@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, Isis-wg <isis-wg-bounces@ietf.org>, "draft-ietf-mpls-residence-time@tools.ietf.org" <draft-ietf-mpls-residence-time@tools.ietf.org>, TEAS WG Chairs <teas-chairs@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, TEAS WG <teas@ietf.org>, "ospf@ietf.org" <ospf@ietf.org>, "ospf-chairs@ietf.org" <ospf-chairs@ietf.org>
Subject: Re: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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Hi Les,
many thanks for your the most detailed suggestions. Hope I've it right.

Regards,
Greg

On Mon, Jan 30, 2017 at 11:04 PM, Les Ginsberg (ginsberg) <
ginsberg@cisco.com> wrote:

> Greg =E2=80=93
>
>
>
> Thanx for the quick turnaround.
>
>
>
> Section 4.5 (revised text)
>
>
>
>    The capability to support RTM on a particular link (interface) is
>
>    advertised in a new sub-TLV which may be included in TLVs advertising
>
>    Intemediate System (IS) Reachability on a specific link (TLVs 22, 23,
> 222, and 223).
>
>
>
>    The format for the RTM Capabilities sub-TLV is presented in Figure 5
>
>
>
>      0                   1                   2
>
>      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 ...
>
>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...
>
>     |      Type     |     Length    | RTM |              ...
>
>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...
>
>
>
>    Figure 5: RTM Capability sub-TLV
>
>
>
> =E2=80=A6 (Remainder unchanged)
>
>
>
> Section 7.5 (revised text)
>
>
>
> 7.5.  IS-IS RTM Capability sub-TLV
>
>
>
>    IANA is requested to assign a new Type for RTM capability sub-TLV
>
>    from the Sub-TLVs for TLVs 22, 23, 141, 222, and 223 registry as
>
>    follows:
>
>
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>     | Type | Description | 22 | 23 | 141 | 222 | 223 | Reference     |
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>     | TBA3 |     RTM      | y  | y  | n   | y   | y   | This document |
>
>     |           | Capability |      |     |      |       |
> |                                |
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>
>
>              Table 5: IS-IS RTM Capability sub-TLV Registry Description
>
>
>
>
>
> Thanx.
>
>
>
>     Les
>
>
>
> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com]
> *Sent:* Monday, January 30, 2017 10:36 PM
> *To:* Les Ginsberg (ginsberg)
> *Cc:* Loa Andersson; mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg;
> ospf-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org; TEAS
> WG Chairs; isis-chairs@ietf.org; mpls-chairs@ietf.org
> *Subject:* Re: [OSPF] Working group last call on
> draft-ietf-mpls-residence-time
>
>
>
> Hi Les,
>
> attached are diff and the updated version -14. Would be much obliged to
> hear from you if the updates are according to your suggestions and addres=
s
> your comments.
>
>
>
> Kind regards,
>
> Greg
>
>
>
>
>
> On Mon, Jan 30, 2017 at 1:11 PM, Les Ginsberg (ginsberg) <
> ginsberg@cisco.com> wrote:
>
> Loa -
>
>
>
> The change for IS-IS encoding to utilize a sub-TLV of TLV 22 et al to
> advertise RTM capability is a better solution than the previous proposal
> and this has my support.
>
> However, there are some details as regards the proposed sub-TLV that
> should be revised.
>
>
>
> 1)Rather than use a fixed 16 bit field for the flags I suggest you utiliz=
e
> the encoding style introduced in RFC 7794 (see Section 2.1) which allows
> for a variable length flags field. This addresses two issues:
>
>
>
>    o You need never worry that the size of the flags field will be too
> small for future extensions
>
>    o It minimizes the number of bytes required to be sent
>
>
>
> The latter point is something IS-IS has always been more conservative
> about than OSPF because of the fixed size of an LSP set which can be
> advertised by a single router.
>
>
>
> 2)In the IANA considerations you have limited the sub-TLV to being used i=
n
> TLV 22 only, but there is no reason to do so. This does not allow MT to b=
e
> supported and it needlessly prevents use of the sub-TLV by the RFC 5311
> extensions (however unpopular those may be). I can understand why the
> sub-TLV may not be useful in TLV 141, therefore I suggest the table in
> Section 7.5 be revised to be:
>
>
>
>
>
>     | Type | Description | 22 | 23 | 141 | 222 | 223 | Reference
> |
>
>    +------+-------------+----+----+-----+-----+-----+---------------+
>
>   | TBA3 |    RTM       | y  | y  | n   | y   | y   | This document
> |
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>
>
>
> i.e. "y" for all but TLV 141 (in case the ASCII art doesn't translate wel=
l
> in your mailer).
>
>
>
> You should also remove the reference to RFC 5305 in Section 4.5 as it is
> too limiting. Simply referencing the IANA registry http://www.iana.org/
> assignments/isis-tlv-codepoints/isis-tlv-codepoints.xhtml#isis-tlv-
> codepoints-22-23-141-222-223 should be sufficient. All necessary
> references can be found there.
>
>
>
> 3)An editorial correction:
>
>
>
> Introduction 3rd paragraph:
>
>
>
> s/ Althugh/ Although
>
>
>
>    Les
>
>
>
> > -----Original Message-----
>
> > From: OSPF [mailto:ospf-bounces@ietf.org] On Behalf Of Loa Andersson
>
> > Sent: Monday, January 30, 2017 8:02 AM
>
> > To: mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg
>
> > Cc: isis-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org=
;
> TEAS
>
> > WG Chairs; mpls-chairs@ietf.org; ospf-chairs@ietf.org
>
> > Subject: [OSPF] Working group last call on draft-ietf-mpls-residence-ti=
me
>
> >
>
> > Working Groups,
>
> >
>
> > This is to initiate a two week working group last call in four working
> groups on
>
> > draft-ietf-mpls-residence-time-13.
>
> >
>
> > The MPLS working group has done an earlier working group last call and =
a
>
> > request for publication has been made.
>
> >
>
> > The changes to the document were such that we decided to do a new
>
> > working group last call and extend it to MPLS, TEAS, OSPF and IS-IS.
>
> >
>
> > There are three major changes between the version of the document for
>
> > which publication was requested are:
>
> >
>
> > (1) that section 7 " One-step Clock and Two-step Clock Modes" has been
>
> >      moved up to become section 2.1.
>
> > (2) that a sub-TLV for TLV 22 instead of TLV 251 is used to RTM
>
> >      Capability when IS-IS used advertise RTM capabilities
>
> > (3) BGP-LS has been added as a RTM capability advertisement method
>
> >
>
> > A side-by-side diff between version -12 and -13 is available at:
>
> > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-mpls-residence-time-13
>
> >
>
> > Please send your comments to the mpls wg mailing list (mpls@ietf.org),
> if
>
> > you are not subscribed to the mpls wg list, send to "your own"
>
> > working group mailing list, and we'll make sure they are posted to the
> MPLS
>
> > wg list.
>
> >
>
> > There were one IPR disclosure against this document.
>
> >
>
> > All the authors and contributors have stated on the working group
> mailing list
>
> > that they are not aware of any other IPRs that relates to this document=
.
>
> >
>
> > This working group last call ends February 13, 2017.
>
> >
>
> >
>
> > /Loa
>
> > MPLS wg co-chairs
>
> > --
>
> >
>
> >
>
> > Loa Andersson                        email: loa@mail01.huawei.com
>
> > Senior MPLS Expert                          loa@pi.nu
>
> > Huawei Technologies (consultant)     phone: +46 739 81 21 64
>
> >
>
> > _______________________________________________
>
> > OSPF mailing list
>
> > OSPF@ietf.org
>
> > https://www.ietf.org/mailman/listinfo/ospf
>
>
> _______________________________________________
> OSPF mailing list
> OSPF@ietf.org
> https://www.ietf.org/mailman/listinfo/ospf
>
>
>

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<div dir=3D"ltr">Hi Les,<div>many thanks for your the most detailed suggest=
ions. Hope I&#39;ve it right.</div><div><br></div><div>Regards,</div><div>G=
reg</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On=
 Mon, Jan 30, 2017 at 11:04 PM, Les Ginsberg (ginsberg) <span dir=3D"ltr">&=
lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@cisco.c=
om</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"marg=
in:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_8733016173006011846WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Greg =E2=80=93<u></u><u><=
/u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Thanx for the quick turna=
round.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Section 4.5 (revised text=
)<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 The capabili=
ty to support RTM on a particular link (interface) is<u></u><u></u></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 advertised i=
n a new sub-TLV which may be included in TLVs advertising<u></u><u></u></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 Intemediate =
System (IS) Reachability on a specific link (TLVs 22, 23, 222, and 223).<u>=
</u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 The format f=
or the RTM Capabilities sub-TLV is presented in Figure 5<u></u><u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0=C2=A0 =
0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 2<=
u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0=C2=A0 =
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 ...<u></u><u></u></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 +-+-+-=
+-+-+-+-+-+-+-+-+-+-+-+-<wbr>+-+-+-+-+-+-+-+-+-+-+-+...<u></u><u></u></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 |=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0 Type=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=
=A0=C2=A0 Length=C2=A0=C2=A0=C2=A0 | RTM |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 ...<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 +-+-+-=
+-+-+-+-+-+-+-+-+-+-+-+-<wbr>+-+-+-+-+-+-+-+-+-+-+-+...<u></u><u></u></span=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 Figure 5: RT=
M Capability sub-TLV<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=E2=80=A6 (Remainder unch=
anged)<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Section 7.5 (revised text=
)<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">7.5.=C2=A0 IS-IS RTM Capa=
bility sub-TLV
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 IANA is requ=
ested to assign a new Type for RTM capability sub-TLV<u></u><u></u></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 from the Sub=
-TLVs for TLVs 22, 23, 141, 222, and 223 registry as<u></u><u></u></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 follows:<u><=
/u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 +-----=
-+-------------+----+---<wbr>-+-----+-----+-----+----------<wbr>-----+<u></=
u><u></u></span></p><span class=3D"">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 | Type=
 | Description | 22 | 23 | 141 | 222 | 223 | Reference=C2=A0=C2=A0=C2=A0=C2=
=A0 |<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 +-----=
-+-------------+----+---<wbr>-+-----+-----+-----+----------<wbr>-----+<u></=
u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 | TBA3=
 |=C2=A0=C2=A0=C2=A0=C2=A0 RTM =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0| y=C2=A0 | y=
=C2=A0 | n=C2=A0=C2=A0 | y=C2=A0=C2=A0 | y=C2=A0=C2=A0 | This document |<u>=
</u><u></u></span></p>
</span><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&=
quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0=
 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | Capability=
 |=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0|=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0=C2=A0 |<u></u><u></u></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 +-----=
-+-------------+----+---<wbr>-+-----+-----+-----+----------<wbr>-----+<u></=
u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Table 5: IS-IS RTM Capabil=
ity sub-TLV Registry Description<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Thanx.<u></u><u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 Les<u>=
</u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Greg Mir=
sky [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">greg=
imirsky@gmail.com</a>]
<br>
<b>Sent:</b> Monday, January 30, 2017 10:36 PM<br>
<b>To:</b> Les Ginsberg (ginsberg)<br>
<b>Cc:</b> Loa Andersson; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>; TEAS WG; <a href=3D"mailto:ospf@ietf.org" target=3D"_b=
lank">ospf@ietf.org</a>; Isis-wg; <a href=3D"mailto:ospf-chairs@ietf.org" t=
arget=3D"_blank">ospf-chairs@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpl=
s-residence-time@tools.ietf.org" target=3D"_blank">draft-ietf-mpls-residenc=
e-<wbr>time@tools.ietf.org</a>; TEAS WG Chairs; <a href=3D"mailto:isis-chai=
rs@ietf.org" target=3D"_blank">isis-chairs@ietf.org</a>; <a href=3D"mailto:=
mpls-chairs@ietf.org" target=3D"_blank">mpls-chairs@ietf.org</a><br>
<b>Subject:</b> Re: [OSPF] Working group last call on draft-ietf-mpls-resid=
ence-time<u></u><u></u></span></p>
</div>
</div><div><div class=3D"h5">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">Hi Les,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">attached are diff and the updated version -14. Would=
 be much obliged to hear from you if the updates are according to your sugg=
estions and address your comments.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Kind regards,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Greg<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Mon, Jan 30, 2017 at 1:11 PM, Les Ginsberg (ginsb=
erg) &lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@c=
isco.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">Loa -<u>=
</u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0<u=
></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">The chan=
ge for IS-IS encoding to utilize a sub-TLV of TLV 22 et al to advertise RTM=
 capability is a better solution than the previous proposal and this has my=
 support.<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">However,=
 there are some details as regards the proposed sub-TLV that should be revi=
sed.<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0<u=
></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">1)Rather=
 than use a fixed 16 bit field for the flags I suggest you utilize the enco=
ding style introduced in RFC 7794 (see Section 2.1) which allows for a vari=
able length flags field. This addresses two issues:<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0<u=
></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0=
=C2=A0 o You need never worry that the size of the flags field will be too =
small for future extensions<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0=
=C2=A0 o It minimizes the number of bytes required to be sent<u></u><u></u>=
</p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0<u=
></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">The latt=
er point is something IS-IS has always been more conservative about than OS=
PF because of the fixed size of an LSP set which can be advertised by a sin=
gle router.<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0<u=
></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">2)In the=
 IANA considerations you have limited the sub-TLV to being used in TLV 22 o=
nly, but there is no reason to do so. This does not allow MT to be supporte=
d and it needlessly prevents use of the sub-TLV by the
 RFC 5311 extensions (however unpopular those may be). I can understand why=
 the sub-TLV may not be useful in TLV 141, therefore I suggest the table in=
 Section 7.5 be revised to be:<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0<u=
></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0<u=
></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0=
=C2=A0=C2=A0 | Type | Description | 22 | 23 | 141 | 222 | 223 | Reference=
=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0=
=C2=A0=C2=A0+------+-------------+----+<wbr>----+-----+-----+-----+-------<=
wbr>--------+=C2=A0=C2=A0=C2=A0=C2=A0
<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0=
=C2=A0| TBA3 |=C2=A0=C2=A0=C2=A0 RTM=C2=A0=C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0| =
y=C2=A0 | y=C2=A0 | n=C2=A0=C2=A0 | y=C2=A0=C2=A0 | y=C2=A0=C2=A0 | This do=
cument |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0=
=C2=A0=C2=A0 +------+-------------+----+---<wbr>-+-----+-----+-----+-------=
---<wbr>-----+=C2=A0=C2=A0=C2=A0=C2=A0
<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0<u=
></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">i.e. &qu=
ot;y&quot; for all but TLV 141 (in case the ASCII art doesn&#39;t translate=
 well in your mailer).<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0<u=
></u><u></u></p>
<p class=3D"MsoNormal">You should also remove the reference to RFC 5305 in =
Section 4.5 as it is too limiting. Simply referencing the IANA registry
<a href=3D"http://www.iana.org/assignments/isis-tlv-codepoints/isis-tlv-cod=
epoints.xhtml%23isis-tlv-codepoints-22-23-141-222-223" target=3D"_blank">
http://www.iana.org/<wbr>assignments/isis-tlv-<wbr>codepoints/isis-tlv-<wbr=
>codepoints.xhtml#isis-tlv-<wbr>codepoints-22-23-141-222-223</a> should be =
sufficient. All necessary references can be found there.<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0<u=
></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">3)An edi=
torial correction:<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0<u=
></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">Introduc=
tion 3<sup>rd</sup> paragraph:<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0<u=
></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">s/ Althu=
gh/ Although<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0<u=
></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0=
=C2=A0 Les<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">=C2=A0<u=
></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; ---=
--Original Message-----<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; Fro=
m: OSPF [mailto:<a href=3D"mailto:ospf-bounces@ietf.org" target=3D"_blank">=
ospf-bounces@ietf.org</a>] On Behalf Of Loa Andersson<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; Sen=
t: Monday, January 30, 2017 8:02 AM<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; To:=
 <a href=3D"mailto:mpls@ietf.org" target=3D"_blank">
mpls@ietf.org</a>; TEAS WG; <a href=3D"mailto:ospf@ietf.org" target=3D"_bla=
nk">ospf@ietf.org</a>; Isis-wg<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; Cc:=
 <a href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time@=
tools.ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-<wbr>time@tools.ietf.org</a>; TEAS<u></u><u></u><=
/p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; WG =
Chairs; <a href=3D"mailto:mpls-chairs@ietf.org" target=3D"_blank">
mpls-chairs@ietf.org</a>; <a href=3D"mailto:ospf-chairs@ietf.org" target=3D=
"_blank">ospf-chairs@ietf.org</a><u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; Sub=
ject: [OSPF] Working group last call on draft-ietf-mpls-residence-time<u></=
u><u></u></p>
<div>
<div>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <u>=
</u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; Wor=
king Groups,<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <u>=
</u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; Thi=
s is to initiate a two week working group last call in four working groups =
on<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; dra=
ft-ietf-mpls-residence-<wbr>time-13.<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <u>=
</u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; The=
 MPLS working group has done an earlier working group last call and a<u></u=
><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; req=
uest for publication has been made.<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <u>=
</u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; The=
 changes to the document were such that we decided to do a new<u></u><u></u=
></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; wor=
king group last call and extend it to MPLS, TEAS, OSPF and IS-IS.<u></u><u>=
</u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <u>=
</u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; The=
re are three major changes between the version of the document for<u></u><u=
></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; whi=
ch publication was requested are:<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <u>=
</u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; (1)=
 that section 7 &quot; One-step Clock and Two-step Clock Modes&quot; has be=
en<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; =C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0moved up to become section 2.1.<u></u><u></u></p=
>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; (2)=
 that a sub-TLV for TLV 22 instead of TLV 251 is used to RTM<u></u><u></u><=
/p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; =C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0Capability when IS-IS used advertise RTM capabil=
ities<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; (3)=
 BGP-LS has been added as a RTM capability advertisement method<u></u><u></=
u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <u>=
</u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; A s=
ide-by-side diff between version -12 and -13 is available at:<u></u><u></u>=
</p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <a =
href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-mpls-residence-time-=
13" target=3D"_blank">
<span style=3D"color:windowtext;text-decoration:none">https://www.ietf.org/=
rfcdiff?<wbr>url2=3Ddraft-ietf-mpls-<wbr>residence-time-13</span></a><u></u=
><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <u>=
</u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; Ple=
ase send your comments to the mpls wg mailing list (<a href=3D"mailto:mpls@=
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<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; wor=
king group mailing list, and we&#39;ll make sure they are posted to the MPL=
S<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; wg =
list.<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <u>=
</u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; The=
re were one IPR disclosure against this document.<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <u>=
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<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; All=
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<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; tha=
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<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <u>=
</u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; Thi=
s working group last call ends February 13, 2017.<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <u>=
</u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <u>=
</u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; /Lo=
a<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; MPL=
S wg co-chairs<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; --<=
u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <u>=
</u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <u>=
</u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; Loa=
 Andersson=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
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=C2=A0 email:
<a href=3D"mailto:loa@mail01.huawei.com" target=3D"_blank"><span style=3D"c=
olor:windowtext;text-decoration:none">loa@mail01.huawei.com</span></a><u></=
u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; Sen=
ior MPLS Expert=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
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=A0=C2=A0<wbr>=C2=A0
<a href=3D"mailto:loa@pi.nu" target=3D"_blank"><span style=3D"color:windowt=
ext;text-decoration:none">loa@pi.nu</span></a><u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; Hua=
wei Technologies (consultant)=C2=A0=C2=A0=C2=A0=C2=A0 phone: +46 739 81 21 =
64<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <u>=
</u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; ___=
___________________________<wbr>_________________<u></u><u></u></p>
</div>
</div>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; OSP=
F mailing list<u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <a =
href=3D"mailto:OSPF@ietf.org" target=3D"_blank">
<span style=3D"color:windowtext;text-decoration:none">OSPF@ietf.org</span><=
/a><u></u><u></u></p>
<p class=3D"m_8733016173006011846m2337760234444598969msoplaintext">&gt; <a =
href=3D"https://www.ietf.org/mailman/listinfo/ospf" target=3D"_blank">
<span style=3D"color:windowtext;text-decoration:none">https://www.ietf.org/=
mailman/<wbr>listinfo/ospf</span></a><u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
______________________________<wbr>_________________<br>
OSPF mailing list<br>
<a href=3D"mailto:OSPF@ietf.org" target=3D"_blank">OSPF@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/ospf" target=3D"_blank">ht=
tps://www.ietf.org/mailman/<wbr>listinfo/ospf</a><u></u><u></u></p>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div></div></div>
</div>
</div>

