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From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
To: "Joel M. Halpern" <jmh@joelhalpern.com>
CC: "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "draft-ietf-spring-oam-usecase.all@ietf.org" <draft-ietf-spring-oam-usecase.all@ietf.org>
Thread-Topic: Rtgdir last call review of draft-ietf-spring-oam-usecase-06
Thread-Index: AQHS61uWxVbWnw4SLk2wgKSt4LG4WKI/xD6A
Date: Sat, 1 Jul 2017 20:52:29 +0000
Message-ID: <6B35D999-331B-4DB3-A9F1-C2BEF4EC0944@cisco.com>
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Subject: Re: [RTG-DIR] Rtgdir last call review of draft-ietf-spring-oam-usecase-06
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--_000_6B35D999331B4DB3A9F1C2BEF4EC0944ciscocom_--


From nobody Sat Jul  1 14:07:05 2017
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To: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
Cc: "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "draft-ietf-spring-oam-usecase.all@ietf.org" <draft-ietf-spring-oam-usecase.all@ietf.org>
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From: "Joel M. Halpern" <jmh@joelhalpern.com>
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Date: Sat, 1 Jul 2017 17:07:01 -0400
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Subject: Re: [RTG-DIR] Rtgdir last call review of draft-ietf-spring-oam-usecase-06
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Almost.
I believe the earlier email had agreed to replace pre-SR with non-SR. 
There are two uses of pre-SR stil in the document.

Otherwise, yes, these address my comments.

Yours,
Joel

On 7/1/17 4:52 PM, Carlos Pignataro (cpignata) wrote:
> Thanks for your review, Joel!
> 
> Revision -07, just submitted, should address all your concerns and 
> suggestions. Please let us know otherwise.
> 
> Thanks,
> 
> — Carlos.
> 
>> On Jun 22, 2017, at 9:29 AM, Joel Halpern <jmh@joelhalpern.com 
>> <mailto:jmh@joelhalpern.com>> wrote:
>>
>> Reviewer: Joel Halpern
>> Review result: Has Nits
>>
>> This is a rtg-dir requested review.
>>
>> Summary: Ready for publication as an Informational RFC with some minor 
>> items
>> that should be considered.
>>
>> Major: N/A
>>
>> Minor:
>>    The introduction treats having a single centralized monitoring 
>> system as an
>>    unalloyed positive.  To set context properly, it would seem more
>>    appropriate to note that many operators find such central systems 
>> useful,
>>    and the approach described here enables that when desired.
>>
>>    The reference in the introduction to IGP topology discovery is very
>>    confusing. "Adding MPLS topology awareness to an IGP speaking 
>> device hence
>>    enables a simple and scalable data plane based monitoring 
>> mechanism."  As
>>    noted later in the document, link-state IGPs provide topology 
>> awareness.
>>    So what is this part of the introduction trying to say? 
>>  (Side-note, not
>>    all IGPs are link state, although the applicability of Babel or RIP 
>> to MPLS
>>    Segment Routing is clearly outside the scope of this document.)
>>
>>    In section 5.1 in discussing path trace the reference is to RFC 
>> 4379 which
>>    is a clear source for path trace.  However, the text refers to "tree
>>    trace".  While that may have become a common phrase for the usage, 
>> it is
>>    not used in RFC 4379.  The term should either be explain, include a
>>    suitable reference, or not be used.
>>
>>   In section 5.3 on fault isolation, the text notes that the only 
>> difference
>>   between the test which succeeds and that which fails is the 
>> difference the
>>   the adjacency SID.  The text then goes on to say "Assuming the 
>> second probe
>>   has been routed correctly, the fault must have been occurring in R2 
>> which
>>   didn't forward the packet to the interface identified by its 
>> Adjacency SID
>>   663."  That does not follow.  If the link as failed in an undetected 
>> fashion
>>   (either in one direction or both), R2 would be functioning fine and the
>>   symptom would be the same.  Remotely detecting the difference between R2
>>   failing to forward and the link not working seems a much harder task.
>>
>>    The claim that the PMS can / should (intent is ambiguous) notify 
>> the router
>>    when it detects a path failure raises a number of issues.   It is 
>> not at
>>    all clear what the router would do with the notification.  (e.g. If it
>>    removed the link from service, then future monitoring would not be 
>> able to
>>    detect that the link was working.)  Either this needs to become a
>>    significantly larger section, or (more likely) the text needs to be 
>> removed.
>>
>> Editorial:
>>    Chapter 7 is titled dealing with non-SR environments.  Which makes 
>> sense.
>>    The text then switches to using "pre-SR" instead of "non-SR".  I would
>>    recommend that all uses of "pre-SR" be changed to "non-SR".
>>
> 
> —
> Carlos Pignataro, carlos@cisco.com <mailto:carlos@cisco.com>
> 
> /“Sometimes I use big words that I do not fully understand, to make 
> myself sound more photosynthesis."/
> 


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From: Dieter Beller <Dieter.Beller@nokia.com>
To: bruno.decraene@orange.com, "rtg-ads@ietf.org" <rtg-ads@ietf.org>
Cc: "teas@ietf.org" <teas@ietf.org>, "draft-ietf-teas-lsp-diversity@ietf.org" <draft-ietf-teas-lsp-diversity@ietf.org>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "BRUNGARD, DEBORAH A (ATTSI)" <db3546@att.com>
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Organization: Nokia
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Date: Sun, 2 Jul 2017 11:56:51 +0200
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/N0BSe8md2QT26hR0mhiZIuHHzCA>
Subject: Re: [RTG-DIR] Rtgdir Last Call Review of draft-ietf-teas-lsp-diversity-07
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    Hi Buno, all,<br>
    <br>
    please find our response to your comments inline below.<br>
    <br>
    We have just submitted the 08-version of the draft - see:
    <a class="moz-txt-link-freetext" href="https://datatracker.ietf.org/doc/draft-ietf-teas-lsp-diversity/">https://datatracker.ietf.org/doc/draft-ietf-teas-lsp-diversity/</a><br>
    <br>
    Please don't hesitate to further discuss with us your review
    comments that did not yet result in document changes.<br>
    <br>
    <br>
    Thanks,<br>
    Dieter and co-authors<br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 23.05.2017 17:18, <a
        class="moz-txt-link-abbreviated"
        href="mailto:bruno.decraene@orange.com">bruno.decraene@orange.com</a>
      wrote:<br>
    </div>
    <blockquote type="cite"
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      <div class="WordSection1">
        <p><span lang="EN-US">Hello, <o:p></o:p></span></p>
        <p><span lang="EN-US">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 </span><a
            href="http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir"
            moz-do-not-send="true"><span class="icon"><span
                style="color:blue" lang="EN-US">​</span></span><span
              lang="EN-US">http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir</span></a>
          <span lang="EN-US"><o:p></o:p></span></p>
        <p><span lang="EN-US">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. <o:p></o:p></span></p>
        <p><span lang="EN-US">Document: draft-ietf-teas-lsp-diversity-07<br>
            Reviewer: Bruno Decraene <br>
            Review Date: 2017/05/23 <br>
            IETF LC End Date: not initiated AFAIK <br>
            Intended Status: Standard Track<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
              style="font-size:12.0pt;font-family:&quot;Times New
              Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
              lang="EN-US">Summary:</span></b><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"> <br>
            I have some minor concerns about this document that I think
            should be resolved before publication. <o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
              style="font-size:12.0pt;font-family:&quot;Times New
              Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR">Comments:</span></b><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"> <o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">I have only very basic knowledge of RSVP-TE and
            none of GMPLS. I found the document very clear. Thank you.<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
              style="font-size:12.0pt;font-family:&quot;Times New
              Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
              lang="EN-US">Major Issues:</span></b><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">  None<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
              style="font-size:12.0pt;font-family:&quot;Times New
              Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
              lang="EN-US">Minor Issues:</span></b><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"> <o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">To provide diversity, my understanding is that
            the signaling of the second LSP is extended to detect the
            crossing of the first path, and then is re-routed to avoid
            it. In some cases, I guess that providing path diversity is
            not possible without re-routing the first path. It's not
            clear to me how this is possible with this proposition.</span></p>
      </div>
    </blockquote>
    <br>
    You comment is indeed a valid. Our assumption, however,  was that
    the two LSPs are requested sequentially and there can be a longer
    period of time<br>
    between the UNI request for the first LSP and the UNI request for
    the second LSP (days, weeks, months). This draft provides a UNI
    signaling solution<br>
    that allows an Edge Node (EN) to signal a diversity constraint to
    the ingress Core Node (CN) when it requests the 2nd LSP such that
    path computation<br>
    can take this diversity constraint into account. Re-routing the
    first LSP that may already exist for a longer period of time was not
    considered.<br>
    Depending on the technology of the core network, re-routing the
    first LSP may not be desired because it may not be possible  without
    a traffic<br>
    disruption (e.g. in WDM transport networks). <br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"> If it’s not, this limitation should probably
            be highlighted somewhere in the document. (and if it is,
            sorry for having missed it). Especially since this case seem
            to be in scope as per the Introduction: "Similarly, an LSP
            from EN2 to EN3 traversing CN1 needs to be diverse from an
            LSP from EN2 to EN3 going via CN4. [...]  This document
            addresses these diversity requirements "</span></p>
      </div>
    </blockquote>
    <br>
    We deliberately did not take any assumption whether the a PCE is
    used or whether path computation is done in a distributed way. If
    distributed path<br>
    computation was used coordination between the path computation
    functions would be be required, which is an assumption that may not
    be true. Therefore, we also assumed that the 2 LSPs are signaled
    sequentially, one after the other.<br>
    <br>
    See updated abstract.<br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">-----<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">§1.1 <o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">"There are scenarios in which the ENs have the
            following requirements"<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">OK. Are there other scenario? (seem so as per
            the wording). What are their requirements and why aren’t
            they considered?</span></p>
      </div>
    </blockquote>
    <br>
    Requirements in section 1.1 removed - was helpul fwhile the
    solutions were developed.<br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">-----<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">"-  Both client and server understand the
            identifier."<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">Not sure what is meant by "understand". At this
            step, it's not clear why the identifier can't be an any
            number/string that no one understand but is treated as an
            opaque value/identifier. </span></p>
      </div>
    </blockquote>
    <br>
    Requirements in section 1.1 removed - was helpul while the solutions
    were developed.<br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">-----<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">"The identifier is to be stable for a long
            period of time."<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">Easy comment but "long" is not very specific
            and different person may have different interpretation. I
            guess that the goal is that the identifier be stable for the
            duration of the diversity requirement. </span></p>
      </div>
    </blockquote>
    <br>
    Requirements in section 1.1 removed - was helpul while the solutions
    were developed.<br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">-----<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">" These requirements are met by using the LSP
            identifier. The LSP<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">      identifier uniquely identifies an LSP in
            the network and<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">      comprises of the following fields:
            IPv4/IPv6 tunnel sender<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">      address, IPv4/IPv6 tunnel end point
            address, Tunnel ID, LSP ID,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">      and Extended Tunnel ID. These fields are
            defined in [RFC3209],<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">      sections 4.6.1.1 and 4.6.2.1."<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">It's not clear to me that this choice meet the
            requirements. As per my quick reading of RFC 3209, Tunnel ID
            remains constant for the lifetime of a tunnel. If the node
            (e.g. EN1) reboot, it seems plausible that this Tunnel ID be
            changed. That seems to be an issue given that this
            identifier seems to be statically configured on the other
            node (e.g. EN2)</span></p>
      </div>
    </blockquote>
    <br>
    According to our understanding, the Tunnel ID remains unchanged for
    the lifetime of an LSP. All implementations, the authors are aware
    of, store the<br>
    Tunnel ID in a persistent data base. This guarantees that the Tunnel
    ID does not change after a node restart.<br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">----<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">"In order to<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">      maintain diversity between these two
            connections within the core<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">      network, it is assumed that the core
            network implements Crankback<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">      Signaling [RFC4920]."<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">Don't you mean :s/assume/REQUIRED  ?  </span></p>
      </div>
    </blockquote>
    <br>
    Changed as suggested.<br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">----<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">§1.2 PCE-allocated Identifier<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">If PCE is used to compute the paths, paths
            diversity needs to be handled by the PCE (to compute diverse
            paths). In which case, the problem seems to be solved with
            no need for further RSVP-TE extensions.<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">Figure 2 seem to illustrate that this section
            seem to consider the case where PCE is only partially used
            (in one domain). This is not stated at the beginning of 1.2
            hence this does not help the reader to understand the case
            really being considered.</span></p>
      </div>
    </blockquote>
    <br>
    Maybe Figure 2 is a bit misleading as it shows a different scenario
    (multi-domain) compared to Figure 1. Using Figure 1 as reference,
    the assumption is<br>
    again that the EN uses RSVP signaling to setup two LSPs that shall
    follow divers paths in the core network. This means that two
    different core nodes,<br>
    let' say CN1 and CN4 will receive the PATH messages for two LSP and
    it will be the centralized PCE that has to deal with the diversity
    constraint. In the<br>
    PCE case, the existing Path Key subobject is (re-)used to allow a
    client network EN to request a 2nd LSP with the Path Key subobject
    included that<br>
    indicates towards the PCE that the path for the 2nd shall be divers
    w.r.t. the LSP associated with the Path Key.<br>
    <br>
    Would you suggest to change Figure 2 and align it with Figure 1?
    However, this would also require to align the text with the new
    figure.<br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">----<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">§1.3<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">"the concept of a Path Affinity Set (PAS) is
            defined for abstracting SRLG information." <o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">It's not clear to me how the second node (EN2
            using the example from the introduction) is communicated
            this PAS from EN1, and how it's kept up to date as the path
            used by EN1 may change.<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">IOW, this PAS does not seem to fulfill the 3
            latest requirements listed in 1.1:<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">"       -  It is necessary to be able to
            reference the identifier even if the LSP referenced by it is
            not yet signaled.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">        -  The identifier is to be stable for a
            long period of time.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">        -  The identifier is to be stable even
            when the referenced LSP is rerouted."<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">It's not clear to me what benefits this PAS
            brings compared to the client initiated identifier. While it
            adds the above disadvantages.</span></p>
      </div>
    </blockquote>
    <br>
    The draft addresses 3 use cases, where for the use cases 2 and 3 the
    network assigns the identifiers that are used to achieve diversity
    between LSPs:<br>
    <ol>
      <li>The client assigns a unique diversity identifier to the LSP.</li>
      <li>In case a PCE is used (centralized patch computation), the PCE
        assigns a Path Key to the LSPs<br>
      </li>
      <li>In case of distributed routing and path computation, the path
        computation function assigns a PAS to the LSPs. The assigned
        PASes and the<br>
        related path computation constraints (e.g. list of SRLGs) have
        to disseminated in the network such that all path computation
        instances have<br>
        that information and can calculate a path for a new LSP that
        meets the requested diversity constraints.</li>
    </ol>
    <br>
    So, the PAS approach is needed to ahave a complete solution for the
    problem addressed in this draft.<br>
    <br>
    Please let us know if you have further comments or suggestions how
    the document can be improved. <br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">---<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">"The means by which the processing node
            determines the path corresponding to the PAS is beyond the
            scope of this document."<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">But this doesn't remove the problem to be
            solved. You seem to assume that there is one single
            database, typically centralized. An alternative option may
            have been to cypher the "detailled SRLG list". Why has this
            option been discarded?</span></p>
      </div>
    </blockquote>
    <br>
    The PAS-based solution has been defined when distributed routing and
    path computation is used in the core network. This means that the
    PAS<br>
    information is preferably disseminated into the network by the IGP
    (e.g. OSPF-TE) such that all nodes have the information. An
    alternative solution<br>
    could be that the PAS information is managed by a centralized
    entity. Encrypting SRLG information was not considered. RFC8001 can
    be used to<br>
    exchange SRLG information in an non-encrypted form.<br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">"The means to distribute the PAS information
            within the core network is beyond the scope of this
            document. For example, the<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">      PAS and the associated SRLG information
            can be distributed within the core network by an Interior
            Gateway Protocol (IGP) or by other means such as
            configuration."<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">I don't think the use of the IGP would be such
            a good fit, in term of frequency of update (ok, this is
            deployment dependent) and scalability (a priori the number
            of PAS is o(N^2), N being Core Nodes.)</span></p>
      </div>
    </blockquote>
    <br>
    The number of PAS instances depends on the number of LSPs in the
    network that shall meet diversity constraints signaled by the client
    network that<br>
    does not know the topology of the core network (UNI).<br>
    <br>
    If LSPs are for example protected inside the core network, diversity
    can be achieved without a PAS.<br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">---<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">Abstract: " This document specifies three new
            route exclusion types."<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">From the IANA section and the document ToC, I'm
            seen only 2 types: "IPv4 Diversity subobject", "IPv6
            Diversity subobject"</span></p>
      </div>
    </blockquote>
    <br>
    see comments above. The document defines 3 DI types and 2 new
    diversity subobjects (IPv4 and IPv6) containing the DI type field.<br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">---<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">"IANA section"<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">You do not define a registry nor a registration
            policy for the "DI Type" </span></p>
      </div>
    </blockquote>
    <br>
    We did the IANA section based on the guidance provided by Lou (TEAS
    co-chair) and I thought what we did was fine as Lou did not provide<br>
    any comment when he reviewed the document. The document describes
    precisely which IANA registries shall be extended to support the<br>
    diversity subobjects and error codes defined in the document. <br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">---<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">§2.1<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">The A-Flags field is 4 bits longs and this
            document already allocates 4 flags, meaning that there is no
            room for extension (although there is a 4 bits Reserved
            field available)</span></p>
      </div>
    </blockquote>
    <br>
    As you mention, there is a reserved field that has 4 bits.<br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">---<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">§2.1<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">If A-Flags "0x01 = Destination node exception"
            and "0x04 = Penultimate node exception" are both set, it
            seems that the penultimate link (between these 2 nodes)
            should also be excluded from the exclusion list. If so this
            should be specified.</span></p>
      </div>
    </blockquote>
    <br>
    There can be multiple links between the Destination node and the
    Penultimate node. If none of these links meets the required
    diversity constraint,<br>
    it is better to reject the LSP setup.<br>
    <br>
    NOTE: the Destination node and the Penultimate node are topological
    exceptions. <br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">---<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">"When the diversity identifier type is set to
            "IPv4/ IPv6<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">              Network Assigned Identifier", the
            value MUST be set to the<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">              IPv4/ IPv6 address of the node
            publishing the Path<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">              Affinity Set (PAS)."<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">Given that the way the PAS is advertised (I
            read 'publish') is out of scope of this document, I'd rather
            not use the term "publishing". I guess "allocating" would be
            better and probably more accurate.</span></p>
      </div>
    </blockquote>
    <br>
    Changed as suggested.<br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">---<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">§3<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">"the diversity subobject must be kept while
            other subobjects may be removed."<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">Do you mean :s/must/MUST  ? (it looks to me
            that this is required for interop, hence a MUST)</span></p>
      </div>
    </blockquote>
    <br>
    Changed as suggested.<br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">---<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">"all Diversity subobjects in an XRO/ EXRS MUST
            contain the same Diversity Identifier Type."<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">Could you clarify the reason?<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">What if someone wants to be diverse with 2
            others LSP: one intra-domain using a client-Initiated
            Identifier, and another one inter-domain using a
            "PCE-allocated Identifier"? </span></p>
      </div>
    </blockquote>
    <br>
    This statement is based on the assumption that only one diversity
    type is used in the core network even if the core network is
    composed of<br>
    multiple core network domains. Shall this assumption be explicitly
    stated?<br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">---<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">§2.3<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">"it MUST return a PathErr with the error code
            TBA3 "Routing Problem" and error value of "Unsupported
            Diversity Identifier Type"<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">I think I would propose<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">"code "Routing Problem" (24) and error value of
            "Unsupported Diversity Identifier Type (TBA3)"</span></p>
      </div>
    </blockquote>
    <br>
    Changed as suggested.<br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">----<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">§2.3<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">"The transit nodes in a domain and the domain
            egress node SHOULD NOT process the signaled diversity
            information."<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">This does not seem to match " In order to<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">      maintain diversity between these two
            connections within the core<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">      network, it is assumed that the core
            network implements Crankback<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">      Signaling [RFC4920]."<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">As I understand, by the latter, that all
            RSVP-TE nodes need to process the diversity information. But
            this may comes from my lack of knowledge of RSVP-TE. </span></p>
      </div>
    </blockquote>
    <br>
    See updates in section 2.3.<br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">---  <o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span
              style="font-size:12.0pt;font-family:&quot;Times New
              Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
              lang="EN-US">Nits:</span></b><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"> <o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">Impressive list of contributors: 1,5 pages, 16
            persons (in additions to 4 authors)</span></p>
      </div>
    </blockquote>
    <br>
    The reason for the long list is that we merged 3 drafts into a
    single draft as requested by the CCAMP chairs when 3 separate drafts
    existed.<br>
    <br>
    <blockquote type="cite"
cite="mid:6300_1495552715_592452CB_6300_19911_1_53C29892C857584299CBF5D05346208A31D25785@OPEXCLILM21.corporate.adroot.infra.ftgroup">
      <div class="WordSection1">
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">Thanks,<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">Regards,<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="font-size:12.0pt;font-family:&quot;Times New
            Roman&quot;,&quot;serif&quot;;mso-fareast-language:FR"
            lang="EN-US">--Bruno<o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
      </div>
      <pre>_________________________________________________________________________________________________________________________

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From nobody Sun Jul  2 05:15:39 2017
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Subject: [RTG-DIR] Rtgdir last call review of draft-ietf-pce-rfc6006bis-02
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Reviewer: Ben Niven-Jenkins
Review result: Has Issues

 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-pce-rfc6006bis-02
Reviewer: Ben Niven-Jenkins
Review Date: 2nd July 2017
Intended Status: Standards Track

Summary: I have some minor concerns about this document that I think should be
resolved before publication.

Comments: The document was generally well written and readable.

Major Issues: No major issues found.

Minor Issues:
1) Section 3.2 SERO & SRRO objects - In Section 6.5 you have them listed with
Object-Type 0: Reserved, whereas in section 3.2 you start at 1. you should be
consistent and list them the same in section 3.2 as you do in 6.5?

Also in Section 6.5 the reference is to [This I-D] whereas in section 3.2 it is
to [RFC6006].

2) Section 3.10 says “When adding new leaves to or removing old leaves from the
existing P2MP tree, by supplying a list of existing leaves, it SHOULD be
possible to optimise the existing P2MP tree.” I don’t see why you have used a
capitalised SHOULD here as you are simply making a statement rather than
placing a requirement on an implementation.

3) Section 5 says “PCEP implementations SHOULD consider the additional security
provided by Transport Layer Security (TLS) [I-D.ietf-pce-pceps].”

Use of SHOULD says to me you expect the majority of implementations to
implement I-D.ietf-pce-pceps. So should the reference to I-D.ietf-pce-pceps be
normative?

4) Section 6.5 - PCEP Objects. Should you specify the meaning of Object-Types
0, 1 & 2 for the END-POINTS object, like you do for the other objects in this
section?

Nits:
Section 3.9 says
“The only difference is that the user MUST insert the list of RROs and SRROs
after each type of END-POINTS in the PCReq message”

and Section 3.10 also says

“To add new leaves, the user MUST build a P2MP request using END-POINTS with
leaf type 1.”

“To remove old leaves, the user must build a P2MP request using END-POINTS with
leaf type 2.

“For old leaves, the user MUST provide the old path as a list of RROs that
immediately follows each END-POINTS object.”

You haven’t used or defined the term “user” up until now. By user do you really
mean PCC? If not I think you should explain what/who this user is.



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From: Dhruv Dhody <dhruv.ietf@gmail.com>
To: Ben Niven-Jenkins <ben@niven-jenkins.co.uk>, rtg-dir@ietf.org
Cc: draft-ietf-pce-rfc6006bis.all@ietf.org, pce@ietf.org, rtg-ads@ietf.org, "dhruv.dhody@huawei.com" <dhruv.dhody@huawei.com>
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Subject: Re: [RTG-DIR] Rtgdir last call review of draft-ietf-pce-rfc6006bis-02
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Hi Ben,

Thanks for your review. Please see inline.

