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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Donald Eastlake <d3e3e3@gmail.com>
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Subject: Re: [RTG-DIR] Rtgdir early review of draft-ietf-nvo3-encap-07
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--=-=-=
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Donald Eastlake <d3e3e3@gmail.com> wrote:
    > If it is reasonable for something to be retained as "a record for
    > future reference" then, in my opinion, it follows that it is a
    > plausible candidate for publication as an RFC, likely an Informational
    > RFC, which is the category shown on the title page of this draft.

The IESG has declined to publish use case documents and pushed back on a lot
of things.  It's no longer 1992 :-)
But, as a record for decision making, I don't think that the document does a
good job.

    >> Major Issues:
    >>
    >> The document jumps right into comparing the three protocols.

    > Given that the purpose of the draft is to cover the comparison of the
    > protocols and selection of one, what sort of material do you think
    > should appear before the comparisons?

Maybe (from memory):
  1) establish the basis of comparison
  2) the environment in which things are targetted
  3) a bit more about why each protocol is the way it is.
  4) why converge at all.

    >> The deficiencies of each protocol are very briefly noted.
    >> No diagrams or extracts of the relevant protocols are included to he=
lp a
    >> reader understand the deficiencies.
    >>
    >> Few readers are likely to have a deep understanding of all three, so=
 some
    >> contrasting pictures would be helpful.

    > Some such diagrams could be added.

Thank you.

    >> The two major issues with GENEVE (can be longer than 256 bytes, has =
a hard to
    >> parse in hardware TLV structure) are identified.  But the document s=
eems to
    >> conclude on GENEVE, without explaining why those major issues are no=
t issues,
    >> or how they would be mitigated.

    > Jon Hudson responded to this point and something along the lines of
    > his answer could be incorporated into the draft.

I am not privvy to such a thread.
That's why I'm an external reviewer.


=2D-
Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 I=C3=B8T consulti=
ng )
           Sandelman Software Works Inc, Ottawa and Worldwide





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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Sat, 2 Oct 2021 23:55:48 -0400
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To: Michael Richardson <mcr+ietf@sandelman.ca>
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Subject: Re: [RTG-DIR] Rtgdir early review of draft-ietf-nvo3-encap-07
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Hi Michael,

On Fri, Oct 1, 2021 at 11:58 AM Michael Richardson
<mcr+ietf@sandelman.ca> wrote:
>
> Donald Eastlake <d3e3e3@gmail.com> wrote:
>     > If it is reasonable for something to be retained as "a record for
>     > future reference" then, in my opinion, it follows that it is a
>     > plausible candidate for publication as an RFC, likely an Informatio=
nal
>     > RFC, which is the category shown on the title page of this draft.
>
> The IESG has declined to publish use case documents and pushed back on a =
lot
> of things.  It's no longer 1992 :-)
> But, as a record for decision making, I don't think that the document doe=
s a
> good job.

True, there is some push back by the IESG against a separate use case
RFC or the like being some sort of gating consideration for technical
work. My impression is that much of the concern is about unnecessary
work and delay, especially in cases where the problem/use-case is
pretty well known. However, this particular document is not use
case(s) and, whether or not it's preparation caused any delay in the
approval of RFC 8926 (Geneve), that is all water under the bridge.

>     >> Major Issues:
>     >>
>     >> The document jumps right into comparing the three protocols.
>
>     > Given that the purpose of the draft is to cover the comparison of t=
he
>     > protocols and selection of one, what sort of material do you think
>     > should appear before the comparisons?
>
> Maybe (from memory):
>   1) establish the basis of comparison
>   2) the environment in which things are targeted
>   3) a bit more about why each protocol is the way it is.
>   4) why converge at all.

Thanks, those seem like good ideas to start from for some additional materi=
al.

>     >> The deficiencies of each protocol are very briefly noted.
>     >> No diagrams or extracts of the relevant protocols are included to =
help a
>     >> reader understand the deficiencies.
>     >>
>     >> Few readers are likely to have a deep understanding of all three, =
so some
>     >> contrasting pictures would be helpful.
>
>     > Some such diagrams could be added.
>
> Thank you.
>
>     >> The two major issues with GENEVE (can be longer than 256 bytes, ha=
s a hard to
>     >> parse in hardware TLV structure) are identified.  But the document=
 seems to
>     >> conclude on GENEVE, without explaining why those major issues are =
not issues,
>     >> or how they would be mitigated.
>
>     > Jon Hudson responded to this point and something along the lines of
>     > his answer could be incorporated into the draft.
>
> I am not privy to such a thread.
> That's why I'm an external reviewer.

My apologies for not being clear. I was referring to this email to you
on which the WG, rtg-dir and draft.all were cc'ed:
https://mailarchive.ietf.org/arch/msg/nvo3/cxZphhmyqv0xDwXGvoSHsTD3Gz0/

Thanks,
Donald
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 2386 Panoramic Circle, Apopka, FL 32703 USA
 d3e3e3@gmail.com

> --
> Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 I=C3=B8T consul=
ting )
>            Sandelman Software Works Inc, Ottawa and Worldwide


From nobody Mon Oct  4 19:45:57 2021
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Reviewer: Yingzhen Qu
Review result: Has Nits

Hello

I have been selected to do a routing directorate “early” review of this draft.
https://datatracker.ietf.org/doc/draft-ietf-pim-null-register-packing/

The routing directorate will, on request from the working group chair, perform
an “early” review of a draft before it is submitted for publication to the
IESG. The early review can be performed at any time during the draft’s lifetime
as a working group document. The purpose of the early review depends on the
stage that the document has reached.

As this document has gone through two working group last calls, my focus for
the review was to determine whether the document is ready to be published.
Please consider my comments along with the other working group last call
comments.

For more information about the Routing Directorate, please see
​http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir

Document: draft-ietf-pim-null-register-packing
Reviewer: Yingzhen Qu
Review Date: 10/04/2021
Intended Status: standards track

Summary:

This document is basically ready for publication, but has nits that should be
considered prior to being submitted to the IESG.

Comments:

The IESG state of this draft is “Dead”. This might be a system error, but
should be fixed.

** Downref: Normative reference to an Informational RFC: RFC 3446

The line numbers are from idnits output.
Question:
251        *  When a Register-Stop message with the P-bit set is received,
252           the DR MAY send PIM Packed Null-Register messages (Section 3)
253           to the RP instead of multiple Register messages with the N-bit
254           set ([[RFC7761]]).

256        *  The RP, after receiving a PIM Packed Null-Register message MAY
257           start sending PIM Packed Register-Stop messages (Section 4) to
258           the corresponding DR instead of individual Register-Stop
259           messages.
Why is "MAY" used here instead of "SHOULD"?

Section 6
288    the router should not advertise the capability.  However, an
289    implementation MAY choose to still parse any packed registers if they
290    are received.
For this case, which format of register-stop message the RP should send?

Section 8:
For this case, it is suggested that the DR can send an unpacked PIM
Null-Register. How can the DR know that the packed Null-Register message
is not lost?

Nits:

* Warning from idnits because reference to RFC 8174 is missing.
  == The document seems to lack the recommended RFC 2119 boilerplate, even if
     it appears to use RFC 2119 keywords -- however, there's a paragraph with
     a matching beginning. Boilerplate error?

     RFC 8174, paragraph 11:
        The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
        "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY",
        and "OPTIONAL" in this document are to be interpreted as
        described in BCP 14 [RFC2119] [RFC8174] when, and only when, they
        appear in all capitals, as shown here.

     ... text found in draft:
        The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
        "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY",
        and "OPTIONAL" in this document are to be interpreted as
        described in BCP 14 [RFC2119] when, and only when, they appear in
......................................^
        all capitals, as shown here.

* There are several places in the draft that an extra "[]" is used. For example:
298      MSDP [[RFC3446]] as well.
s/[[RFC3446]]/[RFC3446]
Please fix them all.

25     This document defines a standard to send multiple multicast source
26     and group information in a single PIM Null-Register message, in a
27     packed format.  We will refer to this packed format as the PIM Packed
28     Null-Register format throughout the document.
"in a single PIM Null-Register message, in a packed format." This is a bit
confusing, as it should be a new message called "the PIM Packed Null-Register".

28     Null-Register format throughout the document.  This document also
29     discusses the interoperability between the PIM routers which do not
30     understand the packed message format with multiple multicast source
31     and group details.
It should be interoperability between the PIM routers which do not understand
the packet message format and routers which do understand it.

For section 5, case 2 and 3, it should be added that after receiving
DR's PIM Null-Register message, it sends Register-Stop message.



