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Subject: [OSPF] RFC 7770 on Extensions to OSPF for Advertising Optional Router Capabilities
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A new Request for Comments is now available in online RFC libraries.

        
        RFC 7770

        Title:      Extensions to OSPF for Advertising 
                    Optional Router Capabilities 
        Author:     A. Lindem, Ed.,
                    N. Shen,
                    JP. Vasseur,
                    R. Aggarwal,
                    S. Shaffer
        Status:     Standards Track
        Stream:     IETF
        Date:       February 2016
        Mailbox:    acee@cisco.com, 
                    naiming@cisco.com, 
                    jpv@cisco.com,
                    raggarwa_1@yahoo.com, 
                    sshaffer@akamai.com
        Pages:      15
        Characters: 32855
        Obsoletes:  RFC 4970

        I-D Tag:    draft-ietf-ospf-rfc4970bis-07.txt

        URL:        https://www.rfc-editor.org/info/rfc7770

        DOI:        http://dx.doi.org/10.17487/RFC7770

It is useful for routers in an OSPFv2 or OSPFv3 routing domain to
know the capabilities of their neighbors and other routers in the
routing domain.  This document proposes extensions to OSPFv2 and
OSPFv3 for advertising optional router capabilities.  The Router
Information (RI) Link State Advertisement (LSA) is defined for this
purpose.  In OSPFv2, the RI LSA will be implemented with an Opaque
LSA type ID.  In OSPFv3, the RI LSA will be implemented with a unique
LSA type function code.  In both protocols, the RI LSA can be
advertised at any of the defined flooding scopes (link, area, or
autonomous system (AS)).  This document obsoletes RFC 4970 by
providing a revised specification that includes support for
advertisement of multiple instances of the RI LSA and a TLV for
functional capabilities.

This document is a product of the Open Shortest Path First IGP Working Group of the IETF.

This is now a Proposed Standard.

STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements.  Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the 
standardization state and status of this protocol.  Distribution of this 
memo is unlimited.

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The RFC Editor Team
Association Management Solutions, LLC


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To: "Anton Smirnov (asmirnov)" <asmirnov@cisco.com>, OSPF WG List <ospf@ietf.org>
Thread-Topic: [OSPF] WG Adoption Call for "OSPF Stub Neighbors"
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Subject: Re: [OSPF] WG Adoption Call for "OSPF Stub Neighbors"
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From nobody Thu Feb  4 11:16:49 2016
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From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
To: "Acee Lindem (acee)" <acee@cisco.com>
Thread-Topic: [OSPF] More Comments on OSPF S-BFD Discriminator
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Date: Thu, 4 Feb 2016 19:16:44 +0000
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Subject: Re: [OSPF] More Comments on OSPF S-BFD Discriminator
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Hi, Acee,

Following up on your note below regarding =
draft-ietf-ospf-sbfd-discriminator, could you request publication and =
send this document to the IESG?

[BTW, its sibling document on ISIS is already in IESG ballot.]

Thanks!

=E2=80=94 Carlos.

> On Nov 11, 2015, at 4:16 PM, Acee Lindem (acee) <acee@cisco.com> =
wrote:
>=20
> I was more concerned about the consumer of the information than the =
IGPs. I did look at base S-BFD draft and I agree this unspecified. =
Let=E2=80=99s go forward than with the proposed text and I will request =
publication.
>=20
> Thanks,
> Acee
>=20
>=20


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charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">Hi, Acee,<div class=3D""><br class=3D""></div><div =
class=3D"">Following up on your note below regarding =
draft-ietf-ospf-sbfd-discriminator, could you request publication and =
send this document to the IESG?</div><div class=3D""><br =
class=3D""></div><div class=3D"">[BTW, its sibling document on ISIS is =
already in IESG ballot.]</div><div class=3D""><br class=3D""></div><div =
class=3D"">Thanks!</div><div class=3D""><br class=3D""></div><div =
class=3D"">=E2=80=94 Carlos.</div><div class=3D""><br =
class=3D""></div><div><blockquote type=3D"cite" class=3D""><div =
class=3D"">On Nov 11, 2015, at 4:16 PM, Acee Lindem (acee) &lt;<a =
href=3D"mailto:acee@cisco.com" class=3D"">acee@cisco.com</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><div =
style=3D"font-family: Calibri, sans-serif; font-size: 14px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D"">I was more concerned =
about the consumer of the information than the IGPs. I did look at base =
S-BFD draft and I agree this unspecified. Let=E2=80=99s go forward than =
with the proposed text and I will request publication.&nbsp;</div><div =
style=3D"font-family: Calibri, sans-serif; font-size: 14px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D""><br class=3D""></div><div=
 style=3D"font-family: Calibri, sans-serif; font-size: 14px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D"">Thanks,</div><div =
style=3D"font-family: Calibri, sans-serif; font-size: 14px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D"">Acee&nbsp;</div><div =
style=3D"font-family: Calibri, sans-serif; font-size: 14px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D""><br class=3D""></div><br =
class=3D"Apple-interchange-newline"></div></blockquote></div><br =
class=3D""></body></html>=

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From: "Acee Lindem (acee)" <acee@cisco.com>
To: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
Thread-Topic: [OSPF] More Comments on OSPF S-BFD Discriminator
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Date: Thu, 4 Feb 2016 19:24:02 +0000
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References: <D252E730.385E8%acee@cisco.com> <CAG1kdojiU6fzn7XYSSdpfabxMDUQYvbgNNRCjZbraJKq2+WwJQ@mail.gmail.com> <D2668656.3CED2%acee@cisco.com> <c3caff28c3d243b99e523be8bc64719f@XCH-ALN-001.cisco.com> <D2669DC6.3CF08%acee@cisco.com> <8ef4f51407804a91950ab126277368a6@XCH-ALN-001.cisco.com> <D2691731.3D460%acee@cisco.com> <DBFC89CC-221C-42C8-8A11-E0E5A49170EC@cisco.com>
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From: "Derek Man-Kit Yeung (myeung)" <myeung@cisco.com>
To: Alan Davey <Alan.Davey@metaswitch.com>, "draft-ietf-ospf-yang@ietf.org" <draft-ietf-ospf-yang@ietf.org>
Thread-Topic: draft-ietf-ospf-yang-03 questions and doubts
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Date: Thu, 4 Feb 2016 19:38:51 +0000
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Subject: Re: [OSPF] draft-ietf-ospf-yang-03 questions and doubts
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--_000_D2D8C45173937myeungciscocom_
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Hi Alan,

Thanks for the comments.
As you have pointed out, there are OSPFv3 specific fields missing in the mo=
del now. For example, instance ID and interface ID. We will add them in the=
 next update.

As for the DR, DR is conceptually one of the neighbor.
In OSPFv2, the DR's router ID and IP address are used in protocol operation=
.
While in OSPFv3, the DR's router ID and interface ID are used in protocol o=
peration.
According to OSPFv2 and OSPFv3 RFC, the interface structure should keep bot=
h the DR's router ID and IP address.

We have the following in the current model.

  grouping interface-operation {
    leaf dr {
      type inet:ipv4-address;
      description "Designated Router (DR) IP address.";
    }
  }
  grouping neighbor-operation {
    leaf dr {
      type yang:dotted-quad;
      description
        "Designated Router.";
    }
  }

To better match the RFC and accommodate both OSPFv2 and OSPFv3 in a cleaner=
 way, we plan to make the following changes.

  grouping interface-operation {
    leaf dr-router-id {
      type yang:dotted-quad;
      description
        "Designated Router (DR) router ID.";
    }
    leaf dr-ip-address {
      type inet:ip-address;
      description "Designated Router (DR) IP address.";
    }
  }
  grouping neighbor-operation {
    leaf dr-router-id {
      type yang:dotted-quad;
      description
        "Neighbor's Designated Router (DR) router ID.";
    }
    leaf dr-ip-address {
      type inet:ip-address;
      description "Neighbor's Designated Router (DR) IP address.";
    }
  }

If one need the DR's interface ID in the OSPFv3 case, it could be found by =
locating the neighbor entry for the DR and get the interface ID (To be adde=
d) field there.

Comments welcome.

Thanks,
- Derek

From: Alan Davey <Alan.Davey@metaswitch.com<mailto:Alan.Davey@metaswitch.co=
m>>
Date: Tuesday, December 15, 2015 8:23 AM
To: "draft-ietf-ospf-yang@ietf.org<mailto:draft-ietf-ospf-yang@ietf.org>" <=
draft-ietf-ospf-yang@ietf.org<mailto:draft-ietf-ospf-yang@ietf.org>>
Cc: "ospf@ietf.org<mailto:ospf@ietf.org>" <ospf@ietf.org<mailto:ospf@ietf.o=
rg>>
Subject: draft-ietf-ospf-yang-03 questions and doubts

Folks

I have a doubt about draft-ietf-ospf-yang-03.  Please let me know your thou=
ghts on the following.

The text is OSPFv2-specific in places.  I think that it would be better to =
define separate top-level groupings and containers for OSPFv2 and OSPFv3 an=
d define common groupings and containers, where possible, that are used by =
both.

For example, grouping interface-operation contains the following, which is =
incorrect for OSPFv3.


-          leaf dr with type ipv4-address

-          leaf bdr with type ipv4-address.

I think that it would be better to define something along the following lin=
es.


-          ospfv3-interface-operation {

o   uses interface-config

o   uses ospf-common-interface-operation

o   leaf dr {

=A7  type if:interface-ref

=A7  description:

=B7                   "The remote interface ID used by the Designated Route=
r on

=B7                   this link.  This is the interface index of the interf=
ace local to the DR.";

o   etc

-          ospfv2-interface-operation {

o   uses interface-config

o   uses ospf-common-interface-operation

o   leaf dr {

=A7           type inet:ipv4-address;

=A7           description "Designated Router (DR) IP address.";

o   etc.

Regards
Alan Davey


--_000_D2D8C45173937myeungciscocom_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</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 Alan,</div>
<div><br>
</div>
<div>Thanks for the comments.</div>
<div>As you have pointed out, there are OSPFv3 specific fields missing in t=
he model now. For example, instance ID and interface ID. We will add them i=
n the next update.</div>
<div><br>
</div>
<div>As for the DR, DR is conceptually one of the neighbor.&nbsp;</div>
<div>In OSPFv2, the DR's router ID and IP address are used in protocol oper=
ation.</div>
<div>While in OSPFv3, the DR's router ID and interface ID are used in proto=
col operation.</div>
<div>According to OSPFv2 and OSPFv3 RFC, the interface structure should kee=
p both the DR's router ID and IP address.</div>
<div><br>
</div>
<div>We have the following in the current model.</div>
<div><br>
</div>
<div>
<div>&nbsp; grouping interface-operation {</div>
<div>&nbsp; &nbsp; leaf dr {</div>
<div>&nbsp; &nbsp; &nbsp; type inet:ipv4-address;</div>
<div>&nbsp; &nbsp; &nbsp; description &quot;Designated Router (DR) IP addre=
ss.&quot;;</div>
<div>&nbsp; &nbsp; }</div>
</div>
<div>&nbsp; }</div>
<div>
<div>&nbsp; grouping neighbor-operation {</div>
<div>&nbsp; &nbsp; leaf dr {</div>
<div>&nbsp; &nbsp; &nbsp; type yang:dotted-quad;</div>
<div>&nbsp; &nbsp; &nbsp; description</div>
<div>&nbsp; &nbsp; &nbsp; &nbsp; &quot;Designated Router.&quot;;</div>
<div>&nbsp; &nbsp; }</div>
</div>
<div>&nbsp; }</div>
<div><br>
</div>
<div>To better match the RFC and accommodate both OSPFv2 and OSPFv3 in a cl=
eaner way, we plan to make the following changes.</div>
<div><br>
</div>
<div>
<div>
<div>&nbsp; grouping interface-operation {</div>
<div>
<div>&nbsp; &nbsp; leaf dr-router-id {</div>
<div>&nbsp; &nbsp; &nbsp; type yang:dotted-quad;</div>
<div>&nbsp; &nbsp; &nbsp; description</div>
<div>&nbsp; &nbsp; &nbsp; &nbsp; &quot;Designated Router (DR) router ID.&qu=
ot;;</div>
<div>&nbsp; &nbsp; }</div>
</div>
<div></div>
<div>&nbsp; &nbsp; leaf dr-ip-address {</div>
<div>&nbsp; &nbsp; &nbsp; type inet:ip-address;</div>
<div>&nbsp; &nbsp; &nbsp; description &quot;Designated Router (DR) IP addre=
ss.&quot;;</div>
<div>&nbsp; &nbsp; }</div>
</div>
<div>&nbsp; }</div>
<div>
<div>&nbsp; grouping neighbor-operation {</div>
<div>&nbsp; &nbsp; leaf dr-router-id {</div>
<div>&nbsp; &nbsp; &nbsp; type yang:dotted-quad;</div>
<div>&nbsp; &nbsp; &nbsp; description</div>
<div>&nbsp; &nbsp; &nbsp; &nbsp; &quot;Neighbor's Designated Router (DR) ro=
uter ID.&quot;;</div>
<div>&nbsp; &nbsp; }</div>
</div>
<div>
<div>&nbsp; &nbsp; leaf dr-ip-address {</div>
<div>&nbsp; &nbsp; &nbsp; type inet:ip-address;</div>
<div>&nbsp; &nbsp; &nbsp; description &quot;Neighbor's Designated Router (D=
R) IP address.&quot;;</div>
<div>&nbsp; &nbsp; }</div>
</div>
<div>&nbsp; }</div>
</div>
<div><br>
</div>
<div>If one need the DR's interface ID in the OSPFv3 case, it could be foun=
d by locating the neighbor entry for the DR and get the interface ID (To be=
 added) field there.</div>
<div><br>
</div>
<div>Comments welcome.</div>
<div><br>
</div>
<div>Thanks,</div>
<div>- Derek</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>Alan Davey &lt;<a href=3D"mai=
lto:Alan.Davey@metaswitch.com">Alan.Davey@metaswitch.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Tuesday, December 15, 2015 8:=
23 AM<br>
<span style=3D"font-weight:bold">To: </span>&quot;<a href=3D"mailto:draft-i=
etf-ospf-yang@ietf.org">draft-ietf-ospf-yang@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:draft-ietf-ospf-yang@ietf.org">draft-ietf-ospf-yang@ietf.org</a>=
&gt;<br>
<span style=3D"font-weight:bold">Cc: </span>&quot;<a href=3D"mailto:ospf@ie=
tf.org">ospf@ietf.org</a>&quot; &lt;<a href=3D"mailto:ospf@ietf.org">ospf@i=
etf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>draft-ietf-ospf-yang-03 qu=
estions and doubts<br>
</div>
<div><br>
</div>
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<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal">Folks<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I have a doubt about draft-ietf-ospf-yang-03.&nbsp; =
Please let me know your thoughts on the following.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The text is OSPFv2-specific in places.&nbsp; I think=
 that it would be better to define separate top-level groupings and contain=
ers for OSPFv2 and OSPFv3 and define common groupings and containers, where=
 possible, that are used by both.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">For example, grouping interface-operation contains t=
he following, which is incorrect for OSPFv3.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo1"><!--[if !supportLists]--><span style=3D"mso-list:Ignore">-<span st=
yle=3D"font-style: normal; font-variant: normal; font-weight: normal; font-=
size: 7pt; line-height: normal; font-family: 'Times New Roman'; ">&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><!--[endif]-->leaf dr with type ipv4-address<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo1"><!--[if !supportLists]--><span style=3D"mso-list:Ignore">-<span st=
yle=3D"font-style: normal; font-variant: normal; font-weight: normal; font-=
size: 7pt; line-height: normal; font-family: 'Times New Roman'; ">&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><!--[endif]-->leaf bdr with type ipv4-address.</p>
</div>
</div>
</div>
</span>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:o=3D"urn:schemas-micro=
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0">
<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal">I think that it would be better to define something =
along the following lines.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo1"><!--[if !supportLists]--><span style=3D"mso-list:Ignore">-<span st=
yle=3D"font-style: normal; font-variant: normal; font-weight: normal; font-=
size: 7pt; line-height: normal; font-family: 'Times New Roman'; ">&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><!--[endif]-->ospfv3-interface-operation {<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo1">
<!--[if !supportLists]--><span style=3D"font-family:&quot;Courier New&quot;=
"><span style=3D"mso-list:Ignore">o<span style=3D"font-style: normal; font-=
variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; =
font-family: 'Times New Roman'; ">&nbsp;&nbsp;
</span></span></span><!--[endif]-->uses interface-config<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo1">
<!--[if !supportLists]--><span style=3D"font-family:&quot;Courier New&quot;=
"><span style=3D"mso-list:Ignore">o<span style=3D"font-style: normal; font-=
variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; =
font-family: 'Times New Roman'; ">&nbsp;&nbsp;
</span></span></span><!--[endif]-->uses ospf-common-interface-operation<o:p=
></o:p></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo1">
<!--[if !supportLists]--><span style=3D"font-family:&quot;Courier New&quot;=
"><span style=3D"mso-list:Ignore">o<span style=3D"font-style: normal; font-=
variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; =
font-family: 'Times New Roman'; ">&nbsp;&nbsp;
</span></span></span><!--[endif]-->leaf dr {<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:108.0pt;text-indent:-18.=
0pt;mso-list:l0 level3 lfo1">
<!--[if !supportLists]--><span style=3D"font-family:Wingdings"><span style=
=3D"mso-list:Ignore">=A7<span style=3D"font-style: normal; font-variant: no=
rmal; font-weight: normal; font-size: 7pt; line-height: normal; font-family=
: 'Times New Roman'; ">&nbsp;
</span></span></span><!--[endif]-->type if:interface-ref<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:108.0pt;text-indent:-18.=
0pt;mso-list:l0 level3 lfo1">
<!--[if !supportLists]--><span style=3D"font-family:Wingdings"><span style=
=3D"mso-list:Ignore">=A7<span style=3D"font-style: normal; font-variant: no=
rmal; font-weight: normal; font-size: 7pt; line-height: normal; font-family=
: 'Times New Roman'; ">&nbsp;
</span></span></span><!--[endif]-->description: <o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:144.0pt;text-indent:-18.=
0pt;mso-list:l0 level4 lfo1">
<!--[if !supportLists]--><span style=3D""><span style=3D"mso-list:Ignore">=
=B7<span style=3D"font-style: normal; font-variant: normal; font-weight: no=
rmal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman'; =
">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><!--[endif]-->&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&quot;The remote interface ID used by the Designated Ro=
uter on<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:144.0pt;text-indent:-18.=
0pt;mso-list:l0 level4 lfo1">
<!--[if !supportLists]--><span style=3D""><span style=3D"mso-list:Ignore">=
=B7<span style=3D"font-style: normal; font-variant: normal; font-weight: no=
rmal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman'; =
">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><!--[endif]-->&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;this link.&nbsp; This is the interface index of the int=
erface local to the DR.&quot;;<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo1">
<!--[if !supportLists]--><span style=3D"font-family:&quot;Courier New&quot;=
"><span style=3D"mso-list:Ignore">o<span style=3D"font-style: normal; font-=
variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; =
font-family: 'Times New Roman'; ">&nbsp;&nbsp;
</span></span></span><!--[endif]-->etc<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo1"><!--[if !supportLists]--><span style=3D"mso-list:Ignore">-<span st=
yle=3D"font-style: normal; font-variant: normal; font-weight: normal; font-=
size: 7pt; line-height: normal; font-family: 'Times New Roman'; ">&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><!--[endif]-->ospfv2-interface-operation {<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo1">
<!--[if !supportLists]--><span style=3D"font-family:&quot;Courier New&quot;=
"><span style=3D"mso-list:Ignore">o<span style=3D"font-style: normal; font-=
variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; =
font-family: 'Times New Roman'; ">&nbsp;&nbsp;
</span></span></span><!--[endif]-->uses interface-config<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo1">
<!--[if !supportLists]--><span style=3D"font-family:&quot;Courier New&quot;=
"><span style=3D"mso-list:Ignore">o<span style=3D"font-style: normal; font-=
variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; =
font-family: 'Times New Roman'; ">&nbsp;&nbsp;
</span></span></span><!--[endif]-->uses ospf-common-interface-operation<o:p=
></o:p></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo1">
<!--[if !supportLists]--><span style=3D"font-family:&quot;Courier New&quot;=
"><span style=3D"mso-list:Ignore">o<span style=3D"font-style: normal; font-=
variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; =
font-family: 'Times New Roman'; ">&nbsp;&nbsp;
</span></span></span><!--[endif]-->leaf dr {<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:108.0pt;text-indent:-18.=
0pt;mso-list:l0 level3 lfo1">
<!--[if !supportLists]--><span style=3D"font-family:Wingdings"><span style=
=3D"mso-list:Ignore">=A7<span style=3D"font-style: normal; font-variant: no=
rmal; font-weight: normal; font-size: 7pt; line-height: normal; font-family=
: 'Times New Roman'; ">&nbsp;
</span></span></span><!--[endif]-->&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;type inet:ipv4-address;<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:108.0pt;text-indent:-18.=
0pt;mso-list:l0 level3 lfo1">
<!--[if !supportLists]--><span style=3D"font-family:Wingdings"><span style=
=3D"mso-list:Ignore">=A7<span style=3D"font-style: normal; font-variant: no=
rmal; font-weight: normal; font-size: 7pt; line-height: normal; font-family=
: 'Times New Roman'; ">&nbsp;
</span></span></span><!--[endif]-->&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;description &quot;Designated Router (DR) IP address.&quot;;<o=
:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo1">
<!--[if !supportLists]--><span style=3D"font-family:&quot;Courier New&quot;=
"><span style=3D"mso-list:Ignore">o<span style=3D"font-style: normal; font-=
variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; =
font-family: 'Times New Roman'; ">&nbsp;&nbsp;
</span></span></span><!--[endif]-->etc.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Regards<o:p></o:p></p>
<p class=3D"MsoNormal">Alan Davey<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</div>
</div>
</span>
</body>
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From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
To: "Acee Lindem (acee)" <acee@cisco.com>
Thread-Topic: [OSPF] More Comments on OSPF S-BFD Discriminator
Thread-Index: AQHRX4CVRGRf7e6ISkyrMJZ6tz0da58cmAUAgAAGoYA=
Date: Thu, 4 Feb 2016 19:47:45 +0000
Message-ID: <D055B8DB-8D78-4CEC-8E7F-90E9BD6E0A47@cisco.com>
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Subject: Re: [OSPF] More Comments on OSPF S-BFD Discriminator
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Hi, Acee,