On Sunday 02 July 2017 05:45 PM, Ben Niven-Jenkins wrote:
> Reviewer: Ben Niven-Jenkins
> Review result: Has Issues
>
>   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-pce-rfc6006bis-02
> Reviewer: Ben Niven-Jenkins
> Review Date: 2nd July 2017
> Intended Status: Standards Track
>
> Summary: I have some minor concerns about this document that I think should be
> resolved before publication.
>
> Comments: The document was generally well written and readable.
>
> Major Issues: No major issues found.
>
> Minor Issues:
> 1) Section 3.2 SERO & SRRO objects - In Section 6.5 you have them listed with
> Object-Type 0: Reserved, whereas in section 3.2 you start at 1. you should be
> consistent and list them the same in section 3.2 as you do in 6.5?
>
> Also in Section 6.5 the reference is to [This I-D] whereas in section 3.2 it is
> to [RFC6006].
[Dhruv]: Updated.
> 2) Section 3.10 says “When adding new leaves to or removing old leaves from the
> existing P2MP tree, by supplying a list of existing leaves, it SHOULD be
> possible to optimise the existing P2MP tree.” I don’t see why you have used a
> capitalised SHOULD here as you are simply making a statement rather than
> placing a requirement on an implementation.
[Dhruv]: Ok. Updated.
> 3) Section 5 says “PCEP implementations SHOULD consider the additional security
> provided by Transport Layer Security (TLS) [I-D.ietf-pce-pceps].”
>
> Use of SHOULD says to me you expect the majority of implementations to
> implement I-D.ietf-pce-pceps. So should the reference to I-D.ietf-pce-pceps be
> normative?

[Dhruv]:Hmm, you may be right.
It just that other documents have put this down as Informative usually. 
PCEPS is also in publication process, so normative reference will most 
likely not block progress. I am not sure if we should deviate in this 
document. Thoughts?

> 4) Section 6.5 - PCEP Objects. Should you specify the meaning of Object-Types
> 0, 1 & 2 for the END-POINTS object, like you do for the other objects in this
> section?

[Dhruv]: END-POINTS is an existing object defined in RFC5440. This 
document defines new object-types for the END-POINTS object. Thus I 
don't think there is a reason to mention 0,1 & 2.
> Nits:
> Section 3.9 says
> “The only difference is that the user MUST insert the list of RROs and SRROs
> after each type of END-POINTS in the PCReq message”
>
> and Section 3.10 also says
>
> “To add new leaves, the user MUST build a P2MP request using END-POINTS with
> leaf type 1.”
>
> “To remove old leaves, the user must build a P2MP request using END-POINTS with
> leaf type 2.
>
> “For old leaves, the user MUST provide the old path as a list of RROs that
> immediately follows each END-POINTS object.”
>
> You haven’t used or defined the term “user” up until now. By user do you really
> mean PCC? If not I think you should explain what/who this user is.
[Dhruv]: Updated to PCC.

The working copy and diff are attached.

Thanks for your review.

Regards,
Dhruv

>


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--------------4C64B9632F75A51EC27E732A--


From nobody Sun Jul  2 10:20:38 2017
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Subject: Re: [RTG-DIR] Rtgdir last call review of draft-ietf-pce-rfc6006bis-02
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--Apple-Mail=_9619BE4F-C095-4565-9B85-02689330DE39
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Hi Dhruv,

> On 2 Jul 2017, at 17:08, Dhruv Dhody <dhruv.ietf@gmail.com> wrote:
>=20
> Hi Ben,
>=20
> Thanks for your review. Please see inline.
>=20
> On Sunday 02 July 2017 05:45 PM, Ben Niven-Jenkins wrote:
>> 3) Section 5 says =E2=80=9CPCEP implementations SHOULD consider the =
additional security
>> provided by Transport Layer Security (TLS) [I-D.ietf-pce-pceps].=E2=80=9D=

>>=20
>> Use of SHOULD says to me you expect the majority of implementations =
to
>> implement I-D.ietf-pce-pceps. So should the reference to =
I-D.ietf-pce-pceps be
>> normative?
>=20
> [Dhruv]:Hmm, you may be right.
> It just that other documents have put this down as Informative =
usually. PCEPS is also in publication process, so normative reference =
will most likely not block progress. I am not sure if we should deviate =
in this document. Thoughts?

I don=E2=80=99t have a strong opinion, I point it out as something that =
struck me as a possible oversight. If the authors & ADs are happy for it =
to be an informative reference, that=E2=80=99s fine with me.

>> 4) Section 6.5 - PCEP Objects. Should you specify the meaning of =
Object-Types
>> 0, 1 & 2 for the END-POINTS object, like you do for the other objects =
in this
>> section?
>=20
> [Dhruv]: END-POINTS is an existing object defined in RFC5440. This =
document defines new object-types for the END-POINTS object. Thus I =
don't think there is a reason to mention 0,1 & 2.

Fair enough.

Ben


--Apple-Mail=_9619BE4F-C095-4565-9B85-02689330DE39
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">Hi Dhruv,<div class=3D""><br class=3D""><div><blockquote =
type=3D"cite" class=3D""><div class=3D"">On 2 Jul 2017, at 17:08, Dhruv =
Dhody &lt;<a href=3D"mailto:dhruv.ietf@gmail.com" =
class=3D"">dhruv.ietf@gmail.com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><span =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px; float: none; display: inline =
!important;" class=3D"">Hi Ben,</span><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; float: none; display: inline =
!important;" class=3D"">Thanks for your review. Please see =
inline.</span><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: =
none; display: inline !important;" class=3D"">On Sunday 02 July 2017 =
05:45 PM, Ben Niven-Jenkins wrote:</span><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><blockquote type=3D"cite" =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D"">3) Section 5 says =
=E2=80=9CPCEP implementations SHOULD consider the additional =
security</blockquote><blockquote type=3D"cite" style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D"">provided by Transport Layer =
Security (TLS) [I-D.ietf-pce-pceps].=E2=80=9D<br class=3D""><br =
class=3D"">Use of SHOULD says to me you expect the majority of =
implementations to<br class=3D"">implement I-D.ietf-pce-pceps. So should =
the reference to I-D.ietf-pce-pceps be<br class=3D"">normative?<br =
class=3D""></blockquote><br style=3D"font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: =
none; display: inline !important;" class=3D"">[Dhruv]:Hmm, you may be =
right.</span><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: =
none; display: inline !important;" class=3D"">It just that other =
documents have put this down as Informative usually. PCEPS is also in =
publication process, so normative reference will most likely not block =
progress. I am not sure if we should deviate in this document. =
Thoughts?</span><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""></div></blockquote><div><br class=3D""></div>I don=E2=80=99t =
have a strong opinion, I point it out as something that struck me as a =
possible oversight. If the authors &amp; ADs are happy for it to be an =
informative reference, that=E2=80=99s fine with me.</div><div><br =
class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D""><blockquote type=3D"cite" style=3D"font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D"">4) Section 6.5 - PCEP Objects. Should you specify the =
meaning of Object-Types<br class=3D"">0, 1 &amp; 2 for the END-POINTS =
object, like you do for the other objects in this<br =
class=3D"">section?<br class=3D""></blockquote><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; float: none; display: inline =
!important;" class=3D"">[Dhruv]: END-POINTS is an existing object =
defined in RFC5440. This document defines new object-types for the =
END-POINTS object. Thus I don't think there is a reason to mention 0,1 =
&amp; 2.</span><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""></div></blockquote><div><br class=3D""></div>Fair =
enough.</div><div><br class=3D""></div></div><div>Ben</div><div><br =
class=3D""></div></body></html>=

--Apple-Mail=_9619BE4F-C095-4565-9B85-02689330DE39--


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Date: Sun, 2 Jul 2017 18:20:23 +0100
Cc: rtg-dir@ietf.org, draft-ietf-pce-rfc6006bis.all@ietf.org, pce@ietf.org, rtg-ads@ietf.org, "dhruv.dhody@huawei.com" <dhruv.dhody@huawei.com>
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Subject: Re: [RTG-DIR] Rtgdir last call review of draft-ietf-pce-rfc6006bis-02
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--Apple-Mail=_9619BE4F-C095-4565-9B85-02689330DE39
Content-Transfer-Encoding: quoted-printable
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	charset=utf-8

Hi Dhruv,

> On 2 Jul 2017, at 17:08, Dhruv Dhody <dhruv.ietf@gmail.com> wrote:
>=20
> Hi Ben,
>=20
> Thanks for your review. Please see inline.
>=20
> On Sunday 02 July 2017 05:45 PM, Ben Niven-Jenkins wrote:
>> 3) Section 5 says =E2=80=9CPCEP implementations SHOULD consider the =
additional security
>> provided by Transport Layer Security (TLS) [I-D.ietf-pce-pceps].=E2=80=9D=

>>=20
>> Use of SHOULD says to me you expect the majority of implementations =
to
>> implement I-D.ietf-pce-pceps. So should the reference to =
I-D.ietf-pce-pceps be
>> normative?
>=20
> [Dhruv]:Hmm, you may be right.
> It just that other documents have put this down as Informative =
usually. PCEPS is also in publication process, so normative reference =
will most likely not block progress. I am not sure if we should deviate =
in this document. Thoughts?

I don=E2=80=99t have a strong opinion, I point it out as something that =
struck me as a possible oversight. If the authors & ADs are happy for it =
to be an informative reference, that=E2=80=99s fine with me.

>> 4) Section 6.5 - PCEP Objects. Should you specify the meaning of =
Object-Types
>> 0, 1 & 2 for the END-POINTS object, like you do for the other objects =
in this
>> section?
>=20
> [Dhruv]: END-POINTS is an existing object defined in RFC5440. This =
document defines new object-types for the END-POINTS object. Thus I =
don't think there is a reason to mention 0,1 & 2.

Fair enough.

Ben


--Apple-Mail=_9619BE4F-C095-4565-9B85-02689330DE39
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	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">Hi Dhruv,<div class=3D""><br class=3D""><div><blockquote =
type=3D"cite" class=3D""><div class=3D"">On 2 Jul 2017, at 17:08, Dhruv =
Dhody &lt;<a href=3D"mailto:dhruv.ietf@gmail.com" =
class=3D"">dhruv.ietf@gmail.com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><span =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px; float: none; display: inline =
!important;" class=3D"">Hi Ben,</span><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; float: none; display: inline =
!important;" class=3D"">Thanks for your review. Please see =
inline.</span><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: =
none; display: inline !important;" class=3D"">On Sunday 02 July 2017 =
05:45 PM, Ben Niven-Jenkins wrote:</span><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><blockquote type=3D"cite" =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant: normal; font-weight: normal; letter-spacing: normal; =
line-height: normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px;" class=3D"">3) Section 5 says =
=E2=80=9CPCEP implementations SHOULD consider the additional =
security</blockquote><blockquote type=3D"cite" style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D"">provided by Transport Layer =
Security (TLS) [I-D.ietf-pce-pceps].=E2=80=9D<br class=3D""><br =
class=3D"">Use of SHOULD says to me you expect the majority of =
implementations to<br class=3D"">implement I-D.ietf-pce-pceps. So should =
the reference to I-D.ietf-pce-pceps be<br class=3D"">normative?<br =
class=3D""></blockquote><br style=3D"font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: =
none; display: inline !important;" class=3D"">[Dhruv]:Hmm, you may be =
right.</span><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: =
none; display: inline !important;" class=3D"">It just that other =
documents have put this down as Informative usually. PCEPS is also in =
publication process, so normative reference will most likely not block =
progress. I am not sure if we should deviate in this document. =
Thoughts?</span><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""></div></blockquote><div><br class=3D""></div>I don=E2=80=99t =
have a strong opinion, I point it out as something that struck me as a =
possible oversight. If the authors &amp; ADs are happy for it to be an =
informative reference, that=E2=80=99s fine with me.</div><div><br =
class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D""><blockquote type=3D"cite" style=3D"font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D"">4) Section 6.5 - PCEP Objects. Should you specify the =
meaning of Object-Types<br class=3D"">0, 1 &amp; 2 for the END-POINTS =
object, like you do for the other objects in this<br =
class=3D"">section?<br class=3D""></blockquote><br style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; float: none; display: inline =
!important;" class=3D"">[Dhruv]: END-POINTS is an existing object =
defined in RFC5440. This document defines new object-types for the =
END-POINTS object. Thus I don't think there is a reason to mention 0,1 =
&amp; 2.</span><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""></div></blockquote><div><br class=3D""></div>Fair =
enough.</div><div><br class=3D""></div></div><div>Ben</div><div><br =
class=3D""></div></body></html>=

--Apple-Mail=_9619BE4F-C095-4565-9B85-02689330DE39--


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From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
To: "Joel M. Halpern" <jmh@joelhalpern.com>
CC: "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "draft-ietf-spring-oam-usecase.all@ietf.org" <draft-ietf-spring-oam-usecase.all@ietf.org>
Thread-Topic: Rtgdir last call review of draft-ietf-spring-oam-usecase-06
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Subject: Re: [RTG-DIR] Rtgdir last call review of draft-ietf-spring-oam-usecase-06
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/1v1v3IzSivhvC5keFQx2NDMesOI>
Subject: [RTG-DIR] Guidance and templates for RtgDir reviews
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Dear directorate members,

I've revamped the wiki pages that give guidance for writing directorate rev=
iews, to reflect the fact that we now do reviews for multiple reasons, not =
just at IETF last call.  In particular, I've added a new page giving a temp=
late to use for an Early / QA review, and an example of such a review.

https://trac.ietf.org/trac/rtg/wiki/RtgDirGuidance

Please let me know if you have any questions or comments.

Best regards
Jon



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<p class=3D"MsoNormal">Dear directorate members,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I&#8217;ve revamped the wiki pages that give guidanc=
e for writing directorate reviews, to reflect the fact that we now do revie=
ws for multiple reasons, not just at IETF last call.&nbsp; In particular, I=
&#8217;ve added a new page giving a template to use
 for an Early / QA review, and an example of such a review.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://trac.ietf.org/trac/rtg/wiki/RtgDi=
rGuidance">https://trac.ietf.org/trac/rtg/wiki/RtgDirGuidance</a><o:p></o:p=
></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Please let me know if you have any questions or comm=
ents.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Best regards<o:p></o:p></p>
<p class=3D"MsoNormal">Jon<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</body>
</html>

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References: <a60975bbd3774d4cb4041ef0d005f642@XCH-ALN-001.cisco.com> <CAEFuwkgtYbvHQdRUJb3jmFgq3+dtfJ+ERdpgB8aeKXryVBYYTA@mail.gmail.com>
From: Pushpasis Sarkar <pushpasis.ietf@gmail.com>
Date: Tue, 4 Jul 2017 20:57:48 -0700
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To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
Cc: "idr-ads@ietf.org" <idr-ads@ietf.org>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>,  "draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.org" <draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.org>,  "idr@ietf. org" <idr@ietf.org>
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Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-bgp-ls-node-admin-tag-extension-01
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Hi Les,

Thank you once more for the review comments. And sorry for the late reply.
I have addressed all your comments in the attached draft. Please review the
same let me know if you have any more comments. If not I will upload the
draft soon.

Thanks and regards,
-Pushpasis

On Wed, Jun 28, 2017 at 10:26 PM, Pushpasis Sarkar <pushpasis.ietf@gmail.com
> wrote:

> Hi Les,
>
> Thanks a lot for the review comments. I will reply back addressing your
> comments soon.
>
> Thanks and regards
> -Pushpasis
>
> On Tue, Jun 27, 2017 at 11:37 PM, Les Ginsberg (ginsberg) <
> ginsberg@cisco.com> wrote:
>
>> 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
>> comments that you receive, and strive to resolve them through discussion or
>> by updating the draft.
>>
>>
>> Document: draft-ietf-idr-bgp-ls-node-admin-tag-extension-01
>> Reviewer: Les Ginsberg
>> Review Date: June 27, 2017
>> Intended Status: Standards
>>
>> Summary:  The document is of modest scope - covering definition of BGP-LS
>> codepoints for a relatively new IGP attribute (Node Admin Tags).
>> While I found nothing which I would consider a major issue, there are a
>> number
>> of places where the text lacks clarity. I think addressing these areas
>> would
>> greatly improve the quality of the draft.
>>
>>
>> Major Issues: None
>>
>> Minor Issues:
>>
>> Section 1 Introduction
>>
>> The acronym LSDB is not defined.
>>
>> Figure 1
>>
>> I have a personal dislike for duplicating text/pictures from another
>> spec when that spec could simply be referenced. There are only two
>> possible outcomes:
>>
>> 1)The duplicated text is redundant (best case)
>> 2)The text differs somewhat from the original leading to possible
>> unintentional misinterpretations.
>>
>> Suit yourself on this comment - but I would prefer the duplication be
>> omitted.
>>
>> Section 2 First paragraph
>>
>> You refer to "sub-TLV" but that reference is unclear and ambiguous.
>> IS-IS uses a sub-TLV of Router Capability to advertise tags, but OSPF
>> uses a TLV of Router Info LSA.
>> What seems most relevant here is that you are defining a new Attribute
>> TLV for Node NLRI.
>>
>> Section 3 Second paragraph
>>
>> I do not know what the paragraph is trying to say, nor do
>> I know what the "TBD" in columns 4 and 5 in the following Table 1 is
>> meant to reference. If you are simply trying to describe the source
>> of the info advertised by the new BGP-LS Node attribute then you should
>> rewrite the above paragraph and in the figure below show:
>>
>> IS-IS 242/21
>> OSPF RI-LSA/10
>>
>> Section 3.1
>>
>> A description of where in the Node NLRI the area/level information can be
>> found
>> (from RFC 7752) would be helpful.
>>
>>
>> Section 3.1 Penultimate Paragraph
>>
>> As TAGs with "global" scope will be advertised by the IGP multiple
>> times (once per area/level) I assume you are asking BGP-LS advertisements
>> to reduce these multiple occurrences to a single occurrence? More
>> explicit language on that point would be helpful.
>>
>> Section 3.1 Last paragraph
>>
>> I recognize this statement regarding policy being used to filter what is
>> advertised is consistent with RFC 7752. But it would also be good to
>> include
>> a statement like:
>>
>> "Definition of such a policy is outside the scope of this document."
>>
>> Nits: Please see attached diff file with some editorial corrections.
>>
>
>

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<div dir=3D"ltr">Hi Les,<div><br></div><div>Thank you once more for the rev=
iew comments. And sorry for the late reply. I have addressed all your comme=
nts in the attached draft. Please review the same let me know if you have a=
ny more comments. If not I will upload the draft soon.</div><div><br></div>=
<div>Thanks and regards,</div><div>-Pushpasis</div></div><div class=3D"gmai=
l_extra"><br><div class=3D"gmail_quote">On Wed, Jun 28, 2017 at 10:26 PM, P=
ushpasis Sarkar <span dir=3D"ltr">&lt;<a href=3D"mailto:pushpasis.ietf@gmai=
l.com" target=3D"_blank">pushpasis.ietf@gmail.com</a>&gt;</span> wrote:<br>=
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div dir=3D"ltr">Hi Les,<div><br></div><div>=
Thanks a lot for the review comments. I will reply back addressing your com=
ments soon.</div><div><br></div><div>Thanks and regards</div><span class=3D=
"HOEnZb"><font color=3D"#888888"><div>-Pushpasis</div></font></span></div><=
div class=3D"HOEnZb"><div class=3D"h5"><div class=3D"gmail_extra"><br><div =
class=3D"gmail_quote">On Tue, Jun 27, 2017 at 11:37 PM, Les Ginsberg (ginsb=
erg) <span dir=3D"ltr">&lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"=
_blank">ginsberg@cisco.com</a>&gt;</span> wrote:<br><blockquote class=3D"gm=
ail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-le=
ft:1ex">Hello,<br>
<br>
=C2=A0I have been selected as the Routing Directorate reviewer for this dra=
ft. The Routing Directorate seeks to review all routing or routing-related =
drafts as they pass through IETF last call and IESG review, and sometimes o=
n special request. The purpose of the review is to provide assistance to th=
e Routing ADs. For more information about the Routing Directorate, please s=
ee=C2=A0 <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/are<wbr>a/rt=
g/trac/wiki/RtgDir</a> .<br>
<br>
Although these comments are primarily for the use of the Routing ADs, it wo=
uld be helpful if you could consider them along with any other IETF comment=
s that you receive, and strive to resolve them through discussion or by upd=
ating the draft.<br>
<br>
<br>
Document: draft-ietf-idr-bgp-ls-node-adm<wbr>in-tag-extension-01<br>
Reviewer: Les Ginsberg<br>
Review Date: June 27, 2017<br>
Intended Status: Standards<br>
<br>
Summary:=C2=A0 The document is of modest scope - covering definition of BGP=
-LS<br>
codepoints for a relatively new IGP attribute (Node Admin Tags).<br>
While I found nothing which I would consider a major issue, there are a num=
ber<br>
of places where the text lacks clarity. I think addressing these areas woul=
d<br>
greatly improve the quality of the draft.<br>
<br>
<br>
Major Issues: None<br>
<br>
Minor Issues:<br>
<br>
Section 1 Introduction<br>
<br>
The acronym LSDB is not defined.<br>
<br>
Figure 1<br>
<br>
I have a personal dislike for duplicating text/pictures from another<br>
spec when that spec could simply be referenced. There are only two<br>
possible outcomes:<br>
<br>
1)The duplicated text is redundant (best case)<br>
2)The text differs somewhat from the original leading to possible<br>
unintentional misinterpretations.<br>
<br>
Suit yourself on this comment - but I would prefer the duplication be omitt=
ed.<br>
<br>
Section 2 First paragraph<br>
<br>
You refer to &quot;sub-TLV&quot; but that reference is unclear and ambiguou=
s.<br>
IS-IS uses a sub-TLV of Router Capability to advertise tags, but OSPF<br>
uses a TLV of Router Info LSA.<br>
What seems most relevant here is that you are defining a new Attribute<br>
TLV for Node NLRI.<br>
<br>
Section 3 Second paragraph<br>
<br>
I do not know what the paragraph is trying to say, nor do<br>
I know what the &quot;TBD&quot; in columns 4 and 5 in the following Table 1=
 is<br>
meant to reference. If you are simply trying to describe the source<br>
of the info advertised by the new BGP-LS Node attribute then you should<br>
rewrite the above paragraph and in the figure below show:<br>
<br>
IS-IS 242/21<br>
OSPF RI-LSA/10<br>
<br>
Section 3.1<br>
<br>
A description of where in the Node NLRI the area/level information can be f=
ound<br>
(from RFC 7752) would be helpful.<br>
<br>
<br>
Section 3.1 Penultimate Paragraph<br>
<br>
As TAGs with &quot;global&quot; scope will be advertised by the IGP multipl=
e<br>
times (once per area/level) I assume you are asking BGP-LS advertisements<b=
r>
to reduce these multiple occurrences to a single occurrence? More<br>
explicit language on that point would be helpful.<br>
<br>
Section 3.1 Last paragraph<br>
<br>
I recognize this statement regarding policy being used to filter what is<br=
>
advertised is consistent with RFC 7752. But it would also be good to includ=
e<br>
a statement like:<br>
<br>
&quot;Definition of such a policy is outside the scope of this document.&qu=
ot;<br>
<br>
Nits: Please see attached diff file with some editorial corrections.<br>
</blockquote></div><br></div>
</div></div></blockquote></div><br></div>

--f403045eb0d0df222705538a0041--

--f403045eb0d0df222d05538a0043
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From: <bruno.decraene@orange.com>
To: Dieter Beller <Dieter.Beller@nokia.com>, "draft-ietf-teas-lsp-diversity@ietf.org" <draft-ietf-teas-lsp-diversity@ietf.org>
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Thread-Topic: [RTG-DIR] Rtgdir Last Call Review of draft-ietf-teas-lsp-diversity-07
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From nobody Sat Jul  8 01:15:39 2017
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From: Christian Hopps <chopps@chopps.org>
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Subject: [RTG-DIR] Rtgdir early review of draft-ietf-i2rs-yang-l3-topology-10
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Reviewer: Christian Hopps
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-i2rs-yang-l3-topology/

The purpose of this review is to determine it's compatibility with the new
revised datastore model guidelines.