</blockquote></div><br></div>

--001a113cfdc8512c8e05475f142d--

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From: "Stefano Previdi (sprevidi)" <sprevidi@cisco.com>
To: "maho@nic.dtag.de" <maho@nic.dtag.de>, "stewart.bryant@gmail.com" <stewart.bryant@gmail.com>, "uma.chunduri@huawei.com" <uma.chunduri@huawei.com>
Thread-Topic: [spring] WG Last Call for draft-ietf-spring-segment-routing-mpls-06
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Date: Tue, 31 Jan 2017 08:28:14 +0000
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Cc: "mpls@ietf.org" <mpls@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "draft-ietf-spring-segment-routing-mpls@ietf.org" <draft-ietf-spring-segment-routing-mpls@ietf.org>
Subject: Re: [mpls] [spring] WG Last Call for draft-ietf-spring-segment-routing-mpls-06
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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [OSPF] Working group last call on draft-ietf-mpls-residence-time
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Date: Tue, 31 Jan 2017 13:07:23 +0000
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Subject: Re: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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From nobody Tue Jan 31 08:05:50 2017
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Tue, 31 Jan 2017 08:05:41 -0800
Message-ID: <CA+RyBmV2OEp_TzSqMxH8pWxBP4sihLoY91fnSZ1eLgcxO35HzA@mail.gmail.com>
To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
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Cc: "mpls@ietf.org" <mpls@ietf.org>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, Isis-wg <isis-wg-bounces@ietf.org>, "draft-ietf-mpls-residence-time@tools.ietf.org" <draft-ietf-mpls-residence-time@tools.ietf.org>, TEAS WG Chairs <teas-chairs@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, TEAS WG <teas@ietf.org>, "ospf@ietf.org" <ospf@ietf.org>, "ospf-chairs@ietf.org" <ospf-chairs@ietf.org>
Subject: Re: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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Hi Les,
thank you for your patience and apologies for missing it.
Diff and the update been attached.

Regards,
Greg

On Tue, Jan 31, 2017 at 5:07 AM, Les Ginsberg (ginsberg) <ginsberg@cisco.co=
m
> wrote:

> Greg =E2=80=93
>
>
>
> Almost=E2=80=A6
>
>
>
> Please change the title of Section 7.5 to =E2=80=9CIS-IS RTM Capability s=
ub-TLV=E2=80=9D.
>
>
>
> Please change the title of Table 5 to =E2=80=9CIS-IS RTM Capability sub-T=
LV
> Registry Description=E2=80=9D.
>
>
>
> The common point being since this is not exclusively for TLV 22 we do not
> want to say =E2=80=9Cfor TLV 22=E2=80=9D.
>
> Thanx.
>
>
>
>     Les
>
>
>
>
>
> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com]
> *Sent:* Monday, January 30, 2017 11:43 PM
>
> *To:* Les Ginsberg (ginsberg)
> *Cc:* Loa Andersson; mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg;
> ospf-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org; TEAS
> WG Chairs; isis-chairs@ietf.org; mpls-chairs@ietf.org
> *Subject:* Re: [OSPF] Working group last call on
> draft-ietf-mpls-residence-time
>
>
>
> Hi Les,
>
> many thanks for your the most detailed suggestions. Hope I've it right.
>
>
>
> Regards,
>
> Greg
>
>
>
> On Mon, Jan 30, 2017 at 11:04 PM, Les Ginsberg (ginsberg) <
> ginsberg@cisco.com> wrote:
>
> Greg =E2=80=93
>
>
>
> Thanx for the quick turnaround.
>
>
>
> Section 4.5 (revised text)
>
>
>
>    The capability to support RTM on a particular link (interface) is
>
>    advertised in a new sub-TLV which may be included in TLVs advertising
>
>    Intemediate System (IS) Reachability on a specific link (TLVs 22, 23,
> 222, and 223).
>
>
>
>    The format for the RTM Capabilities sub-TLV is presented in Figure 5
>
>
>
>      0                   1                   2
>
>      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 ...
>
>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...
>
>     |      Type     |     Length    | RTM |              ...
>
>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...
>
>
>
>    Figure 5: RTM Capability sub-TLV
>
>
>
> =E2=80=A6 (Remainder unchanged)
>
>
>
> Section 7.5 (revised text)
>
>
>
> 7.5.  IS-IS RTM Capability sub-TLV
>
>
>
>    IANA is requested to assign a new Type for RTM capability sub-TLV
>
>    from the Sub-TLVs for TLVs 22, 23, 141, 222, and 223 registry as
>
>    follows:
>
>
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>     | Type | Description | 22 | 23 | 141 | 222 | 223 | Reference     |
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>     | TBA3 |     RTM      | y  | y  | n   | y   | y   | This document |
>
>     |           | Capability |      |     |      |       |
> |                                |
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>
>
>              Table 5: IS-IS RTM Capability sub-TLV Registry Description
>
>
>
>
>
> Thanx.
>
>
>
>     Les
>
>
>
> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com]
> *Sent:* Monday, January 30, 2017 10:36 PM
> *To:* Les Ginsberg (ginsberg)
> *Cc:* Loa Andersson; mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg;
> ospf-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org; TEAS
> WG Chairs; isis-chairs@ietf.org; mpls-chairs@ietf.org
> *Subject:* Re: [OSPF] Working group last call on
> draft-ietf-mpls-residence-time
>
>
>
> Hi Les,
>
> attached are diff and the updated version -14. Would be much obliged to
> hear from you if the updates are according to your suggestions and addres=
s
> your comments.
>
>
>
> Kind regards,
>
> Greg
>
>
>
>
>
> On Mon, Jan 30, 2017 at 1:11 PM, Les Ginsberg (ginsberg) <
> ginsberg@cisco.com> wrote:
>
> Loa -
>
>
>
> The change for IS-IS encoding to utilize a sub-TLV of TLV 22 et al to
> advertise RTM capability is a better solution than the previous proposal
> and this has my support.
>
> However, there are some details as regards the proposed sub-TLV that
> should be revised.
>
>
>
> 1)Rather than use a fixed 16 bit field for the flags I suggest you utiliz=
e
> the encoding style introduced in RFC 7794 (see Section 2.1) which allows
> for a variable length flags field. This addresses two issues:
>
>
>
>    o You need never worry that the size of the flags field will be too
> small for future extensions
>
>    o It minimizes the number of bytes required to be sent
>
>
>
> The latter point is something IS-IS has always been more conservative
> about than OSPF because of the fixed size of an LSP set which can be
> advertised by a single router.
>
>
>
> 2)In the IANA considerations you have limited the sub-TLV to being used i=
n
> TLV 22 only, but there is no reason to do so. This does not allow MT to b=
e
> supported and it needlessly prevents use of the sub-TLV by the RFC 5311
> extensions (however unpopular those may be). I can understand why the
> sub-TLV may not be useful in TLV 141, therefore I suggest the table in
> Section 7.5 be revised to be:
>
>
>
>
>
>     | Type | Description | 22 | 23 | 141 | 222 | 223 | Reference
> |
>
>    +------+-------------+----+----+-----+-----+-----+---------------+
>
>   | TBA3 |    RTM       | y  | y  | n   | y   | y   | This document
> |
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>
>
>
> i.e. "y" for all but TLV 141 (in case the ASCII art doesn't translate wel=
l
> in your mailer).
>
>
>
> You should also remove the reference to RFC 5305 in Section 4.5 as it is
> too limiting. Simply referencing the IANA registry http://www.iana.org/
> assignments/isis-tlv-codepoints/isis-tlv-codepoints.xhtml#isis-tlv-
> codepoints-22-23-141-222-223 should be sufficient. All necessary
> references can be found there.
>
>
>
> 3)An editorial correction:
>
>
>
> Introduction 3rd paragraph:
>
>
>
> s/ Althugh/ Although
>
>
>
>    Les
>
>
>
> > -----Original Message-----
>
> > From: OSPF [mailto:ospf-bounces@ietf.org] On Behalf Of Loa Andersson
>
> > Sent: Monday, January 30, 2017 8:02 AM
>
> > To: mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg
>
> > Cc: isis-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org=
;
> TEAS
>
> > WG Chairs; mpls-chairs@ietf.org; ospf-chairs@ietf.org
>
> > Subject: [OSPF] Working group last call on draft-ietf-mpls-residence-ti=
me
>
> >
>
> > Working Groups,
>
> >
>
> > This is to initiate a two week working group last call in four working
> groups on
>
> > draft-ietf-mpls-residence-time-13.
>
> >
>
> > The MPLS working group has done an earlier working group last call and =
a
>
> > request for publication has been made.
>
> >
>
> > The changes to the document were such that we decided to do a new
>
> > working group last call and extend it to MPLS, TEAS, OSPF and IS-IS.
>
> >
>
> > There are three major changes between the version of the document for
>
> > which publication was requested are:
>
> >
>
> > (1) that section 7 " One-step Clock and Two-step Clock Modes" has been
>
> >      moved up to become section 2.1.
>
> > (2) that a sub-TLV for TLV 22 instead of TLV 251 is used to RTM
>
> >      Capability when IS-IS used advertise RTM capabilities
>
> > (3) BGP-LS has been added as a RTM capability advertisement method
>
> >
>
> > A side-by-side diff between version -12 and -13 is available at:
>
> > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-mpls-residence-time-13
>
> >
>
> > Please send your comments to the mpls wg mailing list (mpls@ietf.org),
> if
>
> > you are not subscribed to the mpls wg list, send to "your own"
>
> > working group mailing list, and we'll make sure they are posted to the
> MPLS
>
> > wg list.
>
> >
>
> > There were one IPR disclosure against this document.
>
> >
>
> > All the authors and contributors have stated on the working group
> mailing list
>
> > that they are not aware of any other IPRs that relates to this document=
.
>
> >
>
> > This working group last call ends February 13, 2017.
>
> >
>
> >
>
> > /Loa
>
> > MPLS wg co-chairs
>
> > --
>
> >
>
> >
>
> > Loa Andersson                        email: loa@mail01.huawei.com
>
> > Senior MPLS Expert                          loa@pi.nu
>
> > Huawei Technologies (consultant)     phone: +46 739 81 21 64
>
> >
>
> > _______________________________________________
>
> > OSPF mailing list
>
> > OSPF@ietf.org
>
> > https://www.ietf.org/mailman/listinfo/ospf
>
>
> _______________________________________________
> OSPF mailing list
> OSPF@ietf.org
> https://www.ietf.org/mailman/listinfo/ospf
>
>
>
>
>