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From: Alexander Vainshtein <Alexander.Vainshtein@rbbn.com>
To: "bess-chairs@ietf.org" <bess-chairs@ietf.org>, "draft-ietf-bess-evpm-bum-procedure-updates.all@ietf.org" <draft-ietf-bess-evpm-bum-procedure-updates.all@ietf.org>
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Thread-Topic: RTG-DIR early review: draft-ietf-bess-evpn-bum-procedure-updates-10
Thread-Index: Ade5Mcxpim6Uw6T5TJ2a2jDngCyePw==
Date: Thu, 7 Oct 2021 12:48:16 +0000
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To: Alexander Vainshtein <Alexander.Vainshtein@rbbn.com>, "bess-chairs@ietf.org" <bess-chairs@ietf.org>, "draft-ietf-bess-evpm-bum-procedure-updates.all@ietf.org" <draft-ietf-bess-evpm-bum-procedure-updates.all@ietf.org>
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Thread-Topic: RTG-DIR early review: draft-ietf-bess-evpn-bum-procedure-updates-10
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Date: Thu, 7 Oct 2021 19:49:40 +0000
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Subject: Re: [RTG-DIR] RTG-DIR early review: draft-ietf-bess-evpn-bum-procedure-updates-10
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From nobody Fri Oct  8 15:19:33 2021
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Subject: [RTG-DIR] Rtgdir last call review of draft-ietf-teas-gmpls-signaling-smp-07
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Reviewer: Ines Robles
Review result: Has Nits

Hello,

I have been selected as the Routing Directorate reviewer for this draft. The
Routing Directorate seeks to review all routing or routing-related drafts as
they pass through IETF last call and IESG review, and sometimes on special
request. The purpose of the review is to provide assistance to the Routing ADs.
For more information about the Routing Directorate, please see
​http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir

Although these comments are primarily for the use of the Routing ADs, it would
be helpful if you could consider them along with any other IETF Last Call
comments that you receive, and strive to resolve them through discussion or by
updating the draft.

Document: draft-ietf-teas-gmpls-signaling-smp-07
Reviewer: Ines Robles
Review Date: 2021-10-08
IETF LC End Date: 2021-10-08
Intended Status: Standards Track

Summary:

This document updates RFC 4872 to provide the extensions to the Generalized
Multi-Protocol Label Switching (GMPLS) signaling to support the control of the
Shared Mesh Protection.

I did not find major issues, I have some questions/comments.

Major Issues: Not found
Minor Issues: Not found
Nits:

1- Section 1: Which are the generic aspects of SMP signaling? Maybe it would be
nice to add "Only the generic aspects (such as....) for signaling SMP..."

2- Section 4: "...resource sharing along nodes E, F and G..." Maybe it would be
nice to add examples of resources that can be shared between the nodes E, F and
G.

3- Section 4, page 5: Maybe? the intermediate node MUST send.... => the
intermediate node (node E) MUST send...

4- Section 4, page 6: ... with a new sub-code "Shared resources
unavailable"=>... with a new sub-code "Shared resources unavailable"(TBD1)...
                      ... with a new sub-code "Shared resources available" =>
                      ... with a new sub-code "Shared resources available"
                      (TBD2)...

4- Section 4, page 6: Maybe it would be nice to associate with an example the
five points outlined on how LSPs using SMP can be signaled in an interoperable
fashion, e.g.
 ..(1) the ability to identify a "secondary protecting LSP", from Figure 1,
 which would be the secondary LSP "E,F,G"?

5- Section 7: The Security considerations do not explain clearly how the
RFC4872-security-considerations applies to the Shared Mesh Protection and to
the preemption priority.

Thanks for this document,

Ines.



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--------------ms020706000507050500020300
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Hello,

I have been selected as the Routing Directorate reviewer for this draft. =

The Routing Directorate seeks to review all routing or routing-related=20
drafts as they pass through IETF last call and IESG review. The purpose=20
of the review is to provide assistance to the Routing ADs. For more=20
information about the Routing Directorate, please see=20
=E2=80=8Bhttp://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir

Although these comments are primarily for the use of the Routing ADs, it =

would be helpful if you could consider them along with any other IETF=20
Last Call comments that you receive, and strive to resolve them through=20
discussion or by updating the draft.

Document: draft-ietf-bess-evpn-optimized-ir-09
Reviewer: Julien Meuric
Review Date: 2021-10-12
IETF LC End Date: 2021-09-07
Intended Status: Standards Track

*Summary:*
I think the document is almost ready for publication, but a few=20
clarification improvements should be considered before.

*Comments:*
First of all, I must say that I'm not an expert on NVO3 nor data=20
centers. As a result, reading the document implied an extensive use of=20
the terminology section at the beginning. Once through with this step,=20
the document appears to be well written and specifications are clear and =

well organized. I suggest a few clarifications below.

*Major Issues:*
No major issues found.

*Minor Issues:*
- The terminology section doesn't gather all the terms/acronyms used=20
along the I-D. Some are expanded on use (not necessarily the 1st one),=20
some aren't. Among the missing ones I spotted: RD, TS, PMSI, Leaf A-D,=20
VSID, ES, ESI, DF, NDF...
- Section 4 includes 2 naked figures. Each of them deserves a title=20
(beware of the multiple references to the former Figure 1 when renumberin=
g).
- The PTA's description mentions the T, BM, U and L flags: it would be=20
valuable to include them on the figure, all the more as their position=20
is already defined or even pre-existing (L).
- Section 8 tackles a particular case which may arise with "some=20
software-based or low-end AR-REPLICATOR nodes" which do "not support=20
more than one IP address". One could wonder if that kind of nodes would=20
be appropriate to be used as AR-REPLICATORs. Anyway, assuming that=20
situation can be faced, what is the expected behavior in case of common=20
Ethernet Segments, i.e. if a BD falls within the scope of both section 8 =

and section 9? (If nonsense, a sentence might be welcome.)
- The document describes several procedures in several steps, including=20
a kind of functional description and a node-centric behavior, which are=20
complementary and provide some useful rephrasing. However, they=20
sometimes feel like overlapping a bit (e.g., in section 5.1, item d. and =

a few paragraphs further about "BM packet on an overlay tunnel"), or=20
don't necessarily use the same level of RFC 2119 terminology. Careful=20
alignment/limited duplication would be welcome there.
- Section 5.2 states that "the AR-LEAF can locally select which=20
AR-REPLICATOR it sends the BM traffic to". It seems that nothing=20
precludes an on-the-fly change, e.g. for administrative or policy=20
reasons, but an explicit sentence could make it clearer. A similar=20
comment applies to Section 6.2.
- In section 7, "a node MAY decide to honor the PFL flag". Two=20
subsequent comments:
 =C2=A0 * "a node MAY honor" is enough to describe the expectation,
 =C2=A0 * what happens if the node doesn't honor? Is it "free to silently=
=20
ignore" the flag?

*Nits:*

Abstract:
- EVPN isn't expanded at 1st use and isn't marked as well-know by the=20
RFC Editor (though I agree it could;=20
https://www.rfc-editor.org/materials/abbrev.expansion.txt).
- s/PIM (Protocol Independent Multicast) based trees/PIM (Protocol=20
Independent Multicast)-based trees/

Section 1:
- s/Tenant Systems (TS) reducing/Tenant Systems (TS), reducing/

Section 2:
- BD's expansion should come earlier since it's forward referred to by=20
some previous items in the list.
- The phrases "ingress traffic" and "ingress packets" are used: wouldn't =

"incoming traffic" and "incoming packets" be more appropriate?

Section 3:
- s/3. Solution requirements/3. Solution Requirements/

Section 4:
- s/Attributes for optimized-IR/Attributes for Optimized-IR/
- s/the PE's loopback address/a loopback address of the PE/
- s/different than the IR-IP/different from the IR-IP/
- s/its use SHOULD/their use SHOULD/

Section 5:
- OLD
 =C2=A0=C2=A0 Unknown unicast SHALL follow
 =C2=A0=C2=A0 the same path as known unicast traffic in order to avoid pa=
cket
 =C2=A0=C2=A0 reordering for unicast applications and simplify the contro=
l and data
 =C2=A0=C2=A0 plane procedures.
 =C2=A0=C2=A0 Note that known unicast forwarding is not impacted by this =
solution.
 =C2=A0 NEW
 =C2=A0=C2=A0 Note that known unicast forwarding is not impacted by this =
solution,
 =C2=A0=C2=A0 i.e. unknown unicast SHALL follow the same path as known un=
icast
 =C2=A0=C2=A0 traffic.

- s/5.1. Non-selective AR-REPLICATOR procedures/5.1. Non-selective=20
AR-REPLICATOR Procedures/
- s/ingress BM/incoming BM/
- s/to either AR-REPLICATOR or AR-LEAF/to AR-REPLICATOR or AR-LEAF/
- s/it is RECOMMENDED to use this flag for/this flag is useful for/=20
["SHOULD set" in the previous sentence is fine, RFC 2119 language to=20
suggest a use case isn't appropriate]
- s/send all the BM packets to that AR-REPLICATOR/send all the BM=20
packets targeted to that AR-REPLICATOR/
- s/overlay tunnel, will forward/overlay tunnel, it will forward/
- s/in section Section 5.1./in Section 5.1./
- s/5.3. RNVE procedures/5.3. RNVE Procedures/

Section 6:
- s/the AR-LEAF that requested/the AR-LEAFs that requested/
- s/6.1. Selective AR-REPLICATOR procedures/6.1. Selective AR-REPLICATOR =

Procedures/
- s/The Replicator-AR route MUST include/The AR-REPLICATOR MUST include/
- s/AR-LEAF-set (excluding the overlay tunnel to the source=20
AR-LEAF)./AR-LEAF-set, excluding the overlay tunnel to the source AR-LEAF=
=2E/
- s/speed up the convergence/speed up the traffic recovery/=C2=A0 [or=20
"mitigate the traffic impact"]

Section 8:
- s/8. AR Procedures for single-IP AR-REPLICATORS/8. AR Procedures for=20
Single-IP AR-REPLICATORS/

Section 10:
- s/existance/existence/
- s/this document provides a fall back/this document specifies a fall bac=
k/


Regards,

Julien



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From: Ines  Robles <mariainesrobles@googlemail.com>
Date: Fri, 15 Oct 2021 12:39:34 +0300
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To: Jeong-dong Ryoo <ryoo@etri.re.kr>
Cc: rtg-dir@ietf.org, last-call@ietf.org, teas@ietf.org,  draft-ietf-teas-gmpls-signaling-smp.all@ietf.org
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Subject: Re: [RTG-DIR] [Last-Call] Rtgdir last call review of draft-ietf-teas-gmpls-signaling-smp-07
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Dear Jeong-dong,

Thank you very much for addressing my comments. I agree with all of them.