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

Document: draft-ietf-i2rs-yang-l3-topology-10.txt
Reviewer: Christian Hopps
Review Date: July 8, 2017
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:

- This document adapts the suggested NMDA guidelines quite nicely.

- Perhaps an informative reference to the NMDA guidelines draft would be useful.

- Appendix A: Second Paragraph, last sentence:
  - I believe that it should say:

      "instead of ietf-network and ietf-network-topology"

    it currently says:

      "instead of ietf-network and ietf-network-state"

- IS-IS example model (sorry couldn't help myself :)

  - The example IS-IS l3-node-attributes augmentation isis-node-attributes
    includes an "iso-pseudonode-id". This isn't a node attribute, but rather a
    link one (it is repeated later under link attributes).

  - The isis-wg suggests to use "IS-IS" consistently, where possible, in
    documents rather than "isis" or "ISIS".



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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Routing ADs <rtg-ads@tools.ietf.org>
CC: Routing Directorate <rtg-dir@ietf.org>, "draft-ietf-teas-network-assigned-upstream-label@ietf.org" <draft-ietf-teas-network-assigned-upstream-label@ietf.org>, "teas@ietf.org" <teas@ietf.org>
Thread-Topic: RtgDir review: draft-ietf-teas-network-assigned-upstream-label-06
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Date: Sat, 8 Jul 2017 17:29:59 +0000
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Subject: [RTG-DIR] RtgDir review: draft-ietf-teas-network-assigned-upstream-label-06
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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: Pushpasis Sarkar <pushpasis.ietf@gmail.com>
CC: "idr-ads@ietf.org" <idr-ads@ietf.org>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.org" <draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.org>, "idr@ietf. org" <idr@ietf.org>
Thread-Topic: RtgDir review: draft-ietf-idr-bgp-ls-node-admin-tag-extension-01
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Date: Sat, 8 Jul 2017 20:42:51 +0000
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Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-bgp-ls-node-admin-tag-extension-01
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--_000_ed8ccfc11e8a4951a2bf67d8ad34e16bXCHALN001ciscocom_--


From nobody Mon Jul 10 07:50:41 2017
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From: Thomas Morin <thomas.morin@orange.com>
Organization: Orange
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CC: "rtg-dir@ietf.org" <rtg-dir@ietf.org>, <draft-ietf-teas-pce-central-control.all@ietf.org>, <teas@ietf.org>
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Subject: [RTG-DIR] RtgDir review: draft-ietf-teas-pce-central-control-03
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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 
​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-pce-central-control-03
Reviewer: Thomas Morin
Review Date: 2017-07-10
IETF LC End Date: ?
Intended Status: Informational

Summary:

     No issues found. This document is ready for publication.

Comments:

     Saying that the draft is well written would be an understatement: 
it reads like a fairy tale.  And a nicely illustrated one.

     Beyond the (barely) private joke, despite the document being 
overall fairly honest in detailing the conditions under which the PCE 
architecture and PCEP could be generically applicable to central 
control, I'm under the impression that the document could exercise a bit 
more criticism on this idea in some places. In particular, section 3.2.3 
on service delivery and the start of section 4, may lead the reader into 
believing that it it may actually be easy to adapt PCEP for this use 
case ("only realtively minor changes"), even though the document does 
not provide rationale to support that this would be easier than, for 
instance, completing the Netconf/YANG framework for the same purpose. 
That is to say, the document would be more interesting in this area, if 
it was discussing whether or not actually choosing to extend PCEP for 
this purpose is a direction to favor in particular.

Nits:

     First paragraph of section 2.1.1 ends with 'control "domains." ' 
where I would have expected 'control "domains".', but this is possibly 
just me being not aware of a typography rule.


From nobody Mon Jul 10 11:17:15 2017
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From: Alexander Clemm <alexander.clemm@huawei.com>
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From: "BRUNGARD, DEBORAH A" <db3546@att.com>
To: Thomas Morin <thomas.morin@orange.com>
CC: "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "draft-ietf-teas-pce-central-control@ietf.org" <draft-ietf-teas-pce-central-control@ietf.org>
Thread-Topic: RtgDir review: draft-ietf-teas-pce-central-control-03
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Date: Mon, 10 Jul 2017 21:01:56 +0000
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Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-teas-pce-central-control-03
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From: "BRUNGARD, DEBORAH A" <db3546@att.com>
To: Ben Niven-Jenkins <ben@niven-jenkins.co.uk>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>
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From nobody Tue Jul 11 07:00:06 2017
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From: Carlos Pignataro <cpignata@cisco.com>
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Subject: [RTG-DIR] Rtgdir early review of draft-ietf-mpls-bfd-directed-07
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Reviewer: Carlos Pignataro
Review result: Has Issues

Hello

I have been selected to do a routing directorate “early” review of this draft.
https://datatracker.ietf.org/doc/draft-ietf-mpls-bfd-directed/

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.

The MPLS chairs have requested an early review from the directorate with the
objective of improving document quality.  This document has had three
unsuccessful WG LCs.

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

Document: draft-ietf-mpls-bfd-directed-07.txt
Reviewer: Carlos Pignataro
Review Date: Early July, 2017
Intended Status: Standards Track

Summary:
I have significant concerns about this document.
I also recommend a BFD WG Chair or appointee to review this document.

Comments:

First, I have a general concern about the architectural approach in this
document.

This document is modeled after RFC 7110. RFC 7110 describes the specification
of a return path for MPLS LSP Ping. MPLS LSP Ping uses a request/reply
command/response paradigm, in which receipt of an Echo Request elicits the
generation of an Echo Reply.

BFD for MPLS, however, uses a different approach and paradigm (as per RFC
5884). An MPLS LSP Ping packet is used as a bootstrap, signaling discriminator
value for a persistent BFD session. After the MPLS LSP Ping signals the
Discriminator (via MPLS LSP Ping TLV) to use, then BFD control messages are
sent back and forth.

However, while the BFD session is UP and  BFD control messages and being sent
back and forth, and while no MPLS LSP Ping packets are sent after bootstrapping
-- what happens if the return path changes (e.g., the return LSP goes down,
gets unconfigured, etc.)?

In that case, not only this mechanism can actually make things worst, because
it results in a false negative, but also the document does not specify how the
system should recover. The I-D seems to assume complete topological
invariability for it to work long-term, since it does not specify any mechanism
to update or to deal with such a failure or change scenario.

On the other hand, there is already a BFD mechanism without the bootstrapping
setup and with a command/response like behavior, that is S-BFD, RFC 7881. That
one is notably missing from this draft.

Further, there seem to be a number of potentially erroneous assumptions made,
see below.

Additional Comments:

     Bidirectional Forwarding Detection (BFD) Directed Return Path

The title should include that this is *only* for MPLS BFD.

   When a BFD session monitors an explicitly routed unidirectional path
   there may be a need to direct egress BFD peer to use a specific path
   for the reverse direction of the BFD session.

Scope: is this solution targeted only for "explicitly routed unidirectional
path", and the solution to have the reply come back the exact reverse
direction? That does not seem to be the case and the solution.

   [RFC5880], [RFC5881], and [RFC5883] established the BFD protocol for
   IP networks.  [RFC5884] and [RFC7726] set rules of using BFD
   asynchronous mode over IP/MPLS LSPs.  These standards implicitly
   assume that the egress BFD peer will use the shortest path route
   regardless of route being used to send BFD control packets towards
   it.

Is "These standards" referring to the three former or the four latter?

   For the case where a LSP is explicitly routed it is likely that the
   shortest return path to the ingress BFD peer would not follow the
   same path as the LSP in the forward direction.  The fact that BFD
   control packets are not guaranteed to follow the same links and nodes
   in both forward and reverse directions is a significant factor in
   producing false positive defect notifications, i.e. false alarms, if
   used by the ingress BFD peer to deduce the state of the forward
   direction.

There may be an implicit mis-assumption in this text and overall approach: the
fact that traffic flows on one direction does not imply that the reverse
direction using the same interfaces and nodes would actually be consequently
properly programmed and working.

   This document defines the BFD Reverse Path TLV as an extension to LSP
   Ping [RFC8029] and proposes that it is to be used to instruct the
   egress BFD peer to use an explicit path for its BFD control packets
   associated with a particular BFD session.

This text assumes that the BFD return path is MPLS. However, my understanding
from RFC 5884 is that this is not necessarily the case, and the return can be
IP.

   When BFD is used to monitor unidirectional explicitly routed path,
   e.g.  MPLS-TE LSP, BFD control packets in forward direction would be
   in-band using the mechanism defined in [RFC5884] and [RFC5586].

Which BFD uses RFC 5586? RFC5586 says that is not needed:

   "Some of these functions can be supported using existing
   tools such as Virtual Circuit Connectivity Verification (VCCV)
   [RFC5085], Bidirectional Forwarding Detection for MPLS LSPs (BFD-
   MPLS) [BFD-MPLS], LSP-Ping [RFC4379], or BFD-VCCV [BFD-VCCV]."

And then:

   o  a failure detection by ingress node on the reverse path cannot be
      interpreted as bi-directional failure unambiguously and thus
      trigger, for example, protection switchover of the forward
      direction without possibility of being a false positive.

   To address this scenario the egress BFD peer would be instructed to
   use a specific path for BFD control packets.

But using a specific path for return cannot either imply "interpreted as
bi-directional failure unambiguously", so the scenario is not *addressed*.

   The BFD Reverse Path TLV carries information about the path onto
   which the egress BFD peer of the BFD session referenced by the BFD
   Discriminator TLV MUST transmit BFD control packets.  The format of
   the BFD Reverse Path TLV is as presented in Figure 1.

What does the remote endpoint do with that "MUST" if the return FEC goes away?

There also seem to be some self-contradiction. This document says:

   LSP ping, defined in [RFC8029], uses BFD Discriminator TLV [RFC5884]
   to bootstrap a BFD session over an MPLS LSP.  This document defines a
   new TLV, BFD Reverse Path TLV, that MUST contain a single sub-TLV
   that can be used to carry information about the reverse path for the
   BFD session that is specified by value in BFD Discriminator TLV.

And then says:

   Reverse Path field contains a sub-TLV.

But then says:

   None, one or more sub-TLVs MAY be included in the BFD Reverse
   Path TLV.  If none sub-TLVs found in the BFD Reverse Path TLV, the
   egress BFD peer MUST revert to using the default, i.e., over IP
   network, reverse path.

So is it only one, or none/one/multiple?

I believe it needs to be multiple since then a Tunnel can be specified. But the
document as-is seems self-contradicting.

Further, where has that "default" been defined as "over IP network"?

There's another contradiction here:

   If the egress LSR cannot find the path specified in the Reverse Path
   TLV it MUST send Echo Reply with the received Reverse Path TLV and
   set the Return Code to "Failed to establish the BFD session.  The
   specified reverse path was not found" Section 3.3.  The egress BFD
   peer MAY establish the BFD session over IP network as defined in
   [RFC5884].

So the response is "Failed to establish the BFD session." But then it MAY
establish the session? And, again, what if the path is found at bootstrap but
lost afterwards?

4.  Use Case Scenario

The fact that A-B-C-D-G-H works does not mean that the reverse, H-G-D-C-B-A,
will work.

6.  Security Considerations

   Security considerations discussed in [RFC5880], [RFC5884], [RFC7726],
   and [RFC8029], apply to this document.

There seem to be additional security considerations with returns taking
explicit paths, and should be expanded in here.

Net-net, I do have concerns about this document. I believe it is not ready to
advance, and could use more whiteboard time as well as a review by BFD experts.

Best,

Carlos Pignataro.


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From: Alia Atlas <akatlas@juniper.net>
To: "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "BRUNGARD, DEBORAH A" <db3546@att.com>, "Alvaro Retana (aretana)" <aretana@cisco.com>, "rtg-chairs@ietf.org" <rtg-chairs@ietf.org>, Amy Yemin <amy.yemin@huawei.com>
CC: Jonathan Hardwick <Jonathan.Hardwick@metaswitch.com>
Thread-Topic: Routing Directorate get together: Monday July 17 from 6:45 - 7:30pm (UTC+1) Prague time in Karlin III
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/5Px0l6duGXsXKAatESMlkFKF7UQ>
Subject: [RTG-DIR] Routing Directorate get together: Monday July 17 from 6:45 - 7:30pm (UTC+1) Prague time in Karlin III
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We have decided to combine the usual Tues RTG WG Chairs & Secretaries lunch=
 meeting with the
Routing Directorate meeting.  The meeting will be on Monday July 17 from 6:=
45 to 7:35pm.

I hope you all can make it and this resolves the conflicts with Tuesday lun=
ch.

Hi,

As Deborah mentioned in her email of June 8, Alvaro, Deborah and I thought =
it would be useful to get together
with the Routing Directorate for an informal discussion. Please do RSVP.

If there is interest (please unicast), a set of us will head out to dinner =
as well.
If you have specific topics that you think would be good to cover, please l=
et us know.

The meeting time is Monday July 17, 6:45 - 7:30pm Prague time, in Karlin II=
I.

Regards,
Alia



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<font face=3D"Calibri" size=3D"2"><span style=3D"font-size:11pt;">
<div>We have decided to combine the usual Tues RTG WG Chairs &amp; Secretar=
ies lunch meeting with the</div>
<div>Routing Directorate meeting.&nbsp; The meeting will be on Monday July =
17 from 6:45 to 7:35pm.</div>
<div>&nbsp;</div>
<div>I hope you all can make it and this resolves the conflicts with Tuesda=
y lunch.</div>
<div>&nbsp;</div>
<div>Hi,</div>
<div>&nbsp;</div>
<div>As Deborah mentioned in her email of June 8, Alvaro, Deborah and I tho=
ught it would be useful to get together</div>
<div>with the Routing Directorate for an informal discussion. Please do RSV=
P.</div>
<div>&nbsp;</div>
<div>If there is interest (please unicast), a set of us will head out to di=
nner as well.</div>
<div>If you have specific topics that you think would be good to cover, ple=
ase let us know.</div>
<div>&nbsp;</div>
<div>The meeting time is Monday July 17, 6:45 &#8211; 7:30pm Prague time, i=
n Karlin III.</div>
<div>&nbsp;</div>
<div>Regards,</div>
<div>Alia</div>
<div>&nbsp;</div>
<div>&nbsp;</div>
</span></font>
</body>
</html>

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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 12 Jul 2017 19:19:04 -0700
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To: Carlos Pignataro <cpignata@cisco.com>
Cc: rtg-dir@ietf.org, "mpls@ietf.org" <mpls@ietf.org>,  draft-ietf-mpls-bfd-directed.all@ietf.org, bfd-chairs@ietf.org
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Dear Carlos,
thank you for sharing your detailed comments to the draft. Please find
response in-line and tagged GIM>>.

Regards,
Greg

On Tue, Jul 11, 2017 at 6:59 AM, Carlos Pignataro <cpignata@cisco.com>
wrote:

> Reviewer: Carlos Pignataro
> Review result: Has Issues
>
> Hello
>
> I have been selected to do a routing directorate =E2=80=9Cearly=E2=80=9D =
review of this
> draft.
> https://datatracker.ietf.org/doc/draft-ietf-mpls-bfd-directed/
>
> The routing directorate will, on request from the working group chair,
> perform
> an =E2=80=9Cearly=E2=80=9D review of a draft before it is submitted for p=
ublication to the
> IESG. The early review can be performed at any time during the draft=E2=
=80=99s
> lifetime
> as a working group document. The purpose of the early review depends on t=
he
> stage that the document has reached.
>
> The MPLS chairs have requested an early review from the directorate with
> the
> objective of improving document quality.  This document has had three
> unsuccessful WG LCs.
>
> For more information about the Routing Directorate, please see
> =E2=80=8Bhttp://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir
>
> Document: draft-ietf-mpls-bfd-directed-07.txt
> Reviewer: Carlos Pignataro
> Review Date: Early July, 2017
> Intended Status: Standards Track
>
> Summary:
> I have significant concerns about this document.
> I also recommend a BFD WG Chair or appointee to review this document.
>
> Comments:
>
> First, I have a general concern about the architectural approach in this
> document.
>
> This document is modeled after RFC 7110. RFC 7110 describes the
> specification
> of a return path for MPLS LSP Ping. MPLS LSP Ping uses a request/reply
> command/response paradigm, in which receipt of an Echo Request elicits th=
e
> generation of an Echo Reply.
>
> BFD for MPLS, however, uses a different approach and paradigm (as per RFC
> 5884). An MPLS LSP Ping packet is used as a bootstrap, signaling
> discriminator
> value for a persistent BFD session. After the MPLS LSP Ping signals the
> Discriminator (via MPLS LSP Ping TLV) to use, then BFD control messages a=
re
> sent back and forth.
>
> However, while the BFD session is UP and  BFD control messages and being
> sent
> back and forth, and while no MPLS LSP Ping packets are sent after
> bootstrapping
> -- what happens if the return path changes (e.g., the return LSP goes dow=
n,
> gets unconfigured, etc.)?
>

GIM>> Proposed in the draft mechanism to direct the reverse direction of
the BFD session onto specific MPLS LSP effectively puts the reverse
direction in the same environment as the forward direction of the BFD
session. What happens to the forward direction of the BFD session over MPLS
LSP if the LSP goes down? That must be detected as LSP failure and clients
of the BFD session, I'd expect, will be notified (that is rather outside of
BFD RFCs but we understand why and how proactive OAM is used). If the LSP
gets unconfigured before the BFD session, then, I assume, that will be
detected as LSP failure too. I think that these are very fundamental
scenarios but they are not discussed in RFC 5884 either.

In that case, not only this mechanism can actually make things worst,
> because
> it results in a false negative, but also the document does not specify ho=
w
> the
> system should recover. The I-D seems to assume complete topological
> invariability for it to work long-term, since it does not specify any
> mechanism
> to update or to deal with such a failure or change scenario.
>
GIM>> I disagree with your conclusion that  the draft does not include
mechanism to switch the reverse path of the BFD session in Up state.
Firstly, the BFD Reverse Path TLV MAY be included in LSP Ping at any moment
in time, not only when bootstrapping BFD session. Secondly, the draft
states that if BFD Reverse Path TLV contains none sub-TLVs, then the
reverse path MUST be switched to IP network, which is the default behavior
per RFC 5884.

>
> On the other hand, there is already a BFD mechanism without the
> bootstrapping
> setup and with a command/response like behavior, that is S-BFD, RFC 7881.
> That
> one is notably missing from this draft.
>
GIM>> Frankly, I fail to find relevance of S-BFD to the proposed mechanism.
But if you insist on discussing S-BFD, then I see that its echo-like
mechanism that does not create state on the far end of S-BFD session rather
complicates potential mechanism to control the return path.

>
> Further, there seem to be a number of potentially erroneous assumptions
> made,
> see below.
>
> Additional Comments:
>
>      Bidirectional Forwarding Detection (BFD) Directed Return Path
>
> The title should include that this is *only* for MPLS BFD.
>
GIM>> Accept this editorial change.

>
>    When a BFD session monitors an explicitly routed unidirectional path
>    there may be a need to direct egress BFD peer to use a specific path
>    for the reverse direction of the BFD session.
>
> Scope: is this solution targeted only for "explicitly routed unidirection=
al
> path", and the solution to have the reply come back the exact reverse
> direction? That does not seem to be the case and the solution.
>
GIM>> The mechanism is applicable to BFD over MPLS LSP. The quote
emphasizes one of use cases. Will prepend it , "without loss of generality
..." in the next version.

>
>    [RFC5880], [RFC5881], and [RFC5883] established the BFD protocol for
>    IP networks.  [RFC5884] and [RFC7726] set rules of using BFD
>    asynchronous mode over IP/MPLS LSPs.  These standards implicitly
>    assume that the egress BFD peer will use the shortest path route
>    regardless of route being used to send BFD control packets towards
>    it.
>
> Is "These standards" referring to the three former or the four latter?
>
GIM>> Thank you for pointing to the ambiguity. The reference to the latter
two. Will clarify in the next version.

>
>    For the case where a LSP is explicitly routed it is likely that the
>    shortest return path to the ingress BFD peer would not follow the
>    same path as the LSP in the forward direction.  The fact that BFD
>    control packets are not guaranteed to follow the same links and nodes
>    in both forward and reverse directions is a significant factor in
>    producing false positive defect notifications, i.e. false alarms, if
>    used by the ingress BFD peer to deduce the state of the forward
>    direction.
>
> There may be an implicit mis-assumption in this text and overall approach=
:
> the
> fact that traffic flows on one direction does not imply that the reverse
> direction using the same interfaces and nodes would actually be
> consequently
> properly programmed and working.
>
GIM>> The proposed mechanism is optional and, of course, it has been
assumed that the operator will verify availability and liveliness of the
LSP to be used for the reverse direction of the given BFD session.

>
>    This document defines the BFD Reverse Path TLV as an extension to LSP
>    Ping [RFC8029] and proposes that it is to be used to instruct the
>    egress BFD peer to use an explicit path for its BFD control packets
>    associated with a particular BFD session.
>
> This text assumes that the BFD return path is MPLS. However, my
> understanding
> from RFC 5884 is that this is not necessarily the case, and the return ca=
n
> be
> IP.
>
GIM>> You're absolutely correct in interpretation of RFC 5884, the reverse
direction of BFD session over MPLS LSP is always over IP. The proposed
mechanism provides option to change the default reverse path if and when
network operator sees that beneficial.

>
>    When BFD is used to monitor unidirectional explicitly routed path,
>    e.g.  MPLS-TE LSP, BFD control packets in forward direction would be
>    in-band using the mechanism defined in [RFC5884] and [RFC5586].
>
> Which BFD uses RFC 5586? RFC5586 says that is not needed:
>
GIM>> Can you please clarify what is not needed according to RFC 5586? LSP
Ping? BFD over MPLS-TP LSP?

>
>    "Some of these functions can be supported using existing
>    tools such as Virtual Circuit Connectivity Verification (VCCV)
>    [RFC5085], Bidirectional Forwarding Detection for MPLS LSPs (BFD-
>    MPLS) [BFD-MPLS], LSP-Ping [RFC4379], or BFD-VCCV [BFD-VCCV]."
>
> And then:
>
>    o  a failure detection by ingress node on the reverse path cannot be
>       interpreted as bi-directional failure unambiguously and thus
>       trigger, for example, protection switchover of the forward
>       direction without possibility of being a false positive.
>
>    To address this scenario the egress BFD peer would be instructed to
>    use a specific path for BFD control packets.
>
> But using a specific path for return cannot either imply "interpreted as
> bi-directional failure unambiguously", so the scenario is not *addressed*=
.
>
GIM>> The proposed mechanism to control the reverse path of the BFD session
may improve determinism of defect detection in certain use cases.

>
>    The BFD Reverse Path TLV carries information about the path onto
>    which the egress BFD peer of the BFD session referenced by the BFD
>    Discriminator TLV MUST transmit BFD control packets.  The format of
>    the BFD Reverse Path TLV is as presented in Figure 1.
>
> What does the remote endpoint do with that "MUST" if the return FEC goes
> away?
>
GIM>> Please see my response to the very first question. This is the same
situation as for the ingress LER per RFC 5884.