--001a1134fa54a49d870547661a5d
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Les,<div>thank you for your patience and apologies for =
missing it.</div><div>Diff and the update been attached.</div><div><br></di=
v><div>Regards,</div><div>Greg</div></div><div class=3D"gmail_extra"><br><d=
iv class=3D"gmail_quote">On Tue, Jan 31, 2017 at 5:07 AM, Les Ginsberg (gin=
sberg) <span dir=3D"ltr">&lt;<a href=3D"mailto:ginsberg@cisco.com" target=
=3D"_blank">ginsberg@cisco.com</a>&gt;</span> wrote:<br><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_7832089522784764482WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Greg =E2=80=93<u></u><u><=
/u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Almost=E2=80=A6<u></u><u>=
</u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Please change the title o=
f Section 7.5 to =E2=80=9CIS-IS RTM Capability sub-TLV=E2=80=9D.<u></u><u><=
/u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Please change the title o=
f Table 5 to =E2=80=9CIS-IS RTM Capability sub-TLV Registry Description=E2=
=80=9D.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">The common point being si=
nce this is not exclusively for TLV 22 we do not want to say =E2=80=9Cfor T=
LV 22=E2=80=9D.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Thanx.<u></u><u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 Les<u>=
</u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Greg Mir=
sky [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">greg=
imirsky@gmail.com</a>]
<br>
<b>Sent:</b> Monday, January 30, 2017 11:43 PM</span></p><div><div class=3D=
"h5"><br>
<b>To:</b> Les Ginsberg (ginsberg)<br>
<b>Cc:</b> Loa Andersson; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>; TEAS WG; <a href=3D"mailto:ospf@ietf.org" target=3D"_b=
lank">ospf@ietf.org</a>; Isis-wg; <a href=3D"mailto:ospf-chairs@ietf.org" t=
arget=3D"_blank">ospf-chairs@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpl=
s-residence-time@tools.ietf.org" target=3D"_blank">draft-ietf-mpls-residenc=
e-<wbr>time@tools.ietf.org</a>; TEAS WG Chairs; <a href=3D"mailto:isis-chai=
rs@ietf.org" target=3D"_blank">isis-chairs@ietf.org</a>; <a href=3D"mailto:=
mpls-chairs@ietf.org" target=3D"_blank">mpls-chairs@ietf.org</a><br>
<b>Subject:</b> Re: [OSPF] Working group last call on draft-ietf-mpls-resid=
ence-time<u></u><u></u></div></div><p></p>
</div>
</div><div><div class=3D"h5">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">Hi Les,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">many thanks for your the most detailed suggestions. =
Hope I&#39;ve it right.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Regards,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Greg<u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Mon, Jan 30, 2017 at 11:04 PM, Les Ginsberg (gins=
berg) &lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@=
cisco.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Greg =E2=80=93</span><u><=
/u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Thanx for the quick turna=
round.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Section 4.5 (revised text=
)</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 The capabili=
ty to support RTM on a particular link (interface) is</span><u></u><u></u><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 advertised i=
n a new sub-TLV which may be included in TLVs advertising</span><u></u><u><=
/u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 Intemediate =
System (IS) Reachability on a specific link (TLVs 22, 23, 222, and 223).</s=
pan><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 The format f=
or the RTM Capabilities sub-TLV is presented in Figure 5</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0=C2=A0 =
0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 1=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 2<=
/span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0=C2=A0 =
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 ...</span><u></u><u></u=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 +-+-+-=
+-+-+-+-+-+-+-+-+-+-+-+-<wbr>+-+-+-+-+-+-+-+-+-+-+-+...</span><u></u><u></u=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 |=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0 Type=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=
=A0=C2=A0 Length=C2=A0=C2=A0=C2=A0 | RTM |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 ...</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 +-+-+-=
+-+-+-+-+-+-+-+-+-+-+-+-<wbr>+-+-+-+-+-+-+-+-+-+-+-+...</span><u></u><u></u=
></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 Figure 5: RT=
M Capability sub-TLV</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=E2=80=A6 (Remainder unch=
anged)</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Section 7.5 (revised text=
)</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">7.5.=C2=A0 IS-IS RTM Capa=
bility sub-TLV
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 IANA is requ=
ested to assign a new Type for RTM capability sub-TLV</span><u></u><u></u><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 from the Sub=
-TLVs for TLVs 22, 23, 141, 222, and 223 registry as</span><u></u><u></u></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 follows:</sp=
an><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 +-----=
-+-------------+----+---<wbr>-+-----+-----+-----+----------<wbr>-----+</spa=
n><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 | Type=
 | Description | 22 | 23 | 141 | 222 | 223 | Reference=C2=A0=C2=A0=C2=A0=C2=
=A0 |</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 +-----=
-+-------------+----+---<wbr>-+-----+-----+-----+----------<wbr>-----+</spa=
n><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 | TBA3=
 |=C2=A0=C2=A0=C2=A0=C2=A0 RTM =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0| y=C2=A0 | y=
=C2=A0 | n=C2=A0=C2=A0 | y=C2=A0=C2=A0 | y=C2=A0=C2=A0 | This document |</s=
pan><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 |=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | Capability |=C2=
=A0 =C2=A0=C2=A0=C2=A0=C2=A0|=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0=C2=A0
 |</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 +-----=
-+-------------+----+---<wbr>-+-----+-----+-----+----------<wbr>-----+</spa=
n><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Table 5: IS-IS RTM Capabil=
ity sub-TLV Registry Description</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Thanx.</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0=C2=A0 Les</s=
pan><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0</span><u></u><u></=
u></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Greg Mir=
sky [mailto:<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_blank">greg=
imirsky@gmail.com</a>]
<br>
<b>Sent:</b> Monday, January 30, 2017 10:36 PM<br>
<b>To:</b> Les Ginsberg (ginsberg)<br>
<b>Cc:</b> Loa Andersson; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>; TEAS WG;
<a href=3D"mailto:ospf@ietf.org" target=3D"_blank">ospf@ietf.org</a>; Isis-=
wg; <a href=3D"mailto:ospf-chairs@ietf.org" target=3D"_blank">
ospf-chairs@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time@=
tools.ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-<wbr>time@tools.ietf.org</a>; TEAS WG Chairs; <a =
href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; <a href=3D"mailto:mpls-chairs@ietf.org" target=3D=
"_blank">mpls-chairs@ietf.org</a><br>
<b>Subject:</b> Re: [OSPF] Working group last call on draft-ietf-mpls-resid=
ence-time</span><u></u><u></u></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">Hi Les,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">attached are diff and the updated version -14. Would=
 be much obliged to hear from you if the updates are according to your sugg=
estions and address your comments.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Kind regards,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Greg<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">On Mon, Jan 30, 2017 at 1:11 PM, Les Ginsberg (ginsb=
erg) &lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@c=
isco.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">Loa -<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">The change for IS-IS encoding to utilize a sub-TLV of TLV 22 et=
 al to advertise RTM capability is a better solution than the previous prop=
osal and this has my support.<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">However, there are some details as regards the proposed sub-TLV=
 that should be revised.<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">1)Rather than use a fixed 16 bit field for the flags I suggest =
you utilize the encoding style introduced in RFC 7794 (see Section 2.1) whi=
ch allows for a variable length flags field. This addresses
 two issues:<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0=C2=A0 o You need never worry that the size of the flags =
field will be too small for future extensions<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0=C2=A0 o It minimizes the number of bytes required to be =
sent<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">The latter point is something IS-IS has always been more conser=
vative about than OSPF because of the fixed size of an LSP set which can be=
 advertised by a single router.<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">2)In the IANA considerations you have limited the sub-TLV to be=
ing used in TLV 22 only, but there is no reason to do so. This does not all=
ow MT to be supported and it needlessly prevents use of
 the sub-TLV by the RFC 5311 extensions (however unpopular those may be). I=
 can understand why the sub-TLV may not be useful in TLV 141, therefore I s=
uggest the table in Section 7.5 be revised to be:<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0=C2=A0=C2=A0 | Type | Description | 22 | 23 | 141 | 222 |=
 223 | Reference=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0=C2=A0=C2=A0+------+-------------+----+<wbr>----+-----+--=
---+-----+-------<wbr>--------+=C2=A0=C2=A0=C2=A0=C2=A0
<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0=C2=A0| TBA3 |=C2=A0=C2=A0=C2=A0 RTM=C2=A0=C2=A0=C2=A0=C2=
=A0 =C2=A0=C2=A0| y=C2=A0 | y=C2=A0 | n=C2=A0=C2=A0 | y=C2=A0=C2=A0 | y=C2=
=A0=C2=A0 | This document |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0=C2=A0=C2=A0 +------+-------------+----+---<wbr>-+-----+-=
----+-----+----------<wbr>-----+=C2=A0=C2=A0=C2=A0=C2=A0
<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">i.e. &quot;y&quot; for all but TLV 141 (in case the ASCII art d=
oesn&#39;t translate well in your mailer).<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">You should also remove the reference to RFC 5305 in =
Section 4.5 as it is too limiting. Simply referencing the IANA registry
<a href=3D"http://www.iana.org/assignments/isis-tlv-codepoints/isis-tlv-cod=
epoints.xhtml%23isis-tlv-codepoints-22-23-141-222-223" target=3D"_blank">
http://www.iana.org/<wbr>assignments/isis-tlv-<wbr>codepoints/isis-tlv-<wbr=
>codepoints.xhtml#isis-tlv-<wbr>codepoints-22-23-141-222-223</a> should be =
sufficient. All necessary references can be found there.<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">3)An editorial correction:<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">Introduction 3<sup>rd</sup> paragraph:<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">s/ Althugh/ Although<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0=C2=A0 Les<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">=C2=A0<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; -----Original Message-----<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; From: OSPF [mailto:<a href=3D"mailto:ospf-bounces@ietf.org=
" target=3D"_blank">ospf-bounces@ietf.org</a>] On Behalf Of Loa Andersson<u=
></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; Sent: Monday, January 30, 2017 8:02 AM<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; To: <a href=3D"mailto:mpls@ietf.org" target=3D"_blank">
mpls@ietf.org</a>; TEAS WG; <a href=3D"mailto:ospf@ietf.org" target=3D"_bla=
nk">ospf@ietf.org</a>; Isis-wg<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; Cc: <a href=3D"mailto:isis-chairs@ietf.org" target=3D"_bla=
nk">
isis-chairs@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time@=
tools.ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-<wbr>time@tools.ietf.org</a>; TEAS<u></u><u></u><=
/p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; WG Chairs; <a href=3D"mailto:mpls-chairs@ietf.org" target=
=3D"_blank">
mpls-chairs@ietf.org</a>; <a href=3D"mailto:ospf-chairs@ietf.org" target=3D=
"_blank">ospf-chairs@ietf.org</a><u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; Subject: [OSPF] Working group last call on draft-ietf-mpls=
-residence-time<u></u><u></u></p>
<div>
<div>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; Working Groups,<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; This is to initiate a two week working group last call in =
four working groups on<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; draft-ietf-mpls-residence-<wbr>time-13.<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; The MPLS working group has done an earlier working group l=
ast call and a<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; request for publication has been made.<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; The changes to the document were such that we decided to d=
o a new<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; working group last call and extend it to MPLS, TEAS, OSPF =
and IS-IS.<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; There are three major changes between the version of the d=
ocument for<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; which publication was requested are:<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; (1) that section 7 &quot; One-step Clock and Two-step Cloc=
k Modes&quot; has been<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0moved up to become section 2=
.1.<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; (2) that a sub-TLV for TLV 22 instead of TLV 251 is used t=
o RTM<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Capability when IS-IS used a=
dvertise RTM capabilities<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; (3) BGP-LS has been added as a RTM capability advertisemen=
t method<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; A side-by-side diff between version -12 and -13 is availab=
le at:<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-=
mpls-residence-time-13" target=3D"_blank">
<span style=3D"color:windowtext;text-decoration:none">https://www.ietf.org/=
rfcdiff?<wbr>url2=3Ddraft-ietf-mpls-<wbr>residence-time-13</span></a><u></u=
><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; Please send your comments to the mpls wg mailing list (<a =
href=3D"mailto:mpls@ietf.org" target=3D"_blank"><span style=3D"color:window=
text;text-decoration:none">mpls@ietf.org</span></a>), if<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; you are not subscribed to the mpls wg list, send to &quot;=
your own&quot;<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; working group mailing list, and we&#39;ll make sure they a=
re posted to the MPLS<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; wg list.<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; There were one IPR disclosure against this document.<u></u=
><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; All the authors and contributors have stated on the workin=
g group mailing list<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; that they are not aware of any other IPRs that relates to =
this document.<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; This working group last call ends February 13, 2017.<u></u=
><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; /Loa<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; MPLS wg co-chairs<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; --<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; Loa Andersson=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0<wbr>=C2=A0=C2=A0 email:
<a href=3D"mailto:loa@mail01.huawei.com" target=3D"_blank"><span style=3D"c=
olor:windowtext;text-decoration:none">loa@mail01.huawei.com</span></a><u></=
u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; Senior MPLS Expert=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0
<a href=3D"mailto:loa@pi.nu" target=3D"_blank"><span style=3D"color:windowt=
ext;text-decoration:none">loa@pi.nu</span></a><u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; Huawei Technologies (consultant)=C2=A0=C2=A0=C2=A0=C2=A0 p=
hone: +46 739 81 21 64<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; ______________________________<wbr>_________________<u></u=
><u></u></p>
</div>
</div>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; OSPF mailing list<u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <a href=3D"mailto:OSPF@ietf.org" target=3D"_blank">
<span style=3D"color:windowtext;text-decoration:none">OSPF@ietf.org</span><=
/a><u></u><u></u></p>
<p class=3D"m_7832089522784764482m8733016173006011846m2337760234444598969ms=
oplaintext">&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/ospf" tar=
get=3D"_blank">
<span style=3D"color:windowtext;text-decoration:none">https://www.ietf.org/=
mailman/<wbr>listinfo/ospf</span></a><u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
______________________________<wbr>_________________<br>
OSPF mailing list<br>
<a href=3D"mailto:OSPF@ietf.org" target=3D"_blank">OSPF@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/ospf" target=3D"_blank">ht=
tps://www.ietf.org/mailman/<wbr>listinfo/ospf</a><u></u><u></u></p>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div></div></div>
</div>
</div>

</blockquote></div><br></div>

--001a1134fa54a49d870547661a5d--

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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [OSPF] Working group last call on draft-ietf-mpls-residence-time
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Subject: Re: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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From: Uma Chunduri <uma.chunduri@huawei.com>
To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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Subject: Re: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Tue, 31 Jan 2017 12:51:59 -0800
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To: Uma Chunduri <uma.chunduri@huawei.com>
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Cc: "Les Ginsberg \(ginsberg\)" <ginsberg@cisco.com>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, Isis-wg <isis-wg-bounces@ietf.org>, "draft-ietf-mpls-residence-time@tools.ietf.org" <draft-ietf-mpls-residence-time@tools.ietf.org>, "mpls@ietf.org" <mpls@ietf.org>, TEAS WG Chairs <teas-chairs@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, TEAS WG <teas@ietf.org>, "ospf@ietf.org" <ospf@ietf.org>, "ospf-chairs@ietf.org" <ospf-chairs@ietf.org>
Subject: Re: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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Hi Uma,
great catch and astute observation, thank you!
I think that making RTM Capabilities space in IS-IS extendable beyond
remaining 13 bit-long space is prudent. But now, as you've pointed out,
need to reconcile formats. I'd prefer to take option 1, i.e. use variable
length Value field in RTM Capabilities sub-TLV for OSPFv2. Acee, would that
be acceptable?

Regards,
Greg

On Tue, Jan 31, 2017 at 10:22 AM, Uma Chunduri <uma.chunduri@huawei.com>
wrote:

> Had a quick look at this diff.
>
>
>
> This is about unifying the encoding parts in IGP to have a consistent vie=
w
> for BGP-LS encoding or keeping these separate and yet having a correct
> representation in BGP-LS for both IGPs.
>
>
>
> =3D=3D
>
> With variable length bit field for Section 4.5 and fixed 4 byte value (as
> indicated as MUST  for length) in section 4.3  - I saw a discrepancy  in
> section 4.6 (BGP-LS) which is referencing section 4.3.
>
>
>
> You have multiple options to fix this:
>
>
>
> 1.       Change section 4.3 to match section 4.5 (I am not sure why we
> have to have variable length for this bit field to start with in this cas=
e
> like rfc 7794=E2=80=A6but I won=E2=80=99t say much now)
>
> 2.       Change Section 4.6 to represent differences in encoding section
> 4.5 and 4.3 correctly.
>
> =E2=80=9CLength, RTM, and Reserved fields as defined in Section 4.3.=E2=
=80=9D
>
>    3. Lastly unify section 4.5 to 4.3  i.e., 4 byte value with 3 bits
> defined and 29 bits reserved.
>
> --
>
> Uma C.
>
>
>
> *From:* mpls [mailto:mpls-bounces@ietf.org] *On Behalf Of *Les Ginsberg
> (ginsberg)
> *Sent:* Tuesday, January 31, 2017 8:22 AM
> *To:* Greg Mirsky <gregimirsky@gmail.com>
> *Cc:* mpls@ietf.org; isis-chairs@ietf.org; Isis-wg <
> isis-wg-bounces@ietf.org>; draft-ietf-mpls-residence-time@tools.ietf.org;
> TEAS WG Chairs <teas-chairs@ietf.org>; mpls-chairs@ietf.org; TEAS WG <
> teas@ietf.org>; ospf@ietf.org; ospf-chairs@ietf.org
> *Subject:* Re: [mpls] [OSPF] Working group last call on
> draft-ietf-mpls-residence-time
>
>
>
> Greg =E2=80=93
>
>
>
> Looks good.
>
>
>
>    Les
>
>
>
> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com <gregimirsky@gmail.com>=
]
>
> *Sent:* Tuesday, January 31, 2017 8:06 AM
> *To:* Les Ginsberg (ginsberg)
> *Cc:* Loa Andersson; mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg;
> ospf-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org; TEAS
> WG Chairs; isis-chairs@ietf.org; mpls-chairs@ietf.org
> *Subject:* Re: [OSPF] Working group last call on
> draft-ietf-mpls-residence-time
>
>
>
> Hi Les,
>
> thank you for your patience and apologies for missing it.
>
> Diff and the update been attached.
>
>
>
> Regards,
>
> Greg
>
>
>
> On Tue, Jan 31, 2017 at 5:07 AM, Les Ginsberg (ginsberg) <
> ginsberg@cisco.com> wrote:
>
> Greg =E2=80=93
>
>
>
> Almost=E2=80=A6
>
>
>
> Please change the title of Section 7.5 to =E2=80=9CIS-IS RTM Capability s=
ub-TLV=E2=80=9D.
>
>
>
> Please change the title of Table 5 to =E2=80=9CIS-IS RTM Capability sub-T=
LV
> Registry Description=E2=80=9D.
>
>
>
> The common point being since this is not exclusively for TLV 22 we do not
> want to say =E2=80=9Cfor TLV 22=E2=80=9D.
>
> Thanx.
>
>
>
>     Les
>
>
>
>
>
> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com]
> *Sent:* Monday, January 30, 2017 11:43 PM
>
>
> *To:* Les Ginsberg (ginsberg)
> *Cc:* Loa Andersson; mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg;
> ospf-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org; TEAS
> WG Chairs; isis-chairs@ietf.org; mpls-chairs@ietf.org
> *Subject:* Re: [OSPF] Working group last call on
> draft-ietf-mpls-residence-time
>
>
>
> Hi Les,
>
> many thanks for your the most detailed suggestions. Hope I've it right.
>
>
>
> Regards,
>
> Greg
>
>
>
> On Mon, Jan 30, 2017 at 11:04 PM, Les Ginsberg (ginsberg) <
> ginsberg@cisco.com> wrote:
>
> Greg =E2=80=93
>
>
>
> Thanx for the quick turnaround.
>
>
>
> Section 4.5 (revised text)
>
>
>
>    The capability to support RTM on a particular link (interface) is
>
>    advertised in a new sub-TLV which may be included in TLVs advertising
>
>    Intemediate System (IS) Reachability on a specific link (TLVs 22, 23,
> 222, and 223).
>
>
>
>    The format for the RTM Capabilities sub-TLV is presented in Figure 5
>
>
>
>      0                   1                   2
>
>      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 ...
>
>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...
>
>     |      Type     |     Length    | RTM |              ...
>
>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...
>
>
>
>    Figure 5: RTM Capability sub-TLV
>
>
>
> =E2=80=A6 (Remainder unchanged)
>
>
>
> Section 7.5 (revised text)
>
>
>
> 7.5.  IS-IS RTM Capability sub-TLV
>
>
>
>    IANA is requested to assign a new Type for RTM capability sub-TLV
>
>    from the Sub-TLVs for TLVs 22, 23, 141, 222, and 223 registry as
>
>    follows:
>
>
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>     | Type | Description | 22 | 23 | 141 | 222 | 223 | Reference     |
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>     | TBA3 |     RTM      | y  | y  | n   | y   | y   | This document |
>
>     |           | Capability |      |     |      |       |
> |                                |
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>
>
>              Table 5: IS-IS RTM Capability sub-TLV Registry Description
>
>
>
>
>
> Thanx.
>
>
>
>     Les
>
>
>
> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com]
> *Sent:* Monday, January 30, 2017 10:36 PM
> *To:* Les Ginsberg (ginsberg)
> *Cc:* Loa Andersson; mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg;
> ospf-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org; TEAS
> WG Chairs; isis-chairs@ietf.org; mpls-chairs@ietf.org
> *Subject:* Re: [OSPF] Working group last call on
> draft-ietf-mpls-residence-time
>
>
>
> Hi Les,
>
> attached are diff and the updated version -14. Would be much obliged to
> hear from you if the updates are according to your suggestions and addres=
s
> your comments.
>
>
>
> Kind regards,
>
> Greg
>
>
>
>
>
> On Mon, Jan 30, 2017 at 1:11 PM, Les Ginsberg (ginsberg) <
> ginsberg@cisco.com> wrote:
>
> Loa -
>
>
>
> The change for IS-IS encoding to utilize a sub-TLV of TLV 22 et al to
> advertise RTM capability is a better solution than the previous proposal
> and this has my support.
>
> However, there are some details as regards the proposed sub-TLV that
> should be revised.
>
>
>
> 1)Rather than use a fixed 16 bit field for the flags I suggest you utiliz=
e
> the encoding style introduced in RFC 7794 (see Section 2.1) which allows
> for a variable length flags field. This addresses two issues:
>
>
>
>    o You need never worry that the size of the flags field will be too
> small for future extensions
>
>    o It minimizes the number of bytes required to be sent
>
>
>
> The latter point is something IS-IS has always been more conservative
> about than OSPF because of the fixed size of an LSP set which can be
> advertised by a single router.
>
>
>
> 2)In the IANA considerations you have limited the sub-TLV to being used i=
n
> TLV 22 only, but there is no reason to do so. This does not allow MT to b=
e
> supported and it needlessly prevents use of the sub-TLV by the RFC 5311
> extensions (however unpopular those may be). I can understand why the
> sub-TLV may not be useful in TLV 141, therefore I suggest the table in
> Section 7.5 be revised to be:
>
>
>
>
>
>     | Type | Description | 22 | 23 | 141 | 222 | 223 | Reference
> |
>
>    +------+-------------+----+----+-----+-----+-----+---------------+
>
>   | TBA3 |    RTM       | y  | y  | n   | y   | y   | This document
> |
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>
>
>
> i.e. "y" for all but TLV 141 (in case the ASCII art doesn't translate wel=
l
> in your mailer).
>
>
>
> You should also remove the reference to RFC 5305 in Section 4.5 as it is
> too limiting. Simply referencing the IANA registry http://www.iana.org/
> assignments/isis-tlv-codepoints/isis-tlv-codepoints.xhtml#isis-tlv-
> codepoints-22-23-141-222-223 should be sufficient. All necessary
> references can be found there.
>
>
>
> 3)An editorial correction:
>
>
>
> Introduction 3rd paragraph:
>
>
>
> s/ Althugh/ Although
>
>
>
>    Les
>
>
>
> > -----Original Message-----
>
> > From: OSPF [mailto:ospf-bounces@ietf.org] On Behalf Of Loa Andersson
>
> > Sent: Monday, January 30, 2017 8:02 AM
>
> > To: mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg
>
> > Cc: isis-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org=
;
> TEAS
>
> > WG Chairs; mpls-chairs@ietf.org; ospf-chairs@ietf.org
>
> > Subject: [OSPF] Working group last call on draft-ietf-mpls-residence-ti=
me
>
> >
>
> > Working Groups,
>
> >
>
> > This is to initiate a two week working group last call in four working
> groups on
>
> > draft-ietf-mpls-residence-time-13.
>
> >
>
> > The MPLS working group has done an earlier working group last call and =
a
>
> > request for publication has been made.
>
> >
>
> > The changes to the document were such that we decided to do a new
>
> > working group last call and extend it to MPLS, TEAS, OSPF and IS-IS.
>
> >
>
> > There are three major changes between the version of the document for
>
> > which publication was requested are:
>
> >
>
> > (1) that section 7 " One-step Clock and Two-step Clock Modes" has been
>
> >      moved up to become section 2.1.
>
> > (2) that a sub-TLV for TLV 22 instead of TLV 251 is used to RTM
>
> >      Capability when IS-IS used advertise RTM capabilities
>
> > (3) BGP-LS has been added as a RTM capability advertisement method
>
> >
>
> > A side-by-side diff between version -12 and -13 is available at:
>
> > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-mpls-residence-time-13
>
> >
>
> > Please send your comments to the mpls wg mailing list (mpls@ietf.org),
> if
>
> > you are not subscribed to the mpls wg list, send to "your own"
>
> > working group mailing list, and we'll make sure they are posted to the
> MPLS
>
> > wg list.
>
> >
>
> > There were one IPR disclosure against this document.
>
> >
>
> > All the authors and contributors have stated on the working group
> mailing list
>
> > that they are not aware of any other IPRs that relates to this document=
.
>
> >
>
> > This working group last call ends February 13, 2017.
>
> >
>
> >
>
> > /Loa
>
> > MPLS wg co-chairs
>
> > --
>
> >
>
> >
>
> > Loa Andersson                        email: loa@mail01.huawei.com
>
> > Senior MPLS Expert                          loa@pi.nu
>
> > Huawei Technologies (consultant)     phone: +46 739 81 21 64
>
> >
>
> > _______________________________________________
>
> > OSPF mailing list
>
> > OSPF@ietf.org
>
> > https://www.ietf.org/mailman/listinfo/ospf
>
>
> _______________________________________________
> OSPF mailing list
> OSPF@ietf.org
> https://www.ietf.org/mailman/listinfo/ospf
>
>
>
>
>
>
>

--001a113ef06a7ae53005476a1abd
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Uma,<div>great catch and astute observation, thank you!=
</div><div>I think that making RTM Capabilities space in IS-IS extendable b=
eyond remaining 13 bit-long space is prudent. But now, as you&#39;ve pointe=
d out, need to reconcile formats. I&#39;d prefer to take option 1, i.e. use=
 variable length Value field in RTM Capabilities sub-TLV for OSPFv2. Acee, =
would that be acceptable?</div><div><br></div><div>Regards,</div><div>Greg<=
/div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Tue=
, Jan 31, 2017 at 10:22 AM, Uma Chunduri <span dir=3D"ltr">&lt;<a href=3D"m=
ailto:uma.chunduri@huawei.com" target=3D"_blank">uma.chunduri@huawei.com</a=
>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 =
0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_284838908574830251WordSection1">
<p class=3D"MsoNormal"><a name=3D"m_284838908574830251__MailEndCompose"><sp=
an style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;col=
or:#1f497d">Had a quick look at this diff.<u></u><u></u></span></a></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">This is about unifying the encoding p=
arts in IGP to have a consistent view for BGP-LS encoding or keeping these =
separate and yet having a correct representation
 in BGP-LS for both IGPs.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=3D=3D<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">With variable length bit field for Se=
ction 4.5 and fixed 4 byte value (as indicated as MUST =C2=A0for length) in=
 section 4.3 =C2=A0- I saw a discrepancy =C2=A0in section 4.6
 (BGP-LS) which is referencing section 4.3.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">You have multiple options to fix this=
:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"m_284838908574830251MsoListParagraph"><u></u><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><sp=
an>1.<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif;color:#1f497d">Change section 4.3 to match sect=
ion 4.5 (I am not sure why we have to have variable length for this bit fie=
ld to start with in this case like rfc 7794=E2=80=A6but
 I won=E2=80=99t say much now)<u></u><u></u></span></p>
<p class=3D"m_284838908574830251MsoListParagraph"><u></u><span style=3D"fon=
t-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><sp=
an>2.<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif;color:#1f497d">Change Section 4.6 to represent =
differences in encoding section 4.5 and 4.3 correctly.<u></u><u></u></span>=
</p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;text-indent:.5in;text-auto=
space:none">
<span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;=
color:#1f497d">=E2=80=9C</span><span style=3D"font-size:10.0pt;font-family:=
&quot;Lucida Console&quot;">Length, RTM, and Reserved fields as defined in =
Section 4.3.=E2=80=9D<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:10.0pt;font-family:&quot;Lucida Console&quot;">=C2=A0=C2=A0 3.
</span><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans=
-serif;color:#1f497d">Lastly unify section 4.5 to 4.3 =C2=A0i.e., 4 byte va=
lue with 3 bits defined and 29 bits reserved.</span><span style=3D"font-siz=
e:10.0pt;font-family:&quot;Lucida Console&quot;"><u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">--</span><span style=3D"font-size:11.=
0pt;font-family:&quot;Freestyle Script&quot;;color:#1f497d"><u></u><u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Uma C.</span><span style=3D"font-size=
:11.0pt;font-family:&quot;Brush Script MT&quot;;color:#1f497d"><u></u><u></=
u></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> mpls [mailto:<a href=3D"mailto=
:mpls-bounces@ietf.org" target=3D"_blank">mpls-bounces@ietf.org</a>]
<b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
<b>Sent:</b> Tuesday, January 31, 2017 8:22 AM<br>
<b>To:</b> Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=
=3D"_blank">gregimirsky@gmail.com</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ietf.org=
</a>; <a href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">isis-chairs=
@ietf.org</a>; Isis-wg &lt;<a href=3D"mailto:isis-wg-bounces@ietf.org" targ=
et=3D"_blank">isis-wg-bounces@ietf.org</a>&gt;; <a href=3D"mailto:draft-iet=
f-mpls-residence-time@tools.ietf.org" target=3D"_blank">draft-ietf-mpls-res=
idence-<wbr>time@tools.ietf.org</a>; TEAS WG Chairs &lt;<a href=3D"mailto:t=
eas-chairs@ietf.org" target=3D"_blank">teas-chairs@ietf.org</a>&gt;; <a hre=
f=3D"mailto:mpls-chairs@ietf.org" target=3D"_blank">mpls-chairs@ietf.org</a=
>; TEAS WG &lt;<a href=3D"mailto:teas@ietf.org" target=3D"_blank">teas@ietf=
.org</a>&gt;; <a href=3D"mailto:ospf@ietf.org" target=3D"_blank">ospf@ietf.=
org</a>; <a href=3D"mailto:ospf-chairs@ietf.org" target=3D"_blank">ospf-cha=
irs@ietf.org</a><br>
<b>Subject:</b> Re: [mpls] [OSPF] Working group last call on draft-ietf-mpl=
s-residence-time<u></u><u></u></span></p>
</div>
</div><div><div class=3D"h5">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Greg =E2=80=93<u></u><u></u></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Looks good.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 Les<u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Greg Mirsky [<a href=3D"mailto:g=
regimirsky@gmail.com" target=3D"_blank">mailto:gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Tuesday, January 31, 2017 8:06 AM<br>
<b>To:</b> Les Ginsberg (ginsberg)<br>
<b>Cc:</b> Loa Andersson; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>; TEAS WG;
<a href=3D"mailto:ospf@ietf.org" target=3D"_blank">ospf@ietf.org</a>; Isis-=
wg; <a href=3D"mailto:ospf-chairs@ietf.org" target=3D"_blank">
ospf-chairs@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time@=
tools.ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-<wbr>time@tools.ietf.org</a>; TEAS WG Chairs; <a =
href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; <a href=3D"mailto:mpls-chairs@ietf.org" target=3D=
"_blank">mpls-chairs@ietf.org</a><br>
<b>Subject:</b> Re: [OSPF] Working group last call on draft-ietf-mpls-resid=
ence-time<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">Hi Les,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">thank you for your patience and apologies for missin=
g it.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Diff and the update been attached.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Regards,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Greg<u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Tue, Jan 31, 2017 at 5:07 AM, Les Ginsberg (ginsb=
erg) &lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@c=
isco.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Greg =E2=80=93</span><u></u><u></u></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Almost=E2=80=A6</span><u></u><u></u><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Please change the title of Section 7.=
5 to =E2=80=9CIS-IS RTM Capability sub-TLV=E2=80=9D.</span><u></u><u></u></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Please change the title of Table 5 to=
 =E2=80=9CIS-IS RTM Capability sub-TLV Registry Description=E2=80=9D.</span=
><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">The common point being since this is =
not exclusively for TLV 22 we do not want to say =E2=80=9Cfor TLV 22=E2=80=
=9D.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Thanx.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 Les</span><u></u><=
u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Greg Mirsky [mailto:<a href=3D"m=
ailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Monday, January 30, 2017 11:43 PM</span><u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><br>
<b>To:</b> Les Ginsberg (ginsberg)<br>
<b>Cc:</b> Loa Andersson; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>; TEAS WG;
<a href=3D"mailto:ospf@ietf.org" target=3D"_blank">ospf@ietf.org</a>; Isis-=
wg; <a href=3D"mailto:ospf-chairs@ietf.org" target=3D"_blank">
ospf-chairs@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time@=
tools.ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-<wbr>time@tools.ietf.org</a>; TEAS WG Chairs; <a =
href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; <a href=3D"mailto:mpls-chairs@ietf.org" target=3D=
"_blank">mpls-chairs@ietf.org</a><br>
<b>Subject:</b> Re: [OSPF] Working group last call on draft-ietf-mpls-resid=
ence-time<u></u><u></u></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">Hi Les,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">many thanks for your the most detailed suggestions. =
Hope I&#39;ve it right.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Regards,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Greg<u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">On Mon, Jan 30, 2017 at 11:04 PM, Les Ginsberg (gins=
berg) &lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@=
cisco.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Greg =E2=80=93</span><u></u><u></u></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Thanx for the quick turnaround.</span=
><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Section 4.5 (revised text)</span><u><=
/u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 The capability to suppor=
t RTM on a particular link (interface) is</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 advertised in a new sub-=
TLV which may be included in TLVs advertising</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 Intemediate System (IS) =
Reachability on a specific link (TLVs 22, 23, 222, and 223).</span><u></u><=
u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 The format for the RTM C=
apabilities sub-TLV is presented in Figure 5</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0=C2=A0 0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0 1=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 2</span><u></u=
><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0=C2=A0 0 1 2 3 4 5 =
6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 ...</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 +-+-+-+-+-+-+-+-+-=
+-+-+-+-+-+-<wbr>+-+-+-+-+-+-+-+-+-+-+-+...</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 Type=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0 Leng=
th=C2=A0=C2=A0=C2=A0 | RTM |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 ...</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 +-+-+-+-+-+-+-+-+-=
+-+-+-+-+-+-<wbr>+-+-+-+-+-+-+-+-+-+-+-+...</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 Figure 5: RTM Capability=
 sub-TLV</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=E2=80=A6 (Remainder unchanged)</span=
><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Section 7.5 (revised text)</span><u><=
/u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">7.5.=C2=A0 IS-IS RTM Capability sub-T=
LV
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 IANA is requested to ass=
ign a new Type for RTM capability sub-TLV</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 from the Sub-TLVs for TL=
Vs 22, 23, 141, 222, and 223 registry as</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 follows:</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 +------+----------=
---+----+---<wbr>-+-----+-----+-----+----------<wbr>-----+</span><u></u><u>=
</u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 | Type | Descripti=
on | 22 | 23 | 141 | 222 | 223 | Reference=C2=A0=C2=A0=C2=A0=C2=A0 |</span>=
<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 +------+----------=
---+----+---<wbr>-+-----+-----+-----+----------<wbr>-----+</span><u></u><u>=
</u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 | TBA3 |=C2=A0=C2=
=A0=C2=A0=C2=A0 RTM =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0| y=C2=A0 | y=C2=A0 | n=
=C2=A0=C2=A0 | y=C2=A0=C2=A0 | y=C2=A0=C2=A0 | This document |</span><u></u=
><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | Capability |=C2=A0 =C2=A0=
=C2=A0=C2=A0=C2=A0|=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0=C2=A0 |</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 +------+----------=
---+----+---<wbr>-+-----+-----+-----+----------<wbr>-----+</span><u></u><u>=
</u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Table 5: IS-IS RTM Capability sub-TLV =
Registry Description</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Thanx.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 Les</span><u></u><=
u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Greg Mirsky [mailto:<a href=3D"m=
ailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Monday, January 30, 2017 10:36 PM<br>
<b>To:</b> Les Ginsberg (ginsberg)<br>
<b>Cc:</b> Loa Andersson; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>; TEAS WG;
<a href=3D"mailto:ospf@ietf.org" target=3D"_blank">ospf@ietf.org</a>; Isis-=
wg; <a href=3D"mailto:ospf-chairs@ietf.org" target=3D"_blank">
ospf-chairs@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time@=
tools.ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-<wbr>time@tools.ietf.org</a>; TEAS WG Chairs; <a =
href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; <a href=3D"mailto:mpls-chairs@ietf.org" target=3D=
"_blank">mpls-chairs@ietf.org</a><br>
<b>Subject:</b> Re: [OSPF] Working group last call on draft-ietf-mpls-resid=
ence-time</span><u></u><u></u></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">Hi Les,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">attached are diff and the updated version -14. Would=
 be much obliged to hear from you if the updates are according to your sugg=
estions and address your comments.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Kind regards,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Greg<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">On Mon, Jan 30, 2017 at 1:11 PM, Les Ginsberg (ginsb=
erg) &lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@c=
isco.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
Loa -<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
The change for IS-IS encoding to utilize a sub-TLV of TLV 22 et al to adver=
tise RTM capability is a better solution than the previous proposal and thi=
s has my support.<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
However, there are some details as regards the proposed sub-TLV that should=
 be revised.<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
1)Rather than use a fixed 16 bit field for the flags I suggest you utilize =
the encoding style introduced in RFC 7794 (see Section 2.1) which allows fo=
r a variable length flags field. This addresses two issues:<u></u><u></u></=
p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0=C2=A0 o You need never worry that the size of the flags field will b=
e too small for future extensions<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0=C2=A0 o It minimizes the number of bytes required to be sent<u></u><=
u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
The latter point is something IS-IS has always been more conservative about=
 than OSPF because of the fixed size of an LSP set which can be advertised =
by a single router.<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
2)In the IANA considerations you have limited the sub-TLV to being used in =
TLV 22 only, but there is no reason to do so. This does not allow MT to be =
supported and it needlessly prevents use of the sub-TLV by the RFC 5311 ext=
ensions (however unpopular those
 may be). I can understand why the sub-TLV may not be useful in TLV 141, th=
erefore I suggest the table in Section 7.5 be revised to be:<u></u><u></u><=
/p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0=C2=A0=C2=A0 | Type | Description | 22 | 23 | 141 | 222 | 223 | Refer=
ence=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0=C2=A0=C2=A0+------+-------------+----+<wbr>----+-----+-----+-----+--=
-----<wbr>--------+=C2=A0=C2=A0=C2=A0=C2=A0 <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0=C2=A0| TBA3 |=C2=A0=C2=A0=C2=A0 RTM=C2=A0=C2=A0=C2=A0=C2=A0 =C2=A0=
=C2=A0| y=C2=A0 | y=C2=A0 | n=C2=A0=C2=A0 | y=C2=A0=C2=A0 | y=C2=A0=C2=A0 |=
 This document |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 <u></u>
<u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0=C2=A0=C2=A0 +------+-------------+----+---<wbr>-+-----+-----+-----+-=
---------<wbr>-----+=C2=A0=C2=A0=C2=A0=C2=A0 <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
i.e. &quot;y&quot; for all but TLV 141 (in case the ASCII art doesn&#39;t t=
ranslate well in your mailer).<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">You should also remove the reference to RFC 5305 in =
Section 4.5 as it is too limiting. Simply referencing the IANA registry
<a href=3D"http://www.iana.org/assignments/isis-tlv-codepoints/isis-tlv-cod=
epoints.xhtml%23isis-tlv-codepoints-22-23-141-222-223" target=3D"_blank">
http://www.iana.org/<wbr>assignments/isis-tlv-<wbr>codepoints/isis-tlv-<wbr=
>codepoints.xhtml#isis-tlv-<wbr>codepoints-22-23-141-222-223</a> should be =
sufficient. All necessary references can be found there.<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
3)An editorial correction:<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
Introduction 3<sup>rd</sup> paragraph:<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
s/ Althugh/ Although<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0=C2=A0 Les<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; -----Original Message-----<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; From: OSPF [mailto:<a href=3D"mailto:ospf-bounces@ietf.org" target=3D"=
_blank">ospf-bounces@ietf.org</a>] On Behalf Of Loa Andersson<u></u><u></u>=
</p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; Sent: Monday, January 30, 2017 8:02 AM<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; To: <a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ietf.org</=
a>; TEAS WG; <a href=3D"mailto:ospf@ietf.org" target=3D"_blank">
ospf@ietf.org</a>; Isis-wg<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; Cc: <a href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">isis-cha=
irs@ietf.org</a>;
<a href=3D"mailto:draft-ietf-mpls-residence-time@tools.ietf.org" target=3D"=
_blank">draft-ietf-mpls-residence-<wbr>time@tools.ietf.org</a>; TEAS<u></u>=
<u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; WG Chairs; <a href=3D"mailto:mpls-chairs@ietf.org" target=3D"_blank">m=
pls-chairs@ietf.org</a>;
<a href=3D"mailto:ospf-chairs@ietf.org" target=3D"_blank">ospf-chairs@ietf.=
org</a><u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; Subject: [OSPF] Working group last call on draft-ietf-mpls-residence-t=
ime<u></u><u></u></p>
<div>
<div>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; Working Groups,<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; This is to initiate a two week working group last call in four working=
 groups on<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; draft-ietf-mpls-residence-<wbr>time-13.<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; The MPLS working group has done an earlier working group last call and=
 a<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; request for publication has been made.<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; The changes to the document were such that we decided to do a new<u></=
u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; working group last call and extend it to MPLS, TEAS, OSPF and IS-IS.<u=
></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; There are three major changes between the version of the document for<=
u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; which publication was requested are:<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; (1) that section 7 &quot; One-step Clock and Two-step Clock Modes&quot=
; has been<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0moved up to become section 2.1.<u></u><u=
></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; (2) that a sub-TLV for TLV 22 instead of TLV 251 is used to RTM<u></u>=
<u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Capability when IS-IS used advertise RTM=
 capabilities<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; (3) BGP-LS has been added as a RTM capability advertisement method<u><=
/u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; A side-by-side diff between version -12 and -13 is available at:<u></u=
><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-mpls-residen=
ce-time-13" target=3D"_blank">
<span style=3D"color:windowtext;text-decoration:none">https://www.ietf.org/=
rfcdiff?<wbr>url2=3Ddraft-ietf-mpls-<wbr>residence-time-13</span></a><u></u=
><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; Please send your comments to the mpls wg mailing list (<a href=3D"mail=
to:mpls@ietf.org" target=3D"_blank"><span style=3D"color:windowtext;text-de=
coration:none">mpls@ietf.org</span></a>), if<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; you are not subscribed to the mpls wg list, send to &quot;your own&quo=
t;<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; working group mailing list, and we&#39;ll make sure they are posted to=
 the MPLS<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; wg list.<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; There were one IPR disclosure against this document.<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; All the authors and contributors have stated on the working group mail=
ing list<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; that they are not aware of any other IPRs that relates to this documen=
t.<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; This working group last call ends February 13, 2017.<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; /Loa<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; MPLS wg co-chairs<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; --<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; Loa Andersson=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=
=C2=A0=C2=A0 email: <a href=3D"mailto:loa@mail01.huawei.com" target=3D"_bla=
nk">
<span style=3D"color:windowtext;text-decoration:none">loa@mail01.huawei.com=
</span></a><u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; Senior MPLS Expert=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0<wbr>=C2=A0 <a href=3D"mailto:loa@pi.nu" target=3D"_blank=
">
<span style=3D"color:windowtext;text-decoration:none">loa@pi.nu</span></a><=
u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; Huawei Technologies (consultant)=C2=A0=C2=A0=C2=A0=C2=A0 phone: +46 73=
9 81 21 64<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; ______________________________<wbr>_________________<u></u><u></u></p>
</div>
</div>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; OSPF mailing list<u></u><u></u></p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <a href=3D"mailto:OSPF@ietf.org" target=3D"_blank"><span style=3D"colo=
r:windowtext;text-decoration:none">OSPF@ietf.org</span></a><u></u><u></u></=
p>
<p class=3D"m_284838908574830251m7832089522784764482m8733016173006011846m23=
37760234444598969msoplaintext">
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/ospf" target=3D"_blan=
k"><span style=3D"color:windowtext;text-decoration:none">https://www.ietf.o=
rg/mailman/<wbr>listinfo/ospf</span></a><u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
______________________________<wbr>_________________<br>
OSPF mailing list<br>
<a href=3D"mailto:OSPF@ietf.org" target=3D"_blank">OSPF@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/ospf" target=3D"_blank">ht=
tps://www.ietf.org/mailman/<wbr>listinfo/ospf</a><u></u><u></u></p>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
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</div>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div></div></div>
</div>