Best Regards,

Ines.

On Fri, Oct 15, 2021 at 12:21 PM Jeong-dong Ryoo <ryoo@etri.re.kr> wrote:

> Dear Ines,
>
> Thank you for your review and for giving us your comments.
>
> The co-authors of this draft have discussed, and we think all of your
> comments should be reflected. We are proposing text modifications as show=
n
> below:
>
> #1:
> OLD:
> ITU-T Recommendation G.808.3 [G808.3] defines the generic aspects of
> a shared mesh protection (SMP) mechanism
> NEW:
> TU-T Recommendation G.808.3 [G808.3] defines the generic aspects of
> a shared mesh protection (SMP) mechanism, which are not specific to
> a particular network technology in terms of architecture types,
> preemption principle, and path monitoring methods, etc.
>
> #2: Add the following new sentence after the sentence you indicated:
>  Examples of shared resources include the capacity of a link and the
> cross-connects in a node.
>
> #3: Modify the text as you suggested
>
> #4-1: Modify the text as you suggested
>
> #4-2:
> OLD:
> (1) the ability to identify a "secondary protecting LSP" (hereby
>       called the "secondary LSP") used to recover another primary
>       working LSP (hereby called the "protected LSP")
> NEW:
> (1) the ability to identify a "secondary protecting LSP"
>       (LSP [A,E,F,G,D] or LSP [H,E,F,G,K] from Figure 1,  hereby
>       called the "secondary LSP") used to recover another "primary
>       working LSP" (LSP [A,B,C,D] or LSP [H,I,J,K] from Figure 1,
>       hereby called the "protected LSP").
>
> #5:
> OLD:
>    The security threats discussed in [RFC4872] also apply to this
>    document.  Additionally, it may be possible to cause disruption to
>    traffic on one protecting LSP by targeting a link used by the primary
>    LSP of another, higher priority LSP somewhere completely different in
>    the network.  To prevent such an additional risk factor, it is
>    important not only to use security mechanisms as discussed in
>    [RFC4872] but also to preserve privacy of information about
>    protecting LSPs within the network.
> NEW:
>    Since this document makes use of the exchange of RSVP messages
>    including a Notify message, the security threats discussed in [RFC4872=
]
>    also apply to this document.
>
>    Additionally, it may be possible to cause disruption to
>    traffic on one protecting LSP by targeting a link used by the primary
>    LSP of another, higher priority LSP somewhere completely different in
>    the network. For example, in Figure 1, assume that the preemption
>    priority of LSP [A,E,F,G,D] is higher than that of LSP [H,E,F,G,K] and
>    the protecting LSP [H,E,F,G,K] is being used to transport traffic.
>    If link B-C is attacked, traffic on LSP [H,E,F,G,K] can be disrupted.
>    To prevent such an additional risk factor, it is
>    important not only to use security mechanisms as discussed in
>    [RFC4872] but also to preserve privacy of information about
>    protecting LSPs within the network.
>
> If you have any comments on the proposed changes, please let us know.
>
> Best regards,
>
> Jeong-dong (on behalf of co-authors)
>
>
>
> -----Original Message-----
> From:  "Ines Robles via Datatracker" <noreply@ietf.org>
> To:      <rtg-dir@ietf.org>;
> Cc:      <last-call@ietf.org>;   <teas@ietf.org>;   <
> draft-ietf-teas-gmpls-signaling-smp.all@ietf.org>;
> Sent:  2021-10-09 (=ED=86=A0) 07:20:42 (UTC+09:00)
> Subject: [Last-Call] Rtgdir last call review of
> draft-ietf-teas-gmpls-signaling-smp-07
>
> Reviewer: Ines Robles
> Review result: Has Nits
>
> Hello,
>
> I have been selected as the Routing Directorate reviewer for this draft.
> The
> Routing Directorate seeks to review all routing or routing-related drafts
> as
> they pass through IETF last call and IESG review, and sometimes on specia=
l
> request. The purpose of the review is to provide assistance to the Routin=
g
> ADs.
> For more information about the Routing Directorate, please see
> =E2=80=8Bhttp://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir
>
> Although these comments are primarily for the use of the Routing ADs, it
> would
> be helpful if you could consider them along with any other IETF Last Call
> comments that you receive, and strive to resolve them through discussion
> or by
> updating the draft.
>
> Document: draft-ietf-teas-gmpls-signaling-smp-07
> Reviewer: Ines Robles
> Review Date: 2021-10-08
> IETF LC End Date: 2021-10-08
> Intended Status: Standards Track
>
> Summary:
>
> This document updates RFC 4872 to provide the extensions to the Generaliz=
ed
> Multi-Protocol Label Switching (GMPLS) signaling to support the control o=
f
> the
> Shared Mesh Protection.
>
> I did not find major issues, I have some questions/comments.
>
> Major Issues: Not found
> Minor Issues: Not found
> Nits:
>
> 1- Section 1: Which are the generic aspects of SMP signaling? Maybe it
> would be
> nice to add "Only the generic aspects (such as....) for signaling SMP..."
>
> 2- Section 4: "...resource sharing along nodes E, F and G..." Maybe it
> would be
> nice to add examples of resources that can be shared between the nodes E,
> F and
> G.
>
> 3- Section 4, page 5: Maybe? the intermediate node MUST send.... =3D> the
> intermediate node (node E) MUST send...
>
> 4- Section 4, page 6: ... with a new sub-code "Shared resources
> unavailable"=3D>... with a new sub-code "Shared resources
> unavailable"(TBD1)...
>                       ... with a new sub-code "Shared resources available=
"
> =3D>
>                       ... with a new sub-code "Shared resources available=
"
>                       (TBD2)...
>
> 4- Section 4, page 6: Maybe it would be nice to associate with an example
> the
> five points outlined on how LSPs using SMP can be signaled in an
> interoperable
> fashion, e.g.
>  ..(1) the ability to identify a "secondary protecting LSP", from Figure =
1,
>  which would be the secondary LSP "E,F,G"?
>
> 5- Section 7: The Security considerations do not explain clearly how the
> RFC4872-security-considerations applies to the Shared Mesh Protection and
> to
> the preemption priority.
>
> Thanks for this document,
>
> Ines.
>
>
> --
> last-call mailing list
> last-call@ietf.org
> https://www.ietf.org/mailman/listinfo/last-call
>