> On Feb 4, 2016, at 2:24 PM, Acee Lindem (acee) <acee@cisco.com> wrote:
>=20
> Hi Carlos,
>=20
> From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com =
<mailto:cpignata@cisco.com>>
> Date: Thursday, February 4, 2016 at 2:16 PM
> To: Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>
> Cc: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com =
<mailto:ginsberg@cisco.com>>, Manav Bhatia <manavbhatia@gmail.com =
<mailto:manavbhatia@gmail.com>>, =
"draft-ietf-ospf-sbfd-discriminator@ietf.org =
<mailto:draft-ietf-ospf-sbfd-discriminator@ietf.org>" =
<draft-ietf-ospf-sbfd-discriminator@ietf.org =
<mailto:draft-ietf-ospf-sbfd-discriminator@ietf.org>>, OSPF WG List =
<ospf@ietf.org <mailto:ospf@ietf.org>>
> Subject: Re: [OSPF] More Comments on OSPF S-BFD Discriminator
>=20
> Hi, Acee,
>=20
> Following up on your note below regarding =
draft-ietf-ospf-sbfd-discriminator, could you request publication and =
send this document to the IESG?
>=20
> Has the document been updated with the proposed text? It hasn=E2=80=99t =
been modified since Sept 24, 2015.
>=20

Yes. The only text modification proposed and to be implemented was done =
here:
=
https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discriminator-0=
2.txt =
<https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discriminator-=
02.txt>

I do not believe there was anything else pending. Do you mean something =
else?

Thanks!

Carlos.

> Thanks,
> Acee
>=20
>=20
> [BTW, its sibling document on ISIS is already in IESG ballot.]
>=20
> Thanks!
>=20
> =E2=80=94 Carlos.
>=20
>> On Nov 11, 2015, at 4:16 PM, Acee Lindem (acee) <acee@cisco.com =
<mailto:acee@cisco.com>> wrote:
>>=20
>> I was more concerned about the consumer of the information than the =
IGPs. I did look at base S-BFD draft and I agree this unspecified. =
Let=E2=80=99s go forward than with the proposed text and I will request =
publication.
>>=20
>> Thanks,
>> Acee
>>=20
>>=20
>=20


--Apple-Mail=_DC75998D-13DA-425B-B565-BF2BE8E86B66
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	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">Hi, Acee,<div class=3D""><br class=3D""><div><blockquote =
type=3D"cite" class=3D""><div class=3D"">On Feb 4, 2016, at 2:24 PM, =
Acee Lindem (acee) &lt;<a href=3D"mailto:acee@cisco.com" =
class=3D"">acee@cisco.com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D"">

<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-8" =
class=3D"">

<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; font-size: 14px; font-family: =
Calibri, sans-serif;" class=3D"">
<div class=3D"">Hi Carlos,&nbsp;</div>
<div class=3D""><br class=3D"">
</div>
<span id=3D"OLK_SRC_BODY_SECTION" class=3D"">
<div style=3D"font-family: Calibri; font-size: 11pt; text-align: left; =
border-width: 1pt medium medium; border-style: solid none none; padding: =
3pt 0in 0in; border-top-color: rgb(181, 196, 223);" class=3D"">
<span style=3D"font-weight:bold" class=3D"">From: </span>"Carlos =
Pignataro (cpignata)" &lt;<a href=3D"mailto:cpignata@cisco.com" =
class=3D"">cpignata@cisco.com</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Date: </span>Thursday, =
February 4, 2016 at 2:16 PM<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">To: </span>Acee Lindem =
&lt;<a href=3D"mailto:acee@cisco.com" class=3D"">acee@cisco.com</a>&gt;<br=
 class=3D"">
<span style=3D"font-weight:bold" class=3D"">Cc: </span>"Les Ginsberg =
(ginsberg)" &lt;<a href=3D"mailto:ginsberg@cisco.com" =
class=3D"">ginsberg@cisco.com</a>&gt;, Manav Bhatia &lt;<a =
href=3D"mailto:manavbhatia@gmail.com" =
class=3D"">manavbhatia@gmail.com</a>&gt;, "<a =
href=3D"mailto:draft-ietf-ospf-sbfd-discriminator@ietf.org" =
class=3D"">draft-ietf-ospf-sbfd-discriminator@ietf.org</a>"
 &lt;<a href=3D"mailto:draft-ietf-ospf-sbfd-discriminator@ietf.org" =
class=3D"">draft-ietf-ospf-sbfd-discriminator@ietf.org</a>&gt;, OSPF WG =
List &lt;<a href=3D"mailto:ospf@ietf.org" =
class=3D"">ospf@ietf.org</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Subject: </span>Re: [OSPF] =
More Comments on OSPF S-BFD Discriminator<br class=3D"">
</div>
<div class=3D""><br class=3D"">
</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;" =
class=3D"">
<div class=3D"">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space;" class=3D"">
Hi, Acee,
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Following up on your note below regarding =
draft-ietf-ospf-sbfd-discriminator, could you request publication and =
send this document to the IESG?</div>
</div>
</div>
</blockquote>
</span>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Has the document been updated with the proposed text? It =
hasn=E2=80=99t been modified since Sept 24, 2015.&nbsp;</div>
<div class=3D""><br class=3D""></div></div></div></blockquote><div><br =
class=3D""></div><div>Yes. The only text modification proposed and to be =
implemented was done here:</div><div><a =
href=3D"https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discrim=
inator-02.txt" =
class=3D"">https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-disc=
riminator-02.txt</a></div><div><br class=3D""></div><div>I do not =
believe there was anything else pending. Do you mean something =
else?</div><div><br class=3D""></div><div>Thanks!</div><div><br =
class=3D""></div><div>Carlos.</div><br class=3D""><blockquote =
type=3D"cite" class=3D""><div class=3D""><div style=3D"word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space; font-size: 14px; font-family: Calibri, sans-serif;" =
class=3D""><div class=3D"">
</div>
<div class=3D"">Thanks,</div>
<div class=3D"">Acee</div>
<div class=3D""><br class=3D"">
</div>
<span id=3D"OLK_SRC_BODY_SECTION" class=3D"">
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" =
style=3D"BORDER-LEFT: #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;" =
class=3D"">
<div class=3D"">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space;" class=3D"">
<div class=3D""><br class=3D"">
</div>
<div class=3D"">[BTW, its sibling document on ISIS is already in IESG =
ballot.]</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Thanks!</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">=E2=80=94 Carlos.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">On Nov 11, 2015, at 4:16 PM, Acee Lindem (acee) &lt;<a =
href=3D"mailto:acee@cisco.com" class=3D"">acee@cisco.com</a>&gt; =
wrote:</div>
<br class=3D"Apple-interchange-newline">
<div class=3D"">
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D"">
I was more concerned about the consumer of the information than the =
IGPs. I did look at base S-BFD draft and I agree this unspecified. =
Let=E2=80=99s go forward than with the proposed text and I will request =
publication.&nbsp;</div>
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D"">
<br class=3D"">
</div>
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D"">
Thanks,</div>
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D"">
Acee&nbsp;</div>
<div style=3D"font-family: Calibri, sans-serif; font-size: 14px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D"">
<br class=3D"">
</div>
<br class=3D"Apple-interchange-newline">
</div>
</blockquote>
</div>
<br class=3D"">
</div>
</div>
</blockquote>
</span>
</div>

</div></blockquote></div><br class=3D""></div></body></html>=

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References: <D252E730.385E8%acee@cisco.com> <CAG1kdojiU6fzn7XYSSdpfabxMDUQYvbgNNRCjZbraJKq2+WwJQ@mail.gmail.com> <D2668656.3CED2%acee@cisco.com> <c3caff28c3d243b99e523be8bc64719f@XCH-ALN-001.cisco.com> <D2669DC6.3CF08%acee@cisco.com> <8ef4f51407804a91950ab126277368a6@XCH-ALN-001.cisco.com> <D2691731.3D460%acee@cisco.com> <DBFC89CC-221C-42C8-8A11-E0E5A49170EC@cisco.com> <D2D90F1A.4B992%acee@cisco.com> <D055B8DB-8D78-4CEC-8E7F-90E9BD6E0A47@cisco.com>
Date: Fri, 5 Feb 2016 08:23:44 +0530
Message-ID: <CAG1kdohexHAJBRas53K7YB+U3yE_Nhy5FGd-n4vmr47dNMbU6A@mail.gmail.com>
From: Manav Bhatia <manavbhatia@gmail.com>
To: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
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Archived-At: <http://mailarchive.ietf.org/arch/msg/ospf/ZhxAqnRfRyCnyWi1n4bNRBgzKVI>
Cc: "draft-ietf-ospf-sbfd-discriminator@ietf.org" <draft-ietf-ospf-sbfd-discriminator@ietf.org>, OSPF WG List <ospf@ietf.org>
Subject: Re: [OSPF] More Comments on OSPF S-BFD Discriminator
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Hi Carlos,

I think we need to add the following in the current version:

=E2=80=9CWhen multiple S-BFD discriminators are advertised how a given
discriminator is mapped to a specific use case is out of scope for this
document.=E2=80=9D

I dont have the xml with me that i can update. Can you do it if you have
one with you?

Cheers, Manav

On Fri, Feb 5, 2016 at 1:17 AM, Carlos Pignataro (cpignata) <
cpignata@cisco.com> wrote:

> Hi, Acee,
>
> On Feb 4, 2016, at 2:24 PM, Acee Lindem (acee) <acee@cisco.com> wrote:
>
> Hi Carlos,
>
> From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
> Date: Thursday, February 4, 2016 at 2:16 PM
> To: Acee Lindem <acee@cisco.com>
> Cc: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, Manav Bhatia <
> manavbhatia@gmail.com>, "draft-ietf-ospf-sbfd-discriminator@ietf.org" <
> draft-ietf-ospf-sbfd-discriminator@ietf.org>, OSPF WG List <ospf@ietf.org=
>
> Subject: Re: [OSPF] More Comments on OSPF S-BFD Discriminator
>
> Hi, Acee,
>
> Following up on your note below regarding
> draft-ietf-ospf-sbfd-discriminator, could you request publication and sen=
d
> this document to the IESG?
>
>
> Has the document been updated with the proposed text? It hasn=E2=80=99t b=
een
> modified since Sept 24, 2015.
>
>
> Yes. The only text modification proposed and to be implemented was done
> here:
>
> https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discriminator-=
02.txt
>
> I do not believe there was anything else pending. Do you mean something
> else?
>
> Thanks!
>
> Carlos.
>
> Thanks,
> Acee
>
>
> [BTW, its sibling document on ISIS is already in IESG ballot.]
>
> Thanks!
>
> =E2=80=94 Carlos.
>
> On Nov 11, 2015, at 4:16 PM, Acee Lindem (acee) <acee@cisco.com> wrote:
>
> I was more concerned about the consumer of the information than the IGPs.
> I did look at base S-BFD draft and I agree this unspecified. Let=E2=80=99=
s go
> forward than with the proposed text and I will request publication.
>
> Thanks,
> Acee
>
>
>
>
>

--001a11422c00a3c0a0052afcf5bf
Content-Type: text/html; charset=UTF-8
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<div dir=3D"ltr">Hi Carlos,<div><br></div><div>I think we need to add the f=
ollowing in the current version:</div><div><br></div>=E2=80=9CWhen multiple=
 S-BFD discriminators are advertised how a given discriminator is mapped to=
 a specific use case is out of scope for this document.=E2=80=9D<div><br></=
div><div>I dont have the xml with me that i can update. Can you do it if yo=
u have one with you?</div><div><br></div><div>Cheers, Manav</div></div><div=
 class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Fri, Feb 5, 2016 a=
t 1:17 AM, Carlos Pignataro (cpignata) <span dir=3D"ltr">&lt;<a href=3D"mai=
lto:cpignata@cisco.com" target=3D"_blank">cpignata@cisco.com</a>&gt;</span>=
 wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bor=
der-left:1px #ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-wor=
d">Hi, Acee,<div><br><div><span class=3D""><blockquote type=3D"cite"><div>O=
n Feb 4, 2016, at 2:24 PM, Acee Lindem (acee) &lt;<a href=3D"mailto:acee@ci=
sco.com" target=3D"_blank">acee@cisco.com</a>&gt; wrote:</div><br><div>