</blockquote></div><br></div>

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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Greg Mirsky <gregimirsky@gmail.com>, Uma Chunduri <uma.chunduri@huawei.com>
Thread-Topic: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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Subject: Re: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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Hi Greg,=20

On 1/31/17, 12:51 PM, "Greg Mirsky" <gregimirsky@gmail.com> wrote:

>Hi Uma,
>great catch and astute observation, thank you!
>I think that making RTM Capabilities space in IS-IS extendable beyond
>remaining 13 bit-long space is prudent. But now, as you've pointed out,
>need to reconcile formats. I'd prefer to take option 1, i.e. use variable
>length Value field in RTM Capabilities sub-TLV for OSPFv2. Acee, would
>that
>be acceptable?

Sure - although I agree that a variable length bit field seems like
overkill. But by all means, let=B9s keep one encoding across all the
protocols.=20

Thanks,
Acee

>
>Regards,
>Greg
>
>On Tue, Jan 31, 2017 at 10:22 AM, Uma Chunduri <uma.chunduri@huawei.com>
>wrote:
>
>> Had a quick look at this diff.
>>
>>
>>
>> This is about unifying the encoding parts in IGP to have a consistent
>>view
>> for BGP-LS encoding or keeping these separate and yet having a correct
>> representation in BGP-LS for both IGPs.
>>
>>
>>
>> =3D=3D
>>
>> With variable length bit field for Section 4.5 and fixed 4 byte value
>>(as
>> indicated as MUST  for length) in section 4.3  - I saw a discrepancy  in
>> section 4.6 (BGP-LS) which is referencing section 4.3.
>>
>>
>>
>> You have multiple options to fix this:
>>
>>
>>
>> 1.       Change section 4.3 to match section 4.5 (I am not sure why we
>> have to have variable length for this bit field to start with in this
>>case
>> like rfc 7794=8Abut I won=B9t say much now)
>>
>> 2.       Change Section 4.6 to represent differences in encoding section
>> 4.5 and 4.3 correctly.
>>
>> =B3Length, RTM, and Reserved fields as defined in Section 4.3.=B2
>>
>>    3. Lastly unify section 4.5 to 4.3  i.e., 4 byte value with 3 bits
>> defined and 29 bits reserved.
>>
>> --
>>
>> Uma C.
>>
>>
>>
>> *From:* mpls [mailto:mpls-bounces@ietf.org] *On Behalf Of *Les Ginsberg
>> (ginsberg)
>> *Sent:* Tuesday, January 31, 2017 8:22 AM
>> *To:* Greg Mirsky <gregimirsky@gmail.com>
>> *Cc:* mpls@ietf.org; isis-chairs@ietf.org; Isis-wg <
>> isis-wg-bounces@ietf.org>;
>>draft-ietf-mpls-residence-time@tools.ietf.org;
>> TEAS WG Chairs <teas-chairs@ietf.org>; mpls-chairs@ietf.org; TEAS WG <
>> teas@ietf.org>; ospf@ietf.org; ospf-chairs@ietf.org
>> *Subject:* Re: [mpls] [OSPF] Working group last call on
>> draft-ietf-mpls-residence-time
>>
>>
>>
>> Greg =AD
>>
>>
>>
>> Looks good.
>>
>>
>>
>>    Les
>>
>>
>>
>> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com
>><gregimirsky@gmail.com>]
>>
>> *Sent:* Tuesday, January 31, 2017 8:06 AM
>> *To:* Les Ginsberg (ginsberg)
>> *Cc:* Loa Andersson; mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg;
>> ospf-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org;
>>TEAS
>> WG Chairs; isis-chairs@ietf.org; mpls-chairs@ietf.org
>> *Subject:* Re: [OSPF] Working group last call on
>> draft-ietf-mpls-residence-time
>>
>>
>>
>> Hi Les,
>>
>> thank you for your patience and apologies for missing it.
>>
>> Diff and the update been attached.
>>
>>
>>
>> Regards,
>>
>> Greg
>>
>>
>>
>> On Tue, Jan 31, 2017 at 5:07 AM, Les Ginsberg (ginsberg) <
>> ginsberg@cisco.com> wrote:
>>
>> Greg =AD
>>
>>
>>
>> Almost=8A
>>
>>
>>
>> Please change the title of Section 7.5 to =B3IS-IS RTM Capability
>>sub-TLV=B2.
>>
>>
>>
>> Please change the title of Table 5 to =B3IS-IS RTM Capability sub-TLV
>> Registry Description=B2.
>>
>>
>>
>> The common point being since this is not exclusively for TLV 22 we do
>>not
>> want to say =B3for TLV 22=B2.
>>
>> Thanx.
>>
>>
>>
>>     Les
>>
>>
>>
>>
>>
>> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com]
>> *Sent:* Monday, January 30, 2017 11:43 PM
>>
>>
>> *To:* Les Ginsberg (ginsberg)
>> *Cc:* Loa Andersson; mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg;
>> ospf-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org;
>>TEAS
>> WG Chairs; isis-chairs@ietf.org; mpls-chairs@ietf.org
>> *Subject:* Re: [OSPF] Working group last call on
>> draft-ietf-mpls-residence-time
>>
>>
>>
>> Hi Les,
>>
>> many thanks for your the most detailed suggestions. Hope I've it right.
>>
>>
>>
>> Regards,
>>
>> Greg
>>
>>
>>
>> On Mon, Jan 30, 2017 at 11:04 PM, Les Ginsberg (ginsberg) <
>> ginsberg@cisco.com> wrote:
>>
>> Greg =AD
>>
>>
>>
>> Thanx for the quick turnaround.
>>
>>
>>
>> Section 4.5 (revised text)
>>
>>
>>
>>    The capability to support RTM on a particular link (interface) is
>>
>>    advertised in a new sub-TLV which may be included in TLVs advertising
>>
>>    Intemediate System (IS) Reachability on a specific link (TLVs 22, 23,
>> 222, and 223).
>>
>>
>>
>>    The format for the RTM Capabilities sub-TLV is presented in Figure 5
>>
>>
>>
>>      0                   1                   2
>>
>>      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 ...
>>
>>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...
>>
>>     |      Type     |     Length    | RTM |              ...
>>
>>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...
>>
>>
>>
>>    Figure 5: RTM Capability sub-TLV
>>
>>
>>
>> =8A (Remainder unchanged)
>>
>>
>>
>> Section 7.5 (revised text)
>>
>>
>>
>> 7.5.  IS-IS RTM Capability sub-TLV
>>
>>
>>
>>    IANA is requested to assign a new Type for RTM capability sub-TLV
>>
>>    from the Sub-TLVs for TLVs 22, 23, 141, 222, and 223 registry as
>>
>>    follows:
>>
>>
>>
>>     +------+-------------+----+----+-----+-----+-----+---------------+
>>
>>     | Type | Description | 22 | 23 | 141 | 222 | 223 | Reference     |
>>
>>     +------+-------------+----+----+-----+-----+-----+---------------+
>>
>>     | TBA3 |     RTM      | y  | y  | n   | y   | y   | This document |
>>
>>     |           | Capability |      |     |      |       |
>> |                                |
>>
>>     +------+-------------+----+----+-----+-----+-----+---------------+
>>
>>
>>
>>              Table 5: IS-IS RTM Capability sub-TLV Registry Description
>>
>>
>>
>>
>>
>> Thanx.
>>
>>
>>
>>     Les
>>
>>
>>
>> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com]
>> *Sent:* Monday, January 30, 2017 10:36 PM
>> *To:* Les Ginsberg (ginsberg)
>> *Cc:* Loa Andersson; mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg;
>> ospf-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org;
>>TEAS
>> WG Chairs; isis-chairs@ietf.org; mpls-chairs@ietf.org
>> *Subject:* Re: [OSPF] Working group last call on
>> draft-ietf-mpls-residence-time
>>
>>
>>
>> Hi Les,
>>
>> attached are diff and the updated version -14. Would be much obliged to
>> hear from you if the updates are according to your suggestions and
>>address
>> your comments.
>>
>>
>>
>> Kind regards,
>>
>> Greg
>>
>>
>>
>>
>>
>> On Mon, Jan 30, 2017 at 1:11 PM, Les Ginsberg (ginsberg) <
>> ginsberg@cisco.com> wrote:
>>
>> Loa -
>>
>>
>>
>> The change for IS-IS encoding to utilize a sub-TLV of TLV 22 et al to
>> advertise RTM capability is a better solution than the previous proposal
>> and this has my support.
>>
>> However, there are some details as regards the proposed sub-TLV that
>> should be revised.
>>
>>
>>
>> 1)Rather than use a fixed 16 bit field for the flags I suggest you
>>utilize
>> the encoding style introduced in RFC 7794 (see Section 2.1) which allows
>> for a variable length flags field. This addresses two issues:
>>
>>
>>
>>    o You need never worry that the size of the flags field will be too
>> small for future extensions
>>
>>    o It minimizes the number of bytes required to be sent
>>
>>
>>
>> The latter point is something IS-IS has always been more conservative
>> about than OSPF because of the fixed size of an LSP set which can be
>> advertised by a single router.
>>
>>
>>
>> 2)In the IANA considerations you have limited the sub-TLV to being used
>>in
>> TLV 22 only, but there is no reason to do so. This does not allow MT to
>>be
>> supported and it needlessly prevents use of the sub-TLV by the RFC 5311
>> extensions (however unpopular those may be). I can understand why the
>> sub-TLV may not be useful in TLV 141, therefore I suggest the table in
>> Section 7.5 be revised to be:
>>
>>
>>
>>
>>
>>     | Type | Description | 22 | 23 | 141 | 222 | 223 | Reference
>> |
>>
>>    +------+-------------+----+----+-----+-----+-----+---------------+
>>
>>   | TBA3 |    RTM       | y  | y  | n   | y   | y   | This document
>> |
>>
>>     +------+-------------+----+----+-----+-----+-----+---------------+
>>
>>
>>
>>
>> i.e. "y" for all but TLV 141 (in case the ASCII art doesn't translate
>>well
>> in your mailer).
>>
>>
>>
>> You should also remove the reference to RFC 5305 in Section 4.5 as it is
>> too limiting. Simply referencing the IANA registry http://www.iana.org/
>> assignments/isis-tlv-codepoints/isis-tlv-codepoints.xhtml#isis-tlv-
>> codepoints-22-23-141-222-223 should be sufficient. All necessary
>> references can be found there.
>>
>>
>>
>> 3)An editorial correction:
>>
>>
>>
>> Introduction 3rd paragraph:
>>
>>
>>
>> s/ Althugh/ Although
>>
>>
>>
>>    Les
>>
>>
>>
>> > -----Original Message-----
>>
>> > From: OSPF [mailto:ospf-bounces@ietf.org] On Behalf Of Loa Andersson
>>
>> > Sent: Monday, January 30, 2017 8:02 AM
>>
>> > To: mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg
>>
>> > Cc: isis-chairs@ietf.org;
>>draft-ietf-mpls-residence-time@tools.ietf.org;
>> TEAS
>>
>> > WG Chairs; mpls-chairs@ietf.org; ospf-chairs@ietf.org
>>
>> > Subject: [OSPF] Working group last call on
>>draft-ietf-mpls-residence-time
>>
>> >
>>
>> > Working Groups,
>>
>> >
>>
>> > This is to initiate a two week working group last call in four working
>> groups on
>>
>> > draft-ietf-mpls-residence-time-13.
>>
>> >
>>
>> > The MPLS working group has done an earlier working group last call
>>and a
>>
>> > request for publication has been made.
>>
>> >
>>
>> > The changes to the document were such that we decided to do a new
>>
>> > working group last call and extend it to MPLS, TEAS, OSPF and IS-IS.
>>
>> >
>>
>> > There are three major changes between the version of the document for
>>
>> > which publication was requested are:
>>
>> >
>>
>> > (1) that section 7 " One-step Clock and Two-step Clock Modes" has been
>>
>> >      moved up to become section 2.1.
>>
>> > (2) that a sub-TLV for TLV 22 instead of TLV 251 is used to RTM
>>
>> >      Capability when IS-IS used advertise RTM capabilities
>>
>> > (3) BGP-LS has been added as a RTM capability advertisement method
>>
>> >
>>
>> > A side-by-side diff between version -12 and -13 is available at:
>>
>> > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-mpls-residence-time-13
>>
>> >
>>
>> > Please send your comments to the mpls wg mailing list (mpls@ietf.org),
>> if
>>
>> > you are not subscribed to the mpls wg list, send to "your own"
>>
>> > working group mailing list, and we'll make sure they are posted to the
>> MPLS
>>
>> > wg list.
>>
>> >
>>
>> > There were one IPR disclosure against this document.
>>
>> >
>>
>> > All the authors and contributors have stated on the working group
>> mailing list
>>
>> > that they are not aware of any other IPRs that relates to this
>>document