--0000000000003b5e8a05ce60fb40
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Dear=C2=A0Jeong-dong,<div><br></div><div>Thank you very mu=
ch for addressing my comments. I agree with all of them.</div><div><br></di=
v><div>Best Regards,</div><div><br></div><div>Ines.=C2=A0</div></div><br><d=
iv class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, Oct =
15, 2021 at 12:21 PM Jeong-dong Ryoo &lt;<a href=3D"mailto:ryoo@etri.re.kr"=
>ryoo@etri.re.kr</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" =
style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pa=
dding-left:1ex">Dear Ines,<br>
<br>
Thank you for your review and for giving us your comments.<br>
<br>
The co-authors of this draft have discussed, and we think all of your comme=
nts should be reflected. We are proposing text modifications as shown below=
:<br>
<br>
#1: <br>
OLD:<br>
ITU-T Recommendation G.808.3 [G808.3] defines the generic aspects of<br>
a shared mesh protection (SMP) mechanism<br>
NEW:<br>
TU-T Recommendation G.808.3 [G808.3] defines the generic aspects of<br>
a shared mesh protection (SMP) mechanism, which are not specific to <br>
a particular network technology in terms of architecture types, <br>
preemption principle, and path monitoring methods, etc.=C2=A0 =C2=A0 <br>
<br>
#2: Add the following new sentence after the sentence you indicated:<br>
=C2=A0Examples of shared resources include the capacity of a link and the c=
ross-connects in a node.<br>
<br>
#3: Modify the text as you suggested<br>
<br>
#4-1: Modify the text as you suggested<br>
<br>
#4-2: <br>
OLD:<br>
(1) the ability to identify a &quot;secondary protecting LSP&quot; (hereby<=
br>
=C2=A0 =C2=A0 =C2=A0 called the &quot;secondary LSP&quot;) used to recover =
another primary<br>
=C2=A0 =C2=A0 =C2=A0 working LSP (hereby called the &quot;protected LSP&quo=
t;)<br>
NEW:<br>
(1) the ability to identify a &quot;secondary protecting LSP&quot; <br>
=C2=A0 =C2=A0 =C2=A0 (LSP [A,E,F,G,D] or LSP [H,E,F,G,K] from Figure 1,=C2=
=A0 hereby<br>
=C2=A0 =C2=A0 =C2=A0 called the &quot;secondary LSP&quot;) used to recover =
another &quot;primary<br>
=C2=A0 =C2=A0 =C2=A0 working LSP&quot; (LSP [A,B,C,D] or LSP [H,I,J,K] from=
 Figure 1,=C2=A0 <br>
=C2=A0 =C2=A0 =C2=A0 hereby called the &quot;protected LSP&quot;).<br>
<br>
#5:<br>
OLD:<br>
=C2=A0 =C2=A0The security threats discussed in [RFC4872] also apply to this=
<br>
=C2=A0 =C2=A0document.=C2=A0 Additionally, it may be possible to cause disr=
uption to<br>
=C2=A0 =C2=A0traffic on one protecting LSP by targeting a link used by the =
primary<br>
=C2=A0 =C2=A0LSP of another, higher priority LSP somewhere completely diffe=
rent in<br>
=C2=A0 =C2=A0the network.=C2=A0 To prevent such an additional risk factor, =
it is<br>
=C2=A0 =C2=A0important not only to use security mechanisms as discussed in<=
br>
=C2=A0 =C2=A0[RFC4872] but also to preserve privacy of information about<br=
>
=C2=A0 =C2=A0protecting LSPs within the network.<br>
NEW:<br>
=C2=A0 =C2=A0Since this document makes use of the exchange of RSVP messages=
 <br>
=C2=A0 =C2=A0including a Notify message, the security threats discussed in =
[RFC4872] <br>
=C2=A0 =C2=A0also apply to this document.=C2=A0 <br>
<br>
=C2=A0 =C2=A0Additionally, it may be possible to cause disruption to <br>
=C2=A0 =C2=A0traffic on one protecting LSP by targeting a link used by the =
primary<br>
=C2=A0 =C2=A0LSP of another, higher priority LSP somewhere completely diffe=
rent in<br>
=C2=A0 =C2=A0the network. For example, in Figure 1, assume that the preempt=
ion <br>
=C2=A0 =C2=A0priority of LSP [A,E,F,G,D] is higher than that of LSP [H,E,F,=
G,K] and <br>
=C2=A0 =C2=A0the protecting LSP [H,E,F,G,K] is being used to transport traf=
fic. <br>
=C2=A0 =C2=A0If link B-C is attacked, traffic on LSP [H,E,F,G,K] can be dis=
rupted. <br>
=C2=A0 =C2=A0To prevent such an additional risk factor, it is<br>
=C2=A0 =C2=A0important not only to use security mechanisms as discussed in<=
br>
=C2=A0 =C2=A0[RFC4872] but also to preserve privacy of information about<br=
>
=C2=A0 =C2=A0protecting LSPs within the network.<br>
<br>
If you have any comments on the proposed changes, please let us know.<br>
<br>
Best regards,<br>
<br>
Jeong-dong (on behalf of co-authors)<br>
<br>
<br>
<br>
-----Original Message-----<br>
From:=C2=A0 &quot;Ines Robles via Datatracker&quot; &lt;<a href=3D"mailto:n=
oreply@ietf.org" target=3D"_blank">noreply@ietf.org</a>&gt;<br>
To:=C2=A0 =C2=A0 =C2=A0 &lt;<a href=3D"mailto:rtg-dir@ietf.org" target=3D"_=
blank">rtg-dir@ietf.org</a>&gt;; <br>
Cc:=C2=A0 =C2=A0 =C2=A0 &lt;<a href=3D"mailto:last-call@ietf.org" target=3D=
"_blank">last-call@ietf.org</a>&gt;;=C2=A0 =C2=A0&lt;<a href=3D"mailto:teas=
@ietf.org" target=3D"_blank">teas@ietf.org</a>&gt;;=C2=A0 =C2=A0&lt;<a href=
=3D"mailto:draft-ietf-teas-gmpls-signaling-smp.all@ietf.org" target=3D"_bla=
nk">draft-ietf-teas-gmpls-signaling-smp.all@ietf.org</a>&gt;; <br>
Sent:=C2=A0 2021-10-09 (=ED=86=A0) 07:20:42 (UTC+09:00)<br>
Subject: [Last-Call] Rtgdir last call review of draft-ietf-teas-gmpls-signa=
ling-smp-07<br>
<br>
Reviewer: Ines Robles<br>
Review result: Has Nits<br>
<br>
Hello,<br>
<br>
I have been selected as the Routing Directorate reviewer for this draft. Th=
e<br>
Routing Directorate seeks to review all routing or routing-related drafts a=
s<br>
they pass through IETF last call and IESG review, and sometimes on special<=
br>
request. The purpose of the review is to provide assistance to the Routing =
ADs.<br>
For more information about the Routing Directorate, please see<br>
=E2=80=8B<a href=3D"http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir" r=
el=3D"noreferrer" target=3D"_blank">http://trac.tools.ietf.org/area/rtg/tra=
c/wiki/RtgDir</a><br>
<br>
Although these comments are primarily for the use of the Routing ADs, it wo=
uld<br>
be helpful if you could consider them along with any other IETF Last Call<b=
r>
comments that you receive, and strive to resolve them through discussion or=
 by<br>
updating the draft.<br>
<br>
Document: draft-ietf-teas-gmpls-signaling-smp-07<br>
Reviewer: Ines Robles<br>
Review Date: 2021-10-08<br>
IETF LC End Date: 2021-10-08<br>
Intended Status: Standards Track<br>
<br>
Summary:<br>
<br>
This document updates RFC 4872 to provide the extensions to the Generalized=
<br>
Multi-Protocol Label Switching (GMPLS) signaling to support the control of =
the<br>
Shared Mesh Protection.<br>
<br>
I did not find major issues, I have some questions/comments.<br>
<br>
Major Issues: Not found<br>
Minor Issues: Not found<br>
Nits:<br>
<br>
1- Section 1: Which are the generic aspects of SMP signaling? Maybe it woul=
d be<br>
nice to add &quot;Only the generic aspects (such as....) for signaling SMP.=
..&quot;<br>
<br>
2- Section 4: &quot;...resource sharing along nodes E, F and G...&quot; May=
be it would be<br>
nice to add examples of resources that can be shared between the nodes E, F=
 and<br>
G.<br>
<br>
3- Section 4, page 5: Maybe? the intermediate node MUST send.... =3D&gt; th=
e<br>
intermediate node (node E) MUST send...<br>
<br>
4- Section 4, page 6: ... with a new sub-code &quot;Shared resources<br>
unavailable&quot;=3D&gt;... with a new sub-code &quot;Shared resources unav=
ailable&quot;(TBD1)...<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 ... with a new sub-code &quot;Shared resources available&quot; =3D&gt;<=
br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 ... with a new sub-code &quot;Shared resources available&quot;<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 (TBD2)...<br>
<br>
4- Section 4, page 6: Maybe it would be nice to associate with an example t=
he<br>
five points outlined on how LSPs using SMP can be signaled in an interopera=
ble<br>
fashion, e.g.<br>
=C2=A0..(1) the ability to identify a &quot;secondary protecting LSP&quot;,=
 from Figure 1,<br>
=C2=A0which would be the secondary LSP &quot;E,F,G&quot;?<br>
<br>
5- Section 7: The Security considerations do not explain clearly how the<br=
>
RFC4872-security-considerations applies to the Shared Mesh Protection and t=
o<br>
the preemption priority.<br>
<br>
Thanks for this document,<br>
<br>
Ines.<br>
<br>
<br>
-- <br>
last-call mailing list<br>
<a href=3D"mailto:last-call@ietf.org" target=3D"_blank">last-call@ietf.org<=
/a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/last-call" rel=3D"noreferr=
er" target=3D"_blank">https://www.ietf.org/mailman/listinfo/last-call</a><b=
r>
</blockquote></div>

--0000000000003b5e8a05ce60fb40--


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To: tal.mizrahi.phd@gmail.com, rtg-ads@ietf.org, draft-ietf-raw-ldacs@ietf.org
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Cc: rtg-dir@ietf.org, last-call@ietf.org, raw@ietf.org, "Thomas.Graeupl@dlr.de" <Thomas.Graeupl@dlr.de>, "Nils.Maeurer@dlr.de" <Nils.Maeurer@dlr.de>
From: "Dr. Corinna Schmitt" <corinna.schmitt@unibw.de>
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Subject: Re: [RTG-DIR] RtgDir Last Call review: draft-ietf-raw-ldacs
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Dear All,

thanks for the feedback. We addressed it and uploaded a new version a
minute ago: https://www.ietf.org/archive/id/draft-ietf-raw-ldacs-09.html

In order to identify the parts where we addressed the received feedback
find it below in -line.

Regards,

Nils, Thomas, and Corinna




> ------------------------------------------------------------------------
> *Von:* Tal Mizrahi <tal.mizrahi.phd@gmail.com>
> *Gesendet:* Mittwoch, 1. September 2021 12:11:59
> *An:* rtg-ads@ietf.org; draft-ietf-raw-ldacs@ietf.org
> *Cc:* rtg-dir@ietf.org; last-call@ietf.org; raw@ietf.org
> *Betreff:* RtgDir Last Call review: draft-ietf-raw-ldacs
> 
>
> Hello,
>
> I have been selected as the Routing Directorate reviewer for this
> draft. The Routing Directorate seeks to review all routing or
> routing-related drafts as they pass through IETF last call and IESG
> review, and sometimes on special request. The purpose of the review is
> to provide assistance to the Routing ADs. For more information about
> the Routing Directorate, please
> seehttp://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir
> <http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir>
>
> Although these comments are primarily for the use of the Routing ADs,
> it would be helpful if you could consider them along with any other
> IETF Last Call comments that you receive, and strive to resolve them
> through discussion or by updating the draft.
>
> Document:draft-ietf-raw-ldacs-08
> Reviewer: Tal Mizrahi
> Review Date: 2021-09-01
> Intended Status: Informational
>
> *Summary:*
> I have some minor concerns about this document that I think should be
> resolved before publication.
>
> *Comments:*
>
> The draft provides an overview of the L-band Digital Aeronautical
> Communications System (LDACS), which is a work-in-progress standard by
> the ICAO standardization group. The draft is well-written, and is
> almost ready for publication, with a few comments that follow.
>
> *Major Issues:*
>
>   * Although the abstract clearly explains that LDACS includes support
>     for IPv6, the reader later learns that LDACs is mostly a Layer 2
>     technology, and that IPv6 over LDACS has not been defined yet. The
>     document does not describe the connection between LDACS and IPv6,
>     why IPv6 was chosen (and not IPv4), and the challenges of using
>     IPv6 over this technology. It would be worthwhileto add a
>     paragraph or two about this to the introduction.
>
      o We mentioned further regulatory document such as ICAO Doc 9896,
        RTCA DO-379, EUROCAE ED-262 and ARINC P858 all concerned with
        the foreseen ATN/IPS aeronautical communications backbone
        infrastructure in the introduction (Step (2) ...). IPv6 has been
        chosen as the basis for the ATN/IPS network and LDACS is a
        datalink access network technology from the view of ATN/IPS.
        This I highlighted also in the introduction.