<div style=3D"word-wrap:break-word;font-size:14px;font-family:Calibri,sans-=
serif">
<div>Hi Carlos,=C2=A0</div>
<div><br>
</div>
<span>
<div style=3D"font-family:Calibri;font-size:11pt;text-align:left;border-wid=
th:1pt medium medium;border-style:solid none none;padding:3pt 0in 0in;borde=
r-top-color:rgb(181,196,223)">
<span style=3D"font-weight:bold">From: </span>&quot;Carlos Pignataro (cpign=
ata)&quot; &lt;<a href=3D"mailto:cpignata@cisco.com" target=3D"_blank">cpig=
nata@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Thursday, February 4, 2016 at=
 2:16 PM<br>
<span style=3D"font-weight:bold">To: </span>Acee Lindem &lt;<a href=3D"mail=
to:acee@cisco.com" target=3D"_blank">acee@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Cc: </span>&quot;Les Ginsberg (ginsberg)&q=
uot; &lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@c=
isco.com</a>&gt;, Manav Bhatia &lt;<a href=3D"mailto:manavbhatia@gmail.com"=
 target=3D"_blank">manavbhatia@gmail.com</a>&gt;, &quot;<a href=3D"mailto:d=
raft-ietf-ospf-sbfd-discriminator@ietf.org" target=3D"_blank">draft-ietf-os=
pf-sbfd-discriminator@ietf.org</a>&quot;
 &lt;<a href=3D"mailto:draft-ietf-ospf-sbfd-discriminator@ietf.org" target=
=3D"_blank">draft-ietf-ospf-sbfd-discriminator@ietf.org</a>&gt;, OSPF WG Li=
st &lt;<a href=3D"mailto:ospf@ietf.org" target=3D"_blank">ospf@ietf.org</a>=
&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [OSPF] More Comments o=
n OSPF S-BFD Discriminator<br>
</div>
<div><br>
</div>
<blockquote style=3D"BORDER-LEFT:#b5c4df 5 solid;PADDING:0 0 0 5;MARGIN:0 0=
 0 5">
<div>
<div style=3D"word-wrap:break-word">
Hi, Acee,
<div><br>
</div>
<div>Following up on your note below regarding draft-ietf-ospf-sbfd-discrim=
inator, could you request publication and send this document to the IESG?</=
div>
</div>
</div>
</blockquote>
</span>
<div><br>
</div>
<div>Has the document been updated with the proposed text? It hasn=E2=80=99=
t been modified since Sept 24, 2015.=C2=A0</div>
<div><br></div></div></div></blockquote><div><br></div></span><div>Yes. The=
 only text modification proposed and to be implemented was done here:</div>=
<div><a href=3D"https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-=
discriminator-02.txt" target=3D"_blank">https://tools.ietf.org/rfcdiff?url2=
=3Ddraft-ietf-ospf-sbfd-discriminator-02.txt</a></div><div><br></div><div>I=
 do not believe there was anything else pending. Do you mean something else=
?</div><div><br></div><div>Thanks!</div><span class=3D"HOEnZb"><font color=
=3D"#888888"><div><br></div><div>Carlos.</div></font></span><span class=3D"=
"><br><blockquote type=3D"cite"><div><div style=3D"word-wrap:break-word;fon=
t-size:14px;font-family:Calibri,sans-serif"><div>
</div>
<div>Thanks,</div>
<div>Acee</div>
<div><br>
</div>
<span>
<blockquote style=3D"BORDER-LEFT:#b5c4df 5 solid;PADDING:0 0 0 5;MARGIN:0 0=
 0 5">
<div>
<div style=3D"word-wrap:break-word">
<div><br>
</div>
<div>[BTW, its sibling document on ISIS is already in IESG ballot.]</div>
<div><br>
</div>
<div>Thanks!</div>
<div><br>
</div>
<div>=E2=80=94 Carlos.</div>
<div><br>
</div>
<div>
<blockquote type=3D"cite">
<div>On Nov 11, 2015, at 4:16 PM, Acee Lindem (acee) &lt;<a href=3D"mailto:=
acee@cisco.com" target=3D"_blank">acee@cisco.com</a>&gt; wrote:</div>
<br>
<div>
<div style=3D"font-family:Calibri,sans-serif;font-size:14px;font-style:norm=
al;font-variant:normal;font-weight:normal;letter-spacing:normal;text-align:=
start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0=
px">
I was more concerned about the consumer of the information than the IGPs. I=
 did look at base S-BFD draft and I agree this unspecified. Let=E2=80=99s g=
o forward than with the proposed text and I will request publication.=C2=A0=
</div>
<div style=3D"font-family:Calibri,sans-serif;font-size:14px;font-style:norm=
al;font-variant:normal;font-weight:normal;letter-spacing:normal;text-align:=
start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0=
px">
<br>
</div>
<div style=3D"font-family:Calibri,sans-serif;font-size:14px;font-style:norm=
al;font-variant:normal;font-weight:normal;letter-spacing:normal;text-align:=
start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0=
px">
Thanks,</div>
<div style=3D"font-family:Calibri,sans-serif;font-size:14px;font-style:norm=
al;font-variant:normal;font-weight:normal;letter-spacing:normal;text-align:=
start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0=
px">
Acee=C2=A0</div>
<div style=3D"font-family:Calibri,sans-serif;font-size:14px;font-style:norm=
al;font-variant:normal;font-weight:normal;letter-spacing:normal;text-align:=
start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0=
px">
<br>
</div>
<br>
</div>
</blockquote>
</div>
<br>
</div>
</div>
</blockquote>
</span>
</div>

</div></blockquote></span></div><br></div></div></blockquote></div><br></di=
v>

--001a11422c00a3c0a0052afcf5bf--


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From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
To: Manav Bhatia <manavbhatia@gmail.com>
Thread-Topic: [OSPF] More Comments on OSPF S-BFD Discriminator
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Thank you Manav! I remember now :-)

Done :-)

https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discriminator-03 =
<https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discriminator-03=
>

Thanks,

=E2=80=94 Carlos.

> On Feb 4, 2016, at 9:53 PM, Manav Bhatia <manavbhatia@gmail.com> =
wrote:
>=20
> Hi Carlos,
>=20
> I think we need to add the following in the current version:
>=20
> =E2=80=9CWhen multiple S-BFD discriminators are advertised how a given =
discriminator is mapped to a specific use case is out of scope for this =
document.=E2=80=9D
>=20
> I dont have the xml with me that i can update. Can you do it if you =
have one with you?
>=20
> Cheers, Manav
>=20
> On Fri, Feb 5, 2016 at 1:17 AM, Carlos Pignataro (cpignata) =
<cpignata@cisco.com <mailto:cpignata@cisco.com>> wrote:
> Hi, Acee,
>=20
>> On Feb 4, 2016, at 2:24 PM, Acee Lindem (acee) <acee@cisco.com =
<mailto:acee@cisco.com>> wrote:
>>=20
>> Hi Carlos,
>>=20
>> From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com =
<mailto:cpignata@cisco.com>>
>> Date: Thursday, February 4, 2016 at 2:16 PM
>> To: Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>
>> Cc: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com =
<mailto:ginsberg@cisco.com>>, Manav Bhatia <manavbhatia@gmail.com =
<mailto:manavbhatia@gmail.com>>, =
"draft-ietf-ospf-sbfd-discriminator@ietf.org =
<mailto:draft-ietf-ospf-sbfd-discriminator@ietf.org>" =
<draft-ietf-ospf-sbfd-discriminator@ietf.org =
<mailto:draft-ietf-ospf-sbfd-discriminator@ietf.org>>, OSPF WG List =
<ospf@ietf.org <mailto:ospf@ietf.org>>
>> Subject: Re: [OSPF] More Comments on OSPF S-BFD Discriminator
>>=20
>> Hi, Acee,
>>=20
>> Following up on your note below regarding =
draft-ietf-ospf-sbfd-discriminator, could you request publication and =
send this document to the IESG?
>>=20
>> Has the document been updated with the proposed text? It hasn=E2=80=99t=
 been modified since Sept 24, 2015.
>>=20
>=20
> Yes. The only text modification proposed and to be implemented was =
done here:
> =
https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discriminator-0=
2.txt =
<https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discriminator-=
02.txt>
>=20
> I do not believe there was anything else pending. Do you mean =
something else?
>=20
> Thanks!
>=20
> Carlos.
>=20
>> Thanks,
>> Acee
>>=20
>>=20
>> [BTW, its sibling document on ISIS is already in IESG ballot.]
>>=20
>> Thanks!
>>=20
>> =E2=80=94 Carlos.
>>=20
>>> On Nov 11, 2015, at 4:16 PM, Acee Lindem (acee) <acee@cisco.com =
<mailto:acee@cisco.com>> wrote:
>>>=20
>>> I was more concerned about the consumer of the information than the =
IGPs. I did look at base S-BFD draft and I agree this unspecified. =
Let=E2=80=99s go forward than with the proposed text and I will request =
publication.
>>>=20
>>> Thanks,
>>> Acee
>>>=20
>>>=20
>>=20
>=20
>=20


--Apple-Mail=_B2909AE8-9B5F-4F7A-9616-29A553D735A7
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html;
	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">Thank you Manav! I remember now :-)<div class=3D""><br =
class=3D""></div><div class=3D"">Done :-)</div><div class=3D""><br =
class=3D""></div><div class=3D""><a =
href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discrimin=
ator-03" =
class=3D"">https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discri=
minator-03</a></div><div class=3D""><br class=3D""></div><div =
class=3D"">Thanks,</div><div class=3D""><br class=3D""></div><div =
class=3D"">=E2=80=94 Carlos.</div><div class=3D""><br =
class=3D""><div><blockquote type=3D"cite" class=3D""><div class=3D"">On =
Feb 4, 2016, at 9:53 PM, Manav Bhatia &lt;<a =
href=3D"mailto:manavbhatia@gmail.com" =
class=3D"">manavbhatia@gmail.com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><meta =
http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-8" =
class=3D""><div dir=3D"ltr" class=3D"">Hi Carlos,<div class=3D""><br =
class=3D""></div><div class=3D"">I think we need to add the following in =
the current version:</div><div class=3D""><br class=3D""></div>=E2=80=9CWh=
en multiple S-BFD discriminators are advertised how a given =
discriminator is mapped to a specific use case is out of scope for this =
document.=E2=80=9D<div class=3D""><br class=3D""></div><div class=3D"">I =
dont have the xml with me that i can update. Can you do it if you have =
one with you?</div><div class=3D""><br class=3D""></div><div =
class=3D"">Cheers, Manav</div></div><div class=3D"gmail_extra"><br =
class=3D""><div class=3D"gmail_quote">On Fri, Feb 5, 2016 at 1:17 AM, =
Carlos Pignataro (cpignata) <span dir=3D"ltr" class=3D"">&lt;<a =
href=3D"mailto:cpignata@cisco.com" target=3D"_blank" =
class=3D"">cpignata@cisco.com</a>&gt;</span> wrote:<br =
class=3D""><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"><div =
style=3D"word-wrap:break-word" class=3D"">Hi, Acee,<div class=3D""><br =
class=3D""><div class=3D""><span class=3D""><blockquote type=3D"cite" =
class=3D""><div class=3D"">On Feb 4, 2016, at 2:24 PM, Acee Lindem =
(acee) &lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank" =
class=3D"">acee@cisco.com</a>&gt; wrote:</div><br class=3D""><div =
class=3D"">



<div =
style=3D"word-wrap:break-word;font-size:14px;font-family:Calibri,sans-seri=
f" class=3D"">
<div class=3D"">Hi Carlos,&nbsp;</div>
<div class=3D""><br class=3D"">
</div>
<span class=3D"">
<div =
style=3D"font-family:Calibri;font-size:11pt;text-align:left;border-width:1=
pt medium medium;border-style:solid none none;padding:3pt 0in =
0in;border-top-color:rgb(181,196,223)" class=3D"">
<span style=3D"font-weight:bold" class=3D"">From: </span>"Carlos =
Pignataro (cpignata)" &lt;<a href=3D"mailto:cpignata@cisco.com" =
target=3D"_blank" class=3D"">cpignata@cisco.com</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Date: </span>Thursday, =
February 4, 2016 at 2:16 PM<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">To: </span>Acee Lindem =
&lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank" =
class=3D"">acee@cisco.com</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Cc: </span>"Les Ginsberg =
(ginsberg)" &lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank" =
class=3D"">ginsberg@cisco.com</a>&gt;, Manav Bhatia &lt;<a =
href=3D"mailto:manavbhatia@gmail.com" target=3D"_blank" =
class=3D"">manavbhatia@gmail.com</a>&gt;, "<a =
href=3D"mailto:draft-ietf-ospf-sbfd-discriminator@ietf.org" =
target=3D"_blank" =
class=3D"">draft-ietf-ospf-sbfd-discriminator@ietf.org</a>"
 &lt;<a href=3D"mailto:draft-ietf-ospf-sbfd-discriminator@ietf.org" =
target=3D"_blank" =
class=3D"">draft-ietf-ospf-sbfd-discriminator@ietf.org</a>&gt;, OSPF WG =
List &lt;<a href=3D"mailto:ospf@ietf.org" target=3D"_blank" =
class=3D"">ospf@ietf.org</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Subject: </span>Re: [OSPF] =
More Comments on OSPF S-BFD Discriminator<br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<blockquote style=3D"BORDER-LEFT:#b5c4df 5 solid;PADDING:0 0 0 =
5;MARGIN:0 0 0 5" class=3D"">
<div class=3D"">
<div style=3D"word-wrap:break-word" class=3D"">
Hi, Acee,
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Following up on your note below regarding =
draft-ietf-ospf-sbfd-discriminator, could you request publication and =
send this document to the IESG?</div>
</div>
</div>
</blockquote>
</span>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Has the document been updated with the proposed text? It =
hasn=E2=80=99t been modified since Sept 24, 2015.&nbsp;</div>
<div class=3D""><br class=3D""></div></div></div></blockquote><div =
class=3D""><br class=3D""></div></span><div class=3D"">Yes. The only =
text modification proposed and to be implemented was done =
here:</div><div class=3D""><a =
href=3D"https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discrim=
inator-02.txt" target=3D"_blank" =
class=3D"">https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-disc=
riminator-02.txt</a></div><div class=3D""><br class=3D""></div><div =
class=3D"">I do not believe there was anything else pending. Do you mean =
something else?</div><div class=3D""><br class=3D""></div><div =
class=3D"">Thanks!</div><span class=3D"HOEnZb"><font color=3D"#888888" =
class=3D""><div class=3D""><br class=3D""></div><div =
class=3D"">Carlos.</div></font></span><span class=3D""><br =
class=3D""><blockquote type=3D"cite" class=3D""><div class=3D""><div =
style=3D"word-wrap:break-word;font-size:14px;font-family:Calibri,sans-seri=
f" class=3D""><div class=3D"">
</div>
<div class=3D"">Thanks,</div>
<div class=3D"">Acee</div>
<div class=3D""><br class=3D"">
</div>
<span class=3D"">
<blockquote style=3D"BORDER-LEFT:#b5c4df 5 solid;PADDING:0 0 0 =
5;MARGIN:0 0 0 5" class=3D"">
<div class=3D"">
<div style=3D"word-wrap:break-word" class=3D"">
<div class=3D""><br class=3D"">
</div>
<div class=3D"">[BTW, its sibling document on ISIS is already in IESG =
ballot.]</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Thanks!</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">=E2=80=94 Carlos.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">On Nov 11, 2015, at 4:16 PM, Acee Lindem (acee) &lt;<a =
href=3D"mailto:acee@cisco.com" target=3D"_blank" =
class=3D"">acee@cisco.com</a>&gt; wrote:</div>
<br class=3D"">
<div class=3D"">
<div =
style=3D"font-family:Calibri,sans-serif;font-size:14px;font-style:normal;f=
ont-variant:normal;font-weight:normal;letter-spacing:normal;text-align:sta=
rt;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px=
" class=3D"">
I was more concerned about the consumer of the information than the =
IGPs. I did look at base S-BFD draft and I agree this unspecified. =
Let=E2=80=99s go forward than with the proposed text and I will request =
publication.&nbsp;</div>
<div =
style=3D"font-family:Calibri,sans-serif;font-size:14px;font-style:normal;f=
ont-variant:normal;font-weight:normal;letter-spacing:normal;text-align:sta=
rt;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px=
" class=3D"">
<br class=3D"">
</div>
<div =
style=3D"font-family:Calibri,sans-serif;font-size:14px;font-style:normal;f=
ont-variant:normal;font-weight:normal;letter-spacing:normal;text-align:sta=
rt;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px=
" class=3D"">
Thanks,</div>
<div =
style=3D"font-family:Calibri,sans-serif;font-size:14px;font-style:normal;f=
ont-variant:normal;font-weight:normal;letter-spacing:normal;text-align:sta=
rt;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px=
" class=3D"">
Acee&nbsp;</div>
<div =
style=3D"font-family:Calibri,sans-serif;font-size:14px;font-style:normal;f=
ont-variant:normal;font-weight:normal;letter-spacing:normal;text-align:sta=
rt;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px=
" class=3D"">
<br class=3D"">
</div>
<br class=3D"">
</div>
</blockquote>
</div>
<br class=3D"">
</div>
</div>
</blockquote>
</span>
</div>

</div></blockquote></span></div><br =
class=3D""></div></div></blockquote></div><br class=3D""></div>
</div></blockquote></div><br class=3D""></div></body></html>=

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From: Shraddha Hegde <shraddha@juniper.net>
To: "Acee Lindem (acee)" <acee@cisco.com>, OSPF WG List <ospf@ietf.org>
Thread-Topic: [OSPF] WG Adoption Call for "OSPF Stub Neighbors"
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Subject: Re: [OSPF] WG Adoption Call for "OSPF Stub Neighbors"
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Hi,

I have a few concerns on the necessity of this draft.