>
> There also seem to be some self-contradiction. This document says:
>
>    LSP ping, defined in [RFC8029], uses BFD Discriminator TLV [RFC5884]
>    to bootstrap a BFD session over an MPLS LSP.  This document defines a
>    new TLV, BFD Reverse Path TLV, that MUST contain a single sub-TLV
>    that can be used to carry information about the reverse path for the
>    BFD session that is specified by value in BFD Discriminator TLV.
>
> And then says:
>
>    Reverse Path field contains a sub-TLV.
>
> But then says:
>
>    None, one or more sub-TLVs MAY be included in the BFD Reverse
>    Path TLV.  If none sub-TLVs found in the BFD Reverse Path TLV, the
>    egress BFD peer MUST revert to using the default, i.e., over IP
>    network, reverse path.
>
> So is it only one, or none/one/multiple?
>
GIM>> Thank you for pointing to this. In the next version will change to
explicitly state:

Reverse Path field contains none, one or more sub-TLVs.


> I believe it needs to be multiple since then a Tunnel can be specified.
> But the
> document as-is seems self-contradicting.
>
> Further, where has that "default" been defined as "over IP network"?
>
GIM>> As per RFC 5884, the BFD control packets in reverse direction of the
BFD over MPLS LSP session are sent over IP.

>
> There's another contradiction here:
>
>    If the egress LSR cannot find the path specified in the Reverse Path
>    TLV it MUST send Echo Reply with the received Reverse Path TLV and
>    set the Return Code to "Failed to establish the BFD session.  The
>    specified reverse path was not found" Section 3.3.  The egress BFD
>    peer MAY establish the BFD session over IP network as defined in
>    [RFC5884].
>
> So the response is "Failed to establish the BFD session." But then it MAY
> establish the session? And, again, what if the path is found at bootstrap
> but
> lost afterwards?
>
GIM>> Please see the response to the first question.

>
> 4.  Use Case Scenario
>
> The fact that A-B-C-D-G-H works does not mean that the reverse,
> H-G-D-C-B-A,
> will work.
>
> 6.  Security Considerations
>
>    Security considerations discussed in [RFC5880], [RFC5884], [RFC7726],
>    and [RFC8029], apply to this document.
>
> There seem to be additional security considerations with returns taking
> explicit paths, and should be expanded in here.
>
> Net-net, I do have concerns about this document. I believe it is not read=
y
> to
> advance, and could use more whiteboard time as well as a review by BFD
> experts.
>
> Best,
>
> Carlos Pignataro.
>
>

--94eb2c06f22e80c0b20554298ec6
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Dear Carlos,<div>thank you for sharing your detailed comme=
nts to the draft. Please find response in-line and tagged GIM&gt;&gt;.</div=
><div><br></div><div>Regards,</div><div>Greg</div><div class=3D"gmail_extra=
"><br><div class=3D"gmail_quote">On Tue, Jul 11, 2017 at 6:59 AM, Carlos Pi=
gnataro <span dir=3D"ltr">&lt;<a href=3D"mailto:cpignata@cisco.com" target=
=3D"_blank">cpignata@cisco.com</a>&gt;</span> wrote:<br><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex">Reviewer: Carlos Pignataro<br>
Review result: Has Issues<br>
<br>
Hello<br>
<br>
I have been selected to do a routing directorate =E2=80=9Cearly=E2=80=9D re=
view of this draft.<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-mpls-bfd-directed/" =
rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/<wbr>doc/=
draft-ietf-mpls-bfd-<wbr>directed/</a><br>
<br>
The routing directorate will, on request from the working group chair, perf=
orm<br>
an =E2=80=9Cearly=E2=80=9D review of a draft before it is submitted for pub=
lication to the<br>
IESG. The early review can be performed at any time during the draft=E2=80=
=99s lifetime<br>
as a working group document. The purpose of the early review depends on the=
<br>
stage that the document has reached.<br>
<br>
The MPLS chairs have requested an early review from the directorate with th=
e<br>
objective of improving document quality.=C2=A0 This document has had three<=
br>
unsuccessful WG LCs.<br>
<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/<wbr>area/rt=
g/trac/wiki/RtgDir</a><br>
<br>
Document: draft-ietf-mpls-bfd-directed-<wbr>07.txt<br>
Reviewer: Carlos Pignataro<br>
Review Date: Early July, 2017<br>
Intended Status: Standards Track<br>
<br>
Summary:<br>
I have significant concerns about this document.<br>
I also recommend a BFD WG Chair or appointee to review this document.<br>
<br>
Comments:<br>
<br>
First, I have a general concern about the architectural approach in this<br=
>
document.<br>
<br>
This document is modeled after RFC 7110. RFC 7110 describes the specificati=
on<br>
of a return path for MPLS LSP Ping. MPLS LSP Ping uses a request/reply<br>
command/response paradigm, in which receipt of an Echo Request elicits the<=
br>
generation of an Echo Reply.<br>
<br>
BFD for MPLS, however, uses a different approach and paradigm (as per RFC<b=
r>
5884). An MPLS LSP Ping packet is used as a bootstrap, signaling discrimina=
tor<br>
value for a persistent BFD session. After the MPLS LSP Ping signals the<br>
Discriminator (via MPLS LSP Ping TLV) to use, then BFD control messages are=
<br>
sent back and forth.<br>
<br>
However, while the BFD session is UP and=C2=A0 BFD control messages and bei=
ng sent<br>
back and forth, and while no MPLS LSP Ping packets are sent after bootstrap=
ping<br>
-- what happens if the return path changes (e.g., the return LSP goes down,=
<br>
gets unconfigured, etc.)?<br></blockquote><div><br></div><div>GIM&gt;&gt; P=
roposed in the draft mechanism to direct the reverse direction of the BFD s=
ession onto specific MPLS LSP effectively puts the reverse direction in the=
 same environment as the forward direction of the BFD session. What happens=
 to the forward direction of the BFD session over MPLS LSP if the LSP goes =
down? That must be detected as LSP failure and clients of the BFD session, =
I&#39;d expect, will be notified (that is rather outside of BFD RFCs but we=
 understand why and how proactive OAM is used). If the LSP gets unconfigure=
d before the BFD session, then, I assume, that will be detected as LSP fail=
ure too. I think that these are very fundamental scenarios but they are not=
 discussed in RFC 5884 either.</div><div><br></div><blockquote class=3D"gma=
il_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-lef=
t:1ex">
In that case, not only this mechanism can actually make things worst, becau=
se<br>
it results in a false negative, but also the document does not specify how =
the<br>
system should recover. The I-D seems to assume complete topological<br>
invariability for it to work long-term, since it does not specify any mecha=
nism<br>
to update or to deal with such a failure or change scenario.<br></blockquot=
e><div>GIM&gt;&gt; I disagree with your conclusion that =C2=A0the draft doe=
s not include mechanism to switch the reverse path of the BFD session in Up=
 state. Firstly, the BFD Reverse Path TLV MAY be included in LSP Ping at an=
y moment in time, not only when bootstrapping BFD session. Secondly, the dr=
aft states that if BFD Reverse Path TLV contains none sub-TLVs, then the re=
verse path MUST be switched to IP network, which is the default behavior pe=
r RFC 5884.</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8=
ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
On the other hand, there is already a BFD mechanism without the bootstrappi=
ng<br>
setup and with a command/response like behavior, that is S-BFD, RFC 7881. T=
hat<br>
one is notably missing from this draft.<br></blockquote><div>GIM&gt;&gt; Fr=
ankly, I fail to find relevance of S-BFD to the proposed mechanism. But if =
you insist on discussing S-BFD, then I see that its echo-like mechanism tha=
t does not create state on the far end of S-BFD session rather complicates =
potential mechanism to control the return path.</div><blockquote class=3D"g=
mail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-l=
eft:1ex">
<br>
Further, there seem to be a number of potentially erroneous assumptions mad=
e,<br>
see below.<br>
<br>
Additional Comments:<br>
<br>
=C2=A0 =C2=A0 =C2=A0Bidirectional Forwarding Detection (BFD) Directed Retur=
n Path<br>
<br>
The title should include that this is *only* for MPLS BFD.<br></blockquote>=
<div>GIM&gt;&gt; Accept this editorial change.=C2=A0</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex">
<br>
=C2=A0 =C2=A0When a BFD session monitors an explicitly routed unidirectiona=
l path<br>
=C2=A0 =C2=A0there may be a need to direct egress BFD peer to use a specifi=
c path<br>
=C2=A0 =C2=A0for the reverse direction of the BFD session.<br>
<br>
Scope: is this solution targeted only for &quot;explicitly routed unidirect=
ional<br>
path&quot;, and the solution to have the reply come back the exact reverse<=
br>
direction? That does not seem to be the case and the solution.<br></blockqu=
ote><div>GIM&gt;&gt; The mechanism is applicable to BFD over MPLS LSP. The =
quote emphasizes one of use cases. Will prepend it , &quot;without loss of =
generality ...&quot; in the next version.</div><blockquote class=3D"gmail_q=
uote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1e=
x">
<br>
=C2=A0 =C2=A0[RFC5880], [RFC5881], and [RFC5883] established the BFD protoc=
ol for<br>
=C2=A0 =C2=A0IP networks.=C2=A0 [RFC5884] and [RFC7726] set rules of using =
BFD<br>
=C2=A0 =C2=A0asynchronous mode over IP/MPLS LSPs.=C2=A0 These standards imp=
licitly<br>
=C2=A0 =C2=A0assume that the egress BFD peer will use the shortest path rou=
te<br>
=C2=A0 =C2=A0regardless of route being used to send BFD control packets tow=
ards<br>
=C2=A0 =C2=A0it.<br>
<br>
Is &quot;These standards&quot; referring to the three former or the four la=
tter?<br></blockquote><div>GIM&gt;&gt; Thank you for pointing to the ambigu=
ity. The reference to the latter two. Will clarify in the next version.=C2=
=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;borde=
r-left:1px #ccc solid;padding-left:1ex">
<br>
=C2=A0 =C2=A0For the case where a LSP is explicitly routed it is likely tha=
t the<br>
=C2=A0 =C2=A0shortest return path to the ingress BFD peer would not follow =
the<br>
=C2=A0 =C2=A0same path as the LSP in the forward direction.=C2=A0 The fact =
that BFD<br>
=C2=A0 =C2=A0control packets are not guaranteed to follow the same links an=
d nodes<br>
=C2=A0 =C2=A0in both forward and reverse directions is a significant factor=
 in<br>
=C2=A0 =C2=A0producing false positive defect notifications, i.e. false alar=
ms, if<br>
=C2=A0 =C2=A0used by the ingress BFD peer to deduce the state of the forwar=
d<br>
=C2=A0 =C2=A0direction.<br>
<br>
There may be an implicit mis-assumption in this text and overall approach: =
the<br>
fact that traffic flows on one direction does not imply that the reverse<br=
>
direction using the same interfaces and nodes would actually be consequentl=
y<br>
properly programmed and working.<br></blockquote><div>GIM&gt;&gt; The propo=
sed mechanism is optional and, of course, it has been assumed that the oper=
ator will verify availability and liveliness of the LSP to be used for the =
reverse direction of the given BFD session. =C2=A0</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex">
<br>
=C2=A0 =C2=A0This document defines the BFD Reverse Path TLV as an extension=
 to LSP<br>
=C2=A0 =C2=A0Ping [RFC8029] and proposes that it is to be used to instruct =
the<br>
=C2=A0 =C2=A0egress BFD peer to use an explicit path for its BFD control pa=
ckets<br>
=C2=A0 =C2=A0associated with a particular BFD session.<br>
<br>
This text assumes that the BFD return path is MPLS. However, my understandi=
ng<br>
from RFC 5884 is that this is not necessarily the case, and the return can =
be<br>
IP.<br></blockquote><div>GIM&gt;&gt; You&#39;re absolutely correct in inter=
pretation of RFC 5884, the reverse direction of BFD session over MPLS LSP i=
s always over IP. The proposed mechanism provides option to change the defa=
ult reverse path if and when network operator sees that beneficial.=C2=A0</=
div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-lef=
t:1px #ccc solid;padding-left:1ex">
<br>
=C2=A0 =C2=A0When BFD is used to monitor unidirectional explicitly routed p=
ath,<br>
=C2=A0 =C2=A0e.g.=C2=A0 MPLS-TE LSP, BFD control packets in forward directi=
on would be<br>
=C2=A0 =C2=A0in-band using the mechanism defined in [RFC5884] and [RFC5586]=
.<br>
<br>
Which BFD uses RFC 5586? RFC5586 says that is not needed:<br></blockquote><=
div>GIM&gt;&gt; Can you please clarify what is not needed according to RFC =
5586? LSP Ping? BFD over MPLS-TP LSP?=C2=A0</div><blockquote class=3D"gmail=
_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:=
1ex">
<br>
=C2=A0 =C2=A0&quot;Some of these functions can be supported using existing<=
br>
=C2=A0 =C2=A0tools such as Virtual Circuit Connectivity Verification (VCCV)=
<br>
=C2=A0 =C2=A0[RFC5085], Bidirectional Forwarding Detection for MPLS LSPs (B=
FD-<br>
=C2=A0 =C2=A0MPLS) [BFD-MPLS], LSP-Ping [RFC4379], or BFD-VCCV [BFD-VCCV].&=
quot;<br>
<br>
And then:<br>
<br>
=C2=A0 =C2=A0o=C2=A0 a failure detection by ingress node on the reverse pat=
h cannot be<br>
=C2=A0 =C2=A0 =C2=A0 interpreted as bi-directional failure unambiguously an=
d thus<br>
=C2=A0 =C2=A0 =C2=A0 trigger, for example, protection switchover of the for=
ward<br>
=C2=A0 =C2=A0 =C2=A0 direction without possibility of being a false positiv=
e.<br>
<br>
=C2=A0 =C2=A0To address this scenario the egress BFD peer would be instruct=
ed to<br>
=C2=A0 =C2=A0use a specific path for BFD control packets.<br>
<br>
But using a specific path for return cannot either imply &quot;interpreted =
as<br>
bi-directional failure unambiguously&quot;, so the scenario is not *address=
ed*.<br></blockquote><div>GIM&gt;&gt; The proposed mechanism to control the=
 reverse path of the BFD session may improve determinism of defect detectio=
n in certain use cases.</div><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
=C2=A0 =C2=A0The BFD Reverse Path TLV carries information about the path on=
to<br>
=C2=A0 =C2=A0which the egress BFD peer of the BFD session referenced by the=
 BFD<br>
=C2=A0 =C2=A0Discriminator TLV MUST transmit BFD control packets.=C2=A0 The=
 format of<br>
=C2=A0 =C2=A0the BFD Reverse Path TLV is as presented in Figure 1.<br>
<br>
What does the remote endpoint do with that &quot;MUST&quot; if the return F=
EC goes away?<br></blockquote><div>GIM&gt;&gt; Please see my response to th=
e very first question. This is the same situation as for the ingress LER pe=
r RFC 5884.=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 =
0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
There also seem to be some self-contradiction. This document says:<br>
<br>
=C2=A0 =C2=A0LSP ping, defined in [RFC8029], uses BFD Discriminator TLV [RF=
C5884]<br>
=C2=A0 =C2=A0to bootstrap a BFD session over an MPLS LSP.=C2=A0 This docume=
nt defines a<br>
=C2=A0 =C2=A0new TLV, BFD Reverse Path TLV, that MUST contain a single sub-=
TLV<br>
=C2=A0 =C2=A0that can be used to carry information about the reverse path f=
or the<br>
=C2=A0 =C2=A0BFD session that is specified by value in BFD Discriminator TL=
V.<br>
<br>
And then says:<br>
<br>
=C2=A0 =C2=A0Reverse Path field contains a sub-TLV.<br>
<br>
But then says:<br>
<br>
=C2=A0 =C2=A0None, one or more sub-TLVs MAY be included in the BFD Reverse<=
br>
=C2=A0 =C2=A0Path TLV.=C2=A0 If none sub-TLVs found in the BFD Reverse Path=
 TLV, the<br>
=C2=A0 =C2=A0egress BFD peer MUST revert to using the default, i.e., over I=
P<br>
=C2=A0 =C2=A0network, reverse path.<br>
<br>
So is it only one, or none/one/multiple?<br></blockquote><div>GIM&gt;&gt; T=
hank you for pointing to this. In the next version will change to explicitl=
y state:</div></div></div><blockquote style=3D"margin:0 0 0 40px;border:non=
e;padding:0px"><div class=3D"gmail_extra"><div class=3D"gmail_quote"><div>R=
everse Path field contains none, one or more sub-TLVs.</div></div></div></b=
lockquote><div class=3D"gmail_extra"><div class=3D"gmail_quote"><blockquote=
 class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc soli=
d;padding-left:1ex">
<br>
I believe it needs to be multiple since then a Tunnel can be specified. But=
 the<br>
document as-is seems self-contradicting.<br>
<br>
Further, where has that &quot;default&quot; been defined as &quot;over IP n=
etwork&quot;?<br></blockquote><div>GIM&gt;&gt; As per RFC 5884, the BFD con=
trol packets in reverse direction of the BFD over MPLS LSP session are sent=
 over IP.</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex=
;border-left:1px #ccc solid;padding-left:1ex">
<br>
There&#39;s another contradiction here:<br>
<br>
=C2=A0 =C2=A0If the egress LSR cannot find the path specified in the Revers=
e Path<br>
=C2=A0 =C2=A0TLV it MUST send Echo Reply with the received Reverse Path TLV=
 and<br>
=C2=A0 =C2=A0set the Return Code to &quot;Failed to establish the BFD sessi=
on.=C2=A0 The<br>
=C2=A0 =C2=A0specified reverse path was not found&quot; Section 3.3.=C2=A0 =
The egress BFD<br>
=C2=A0 =C2=A0peer MAY establish the BFD session over IP network as defined =
in<br>
=C2=A0 =C2=A0[RFC5884].<br>
<br>
So the response is &quot;Failed to establish the BFD session.&quot; But the=
n it MAY<br>
establish the session? And, again, what if the path is found at bootstrap b=
ut<br>
lost afterwards?<br></blockquote><div>GIM&gt;&gt; Please see the response t=
o the first question.=C2=A0</div><blockquote class=3D"gmail_quote" style=3D=
"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
4.=C2=A0 Use Case Scenario<br>
<br>
The fact that A-B-C-D-G-H works does not mean that the reverse, H-G-D-C-B-A=
,<br>
will work.<br>
<br>
6.=C2=A0 Security Considerations<br>
<br>
=C2=A0 =C2=A0Security considerations discussed in [RFC5880], [RFC5884], [RF=
C7726],<br>
=C2=A0 =C2=A0and [RFC8029], apply to this document.<br>
<br>
There seem to be additional security considerations with returns taking<br>
explicit paths, and should be expanded in here.<br>
<br>
Net-net, I do have concerns about this document. I believe it is not ready =
to<br>
advance, and could use more whiteboard time as well as a review by BFD expe=
rts.<br>
<br>
Best,<br>
<br>
Carlos Pignataro.<br>
<br>
</blockquote></div><br></div></div>

--94eb2c06f22e80c0b20554298ec6--


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From: Pushpasis Sarkar <pushpasis.ietf@gmail.com>
Date: Thu, 13 Jul 2017 17:24:54 -0700
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To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
Cc: "idr-ads@ietf.org" <idr-ads@ietf.org>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>,  "draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.org" <draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.org>,  "idr@ietf. org" <idr@ietf.org>
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Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-bgp-ls-node-admin-tag-extension-01
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Hi Les,

Sorry once again for the late response. Please find comments inline...


On Sat, Jul 8, 2017 at 1:42 PM, Les Ginsberg (ginsberg) <ginsberg@cisco.com=
>
wrote:

> Pushpassis =E2=80=93
>
>
>
> Sorry for the delay in responding.
>
> You have not addressed all of the editorial comments I provided =E2=80=93=
 please
> do a second pass.
>
[Pushpasis] I did a second pass.. But I could not locate which one(s) I
missed out. It will be great if you list them out for me. The htmlized diff
you attached earlier does not exactly highlight the diffs.. :( Request your
help here...


>
>
> Also, there is one substantive issue which you did not address:
>
>
>
> *<snip>*
>
> *Section 3.1 Last paragraph*
>
>
>
> *I recognize this statement regarding policy being used to filter what is=
*
>
> *advertised is consistent with RFC 7752. But it would also be good to
> include*
>
> *a statement like:*
>
>
>
> *"Definition of such a policy is outside the scope of this document."*
>
> *<end snip>*
>
>
>
> If you have a concern with what I proposed please let me know what it is.
>
[Pushpasis] I will be very happy to add the statement.  Thanks a lot for
the suggestion.