>  *
>
>
>   * Specifically, it would be useful to add a paragraph that explains
>     how LDACS is related to IETF protocols, and whether any work is
>     expected in the IETF in this context.
>
      o We added a paragraph at the end of the introduction, explaining
        the LDACS relevance in RAW and within the IETF.

> *Other Issues:*
>
>   * Minor issues are concerns about clarity or technical accuracy that
>     should be discussed and resolved before publication, but which
>     would normally be resolved between the authors and the reviewers.
>   * Please include all of the minor issues you have found. Give as
>     much context information as possible (e.g., section numbers,
>     paragraph counts).
>   * If you find no minor issues, please write: "No minor issues found."
>
> *Nits:*
>
> - It would be useful to mention in the introduction in which parts of
> the world LDACS is expected to be deployed, and whether any
> geographical restrictions are expected in the context of this technology.

 We addressed that in the introduction (Step (1)... Since
central Europe has been identified as the area of the world, that
suffers the most from increased saturation of the VHF band, the initial
roll-out of LDACS will likely start there, and continue to other
increasingly saturated zones as the east- and west-cost of the US and
parts of Asia [ICAO2018]).

>
> - Throughout the document the word "shall" (lowercase) is used often.
> It is not clear whether this is because this text refers to the future
> tense, or whether because this is phrased as a requirement. I would
> suggest to replacethe word "shall" by a different word, or to explain
> at the beginning what it means in this document.

 Apart from directly citing the security objectives in chapter
9.3. and from RTCA DO-350A document in the appendix A, we removed the
word shall throughout the document.

>
> - Abstract:
>  "High reliability and availability for IP connectivity over LDACS
> are therefore essential."
>  It would be useful to also mention security in this sentence.

 This is addressed now in the abstract.

>
> - Introduction:
>  "efficient aircraft control and safe separation"
>  Please clarify what you mean by separation (perhaps separation
> between entertainment system traffic and aircraft control traffic?).

    We clarified that by clearly stating aircraft separation. This is
    a term is used and widely known in aeronautics for vertical and
    horizontal separation standards to facilitate the safe navigation of
    aircraft in controlled airspace [ICAO Doc 4444  Chapter 5].

>
> - Introduction:
>  The following sentence is mentioned in Section 4. Maybe it would be
> useful in the introduction.
>  "LDACS standardization within the framework of the ICAO started in
>  December 2016. The ICAO standardization group has produced an
>  initial Standards and Recommended Practices document [ICA2018]."

 Thank you for the note, we moved it to the end of the introduction

>
> - Section 3:
>  The term "Business Communication" is used several times. It would be
> useful to define what this means.



 We added a short explanatory sentence in chapter 3 for a clear
definition of the term.

>
> - Section 5:
>  The word "RECOMMENDS" (uppercase) is used here. This is not a
> standard RFC2119 key word. Please change it to lowercase.

 We changed all appearances of that word to lowercase.

>
> - Section 5:
>  "Regulatory this is considered related to the safety and regularity"
>  Please consider rephrasing this sentence. It is not clear.



 We altered the sentence in chapter 5.2.4. for better understanding.

>
> - Section 8:
>  "FL and RL boundaries are aligned in time"
>  Please mention what is the method used for synchronizing the time.



 We clarified this now by adding a mention of LDACS
synchronization symbols in chapter 8.2. now.

>
> - Section 9:
>  Figure 2 presents the LDACS protocol stack, where IPv6 is
> illustrated above the SNP layer. It would be useful to have some text
> in Section 9.5 that explains how the SNP layer is connectedto the IPv6
> layer, and why IPv6 is used here (vs. IPv4).



 We added a paragraph clarifying the issue in chapter 7.3.
(second paragraph).

>
> - Section 10:
>  "Reasons for Wireless Digital Aeronautical Communications"
>  This title does not really fit the section - please consider
> rephrasing it.



 We changed it to Security in Wireless Digital Aeronautical
Communications and also changed the content of the section slightly to
fir the title. As we relocated some parts of the text to other sections
you can find this part now adressed within Section 9

>
> - Section 10.2:
>  Typo: LADACS ==> LDACS



 We changed this unfortunate typo. Keep in mind Section 10 is now
section 9 due to relocation of text parts.

>
> - Section 11:
>  "Privacy Considerations"
>  The text in this section is not related to privacy. I would suggest
> removingthis section completely.



 We removed this section.

>
> - Reference section:
>  Please review the "normative references" section. I would move all
> the references to "informative", unless you find that one of these is
> absolutely required as normative.



 We changed the order of bibliography: Now only regulatory
documents or the ICAO specification of LDACS are stated as normative
reference, while the rest has been declared informative references.

>
> - Please remove [RFC2119], as it is not used in the document.

    We removed unused references.


     

-- 
******************************************************

PD Dr. rer. nat. habil. Corinna Schmitt
Head of Secure IoT

Research Institute CODE
Universitt der Bundeswehr Mnchen

Werner-Heisenberg-Weg 39
85577 Neubiberg, Germany

Email: corinna.schmitt@unibw.de
https://www.unibw.de/code
https://www.corinna-schmitt.de