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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Tue, 31 Jan 2017 19:18:57 -0800
Message-ID: <CA+RyBmWBTxiA35uBG6icAaxkMkLp=Vr662oYdE8Qse8UqeHhwQ@mail.gmail.com>
To: Uma Chunduri <uma.chunduri@huawei.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/3D68GgoiUNkTV5sfd6cbfXWDPVI>
Cc: "Les Ginsberg \(ginsberg\)" <ginsberg@cisco.com>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, Isis-wg <isis-wg-bounces@ietf.org>, "draft-ietf-mpls-residence-time@tools.ietf.org" <draft-ietf-mpls-residence-time@tools.ietf.org>, "mpls@ietf.org" <mpls@ietf.org>, TEAS WG Chairs <teas-chairs@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, TEAS WG <teas@ietf.org>, "ospf@ietf.org" <ospf@ietf.org>, "ospf-chairs@ietf.org" <ospf-chairs@ietf.org>
Subject: Re: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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Hi Uma, Acee, Les, et. al,
attached please find diff and the updated version. I think I've got it
right by now.
Greatly appreciate your comments.

Regards,
Greg

On Tue, Jan 31, 2017 at 10:22 AM, Uma Chunduri <uma.chunduri@huawei.com>
wrote:

> Had a quick look at this diff.
>
>
>
> This is about unifying the encoding parts in IGP to have a consistent vie=
w
> for BGP-LS encoding or keeping these separate and yet having a correct
> representation in BGP-LS for both IGPs.
>
>
>
> =3D=3D
>
> With variable length bit field for Section 4.5 and fixed 4 byte value (as
> indicated as MUST  for length) in section 4.3  - I saw a discrepancy  in
> section 4.6 (BGP-LS) which is referencing section 4.3.
>
>
>
> You have multiple options to fix this:
>
>
>
> 1.       Change section 4.3 to match section 4.5 (I am not sure why we
> have to have variable length for this bit field to start with in this cas=
e
> like rfc 7794=E2=80=A6but I won=E2=80=99t say much now)
>
> 2.       Change Section 4.6 to represent differences in encoding section
> 4.5 and 4.3 correctly.
>
> =E2=80=9CLength, RTM, and Reserved fields as defined in Section 4.3.=E2=
=80=9D
>
>    3. Lastly unify section 4.5 to 4.3  i.e., 4 byte value with 3 bits
> defined and 29 bits reserved.
>
> --
>
> Uma C.
>
>
>
> *From:* mpls [mailto:mpls-bounces@ietf.org] *On Behalf Of *Les Ginsberg
> (ginsberg)
> *Sent:* Tuesday, January 31, 2017 8:22 AM
> *To:* Greg Mirsky <gregimirsky@gmail.com>
> *Cc:* mpls@ietf.org; isis-chairs@ietf.org; Isis-wg <
> isis-wg-bounces@ietf.org>; draft-ietf-mpls-residence-time@tools.ietf.org;
> TEAS WG Chairs <teas-chairs@ietf.org>; mpls-chairs@ietf.org; TEAS WG <
> teas@ietf.org>; ospf@ietf.org; ospf-chairs@ietf.org
> *Subject:* Re: [mpls] [OSPF] Working group last call on
> draft-ietf-mpls-residence-time
>
>
>
> Greg =E2=80=93
>
>
>
> Looks good.
>
>
>
>    Les
>
>
>
> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com <gregimirsky@gmail.com>=
]
>
> *Sent:* Tuesday, January 31, 2017 8:06 AM
> *To:* Les Ginsberg (ginsberg)
> *Cc:* Loa Andersson; mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg;
> ospf-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org; TEAS
> WG Chairs; isis-chairs@ietf.org; mpls-chairs@ietf.org
> *Subject:* Re: [OSPF] Working group last call on
> draft-ietf-mpls-residence-time
>
>
>
> Hi Les,
>
> thank you for your patience and apologies for missing it.
>
> Diff and the update been attached.
>
>
>
> Regards,
>
> Greg
>
>
>
> On Tue, Jan 31, 2017 at 5:07 AM, Les Ginsberg (ginsberg) <
> ginsberg@cisco.com> wrote:
>
> Greg =E2=80=93
>
>
>
> Almost=E2=80=A6
>
>
>
> Please change the title of Section 7.5 to =E2=80=9CIS-IS RTM Capability s=
ub-TLV=E2=80=9D.
>
>
>
> Please change the title of Table 5 to =E2=80=9CIS-IS RTM Capability sub-T=
LV
> Registry Description=E2=80=9D.
>
>
>
> The common point being since this is not exclusively for TLV 22 we do not
> want to say =E2=80=9Cfor TLV 22=E2=80=9D.
>
> Thanx.
>
>
>
>     Les
>
>
>
>
>
> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com]
> *Sent:* Monday, January 30, 2017 11:43 PM
>
>
> *To:* Les Ginsberg (ginsberg)
> *Cc:* Loa Andersson; mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg;
> ospf-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org; TEAS
> WG Chairs; isis-chairs@ietf.org; mpls-chairs@ietf.org
> *Subject:* Re: [OSPF] Working group last call on
> draft-ietf-mpls-residence-time
>
>
>
> Hi Les,
>
> many thanks for your the most detailed suggestions. Hope I've it right.
>
>
>
> Regards,
>
> Greg
>
>
>
> On Mon, Jan 30, 2017 at 11:04 PM, Les Ginsberg (ginsberg) <
> ginsberg@cisco.com> wrote:
>
> Greg =E2=80=93
>
>
>
> Thanx for the quick turnaround.
>
>
>
> Section 4.5 (revised text)
>
>
>
>    The capability to support RTM on a particular link (interface) is
>
>    advertised in a new sub-TLV which may be included in TLVs advertising
>
>    Intemediate System (IS) Reachability on a specific link (TLVs 22, 23,
> 222, and 223).
>
>
>
>    The format for the RTM Capabilities sub-TLV is presented in Figure 5
>
>
>
>      0                   1                   2
>
>      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 ...
>
>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...
>
>     |      Type     |     Length    | RTM |              ...
>
>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...
>
>
>
>    Figure 5: RTM Capability sub-TLV
>
>
>
> =E2=80=A6 (Remainder unchanged)
>
>
>
> Section 7.5 (revised text)
>
>
>
> 7.5.  IS-IS RTM Capability sub-TLV
>
>
>
>    IANA is requested to assign a new Type for RTM capability sub-TLV
>
>    from the Sub-TLVs for TLVs 22, 23, 141, 222, and 223 registry as
>
>    follows:
>
>
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>     | Type | Description | 22 | 23 | 141 | 222 | 223 | Reference     |
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>     | TBA3 |     RTM      | y  | y  | n   | y   | y   | This document |
>
>     |           | Capability |      |     |      |       |
> |                                |
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>
>
>              Table 5: IS-IS RTM Capability sub-TLV Registry Description
>
>
>
>
>
> Thanx.
>
>
>
>     Les
>
>
>
> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com]
> *Sent:* Monday, January 30, 2017 10:36 PM
> *To:* Les Ginsberg (ginsberg)
> *Cc:* Loa Andersson; mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg;
> ospf-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org; TEAS
> WG Chairs; isis-chairs@ietf.org; mpls-chairs@ietf.org
> *Subject:* Re: [OSPF] Working group last call on
> draft-ietf-mpls-residence-time
>
>
>
> Hi Les,
>
> attached are diff and the updated version -14. Would be much obliged to
> hear from you if the updates are according to your suggestions and addres=
s
> your comments.
>
>
>
> Kind regards,
>
> Greg
>
>
>
>
>
> On Mon, Jan 30, 2017 at 1:11 PM, Les Ginsberg (ginsberg) <
> ginsberg@cisco.com> wrote:
>
> Loa -
>
>
>
> The change for IS-IS encoding to utilize a sub-TLV of TLV 22 et al to
> advertise RTM capability is a better solution than the previous proposal
> and this has my support.
>
> However, there are some details as regards the proposed sub-TLV that
> should be revised.
>
>
>
> 1)Rather than use a fixed 16 bit field for the flags I suggest you utiliz=
e
> the encoding style introduced in RFC 7794 (see Section 2.1) which allows
> for a variable length flags field. This addresses two issues:
>
>
>
>    o You need never worry that the size of the flags field will be too
> small for future extensions
>
>    o It minimizes the number of bytes required to be sent
>
>
>
> The latter point is something IS-IS has always been more conservative
> about than OSPF because of the fixed size of an LSP set which can be
> advertised by a single router.
>
>
>
> 2)In the IANA considerations you have limited the sub-TLV to being used i=
n
> TLV 22 only, but there is no reason to do so. This does not allow MT to b=
e
> supported and it needlessly prevents use of the sub-TLV by the RFC 5311
> extensions (however unpopular those may be). I can understand why the
> sub-TLV may not be useful in TLV 141, therefore I suggest the table in
> Section 7.5 be revised to be:
>
>
>
>
>
>     | Type | Description | 22 | 23 | 141 | 222 | 223 | Reference
> |
>
>    +------+-------------+----+----+-----+-----+-----+---------------+
>
>   | TBA3 |    RTM       | y  | y  | n   | y   | y   | This document
> |
>
>     +------+-------------+----+----+-----+-----+-----+---------------+
>
>
>
>
> i.e. "y" for all but TLV 141 (in case the ASCII art doesn't translate wel=
l
> in your mailer).
>
>
>
> You should also remove the reference to RFC 5305 in Section 4.5 as it is
> too limiting. Simply referencing the IANA registry http://www.iana.org/
> assignments/isis-tlv-codepoints/isis-tlv-codepoints.xhtml#isis-tlv-
> codepoints-22-23-141-222-223 should be sufficient. All necessary
> references can be found there.
>
>
>
> 3)An editorial correction:
>
>
>
> Introduction 3rd paragraph:
>
>
>
> s/ Althugh/ Although
>
>
>
>    Les
>
>
>
> > -----Original Message-----
>
> > From: OSPF [mailto:ospf-bounces@ietf.org] On Behalf Of Loa Andersson
>
> > Sent: Monday, January 30, 2017 8:02 AM
>
> > To: mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg
>
> > Cc: isis-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org=
;
> TEAS
>
> > WG Chairs; mpls-chairs@ietf.org; ospf-chairs@ietf.org
>
> > Subject: [OSPF] Working group last call on draft-ietf-mpls-residence-ti=
me
>
> >
>
> > Working Groups,
>
> >
>
> > This is to initiate a two week working group last call in four working
> groups on
>
> > draft-ietf-mpls-residence-time-13.
>
> >
>
> > The MPLS working group has done an earlier working group last call and =
a
>
> > request for publication has been made.
>
> >
>
> > The changes to the document were such that we decided to do a new
>
> > working group last call and extend it to MPLS, TEAS, OSPF and IS-IS.
>
> >
>
> > There are three major changes between the version of the document for
>
> > which publication was requested are:
>
> >
>
> > (1) that section 7 " One-step Clock and Two-step Clock Modes" has been
>
> >      moved up to become section 2.1.
>
> > (2) that a sub-TLV for TLV 22 instead of TLV 251 is used to RTM
>
> >      Capability when IS-IS used advertise RTM capabilities
>
> > (3) BGP-LS has been added as a RTM capability advertisement method
>
> >
>
> > A side-by-side diff between version -12 and -13 is available at:
>
> > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-mpls-residence-time-13
>
> >
>
> > Please send your comments to the mpls wg mailing list (mpls@ietf.org),
> if
>
> > you are not subscribed to the mpls wg list, send to "your own"
>
> > working group mailing list, and we'll make sure they are posted to the
> MPLS
>
> > wg list.
>
> >
>
> > There were one IPR disclosure against this document.
>
> >
>
> > All the authors and contributors have stated on the working group
> mailing list
>
> > that they are not aware of any other IPRs that relates to this document=
.
>
> >
>
> > This working group last call ends February 13, 2017.
>
> >
>
> >
>
> > /Loa
>
> > MPLS wg co-chairs
>
> > --
>
> >
>
> >
>
> > Loa Andersson                        email: loa@mail01.huawei.com
>
> > Senior MPLS Expert                          loa@pi.nu
>
> > Huawei Technologies (consultant)     phone: +46 739 81 21 64
>
> >
>
> > _______________________________________________
>
> > OSPF mailing list
>
> > OSPF@ietf.org
>
> > https://www.ietf.org/mailman/listinfo/ospf
>
>
> _______________________________________________
> OSPF mailing list
> OSPF@ietf.org
> https://www.ietf.org/mailman/listinfo/ospf
>
>
>
>
>
>
>