1.  Necessity of protocol change
The draft proposes to add the default route as part of router LSA but it is=
 not clear why this is required.
The draft in sec 5.2 vaguely talks about without clarifying the real issue

"We are introducing a new type of default route with a local behavior.
   The current use of default route as type 3 or as type 5 cannot solve
   some of the use cases and more specifically in the Data center
   topologies."

If the spoke nodes are connecting only to the HUB (which is what hub and sp=
oke topology is)then there is no way spoke would be learning OSPF routes=20
from other than the HUB. It doesn't look necessary to advertise default rou=
tes in route LSAs

2. The draft doesn't talk about the other possible hub and spoke topologies=
 like hierarchical hub and spoke,
      Multiple interfaces connecting to one Hub, A group of spoke nodes con=
necting to hub etc.  There should be a section on topology
      Restrictions to identify what topologies this draft intends to suppor=
t.

3.  The draft proposes to advertise router-capability for this feature but =
it is not clear how this information is used.=20
      =20
4. The draft talks in-length about the normal LSA and modified LSA but it i=
s not clear how to distinguish between the two.

5. The document uses first person language in many places which is not appr=
opriate for an internet draft.

6. I am in agreement with Anton on the p2mp use case which is completely mi=
ssed from the draft

IMHO, the draft needs more work before being adopted by WG.


Rgds
Shraddha



-----Original Message-----
From: OSPF [mailto:ospf-bounces@ietf.org] On Behalf Of Acee Lindem (acee)
Sent: Tuesday, January 26, 2016 10:09 PM
To: OSPF WG List <ospf@ietf.org>
Subject: [OSPF] WG Adoption Call for "OSPF Stub Neighbors"

This draft was has gone through some refinements after being presented in H=
awaii and in Yokohama there was some support of this protocol extension.
Here is a URL for you convenience.

https://datatracker.ietf.org/doc/draft-raza-ospf-stub-neighbor/

Please indicate your support (or concerns) for adopting this as a WG Docume=
nt. The WG Adoption call will end in 2 weeks.

Thanks,
Acee


_______________________________________________
OSPF mailing list
OSPF@ietf.org
https://www.ietf.org/mailman/listinfo/ospf


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From: "Acee Lindem (acee)" <acee@cisco.com>
To: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>, Manav Bhatia <manavbhatia@gmail.com>
Thread-Topic: [OSPF] More Comments on OSPF S-BFD Discriminator
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Date: Fri, 5 Feb 2016 13:00:02 +0000
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From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
To: "Acee Lindem (acee)" <acee@cisco.com>
Thread-Topic: [OSPF] More Comments on OSPF S-BFD Discriminator
Thread-Index: AQHRX4CVRGRf7e6ISkyrMJZ6tz0da58cmAUAgAAGoYCAAHcEAIAACy0AgACeOQCAABUagA==
Date: Fri, 5 Feb 2016 14:15:33 +0000
Message-ID: <EF2E19CF-DAEF-4E13-BE5F-55A1EA986D3D@cisco.com>
References: <D252E730.385E8%acee@cisco.com> <CAG1kdojiU6fzn7XYSSdpfabxMDUQYvbgNNRCjZbraJKq2+WwJQ@mail.gmail.com> <D2668656.3CED2%acee@cisco.com> <c3caff28c3d243b99e523be8bc64719f@XCH-ALN-001.cisco.com> <D2669DC6.3CF08%acee@cisco.com> <8ef4f51407804a91950ab126277368a6@XCH-ALN-001.cisco.com> <D2691731.3D460%acee@cisco.com> <DBFC89CC-221C-42C8-8A11-E0E5A49170EC@cisco.com> <D2D90F1A.4B992%acee@cisco.com> <D055B8DB-8D78-4CEC-8E7F-90E9BD6E0A47@cisco.com> <CAG1kdohexHAJBRas53K7YB+U3yE_Nhy5FGd-n4vmr47dNMbU6A@mail.gmail.com> <D35900BF-2CD6-4FFB-B403-49C1210B7547@cisco.com> <D2DA067F.4BADD%acee@cisco.com>
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Cc: "draft-ietf-ospf-sbfd-discriminator@ietf.org" <draft-ietf-ospf-sbfd-discriminator@ietf.org>, OSPF WG List <ospf@ietf.org>
Subject: Re: [OSPF] More Comments on OSPF S-BFD Discriminator
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Thanks Acee. You were right. Text added now and rev++ posted.

Thanks,

=E2=80=94 Carlos.

> On Feb 5, 2016, at 8:00 AM, Acee Lindem (acee) <acee@cisco.com> wrote:
>=20
> Carlos, Manav,
>  I remember now as well - this is the text I was referring to after =
the discussion including Les.
> Thanks,
> Acee
>=20
> From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com =
<mailto:cpignata@cisco.com>>
> Date: Thursday, February 4, 2016 at 10:33 PM
> To: Manav Bhatia <manavbhatia@gmail.com =
<mailto:manavbhatia@gmail.com>>
> Cc: Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>, "Les =
Ginsberg (ginsberg)" <ginsberg@cisco.com <mailto:ginsberg@cisco.com>>, =
"draft-ietf-ospf-sbfd-discriminator@ietf.org =
<mailto:draft-ietf-ospf-sbfd-discriminator@ietf.org>" =
<draft-ietf-ospf-sbfd-discriminator@ietf.org =
<mailto:draft-ietf-ospf-sbfd-discriminator@ietf.org>>, OSPF WG List =
<ospf@ietf.org <mailto:ospf@ietf.org>>
> Subject: Re: [OSPF] More Comments on OSPF S-BFD Discriminator
>=20
> Thank you Manav! I remember now :-)
>=20
> Done :-)
>=20
> =
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discriminator-03 =
<https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discriminator-03=
>
>=20
> Thanks,
>=20
> =E2=80=94 Carlos.
>=20
>> On Feb 4, 2016, at 9:53 PM, Manav Bhatia <manavbhatia@gmail.com =
<mailto:manavbhatia@gmail.com>> wrote:
>>=20
>> Hi Carlos,
>>=20
>> I think we need to add the following in the current version:
>>=20
>> =E2=80=9CWhen multiple S-BFD discriminators are advertised how a =
given discriminator is mapped to a specific use case is out of scope for =
this document.=E2=80=9D
>>=20
>> I dont have the xml with me that i can update. Can you do it if you =
have one with you?
>>=20
>> Cheers, Manav
>>=20
>> On Fri, Feb 5, 2016 at 1:17 AM, Carlos Pignataro (cpignata) =
<cpignata@cisco.com <mailto:cpignata@cisco.com>> wrote:
>> Hi, Acee,
>>=20
>>> On Feb 4, 2016, at 2:24 PM, Acee Lindem (acee) <acee@cisco.com =
<mailto:acee@cisco.com>> wrote:
>>>=20
>>> Hi Carlos,
>>>=20
>>> From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com =
<mailto:cpignata@cisco.com>>
>>> Date: Thursday, February 4, 2016 at 2:16 PM
>>> To: Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>
>>> Cc: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com =
<mailto:ginsberg@cisco.com>>, Manav Bhatia <manavbhatia@gmail.com =
<mailto:manavbhatia@gmail.com>>, =
"draft-ietf-ospf-sbfd-discriminator@ietf.org =
<mailto:draft-ietf-ospf-sbfd-discriminator@ietf.org>" =
<draft-ietf-ospf-sbfd-discriminator@ietf.org =
<mailto:draft-ietf-ospf-sbfd-discriminator@ietf.org>>, OSPF WG List =
<ospf@ietf.org <mailto:ospf@ietf.org>>
>>> Subject: Re: [OSPF] More Comments on OSPF S-BFD Discriminator
>>>=20
>>> Hi, Acee,
>>>=20
>>> Following up on your note below regarding =
draft-ietf-ospf-sbfd-discriminator, could you request publication and =
send this document to the IESG?
>>>=20
>>> Has the document been updated with the proposed text? It hasn=E2=80=99=
t been modified since Sept 24, 2015.
>>>=20
>>=20
>> Yes. The only text modification proposed and to be implemented was =
done here:
>> =
https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discriminator-0=
2.txt =
<https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discriminator-=
02.txt>
>>=20
>> I do not believe there was anything else pending. Do you mean =
something else?
>>=20
>> Thanks!
>>=20
>> Carlos.
>>=20
>>> Thanks,
>>> Acee
>>>=20
>>>=20
>>> [BTW, its sibling document on ISIS is already in IESG ballot.]
>>>=20
>>> Thanks!
>>>=20
>>> =E2=80=94 Carlos.
>>>=20
>>>> On Nov 11, 2015, at 4:16 PM, Acee Lindem (acee) <acee@cisco.com =
<mailto:acee@cisco.com>> wrote:
>>>>=20
>>>> I was more concerned about the consumer of the information than the =
IGPs. I did look at base S-BFD draft and I agree this unspecified. =
Let=E2=80=99s go forward than with the proposed text and I will request =
publication.
>>>>=20
>>>> Thanks,
>>>> Acee
>>>>=20
>>>>=20
>>>=20
>>=20
>>=20
>=20


--Apple-Mail=_0CFFA11C-8C52-4F48-981A-D17546FEDE8D
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	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">Thanks Acee. You were right. Text added now and rev++ =
posted.<div class=3D""><br class=3D""></div><div =
class=3D"">Thanks,</div><div class=3D""><br class=3D""></div><div =
class=3D"">=E2=80=94 Carlos.</div><div class=3D""><br =
class=3D""><div><blockquote type=3D"cite" class=3D""><div class=3D"">On =
Feb 5, 2016, at 8:00 AM, Acee Lindem (acee) &lt;<a =
href=3D"mailto:acee@cisco.com" class=3D"">acee@cisco.com</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D"">

<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-8" =
class=3D"">

<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; font-size: 14px; font-family: =
Calibri, sans-serif;" class=3D"">
<div class=3D"">Carlos, Manav,&nbsp;</div>
<div class=3D"">&nbsp;I remember now as well - this is the text I was =
referring to after the discussion including Les.&nbsp;</div>
<div class=3D"">Thanks,</div>
<div class=3D"">Acee&nbsp;</div>
<div class=3D""><br class=3D"">
</div>
<span id=3D"OLK_SRC_BODY_SECTION" class=3D"">
<div style=3D"font-family: Calibri; font-size: 11pt; text-align: left; =
border-width: 1pt medium medium; border-style: solid none none; padding: =
3pt 0in 0in; border-top-color: rgb(181, 196, 223);" class=3D"">
<span style=3D"font-weight:bold" class=3D"">From: </span>"Carlos =
Pignataro (cpignata)" &lt;<a href=3D"mailto:cpignata@cisco.com" =
class=3D"">cpignata@cisco.com</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Date: </span>Thursday, =
February 4, 2016 at 10:33 PM<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">To: </span>Manav Bhatia =
&lt;<a href=3D"mailto:manavbhatia@gmail.com" =
class=3D"">manavbhatia@gmail.com</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Cc: </span>Acee Lindem =
&lt;<a href=3D"mailto:acee@cisco.com" class=3D"">acee@cisco.com</a>&gt;, =
"Les Ginsberg (ginsberg)" &lt;<a href=3D"mailto:ginsberg@cisco.com" =
class=3D"">ginsberg@cisco.com</a>&gt;, "<a =
href=3D"mailto:draft-ietf-ospf-sbfd-discriminator@ietf.org" =
class=3D"">draft-ietf-ospf-sbfd-discriminator@ietf.org</a>"
 &lt;<a href=3D"mailto:draft-ietf-ospf-sbfd-discriminator@ietf.org" =
class=3D"">draft-ietf-ospf-sbfd-discriminator@ietf.org</a>&gt;, OSPF WG =
List &lt;<a href=3D"mailto:ospf@ietf.org" =
class=3D"">ospf@ietf.org</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Subject: </span>Re: [OSPF] =
More Comments on OSPF S-BFD Discriminator<br class=3D"">
</div>
<div class=3D""><br class=3D"">
</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;" =
class=3D"">
<div class=3D"">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space;" class=3D"">
Thank you Manav! I remember now :-)
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Done :-)</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><a =
href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discrimin=
ator-03" =
class=3D"">https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discri=
minator-03</a></div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Thanks,</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">=E2=80=94 Carlos.</div>
<div class=3D""><br class=3D"">
<div class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">On Feb 4, 2016, at 9:53 PM, Manav Bhatia &lt;<a =
href=3D"mailto:manavbhatia@gmail.com" =
class=3D"">manavbhatia@gmail.com</a>&gt; wrote:</div>
<br class=3D"Apple-interchange-newline">
<div class=3D"">
<div dir=3D"ltr" class=3D"">Hi Carlos,
<div class=3D""><br class=3D"">
</div>
<div class=3D"">I think we need to add the following in the current =
version:</div>
<div class=3D""><br class=3D"">
</div>
=E2=80=9CWhen multiple S-BFD discriminators are advertised how a given =
discriminator is mapped to a specific use case is out of scope for this =
document.=E2=80=9D
<div class=3D""><br class=3D"">
</div>
<div class=3D"">I dont have the xml with me that i can update. Can you =
do it if you have one with you?</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Cheers, Manav</div>
</div>
<div class=3D"gmail_extra"><br class=3D"">
<div class=3D"gmail_quote">On Fri, Feb 5, 2016 at 1:17 AM, Carlos =
Pignataro (cpignata)
<span dir=3D"ltr" class=3D"">&lt;<a href=3D"mailto:cpignata@cisco.com" =
target=3D"_blank" class=3D"">cpignata@cisco.com</a>&gt;</span> wrote:<br =
class=3D"">
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style=3D"word-wrap:break-word" class=3D"">Hi, Acee,
<div class=3D""><br class=3D"">
<div class=3D""><span class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">On Feb 4, 2016, at 2:24 PM, Acee Lindem (acee) &lt;<a =
href=3D"mailto:acee@cisco.com" target=3D"_blank" =
class=3D"">acee@cisco.com</a>&gt; wrote:</div>
<br class=3D"">
<div class=3D"">
<div =
style=3D"word-wrap:break-word;font-size:14px;font-family:Calibri,sans-seri=
f" class=3D"">
<div class=3D"">Hi Carlos,&nbsp;</div>
<div class=3D""><br class=3D"">
</div>
<span class=3D"">
<div =
style=3D"font-family:Calibri;font-size:11pt;text-align:left;border-width:1=
pt medium medium;border-style:solid none none;padding:3pt 0in =
0in;border-top-color:rgb(181,196,223)" class=3D"">
<span style=3D"font-weight:bold" class=3D"">From: </span>"Carlos =
Pignataro (cpignata)" &lt;<a href=3D"mailto:cpignata@cisco.com" =
target=3D"_blank" class=3D"">cpignata@cisco.com</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Date: </span>Thursday, =
February 4, 2016 at 2:16 PM<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">To: </span>Acee Lindem =
&lt;<a href=3D"mailto:acee@cisco.com" target=3D"_blank" =
class=3D"">acee@cisco.com</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Cc: </span>"Les Ginsberg =
(ginsberg)" &lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank" =
class=3D"">ginsberg@cisco.com</a>&gt;, Manav Bhatia &lt;<a =
href=3D"mailto:manavbhatia@gmail.com" target=3D"_blank" =
class=3D"">manavbhatia@gmail.com</a>&gt;,
 "<a href=3D"mailto:draft-ietf-ospf-sbfd-discriminator@ietf.org" =
target=3D"_blank" =
class=3D"">draft-ietf-ospf-sbfd-discriminator@ietf.org</a>" &lt;<a =
href=3D"mailto:draft-ietf-ospf-sbfd-discriminator@ietf.org" =
target=3D"_blank" =
class=3D"">draft-ietf-ospf-sbfd-discriminator@ietf.org</a>&gt;,
 OSPF WG List &lt;<a href=3D"mailto:ospf@ietf.org" target=3D"_blank" =
class=3D"">ospf@ietf.org</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Subject: </span>Re: [OSPF] =
More Comments on OSPF S-BFD Discriminator<br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<blockquote style=3D"BORDER-LEFT:#b5c4df 5 solid;PADDING:0 0 0 =
5;MARGIN:0 0 0 5" class=3D"">
<div class=3D"">
<div style=3D"word-wrap:break-word" class=3D"">Hi, Acee,
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Following up on your note below regarding =
draft-ietf-ospf-sbfd-discriminator, could you request publication and =
send this document to the IESG?</div>
</div>
</div>
</blockquote>
</span>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Has the document been updated with the proposed text? It =
hasn=E2=80=99t been modified since Sept 24, 2015.&nbsp;</div>
<div class=3D""><br class=3D"">
</div>
</div>
</div>
</blockquote>
<div class=3D""><br class=3D"">
</div>
</span>
<div class=3D"">Yes. The only text modification proposed and to be =
implemented was done here:</div>
<div class=3D""><a =
href=3D"https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-discrim=
inator-02.txt" target=3D"_blank" =
class=3D"">https://tools.ietf.org/rfcdiff?url2=3Ddraft-ietf-ospf-sbfd-disc=
riminator-02.txt</a></div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">I do not believe there was anything else pending. Do you =
mean something else?</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Thanks!</div>
<span class=3D"HOEnZb"><font color=3D"#888888" class=3D"">
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Carlos.</div>
</font></span><span class=3D""><br class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">
<div =
style=3D"word-wrap:break-word;font-size:14px;font-family:Calibri,sans-seri=
f" class=3D"">
<div class=3D""></div>
<div class=3D"">Thanks,</div>
<div class=3D"">Acee</div>
<div class=3D""><br class=3D"">
</div>
<span class=3D"">
<blockquote style=3D"BORDER-LEFT:#b5c4df 5 solid;PADDING:0 0 0 =
5;MARGIN:0 0 0 5" class=3D"">
<div class=3D"">
<div style=3D"word-wrap:break-word" class=3D"">
<div class=3D""><br class=3D"">
</div>
<div class=3D"">[BTW, its sibling document on ISIS is already in IESG =
ballot.]</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Thanks!</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">=E2=80=94 Carlos.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">On Nov 11, 2015, at 4:16 PM, Acee Lindem (acee) &lt;<a =
href=3D"mailto:acee@cisco.com" target=3D"_blank" =
class=3D"">acee@cisco.com</a>&gt; wrote:</div>
<br class=3D"">
<div class=3D"">
<div =
style=3D"font-family:Calibri,sans-serif;font-size:14px;font-style:normal;f=
ont-variant:normal;font-weight:normal;letter-spacing:normal;text-align:sta=
rt;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px=
" class=3D"">
I was more concerned about the consumer of the information than the =
IGPs. I did look at base S-BFD draft and I agree this unspecified. =
Let=E2=80=99s go forward than with the proposed text and I will request =
publication.&nbsp;</div>
<div =
style=3D"font-family:Calibri,sans-serif;font-size:14px;font-style:normal;f=
ont-variant:normal;font-weight:normal;letter-spacing:normal;text-align:sta=
rt;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px=
" class=3D"">
<br class=3D"">
</div>
<div =
style=3D"font-family:Calibri,sans-serif;font-size:14px;font-style:normal;f=
ont-variant:normal;font-weight:normal;letter-spacing:normal;text-align:sta=
rt;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px=
" class=3D"">
Thanks,</div>
<div =
style=3D"font-family:Calibri,sans-serif;font-size:14px;font-style:normal;f=
ont-variant:normal;font-weight:normal;letter-spacing:normal;text-align:sta=
rt;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px=
" class=3D"">
Acee&nbsp;</div>
<div =
style=3D"font-family:Calibri,sans-serif;font-size:14px;font-style:normal;f=
ont-variant:normal;font-weight:normal;letter-spacing:normal;text-align:sta=
rt;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px=
" class=3D"">
<br class=3D"">
</div>
<br class=3D"">
</div>
</blockquote>
</div>
<br class=3D"">
</div>
</div>
</blockquote>
</span></div>
</div>
</blockquote>
</span></div>
<br class=3D"">
</div>
</div>
</blockquote>
</div>
<br class=3D"">
</div>
</div>
</blockquote>
</div>
<br class=3D"">
</div>
</div>
</div>
</blockquote>
</span>
</div>