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<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html;
      charset=windows-1252">
  </head>
  <body>
    <p>Dear All, <br>
    </p>
    <p>thanks for the feedback. We addressed it and uploaded a new
      version a minute ago:
      <a class="moz-txt-link-freetext" href="https://www.ietf.org/archive/id/draft-ietf-raw-ldacs-09.html">https://www.ietf.org/archive/id/draft-ietf-raw-ldacs-09.html</a></p>
    <p>In order to identify the parts where we addressed the received
      feedback find it below in -line.</p>
    <p>Regards,</p>
    <p>Nils, Thomas, and Corinna<br>
    </p>
    <p><br>
    </p>
    <p><br>
    </p>
    <br>
    <blockquote type="cite"
      cite="mid:2241d509a34c48e9898347f80a68cb8c@dlr.de">
      <hr style="display:inline-block;width:98%" tabindex="-1">
      <div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
          face="Calibri, sans-serif" color="#000000"><b>Von:</b> Tal
          Mizrahi <a class="moz-txt-link-rfc2396E" href="mailto:tal.mizrahi.phd@gmail.com">&lt;tal.mizrahi.phd@gmail.com&gt;</a><br>
          <b>Gesendet:</b> Mittwoch, 1. September 2021 12:11:59<br>
          <b>An:</b> <a class="moz-txt-link-abbreviated" href="mailto:rtg-ads@ietf.org">rtg-ads@ietf.org</a>; <a class="moz-txt-link-abbreviated" href="mailto:draft-ietf-raw-ldacs@ietf.org">draft-ietf-raw-ldacs@ietf.org</a><br>
          <b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a class="moz-txt-link-abbreviated" href="mailto:last-call@ietf.org">last-call@ietf.org</a>; <a class="moz-txt-link-abbreviated" href="mailto:raw@ietf.org">raw@ietf.org</a><br>
          <b>Betreff:</b> RtgDir Last Call review: draft-ietf-raw-ldacs</font>
        <div></div>
      </div>
      <div>
        <div dir="ltr">
          <p
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            Hello,</p>
          <p
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            I have been selected as the Routing Directorate reviewer for
            this draft. The Routing Directorate seeks to review all
            routing or routing-related drafts as they pass through IETF
            last call and IESG review, and sometimes on special request.
            The purpose of the review is to provide assistance to the
            Routing ADs. For more information about the Routing
            Directorate, please see<a class="ext-link"
              href="http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir"
style="text-decoration-line:none;color:rgb(187,0,0);border-bottom:1px
              dotted rgb(187,187,187)" moz-do-not-send="true"><span
                class="gmail-icon"
                style="background:url(&quot;../extlink.gif&quot;) 0% 50%
                no-repeat;padding-left:15px"></span>http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir</a></p>
          <p
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            Although these comments are primarily for the use of the
            Routing ADs, it would be helpful if you could consider them
            along with any other IETF Last Call comments that you
            receive, and strive to resolve them through discussion or by
            updating the draft.</p>
          <p
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            Document:draft-ietf-raw-ldacs-08<br>
            Reviewer: Tal Mizrahi<br>
            Review Date: 2021-09-01<br>
            Intended Status: Informational</p>
          <p
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            <strong>Summary:</strong><br>
            I have some minor concerns about this document that I think
            should be resolved before publication.<br>
          </p>
          <p
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            <strong>Comments:</strong></p>
          <p
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            The draft provides an overview of the L-band Digital
            Aeronautical Communications System (LDACS), which is a
            work-in-progress standard by the ICAO standardization group.
            The draft is well-written, and is almost ready for
            publication, with a few comments that follow.</p>
          <p
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            <strong>Major Issues:</strong></p>
          <ul
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            <li>Although the abstract clearly explains that LDACS
              includes support for IPv6, the reader later learns that
              LDACs is mostly a Layer 2 technology, and that IPv6 over
              LDACS has not been defined yet. The document does not
              describe the connection between LDACS and IPv6, why IPv6
              was chosen (and not IPv4), and the challenges of using
              IPv6 over this technology. It would be worthwhileto add a
              paragraph or two about this to the introduction.<br>
            </li>
          </ul>
        </div>
      </div>
    </blockquote>
    <ul type="disc">
      <ul type="circle">
        <li class="MsoNormal"
          style="color:red;mso-margin-top-alt:auto;mso-margin-bottom-alt:
          auto;mso-list:l0 level2 lfo1;tab-stops:list 72.0pt"><span
            style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif"
            lang="EN-US">We mentioned further regulatory document such
            as ICAO Doc 9896, RTCA DO-379, EUROCAE ED-262 and ARINC P858
            all concerned with the foreseen ATN/IPS aeronautical
            communications backbone infrastructure in the introduction
            (Step (2) ...). IPv6 has been chosen as the basis for the
            ATN/IPS network and LDACS is a datalink access network
            technology from the view of ATN/IPS. This I highlighted also
            in the introduction.</span></li>
      </ul>
    </ul>
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      <div>
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          <ul
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            <li>
              <br>
            </li>
            <li>Specifically, it would be useful to add a paragraph
              that explains how LDACS is related to IETF protocols, and
              whether any work is expected in the IETF in this context.</li>
          </ul>
        </div>
      </div>
    </blockquote>
    <ul type="disc">
      <ul type="circle">
        <li class="MsoNormal"
          style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:
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style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;color:red"
            lang="EN-US">We added a paragraph at the end of the
            introduction, explaining the LDACS relevance in RAW and
            within the IETF.</span><span
            style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif"
            lang="EN-US"></span></li>
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    <blockquote type="cite"
      cite="mid:2241d509a34c48e9898347f80a68cb8c@dlr.de">
      <div>
        <div dir="ltr">
          <p
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            <strong>Other Issues:</strong></p>
          <ul
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            <li>Minor issues are concerns about clarity or technical
              accuracy that should be discussed and resolved before
              publication, but which would normally be resolved between
              the authors and the reviewers.</li>
            <li>Please include all of the minor issues you have found.
              Give as much context information as possible (e.g.,
              section numbers, paragraph counts).</li>
            <li>If you find no minor issues, please write: "No minor
              issues found."</li>
          </ul>
          <p
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            <strong>Nits:</strong></p>
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">- It
            would be useful to mention in the introduction in which
            parts of the world LDACS is expected to be deployed, and
            whether any geographical restrictions are expected in the
            context of this technology.</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
        </div>
      </div>
    </blockquote>
    <p class="MsoPlainText"
      style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:
      l0 level1 lfo1"><span style="font-family:Symbol;
mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;color:red"><span
          style="mso-list:Ignore"><span style="font:7.0pt &quot;Times
            New Roman&quot;">
          </span></span></span><span style="font-size:11.0pt;
font-family:&quot;Calibri&quot;,sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:
minor-latin;mso-bidi-theme-font:minor-latin;color:red;mso-ansi-language:EN-US"
        lang="EN-US">We
        addressed that in the introduction (Step (1)... Since central
        Europe has been
        identified as the area of the world, that suffers the most from
        increased
        saturation of the VHF band, the initial roll-out of LDACS will
        likely start
        there, and continue to other increasingly saturated zones as the
        east- and
        west-cost of the US and parts of Asia [ICAO2018]).</span><span
style="font-family:&quot;Calibri&quot;,sans-serif;mso-ascii-theme-font:minor-latin;
mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin;color:red"></span></p>
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    <blockquote type="cite"
      cite="mid:2241d509a34c48e9898347f80a68cb8c@dlr.de">
      <div>
        <div dir="ltr">
          <br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">-
            Throughout the document the word "shall" (lowercase) is used
            often. It is not clear whether this is because this text
            refers to the future tense, or whether because this is
            phrased as a requirement. I would suggest </span>to replace<span
style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream Vera
            Sans&quot;,Helvetica,sans-serif;font-size:13px"> the word
            "shall" by a different word, or to explain at the beginning
            what it means in this document.</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
        </div>
      </div>
    </blockquote>
    <p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0
      level1 lfo1"><span
        style="font-size:10.0pt;font-family:Symbol;mso-fareast-font-family:
        Symbol;mso-bidi-font-family:Symbol;color:red" lang="EN-US"><span
          style="mso-list:Ignore"><span style="font:7.0pt &quot;Times
            New Roman&quot;"> </span></span></span><span
style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;color:red"
        lang="EN-US">Apart
        from directly citing the security objectives in chapter 9.3. and
        from RTCA
        DO-350A document in the appendix A, we removed the word shall
        throughout the
        document.</span></p>
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    <blockquote type="cite"
      cite="mid:2241d509a34c48e9898347f80a68cb8c@dlr.de">
      <div>
        <div dir="ltr">
          <br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">-
            Abstract:
          </span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px"> "High
            reliability and availability for IP connectivity over LDACS
            are therefore essential."</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px"> It
            would be useful to also mention security in this sentence.</span><br
style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream Vera
            Sans&quot;,Helvetica,sans-serif;font-size:13px">
        </div>
      </div>
    </blockquote>
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        style="font-size:10.0pt;font-family:Symbol;mso-fareast-font-family:
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          style="mso-list:Ignore"><span style="font:7.0pt &quot;Times
            New Roman&quot;"> </span></span></span><span
style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;color:red"
        lang="EN-US">This
        is addressed now in the abstract.</span><span
        style="font-size:10.0pt;
        font-family:&quot;Verdana&quot;,sans-serif;color:black"
        lang="EN-US"></span></p>
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    <blockquote type="cite"
      cite="mid:2241d509a34c48e9898347f80a68cb8c@dlr.de">
      <div>
        <div dir="ltr">
          <br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">-
            Introduction:</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            "efficient aircraft control and safe separation"</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            Please clarify what you mean by separation (perhaps
            separation between entertainment system traffic and aircraft
            control traffic?).</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
        </div>
      </div>
    </blockquote>
    <blockquote>
      <span
        style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;
mso-ascii-theme-font:minor-latin;mso-fareast-font-family:Calibri;mso-fareast-theme-font:
minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin;
color:red;mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:
        AR-SA" lang="EN-US">We clarified that by clearly stating
        aircraft separation. This is a
        term is used and widely known in aeronautics for vertical and
        horizontal
        separation standards to facilitate the safe navigation of
        aircraft in
        controlled airspace [ICAO Doc 4444  Chapter 5].</span>
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    <blockquote type="cite"
      cite="mid:2241d509a34c48e9898347f80a68cb8c@dlr.de">
      <div>
        <div dir="ltr">
          <br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">-
            Introduction:</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px"> The
            following sentence is mentioned in Section 4. Maybe it would
            be useful in the introduction.
          </span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            "LDACS standardization within the framework of the ICAO
            started in</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            December 2016. The ICAO standardization group has produced
            an</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            initial Standards and Recommended Practices document
            [ICA2018]."</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
        </div>
      </div>
    </blockquote>
    <p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0
      level1 lfo1"><span
        style="font-size:10.0pt;font-family:Symbol;mso-fareast-font-family:
        Symbol;mso-bidi-font-family:Symbol;color:red" lang="EN-US"><span
          style="mso-list:Ignore"><span style="font:7.0pt &quot;Times
            New Roman&quot;"> </span></span></span><span
style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;color:red"
        lang="EN-US">Thank
        you for the note, we moved it to the end of the introduction</span></p>
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    <blockquote type="cite"
      cite="mid:2241d509a34c48e9898347f80a68cb8c@dlr.de">
      <div>
        <div dir="ltr">
          <br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">-
            Section 3:</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px"> The
            term "Business Communication" is used several times. It
            would be useful to define what this means.</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
        </div>
      </div>
    </blockquote>
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        color:black" lang="EN-US"></span></p>
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      level1 lfo1"><span
        style="font-size:10.0pt;font-family:Symbol;mso-fareast-font-family:
        Symbol;mso-bidi-font-family:Symbol;color:black" lang="EN-US"><span
          style="mso-list:Ignore"><span style="font:7.0pt &quot;Times
            New Roman&quot;"> </span></span></span><span
style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;color:red"
        lang="EN-US">We
        added a short explanatory sentence in chapter 3 for a clear
        definition of the
        term.</span><span
        style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;
        color:black" lang="EN-US"></span></p>
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      cite="mid:2241d509a34c48e9898347f80a68cb8c@dlr.de">
      <div>
        <div dir="ltr">
          <br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">-
            Section 5:</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px"> The
            word "RECOMMENDS" (uppercase) is used here. This is not a
            standard RFC2119 key word. Please change it to lowercase.</span><br
style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream Vera
            Sans&quot;,Helvetica,sans-serif;font-size:13px">
        </div>
      </div>
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            New Roman&quot;"> </span></span></span><span
style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;color:red"
        lang="EN-US">We
        changed all appearances of that word to lowercase.</span></p>
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    <blockquote type="cite"
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      <div>
        <div dir="ltr">
          <br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">-
            Section 5:</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            "Regulatory this is considered related to the safety and
            regularity"</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            Please consider rephrasing this sentence. It is not clear.</span><br
style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream Vera
            Sans&quot;,Helvetica,sans-serif;font-size:13px">
        </div>
      </div>
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          style="mso-list:Ignore"><span style="font:7.0pt &quot;Times
            New Roman&quot;"> </span></span></span><span
style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;color:red"
        lang="EN-US">We
        altered the sentence in chapter 5.2.4. for better understanding.</span></p>
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    <blockquote type="cite"
      cite="mid:2241d509a34c48e9898347f80a68cb8c@dlr.de">
      <div>
        <div dir="ltr">
          <br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">-
            Section 8:</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px"> "FL
            and RL boundaries are aligned in time"</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            Please mention what is the method used for synchronizing the
            time.</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
        </div>
      </div>
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        style="font-size:10.0pt;font-family:Symbol;mso-fareast-font-family:
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          style="mso-list:Ignore"><span style="font:7.0pt &quot;Times
            New Roman&quot;"> </span></span></span><span
style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;color:red"
        lang="EN-US">We
        clarified this now by adding a mention of LDACS synchronization
        symbols in
        chapter 8.2. now.</span></p>
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    <blockquote type="cite"
      cite="mid:2241d509a34c48e9898347f80a68cb8c@dlr.de">
      <div>
        <div dir="ltr">
          <br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">-
            Section 9:</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            Figure 2 presents the LDACS protocol stack, where IPv6 is
            illustrated above the SNP layer. It would be useful to have
            some text in Section 9.5 that explains how the SNP layer is
          </span>connected<span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px"> to the
            IPv6 layer, and why IPv6 is used here (vs. IPv4).</span><br
style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream Vera
            Sans&quot;,Helvetica,sans-serif;font-size:13px">
        </div>
      </div>
    </blockquote>
    <p class="MsoNormal"><span
        style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;
        color:black" lang="EN-US"></span></p>
    <p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0
      level1 lfo1"><span
        style="font-size:10.0pt;font-family:Symbol;mso-fareast-font-family:
        Symbol;mso-bidi-font-family:Symbol;color:black" lang="EN-US"><span
          style="mso-list:Ignore"><span style="font:7.0pt &quot;Times
            New Roman&quot;"> </span></span></span><span
style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;color:red"
        lang="EN-US">We
        added a paragraph clarifying the issue in chapter 7.3. (second
        paragraph).</span><span
style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;color:black"
        lang="EN-US"></span></p>
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    <blockquote type="cite"
      cite="mid:2241d509a34c48e9898347f80a68cb8c@dlr.de">
      <div>
        <div dir="ltr">
          <br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">-
            Section 10:</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            "Reasons for Wireless Digital Aeronautical Communications"</span><br
style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream Vera
            Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px"> This
            title does not really fit the section - please consider
            rephrasing it.</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
        </div>
      </div>
    </blockquote>
    <p class="MsoNormal"><span
        style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;
        color:black" lang="EN-US"></span></p>
    <p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0
      level1 lfo1"><span
style="font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol;color:black"
        lang="EN-US"><span style="mso-list:Ignore"><span
            style="font:7.0pt &quot;Times New Roman&quot;">
          </span></span></span><span style="mso-ascii-font-family:
Calibri;mso-ascii-theme-font:minor-latin;mso-hansi-font-family:Calibri;
mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
        minor-latin;color:red" lang="EN-US">We changed it to Security
        in Wireless Digital
        Aeronautical Communications and also changed the content of the
        section
        slightly to fir the title. As we relocated some parts of the
        text to other sections you can find this part now adressed
        within Section 9</span><span style="mso-ascii-font-family:
Calibri;mso-ascii-theme-font:minor-latin;mso-hansi-font-family:Calibri;
mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:
        minor-latin;color:black" lang="EN-US"></span></p>
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	mso-hansi-theme-font:minor-latin;
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    <blockquote type="cite"
      cite="mid:2241d509a34c48e9898347f80a68cb8c@dlr.de">
      <div>
        <div dir="ltr">
          <br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">-
            Section 10.2:</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px"> Typo:
            LADACS ==&gt; LDACS</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
        </div>
      </div>
    </blockquote>
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        style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;
        color:black" lang="EN-US"></span></p>
    <p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0
      level1 lfo1"><span
        style="font-size:10.0pt;font-family:Symbol;mso-fareast-font-family:
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          style="mso-list:Ignore"><span style="font:7.0pt &quot;Times
            New Roman&quot;"> </span></span></span><span
style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;color:red"
        lang="EN-US">We
        changed this unfortunate typo. Keep in mind Section 10 is now
        section 9 due to relocation of text parts.<br>
      </span></p>
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    <blockquote type="cite"
      cite="mid:2241d509a34c48e9898347f80a68cb8c@dlr.de">
      <div>
        <div dir="ltr">
          <br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">-
            Section 11:</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            "Privacy Considerations"</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px"> The
            text in this section is not related to privacy. I would
            suggest
          </span>removing<span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px"> this
            section completely.</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
        </div>
      </div>
    </blockquote>
    <p class="MsoNormal"><span
        style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;
        color:black" lang="EN-US"></span></p>
    <p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0
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        style="font-size:10.0pt;font-family:Symbol;mso-fareast-font-family:
        Symbol;mso-bidi-font-family:Symbol;color:red" lang="EN-US"><span
          style="mso-list:Ignore"><span style="font:7.0pt &quot;Times
            New Roman&quot;"> </span></span></span><span
style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;color:red"
        lang="EN-US">We
        removed this section.</span></p>
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    <blockquote type="cite"
      cite="mid:2241d509a34c48e9898347f80a68cb8c@dlr.de">
      <div>
        <div dir="ltr">
          <br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">-
            Reference section:</span><br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
            Please review the "normative references" section. I would
            move all the references to "informative", unless you find
            that one of these is absolutely required as normative. </span><br
style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream Vera
            Sans&quot;,Helvetica,sans-serif;font-size:13px">
        </div>
      </div>
    </blockquote>
    <p class="MsoNormal"><span
        style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;
        color:black" lang="EN-US"></span></p>
    <p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0
      level1 lfo1"><span
        style="font-size:10.0pt;font-family:Symbol;mso-fareast-font-family:
        Symbol;mso-bidi-font-family:Symbol;color:black" lang="EN-US"><span
          style="mso-list:Ignore"><span style="font:7.0pt &quot;Times
            New Roman&quot;"> </span></span></span><span
style="font-size:10.0pt;font-family:&quot;Verdana&quot;,sans-serif;color:red"
        lang="EN-US">We
        changed the order of bibliography: Now only regulatory documents
        or the ICAO specification
        of LDACS are stated as normative reference, while the rest has
        been declared
        informative references.</span><span style="font-size:10.0pt;
        font-family:&quot;Verdana&quot;,sans-serif;color:black"
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    <blockquote type="cite"
      cite="mid:2241d509a34c48e9898347f80a68cb8c@dlr.de">
      <div>
        <div dir="ltr">
          <br
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">
          <span
            style="color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream
            Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">-
            Please remove [RFC2119], as it is not used in the document.</span><br>
        </div>
      </div>
    </blockquote>
    <blockquote>
      <span
        style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;
mso-fareast-font-family:Calibri;mso-fareast-theme-font:minor-latin;color:red;
mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA"
        lang="EN-US">We
        removed unused references.<br>
        <br>
        <br>
      </span>
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    <pre class="moz-signature" cols="72">-- 
******************************************************