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<div dir=3D"ltr">Hi Uma, Acee, Les, et. al,<div>attached please find diff a=
nd the updated version. I think I&#39;ve got it right by now.</div><div>Gre=
atly appreciate your comments.</div><div><br></div><div>Regards,</div><div>=
Greg</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">O=
n Tue, Jan 31, 2017 at 10:22 AM, Uma Chunduri <span dir=3D"ltr">&lt;<a href=
=3D"mailto:uma.chunduri@huawei.com" target=3D"_blank">uma.chunduri@huawei.c=
om</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"marg=
in:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_-2344136845194405828WordSection1">
<p class=3D"MsoNormal"><a name=3D"m_-2344136845194405828__MailEndCompose"><=
span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;c=
olor:#1f497d">Had a quick look at this diff.<u></u><u></u></span></a></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">This is about unifying the encoding p=
arts in IGP to have a consistent view for BGP-LS encoding or keeping these =
separate and yet having a correct representation
 in BGP-LS for both IGPs.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=3D=3D<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">With variable length bit field for Se=
ction 4.5 and fixed 4 byte value (as indicated as MUST =C2=A0for length) in=
 section 4.3 =C2=A0- I saw a discrepancy =C2=A0in section 4.6
 (BGP-LS) which is referencing section 4.3.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">You have multiple options to fix this=
:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"m_-2344136845194405828MsoListParagraph"><u></u><span style=3D"f=
ont-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><=
span>1.<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif;color:#1f497d">Change section 4.3 to match sect=
ion 4.5 (I am not sure why we have to have variable length for this bit fie=
ld to start with in this case like rfc 7794=E2=80=A6but
 I won=E2=80=99t say much now)<u></u><u></u></span></p>
<p class=3D"m_-2344136845194405828MsoListParagraph"><u></u><span style=3D"f=
ont-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><=
span>2.<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif;color:#1f497d">Change Section 4.6 to represent =
differences in encoding section 4.5 and 4.3 correctly.<u></u><u></u></span>=
</p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in;text-indent:.5in;text-auto=
space:none">
<span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;=
color:#1f497d">=E2=80=9C</span><span style=3D"font-size:10.0pt;font-family:=
&quot;Lucida Console&quot;">Length, RTM, and Reserved fields as defined in =
Section 4.3.=E2=80=9D<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"text-autospace:none"><span style=3D"font-si=
ze:10.0pt;font-family:&quot;Lucida Console&quot;">=C2=A0=C2=A0 3.
</span><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans=
-serif;color:#1f497d">Lastly unify section 4.5 to 4.3 =C2=A0i.e., 4 byte va=
lue with 3 bits defined and 29 bits reserved.</span><span style=3D"font-siz=
e:10.0pt;font-family:&quot;Lucida Console&quot;"><u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">--</span><span style=3D"font-size:11.=
0pt;font-family:&quot;Freestyle Script&quot;;color:#1f497d"><u></u><u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Uma C.</span><span style=3D"font-size=
:11.0pt;font-family:&quot;Brush Script MT&quot;;color:#1f497d"><u></u><u></=
u></span></p>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> mpls [mailto:<a href=3D"mailto=
:mpls-bounces@ietf.org" target=3D"_blank">mpls-bounces@ietf.org</a>]
<b>On Behalf Of </b>Les Ginsberg (ginsberg)<br>
<b>Sent:</b> Tuesday, January 31, 2017 8:22 AM<br>
<b>To:</b> Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=
=3D"_blank">gregimirsky@gmail.com</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ietf.org=
</a>; <a href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">isis-chairs=
@ietf.org</a>; Isis-wg &lt;<a href=3D"mailto:isis-wg-bounces@ietf.org" targ=
et=3D"_blank">isis-wg-bounces@ietf.org</a>&gt;; <a href=3D"mailto:draft-iet=
f-mpls-residence-time@tools.ietf.org" target=3D"_blank">draft-ietf-mpls-res=
idence-<wbr>time@tools.ietf.org</a>; TEAS WG Chairs &lt;<a href=3D"mailto:t=
eas-chairs@ietf.org" target=3D"_blank">teas-chairs@ietf.org</a>&gt;; <a hre=
f=3D"mailto:mpls-chairs@ietf.org" target=3D"_blank">mpls-chairs@ietf.org</a=
>; TEAS WG &lt;<a href=3D"mailto:teas@ietf.org" target=3D"_blank">teas@ietf=
.org</a>&gt;; <a href=3D"mailto:ospf@ietf.org" target=3D"_blank">ospf@ietf.=
org</a>; <a href=3D"mailto:ospf-chairs@ietf.org" target=3D"_blank">ospf-cha=
irs@ietf.org</a><br>
<b>Subject:</b> Re: [mpls] [OSPF] Working group last call on draft-ietf-mpl=
s-residence-time<u></u><u></u></span></p>
</div>
</div><div><div class=3D"h5">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Greg =E2=80=93<u></u><u></u></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Looks good.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 Les<u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Greg Mirsky [<a href=3D"mailto:g=
regimirsky@gmail.com" target=3D"_blank">mailto:gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Tuesday, January 31, 2017 8:06 AM<br>
<b>To:</b> Les Ginsberg (ginsberg)<br>
<b>Cc:</b> Loa Andersson; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>; TEAS WG;
<a href=3D"mailto:ospf@ietf.org" target=3D"_blank">ospf@ietf.org</a>; Isis-=
wg; <a href=3D"mailto:ospf-chairs@ietf.org" target=3D"_blank">
ospf-chairs@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time@=
tools.ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-<wbr>time@tools.ietf.org</a>; TEAS WG Chairs; <a =
href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; <a href=3D"mailto:mpls-chairs@ietf.org" target=3D=
"_blank">mpls-chairs@ietf.org</a><br>
<b>Subject:</b> Re: [OSPF] Working group last call on draft-ietf-mpls-resid=
ence-time<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">Hi Les,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">thank you for your patience and apologies for missin=
g it.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Diff and the update been attached.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Regards,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Greg<u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Tue, Jan 31, 2017 at 5:07 AM, Les Ginsberg (ginsb=
erg) &lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@c=
isco.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Greg =E2=80=93</span><u></u><u></u></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Almost=E2=80=A6</span><u></u><u></u><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Please change the title of Section 7.=
5 to =E2=80=9CIS-IS RTM Capability sub-TLV=E2=80=9D.</span><u></u><u></u></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Please change the title of Table 5 to=
 =E2=80=9CIS-IS RTM Capability sub-TLV Registry Description=E2=80=9D.</span=
><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">The common point being since this is =
not exclusively for TLV 22 we do not want to say =E2=80=9Cfor TLV 22=E2=80=
=9D.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Thanx.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 Les</span><u></u><=
u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Greg Mirsky [mailto:<a href=3D"m=
ailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Monday, January 30, 2017 11:43 PM</span><u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><br>
<b>To:</b> Les Ginsberg (ginsberg)<br>
<b>Cc:</b> Loa Andersson; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>; TEAS WG;
<a href=3D"mailto:ospf@ietf.org" target=3D"_blank">ospf@ietf.org</a>; Isis-=
wg; <a href=3D"mailto:ospf-chairs@ietf.org" target=3D"_blank">
ospf-chairs@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time@=
tools.ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-<wbr>time@tools.ietf.org</a>; TEAS WG Chairs; <a =
href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; <a href=3D"mailto:mpls-chairs@ietf.org" target=3D=
"_blank">mpls-chairs@ietf.org</a><br>
<b>Subject:</b> Re: [OSPF] Working group last call on draft-ietf-mpls-resid=
ence-time<u></u><u></u></p>
</div>
</div>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">Hi Les,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">many thanks for your the most detailed suggestions. =
Hope I&#39;ve it right.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Regards,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Greg<u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">On Mon, Jan 30, 2017 at 11:04 PM, Les Ginsberg (gins=
berg) &lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@=
cisco.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Greg =E2=80=93</span><u></u><u></u></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Thanx for the quick turnaround.</span=
><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Section 4.5 (revised text)</span><u><=
/u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 The capability to suppor=
t RTM on a particular link (interface) is</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 advertised in a new sub-=
TLV which may be included in TLVs advertising</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 Intemediate System (IS) =
Reachability on a specific link (TLVs 22, 23, 222, and 223).</span><u></u><=
u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 The format for the RTM C=
apabilities sub-TLV is presented in Figure 5</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0=C2=A0 0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0 1=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 2</span><u></u=
><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0=C2=A0 0 1 2 3 4 5 =
6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 ...</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 +-+-+-+-+-+-+-+-+-=
+-+-+-+-+-+-<wbr>+-+-+-+-+-+-+-+-+-+-+-+...</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 Type=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0 Leng=
th=C2=A0=C2=A0=C2=A0 | RTM |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 ...</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 +-+-+-+-+-+-+-+-+-=
+-+-+-+-+-+-<wbr>+-+-+-+-+-+-+-+-+-+-+-+...</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 Figure 5: RTM Capability=
 sub-TLV</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=E2=80=A6 (Remainder unchanged)</span=
><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Section 7.5 (revised text)</span><u><=
/u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">7.5.=C2=A0 IS-IS RTM Capability sub-T=
LV
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 IANA is requested to ass=
ign a new Type for RTM capability sub-TLV</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 from the Sub-TLVs for TL=
Vs 22, 23, 141, 222, and 223 registry as</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0 follows:</span><u></u><u=
></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 +------+----------=
---+----+---<wbr>-+-----+-----+-----+----------<wbr>-----+</span><u></u><u>=
</u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 | Type | Descripti=
on | 22 | 23 | 141 | 222 | 223 | Reference=C2=A0=C2=A0=C2=A0=C2=A0 |</span>=
<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 +------+----------=
---+----+---<wbr>-+-----+-----+-----+----------<wbr>-----+</span><u></u><u>=
</u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 | TBA3 |=C2=A0=C2=
=A0=C2=A0=C2=A0 RTM =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0| y=C2=A0 | y=C2=A0 | n=
=C2=A0=C2=A0 | y=C2=A0=C2=A0 | y=C2=A0=C2=A0 | This document |</span><u></u=
><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | Capability |=C2=A0 =C2=A0=
=C2=A0=C2=A0=C2=A0|=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0=C2=A0 |</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 +------+----------=
---+----+---<wbr>-+-----+-----+-----+----------<wbr>-----+</span><u></u><u>=
</u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Table 5: IS-IS RTM Capability sub-TLV =
Registry Description</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Thanx.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0 Les</span><u></u><=
u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><u></u><u></u></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Greg Mirsky [mailto:<a href=3D"m=
ailto:gregimirsky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> Monday, January 30, 2017 10:36 PM<br>
<b>To:</b> Les Ginsberg (ginsberg)<br>
<b>Cc:</b> Loa Andersson; <a href=3D"mailto:mpls@ietf.org" target=3D"_blank=
">mpls@ietf.org</a>; TEAS WG;
<a href=3D"mailto:ospf@ietf.org" target=3D"_blank">ospf@ietf.org</a>; Isis-=
wg; <a href=3D"mailto:ospf-chairs@ietf.org" target=3D"_blank">
ospf-chairs@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-residence-time@=
tools.ietf.org" target=3D"_blank">
draft-ietf-mpls-residence-<wbr>time@tools.ietf.org</a>; TEAS WG Chairs; <a =
href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">
isis-chairs@ietf.org</a>; <a href=3D"mailto:mpls-chairs@ietf.org" target=3D=
"_blank">mpls-chairs@ietf.org</a><br>
<b>Subject:</b> Re: [OSPF] Working group last call on draft-ietf-mpls-resid=
ence-time</span><u></u><u></u></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">Hi Les,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">attached are diff and the updated version -14. Would=
 be much obliged to hear from you if the updates are according to your sugg=
estions and address your comments.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Kind regards,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Greg<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">On Mon, Jan 30, 2017 at 1:11 PM, Les Ginsberg (ginsb=
erg) &lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@c=
isco.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<div>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
Loa -<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
The change for IS-IS encoding to utilize a sub-TLV of TLV 22 et al to adver=
tise RTM capability is a better solution than the previous proposal and thi=
s has my support.<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
However, there are some details as regards the proposed sub-TLV that should=
 be revised.<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
1)Rather than use a fixed 16 bit field for the flags I suggest you utilize =
the encoding style introduced in RFC 7794 (see Section 2.1) which allows fo=
r a variable length flags field. This addresses two issues:<u></u><u></u></=
p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0=C2=A0 o You need never worry that the size of the flags field will b=
e too small for future extensions<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0=C2=A0 o It minimizes the number of bytes required to be sent<u></u><=
u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
The latter point is something IS-IS has always been more conservative about=
 than OSPF because of the fixed size of an LSP set which can be advertised =
by a single router.<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
2)In the IANA considerations you have limited the sub-TLV to being used in =
TLV 22 only, but there is no reason to do so. This does not allow MT to be =
supported and it needlessly prevents use of the sub-TLV by the RFC 5311 ext=
ensions (however unpopular those
 may be). I can understand why the sub-TLV may not be useful in TLV 141, th=
erefore I suggest the table in Section 7.5 be revised to be:<u></u><u></u><=
/p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0=C2=A0=C2=A0 | Type | Description | 22 | 23 | 141 | 222 | 223 | Refer=
ence=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0=C2=A0=C2=A0+------+-------------+----+<wbr>----+-----+-----+-----+--=
-----<wbr>--------+=C2=A0=C2=A0=C2=A0=C2=A0 <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0=C2=A0| TBA3 |=C2=A0=C2=A0=C2=A0 RTM=C2=A0=C2=A0=C2=A0=C2=A0 =C2=A0=
=C2=A0| y=C2=A0 | y=C2=A0 | n=C2=A0=C2=A0 | y=C2=A0=C2=A0 | y=C2=A0=C2=A0 |=
 This document |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 <u></u>
<u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0=C2=A0=C2=A0 +------+-------------+----+---<wbr>-+-----+-----+-----+-=
---------<wbr>-----+=C2=A0=C2=A0=C2=A0=C2=A0 <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
i.e. &quot;y&quot; for all but TLV 141 (in case the ASCII art doesn&#39;t t=
ranslate well in your mailer).<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">You should also remove the reference to RFC 5305 in =
Section 4.5 as it is too limiting. Simply referencing the IANA registry
<a href=3D"http://www.iana.org/assignments/isis-tlv-codepoints/isis-tlv-cod=
epoints.xhtml%23isis-tlv-codepoints-22-23-141-222-223" target=3D"_blank">
http://www.iana.org/<wbr>assignments/isis-tlv-<wbr>codepoints/isis-tlv-<wbr=
>codepoints.xhtml#isis-tlv-<wbr>codepoints-22-23-141-222-223</a> should be =
sufficient. All necessary references can be found there.<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
3)An editorial correction:<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
Introduction 3<sup>rd</sup> paragraph:<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
s/ Althugh/ Although<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0=C2=A0 Les<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
=C2=A0<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; -----Original Message-----<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; From: OSPF [mailto:<a href=3D"mailto:ospf-bounces@ietf.org" target=3D"=
_blank">ospf-bounces@ietf.org</a>] On Behalf Of Loa Andersson<u></u><u></u>=
</p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; Sent: Monday, January 30, 2017 8:02 AM<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; To: <a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ietf.org</=
a>; TEAS WG; <a href=3D"mailto:ospf@ietf.org" target=3D"_blank">
ospf@ietf.org</a>; Isis-wg<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; Cc: <a href=3D"mailto:isis-chairs@ietf.org" target=3D"_blank">isis-cha=
irs@ietf.org</a>;
<a href=3D"mailto:draft-ietf-mpls-residence-time@tools.ietf.org" target=3D"=
_blank">draft-ietf-mpls-residence-<wbr>time@tools.ietf.org</a>; TEAS<u></u>=
<u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; WG Chairs; <a href=3D"mailto:mpls-chairs@ietf.org" target=3D"_blank">m=
pls-chairs@ietf.org</a>;
<a href=3D"mailto:ospf-chairs@ietf.org" target=3D"_blank">ospf-chairs@ietf.=
org</a><u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; Subject: [OSPF] Working group last call on draft-ietf-mpls-residence-t=
ime<u></u><u></u></p>
<div>
<div>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; Working Groups,<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; This is to initiate a two week working group last call in four working=
 groups on<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; draft-ietf-mpls-residence-<wbr>time-13.<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; The MPLS working group has done an earlier working group last call and=
 a<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; request for publication has been made.<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; The changes to the document were such that we decided to do a new<u></=
u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; working group last call and extend it to MPLS, TEAS, OSPF and IS-IS.<u=
></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; There are three major changes between the version of the document for<=
u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; which publication was requested are:<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; (1) that section 7 &quot; One-step Clock and Two-step Clock Modes&quot=
; has been<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0moved up to become section 2.1.<u></u><u=
></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; (2) that a sub-TLV for TLV 22 instead of TLV 251 is used to RTM<u></u>=
<u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Capability when IS-IS used advertise RTM=
 capabilities<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; (3) BGP-LS has been added as a RTM capability advertisement method<u><=
/u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; A side-by-side diff between version -12 and -13 is available at:<u></u=
><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-mpls-residen=
ce-time-13" target=3D"_blank">
<span style=3D"color:windowtext;text-decoration:none">https://www.ietf.org/=
rfcdiff?<wbr>url2=3Ddraft-ietf-mpls-<wbr>residence-time-13</span></a><u></u=
><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; Please send your comments to the mpls wg mailing list (<a href=3D"mail=
to:mpls@ietf.org" target=3D"_blank"><span style=3D"color:windowtext;text-de=
coration:none">mpls@ietf.org</span></a>), if<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; you are not subscribed to the mpls wg list, send to &quot;your own&quo=
t;<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; working group mailing list, and we&#39;ll make sure they are posted to=
 the MPLS<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; wg list.<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; There were one IPR disclosure against this document.<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; All the authors and contributors have stated on the working group mail=
ing list<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; that they are not aware of any other IPRs that relates to this documen=
t.<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; This working group last call ends February 13, 2017.<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; /Loa<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; MPLS wg co-chairs<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; --<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; Loa Andersson=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=
=C2=A0=C2=A0 email: <a href=3D"mailto:loa@mail01.huawei.com" target=3D"_bla=
nk">
<span style=3D"color:windowtext;text-decoration:none">loa@mail01.huawei.com=
</span></a><u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; Senior MPLS Expert=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0<wbr>=C2=A0 <a href=3D"mailto:loa@pi.nu" target=3D"_blank=
">
<span style=3D"color:windowtext;text-decoration:none">loa@pi.nu</span></a><=
u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; Huawei Technologies (consultant)=C2=A0=C2=A0=C2=A0=C2=A0 phone: +46 73=
9 81 21 64<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; ______________________________<wbr>_________________<u></u><u></u></p>
</div>
</div>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; OSPF mailing list<u></u><u></u></p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <a href=3D"mailto:OSPF@ietf.org" target=3D"_blank"><span style=3D"colo=
r:windowtext;text-decoration:none">OSPF@ietf.org</span></a><u></u><u></u></=
p>
<p class=3D"m_-2344136845194405828m7832089522784764482m8733016173006011846m=
2337760234444598969msoplaintext">
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/ospf" target=3D"_blan=
k"><span style=3D"color:windowtext;text-decoration:none">https://www.ietf.o=
rg/mailman/<wbr>listinfo/ospf</span></a><u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
______________________________<wbr>_________________<br>
OSPF mailing list<br>
<a href=3D"mailto:OSPF@ietf.org" target=3D"_blank">OSPF@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/ospf" target=3D"_blank">ht=
tps://www.ietf.org/mailman/<wbr>listinfo/ospf</a><u></u><u></u></p>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div></div></div>
</div>