</div></blockquote></div><br class=3D""></div></body></html>=

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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: "Acee Lindem (acee)" <acee@cisco.com>, "Carlos Pignataro (cpignata)" <cpignata@cisco.com>, Manav Bhatia <manavbhatia@gmail.com>
Thread-Topic: [OSPF] More Comments on OSPF S-BFD Discriminator
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Date: Fri, 5 Feb 2016 14:47:52 +0000
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
Thread-Topic: [OSPF] More Comments on OSPF S-BFD Discriminator
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References: <D252E730.385E8%acee@cisco.com> <CAG1kdojiU6fzn7XYSSdpfabxMDUQYvbgNNRCjZbraJKq2+WwJQ@mail.gmail.com> <D2668656.3CED2%acee@cisco.com> <c3caff28c3d243b99e523be8bc64719f@XCH-ALN-001.cisco.com> <D2669DC6.3CF08%acee@cisco.com> <8ef4f51407804a91950ab126277368a6@XCH-ALN-001.cisco.com> <D2691731.3D460%acee@cisco.com> <DBFC89CC-221C-42C8-8A11-E0E5A49170EC@cisco.com> <D2D90F1A.4B992%acee@cisco.com> <D055B8DB-8D78-4CEC-8E7F-90E9BD6E0A47@cisco.com> <CAG1kdohexHAJBRas53K7YB+U3yE_Nhy5FGd-n4vmr47dNMbU6A@mail.gmail.com> <D35900BF-2CD6-4FFB-B403-49C1210B7547@cisco.com> <D2DA067F.4BADD%acee@cisco.com> <EF2E19CF-DAEF-4E13-BE5F-55A1EA986D3D@cisco.com>
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Subject: Re: [OSPF] More Comments on OSPF S-BFD Discriminator
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, "Carlos Pignataro (cpignata)" <cpignata@cisco.com>, Manav Bhatia <manavbhatia@gmail.com>
Thread-Topic: [OSPF] More Comments on OSPF S-BFD Discriminator
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Date: Fri, 5 Feb 2016 15:52:03 +0000
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References: <D252E730.385E8%acee@cisco.com> <CAG1kdojiU6fzn7XYSSdpfabxMDUQYvbgNNRCjZbraJKq2+WwJQ@mail.gmail.com> <D2668656.3CED2%acee@cisco.com> <c3caff28c3d243b99e523be8bc64719f@XCH-ALN-001.cisco.com> <D2669DC6.3CF08%acee@cisco.com> <8ef4f51407804a91950ab126277368a6@XCH-ALN-001.cisco.com> <D2691731.3D460%acee@cisco.com> <DBFC89CC-221C-42C8-8A11-E0E5A49170EC@cisco.com> <D2D90F1A.4B992%acee@cisco.com> <D055B8DB-8D78-4CEC-8E7F-90E9BD6E0A47@cisco.com> <CAG1kdohexHAJBRas53K7YB+U3yE_Nhy5FGd-n4vmr47dNMbU6A@mail.gmail.com> <D35900BF-2CD6-4FFB-B403-49C1210B7547@cisco.com> <D2DA067F.4BADD%acee@cisco.com> <8380eaf9fc1d4fb993d55cf3a95cc4bc@XCH-ALN-001.cisco.com>
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Subject: Re: [OSPF] More Comments on OSPF S-BFD Discriminator
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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: "Acee Lindem (acee)" <acee@cisco.com>, "Carlos Pignataro (cpignata)" <cpignata@cisco.com>, Manav Bhatia <manavbhatia@gmail.com>
Thread-Topic: [OSPF] More Comments on OSPF S-BFD Discriminator
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Date: Fri, 5 Feb 2016 16:00:06 +0000
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References: <D252E730.385E8%acee@cisco.com> <CAG1kdojiU6fzn7XYSSdpfabxMDUQYvbgNNRCjZbraJKq2+WwJQ@mail.gmail.com> <D2668656.3CED2%acee@cisco.com> <c3caff28c3d243b99e523be8bc64719f@XCH-ALN-001.cisco.com> <D2669DC6.3CF08%acee@cisco.com> <8ef4f51407804a91950ab126277368a6@XCH-ALN-001.cisco.com> <D2691731.3D460%acee@cisco.com> <DBFC89CC-221C-42C8-8A11-E0E5A49170EC@cisco.com> <D2D90F1A.4B992%acee@cisco.com> <D055B8DB-8D78-4CEC-8E7F-90E9BD6E0A47@cisco.com> <CAG1kdohexHAJBRas53K7YB+U3yE_Nhy5FGd-n4vmr47dNMbU6A@mail.gmail.com> <D35900BF-2CD6-4FFB-B403-49C1210B7547@cisco.com> <D2DA067F.4BADD%acee@cisco.com> <8380eaf9fc1d4fb993d55cf3a95cc4bc@XCH-ALN-001.cisco.com> <D2DA2F10.4BB3B%acee@cisco.com>
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Subject: Re: [OSPF] More Comments on OSPF S-BFD Discriminator
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--_000_0154264405f54697befe72915d18616fXCHALN001ciscocom_--


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From: "Alvaro Retana (aretana)" <aretana@cisco.com>
To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>, "Acee Lindem (acee)" <acee@cisco.com>, "Carlos Pignataro (cpignata)" <cpignata@cisco.com>, "Manav Bhatia" <manavbhatia@gmail.com>
Thread-Topic: [OSPF] More Comments on OSPF S-BFD Discriminator
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Date: Fri, 5 Feb 2016 16:34:56 +0000
Message-ID: <D2DA3549.10D5FA%aretana@cisco.com>
References: <D252E730.385E8%acee@cisco.com> <CAG1kdojiU6fzn7XYSSdpfabxMDUQYvbgNNRCjZbraJKq2+WwJQ@mail.gmail.com> <D2668656.3CED2%acee@cisco.com> <c3caff28c3d243b99e523be8bc64719f@XCH-ALN-001.cisco.com> <D2669DC6.3CF08%acee@cisco.com> <8ef4f51407804a91950ab126277368a6@XCH-ALN-001.cisco.com> <D2691731.3D460%acee@cisco.com> <DBFC89CC-221C-42C8-8A11-E0E5A49170EC@cisco.com> <D2D90F1A.4B992%acee@cisco.com> <D055B8DB-8D78-4CEC-8E7F-90E9BD6E0A47@cisco.com> <CAG1kdohexHAJBRas53K7YB+U3yE_Nhy5FGd-n4vmr47dNMbU6A@mail.gmail.com> <D35900BF-2CD6-4FFB-B403-49C1210B7547@cisco.com> <D2DA067F.4BADD%acee@cisco.com> <8380eaf9fc1d4fb993d55cf3a95cc4bc@XCH-ALN-001.cisco.com> <D2DA2F10.4BB3B%acee@cisco.com> <0154264405f54697befe72915d18616f@XCH-ALN-001.cisco.com>
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Cc: OSPF WG List <ospf@ietf.org>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>, "draft-ietf-ospf-sbfd-discriminator@ietf.org" <draft-ietf-ospf-sbfd-discriminator@ietf.org>, "bfd-chairs@ietf.org" <bfd-chairs@ietf.org>, "isis-wg@ietf.org list" <isis-wg@ietf.org>
Subject: Re: [OSPF] More Comments on OSPF S-BFD Discriminator
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--_000_D2DA354910D5FAaretanaciscocom_
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

On 2/5/16, 11:00 AM, "OSPF on behalf of Les Ginsberg (ginsberg)" <ospf-boun=
ces@ietf.org<mailto:ospf-bounces@ietf.org> on behalf of ginsberg@cisco.com<=
mailto:ginsberg@cisco.com>> wrote:

Les:

Hi!

There is no discussion ongoing nor any action item for the authors that I a=
m aware of.
I believe this state exists because we were waiting for discussion on the S=
-BFD base draft to be resolved.

If ADs require any additional updates they need to tell us - otherwise I th=
ink this draft should move forward as is.

As you well know, what is holding the ISIS draft is not work required from =
you (the authors of that document) -- at least not to clear the DISCUSS.

I am waiting for the BFD WG chairs to call consensus on the discussion rela=
ted to the mapping, and on the authors of the base S-BFD document to provid=
e an update reflecting that decision.  It may have not been clear to everyo=
ne what needed to happen as a result of the DISCUSS - I sent reminders to t=
he chairs/authors a few minutes ago.

Thanks for not letting us forget about making progress..

Alvaro.

--_000_D2DA354910D5FAaretanaciscocom_
Content-Type: text/html; charset="iso-8859-1"
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Content-Transfer-Encoding: quoted-printable

<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</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>On 2/5/16, 11:00 AM, &quot;OSPF on behalf of Les Ginsberg (ginsberg)&q=
uot; &lt;<a href=3D"mailto:ospf-bounces@ietf.org">ospf-bounces@ietf.org</a>=
 on behalf of
<a href=3D"mailto:ginsberg@cisco.com">ginsberg@cisco.com</a>&gt; wrote:</di=
v>
<div><br>
</div>
<div>Les:</div>
<div><br>
</div>
<div>Hi!</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<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;">
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif; color: rgb(0, 0, 0); font-style: nor=
mal; font-variant: normal; font-weight: normal; letter-spacing: normal; orp=
hans: auto; text-align: start; text-indent: 0px; text-transform: none; whit=
e-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width=
: 0px;">
<span style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: rg=
b(31, 73, 125);">There is no discussion ongoing nor any action item for the=
 authors that I am aware of.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif; color: rgb(0, 0, 0); font-style: nor=
mal; font-variant: normal; font-weight: normal; letter-spacing: normal; orp=
hans: auto; text-align: start; text-indent: 0px; text-transform: none; whit=
e-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width=
: 0px;">
<span style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: rg=
b(31, 73, 125);">I believe this state exists because we were waiting for di=
scussion on the S-BFD base draft to be resolved.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif; color: rgb(0, 0, 0); font-style: nor=
mal; font-variant: normal; font-weight: normal; letter-spacing: normal; orp=
hans: auto; text-align: start; text-indent: 0px; text-transform: none; whit=
e-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width=
: 0px;">
<span style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: rg=
b(31, 73, 125);"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif; color: rgb(0, 0, 0); font-style: nor=
mal; font-variant: normal; font-weight: normal; letter-spacing: normal; orp=
hans: auto; text-align: start; text-indent: 0px; text-transform: none; whit=
e-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width=
: 0px;">
<span style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: rg=
b(31, 73, 125);">If ADs require any additional updates they need to tell us=
 &#8211; otherwise I think this draft should move forward as is.<o:p></o:p>=
</span></p>
</blockquote>
</span>
<div><br>
</div>
<div>As you well know, what is holding the ISIS draft is not work required =
from you (the authors of that document) -- at least not to clear the DISCUS=
S.</div>
<div><br>
</div>
<div>I am waiting for the BFD WG chairs to call consensus on the discussion=
 related to the mapping,
<span style=3D"font-weight: bold;">and</span>&nbsp;on the authors of the ba=
se S-BFD document to provide an update reflecting that decision. &nbsp;It m=
ay have not been clear to everyone what needed to happen as a result of the=
 DISCUSS &#8212; I sent reminders to the chairs/authors
 a few minutes ago.</div>
<div><br>
</div>
<div>Thanks for not letting us forget about making progress..</div>
<div><br>
</div>
<div>Alvaro.</div>
</body>
</html>

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From: "Acee Lindem (acee)" <acee@cisco.com>
To: "Acee Lindem (acee)" <acee@cisco.com>, "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
Thread-Topic: [OSPF] More Comments on OSPF S-BFD Discriminator
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From: "Russ White" <7riw77@gmail.com>
To: "'Acee Lindem \(acee\)'" <acee@cisco.com>, "'OSPF WG List'" <ospf@ietf.org>
Date: Mon, 8 Feb 2016 00:28:30 -0500
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Subject: [OSPF] Comments for "OSPF Stub Neighbors"
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Y'all --

Some thoughts on the current OSPF stub neighbors draft. Some are grammar,
later ones are content.

==
With the growing size of an OSPF-network, most large networks are now
deploying OSPF in large hub and spoke topologies. Also in lot of cases L3
routing would be extended to Top of rack or even to a host running virtual
machines. In any case these remote devices constitute a stub point in an
OSPF network. These devices although being part of OSPF network will never
be a transit point and thus do not need any topology information of the area
nor do they require optimal routing calculations.

This is too much text that's not needed. Something simpler would do, such as
--

OSPF is often deployed on large scale hub and spoke or spine and leaf
topologies. In both of these topologies, a large number of routers running
OSPF will never transit traffic, and hence could be declared stub routers. 

==
The spoke router in the case of a hub and spoke (or a host running OSPF)
only need default route to the rest of the network, but they do need to send
information about the connected network in the local site. In case of hosts
they need to advertise routes in the virtual machines.

This feels like too much text as well. Maybe --

OSPF stub routers only need to receive a default route to the rest of the
network, and they need to send information about connected subnets or hosts
(in the case of a virtual machine or hypervisor running OSPF).

I actually don't know that I would agree with the idea that an OSPF stub
only needs a default route -- in fact, you want a subset of routes rather
than a defualt only, much like partials in BGP peering. The point is that
the stub doesn't need any topology information, and it also doesn't need
full reachability information. I'll have more comments on this in later
sections.

==
OSPF as network protocol was designed for an environment where routers were
of similar capabilities. To protect the larger network, area hierarchy was
introduced. Network was typically broken up into a backbone area and several
subordinate areas. This breakup of the topology into areas serves multiple
purposes As OSPF has become pervasive protocol in the enterprise network it
needs to evolve for large hub and spoke setups, these are typical retail
environments. In a retail setup typical remote branch router does not have
enough capacity to become part of a larger area, even if we break the
network in large number of smaller areas. A remote router in one retail
store does not need to have routes to all the router in other retail store
that are part of its area setup.