Thanks and Regards,
-Pushpasis

>
>
> Thanx.
>
>
>
>    Les
>
>
>
>
>
>
>
> *From:* Pushpasis Sarkar [mailto:pushpasis.ietf@gmail.com]
> *Sent:* Tuesday, July 04, 2017 8:58 PM
> *To:* Les Ginsberg (ginsberg)
> *Cc:* idr-ads@ietf.org; rtg-dir@ietf.org; draft-ietf-idr-bgp-ls-node-
> admin-tag-extension.all@ietf.org; idr@ietf. org
> *Subject:* Re: RtgDir review: draft-ietf-idr-bgp-ls-node-
> admin-tag-extension-01
>
>
>
> Hi Les,
>
>
>
> Thank you once more for the review comments. And sorry for the late reply=
.
> I have addressed all your comments in the attached draft. Please review t=
he
> same let me know if you have any more comments. If not I will upload the
> draft soon.
>
>
>
> Thanks and regards,
>
> -Pushpasis
>
>
>
> On Wed, Jun 28, 2017 at 10:26 PM, Pushpasis Sarkar <
> pushpasis.ietf@gmail.com> wrote:
>
> Hi Les,
>
>
>
> Thanks a lot for the review comments. I will reply back addressing your
> comments soon.
>
>
>
> Thanks and regards
>
> -Pushpasis
>
>
>
> On Tue, Jun 27, 2017 at 11:37 PM, Les Ginsberg (ginsberg) <
> ginsberg@cisco.com> wrote:
>
> 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, plea=
se
> 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
> comments that you receive, and strive to resolve them through discussion =
or
> by updating the draft.
>
>
> Document: draft-ietf-idr-bgp-ls-node-admin-tag-extension-01
> Reviewer: Les Ginsberg
> Review Date: June 27, 2017
> Intended Status: Standards
>
> Summary:  The document is of modest scope - covering definition of BGP-LS
> codepoints for a relatively new IGP attribute (Node Admin Tags).
> While I found nothing which I would consider a major issue, there are a
> number
> of places where the text lacks clarity. I think addressing these areas
> would
> greatly improve the quality of the draft.
>
>
> Major Issues: None
>
> Minor Issues:
>
> Section 1 Introduction
>
> The acronym LSDB is not defined.
>
> Figure 1
>
> I have a personal dislike for duplicating text/pictures from another
> spec when that spec could simply be referenced. There are only two
> possible outcomes:
>
> 1)The duplicated text is redundant (best case)
> 2)The text differs somewhat from the original leading to possible
> unintentional misinterpretations.
>
> Suit yourself on this comment - but I would prefer the duplication be
> omitted.
>
> Section 2 First paragraph
>
> You refer to "sub-TLV" but that reference is unclear and ambiguous.
> IS-IS uses a sub-TLV of Router Capability to advertise tags, but OSPF
> uses a TLV of Router Info LSA.
> What seems most relevant here is that you are defining a new Attribute
> TLV for Node NLRI.
>
> Section 3 Second paragraph
>
> I do not know what the paragraph is trying to say, nor do
> I know what the "TBD" in columns 4 and 5 in the following Table 1 is
> meant to reference. If you are simply trying to describe the source
> of the info advertised by the new BGP-LS Node attribute then you should
> rewrite the above paragraph and in the figure below show:
>
> IS-IS 242/21
> OSPF RI-LSA/10
>
> Section 3.1
>
> A description of where in the Node NLRI the area/level information can be
> found
> (from RFC 7752) would be helpful.
>
>
> Section 3.1 Penultimate Paragraph
>
> As TAGs with "global" scope will be advertised by the IGP multiple
> times (once per area/level) I assume you are asking BGP-LS advertisements
> to reduce these multiple occurrences to a single occurrence? More
> explicit language on that point would be helpful.
>
> Section 3.1 Last paragraph
>
> I recognize this statement regarding policy being used to filter what is
> advertised is consistent with RFC 7752. But it would also be good to
> include
> a statement like:
>
> "Definition of such a policy is outside the scope of this document."
>
> Nits: Please see attached diff file with some editorial corrections.
>
>
>
>
>

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<div dir=3D"ltr">Hi Les,<div><br></div><div>Sorry once again for the late r=
esponse. Please find comments inline...</div><div><br></div><div class=3D"g=
mail_extra"><br><div class=3D"gmail_quote">On Sat, Jul 8, 2017 at 1:42 PM, =
Les Ginsberg (ginsberg) <span dir=3D"ltr">&lt;<a href=3D"mailto:ginsberg@ci=
sco.com" target=3D"_blank">ginsberg@cisco.com</a>&gt;</span> wrote:<br><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #c=
cc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_1154821204407878896WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Pushpassis =E2=80=93<u></=
u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Sorry for the delay in re=
sponding.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">You have not addressed al=
l of the editorial comments I provided =E2=80=93 please do a second pass.</=
span></p></div></div></blockquote><div>[Pushpasis] I did a second pass.. Bu=
t I could not locate which one(s) I missed out. It will be great if you lis=
t them out for me. The htmlized diff you attached earlier does not exactly =
highlight the diffs.. :( Request your help here...=C2=A0</div><div>=C2=A0</=
div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-lef=
t:1px #ccc solid;padding-left:1ex"><div lang=3D"EN-US" link=3D"blue" vlink=
=3D"purple"><div class=3D"m_1154821204407878896WordSection1"><p class=3D"Ms=
oNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1f497d"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Also, there is one substa=
ntive issue which you did not address:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d">&lt;snip&gt;<u></u><u></u></span></i></p><span class=3D"">
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d">Section 3.1 Last paragraph<u></u><u></u></span></i></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d"><u></u>=C2=A0<u></u></span></i></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d">I recognize this statement regarding policy being used to filter what =
is<u></u><u></u></span></i></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d">advertised is consistent with RFC 7752. But it would also be good to i=
nclude<u></u><u></u></span></i></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d">a statement like:<u></u><u></u></span></i></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d"><u></u>=C2=A0<u></u></span></i></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d">&quot;Definition of such a policy is outside the scope of this documen=
t.&quot;<u></u><u></u></span></i></p>
</span><p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"=
font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;col=
or:#1f497d">&lt;end snip&gt;<u></u><u></u></span></i></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d"><u></u>=C2=A0<u></u></span></i></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">If you have a concern wit=
h what I proposed please let me know what it is.</span></p></div></div></bl=
ockquote><div>[Pushpasis] I will be very happy to add the statement.=C2=A0 =
Thanks a lot for the suggestion.</div><div><br></div><div>Thanks and Regard=
s,</div><div>-Pushpasis</div><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"EN=
-US" link=3D"blue" vlink=3D"purple"><div class=3D"m_1154821204407878896Word=
Section1"><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-famil=
y:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f497d">
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Thanx.<u></u><u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 Les<u></u><u=
></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Pushpasi=
s Sarkar [mailto:<a href=3D"mailto:pushpasis.ietf@gmail.com" target=3D"_bla=
nk">pushpasis.ietf@gmail.<wbr>com</a>]
<br>
<b>Sent:</b> Tuesday, July 04, 2017 8:58 PM<br>
<b>To:</b> Les Ginsberg (ginsberg)<br>
<b>Cc:</b> <a href=3D"mailto:idr-ads@ietf.org" target=3D"_blank">idr-ads@ie=
tf.org</a>; <a href=3D"mailto:rtg-dir@ietf.org" target=3D"_blank">rtg-dir@i=
etf.org</a>; <a href=3D"mailto:draft-ietf-idr-bgp-ls-node-admin-tag-extensi=
on.all@ietf.org" target=3D"_blank">draft-ietf-idr-bgp-ls-node-<wbr>admin-ta=
g-extension.all@ietf.<wbr>org</a>; idr@ietf. org<br>
<b>Subject:</b> Re: RtgDir review: draft-ietf-idr-bgp-ls-node-<wbr>admin-ta=
g-extension-01<u></u><u></u></span></p>
</div>
</div><div><div class=3D"h5">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">Hi Les,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thank you once more for the review comments. And sor=
ry for the late reply. I have addressed all your comments in the attached d=
raft. Please review the same let me know if you have any more comments. If =
not I will upload the draft soon.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks and regards,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">-Pushpasis<u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Wed, Jun 28, 2017 at 10:26 PM, Pushpasis Sarkar &=
lt;<a href=3D"mailto:pushpasis.ietf@gmail.com" target=3D"_blank">pushpasis.=
ietf@gmail.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">Hi Les,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks a lot for the review comments. I will reply b=
ack addressing your comments soon.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks and regards<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:#888888">-Pushpasis<u></u><u></=
u></span></p>
</div>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Tue, Jun 27, 2017 at 11:37 PM, Les Ginsberg (gins=
berg) &lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@=
cisco.com</a>&gt; wrote:<u></u><u></u></p>
<p class=3D"MsoNormal">Hello,<br>
<br>
=C2=A0I have been selected as the Routing Directorate reviewer for this dra=
ft. The Routing Directorate seeks to review all routing or routing-related =
drafts as they pass through IETF last call and IESG review, and sometimes o=
n special request. The purpose of the
 review is to provide assistance to the Routing ADs. For more information a=
bout the Routing Directorate, please see=C2=A0
<a href=3D"http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir" target=3D"=
_blank">http://trac.tools.ietf.org/<wbr>area/rtg/trac/wiki/RtgDir</a> .<br>
<br>
Although these comments are primarily for the use of the Routing ADs, it wo=
uld be helpful if you could consider them along with any other IETF comment=
s that you receive, and strive to resolve them through discussion or by upd=
ating the draft.<br>
<br>
<br>
Document: draft-ietf-idr-bgp-ls-node-<wbr>admin-tag-extension-01<br>
Reviewer: Les Ginsberg<br>
Review Date: June 27, 2017<br>
Intended Status: Standards<br>
<br>
Summary:=C2=A0 The document is of modest scope - covering definition of BGP=
-LS<br>
codepoints for a relatively new IGP attribute (Node Admin Tags).<br>
While I found nothing which I would consider a major issue, there are a num=
ber<br>
of places where the text lacks clarity. I think addressing these areas woul=
d<br>
greatly improve the quality of the draft.<br>
<br>
<br>
Major Issues: None<br>
<br>
Minor Issues:<br>
<br>
Section 1 Introduction<br>
<br>
The acronym LSDB is not defined.<br>
<br>
Figure 1<br>
<br>
I have a personal dislike for duplicating text/pictures from another<br>
spec when that spec could simply be referenced. There are only two<br>
possible outcomes:<br>
<br>
1)The duplicated text is redundant (best case)<br>
2)The text differs somewhat from the original leading to possible<br>
unintentional misinterpretations.<br>
<br>
Suit yourself on this comment - but I would prefer the duplication be omitt=
ed.<br>
<br>
Section 2 First paragraph<br>
<br>
You refer to &quot;sub-TLV&quot; but that reference is unclear and ambiguou=
s.<br>
IS-IS uses a sub-TLV of Router Capability to advertise tags, but OSPF<br>
uses a TLV of Router Info LSA.<br>
What seems most relevant here is that you are defining a new Attribute<br>
TLV for Node NLRI.<br>
<br>
Section 3 Second paragraph<br>
<br>
I do not know what the paragraph is trying to say, nor do<br>
I know what the &quot;TBD&quot; in columns 4 and 5 in the following Table 1=
 is<br>
meant to reference. If you are simply trying to describe the source<br>
of the info advertised by the new BGP-LS Node attribute then you should<br>
rewrite the above paragraph and in the figure below show:<br>
<br>
IS-IS 242/21<br>
OSPF RI-LSA/10<br>
<br>
Section 3.1<br>
<br>
A description of where in the Node NLRI the area/level information can be f=
ound<br>
(from RFC 7752) would be helpful.<br>
<br>
<br>
Section 3.1 Penultimate Paragraph<br>
<br>
As TAGs with &quot;global&quot; scope will be advertised by the IGP multipl=
e<br>
times (once per area/level) I assume you are asking BGP-LS advertisements<b=
r>
to reduce these multiple occurrences to a single occurrence? More<br>
explicit language on that point would be helpful.<br>
<br>
Section 3.1 Last paragraph<br>
<br>
I recognize this statement regarding policy being used to filter what is<br=
>
advertised is consistent with RFC 7752. But it would also be good to includ=
e<br>
a statement like:<br>
<br>
&quot;Definition of such a policy is outside the scope of this document.&qu=
ot;<br>
<br>
Nits: Please see attached diff file with some editorial corrections.<u></u>=
<u></u></p>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div></div></div>
</div>
</div>

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

--001a1147f9ea0d569705543c1413--


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To: "'Pushpasis Sarkar'" <pushpasis.ietf@gmail.com>, "'Les Ginsberg \(ginsberg\)'" <ginsberg@cisco.com>
Cc: <rtg-dir@ietf.org>, <idr-ads@ietf.org>, <draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.org>, "'idr@ietf. org'" <idr@ietf.org>
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Subject: Re: [RTG-DIR] [Idr] RtgDir review: draft-ietf-idr-bgp-ls-node-admin-tag-extension-01 - WG LC extended (7/15-7/22)
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Pushpasis and Less:=20

=20

We appreciate you working hard to close these issues.  The WG LC will =
stay open for 1 more week.  Please try to close on these issues within =
this week.=20

=20

Thank you,=20

=20

Sue Hares=20

=20

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Pushpasis Sarkar
Sent: Thursday, July 13, 2017 8:25 PM
To: Les Ginsberg (ginsberg)
Cc: rtg-dir@ietf.org; idr-ads@ietf.org; =
draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.org; idr@ietf. =
org
Subject: Re: [Idr] RtgDir review: =
draft-ietf-idr-bgp-ls-node-admin-tag-extension-01

=20

Hi Les,

=20

Sorry once again for the late response. Please find comments inline...

=20

=20

On Sat, Jul 8, 2017 at 1:42 PM, Les Ginsberg (ginsberg) =
<ginsberg@cisco.com> wrote:

Pushpassis =E2=80=93

=20

Sorry for the delay in responding.

You have not addressed all of the editorial comments I provided =
=E2=80=93 please do a second pass.

[Pushpasis] I did a second pass.. But I could not locate which one(s) I =
missed out. It will be great if you list them out for me. The htmlized =
diff you attached earlier does not exactly highlight the diffs.. :( =
Request your help here...=20

=20

=20

Also, there is one substantive issue which you did not address:

=20

<snip>

Section 3.1 Last paragraph

=20

I recognize this statement regarding policy being used to filter what is

advertised is consistent with RFC 7752. But it would also be good to =
include

a statement like:

=20

"Definition of such a policy is outside the scope of this document."

<end snip>

=20

If you have a concern with what I proposed please let me know what it =
is.

[Pushpasis] I will be very happy to add the statement.  Thanks a lot for =
the suggestion.

=20

Thanks and Regards,

-Pushpasis

=20

Thanx.

=20

   Les

=20

=20

=20

From: Pushpasis Sarkar [mailto:pushpasis.ietf@gmail.com]=20
Sent: Tuesday, July 04, 2017 8:58 PM
To: Les Ginsberg (ginsberg)
Cc: idr-ads@ietf.org; rtg-dir@ietf.org; =
draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.org; idr@ietf. =
org
Subject: Re: RtgDir review: =
draft-ietf-idr-bgp-ls-node-admin-tag-extension-01

=20

Hi Les,

=20

Thank you once more for the review comments. And sorry for the late =
reply. I have addressed all your comments in the attached draft. Please =
review the same let me know if you have any more comments. If not I will =
upload the draft soon.

=20

Thanks and regards,

-Pushpasis

=20

On Wed, Jun 28, 2017 at 10:26 PM, Pushpasis Sarkar =
<pushpasis.ietf@gmail.com> wrote:

Hi Les,

=20

Thanks a lot for the review comments. I will reply back addressing your =
comments soon.

=20

Thanks and regards

-Pushpasis

=20

On Tue, Jun 27, 2017 at 11:37 PM, Les Ginsberg (ginsberg) =
<ginsberg@cisco.com> wrote:

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 =
comments that you receive, and strive to resolve them through discussion =
or by updating the draft.


Document: draft-ietf-idr-bgp-ls-node-admin-tag-extension-01
Reviewer: Les Ginsberg
Review Date: June 27, 2017
Intended Status: Standards

Summary:  The document is of modest scope - covering definition of =
BGP-LS
codepoints for a relatively new IGP attribute (Node Admin Tags).
While I found nothing which I would consider a major issue, there are a =
number
of places where the text lacks clarity. I think addressing these areas =
would
greatly improve the quality of the draft.


Major Issues: None

Minor Issues:

Section 1 Introduction

The acronym LSDB is not defined.

Figure 1

I have a personal dislike for duplicating text/pictures from another
spec when that spec could simply be referenced. There are only two
possible outcomes:

1)The duplicated text is redundant (best case)
2)The text differs somewhat from the original leading to possible
unintentional misinterpretations.

Suit yourself on this comment - but I would prefer the duplication be =
omitted.

Section 2 First paragraph

You refer to "sub-TLV" but that reference is unclear and ambiguous.
IS-IS uses a sub-TLV of Router Capability to advertise tags, but OSPF
uses a TLV of Router Info LSA.
What seems most relevant here is that you are defining a new Attribute
TLV for Node NLRI.

Section 3 Second paragraph

I do not know what the paragraph is trying to say, nor do
I know what the "TBD" in columns 4 and 5 in the following Table 1 is
meant to reference. If you are simply trying to describe the source
of the info advertised by the new BGP-LS Node attribute then you should
rewrite the above paragraph and in the figure below show:

IS-IS 242/21
OSPF RI-LSA/10

Section 3.1

A description of where in the Node NLRI the area/level information can =
be found
(from RFC 7752) would be helpful.


Section 3.1 Penultimate Paragraph

As TAGs with "global" scope will be advertised by the IGP multiple
times (once per area/level) I assume you are asking BGP-LS =
advertisements
to reduce these multiple occurrences to a single occurrence? More
explicit language on that point would be helpful.

Section 3.1 Last paragraph

I recognize this statement regarding policy being used to filter what is
advertised is consistent with RFC 7752. But it would also be good to =
include
a statement like:

"Definition of such a policy is outside the scope of this document."

Nits: Please see attached diff file with some editorial corrections.

=20

=20

=20


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<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Pushpasis and Less: <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>We appreciate you working hard to close these issues.=C2=A0 The WG LC =
will stay open for 1 more week.=C2=A0 Please try to close on these =
issues within this week. <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Thank you, <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue Hares <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of </b>Pushpasis =
Sarkar<br><b>Sent:</b> Thursday, July 13, 2017 8:25 PM<br><b>To:</b> Les =
Ginsberg (ginsberg)<br><b>Cc:</b> rtg-dir@ietf.org; idr-ads@ietf.org; =
draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.org; idr@ietf. =
org<br><b>Subject:</b> Re: [Idr] RtgDir review: =
draft-ietf-idr-bgp-ls-node-admin-tag-extension-01<o:p></o:p></span></p><p=
 class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal>Hi =
Les,<o:p></o:p></p><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>Sorry once again for the late response. Please find =
comments inline...<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal>On Sat, =
Jul 8, 2017 at 1:42 PM, Les Ginsberg (ginsberg) &lt;<a =
href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; =
wrote:<o:p></o:p></p><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Pushpassis =E2=80=93</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sorry for the delay in responding.</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>You have not addressed all of the editorial comments I provided =
=E2=80=93 please do a second =
pass.</span><o:p></o:p></p></div></div><div><p =
class=3DMsoNormal>[Pushpasis] I did a second pass.. But I could not =
locate which one(s) I missed out. It will be great if you list them out =
for me. The htmlized diff you attached earlier does not exactly =
highlight the diffs.. :( Request your help =
here...&nbsp;<o:p></o:p></p></div><div><p =
class=3DMsoNormal>&nbsp;<o:p></o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Also, there is one substantive issue which you did not =
address:</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&lt;snip&gt;</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Section 3.1 Last paragraph</span></i><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>I recognize this statement regarding policy being used to filter what =
is</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>advertised is consistent with RFC 7752. But it would also be good to =
include</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>a statement like:</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&quot;Definition of such a policy is outside the scope of this =
document.&quot;</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&lt;end snip&gt;</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>If you have a concern with what I proposed please let me know what it =
is.</span><o:p></o:p></p></div></div></blockquote><div><p =
class=3DMsoNormal>[Pushpasis] I will be very happy to add the =
statement.&nbsp; Thanks a lot for the =
suggestion.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>Thanks and Regards,<o:p></o:p></p></div><div><p =
class=3DMsoNormal>-Pushpasis<o:p></o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Thanx.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;&nbsp; Les</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt'><div><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Pushpasis Sarkar [mailto:<a href=3D"mailto:pushpasis.ietf@gmail.com" =
target=3D"_blank">pushpasis.ietf@gmail.com</a>] <br><b>Sent:</b> =
Tuesday, July 04, 2017 8:58 PM<br><b>To:</b> Les Ginsberg =
(ginsberg)<br><b>Cc:</b> <a href=3D"mailto:idr-ads@ietf.org" =
target=3D"_blank">idr-ads@ietf.org</a>; <a =
href=3D"mailto:rtg-dir@ietf.org" target=3D"_blank">rtg-dir@ietf.org</a>; =
<a =
href=3D"mailto:draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.or=
g" =
target=3D"_blank">draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf=
.org</a>; idr@ietf. org<br><b>Subject:</b> Re: RtgDir review: =
draft-ietf-idr-bgp-ls-node-admin-tag-extension-01</span><o:p></o:p></p></=
div></div><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hi =
Les,<o:p></o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thank you =
once more for the review comments. And sorry for the late reply. I have =
addressed all your comments in the attached draft. Please review the =
same let me know if you have any more comments. If not I will upload the =
draft soon.<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thanks and =
regards,<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>-Pushpasis<o=
:p></o:p></p></div></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Wed, Jun =
28, 2017 at 10:26 PM, Pushpasis Sarkar &lt;<a =
href=3D"mailto:pushpasis.ietf@gmail.com" =
target=3D"_blank">pushpasis.ietf@gmail.com</a>&gt; =
wrote:<o:p></o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hi =
Les,<o:p></o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thanks a =
lot for the review comments. I will reply back addressing your comments =
soon.<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thanks and =
regards<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'color:#888888'>-Pushpasis</span><o:p></o:p></p></div></div><div>=
<div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Tue, Jun =
27, 2017 at 11:37 PM, Les Ginsberg (ginsberg) &lt;<a =
href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hello,<br><b=
r>&nbsp;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&nbsp; <a =
href=3D"http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir" =
target=3D"_blank">http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir</a=
> .<br><br>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 comments that you receive, and strive to resolve them =
through discussion or by updating the draft.<br><br><br>Document: =
draft-ietf-idr-bgp-ls-node-admin-tag-extension-01<br>Reviewer: Les =
Ginsberg<br>Review Date: June 27, 2017<br>Intended Status: =
Standards<br><br>Summary:&nbsp; The document is of modest scope - =
covering definition of BGP-LS<br>codepoints for a relatively new IGP =
attribute (Node Admin Tags).<br>While I found nothing which I would =
consider a major issue, there are a number<br>of places where the text =
lacks clarity. I think addressing these areas would<br>greatly improve =
the quality of the draft.<br><br><br>Major Issues: None<br><br>Minor =
Issues:<br><br>Section 1 Introduction<br><br>The acronym LSDB is not =
defined.<br><br>Figure 1<br><br>I have a personal dislike for =
duplicating text/pictures from another<br>spec when that spec could =
simply be referenced. There are only two<br>possible =
outcomes:<br><br>1)The duplicated text is redundant (best case)<br>2)The =
text differs somewhat from the original leading to =
possible<br>unintentional misinterpretations.<br><br>Suit yourself on =
this comment - but I would prefer the duplication be =
omitted.<br><br>Section 2 First paragraph<br><br>You refer to =
&quot;sub-TLV&quot; but that reference is unclear and =
ambiguous.<br>IS-IS uses a sub-TLV of Router Capability to advertise =
tags, but OSPF<br>uses a TLV of Router Info LSA.<br>What seems most =
relevant here is that you are defining a new Attribute<br>TLV for Node =
NLRI.<br><br>Section 3 Second paragraph<br><br>I do not know what the =
paragraph is trying to say, nor do<br>I know what the &quot;TBD&quot; in =
columns 4 and 5 in the following Table 1 is<br>meant to reference. If =
you are simply trying to describe the source<br>of the info advertised =
by the new BGP-LS Node attribute then you should<br>rewrite the above =
paragraph and in the figure below show:<br><br>IS-IS 242/21<br>OSPF =
RI-LSA/10<br><br>Section 3.1<br><br>A description of where in the Node =
NLRI the area/level information can be found<br>(from RFC 7752) would be =
helpful.<br><br><br>Section 3.1 Penultimate Paragraph<br><br>As TAGs =
with &quot;global&quot; scope will be advertised by the IGP =
multiple<br>times (once per area/level) I assume you are asking BGP-LS =
advertisements<br>to reduce these multiple occurrences to a single =
occurrence? More<br>explicit language on that point would be =
helpful.<br><br>Section 3.1 Last paragraph<br><br>I recognize this =
statement regarding policy being used to filter what is<br>advertised is =
consistent with RFC 7752. But it would also be good to include<br>a =
statement like:<br><br>&quot;Definition of such a policy is outside the =
scope of this document.&quot;<br><br>Nits: Please see attached diff file =
with some editorial corrections.<o:p></o:p></p></div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p></div></div></div></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p></div></div></div></div></div></div></blockquote></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></div></div></body></html>
------=_NextPart_000_0074_01D2FDC9.739BF460--


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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
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CC: "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "idr-ads@ietf.org" <idr-ads@ietf.org>, "draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.org" <draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.org>, "'idr@ietf. org'" <idr@ietf.org>
Thread-Topic: [Idr] RtgDir review: draft-ietf-idr-bgp-ls-node-admin-tag-extension-01 - WG LC extended (7/15-7/22) 
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From: Jeffrey Haas <jhaas@pfrc.org>
To: Greg Mirsky <gregimirsky@gmail.com>
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Subject: Re: [RTG-DIR] Rtgdir early review of draft-ietf-mpls-bfd-directed-07
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Greg,


On Wed, Jul 12, 2017 at 07:19:04PM -0700, Greg Mirsky wrote:
> GIM>> I disagree with your conclusion that  the draft does not include
> mechanism to switch the reverse path of the BFD session in Up state.
> Firstly, the BFD Reverse Path TLV MAY be included in LSP Ping at any moment
> in time, not only when bootstrapping BFD session. Secondly, the draft
> states that if BFD Reverse Path TLV contains none sub-TLVs, then the
> reverse path MUST be switched to IP network, which is the default behavior
> per RFC 5884.

I'm not sure I agree with your conclusion.  As best I'm aware,
implementations only bootstrap their sessions to start with lsping.  I don't
recall discussion about procedures for updating existing sessions.  This may
be a fault of my memory - would you clarify where you believe this is
covered in 5884?