</blockquote></div><br></div>

--001a113d48066d73f205476f8263--

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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: Greg Mirsky <gregimirsky@gmail.com>, Uma Chunduri <uma.chunduri@huawei.com>
Thread-Topic: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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Subject: Re: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Greg Mirsky <gregimirsky@gmail.com>, Uma Chunduri <uma.chunduri@huawei.com>
Thread-Topic: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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Cc: "Les Ginsberg \(ginsberg\)" <ginsberg@cisco.com>, "isis-chairs@ietf.org" <isis-chairs@ietf.org>, Isis-wg <isis-wg-bounces@ietf.org>, "draft-ietf-mpls-residence-time@tools.ietf.org" <draft-ietf-mpls-residence-time@tools.ietf.org>, "mpls@ietf.org" <mpls@ietf.org>, TEAS WG Chairs <teas-chairs@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, TEAS WG <teas@ietf.org>, "ospf@ietf.org" <ospf@ietf.org>, "ospf-chairs@ietf.org" <ospf-chairs@ietf.org>
Subject: Re: [mpls] [OSPF] Working group last call on draft-ietf-mpls-residence-time
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Hi Greg,=20
Changes look good to me also.
Thanks,
Acee

On 1/31/17, 7:18 PM, "Greg Mirsky" <gregimirsky@gmail.com> wrote:

>Hi Uma, Acee, Les, et. al,
>attached please find diff and the updated version. I think I've got it
>right by now.
>Greatly appreciate your comments.
>
>Regards,
>Greg
>
>On Tue, Jan 31, 2017 at 10:22 AM, Uma Chunduri <uma.chunduri@huawei.com>
>wrote:
>
>> Had a quick look at this diff.
>>
>>
>>
>> This is about unifying the encoding parts in IGP to have a consistent
>>view
>> for BGP-LS encoding or keeping these separate and yet having a correct
>> representation in BGP-LS for both IGPs.
>>
>>
>>
>> =3D=3D
>>
>> With variable length bit field for Section 4.5 and fixed 4 byte value
>>(as
>> indicated as MUST  for length) in section 4.3  - I saw a discrepancy  in
>> section 4.6 (BGP-LS) which is referencing section 4.3.
>>
>>
>>
>> You have multiple options to fix this:
>>
>>
>>
>> 1.       Change section 4.3 to match section 4.5 (I am not sure why we
>> have to have variable length for this bit field to start with in this
>>case
>> like rfc 7794=8Abut I won=B9t say much now)
>>
>> 2.       Change Section 4.6 to represent differences in encoding section
>> 4.5 and 4.3 correctly.
>>
>> =B3Length, RTM, and Reserved fields as defined in Section 4.3.=B2
>>
>>    3. Lastly unify section 4.5 to 4.3  i.e., 4 byte value with 3 bits
>> defined and 29 bits reserved.
>>
>> --
>>
>> Uma C.
>>
>>
>>
>> *From:* mpls [mailto:mpls-bounces@ietf.org] *On Behalf Of *Les Ginsberg
>> (ginsberg)
>> *Sent:* Tuesday, January 31, 2017 8:22 AM
>> *To:* Greg Mirsky <gregimirsky@gmail.com>
>> *Cc:* mpls@ietf.org; isis-chairs@ietf.org; Isis-wg <
>> isis-wg-bounces@ietf.org>;
>>draft-ietf-mpls-residence-time@tools.ietf.org;
>> TEAS WG Chairs <teas-chairs@ietf.org>; mpls-chairs@ietf.org; TEAS WG <
>> teas@ietf.org>; ospf@ietf.org; ospf-chairs@ietf.org
>> *Subject:* Re: [mpls] [OSPF] Working group last call on
>> draft-ietf-mpls-residence-time
>>
>>
>>
>> Greg =AD
>>
>>
>>
>> Looks good.
>>
>>
>>
>>    Les
>>
>>
>>
>> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com
>><gregimirsky@gmail.com>]
>>
>> *Sent:* Tuesday, January 31, 2017 8:06 AM
>> *To:* Les Ginsberg (ginsberg)
>> *Cc:* Loa Andersson; mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg;
>> ospf-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org;
>>TEAS
>> WG Chairs; isis-chairs@ietf.org; mpls-chairs@ietf.org
>> *Subject:* Re: [OSPF] Working group last call on
>> draft-ietf-mpls-residence-time
>>
>>
>>
>> Hi Les,
>>
>> thank you for your patience and apologies for missing it.
>>
>> Diff and the update been attached.
>>
>>
>>
>> Regards,
>>
>> Greg
>>
>>
>>
>> On Tue, Jan 31, 2017 at 5:07 AM, Les Ginsberg (ginsberg) <
>> ginsberg@cisco.com> wrote:
>>
>> Greg =AD
>>
>>
>>
>> Almost=8A
>>
>>
>>
>> Please change the title of Section 7.5 to =B3IS-IS RTM Capability
>>sub-TLV=B2.
>>
>>
>>
>> Please change the title of Table 5 to =B3IS-IS RTM Capability sub-TLV
>> Registry Description=B2.
>>
>>
>>
>> The common point being since this is not exclusively for TLV 22 we do
>>not
>> want to say =B3for TLV 22=B2.
>>
>> Thanx.
>>
>>
>>
>>     Les
>>
>>
>>
>>
>>
>> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com]
>> *Sent:* Monday, January 30, 2017 11:43 PM
>>
>>
>> *To:* Les Ginsberg (ginsberg)
>> *Cc:* Loa Andersson; mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg;
>> ospf-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org;
>>TEAS
>> WG Chairs; isis-chairs@ietf.org; mpls-chairs@ietf.org
>> *Subject:* Re: [OSPF] Working group last call on
>> draft-ietf-mpls-residence-time
>>
>>
>>
>> Hi Les,
>>
>> many thanks for your the most detailed suggestions. Hope I've it right.
>>
>>
>>
>> Regards,
>>
>> Greg
>>
>>
>>
>> On Mon, Jan 30, 2017 at 11:04 PM, Les Ginsberg (ginsberg) <
>> ginsberg@cisco.com> wrote:
>>
>> Greg =AD
>>
>>
>>
>> Thanx for the quick turnaround.
>>
>>
>>
>> Section 4.5 (revised text)
>>
>>
>>
>>    The capability to support RTM on a particular link (interface) is
>>
>>    advertised in a new sub-TLV which may be included in TLVs advertising
>>
>>    Intemediate System (IS) Reachability on a specific link (TLVs 22, 23,
>> 222, and 223).
>>
>>
>>
>>    The format for the RTM Capabilities sub-TLV is presented in Figure 5
>>
>>
>>
>>      0                   1                   2
>>
>>      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 ...
>>
>>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...
>>
>>     |      Type     |     Length    | RTM |              ...
>>
>>     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...
>>
>>
>>
>>    Figure 5: RTM Capability sub-TLV
>>
>>
>>
>> =8A (Remainder unchanged)
>>
>>
>>
>> Section 7.5 (revised text)
>>
>>
>>
>> 7.5.  IS-IS RTM Capability sub-TLV
>>
>>
>>
>>    IANA is requested to assign a new Type for RTM capability sub-TLV
>>
>>    from the Sub-TLVs for TLVs 22, 23, 141, 222, and 223 registry as
>>
>>    follows:
>>
>>
>>
>>     +------+-------------+----+----+-----+-----+-----+---------------+
>>
>>     | Type | Description | 22 | 23 | 141 | 222 | 223 | Reference     |
>>
>>     +------+-------------+----+----+-----+-----+-----+---------------+
>>
>>     | TBA3 |     RTM      | y  | y  | n   | y   | y   | This document |
>>
>>     |           | Capability |      |     |      |       |
>> |                                |
>>
>>     +------+-------------+----+----+-----+-----+-----+---------------+
>>
>>
>>
>>              Table 5: IS-IS RTM Capability sub-TLV Registry Description
>>
>>
>>
>>
>>
>> Thanx.
>>
>>
>>
>>     Les
>>
>>
>>
>> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com]
>> *Sent:* Monday, January 30, 2017 10:36 PM
>> *To:* Les Ginsberg (ginsberg)
>> *Cc:* Loa Andersson; mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg;
>> ospf-chairs@ietf.org; draft-ietf-mpls-residence-time@tools.ietf.org;
>>TEAS
>> WG Chairs; isis-chairs@ietf.org; mpls-chairs@ietf.org
>> *Subject:* Re: [OSPF] Working group last call on
>> draft-ietf-mpls-residence-time
>>
>>
>>
>> Hi Les,
>>
>> attached are diff and the updated version -14. Would be much obliged to
>> hear from you if the updates are according to your suggestions and
>>address
>> your comments.
>>
>>
>>
>> Kind regards,
>>
>> Greg
>>
>>
>>
>>
>>
>> On Mon, Jan 30, 2017 at 1:11 PM, Les Ginsberg (ginsberg) <
>> ginsberg@cisco.com> wrote:
>>
>> Loa -
>>
>>
>>
>> The change for IS-IS encoding to utilize a sub-TLV of TLV 22 et al to
>> advertise RTM capability is a better solution than the previous proposal
>> and this has my support.
>>
>> However, there are some details as regards the proposed sub-TLV that
>> should be revised.
>>
>>
>>
>> 1)Rather than use a fixed 16 bit field for the flags I suggest you
>>utilize
>> the encoding style introduced in RFC 7794 (see Section 2.1) which allows
>> for a variable length flags field. This addresses two issues:
>>
>>
>>
>>    o You need never worry that the size of the flags field will be too
>> small for future extensions
>>
>>    o It minimizes the number of bytes required to be sent
>>
>>
>>
>> The latter point is something IS-IS has always been more conservative
>> about than OSPF because of the fixed size of an LSP set which can be
>> advertised by a single router.
>>
>>
>>
>> 2)In the IANA considerations you have limited the sub-TLV to being used
>>in
>> TLV 22 only, but there is no reason to do so. This does not allow MT to
>>be
>> supported and it needlessly prevents use of the sub-TLV by the RFC 5311
>> extensions (however unpopular those may be). I can understand why the
>> sub-TLV may not be useful in TLV 141, therefore I suggest the table in
>> Section 7.5 be revised to be:
>>
>>
>>
>>
>>
>>     | Type | Description | 22 | 23 | 141 | 222 | 223 | Reference
>> |
>>
>>    +------+-------------+----+----+-----+-----+-----+---------------+
>>
>>   | TBA3 |    RTM       | y  | y  | n   | y   | y   | This document
>> |
>>
>>     +------+-------------+----+----+-----+-----+-----+---------------+
>>
>>
>>
>>
>> i.e. "y" for all but TLV 141 (in case the ASCII art doesn't translate
>>well
>> in your mailer).
>>
>>
>>
>> You should also remove the reference to RFC 5305 in Section 4.5 as it is
>> too limiting. Simply referencing the IANA registry http://www.iana.org/
>> assignments/isis-tlv-codepoints/isis-tlv-codepoints.xhtml#isis-tlv-
>> codepoints-22-23-141-222-223 should be sufficient. All necessary
>> references can be found there.
>>
>>
>>
>> 3)An editorial correction:
>>
>>
>>
>> Introduction 3rd paragraph:
>>
>>
>>
>> s/ Althugh/ Although
>>
>>
>>
>>    Les
>>
>>
>>
>> > -----Original Message-----
>>
>> > From: OSPF [mailto:ospf-bounces@ietf.org] On Behalf Of Loa Andersson
>>
>> > Sent: Monday, January 30, 2017 8:02 AM
>>
>> > To: mpls@ietf.org; TEAS WG; ospf@ietf.org; Isis-wg
>>
>> > Cc: isis-chairs@ietf.org;
>>draft-ietf-mpls-residence-time@tools.ietf.org;
>> TEAS
>>
>> > WG Chairs; mpls-chairs@ietf.org; ospf-chairs@ietf.org
>>
>> > Subject: [OSPF] Working group last call on
>>draft-ietf-mpls-residence-time
>>
>> >
>>
>> > Working Groups,
>>
>> >
>>
>> > This is to initiate a two week working group last call in four working
>> groups on
>>
>> > draft-ietf-mpls-residence-time-13.
>>
>> >
>>
>> > The MPLS working group has done an earlier working group last call
>>and a
>>
>> > request for publication has been made.
>>
>> >
>>
>> > The changes to the document were such that we decided to do a new
>>
>> > working group last call and extend it to MPLS, TEAS, OSPF and IS-IS.
>>
>> >
>>
>> > There are three major changes between the version of the document for
>>
>> > which publication was requested are:
>>
>> >
>>
>> > (1) that section 7 " One-step Clock and Two-step Clock Modes" has been
>>
>> >      moved up to become section 2.1.
>>
>> > (2) that a sub-TLV for TLV 22 instead of TLV 251 is used to RTM
>>
>> >      Capability when IS-IS used advertise RTM capabilities
>>
>> > (3) BGP-LS has been added as a RTM capability advertisement method
>>
>> >
>>
>> > A side-by-side diff between version -12 and -13 is available at:
>>
>> > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-mpls-residence-time-13
>>
>> >
>>
>> > Please send your comments to the mpls wg mailing list (mpls@ietf.org),
>> if
>>
>> > you are not subscribed to the mpls wg list, send to "your own"
>>
>> > working group mailing list, and we'll make sure they are posted to the
>> MPLS
>>
>> > wg list.
>>
>> >
>>
>> > There were one IPR disclosure against this document.
>>
>> >
>>
>> > All the authors and contributors have stated on the working group
>> mailing list
>>
>> > that they are not aware of any other IPRs that relates to this
>>document