Too much explanation... There's no real tie between flooding domains
(areas), "protecting the larger network," and the concept being presented
here -- it just feels like random information. Something like this might
help tie things together better --

OSPF networks are broken up into flooding domains, called areas, to manage
the amount of control plane state carried to any individual router. Within a
flooding domain, each router has a synchronized database containing full
reachability and topology information within the area. At the area border,
topology information is automatically removed from the information
advertised by an OSPF router, and reachability information can be removed
through route aggregation. This draft proposes removing all topology
information transmitted to OSPF stub routers, and allowing the network
administrator fine grained control over reachability information advertised
to an OSPF stub router.

==
Also increasing the number of areas on ABR can burden the ABR, this is due
to the creation of large number of summary LSA. Although this can be handled
by creating the areas as stub with no summary. Even by creating smaller
sized areas with stub no summary, it does not completely eliminate the
problem of having unnecessary information from the prospective of intra
area.

I think what this is trying to say is -- "if you set up each remote as its
own area, you incur a penalty in OSPF ABR processing." I would either
introduce the alternate solution more fully, or just remove this. IMHO, it's
not needed, so I would choose the simpler path and just remove it.

==
With the advent of virtualized hosts, hosts are now advertising an
increasing number of new virtual machine routes. These prefixes need to be
advertised by a router that is connected to the host. Traditionally the host
would be connected to the router via a shared link between the two (host and
router). The host is often sourcing subnets that are not connected to the
common subnet between the host and routers. However, the hosts (or spokes)
themselves just need a default route from the router(or hub) to reach rest
of the network. The solutions using current features of the protocol are not
scalable. The overhead of protocol info and flooding of large number of
unnecessary information to low-end routers caps the number of spokes on a
hub.

The problem is made more urgent because of VMs and hypervisors -- ack.
Again, though, either explain the problem completely, or leave it out.
Again, IMHO, this isn't needed, so I would leave it out. It's simpler in the
long run.

==
We presuppose familiarity with the contents of [RFC2328].

I don't think this is needed, myself...

==
Incremental deployment

The introduction to this section feels like it could be simplified a good
bit. Maybe something like --

The changes proposed in this draft impact the hub router in a hub and spoke
or spine and leaf topology. The hub router is not required to be an area
border router (ABR). From the perspective of the hub router's neighbors, the
hub router will appear to be a normal OSPF router running an unmodified
version of OSPF.

Or something like that... ??

BTW, I'm not certain you're going to actually get away with not changing the
remotes, but more on that in a moment. :-)

==
Vendors have implemented LSA filtering function on per neighbors basis
specially for the purpose of scaling large full mesh environments. 

This section seems a little muddled to me... :-( First, there are two types
of filtering here; one that blocks flooding across a particular link similar
to a DR/DIS, the other which blocks the advertisment of specific
reachability information in a type 3 (the inverse of route leaking in
IS-IS). I think you're talking about the first one here, but I don't really
understand how it applies to the problem at hand. If it's really a hub and
spoke sort of topology, then each remote is only going to receive one copy
of each LSA. If it's spine and leaf, then you can block flooding, but it's a
bit harder than it seems, I think. You either need to have the one hub that
is flooding towards the remotes list all the hubs that are connected to the
remote, or you need to play some other game. For the remotes towards the
hubs, there are a number of solutions here -- look at the old MANET work for
something that's already been implemented in this space.

==
4.1, 4.2, and 4.3 don't seem to be necessary to me... ??

==
5.1 Stub Neighbor Overview

I'm a little confused by the special default route type. Specifically --

Why not just send a type 3 with only a default route, or only the subset of
routes you want the stub to know about? Maybe this has been discussed
before, but building a new TLV type seems like a lot of work for a limited
range of functionality that could be provided in a way the protocol already
knows about.

How are you going to prevent the stub from reflooding the LSA it receives
from the hub to any other device? Given the draft specifically says "the
stub router doesn't need to be changed," there doesn't seem to be any way to
solve this. You can assume the stub will only be connected to other modified
hub routers, but this seems like a pretty dangerous assumption.

What I think I'd do instead is introduce a new type 3 with a TTL. Then you
could put whatever you want in it, and be assured the information won't be
reflooded. Require the use of a tag for stub routers that don't support the
new TTL field, rather than relying on correct network topology
configuration. The point of control to prevent reflooding needs to be at the
stub router, rather than the hub router.

==
I have more comments for the later sections, but I'd like to clear these up
before moving into the rest of the draft.

HTH

:-)

Russ


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To: Huaimo Chen <huaimo.chen@huawei.com>, OSPF WG List <ospf@ietf.org>, "draft-ietf-ospf-ttz@ietf.org" <draft-ietf-ospf-ttz@ietf.org>
Thread-Topic: [OSPF] Working Group Last Call for "OSPF Topology Transparent Zone"
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From: Huaimo Chen <huaimo.chen@huawei.com>
To: "Acee Lindem (acee)" <acee@cisco.com>, OSPF WG List <ospf@ietf.org>, "draft-ietf-ospf-ttz@ietf.org" <draft-ietf-ospf-ttz@ietf.org>
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From nobody Tue Feb 16 09:24:44 2016
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From: Julien Meuric <julien.meuric@orange.com>
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Subject: [OSPF] Comment on draft-ppsenak-ospf-te-link-attr-reuse-01
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Hi Pete,

I believe the new text in the section 5 of the aforementioned I-D is a 
nice improvement for the specification (thank you Chris).

However, the current version still says "TE will use the information in 
the TE Opaque LSA and the non-TE applications will use the information 
in the OSPFv2 Extended Link Opaque LSA". Then remote LFA joins the 
party, and I wonder if it is a "TE application" or not. As "there is no 
IETF specification documenting" what would strictly fall under "TE 
application" or "non-TE application", and even no real need to define a 
strict boundary, I consider that sentence as over-specification and 
suggest to jusst drop it. That would let applications themselves look 
for that information where relevant/specified, whether they 
philosophically feel like being TE or not.

What is more, I really think that the current wording  is too loose in 
"it is expected that the information in these LSA [sic] would be 
identical". I do not see the drawback of having full alignment of values 
in case of duplication, but I see the operational risk of nightmare in 
case they are not. As a result, I suggest to rephrase into: "If the same 
link attribute is advertised in both LSAs, the information in these LSAs 
MUST be identical."

Cheers,

Julien


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Subject: Re: [OSPF] Comment on draft-ppsenak-ospf-te-link-attr-reuse-01
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Hi Julien,

On 2/16/16 18:24 , Julien Meuric wrote:
> Hi Pete,
>
> I believe the new text in the section 5 of the aforementioned I-D is a
> nice improvement for the specification (thank you Chris).
>
> However, the current version still says "TE will use the information in
> the TE Opaque LSA and the non-TE applications will use the information
> in the OSPFv2 Extended Link Opaque LSA". Then remote LFA joins the
> party, and I wonder if it is a "TE application" or not.

clearly it is not.

> As "there is no
> IETF specification documenting" what would strictly fall under "TE
> application" or "non-TE application", and even no real need to define a
> strict boundary, I consider that sentence as over-specification and
> suggest to jusst drop it.

LFA has nothing to do with TE, it's obvious.

And yes, we need a strict boundary between what is TE related and what 
is not. If we don't define it, then every implementation can choose what 
LSA to use, which would lead to the interoperability problems. The 
purpose of this draft is to define a single mechanism to advertise link 
attributes for non-TE applications.

> That would let applications themselves look
> for that information where relevant/specified, whether they
> philosophically feel like being TE or not.

TE application MUST only look at the TE Opaque LSA - that is specified 
already.

Non-TE application SHOULD look at Extended Link LSA - that is what we 
want to specify in this draft.

>
> What is more, I really think that the current wording  is too loose in
> "it is expected that the information in these LSA [sic] would be
> identical". I do not see the drawback of having full alignment of values
> in case of duplication, but I see the operational risk of nightmare in
> case they are not. As a result, I suggest to rephrase into: "If the same
> link attribute is advertised in both LSAs, the information in these LSAs
> MUST be identical."

given the OSPF protocol operation above can not be guaranteed. LSAs 
arrive asynchronously and there can be intervals during which the 
consistency of the information between two different LSAs can not be 
guaranteed.

thanks,
Peter

>
> Cheers,
>
> Julien
>
> .
>


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From: Alan Davey <Alan.Davey@metaswitch.com>
To: "Derek Man-Kit Yeung (myeung)" <myeung@cisco.com>, "draft-ietf-ospf-yang@ietf.org" <draft-ietf-ospf-yang@ietf.org>
Thread-Topic: draft-ietf-ospf-yang-03 questions and doubts
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Subject: Re: [OSPF] draft-ietf-ospf-yang-03 questions and doubts
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Hi Derek

Thank you for your response, and apologies for the delay in getting back to=
 you.  Have you considered distinct ospfv3-interface-operation and ospfv2-i=
nterface-operation?  Or even distinct "container ospfv2" and "container osp=
fv3"?

There are a number of differences between the Interface Data Structure defi=
ned in RFC2328 and in RFC5340.  In particular, the following.  Do you plan =
to add all of these differences to the interface-operation grouping?


-          DR and BDR identification.

o   As you wrote, section 9 of RFC2328 specifies that the Interface Data St=
ructure includes the Router ID and IP address for the DR and BDR.

o   Section 4.1.2 of RFC5340 does not specify how to identify the DR and BD=
R, but given the OSPFv3 protocol, it seems reasonable that the router ID an=
d interface ID would be stored.

-          Section 4.1.2 of RFC5340 specifies a number of objects that do n=
ot appear in the RFC2328 version of the Interface Data Structure, as follow=
s.

o   Interface ID.

o   Instance ID.

o   List of LSAs with link-local scope.

o   List of IPv6 prefixes configured for the attached link.

Regards
Alan

From: Derek Man-Kit Yeung (myeung) [mailto:myeung@cisco.com]
Sent: 04 February 2016 19:39
To: Alan Davey <Alan.Davey@metaswitch.com>; draft-ietf-ospf-yang@ietf.org
Cc: ospf@ietf.org
Subject: Re: draft-ietf-ospf-yang-03 questions and doubts

Hi Alan,

Thanks for the comments.
As you have pointed out, there are OSPFv3 specific fields missing in the mo=
del now. For example, instance ID and interface ID. We will add them in the=
 next update.

As for the DR, DR is conceptually one of the neighbor.
In OSPFv2, the DR's router ID and IP address are used in protocol operation=
.
While in OSPFv3, the DR's router ID and interface ID are used in protocol o=
peration.
According to OSPFv2 and OSPFv3 RFC, the interface structure should keep bot=
h the DR's router ID and IP address.

We have the following in the current model.

  grouping interface-operation {
    leaf dr {
      type inet:ipv4-address;
      description "Designated Router (DR) IP address.";
    }
  }
  grouping neighbor-operation {
    leaf dr {
      type yang:dotted-quad;
      description
        "Designated Router.";
    }
  }

To better match the RFC and accommodate both OSPFv2 and OSPFv3 in a cleaner=
 way, we plan to make the following changes.

  grouping interface-operation {
    leaf dr-router-id {
      type yang:dotted-quad;
      description
        "Designated Router (DR) router ID.";
    }
    leaf dr-ip-address {
      type inet:ip-address;
      description "Designated Router (DR) IP address.";
    }
  }
  grouping neighbor-operation {
    leaf dr-router-id {
      type yang:dotted-quad;
      description
        "Neighbor's Designated Router (DR) router ID.";
    }
    leaf dr-ip-address {
      type inet:ip-address;
      description "Neighbor's Designated Router (DR) IP address.";
    }
  }

If one need the DR's interface ID in the OSPFv3 case, it could be found by =
locating the neighbor entry for the DR and get the interface ID (To be adde=
d) field there.

Comments welcome.

Thanks,
- Derek

From: Alan Davey <Alan.Davey@metaswitch.com<mailto:Alan.Davey@metaswitch.co=
m>>
Date: Tuesday, December 15, 2015 8:23 AM
To: "draft-ietf-ospf-yang@ietf.org<mailto:draft-ietf-ospf-yang@ietf.org>" <=
draft-ietf-ospf-yang@ietf.org<mailto:draft-ietf-ospf-yang@ietf.org>>
Cc: "ospf@ietf.org<mailto:ospf@ietf.org>" <ospf@ietf.org<mailto:ospf@ietf.o=
rg>>
Subject: draft-ietf-ospf-yang-03 questions and doubts

Folks

I have a doubt about draft-ietf-ospf-yang-03.  Please let me know your thou=
ghts on the following.

The text is OSPFv2-specific in places.  I think that it would be better to =
define separate top-level groupings and containers for OSPFv2 and OSPFv3 an=
d define common groupings and containers, where possible, that are used by =
both.

For example, grouping interface-operation contains the following, which is =
incorrect for OSPFv3.


-          leaf dr with type ipv4-address

-          leaf bdr with type ipv4-address.

I think that it would be better to define something along the following lin=
es.


-          ospfv3-interface-operation {

o   uses interface-config

o   uses ospf-common-interface-operation

o   leaf dr {

?  type if:interface-ref

?  description:

*                   "The remote interface ID used by the Designated Router =
on

*                   this link.  This is the interface index of the interfac=
e local to the DR.";

o   etc

-          ospfv2-interface-operation {

o   uses interface-config

o   uses ospf-common-interface-operation

o   leaf dr {

?           type inet:ipv4-address;

?           description "Designated Router (DR) IP address.";

o   etc.