-- Jeff


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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Mon, 17 Jul 2017 02:06:01 -0700
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To: Jeffrey Haas <jhaas@pfrc.org>
Cc: Carlos Pignataro <cpignata@cisco.com>, rtg-dir@ietf.org, "mpls@ietf.org" <mpls@ietf.org>,  draft-ietf-mpls-bfd-directed.all@ietf.org, bfd-chairs@ietf.org
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Subject: Re: [RTG-DIR] Rtgdir early review of draft-ietf-mpls-bfd-directed-07
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--001a114a7ac444d5a905547fb5b7
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Hi Jeff,
true, the RFC 5884 does not discuss handling of subsequent LSP Ping with
the same BFD Discriminator value in BFD Discriminator TLV. My reference to
RFC 5884 is to point that the default, implied path for the reverse
direction of the BFD session is over IP network and that how this draft
interprets BFD Reverse Path TLV with none- sub-TLVs included. And yes,
nodes that would support this draft MUST handle subsequent LSP Ping Echo
Request with BFD Discriminator and BFD Reverse TLVs.

Regards,
Greg

On Mon, Jul 17, 2017 at 2:04 AM, Jeffrey Haas <jhaas@pfrc.org> wrote:

> Greg,
>
>
> On Wed, Jul 12, 2017 at 07:19:04PM -0700, Greg Mirsky wrote:
> > GIM>> I disagree with your conclusion that  the draft does not include
> > mechanism to switch the reverse path of the BFD session in Up state.
> > Firstly, the BFD Reverse Path TLV MAY be included in LSP Ping at any
> moment
> > in time, not only when bootstrapping BFD session. Secondly, the draft
> > states that if BFD Reverse Path TLV contains none sub-TLVs, then the
> > reverse path MUST be switched to IP network, which is the default
> behavior
> > per RFC 5884.
>
> I'm not sure I agree with your conclusion.  As best I'm aware,
> implementations only bootstrap their sessions to start with lsping.  I
> don't
> recall discussion about procedures for updating existing sessions.  This
> may
> be a fault of my memory - would you clarify where you believe this is
> covered in 5884?
>
> -- Jeff
>

--001a114a7ac444d5a905547fb5b7
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<div dir=3D"ltr">Hi Jeff,<div>true, the RFC 5884 does not discuss handling =
of subsequent LSP Ping with the same BFD Discriminator value in BFD Discrim=
inator TLV. My reference to RFC 5884 is to point that the default, implied =
path for the reverse direction of the BFD session is over IP network and th=
at how this draft interprets BFD Reverse Path TLV with none- sub-TLVs inclu=
ded. And yes, nodes that would support this draft MUST handle subsequent LS=
P Ping Echo Request with BFD Discriminator and BFD Reverse TLVs.</div><div>=
<br></div><div>Regards,</div><div>Greg</div></div><div class=3D"gmail_extra=
"><br><div class=3D"gmail_quote">On Mon, Jul 17, 2017 at 2:04 AM, Jeffrey H=
aas <span dir=3D"ltr">&lt;<a href=3D"mailto:jhaas@pfrc.org" target=3D"_blan=
k">jhaas@pfrc.org</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote=
" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">G=
reg,<br>
<span class=3D""><br>
<br>
On Wed, Jul 12, 2017 at 07:19:04PM -0700, Greg Mirsky wrote:<br>
&gt; GIM&gt;&gt; I disagree with your conclusion that=C2=A0 the draft does =
not include<br>
&gt; mechanism to switch the reverse path of the BFD session in Up state.<b=
r>
&gt; Firstly, the BFD Reverse Path TLV MAY be included in LSP Ping at any m=
oment<br>
&gt; in time, not only when bootstrapping BFD session. Secondly, the draft<=
br>
&gt; states that if BFD Reverse Path TLV contains none sub-TLVs, then the<b=
r>
&gt; reverse path MUST be switched to IP network, which is the default beha=
vior<br>
&gt; per RFC 5884.<br>
<br>
</span>I&#39;m not sure I agree with your conclusion.=C2=A0 As best I&#39;m=
 aware,<br>
implementations only bootstrap their sessions to start with lsping.=C2=A0 I=
 don&#39;t<br>
recall discussion about procedures for updating existing sessions.=C2=A0 Th=
is may<br>
be a fault of my memory - would you clarify where you believe this is<br>
covered in 5884?<br>
<br>
-- Jeff<br>
</blockquote></div><br></div>

--001a114a7ac444d5a905547fb5b7--


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To: Greg Mirsky <gregimirsky@gmail.com>
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On Mon, Jul 17, 2017 at 02:06:01AM -0700, Greg Mirsky wrote:
> true, the RFC 5884 does not discuss handling of subsequent LSP Ping with
> the same BFD Discriminator value in BFD Discriminator TLV. My reference to
> RFC 5884 is to point that the default, implied path for the reverse
> direction of the BFD session is over IP network and that how this draft
> interprets BFD Reverse Path TLV with none- sub-TLVs included. And yes,
> nodes that would support this draft MUST handle subsequent LSP Ping Echo
> Request with BFD Discriminator and BFD Reverse TLVs.
> 

I don't believe the procedure updating 5884 to change existing session
properties is called out in the -directed document.  I don't have a strong
opinion about the use case of whether such updates are desired or not.
That's a decision for the MPLS WG.  However, I do think such procedure needs
to be clear if it's desired.  This is part of Carlos' point.

-- Jeff


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Hi Jeff,
thank you for pointing that the use of LSP Ping to update the existing BFD
session should be explicitly documented in the draft. I agree that this is
valid request and, if the MPLS WG agrees, will add it in the next version
along what I've outlined in our discussion.

Regards,
Greg

On Mon, Jul 17, 2017 at 2:23 AM, Jeffrey Haas <jhaas@pfrc.org> wrote:

> On Mon, Jul 17, 2017 at 02:06:01AM -0700, Greg Mirsky wrote:
> > true, the RFC 5884 does not discuss handling of subsequent LSP Ping with
> > the same BFD Discriminator value in BFD Discriminator TLV. My reference
> to
> > RFC 5884 is to point that the default, implied path for the reverse
> > direction of the BFD session is over IP network and that how this draft
> > interprets BFD Reverse Path TLV with none- sub-TLVs included. And yes,
> > nodes that would support this draft MUST handle subsequent LSP Ping Echo
> > Request with BFD Discriminator and BFD Reverse TLVs.
> >
>
> I don't believe the procedure updating 5884 to change existing session
> properties is called out in the -directed document.  I don't have a strong
> opinion about the use case of whether such updates are desired or not.
> That's a decision for the MPLS WG.  However, I do think such procedure
> needs
> to be clear if it's desired.  This is part of Carlos' point.
>
> -- Jeff
>

--001a1145d2708da00205547ff756
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<div dir=3D"ltr">Hi Jeff,<div>thank you for pointing that the use of LSP Pi=
ng to update the existing BFD session should be explicitly documented in th=
e draft. I agree that this is valid request and, if the MPLS WG agrees, wil=
l add it in the next version along what I&#39;ve outlined in our discussion=
.</div><div><br></div><div>Regards,</div><div>Greg</div></div><div class=3D=
"gmail_extra"><br><div class=3D"gmail_quote">On Mon, Jul 17, 2017 at 2:23 A=
M, Jeffrey Haas <span dir=3D"ltr">&lt;<a href=3D"mailto:jhaas@pfrc.org" tar=
get=3D"_blank">jhaas@pfrc.org</a>&gt;</span> wrote:<br><blockquote class=3D=
"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding=
-left:1ex"><span class=3D"">On Mon, Jul 17, 2017 at 02:06:01AM -0700, Greg =
Mirsky wrote:<br>
&gt; true, the RFC 5884 does not discuss handling of subsequent LSP Ping wi=
th<br>
&gt; the same BFD Discriminator value in BFD Discriminator TLV. My referenc=
e to<br>
&gt; RFC 5884 is to point that the default, implied path for the reverse<br=
>
&gt; direction of the BFD session is over IP network and that how this draf=
t<br>
&gt; interprets BFD Reverse Path TLV with none- sub-TLVs included. And yes,=
<br>
&gt; nodes that would support this draft MUST handle subsequent LSP Ping Ec=
ho<br>
&gt; Request with BFD Discriminator and BFD Reverse TLVs.<br>
&gt;<br>
<br>
</span>I don&#39;t believe the procedure updating 5884 to change existing s=
ession<br>
properties is called out in the -directed document.=C2=A0 I don&#39;t have =
a strong<br>
opinion about the use case of whether such updates are desired or not.<br>
That&#39;s a decision for the MPLS WG.=C2=A0 However, I do think such proce=
dure needs<br>
to be clear if it&#39;s desired.=C2=A0 This is part of Carlos&#39; point.<b=
r>
<br>
-- Jeff<br>
</blockquote></div><br></div>

--001a1145d2708da00205547ff756--


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From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
To: Jeffrey Haas <jhaas@pfrc.org>
CC: Greg Mirsky <gregimirsky@gmail.com>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "mpls@ietf.org" <mpls@ietf.org>, "draft-ietf-mpls-bfd-directed.all@ietf.org" <draft-ietf-mpls-bfd-directed.all@ietf.org>, "bfd-chairs@ietf.org" <bfd-chairs@ietf.org>
Thread-Topic: Rtgdir early review of draft-ietf-mpls-bfd-directed-07
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References: <149978159930.12344.18347332855391607627@ietfa.amsl.com> <CA+RyBmUrraRZeO3mwmurfaVwZva22J=3YNOTSN77utjhZc5Osw@mail.gmail.com> <20170717090400.GC24942@pfrc.org> <CA+RyBmXZmb0tXx2Up=uyDAv2-i2sbPzHfSQ4K-ov6+K6WQy4og@mail.gmail.com>, <20170717092332.GD24942@pfrc.org>
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Subject: Re: [RTG-DIR] Rtgdir early review of draft-ietf-mpls-bfd-directed-07
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> On Jul 17, 2017, at 11:13 AM, Jeffrey Haas <jhaas@pfrc.org> wrote:
>=20
>> On Mon, Jul 17, 2017 at 02:06:01AM -0700, Greg Mirsky wrote:
>> true, the RFC 5884 does not discuss handling of subsequent LSP Ping with
>> the same BFD Discriminator value in BFD Discriminator TLV. My reference =
to
>> RFC 5884 is to point that the default, implied path for the reverse
>> direction of the BFD session is over IP network and that how this draft
>> interprets BFD Reverse Path TLV with none- sub-TLVs included.

Greg, I cannot find any default behavior specified in RFC 5884. Section 7, =
paragraphs 6 and 7 talk about and either/or.=20

>> And yes,
>> nodes that would support this draft MUST handle subsequent LSP Ping Echo
>> Request with BFD Discriminator and BFD Reverse TLVs.
>>=20

This, along with its associated "how" is missing from the draft.=20

>=20
> I don't believe the procedure updating 5884 to change existing session
> properties is called out in the -directed document.  I don't have a stron=
g
> opinion about the use case of whether such updates are desired or not.
> That's a decision for the MPLS WG.  However, I do think such procedure ne=
eds
> to be clear if it's desired.  This is part of Carlos' point.
>=20

Jeff, indeed.=20

> -- Jeff

Thanks!

-- Carlos. =


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From: Michael Richardson <mcr+ietf@sandelman.ca>
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Subject: [RTG-DIR] RtgDir Early review: draft-ietf-i2rs-yang-l3-topology
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--=-=-=
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Hello

I have been selected to do a routing directorate =E2=80=9Cearly=E2=80=9D re=
view of this draft.=20
https://tools.ietf.org/html/draft-ietf-i2rs-yang-l3-topology-10

The routing directorate will, on request from the working group chair,
perform an =E2=80=9Cearly=E2=80=9D 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=
=E2=80=99s
lifetime as a working group document. The purpose of the early review depen=
ds
on the stage that the document has reached.

I believe that this is case 3, the document is neither recently adopted
nor is it in WGLC.   The request is for a sanity check.

For more information about the Routing Directorate, please see
=E2=80=8Bhttp://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir=20

Document: draft-ietf-i2rs-yang-l3-topology
Reviewer: Michael Richardson
Review Date: 2017-07-18
Intended Status: Standards Track

Summary:=20

I have some minor concerns about this document that I think should be
resolved before it is submitted to the IESG.

Comments:

I found the document clear and well written.
You told me at the beginning that:
   For this purpose,
   example models are introduced that cover IS-IS [RFC1195] and OSPF
   [RFC2328].

Yet I still felt sad when I got to spot where it said:
   Accordingly, the module is not delimited with
   CODE BEGINS and CODE ENDS

I think that the point of the OSPF and ISIS examples was to show, via a kind
of running-code of YANG, that the specification was complete enough that
it could be used.   Maybe this could be clarified better, the examples occu=
py
a large portion of the document.   I'm not sure so much of the document
should be devoted to non-normative examples.

I don't think I agree with ommitting the CODE BEGINS, because someone readi=
ng
this might well want to run the examples through their yang validator.
=20=20=20
It was nice to have the mini-tutorial on YANG, but I don't think it needed
to be repeated.

I found parts of the YANG to be silly, such as:

        leaf-list flag {
           type node-flag-type;
           description
             "Node flags";
         }

Does YANG require that actually have to have a description?
It is meaningless as above.  What are node flags?   I suggest that the
description should be far more useful.  Consider someone seeing the data
decoded into a database, but has this description.

Another example of useless descriptions:
        case asbr {
           leaf asbr {
             type empty;
             description
               "The node is ASBR";
           }

okay, fair enough, it is an example, so don't work too hard here.

As examples, I thought that maybe I'd see this module instantiated into
JSON or XML and to see an example of a data set that describes a real-life
router's interfaces.  I did not see such a thing.
Perhaps there are feelings about whether or not a YANG model should include
concrete code or not, I'm not sure.

I didn't understand why:
  Appendix A.  Companion YANG model for non-NMDA compliant implementations
was included.  Probably I don't know enough about NMDA.

Nits:

I found no trivial nits.

=2D-=20
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -=3D IPv6 IoT consulting =3D-




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From nobody Wed Jul 19 01:56:48 2017
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From: "Susan Hares" <shares@ndzh.com>
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Subject: Re: [RTG-DIR] RtgDir Early review: draft-ietf-i2rs-yang-l3-topology
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Michael:=20

Thank you for the review.  The authors will be discussing this with you =
and on the list.=20

One challenge is that your point of view on IS-IS and OSPF models was =
countered by the Yang doctor's review.  The YANG Doctor's early review =
removed the CODE-BEGINS/CODE-ENDS.   However, you and the YANG Doctors =
both have good points.   As chair, I'm going to have to the I2RS AD and =
the OPS Advice on what to do.=20

Sue=20

-----Original Message-----
From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Michael =
Richardson
Sent: Wednesday, July 19, 2017 4:45 AM
To: l2rs-wg-chairs@ietf.org; draft-ietf-i2rs-yang-l3-topology@ietf.org
Cc: rtg-dir@ietf.org; l2rs@ietf.org
Subject: [RTG-DIR] RtgDir Early review: draft-ietf-i2rs-yang-l3-topology


Hello

I have been selected to do a routing directorate =E2=80=9Cearly=E2=80=9D =
review of this draft.=20
https://tools.ietf.org/html/draft-ietf-i2rs-yang-l3-topology-10

The routing directorate will, on request from the working group chair, =
perform an =E2=80=9Cearly=E2=80=9D 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=E2=80=99s lifetime as a working group =
document. The purpose of the early review depends on the stage that the =
document has reached.

I believe that this is case 3, the document is neither recently adopted
nor is it in WGLC.   The request is for a sanity check.

For more information about the Routing Directorate, please see =
=E2=80=8Bhttp://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir=20

Document: draft-ietf-i2rs-yang-l3-topology
Reviewer: Michael Richardson
Review Date: 2017-07-18
Intended Status: Standards Track

Summary:=20

I have some minor concerns about this document that I think should be =
resolved before it is submitted to the IESG.

Comments:

I found the document clear and well written.
You told me at the beginning that:
   For this purpose,
   example models are introduced that cover IS-IS [RFC1195] and OSPF
   [RFC2328].

Yet I still felt sad when I got to spot where it said:
   Accordingly, the module is not delimited with
   CODE BEGINS and CODE ENDS

I think that the point of the OSPF and ISIS examples was to show, via a =
kind of running-code of YANG, that the specification was complete enough =
that
it could be used.   Maybe this could be clarified better, the examples =
occupy
a large portion of the document.   I'm not sure so much of the document
should be devoted to non-normative examples.

I don't think I agree with ommitting the CODE BEGINS, because someone =
reading this might well want to run the examples through their yang =
validator.
  =20
It was nice to have the mini-tutorial on YANG, but I don't think it =
needed to be repeated.

I found parts of the YANG to be silly, such as:

        leaf-list flag {
           type node-flag-type;
           description
             "Node flags";
         }

Does YANG require that actually have to have a description?
It is meaningless as above.  What are node flags?   I suggest that the
description should be far more useful.  Consider someone seeing the data =
decoded into a database, but has this description.

Another example of useless descriptions:
        case asbr {
           leaf asbr {
             type empty;
             description
               "The node is ASBR";
           }

okay, fair enough, it is an example, so don't work too hard here.

As examples, I thought that maybe I'd see this module instantiated into =
JSON or XML and to see an example of a data set that describes a =
real-life router's interfaces.  I did not see such a thing.
Perhaps there are feelings about whether or not a YANG model should =
include concrete code or not, I'm not sure.

I didn't understand why:
  Appendix A.  Companion YANG model for non-NMDA compliant =
implementations was included.  Probably I don't know enough about NMDA.

Nits:

I found no trivial nits.

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works  =
-=3D IPv6 IoT consulting =3D-





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--=-=-=
Content-Type: text/plain
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Susan Hares <shares@ndzh.com> wrote:
    > One challenge is that your point of view on IS-IS and OSPF models was
    > countered by the Yang doctor's review.  The YANG Doctor's early review
    > removed the CODE-BEGINS/CODE-ENDS.  However, you and the YANG Doctors
    > both have good points.  As chair, I'm going to have to the I2RS AD and
    > the OPS Advice on what to do.

Perhaps EXAMPLE-CODE-BEGINS.  That way it can still be extracted from the x=
ml
via script, but the automatic draft yang validator won't see it.



=2D-=20
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -=3D IPv6 IoT consulting =3D-




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From nobody Wed Jul 19 05:19:30 2017
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That' a good idea. 

Sue 

-----Original Message-----
From: Michael Richardson [mailto:mcr+ietf@sandelman.ca] 
Sent: Wednesday, July 19, 2017 8:13 AM
To: Susan Hares
Cc: l2rs-wg-chairs@ietf.org; draft-ietf-i2rs-yang-l3-topology@ietf.org;
rtg-dir@ietf.org; l2rs@ietf.org
Subject: Re: [RTG-DIR] RtgDir Early review: draft-ietf-i2rs-yang-l3-topology

Susan Hares <shares@ndzh.com> wrote:
    > One challenge is that your point of view on IS-IS and OSPF models was
    > countered by the Yang doctor's review.  The YANG Doctor's early review
    > removed the CODE-BEGINS/CODE-ENDS.  However, you and the YANG Doctors
    > both have good points.  As chair, I'm going to have to the I2RS AD and
    > the OPS Advice on what to do.

Perhaps EXAMPLE-CODE-BEGINS.  That way it can still be extracted from the
xml via script, but the automatic draft yang validator won't see it.



--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works  -=
IPv6 IoT consulting =-





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--=-=-=
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BTW: I complained about expand-draft-ietf-i2rs-yang-l3-topology@virtual.iet=
f.org
     bouncing to ietf-action.

=2D-=20
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -=3D IPv6 IoT consulting =3D-




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I'll ask why this happened.  Thank you for the note. 

Sue Hares 

-----Original Message-----
From: Michael Richardson [mailto:mcr+ietf@sandelman.ca] 
Sent: Wednesday, July 19, 2017 12:52 PM
To: Susan Hares
Cc: l2rs-wg-chairs@ietf.org; draft-ietf-i2rs-yang-l3-topology@ietf.org;
rtg-dir@ietf.org; l2rs@ietf.org
Subject: Subject: [www.ietf.org/rt #176329] AutoReply: bounce for
expand-draft-ietf-i2rs-yang-l3-topology@virtual.ietf.org


BTW: I complained about
expand-draft-ietf-i2rs-yang-l3-topology@virtual.ietf.org
     bouncing to ietf-action.

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works  -=
IPv6 IoT consulting =-





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From: Jonathan Hardwick <Jonathan.Hardwick@metaswitch.com>
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Subject: [RTG-DIR] Routing area draft minutes available
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The draft minutes for the RTGAREA meeting at IETF 99 are now available.  Pl=
ease let me know if you have any comments.
https://www.ietf.org/proceedings/99/minutes/minutes-99-rtgarea-00.txt

Best regards
Jon


From nobody Fri Jul 21 03:54:50 2017
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From: Alia Atlas <akatlas@gmail.com>
Date: Fri, 21 Jul 2017 06:54:38 -0400
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--f403045f4d1a0d5e980554d1b184
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Jon,

Thank you very much for timely minutes.

Regards,
Alia

On Thu, Jul 20, 2017 at 5:17 AM, Jonathan Hardwick <
Jonathan.Hardwick@metaswitch.com> wrote:

> The draft minutes for the RTGAREA meeting at IETF 99 are now available.
> Please let me know if you have any comments.
> https://www.ietf.org/proceedings/99/minutes/minutes-99-rtgarea-00.txt
>
> Best regards
> Jon
>
>

--f403045f4d1a0d5e980554d1b184
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<div dir=3D"ltr">Jon,<div><br></div><div>Thank you very much for timely min=
utes.</div><div><br></div><div>Regards,</div><div>Alia</div></div><div clas=
s=3D"gmail_extra"><br><div class=3D"gmail_quote">On Thu, Jul 20, 2017 at 5:=
17 AM, Jonathan Hardwick <span dir=3D"ltr">&lt;<a href=3D"mailto:Jonathan.H=
ardwick@metaswitch.com" target=3D"_blank">Jonathan.Hardwick@metaswitch.com<=
/a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:=
0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">The draft minutes f=
or the RTGAREA meeting at IETF 99 are now available.=C2=A0 Please let me kn=
ow if you have any comments.<br>
<a href=3D"https://www.ietf.org/proceedings/99/minutes/minutes-99-rtgarea-0=
0.txt" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/<wbr>proce=
edings/99/minutes/<wbr>minutes-99-rtgarea-00.txt</a><br>
<br>
Best regards<br>
Jon<br>
<br>
</blockquote></div><br></div>

--f403045f4d1a0d5e980554d1b184--


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+1 =E2=80=93 I really appreciate all your hard work on RTG-DIR=20

=20

Sue=20

=20

From: Alia Atlas [mailto:akatlas@gmail.com]=20
Sent: Friday, July 21, 2017 6:55 AM
To: Jonathan Hardwick
Cc: routing-discussion@ietf.org; rtg-chairs@ietf.org; rtg-dir@ietf.org; =
rtg-ads@ietf.org
Subject: Re: Routing area draft minutes available

=20

Jon,

=20

Thank you very much for timely minutes.