PD Dr. rer. nat. habil. Corinna Schmitt
Head of Secure IoT

Research Institute CODE
Universitt der Bundeswehr Mnchen

Werner-Heisenberg-Weg 39
85577 Neubiberg, Germany

Email: <a class="moz-txt-link-abbreviated" href="mailto:corinna.schmitt@unibw.de">corinna.schmitt@unibw.de</a>
<a class="moz-txt-link-freetext" href="https://www.unibw.de/code">https://www.unibw.de/code</a>
<a class="moz-txt-link-freetext" href="https://www.corinna-schmitt.de">https://www.corinna-schmitt.de</a></pre>
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Subject: [RTG-DIR] RtgDir Last Call review: draft-ietf-bess-pbb-evpn-isid-cmacflush
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Hello,

I have been selected as the Routing Directorate reviewer for this draft. =
The Routing Directorate seeks to review all routing or routing-related =
drafts as they pass through IETF last call and IESG review, and =
sometimes on special request. The purpose of the review is to provide =
assistance to the Routing ADs. For more information about the Routing =
Directorate, please see =
=E2=80=8Bhttp://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir

Although these comments are primarily for the use of the Routing ADs, it =
would be helpful if you could consider them along with any other IETF =
Last Call comments that you receive, and strive to resolve them through =
discussion or by updating the draft.

Document: draft-ietf-bess-pbb-evpn-isid-cmacflush
Reviewer: Russ White
Review Date: 22 October 2021
Intended Status: Standards Track

=3D=3D
Summary:

This document is basically ready for publication but has nits that =
should be considered prior to publication. Overall, the document is =
readable--the labeling and layout of the diagrams can be confusing, =
however (see notes below on figure 1). The flow of the document is fine, =
and the solution description seems to be sufficient for a reader with =
knowledge of PBB and eVPN to understand what is being done to resolve =
the problem.

Major Issues:

None.