Regards
Alan Davey


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</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext=3D"edit">
<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi Derek<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Thank you for your res=
ponse, and apologies for the delay in getting back to you.&nbsp; Have you c=
onsidered distinct ospfv3-interface-operation and ospfv2-interface-operatio=
n?&nbsp; Or even distinct &#8220;container ospfv2&#8221; and
 &#8220;container ospfv3&#8221;?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">There are a number of =
differences between the Interface Data Structure defined in RFC2328 and in =
RFC5340. &nbsp;In particular, the following.&nbsp; Do you plan to add all o=
f these differences to the interface-operation
 grouping?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo3"><![if !supportLists]><span style=3D"color:#1F497D"><span style=3D"=
mso-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">DR and BDR ide=
ntification.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo3">
<![if !supportLists]><span style=3D"font-family:&quot;Courier New&quot;;col=
or:#1F497D"><span style=3D"mso-list:Ignore">o<span style=3D"font:7.0pt &quo=
t;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">As you wrote, =
section 9 of RFC2328 specifies that the Interface Data Structure includes t=
he Router ID and IP address for the DR and BDR.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo3">
<![if !supportLists]><span style=3D"font-family:&quot;Courier New&quot;;col=
or:#1F497D"><span style=3D"mso-list:Ignore">o<span style=3D"font:7.0pt &quo=
t;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">Section 4.1.2 =
of RFC5340 does not specify how to identify the DR and BDR, but given the O=
SPFv3 protocol, it seems reasonable that the router ID and interface ID wou=
ld be stored.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo3"><![if !supportLists]><span style=3D"color:#1F497D"><span style=3D"=
mso-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">Section 4.1.2 =
of RFC5340 specifies a number of objects that do not appear in the RFC2328 =
version of the Interface Data Structure, as follows.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo3">
<![if !supportLists]><span style=3D"font-family:&quot;Courier New&quot;;col=
or:#1F497D"><span style=3D"mso-list:Ignore">o<span style=3D"font:7.0pt &quo=
t;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">Interface ID.<=
o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo3">
<![if !supportLists]><span style=3D"font-family:&quot;Courier New&quot;;col=
or:#1F497D"><span style=3D"mso-list:Ignore">o<span style=3D"font:7.0pt &quo=
t;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">Instance ID.<o=
:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo3">
<![if !supportLists]><span style=3D"font-family:&quot;Courier New&quot;;col=
or:#1F497D"><span style=3D"mso-list:Ignore">o<span style=3D"font:7.0pt &quo=
t;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">List of LSAs w=
ith link-local scope.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo3">
<![if !supportLists]><span style=3D"font-family:&quot;Courier New&quot;;col=
or:#1F497D"><span style=3D"mso-list:Ignore">o<span style=3D"font:7.0pt &quo=
t;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:#1F497D">List of IPv6 p=
refixes configured for the attached link.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Regards<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Alan<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></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 lang=3D"EN-US" style=3D"mso-fareast-languag=
e:EN-GB">From:</span></b><span lang=3D"EN-US" style=3D"mso-fareast-language=
:EN-GB"> Derek Man-Kit Yeung (myeung) [mailto:myeung@cisco.com]
<br>
<b>Sent:</b> 04 February 2016 19:39<br>
<b>To:</b> Alan Davey &lt;Alan.Davey@metaswitch.com&gt;; draft-ietf-ospf-ya=
ng@ietf.org<br>
<b>Cc:</b> ospf@ietf.org<br>
<b>Subject:</b> Re: draft-ietf-ospf-yang-03 questions and doubts<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;color:black">Hi Alan=
,</span><span style=3D"font-size:10.5pt;color:black;mso-fareast-language:EN=
-GB"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black"><o:p>&n=
bsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">Thanks =
for the comments.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">As you =
have pointed out, there are OSPFv3 specific fields missing in the model now=
. For example, instance ID and interface ID. We will add them in the next u=
pdate.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black"><o:p>&n=
bsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">As for =
the DR, DR is conceptually one of the neighbor.&nbsp;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">In OSPF=
v2, the DR's router ID and IP address are used in protocol operation.<o:p><=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">While i=
n OSPFv3, the DR's router ID and interface ID are used in protocol operatio=
n.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">Accordi=
ng to OSPFv2 and OSPFv3 RFC, the interface structure should keep both the D=
R's router ID and IP address.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black"><o:p>&n=
bsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">We have=
 the following in the current model.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black"><o:p>&n=
bsp;</o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
grouping interface-operation {<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; leaf dr {<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; &nbsp; type inet:ipv4-address;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; &nbsp; description &quot;Designated Router (DR) IP address.&quot;;<o=
:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; }<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
}<o:p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
grouping neighbor-operation {<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; leaf dr {<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; &nbsp; type yang:dotted-quad;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; &nbsp; description<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; &nbsp; &nbsp; &quot;Designated Router.&quot;;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; }<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
}<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black"><o:p>&n=
bsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">To bett=
er match the RFC and accommodate both OSPFv2 and OSPFv3 in a cleaner way, w=
e plan to make the following changes.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black"><o:p>&n=
bsp;</o:p></span></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
grouping interface-operation {<o:p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; leaf dr-router-id {<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; &nbsp; type yang:dotted-quad;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; &nbsp; description<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; &nbsp; &nbsp; &quot;Designated Router (DR) router ID.&quot;;<o:p></o=
:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; }<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; leaf dr-ip-address {<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; &nbsp; type inet:ip-address;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; &nbsp; description &quot;Designated Router (DR) IP address.&quot;;<o=
:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; }<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
}<o:p></o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
grouping neighbor-operation {<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; leaf dr-router-id {<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; &nbsp; type yang:dotted-quad;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; &nbsp; description<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; &nbsp; &nbsp; &quot;Neighbor's Designated Router (DR) router ID.&quo=
t;;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; }<o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; leaf dr-ip-address {<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; &nbsp; type inet:ip-address;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; &nbsp; description &quot;Neighbor's Designated Router (DR) IP addres=
s.&quot;;<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
&nbsp; }<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">&nbsp; =
}<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black"><o:p>&n=
bsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">If one =
need the DR's interface ID in the OSPFv3 case, it could be found by locatin=
g the neighbor entry for the DR and get the interface ID (To be added) fiel=
d there.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black"><o:p>&n=
bsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">Comment=
s welcome.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black"><o:p>&n=
bsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">Thanks,=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black">- Derek=
<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black"><o:p>&n=
bsp;</o:p></span></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"color:black">From: </span></b><spa=
n style=3D"color:black">Alan Davey &lt;<a href=3D"mailto:Alan.Davey@metaswi=
tch.com">Alan.Davey@metaswitch.com</a>&gt;<br>
<b>Date: </b>Tuesday, December 15, 2015 8:23 AM<br>
<b>To: </b>&quot;<a href=3D"mailto:draft-ietf-ospf-yang@ietf.org">draft-iet=
f-ospf-yang@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-ospf-yang@i=
etf.org">draft-ietf-ospf-yang@ietf.org</a>&gt;<br>
<b>Cc: </b>&quot;<a href=3D"mailto:ospf@ietf.org">ospf@ietf.org</a>&quot; &=
lt;<a href=3D"mailto:ospf@ietf.org">ospf@ietf.org</a>&gt;<br>
<b>Subject: </b>draft-ietf-ospf-yang-03 questions and doubts<o:p></o:p></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black"><o:p>&n=
bsp;</o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Folks<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"color:black">I have a doubt about dra=
ft-ietf-ospf-yang-03.&nbsp; Please let me know your thoughts on the followi=
ng.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"color:black">The text is OSPFv2-speci=
fic in places.&nbsp; I think that it would be better to define separate top=
-level groupings and containers for OSPFv2 and OSPFv3 and define common gro=
upings and containers, where possible, that
 are used by both.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"color:black">For example, grouping in=
terface-operation contains the following, which is incorrect for OSPFv3.<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<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"color:black"><span style=3D"ms=
o-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:black">leaf dr with typ=
e ipv4-address<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"color:black"><span style=3D"ms=
o-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:black">leaf bdr with ty=
pe ipv4-address.<o:p></o:p></span></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:black;mso-fare=
ast-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I think that it would be=
 better to define something along the following lines.<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<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"color:black"><span style=3D"ms=
o-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:black">ospfv3-interface=
-operation {<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l1 level2 lfo2">
<![if !supportLists]><span style=3D"font-family:&quot;Courier New&quot;;col=
or:black"><span style=3D"mso-list:Ignore">o<span style=3D"font:7.0pt &quot;=
Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:black">uses interface-c=
onfig<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l1 level2 lfo2">
<![if !supportLists]><span style=3D"font-family:&quot;Courier New&quot;;col=
or:black"><span style=3D"mso-list:Ignore">o<span style=3D"font:7.0pt &quot;=
Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:black">uses ospf-common=
-interface-operation<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l1 level2 lfo2">
<![if !supportLists]><span style=3D"font-family:&quot;Courier New&quot;;col=
or:black"><span style=3D"mso-list:Ignore">o<span style=3D"font:7.0pt &quot;=
Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:black">leaf dr {<o:p></=
o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:108.0pt;text-indent:-18.=
0pt;mso-list:l1 level3 lfo2">
<![if !supportLists]><span style=3D"font-family:Wingdings;color:black"><spa=
n style=3D"mso-list:Ignore">&sect;<span style=3D"font:7.0pt &quot;Times New=
 Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"color:black">type if:interfac=
e-ref<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:108.0pt;text-indent:-18.=
0pt;mso-list:l1 level3 lfo2">
<![if !supportLists]><span style=3D"font-family:Wingdings;color:black"><spa=
n style=3D"mso-list:Ignore">&sect;<span style=3D"font:7.0pt &quot;Times New=
 Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"color:black">description: <o:=
p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:144.0pt;text-indent:-18.=
0pt;mso-list:l1 level4 lfo2">
<![if !supportLists]><span style=3D"font-family:Symbol;color:black"><span s=
tyle=3D"mso-list:Ignore">&middot;<span style=3D"font:7.0pt &quot;Times New =
Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:black">&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&quot;The remote interface ID u=
sed by the Designated Router on<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:144.0pt;text-indent:-18.=
0pt;mso-list:l1 level4 lfo2">
<![if !supportLists]><span style=3D"font-family:Symbol;color:black"><span s=
tyle=3D"mso-list:Ignore">&middot;<span style=3D"font:7.0pt &quot;Times New =
Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:black">&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;this link.&nbsp; This is the in=
terface index of the interface local to the DR.&quot;;<o:p></o:p></span></p=
>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l1 level2 lfo2">
<![if !supportLists]><span style=3D"font-family:&quot;Courier New&quot;;col=
or:black"><span style=3D"mso-list:Ignore">o<span style=3D"font:7.0pt &quot;=
Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:black">etc<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"color:black"><span style=3D"ms=
o-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:black">ospfv2-interface=
-operation {<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l1 level2 lfo2">
<![if !supportLists]><span style=3D"font-family:&quot;Courier New&quot;;col=
or:black"><span style=3D"mso-list:Ignore">o<span style=3D"font:7.0pt &quot;=
Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:black">uses interface-c=
onfig<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l1 level2 lfo2">
<![if !supportLists]><span style=3D"font-family:&quot;Courier New&quot;;col=
or:black"><span style=3D"mso-list:Ignore">o<span style=3D"font:7.0pt &quot;=
Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:black">uses ospf-common=
-interface-operation<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l1 level2 lfo2">
<![if !supportLists]><span style=3D"font-family:&quot;Courier New&quot;;col=
or:black"><span style=3D"mso-list:Ignore">o<span style=3D"font:7.0pt &quot;=
Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:black">leaf dr {<o:p></=
o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:108.0pt;text-indent:-18.=
0pt;mso-list:l1 level3 lfo2">
<![if !supportLists]><span style=3D"font-family:Wingdings;color:black"><spa=
n style=3D"mso-list:Ignore">&sect;<span style=3D"font:7.0pt &quot;Times New=
 Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"color:black">&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;type inet:ipv4-address;<o:p></o:p></s=
pan></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:108.0pt;text-indent:-18.=
0pt;mso-list:l1 level3 lfo2">
<![if !supportLists]><span style=3D"font-family:Wingdings;color:black"><spa=
n style=3D"mso-list:Ignore">&sect;<span style=3D"font:7.0pt &quot;Times New=
 Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"color:black">&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;description &quot;Designated Router (=
DR) IP address.&quot;;<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l1 level2 lfo2">
<![if !supportLists]><span style=3D"font-family:&quot;Courier New&quot;;col=
or:black"><span style=3D"mso-list:Ignore">o<span style=3D"font:7.0pt &quot;=
Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span style=3D"color:black">etc.<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"color:black">Alan Davey<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"color:black">&nbsp;<o:p></o:p></span>=
</p>
</div>
</div>
</div>
</body>
</html>

--_000_CY1PR0201MB1066110895F4C141E7779015F9AF0CY1PR0201MB1066_--


From nobody Thu Feb 18 07:48:02 2016
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To: Peter Psenak <ppsenak@cisco.com>
References: <56C35B58.8080301@orange.com> <56C44A8E.7010300@cisco.com>
From: Julien Meuric <julien.meuric@orange.com>
Organization: Orange
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Date: Thu, 18 Feb 2016 16:47:57 +0100
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Subject: Re: [OSPF] Comment on draft-ppsenak-ospf-te-link-attr-reuse-01
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Hi Peter,

Feb. 17, 2016 - ppsenak@cisco.com:
> Hi Julien,
>
> On 2/16/16 18:24 , Julien Meuric wrote:
>> Hi Pete,
>>
>> I believe the new text in the section 5 of the aforementioned I-D is a
>> nice improvement for the specification (thank you Chris).
>>
>> However, the current version still says "TE will use the information in
>> the TE Opaque LSA and the non-TE applications will use the information
>> in the OSPFv2 Extended Link Opaque LSA". Then remote LFA joins the
>> party, and I wonder if it is a "TE application" or not.
>
> clearly it is not.

[JM] OK

>
>> As "there is no
>> IETF specification documenting" what would strictly fall under "TE
>> application" or "non-TE application", and even no real need to define a
>> strict boundary, I consider that sentence as over-specification and
>> suggest to jusst drop it.
>
> LFA has nothing to do with TE, it's obvious.

[JM] I tend to agree on that, though not fully on the "obvious".

>
> And yes, we need a strict boundary between what is TE related and what
> is not. If we don't define it, then every implementation can choose what
> LSA to use, which would lead to the interoperability problems. The
> purpose of this draft is to define a single mechanism to advertise link
> attributes for non-TE applications.

[JM] Yes, each application specification should state where among OSPF 
LSAs it gets these link parameters from. But it does not require to 
split application space between TE and non-TE:
- applications per se should not be concerned about that split, this is 
protocol-related and should be addressed at the end of the specification 
chain (i.e., "this parameters is to be used for...", not "this use case 
falls into category X");
- this is OSPF-specific: when considering IS-IS, this is not an issue;
- the LFA example already contradicts the rule you suggest, tempering 
the backward compatibility text could avoid this situation.

>
>> That would let applications themselves look
>> for that information where relevant/specified, whether they
>> philosophically feel like being TE or not.
>
> TE application MUST only look at the TE Opaque LSA - that is specified
> already.

[JM] I would be cautious on "only". E.g., RFC 7770 can be applicable, 
though not TE.

>
> Non-TE application SHOULD look at Extended Link LSA - that is what we
> want to specify in this draft.

[JM] I am still confused with this "TE/non-TE application" rough 
summary, but I think we could find an agreement by saying that opaque 
LSAs (including TE) are to be used by so-called "TE application", and 
that extended link LSA should be preferred by the others.

>
>>
>> What is more, I really think that the current wording  is too loose in
>> "it is expected that the information in these LSA [sic] would be
>> identical". I do not see the drawback of having full alignment of values
>> in case of duplication, but I see the operational risk of nightmare in
>> case they are not. As a result, I suggest to rephrase into: "If the same
>> link attribute is advertised in both LSAs, the information in these LSAs
>> MUST be identical."
>
> given the OSPF protocol operation above can not be guaranteed. LSAs
> arrive asynchronously and there can be intervals during which the
> consistency of the information between two different LSAs can not be
> guaranteed.

[JM] We fully agree on that. To make sure this is not creating an 
ambiguity, you may rephrase as:
"If the same link attribute is advertised in both LSAs, the information 
packed in these LSAs by advertising routers MUST be identical."

Thanks,

Julien

>
> thanks,
> Peter
>
>>
>> Cheers,
>>
>> Julien
>>
>> .
>>
>


From nobody Thu Feb 18 14:36:30 2016
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Subject: Re: [OSPF] Comment on draft-ppsenak-ospf-te-link-attr-reuse-01
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Hi Julien,

please see inline :(##PP)

On 2/18/16 16:47 , Julien Meuric wrote:
> Hi Peter,
>
> Feb. 17, 2016 - ppsenak@cisco.com:
>> Hi Julien,
>>
>> On 2/16/16 18:24 , Julien Meuric wrote:
>>> Hi Pete,
>>>
>>> I believe the new text in the section 5 of the aforementioned I-D is a
>>> nice improvement for the specification (thank you Chris).
>>>
>>> However, the current version still says "TE will use the information in
>>> the TE Opaque LSA and the non-TE applications will use the information
>>> in the OSPFv2 Extended Link Opaque LSA". Then remote LFA joins the
>>> party, and I wonder if it is a "TE application" or not.
>>
>> clearly it is not.
>
> [JM] OK
>
>>
>>> As "there is no
>>> IETF specification documenting" what would strictly fall under "TE
>>> application" or "non-TE application", and even no real need to define a
>>> strict boundary, I consider that sentence as over-specification and
>>> suggest to jusst drop it.
>>
>> LFA has nothing to do with TE, it's obvious.
>
> [JM] I tend to agree on that, though not fully on the "obvious".
>
>>
>> And yes, we need a strict boundary between what is TE related and what
>> is not. If we don't define it, then every implementation can choose what
>> LSA to use, which would lead to the interoperability problems. The
>> purpose of this draft is to define a single mechanism to advertise link
>> attributes for non-TE applications.
>
> [JM] Yes, each application specification should state where among OSPF

##PP
let me disagree. Applications do not decide which LSAs to use. It's the 
protocol extension that is made for an application and application needs 
to follow it. And for TE application it has been done by RFC3630.


> LSAs it gets these link parameters from. But it does not require to
> split application space between TE and non-TE:
> - applications per se should not be concerned about that split, this is
> protocol-related and should be addressed at the end of the specification
> chain (i.e., "this parameters is to be used for...", not "this use case
> falls into category X");
> - this is OSPF-specific: when considering IS-IS, this is not an issue;

##PP
well, let's not get into that discussion here.


> - the LFA example already contradicts the rule you suggest, tempering
> the backward compatibility text could avoid this situation.

##PP
the text we added in the Backward Compatibility is not meant to 
standardized the non standard behavior by any means.


>
>>
>>> That would let applications themselves look
>>> for that information where relevant/specified, whether they
>>> philosophically feel like being TE or not.
>>
>> TE application MUST only look at the TE Opaque LSA - that is specified
>> already.
>
> [JM] I would be cautious on "only". E.g., RFC 7770 can be applicable,
> though not TE.

##PP
I do not see what RFC 7770 has to do with link attributes. RFC7770 is 
about advertising optional router capabilities, which is completely 
orthogonal to this draft.


>
>>
>> Non-TE application SHOULD look at Extended Link LSA - that is what we
>> want to specify in this draft.
>
> [JM] I am still confused with this "TE/non-TE application" rough
> summary, but I think we could find an agreement by saying that opaque
> LSAs (including TE) are to be used by so-called "TE application", and
> that extended link LSA should be preferred by the others.

##PP
Extended Link LSA is an Opaque LSA as well. You need to specify which 
Opaque LSA is to be used by TE and which for the rest of apps.


>
>>
>>>
>>> What is more, I really think that the current wording  is too loose in
>>> "it is expected that the information in these LSA [sic] would be
>>> identical". I do not see the drawback of having full alignment of values
>>> in case of duplication, but I see the operational risk of nightmare in
>>> case they are not. As a result, I suggest to rephrase into: "If the same
>>> link attribute is advertised in both LSAs, the information in these LSAs
>>> MUST be identical."
>>
>> given the OSPF protocol operation above can not be guaranteed. LSAs
>> arrive asynchronously and there can be intervals during which the
>> consistency of the information between two different LSAs can not be
>> guaranteed.
>
> [JM] We fully agree on that. To make sure this is not creating an
> ambiguity, you may rephrase as:
> "If the same link attribute is advertised in both LSAs, the information
> packed in these LSAs by advertising routers MUST be identical."

##PP
I'm still not sure we want to enforce that even on the router that 
generates these. Different apps may use different values of certain link 
attribute. Take an SRLG as an example. You may have SRLG values on the 
link used only by GMPLS/optical plane. These values have meaning only in 
the context of the GMPLS/optical. You do not want LFA to use these 
values, because their meaning is different and irrelevant for LFA, you 
may define a different set of values used by LFA.