=20

Regards,

Alia

=20

On Thu, Jul 20, 2017 at 5:17 AM, Jonathan Hardwick =
<Jonathan.Hardwick@metaswitch.com> wrote:

The draft minutes for the RTGAREA meeting at IETF 99 are now available.  =
Please let me know if you have any comments.
https://www.ietf.org/proceedings/99/minutes/minutes-99-rtgarea-00.txt

Best regards
Jon

=20


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<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>+1 =E2=80=93 I really appreciate all your hard work on RTG-DIR =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Alia Atlas [mailto:akatlas@gmail.com] <br><b>Sent:</b> Friday, July 21, =
2017 6:55 AM<br><b>To:</b> Jonathan Hardwick<br><b>Cc:</b> =
routing-discussion@ietf.org; rtg-chairs@ietf.org; rtg-dir@ietf.org; =
rtg-ads@ietf.org<br><b>Subject:</b> Re: Routing area draft minutes =
available<o:p></o:p></span></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p =
class=3DMsoNormal>Jon,<o:p></o:p></p><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>Thank you very much for timely =
minutes.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>Regards,<o:p></o:p></p></div><div><p =
class=3DMsoNormal>Alia<o:p></o:p></p></div></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal>On Thu, =
Jul 20, 2017 at 5:17 AM, Jonathan Hardwick &lt;<a =
href=3D"mailto:Jonathan.Hardwick@metaswitch.com" =
target=3D"_blank">Jonathan.Hardwick@metaswitch.com</a>&gt; =
wrote:<o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>The draft minutes for the RTGAREA meeting =
at IETF 99 are now available.&nbsp; Please let me know if you have any =
comments.<br><a =
href=3D"https://www.ietf.org/proceedings/99/minutes/minutes-99-rtgarea-00=
.txt" =
target=3D"_blank">https://www.ietf.org/proceedings/99/minutes/minutes-99-=
rtgarea-00.txt</a><br><br>Best regards<br>Jon<o:p></o:p></p></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></div></body></html>
------=_NextPart_000_000F_01D30297.DB375470--


From nobody Mon Jul 24 16:14:26 2017
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From: Ines Robles <mariainesrobles@googlemail.com>
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Subject: [RTG-DIR] Rtgdir last call review of draft-ietf-i2rs-yang-network-topo-14
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Reviewer: Ines Robles
Review result: Has Issues

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-i2rs-yang-network-topo-14.txt
Reviewer: Ines Robles
Review Date: 07-25-2017
Intended status: Standards Track

Summary:
I have some minor concerns about this document that I think should be resolved
before publication.

Comments:

I believe the draft is technically good. This document is well written and
clear to understand. The figures are clear and helpful.

Major Issues:

No major issues found.

Minor Issues:

Since this document specifies a data model, I would include some text related
to the Information Model [RFC 3444]. How would it be in this context?

1- Section 1

  1.a following Figure 1 (Page 4):

    I would add in the figure the corresponding section that explain the
    module. e.g. Abstract Network Model, I would add in the figure "Abstract
    (base) Network Model" and "section 4.1". The same for "Abstract Topology
    Model", should it be section 4.2?

  1.b -following Figure 2 (Page 5):

      1.b.1- " X1 and X2 - mapping onto... ",  I think it would be "X1 and X3
      mapping onto..."

      1.b.2- " a single L3 network element", I would add in this case (Y2) "a
      single L3 (Y2) network element", the same for "The figure shows a single
      "L3" network element mapped onto multiple "Optical" network elements.", I
      would add "The figure shows a single "L3" network element (Y2) mapped
      onto multiple "Optical" network elements [Z] and [Z1]."

      1.b.3- I would expand ROADMs --> Reconfigurable Optical Add/Drop
      Multiplexers (ROADMs)

2- Section 2:

  2.1- I would add a reference to RFC 6020, since the document uses terminology
  e.g container, augment, etc. which are defined in 6020. Even if this RFC is
  mentioned in the normative reference, still I would add it here as well.

3- Section 3:

  3.1-  ReST is mentioned here but not in the rest of the draft, is this
  correct?

Nits:

1- Pag. 18: is that correct?: "(a string is a string is a string)"

2- pag. 34: I would expand NMS -> NMS (Network Management System)

3- pag. 34: I would add a definition about TE Topology : "TE-Topology: The TE
Topology is a schematic arrangement of TE nodes
   and TE links in a given TED. It forms the basis for a graph suitable
   for TE path computations."
   [https://tools.ietf.org/html/draft-ietf-teas-yang-te-topo-12]

4- pag. 34: topoogical -> topological

5- pag 35: "uber-network device" -> over-network device?

Thanks,

Ines.



From nobody Tue Jul 25 06:31:43 2017
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References: <a60975bbd3774d4cb4041ef0d005f642@XCH-ALN-001.cisco.com> <CAEFuwkgtYbvHQdRUJb3jmFgq3+dtfJ+ERdpgB8aeKXryVBYYTA@mail.gmail.com> <CAEFuwki9KYZuNgW6u7LYU4cAGY0XCgNZ_nY3xhkmxB_weM_0fA@mail.gmail.com> <ed8ccfc11e8a4951a2bf67d8ad34e16b@XCH-ALN-001.cisco.com> <CAEFuwkjAe1JA-hqLbnrXN=Q_fPYO=Q=7Pn=jRXGWQ0iC31EjEg@mail.gmail.com>
From: Pushpasis Sarkar <pushpasis.ietf@gmail.com>
Date: Tue, 25 Jul 2017 06:31:30 -0700
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To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
Cc: "idr-ads@ietf.org" <idr-ads@ietf.org>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>,  "draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.org" <draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.org>,  "idr@ietf. org" <idr@ietf.org>
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Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-bgp-ls-node-admin-tag-extension-01
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--94eb2c07d10c6e277c0555245917
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Hi Les,

Thank you once again for helping me out with all the review comments.. I
have addressed all your comments and uploaded version 02. Please let me
know if you need any more issues to take care of.

Thanks and Regards,
-Pushpasis


On Thu, Jul 13, 2017 at 5:24 PM, Pushpasis Sarkar <pushpasis.ietf@gmail.com=
>
wrote:

> Hi Les,
>
> Sorry once again for the late response. Please find comments inline...
>
>
> On Sat, Jul 8, 2017 at 1:42 PM, Les Ginsberg (ginsberg) <
> ginsberg@cisco.com> wrote:
>
>> Pushpassis =E2=80=93
>>
>>
>>
>> Sorry for the delay in responding.
>>
>> You have not addressed all of the editorial comments I provided =E2=80=
=93 please
>> do a second pass.
>>
> [Pushpasis] I did a second pass.. But I could not locate which one(s) I
> missed out. It will be great if you list them out for me. The htmlized di=
ff
> you attached earlier does not exactly highlight the diffs.. :( Request yo=
ur
> help here...
>
>
>>
>>
>> Also, there is one substantive issue which you did not address:
>>
>>
>>
>> *<snip>*
>>
>> *Section 3.1 Last paragraph*
>>
>>
>>
>> *I recognize this statement regarding policy being used to filter what i=
s*
>>
>> *advertised is consistent with RFC 7752. But it would also be good to
>> include*
>>
>> *a statement like:*
>>
>>
>>
>> *"Definition of such a policy is outside the scope of this document."*
>>
>> *<end snip>*
>>
>>
>>
>> If you have a concern with what I proposed please let me know what it is=
.
>>
> [Pushpasis] I will be very happy to add the statement.  Thanks a lot for
> the suggestion.
>
> Thanks and Regards,
> -Pushpasis
>
>>
>>
>> Thanx.
>>
>>
>>
>>    Les
>>
>>
>>
>>
>>
>>
>>
>> *From:* Pushpasis Sarkar [mailto:pushpasis.ietf@gmail.com]
>> *Sent:* Tuesday, July 04, 2017 8:58 PM
>> *To:* Les Ginsberg (ginsberg)
>> *Cc:* idr-ads@ietf.org; rtg-dir@ietf.org; draft-ietf-idr-bgp-ls-node-adm
>> in-tag-extension.all@ietf.org; idr@ietf. org
>> *Subject:* Re: RtgDir review: draft-ietf-idr-bgp-ls-node-adm
>> in-tag-extension-01
>>
>>
>>
>> Hi Les,
>>
>>
>>
>> Thank you once more for the review comments. And sorry for the late
>> reply. I have addressed all your comments in the attached draft. Please
>> review the same let me know if you have any more comments. If not I will
>> upload the draft soon.
>>
>>
>>
>> Thanks and regards,
>>
>> -Pushpasis
>>
>>
>>
>> On Wed, Jun 28, 2017 at 10:26 PM, Pushpasis Sarkar <
>> pushpasis.ietf@gmail.com> wrote:
>>
>> Hi Les,
>>
>>
>>
>> Thanks a lot for the review comments. I will reply back addressing your
>> comments soon.
>>
>>
>>
>> Thanks and regards
>>
>> -Pushpasis
>>
>>
>>
>> On Tue, Jun 27, 2017 at 11:37 PM, Les Ginsberg (ginsberg) <
>> ginsberg@cisco.com> wrote:
>>
>> 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 sometime=
s
>> on special request. The purpose of the review is to provide assistance t=
o
>> the Routing ADs. For more information about the Routing Directorate, ple=
ase
>> 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
>> comments that you receive, and strive to resolve them through discussion=
 or
>> by updating the draft.
>>
>>
>> Document: draft-ietf-idr-bgp-ls-node-admin-tag-extension-01
>> Reviewer: Les Ginsberg
>> Review Date: June 27, 2017
>> Intended Status: Standards
>>
>> Summary:  The document is of modest scope - covering definition of BGP-L=
S
>> codepoints for a relatively new IGP attribute (Node Admin Tags).
>> While I found nothing which I would consider a major issue, there are a
>> number
>> of places where the text lacks clarity. I think addressing these areas
>> would
>> greatly improve the quality of the draft.
>>
>>
>> Major Issues: None
>>
>> Minor Issues:
>>
>> Section 1 Introduction
>>
>> The acronym LSDB is not defined.
>>
>> Figure 1
>>
>> I have a personal dislike for duplicating text/pictures from another
>> spec when that spec could simply be referenced. There are only two
>> possible outcomes:
>>
>> 1)The duplicated text is redundant (best case)
>> 2)The text differs somewhat from the original leading to possible
>> unintentional misinterpretations.
>>
>> Suit yourself on this comment - but I would prefer the duplication be
>> omitted.
>>
>> Section 2 First paragraph
>>
>> You refer to "sub-TLV" but that reference is unclear and ambiguous.
>> IS-IS uses a sub-TLV of Router Capability to advertise tags, but OSPF
>> uses a TLV of Router Info LSA.
>> What seems most relevant here is that you are defining a new Attribute
>> TLV for Node NLRI.
>>
>> Section 3 Second paragraph
>>
>> I do not know what the paragraph is trying to say, nor do
>> I know what the "TBD" in columns 4 and 5 in the following Table 1 is
>> meant to reference. If you are simply trying to describe the source
>> of the info advertised by the new BGP-LS Node attribute then you should
>> rewrite the above paragraph and in the figure below show:
>>
>> IS-IS 242/21
>> OSPF RI-LSA/10
>>
>> Section 3.1
>>
>> A description of where in the Node NLRI the area/level information can b=
e
>> found
>> (from RFC 7752) would be helpful.
>>
>>
>> Section 3.1 Penultimate Paragraph
>>
>> As TAGs with "global" scope will be advertised by the IGP multiple
>> times (once per area/level) I assume you are asking BGP-LS advertisement=
s
>> to reduce these multiple occurrences to a single occurrence? More
>> explicit language on that point would be helpful.
>>
>> Section 3.1 Last paragraph
>>
>> I recognize this statement regarding policy being used to filter what is
>> advertised is consistent with RFC 7752. But it would also be good to
>> include
>> a statement like:
>>
>> "Definition of such a policy is outside the scope of this document."
>>
>> Nits: Please see attached diff file with some editorial corrections.
>>
>>
>>
>>
>>
>
>

--94eb2c07d10c6e277c0555245917
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Les,<div><br></div><div>Thank you once again for helpin=
g me out with all the review comments.. I have addressed all your comments =
and uploaded version 02. Please let me know if you need any more issues to =
take care of.</div><div><br></div><div>Thanks and Regards,</div><div>-Pushp=
asis</div><div><br></div></div><div class=3D"gmail_extra"><br><div class=3D=
"gmail_quote">On Thu, Jul 13, 2017 at 5:24 PM, Pushpasis Sarkar <span dir=
=3D"ltr">&lt;<a href=3D"mailto:pushpasis.ietf@gmail.com" target=3D"_blank">=
pushpasis.ietf@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmai=
l_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left=
:1ex"><div dir=3D"ltr">Hi Les,<div><br></div><div>Sorry once again for the =
late response. Please find comments inline...</div><div><br></div><div clas=
s=3D"gmail_extra"><br><div class=3D"gmail_quote"><span class=3D"">On Sat, J=
ul 8, 2017 at 1:42 PM, Les Ginsberg (ginsberg) <span dir=3D"ltr">&lt;<a hre=
f=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@cisco.com</a>&gt=
;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_6054413524821224818m_1154821204407878896WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Pushpassis =E2=80=93<u></=
u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Sorry for the delay in re=
sponding.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">You have not addressed al=
l of the editorial comments I provided =E2=80=93 please do a second pass.</=
span></p></div></div></blockquote></span><div>[Pushpasis] I did a second pa=
ss.. But I could not locate which one(s) I missed out. It will be great if =
you list them out for me. The htmlized diff you attached earlier does not e=
xactly highlight the diffs.. :( Request your help here...=C2=A0</div><span =
class=3D""><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"marg=
in:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"EN-=
US" link=3D"blue" vlink=3D"purple"><div class=3D"m_6054413524821224818m_115=
4821204407878896WordSection1"><p class=3D"MsoNormal"><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Also, there is one substa=
ntive issue which you did not address:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d">&lt;snip&gt;<u></u><u></u></span></i></p><span>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d">Section 3.1 Last paragraph<u></u><u></u></span></i></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d"><u></u>=C2=A0<u></u></span></i></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d">I recognize this statement regarding policy being used to filter what =
is<u></u><u></u></span></i></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d">advertised is consistent with RFC 7752. But it would also be good to i=
nclude<u></u><u></u></span></i></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d">a statement like:<u></u><u></u></span></i></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d"><u></u>=C2=A0<u></u></span></i></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d">&quot;Definition of such a policy is outside the scope of this documen=
t.&quot;<u></u><u></u></span></i></p>
</span><p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"=
font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;col=
or:#1f497d">&lt;end snip&gt;<u></u><u></u></span></i></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><i><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f4=
97d"><u></u>=C2=A0<u></u></span></i></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">If you have a concern wit=
h what I proposed please let me know what it is.</span></p></div></div></bl=
ockquote></span><div>[Pushpasis] I will be very happy to add the statement.=
=C2=A0 Thanks a lot for the suggestion.</div><div><br></div><div>Thanks and=
 Regards,</div><div>-Pushpasis</div><div><div class=3D"h5"><blockquote clas=
s=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pad=
ding-left:1ex"><div lang=3D"EN-US" link=3D"blue" vlink=3D"purple"><div clas=
s=3D"m_6054413524821224818m_1154821204407878896WordSection1"><p class=3D"Ms=
oNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&q=
uot;sans-serif&quot;;color:#1f497d">
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">Thanx.<u></u><u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d">=C2=A0=C2=A0 Les<u></u><u=
></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Pushpasi=
s Sarkar [mailto:<a href=3D"mailto:pushpasis.ietf@gmail.com" target=3D"_bla=
nk">pushpasis.ietf@gmail.c<wbr>om</a>]
<br>
<b>Sent:</b> Tuesday, July 04, 2017 8:58 PM<br>
<b>To:</b> Les Ginsberg (ginsberg)<br>
<b>Cc:</b> <a href=3D"mailto:idr-ads@ietf.org" target=3D"_blank">idr-ads@ie=
tf.org</a>; <a href=3D"mailto:rtg-dir@ietf.org" target=3D"_blank">rtg-dir@i=
etf.org</a>; <a href=3D"mailto:draft-ietf-idr-bgp-ls-node-admin-tag-extensi=
on.all@ietf.org" target=3D"_blank">draft-ietf-idr-bgp-ls-node-adm<wbr>in-ta=
g-extension.all@ietf.org</a>; idr@ietf. org<br>
<b>Subject:</b> Re: RtgDir review: draft-ietf-idr-bgp-ls-node-adm<wbr>in-ta=
g-extension-01<u></u><u></u></span></p>
</div>
</div><div><div class=3D"m_6054413524821224818h5">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">Hi Les,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thank you once more for the review comments. And sor=
ry for the late reply. I have addressed all your comments in the attached d=
raft. Please review the same let me know if you have any more comments. If =
not I will upload the draft soon.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks and regards,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">-Pushpasis<u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Wed, Jun 28, 2017 at 10:26 PM, Pushpasis Sarkar &=
lt;<a href=3D"mailto:pushpasis.ietf@gmail.com" target=3D"_blank">pushpasis.=
ietf@gmail.com</a>&gt; wrote:<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">Hi Les,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks a lot for the review comments. I will reply b=
ack addressing your comments soon.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks and regards<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:#888888">-Pushpasis<u></u><u></=
u></span></p>
</div>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Tue, Jun 27, 2017 at 11:37 PM, Les Ginsberg (gins=
berg) &lt;<a href=3D"mailto:ginsberg@cisco.com" target=3D"_blank">ginsberg@=
cisco.com</a>&gt; wrote:<u></u><u></u></p>
<p class=3D"MsoNormal">Hello,<br>
<br>
=C2=A0I have been selected as the Routing Directorate reviewer for this dra=
ft. The Routing Directorate seeks to review all routing or routing-related =
drafts as they pass through IETF last call and IESG review, and sometimes o=
n special request. The purpose of the
 review is to provide assistance to the Routing ADs. For more information a=
bout the Routing Directorate, please see=C2=A0
<a href=3D"http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir" target=3D"=
_blank">http://trac.tools.ietf.org/are<wbr>a/rtg/trac/wiki/RtgDir</a> .<br>
<br>
Although these comments are primarily for the use of the Routing ADs, it wo=
uld be helpful if you could consider them along with any other IETF comment=
s that you receive, and strive to resolve them through discussion or by upd=
ating the draft.<br>
<br>
<br>
Document: draft-ietf-idr-bgp-ls-node-adm<wbr>in-tag-extension-01<br>
Reviewer: Les Ginsberg<br>
Review Date: June 27, 2017<br>
Intended Status: Standards<br>
<br>
Summary:=C2=A0 The document is of modest scope - covering definition of BGP=
-LS<br>
codepoints for a relatively new IGP attribute (Node Admin Tags).<br>
While I found nothing which I would consider a major issue, there are a num=
ber<br>
of places where the text lacks clarity. I think addressing these areas woul=
d<br>
greatly improve the quality of the draft.<br>
<br>
<br>
Major Issues: None<br>
<br>
Minor Issues:<br>
<br>
Section 1 Introduction<br>
<br>
The acronym LSDB is not defined.<br>
<br>
Figure 1<br>
<br>
I have a personal dislike for duplicating text/pictures from another<br>
spec when that spec could simply be referenced. There are only two<br>
possible outcomes:<br>
<br>
1)The duplicated text is redundant (best case)<br>
2)The text differs somewhat from the original leading to possible<br>
unintentional misinterpretations.<br>
<br>
Suit yourself on this comment - but I would prefer the duplication be omitt=
ed.<br>
<br>
Section 2 First paragraph<br>
<br>
You refer to &quot;sub-TLV&quot; but that reference is unclear and ambiguou=
s.<br>
IS-IS uses a sub-TLV of Router Capability to advertise tags, but OSPF<br>
uses a TLV of Router Info LSA.<br>
What seems most relevant here is that you are defining a new Attribute<br>
TLV for Node NLRI.<br>
<br>
Section 3 Second paragraph<br>
<br>
I do not know what the paragraph is trying to say, nor do<br>
I know what the &quot;TBD&quot; in columns 4 and 5 in the following Table 1=
 is<br>
meant to reference. If you are simply trying to describe the source<br>
of the info advertised by the new BGP-LS Node attribute then you should<br>
rewrite the above paragraph and in the figure below show:<br>
<br>
IS-IS 242/21<br>
OSPF RI-LSA/10<br>
<br>
Section 3.1<br>
<br>
A description of where in the Node NLRI the area/level information can be f=
ound<br>
(from RFC 7752) would be helpful.<br>
<br>
<br>
Section 3.1 Penultimate Paragraph<br>
<br>
As TAGs with &quot;global&quot; scope will be advertised by the IGP multipl=
e<br>
times (once per area/level) I assume you are asking BGP-LS advertisements<b=
r>
to reduce these multiple occurrences to a single occurrence? More<br>
explicit language on that point would be helpful.<br>
<br>
Section 3.1 Last paragraph<br>
<br>
I recognize this statement regarding policy being used to filter what is<br=
>
advertised is consistent with RFC 7752. But it would also be good to includ=
e<br>
a statement like:<br>
<br>
&quot;Definition of such a policy is outside the scope of this document.&qu=
ot;<br>
<br>
Nits: Please see attached diff file with some editorial corrections.<u></u>=
<u></u></p>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div></div></div>
</div>
</div>

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

--94eb2c07d10c6e277c0555245917--


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Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-bgp-ls-node-admin-tag-extension-01
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IDR:=20

=20

With the completion of the resolution of the RTG-DIR comments, we will =
consider the IDR WG last call complete.  This document has passed WG LC. =
 If anyone has additional comments based on version 2 of the text, =
please send them to the IDR chairs.=20

=20

Sue Hares=20

=20

From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Pushpasis =
Sarkar
Sent: Tuesday, July 25, 2017 9:32 AM
To: Les Ginsberg (ginsberg)
Cc: rtg-dir@ietf.org; idr-ads@ietf.org; =
draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.org; idr@ietf. =
org
Subject: Re: [RTG-DIR] RtgDir review: =
draft-ietf-idr-bgp-ls-node-admin-tag-extension-01

=20

Hi Les,

=20

Thank you once again for helping me out with all the review comments.. I =
have addressed all your comments and uploaded version 02. Please let me =
know if you need any more issues to take care of.

=20

Thanks and Regards,

-Pushpasis

=20

=20

On Thu, Jul 13, 2017 at 5:24 PM, Pushpasis Sarkar =
<pushpasis.ietf@gmail.com> wrote:

Hi Les,

=20

Sorry once again for the late response. Please find comments inline...

=20

=20

On Sat, Jul 8, 2017 at 1:42 PM, Les Ginsberg (ginsberg) =
<ginsberg@cisco.com> wrote:

Pushpassis =E2=80=93

=20

Sorry for the delay in responding.

You have not addressed all of the editorial comments I provided =
=E2=80=93 please do a second pass.

[Pushpasis] I did a second pass.. But I could not locate which one(s) I =
missed out. It will be great if you list them out for me. The htmlized =
diff you attached earlier does not exactly highlight the diffs.. :( =
Request your help here...=20

=20

=20

Also, there is one substantive issue which you did not address:

=20

<snip>

Section 3.1 Last paragraph

=20

I recognize this statement regarding policy being used to filter what is

advertised is consistent with RFC 7752. But it would also be good to =
include

a statement like:

=20

"Definition of such a policy is outside the scope of this document."

<end snip>

=20

If you have a concern with what I proposed please let me know what it =
is.

[Pushpasis] I will be very happy to add the statement.  Thanks a lot for =
the suggestion.

=20

Thanks and Regards,

-Pushpasis

=20

Thanx.

=20

   Les

=20

=20

=20

From: Pushpasis Sarkar [mailto:pushpasis.ietf@gmail.com]=20
Sent: Tuesday, July 04, 2017 8:58 PM
To: Les Ginsberg (ginsberg)
Cc: idr-ads@ietf.org; rtg-dir@ietf.org; =
draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.org; idr@ietf. =
org
Subject: Re: RtgDir review: =
draft-ietf-idr-bgp-ls-node-admin-tag-extension-01

=20

Hi Les,

=20

Thank you once more for the review comments. And sorry for the late =
reply. I have addressed all your comments in the attached draft. Please =
review the same let me know if you have any more comments. If not I will =
upload the draft soon.

=20

Thanks and regards,

-Pushpasis

=20

On Wed, Jun 28, 2017 at 10:26 PM, Pushpasis Sarkar =
<pushpasis.ietf@gmail.com> wrote:

Hi Les,

=20

Thanks a lot for the review comments. I will reply back addressing your =
comments soon.

=20

Thanks and regards

-Pushpasis

=20

On Tue, Jun 27, 2017 at 11:37 PM, Les Ginsberg (ginsberg) =
<ginsberg@cisco.com> wrote:

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 =
comments that you receive, and strive to resolve them through discussion =
or by updating the draft.


Document: draft-ietf-idr-bgp-ls-node-admin-tag-extension-01
Reviewer: Les Ginsberg
Review Date: June 27, 2017
Intended Status: Standards

Summary:  The document is of modest scope - covering definition of =
BGP-LS
codepoints for a relatively new IGP attribute (Node Admin Tags).
While I found nothing which I would consider a major issue, there are a =
number
of places where the text lacks clarity. I think addressing these areas =
would
greatly improve the quality of the draft.