Minor Issues:

Based on the description given for figure 1, it seems that ISID1 is a =
single device connected once to CE1, once to CE2, and once to CE3. In =
turn, CE3 apparently has two connections into the PBB-eVPN network. If =
this is all correct, then I find the diagram confusing.=20

ISID1 appears to be a _label_ for the three CE devices, rather than =
connected to them ... or are the three CE's actually the same device as =
ISID1? Or is ISID1 a different device, connected (according to the =
labels) to an MPLS Ag network and a G.8032 access ring? This =
configuration seems a little odd to me.

The connectivity shown between PE3, PE4, and CE3 is not clear. Are there =
two links from PE3 and CE3, or one? If there is one, why are there two =
different sets of lines, one of which is labeled "vES null," and the =
other labeled with the state of the connection (act or stb)? What is the =
significance of this particular connection layout?=20

The terms "act" and "stb" are not used anywhere in the text; in theory, =
somewhere above when the word "standby" is used, it would have a note =
saying "denoted as stb in the diagram below," or something similar. =
Otherwise, the reader is left trying to understand what the labels "act" =
and "stb" mean.

What is the significance of the "MPLS Ag Network" in the lower right =
corner of the diagram? If this is supposed to label the part of the =
network which is not PBB-eVPN, then shouldn't it be below the diagram, =
similar to how the label for the PBB-eVPN network is above the network? =
Is there any reason that it matters for this use case that the vES null =
attached PEs or devices are part of some other MPLS network? Could they =
just be part of a plain IP network? It seems to me, reading the text, =
that the impact would be the same even if these devices were part of a =
plain IP network?

I see, on the right side, the label "MPLS Ag," and (possibly) a =
corresponding label on the left side saying "G.8032 Access Ring." It =
seems a bit odd that the label for the PBB-eVPN network is above the =
diagram, but these two labels, which appear to refer to other parts of =
the network appear to be incorprated into the diagram itself (?). Why =
this difference? If these are denoting different parts of the network, =
it would help the reader understand the diagram better if they were all =
in the same location in the diagram (?).

Are the kinds of network outside the PBB-eVPN network important? Does it =
matter if one of the two connections from ISID1 (I'm assuming there's a =
single device here) is through an MPLS network of some other type, and =
its other connections is through an access ring? Would it make any =
difference if the entire diagram were simplified to show a single device =
connected via plain Ethernet in three different places, one of which has =
redudant links into the PBB-eVPN network? I understand there is =
underlying resilience in these different technologies, but I'm not =
certain how that impacts the operation of the mechanism described in the =
draft.

Nits:

4b is missing a "T."


=3D=3D

:-) /r


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Reviewer: Stig Venaas
Review result: Ready

Hello,

I have been selected as the Routing Directorate reviewer for this draft. The
Routing Directorate seeks to review all routing or routing-related drafts as
they pass through IETF last call and IESG review, and sometimes on special
request. The purpose of the review is to provide assistance to the Routing ADs.
For more information about the Routing Directorate, please see
​http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir

Although these comments are primarily for the use of the Routing ADs, it would
be helpful if you could consider them along with any other IETF Last Call
comments that you receive, and strive to resolve them through discussion or by
updating the draft.

Summary:
No issues found. This document is ready for publication.

Comments:
The draft is easy to read and no nits or issues found.

Major issues:
No major issues found.

Minor issues:
No minor issues found.




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From: Andy Smith via Datatracker <noreply@ietf.org>
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Reviewer: Andy Smith
Review result: Ready

Hello,

I have been selected as the Routing Directorate reviewer for this draft. The
Routing Directorate seeks to review all routing or routing-related drafts as
they pass through IETF last call and IESG review, and sometimes on special
request. The purpose of the review is to provide assistance to the Routing ADs.
For more information about the Routing Directorate, please see
​http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir

Although these comments are primarily for the use of the Routing ADs, it would
be helpful if you could consider them along with any other IETF Last Call
comments that you receive, and strive to resolve them through discussion or by
updating the draft.

Document: draft-ietf-pim-bfd-p2mp-use-case
Reviewer: Andy Smith
Review Date: 24 October 2021
IETF LC End Date:
Intended Status: Standards Track

Summary:

No issues found. This document is ready for publication.

Comments:

Well written document, easy to follow, solves an interesting problem in a novel
and innovative way.

Major Issues:

No major issues found.

Minor Issues:

No minor issues found.




From nobody Tue Oct 26 12:02:35 2021
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Tue, 26 Oct 2021 12:01:12 -0700
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--0000000000008df5f805cf461ab0
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Hi Andy,
thank you for the review and your kind words.

Regards,
Greg

On Tue, Oct 26, 2021, 11:50 Andy Smith via Datatracker <noreply@ietf.org>
wrote:

> Reviewer: Andy Smith
> Review result: Ready
>
> Hello,
>
> I have been selected as the Routing Directorate reviewer for this draft.
> The
> Routing Directorate seeks to review all routing or routing-related drafts
> as
> they pass through IETF last call and IESG review, and sometimes on specia=
l
> request. The purpose of the review is to provide assistance to the Routin=
g
> ADs.
> For more information about the Routing Directorate, please see
> =E2=80=8Bhttp://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir
>
> Although these comments are primarily for the use of the Routing ADs, it
> would
> be helpful if you could consider them along with any other IETF Last Call
> comments that you receive, and strive to resolve them through discussion
> or by
> updating the draft.
>
> Document: draft-ietf-pim-bfd-p2mp-use-case
> Reviewer: Andy Smith
> Review Date: 24 October 2021
> IETF LC End Date:
> Intended Status: Standards Track
>
> Summary:
>
> No issues found. This document is ready for publication.
>
> Comments:
>
> Well written document, easy to follow, solves an interesting problem in a
> novel
> and innovative way.
>
> Major Issues:
>
> No major issues found.
>
> Minor Issues:
>
> No minor issues found.
>
>
>
>

--0000000000008df5f805cf461ab0
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<div dir=3D"auto">Hi=C2=A0Andy,<div dir=3D"auto">thank you for the review a=
nd your kind=C2=A0words.=C2=A0</div><div dir=3D"auto"><br></div><div dir=3D=
"auto">Regards,</div><div dir=3D"auto">Greg</div></div><br><div class=3D"gm=
ail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, Oct 26, 2021, 11:5=
0 Andy Smith via Datatracker &lt;<a href=3D"mailto:noreply@ietf.org">norepl=
y@ietf.org</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Reviewer=
: Andy Smith<br>
Review result: Ready<br>
<br>
Hello,<br>
<br>
I have been selected as the Routing Directorate reviewer for this draft. Th=
e<br>
Routing Directorate seeks to review all routing or routing-related drafts a=
s<br>
they pass through IETF last call and IESG review, and sometimes on special<=
br>
request. The purpose of the review is to provide assistance to the Routing =
ADs.<br>
For more information about the Routing Directorate, please see<br>
=E2=80=8B<a href=3D"http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir" r=
el=3D"noreferrer noreferrer" target=3D"_blank">http://trac.tools.ietf.org/a=
rea/rtg/trac/wiki/RtgDir</a><br>
<br>
Although these comments are primarily for the use of the Routing ADs, it wo=
uld<br>
be helpful if you could consider them along with any other IETF Last Call<b=
r>
comments that you receive, and strive to resolve them through discussion or=
 by<br>
updating the draft.<br>
<br>
Document: draft-ietf-pim-bfd-p2mp-use-case<br>
Reviewer: Andy Smith<br>
Review Date: 24 October 2021<br>
IETF LC End Date:<br>
Intended Status: Standards Track<br>
<br>
Summary:<br>
<br>
No issues found. This document is ready for publication.<br>
<br>
Comments:<br>
<br>
Well written document, easy to follow, solves an interesting problem in a n=
ovel<br>
and innovative way.<br>
<br>
Major Issues:<br>
<br>
No major issues found.<br>
<br>
Minor Issues:<br>
<br>
No minor issues found.<br>
<br>
<br>
<br>
</blockquote></div>

--0000000000008df5f805cf461ab0--


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Dear Stig,
I would like to expand the section of "Security considerations" to the following text:
A misbehaving node from within the SFC-enabled domain may alter the content of the Context Headers, which may lead to service disruption.  Such an attack is not unique to the Context Headers defined in this document. Measures discussed in Section 8 of [RFC8300] describes the general security considerations for protecting NSH.  [I-D.ietf-sfc-nsh-integrity] specifies methods of protecting the integrity of the NSH metadata. If the NSH includes the MAC Context Header, the authentication of the packet MUST be verified before using any data. If the verification fails, the receiver MUST stop processing the variable length context headers and notify an operator.  

Please review if this could resolve your comments.
Thanks!



Best Regards,
Yuehua Wei
M: +86 13851460269 E: wei.yuehua@zte.com.cn
------------------原始邮件------------------
发件人：StigVenaasviaDatatracker
收件人：rtg-dir@ietf.org;
抄送人：last-call@ietf.org;draft-ietf-sfc-nsh-tlv.all@ietf.org;sfc@ietf.org;
日 期 ：2021年09月30日 08:16
主 题 ：[sfc] Rtgdir last call review of draft-ietf-sfc-nsh-tlv-08
Reviewer: Stig Venaas
Review result: Has Issues
Summary:
The document is easy to read and in a good shape.
I have some minor concerns about this document that I think should be resolved
before publication.
Comments:
The document is quite good and easy to read. My only concern is the security
considerations that are rather brief.
Major Issues:
No major issues found.
Minor Issues:
The Security considerations might need more details.
Are there any concerns about incorrect metadata? What are the consequences of
metadata being wrong intentionally, or by accident. When should integrity
protection be used?
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