In general, by mandating the same values in both LSAs we are creating an 
unnecessary limitation that I'm not convinced about.

thanks,
Peter


>
> Thanks,
>
> Julien
>
>>
>> thanks,
>> Peter
>>
>>>
>>> Cheers,
>>>
>>> Julien
>>>
>>> .
>>>
>>
> .
>


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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Julien Meuric <julien.meuric@orange.com>, "Peter Psenak (ppsenak)" <ppsenak@cisco.com>
Thread-Topic: [OSPF] Comment on draft-ppsenak-ospf-te-link-attr-reuse-01
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Subject: Re: [OSPF] Comment on draft-ppsenak-ospf-te-link-attr-reuse-01
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To: "Acee Lindem (acee)" <acee@cisco.com>
References: <56C35B58.8080301@orange.com> <56C44A8E.7010300@cisco.com> <56C5E7AD.4060508@orange.com> <D2ECFDE3.4D725%acee@cisco.com>
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Subject: Re: [OSPF] Comment on draft-ppsenak-ospf-te-link-attr-reuse-01
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Hi Acee,

Feb. 20, 2016 - acee@cisco.com:
> Hi Julien,

[snip]

>>>> What is more, I really think that the current wording  is too loose in
>>>> "it is expected that the information in these LSA [sic] would be
>>>> identical". I do not see the drawback of having full alignment of
>>>> values
>>>> in case of duplication, but I see the operational risk of nightmare in
>>>> case they are not. As a result, I suggest to rephrase into: "If the
>>>> same
>>>> link attribute is advertised in both LSAs, the information in these
>>>> LSAs
>>>> MUST be identical."
>>>
>>> given the OSPF protocol operation above can not be guaranteed. LSAs
>>> arrive asynchronously and there can be intervals during which the
>>> consistency of the information between two different LSAs can not be
>>> guaranteed.
>>
>> [JM] We fully agree on that. To make sure this is not creating an
>> ambiguity, you may rephrase as:
>> "If the same link attribute is advertised in both LSAs, the information
>> packed in these LSAs by advertising routers MUST be identical."
>
> Are we sure on this? Today we can have an OSPF metric that is independent
> of the OSPF TE Metric - why wouldnâ€™t we want the same flexibility with
> SRLG?

[JM] From my perspective, I concur. Metrics are purely administrative 
parameters: it makes sense to allow operators to use different routing 
decision between SPF and TE. Conversely, SRLGs are supposed to abstract 
the underlying infrastructure to enable diverse routing: this gives a 
clear semantic on the SRLG link parameter. I do not see any value in 
using two different infrastructure descriptions, while I see some risk 
of operational mess in case one forget to update one of the parameter sets.
I also believe that if double SRLG capability had been an operator's 
requirement, we would have started from there and confronted that to 
both IGPs. This is a different motivation here.

Cheers,

Julien


> Thanks,
> Acee
>
[snip]


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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Julien Meuric <julien.meuric@orange.com>
Thread-Topic: [OSPF] Comment on draft-ppsenak-ospf-te-link-attr-reuse-01
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Date: Tue, 23 Feb 2016 19:05:45 +0000
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From nobody Fri Feb 26 15:56:57 2016
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From: Rob Shakir <rjs@rob.sh>
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--56d0e63d_66ff8e5a_111
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Hi Acee, Peter, Julien,

On 23 =46ebruary, 2016 at 12:06:10 PM, Acee Lindem (acee) (acee=40cisco.c=
om) wrote:

=23=23PP=C2=A0
I'm still not sure we want to enforce that even on the router that=C2=A0
generates these. Different apps may use different values of certain link=C2=
=A0
attribute. Take an SRLG as an example. You may have SRLG values on the=C2=
=A0
link used only by GMPLS/optical plane. These values have meaning only in=C2=
=A0
the context of the GMPLS/optical. You do not want L=46A to use these=C2=A0=

values, because their meaning is different and irrelevant for L=46A, you=C2=
=A0
may define a different set of values used by L=46A.=C2=A0
I tend to agree with Julien here, this sounds problematic from a manageme=
nt perspective. If I something that is a physical property of the link (w=
hich a SRLG is); and I run =E2=80=9CTE=E2=80=9D and =E2=80=9Cnon-TE=E2=80=
=9D applications on my network - i.e., a L=46A and RSVP-TE tunnels, then =
I now need to maintain both the lists being identical, such that the exte=
nded link attribute SRLG classification matches the TE attribute=E2=80=99=
s values. This sounds complex (what happens when they get out of sync); w=
ith no huge up-side to duplicating them. Even if we do want to have one a=
pplication work differently to another w.r.t SRLGs, then why would we not=
 do this with the policy that is used when making a path placement decisi=
on, rather than by splitting them into different attributes=3F

IMHO, a nice solution here is that we have each set of information mainta=
ined in one place in the protocol; if this has historically been in the T=
E attribute, then I do not necessarily see a good reason to try and move =
it. Going forward, we should discuss for new extensions whether these att=
ributes are solely useful for traffic engineering; or whether they are mo=
re general purpose, Metric gives us a good example here - the TE metric i=
s *only* relevant to traffic engineering path placement, whereas the metr=
ic is relevant to L=46A, standard IP applications, and can be relevant to=
 TE.=C2=A0

I would also rather see this than duplicating the same content of attribu=
tes across two different LSAs. This creates ambiguity as to which one was=
 actually used by the consuming application on the network element for a =
particular protocol.

Best,

r.


--56d0e63d_66ff8e5a_111
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<html><head><style>body=7Bfont-family:Droid Sans,Arial;font-size:13px=7D<=
/style></head><body style=3D=22word-wrap: break-word; -webkit-nbsp-mode: =
space; -webkit-line-break: after-white-space;=22><div id=3D=22bloop=5Fcus=
tomfont=22 style=3D=22font-family:Droid Sans,Arial;font-size:13px; color:=
 rgba(0,0,0,1.0); margin: 0px; line-height: auto;=22>Hi Acee, Peter, Juli=
en,</div> <br><p class=3D=22airmail=5Fon=22>On 23 =46ebruary, 2016 at 12:=
06:10 PM, Acee Lindem (acee) (<a href=3D=22mailto:acee=40cisco.com=22>ace=
e=40cisco.com</a>) wrote:</p> <div><blockquote type=3D=22cite=22 class=3D=
=22clean=5Fbq=22 style=3D=22font-family: 'Droid Sans', Arial; font-size: =
13px; font-style: normal; font-variant: normal; font-weight: normal; lett=
er-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; t=
ext-transform: none; white-space: normal; widows: auto; word-spacing: 0px=
; -webkit-text-stroke-width: 0px;=22><span><div><span style=3D=22color: r=
gb(0, 0, 0); font-family: 'helvetica Neue', helvetica; font-size: 13px; f=
ont-style: normal; font-variant: normal; font-weight: normal; letter-spac=
ing: normal; orphans: auto; text-align: start; text-indent: 0px; text-tra=
nsform: none; white-space: normal; widows: auto; word-spacing: 0px; -webk=
it-text-stroke-width: 0px; float: none; display: inline =21important;=22>=
=23=23PP<span class=3D=22Apple-converted-space=22>&nbsp;</span></span><br=
 style=3D=22color: rgb(0, 0, 0); font-family: 'helvetica Neue', helvetica=
; font-size: 13px; font-style: normal; font-variant: normal; font-weight:=
 normal; letter-spacing: normal; orphans: auto; text-align: start; text-i=
ndent: 0px; text-transform: none; white-space: normal; widows: auto; word=
-spacing: 0px; -webkit-text-stroke-width: 0px;=22><span style=3D=22color:=
 rgb(0, 0, 0); font-family: 'helvetica Neue', helvetica; font-size: 13px;=
 font-style: normal; font-variant: normal; font-weight: normal; letter-sp=
acing: normal; orphans: auto; text-align: start; text-indent: 0px; text-t=
ransform: none; white-space: normal; widows: auto; word-spacing: 0px; -we=
bkit-text-stroke-width: 0px; float: none; display: inline =21important;=22=
>I'm still not sure we want to enforce that even on the router that<span =
class=3D=22Apple-converted-space=22>&nbsp;</span></span><br style=3D=22co=
lor: rgb(0, 0, 0); font-family: 'helvetica Neue', helvetica; font-size: 1=
3px; font-style: normal; font-variant: normal; font-weight: normal; lette=
r-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; te=
xt-transform: none; white-space: normal; widows: auto; word-spacing: 0px;=
 -webkit-text-stroke-width: 0px;=22><span style=3D=22color: rgb(0, 0, 0);=
 font-family: 'helvetica Neue', helvetica; font-size: 13px; font-style: n=
ormal; font-variant: normal; font-weight: normal; letter-spacing: normal;=
 orphans: auto; text-align: start; text-indent: 0px; text-transform: none=
; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stro=
ke-width: 0px; float: none; display: inline =21important;=22>generates th=
ese. Different apps may use different values of certain link<span class=3D=
=22Apple-converted-space=22>&nbsp;</span></span><br style=3D=22color: rgb=
(0, 0, 0); font-family: 'helvetica Neue', helvetica; font-size: 13px; fon=
t-style: normal; font-variant: normal; font-weight: normal; letter-spacin=
g: normal; orphans: auto; text-align: start; text-indent: 0px; text-trans=
form: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit=
-text-stroke-width: 0px;=22><span style=3D=22color: rgb(0, 0, 0); font-fa=
mily: 'helvetica Neue', helvetica; font-size: 13px; font-style: normal; f=
ont-variant: normal; font-weight: normal; letter-spacing: normal; orphans=
: auto; text-align: start; text-indent: 0px; text-transform: none; white-=
space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width=
: 0px; float: none; display: inline =21important;=22>attribute. Take an S=
RLG as an example. You may have SRLG values on the<span class=3D=22Apple-=
converted-space=22>&nbsp;</span></span><br style=3D=22color: rgb(0, 0, 0)=
; font-family: 'helvetica Neue', helvetica; font-size: 13px; font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: normal=
; orphans: auto; text-align: start; text-indent: 0px; text-transform: non=
e; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-str=
oke-width: 0px;=22><span style=3D=22color: rgb(0, 0, 0); font-family: 'he=
lvetica Neue', helvetica; font-size: 13px; font-style: normal; font-varia=
nt: normal; font-weight: normal; letter-spacing: normal; orphans: auto; t=
ext-align: start; text-indent: 0px; text-transform: none; white-space: no=
rmal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; fl=
oat: none; display: inline =21important;=22>link used only by GMPLS/optic=
al plane. These values have meaning only in<span class=3D=22Apple-convert=
ed-space=22>&nbsp;</span></span><br style=3D=22color: rgb(0, 0, 0); font-=
family: 'helvetica Neue', helvetica; font-size: 13px; font-style: normal;=
 font-variant: normal; font-weight: normal; letter-spacing: normal; orpha=
ns: auto; text-align: start; text-indent: 0px; text-transform: none; whit=
e-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-wid=
th: 0px;=22><span style=3D=22color: rgb(0, 0, 0); font-family: 'helvetica=
 Neue', helvetica; font-size: 13px; font-style: normal; font-variant: nor=
mal; font-weight: normal; letter-spacing: normal; orphans: auto; text-ali=
gn: start; text-indent: 0px; text-transform: none; white-space: normal; w=
idows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: no=
ne; display: inline =21important;=22>the context of the GMPLS/optical. Yo=
u do not want L=46A to use these<span class=3D=22Apple-converted-space=22=
>&nbsp;</span></span><br style=3D=22color: rgb(0, 0, 0); font-family: 'he=
lvetica Neue', helvetica; font-size: 13px; font-style: normal; font-varia=
nt: normal; font-weight: normal; letter-spacing: normal; orphans: auto; t=
ext-align: start; text-indent: 0px; text-transform: none; white-space: no=
rmal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;=22=
><span style=3D=22color: rgb(0, 0, 0); font-family: 'helvetica Neue', hel=
vetica; font-size: 13px; font-style: normal; font-variant: normal; font-w=
eight: normal; letter-spacing: normal; orphans: auto; text-align: start; =
text-indent: 0px; text-transform: none; white-space: normal; widows: auto=
; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display=
: inline =21important;=22>values, because their meaning is different and =
irrelevant for L=46A, you<span class=3D=22Apple-converted-space=22>&nbsp;=
</span></span><br style=3D=22color: rgb(0, 0, 0); font-family: 'helvetica=
 Neue', helvetica; font-size: 13px; font-style: normal; font-variant: nor=
mal; font-weight: normal; letter-spacing: normal; orphans: auto; text-ali=
gn: start; text-indent: 0px; text-transform: none; white-space: normal; w=
idows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;=22><span =
style=3D=22color: rgb(0, 0, 0); font-family: 'helvetica Neue', helvetica;=
 font-size: 13px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; orphans: auto; text-align: start; text-in=
dent: 0px; text-transform: none; white-space: normal; widows: auto; word-=
spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inlin=
e =21important;=22>may define a different set of values used by L=46A.<sp=
an class=3D=22Apple-converted-space=22>&nbsp;</span></span></div></span><=
/blockquote></div><p>I tend to agree with Julien here, this sounds proble=
matic from a management perspective. If I something that is a physical pr=
operty of the link (which a SRLG is); and I run =E2=80=9CTE=E2=80=9D and =
=E2=80=9Cnon-TE=E2=80=9D applications on my network - i.e., a L=46A and R=
SVP-TE tunnels, then I now need to maintain both the lists being identica=
l, such that the extended link attribute SRLG classification matches the =
TE attribute=E2=80=99s values. This sounds complex (what happens when the=
y get out of sync); with no huge up-side to duplicating them. Even if we =
do want to have one application work differently to another w.r.t SRLGs, =
then why would we not do this with the policy that is used when making a =
path placement decision, rather than by splitting them into different att=
ributes=3F</p><p>IMHO, a nice solution here is that we have each set of i=
nformation maintained in one place in the protocol; if this has historica=
lly been in the TE attribute, then I do not necessarily see a good reason=
 to try and move it. Going forward, we should discuss for new extensions =
whether these attributes are solely useful for traffic engineering; or wh=
ether they are more general purpose, Metric gives us a good example here =
- the TE metric is *only* relevant to traffic engineering path placement,=
 whereas the metric is relevant to L=46A, standard IP applications, and c=
an be relevant to TE.&nbsp;</p><p>I would also rather see this than dupli=
cating the same content of attributes across two different LSAs. This cre=
ates ambiguity as to which one was actually used by the consuming applica=
tion on the network element for a particular protocol.</p><p>Best,</p><p>=
r.</p><div></div></body></html>
--56d0e63d_66ff8e5a_111--


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Date: Mon, 29 Feb 2016 13:30:51 +0100
From: Peter Psenak <ppsenak@cisco.com>
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To: Rob Shakir <rjs@rob.sh>, "Acee Lindem (acee)" <acee@cisco.com>, Julien Meuric <julien.meuric@orange.com>
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Subject: Re: [OSPF] Comment on draft-ppsenak-ospf-te-link-attr-reuse-01
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Hi Rob, Julien,

please see inline:

On 2/27/16 00:56 , Rob Shakir wrote:
> Hi Acee, Peter, Julien,
>
> On 23 February, 2016 at 12:06:10 PM, Acee Lindem (acee) (acee@cisco.com
> <mailto:acee@cisco.com>) wrote:
>
>> ##PP
>> I'm still not sure we want to enforce that even on the router that
>> generates these. Different apps may use different values of certain link
>> attribute. Take an SRLG as an example. You may have SRLG values on the
>> link used only by GMPLS/optical plane. These values have meaning only in
>> the context of the GMPLS/optical. You do not want LFA to use these
>> values, because their meaning is different and irrelevant for LFA, you
>> may define a different set of values used by LFA.
>
> I tend to agree with Julien here, this sounds problematic from a
> management perspective. If I something that is a physical property of
> the link (which a SRLG is); and I run “TE” and “non-TE” applications on
> my network - i.e., a LFA and RSVP-TE tunnels, then I now need to
> maintain both the lists being identical, such that the extended link
> attribute SRLG classification matches the TE attribute’s values. This
> sounds complex (what happens when they get out of sync); with no huge
> up-side to duplicating them. Even if we do want to have one application
> work differently to another w.r.t SRLGs, then why would we not do this
> with the policy that is used when making a path placement decision,
> rather than by splitting them into different attributes?
>
> IMHO, a nice solution here is that we have each set of information
> maintained in one place in the protocol; if this has historically been
> in the TE attribute, then I do not necessarily see a good reason to try
> and move it. Going forward, we should discuss for new extensions whether
> these attributes are solely useful for traffic engineering; or whether
> they are more general purpose, Metric gives us a good example here - the
> TE metric is *only* relevant to traffic engineering path placement,
> whereas the metric is relevant to LFA, standard IP applications, and can
> be relevant to TE.
>
> I would also rather see this than duplicating the same content of
> attributes across two different LSAs. This creates ambiguity as to which
> one was actually used by the consuming application on the network
> element for a particular protocol.

In general, enforcing the same values to be carried for the same link 
attribute in two different LSAs may become a limitation in the future. 
We already have a precedence with IGP/TE metric. At the end we are 
talking about two independent LSAs/TLVs, we are just sharing the same 
TLV format.

In terms of SRLG, there are real deployments, where optical plane uses 
SRLGs that are associated with a larger areas like "city" or "district" 
that are used for disaster recovery purposes and such values would have 
not meaning in the context of the LFA - one would still want to use the 
LFA that is in such SRLG.

There should be no ambiguity really - information carried in TE Opaque 
LSA is used by TE/GMPLS application. What is carried in Extended Link 
LSA is used by other applications.

thanks,
Peter






>
> Best,
>
> r.
>
>
>
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