Major Issues: None

Minor Issues:

Section 1 Introduction

The acronym LSDB is not defined.

Figure 1

I have a personal dislike for duplicating text/pictures from another
spec when that spec could simply be referenced. There are only two
possible outcomes:

1)The duplicated text is redundant (best case)
2)The text differs somewhat from the original leading to possible
unintentional misinterpretations.

Suit yourself on this comment - but I would prefer the duplication be =
omitted.

Section 2 First paragraph

You refer to "sub-TLV" but that reference is unclear and ambiguous.
IS-IS uses a sub-TLV of Router Capability to advertise tags, but OSPF
uses a TLV of Router Info LSA.
What seems most relevant here is that you are defining a new Attribute
TLV for Node NLRI.

Section 3 Second paragraph

I do not know what the paragraph is trying to say, nor do
I know what the "TBD" in columns 4 and 5 in the following Table 1 is
meant to reference. If you are simply trying to describe the source
of the info advertised by the new BGP-LS Node attribute then you should
rewrite the above paragraph and in the figure below show:

IS-IS 242/21
OSPF RI-LSA/10

Section 3.1

A description of where in the Node NLRI the area/level information can =
be found
(from RFC 7752) would be helpful.


Section 3.1 Penultimate Paragraph

As TAGs with "global" scope will be advertised by the IGP multiple
times (once per area/level) I assume you are asking BGP-LS =
advertisements
to reduce these multiple occurrences to a single occurrence? More
explicit language on that point would be helpful.

Section 3.1 Last paragraph

I recognize this statement regarding policy being used to filter what is
advertised is consistent with RFC 7752. But it would also be good to =
include
a statement like:

"Definition of such a policy is outside the scope of this document."

Nits: Please see attached diff file with some editorial corrections.

=20

=20

=20

=20


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<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>IDR: <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>With the completion of the resolution of the RTG-DIR comments, we =
will consider the IDR WG last call complete.=C2=A0 This document has =
passed WG LC.=C2=A0 If anyone has additional comments based on version 2 =
of the text, please send them to the IDR chairs. =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue Hares <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
rtg-dir [mailto:rtg-dir-bounces@ietf.org] <b>On Behalf Of </b>Pushpasis =
Sarkar<br><b>Sent:</b> Tuesday, July 25, 2017 9:32 AM<br><b>To:</b> Les =
Ginsberg (ginsberg)<br><b>Cc:</b> rtg-dir@ietf.org; idr-ads@ietf.org; =
draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.org; idr@ietf. =
org<br><b>Subject:</b> Re: [RTG-DIR] RtgDir review: =
draft-ietf-idr-bgp-ls-node-admin-tag-extension-01<o:p></o:p></span></p><p=
 class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal>Hi =
Les,<o:p></o:p></p><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>Thank you once again for helping me out with all the =
review comments.. I have addressed all your comments and uploaded =
version 02. Please let me know if you need any more issues to take care =
of.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>Thanks and Regards,<o:p></o:p></p></div><div><p =
class=3DMsoNormal>-Pushpasis<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal>On Thu, =
Jul 13, 2017 at 5:24 PM, Pushpasis Sarkar &lt;<a =
href=3D"mailto:pushpasis.ietf@gmail.com" =
target=3D"_blank">pushpasis.ietf@gmail.com</a>&gt; =
wrote:<o:p></o:p></p><div><p class=3DMsoNormal>Hi =
Les,<o:p></o:p></p><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>Sorry once again for the late response. Please find =
comments inline...<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal>On Sat, =
Jul 8, 2017 at 1:42 PM, Les Ginsberg (ginsberg) &lt;<a =
href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; =
wrote:<o:p></o:p></p><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Pushpassis =E2=80=93</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sorry for the delay in responding.</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>You have not addressed all of the editorial comments I provided =
=E2=80=93 please do a second =
pass.</span><o:p></o:p></p></div></div><div><p =
class=3DMsoNormal>[Pushpasis] I did a second pass.. But I could not =
locate which one(s) I missed out. It will be great if you list them out =
for me. The htmlized diff you attached earlier does not exactly =
highlight the diffs.. :( Request your help =
here...&nbsp;<o:p></o:p></p></div><div><p =
class=3DMsoNormal>&nbsp;<o:p></o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Also, there is one substantive issue which you did not =
address:</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&lt;snip&gt;</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Section 3.1 Last paragraph</span></i><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>I recognize this statement regarding policy being used to filter what =
is</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>advertised is consistent with RFC 7752. But it would also be good to =
include</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>a statement like:</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&quot;Definition of such a policy is outside the scope of this =
document.&quot;</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&lt;end snip&gt;</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.=
5in'><i><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span></i><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>If you have a concern with what I proposed please let me know what it =
is.</span><o:p></o:p></p></div></div></blockquote><div><p =
class=3DMsoNormal>[Pushpasis] I will be very happy to add the =
statement.&nbsp; Thanks a lot for the =
suggestion.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>Thanks and Regards,<o:p></o:p></p></div><div><p =
class=3DMsoNormal>-Pushpasis<o:p></o:p></p></div><div><div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Thanx.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;&nbsp; Les</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt'><div><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Pushpasis Sarkar [mailto:<a href=3D"mailto:pushpasis.ietf@gmail.com" =
target=3D"_blank">pushpasis.ietf@gmail.com</a>] <br><b>Sent:</b> =
Tuesday, July 04, 2017 8:58 PM<br><b>To:</b> Les Ginsberg =
(ginsberg)<br><b>Cc:</b> <a href=3D"mailto:idr-ads@ietf.org" =
target=3D"_blank">idr-ads@ietf.org</a>; <a =
href=3D"mailto:rtg-dir@ietf.org" target=3D"_blank">rtg-dir@ietf.org</a>; =
<a =
href=3D"mailto:draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf.or=
g" =
target=3D"_blank">draft-ietf-idr-bgp-ls-node-admin-tag-extension.all@ietf=
.org</a>; idr@ietf. org<br><b>Subject:</b> Re: RtgDir review: =
draft-ietf-idr-bgp-ls-node-admin-tag-extension-01</span><o:p></o:p></p></=
div></div><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hi =
Les,<o:p></o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thank you =
once more for the review comments. And sorry for the late reply. I have =
addressed all your comments in the attached draft. Please review the =
same let me know if you have any more comments. If not I will upload the =
draft soon.<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thanks and =
regards,<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>-Pushpasis<o=
:p></o:p></p></div></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Wed, Jun =
28, 2017 at 10:26 PM, Pushpasis Sarkar &lt;<a =
href=3D"mailto:pushpasis.ietf@gmail.com" =
target=3D"_blank">pushpasis.ietf@gmail.com</a>&gt; =
wrote:<o:p></o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hi =
Les,<o:p></o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thanks a =
lot for the review comments. I will reply back addressing your comments =
soon.<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thanks and =
regards<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'color:#888888'>-Pushpasis</span><o:p></o:p></p></div></div><div>=
<div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Tue, Jun =
27, 2017 at 11:37 PM, Les Ginsberg (ginsberg) &lt;<a =
href=3D"mailto:ginsberg@cisco.com" =
target=3D"_blank">ginsberg@cisco.com</a>&gt; wrote:<o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hello,<br><b=
r>&nbsp;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&nbsp; <a =
href=3D"http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir" =
target=3D"_blank">http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir</a=
> .<br><br>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 comments that you receive, and strive to resolve them =
through discussion or by updating the draft.<br><br><br>Document: =
draft-ietf-idr-bgp-ls-node-admin-tag-extension-01<br>Reviewer: Les =
Ginsberg<br>Review Date: June 27, 2017<br>Intended Status: =
Standards<br><br>Summary:&nbsp; The document is of modest scope - =
covering definition of BGP-LS<br>codepoints for a relatively new IGP =
attribute (Node Admin Tags).<br>While I found nothing which I would =
consider a major issue, there are a number<br>of places where the text =
lacks clarity. I think addressing these areas would<br>greatly improve =
the quality of the draft.<br><br><br>Major Issues: None<br><br>Minor =
Issues:<br><br>Section 1 Introduction<br><br>The acronym LSDB is not =
defined.<br><br>Figure 1<br><br>I have a personal dislike for =
duplicating text/pictures from another<br>spec when that spec could =
simply be referenced. There are only two<br>possible =
outcomes:<br><br>1)The duplicated text is redundant (best case)<br>2)The =
text differs somewhat from the original leading to =
possible<br>unintentional misinterpretations.<br><br>Suit yourself on =
this comment - but I would prefer the duplication be =
omitted.<br><br>Section 2 First paragraph<br><br>You refer to =
&quot;sub-TLV&quot; but that reference is unclear and =
ambiguous.<br>IS-IS uses a sub-TLV of Router Capability to advertise =
tags, but OSPF<br>uses a TLV of Router Info LSA.<br>What seems most =
relevant here is that you are defining a new Attribute<br>TLV for Node =
NLRI.<br><br>Section 3 Second paragraph<br><br>I do not know what the =
paragraph is trying to say, nor do<br>I know what the &quot;TBD&quot; in =
columns 4 and 5 in the following Table 1 is<br>meant to reference. If =
you are simply trying to describe the source<br>of the info advertised =
by the new BGP-LS Node attribute then you should<br>rewrite the above =
paragraph and in the figure below show:<br><br>IS-IS 242/21<br>OSPF =
RI-LSA/10<br><br>Section 3.1<br><br>A description of where in the Node =
NLRI the area/level information can be found<br>(from RFC 7752) would be =
helpful.<br><br><br>Section 3.1 Penultimate Paragraph<br><br>As TAGs =
with &quot;global&quot; scope will be advertised by the IGP =
multiple<br>times (once per area/level) I assume you are asking BGP-LS =
advertisements<br>to reduce these multiple occurrences to a single =
occurrence? More<br>explicit language on that point would be =
helpful.<br><br>Section 3.1 Last paragraph<br><br>I recognize this =
statement regarding policy being used to filter what is<br>advertised is =
consistent with RFC 7752. But it would also be good to include<br>a =
statement like:<br><br>&quot;Definition of such a policy is outside the =
scope of this document.&quot;<br><br>Nits: Please see attached diff file =
with some editorial corrections.<o:p></o:p></p></div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p></div></div></div></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<o:p><=
/o:p></p></div></div></div></div></div></div></blockquote></div></div></d=
iv><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></div></body></html>
------=_NextPart_000_0127_01D30531.6EE27E70--


From nobody Tue Jul 25 10:30:25 2017
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To: "'Ines Robles'" <mariainesrobles@googlemail.com>, <rtg-dir@ietf.org>
Cc: <rtg-ads@ietf.org>, <i2rs@ietf.org>, <ietf@ietf.org>, <draft-ietf-i2rs-yang-network-topo.all@ietf.org>
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Subject: Re: [RTG-DIR] [i2rs] Rtgdir last call review of draft-ietf-i2rs-yang-network-topo-14
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Ines:

Getting this review on the Monday after IETF shows what a diligent =
reviewer you are.  The authors will be responding shortly.=20

Cheerily,=20
Sue Hares=20

-----Original Message-----
From: i2rs [mailto:i2rs-bounces@ietf.org] On Behalf Of Ines Robles
Sent: Monday, July 24, 2017 7:14 PM
To: rtg-dir@ietf.org
Cc: rtg-ads@ietf.org; i2rs@ietf.org; ietf@ietf.org; =
draft-ietf-i2rs-yang-network-topo.all@ietf.org
Subject: [i2rs] Rtgdir last call review of =
draft-ietf-i2rs-yang-network-topo-14

Reviewer: Ines Robles
Review result: Has Issues

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-i2rs-yang-network-topo-14.txt
Reviewer: Ines Robles
Review Date: 07-25-2017
Intended status: Standards Track

Summary:
I have some minor concerns about this document that I think should be =
resolved before publication.

Comments:

I believe the draft is technically good. This document is well written =
and clear to understand. The figures are clear and helpful.

Major Issues:

No major issues found.

Minor Issues:

Since this document specifies a data model, I would include some text =
related to the Information Model [RFC 3444]. How would it be in this =
context?

1- Section 1

  1.a following Figure 1 (Page 4):

    I would add in the figure the corresponding section that explain the
    module. e.g. Abstract Network Model, I would add in the figure =
"Abstract
    (base) Network Model" and "section 4.1". The same for "Abstract =
Topology
    Model", should it be section 4.2?

  1.b -following Figure 2 (Page 5):

      1.b.1- " X1 and X2 - mapping onto... ",  I think it would be "X1 =
and X3
      mapping onto..."

      1.b.2- " a single L3 network element", I would add in this case =
(Y2) "a
      single L3 (Y2) network element", the same for "The figure shows a =
single
      "L3" network element mapped onto multiple "Optical" network =
elements.", I
      would add "The figure shows a single "L3" network element (Y2) =
mapped
      onto multiple "Optical" network elements [Z] and [Z1]."

      1.b.3- I would expand ROADMs --> Reconfigurable Optical Add/Drop
      Multiplexers (ROADMs)

2- Section 2:

  2.1- I would add a reference to RFC 6020, since the document uses =
terminology
  e.g container, augment, etc. which are defined in 6020. Even if this =
RFC is
  mentioned in the normative reference, still I would add it here as =
well.

3- Section 3:

  3.1-  ReST is mentioned here but not in the rest of the draft, is this
  correct?

Nits:

1- Pag. 18: is that correct?: "(a string is a string is a string)"

2- pag. 34: I would expand NMS -> NMS (Network Management System)

3- pag. 34: I would add a definition about TE Topology : "TE-Topology: =
The TE Topology is a schematic arrangement of TE nodes
   and TE links in a given TED. It forms the basis for a graph suitable
   for TE path computations."
   [https://tools.ietf.org/html/draft-ietf-teas-yang-te-topo-12]

4- pag. 34: topoogical -> topological

5- pag 35: "uber-network device" -> over-network device?

Thanks,

Ines.


_______________________________________________
i2rs mailing list
i2rs@ietf.org
https://www.ietf.org/mailman/listinfo/i2rs


From nobody Wed Jul 26 08:09:23 2017
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From: "Alexander Clemm" <ludwig@clemm.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/axyM86c_NY5SL7WwKzJab3o9ClY>
Subject: Re: [RTG-DIR] [i2rs] Rtgdir last call review of draft-ietf-i2rs-yang-network-topo-14
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Ines,=20

Thank you for your review!  We will be updating the document soon. =20

Kind regards
--- Alex

-----Original Message-----
From: i2rs [mailto:i2rs-bounces@ietf.org] On Behalf Of Susan Hares
Sent: Tuesday, July 25, 2017 10:24 AM
To: 'Ines Robles' <mariainesrobles@googlemail.com>; rtg-dir@ietf.org
Cc: rtg-ads@ietf.org; i2rs@ietf.org; ietf@ietf.org; =
draft-ietf-i2rs-yang-network-topo.all@ietf.org
Subject: Re: [i2rs] Rtgdir last call review of =
draft-ietf-i2rs-yang-network-topo-14

Ines:

Getting this review on the Monday after IETF shows what a diligent =
reviewer you are.  The authors will be responding shortly.=20

Cheerily,=20
Sue Hares=20

-----Original Message-----
From: i2rs [mailto:i2rs-bounces@ietf.org] On Behalf Of Ines Robles
Sent: Monday, July 24, 2017 7:14 PM
To: rtg-dir@ietf.org
Cc: rtg-ads@ietf.org; i2rs@ietf.org; ietf@ietf.org; =
draft-ietf-i2rs-yang-network-topo.all@ietf.org
Subject: [i2rs] Rtgdir last call review of =
draft-ietf-i2rs-yang-network-topo-14

Reviewer: Ines Robles
Review result: Has Issues

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-i2rs-yang-network-topo-14.txt
Reviewer: Ines Robles
Review Date: 07-25-2017
Intended status: Standards Track

Summary:
I have some minor concerns about this document that I think should be =
resolved before publication.

Comments:

I believe the draft is technically good. This document is well written =
and clear to understand. The figures are clear and helpful.

Major Issues:

No major issues found.

Minor Issues:

Since this document specifies a data model, I would include some text =
related to the Information Model [RFC 3444]. How would it be in this =
context?

1- Section 1

  1.a following Figure 1 (Page 4):

    I would add in the figure the corresponding section that explain the
    module. e.g. Abstract Network Model, I would add in the figure =
"Abstract
    (base) Network Model" and "section 4.1". The same for "Abstract =
Topology
    Model", should it be section 4.2?

  1.b -following Figure 2 (Page 5):

      1.b.1- " X1 and X2 - mapping onto... ",  I think it would be "X1 =
and X3
      mapping onto..."

      1.b.2- " a single L3 network element", I would add in this case =
(Y2) "a
      single L3 (Y2) network element", the same for "The figure shows a =
single
      "L3" network element mapped onto multiple "Optical" network =
elements.", I
      would add "The figure shows a single "L3" network element (Y2) =
mapped
      onto multiple "Optical" network elements [Z] and [Z1]."

      1.b.3- I would expand ROADMs --> Reconfigurable Optical Add/Drop
      Multiplexers (ROADMs)

2- Section 2:

  2.1- I would add a reference to RFC 6020, since the document uses =
terminology
  e.g container, augment, etc. which are defined in 6020. Even if this =
RFC is
  mentioned in the normative reference, still I would add it here as =
well.

3- Section 3:

  3.1-  ReST is mentioned here but not in the rest of the draft, is this
  correct?

Nits:

1- Pag. 18: is that correct?: "(a string is a string is a string)"

2- pag. 34: I would expand NMS -> NMS (Network Management System)

3- pag. 34: I would add a definition about TE Topology : "TE-Topology: =
The TE Topology is a schematic arrangement of TE nodes
   and TE links in a given TED. It forms the basis for a graph suitable
   for TE path computations."
   [https://tools.ietf.org/html/draft-ietf-teas-yang-te-topo-12]

4- pag. 34: topoogical -> topological

5- pag 35: "uber-network device" -> over-network device?

Thanks,

Ines.


_______________________________________________
i2rs mailing list
i2rs@ietf.org
https://www.ietf.org/mailman/listinfo/i2rs

_______________________________________________
i2rs mailing list
i2rs@ietf.org
https://www.ietf.org/mailman/listinfo/i2rs


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From: Victoria Pritchard <pritchardv0@gmail.com>
Date: Thu, 27 Jul 2017 22:31:23 +0100
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Subject: [RTG-DIR] RtgDir review: draft-ietf-teas-rsvp-te-scaling-rec-05
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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-teas-rsvp-te-scaling-rec-05
Reviewer: Victoria Pritchard
Review Date: 27/07/2017
IETF LC End Date:
Intended Status: Standards Track

*Summary:*

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

*Comments:*

The draft is well written and really clear to read, although contains some
language which does not read as formally as I would expect from a standards
track document, especially in the appendix.

*Major Issues:*

No major issues found.

*Minor Issues:*

No minor issues found.

*Nits:*

Section 2.2 "MUST act as if the all the Path" contains an extra "the".

Section 2.3 "RSVP- TE control plane congestion" has an extra space after
RSVP.

Also, I'm not sure a sentence should start with "And".

Section 2.3.2 "it is risky to assume" - would it be better to say MUST NOT
assume, or SHOULD NOT assume?

Appendix - after stating the default value, would help to separate the
explanation using either a full stop or a new line.

"sort of analogous", "same ballpark", "nicely matches up", "about 30 (31.5
to be precise)" seemed strange phrases to use and could be reworded to be
more formal.

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<div dir=3D"ltr"><p style=3D"color:rgb(0,0,0);font-family:Verdana,Arial,&qu=
ot;Bitstream Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">Hello,<br=
></p><p style=3D"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 purp=
ose of the review is to provide assistance to the Routing ADs. For more inf=
ormation about the Routing Directorate, please see=C2=A0<a class=3D"ext-lin=
k" href=3D"http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir" style=3D"t=
ext-decoration-line:none;color:rgb(187,0,0);border-bottom:1px dotted rgb(18=
7,187,187)"><span class=3D"gmail-icon" style=3D"background:url(&quot;../ext=
link.gif&quot;) 0% 50% no-repeat;padding-left:15px">=E2=80=8B</span>http://=
trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir</a></p><p style=3D"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 us=
e 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 reso=
lve them through discussion or by updating the draft.</p><p style=3D"color:=
rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream Vera Sans&quot;,Helvet=
ica,sans-serif;font-size:13px">Document: draft-ietf-teas-rsvp-te-scaling-re=
c-05=C2=A0<br>Reviewer: Victoria Pritchard<br>Review Date: 27/07/2017<br>IE=
TF LC End Date: =C2=A0<br>Intended Status: Standards Track</p><p style=3D"c=
olor:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream Vera Sans&quot;,H=
elvetica,sans-serif;font-size:13px"><strong>Summary:</strong></p><p style=
=3D"color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream Vera Sans&qu=
ot;,Helvetica,sans-serif;font-size:13px">This document is basically ready f=
or publication, but has nits that should be considered prior to publication=
.</p><p style=3D"color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream=
 Vera Sans&quot;,Helvetica,sans-serif;font-size:13px"><strong>Comments:</st=
rong></p><p style=3D"color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitst=
ream Vera Sans&quot;,Helvetica,sans-serif;font-size:13px">The draft is well=
 written and really clear to read, although contains some language which do=
es not read as formally as I would expect from a standards track document, =
especially in the appendix.</p><p style=3D"color:rgb(0,0,0);font-family:Ver=
dana,Arial,&quot;Bitstream Vera Sans&quot;,Helvetica,sans-serif;font-size:1=
3px"><strong>Major Issues:</strong></p><p style=3D"color:rgb(0,0,0);font-fa=
mily:Verdana,Arial,&quot;Bitstream Vera Sans&quot;,Helvetica,sans-serif;fon=
t-size:13px">No major issues found.</p><p style=3D"color:rgb(0,0,0);font-fa=
mily:Verdana,Arial,&quot;Bitstream Vera Sans&quot;,Helvetica,sans-serif;fon=
t-size:13px"><strong>Minor Issues:</strong></p><p style=3D"color:rgb(0,0,0)=
;font-family:Verdana,Arial,&quot;Bitstream Vera Sans&quot;,Helvetica,sans-s=
erif;font-size:13px">No minor issues found.</p><p style=3D"color:rgb(0,0,0)=
;font-family:Verdana,Arial,&quot;Bitstream Vera Sans&quot;,Helvetica,sans-s=
erif;font-size:13px"><strong>Nits:</strong></p><p style=3D"color:rgb(0,0,0)=
;font-family:Verdana,Arial,&quot;Bitstream Vera Sans&quot;,Helvetica,sans-s=
erif;font-size:13px">Section 2.2 &quot;MUST act as if the all the Path&quot=
; contains an extra &quot;the&quot;.</p><p style=3D"color:rgb(0,0,0);font-f=
amily:Verdana,Arial,&quot;Bitstream Vera Sans&quot;,Helvetica,sans-serif;fo=
nt-size:13px">Section 2.3=C2=A0<span style=3D"font-size:small">&quot;RSVP- =
TE control plane congestion&quot; has an extra space after RSVP.</span></p>=
<p style=3D"color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bitstream Vera=
 Sans&quot;,Helvetica,sans-serif;font-size:13px"><span style=3D"font-size:s=
mall">Also, I&#39;m not sure a sentence should start with &quot;And&quot;.<=
/span></p><p style=3D"color:rgb(0,0,0);font-family:Verdana,Arial,&quot;Bits=
tream Vera Sans&quot;,Helvetica,sans-serif;font-size:13px"><span style=3D"f=
ont-size:small">Section 2.3.2 &quot;it is risky to assume&quot; - would it =
be better to say MUST NOT assume, or SHOULD NOT assume?</span><span style=
=3D"font-size:small"><br></span></p><p style=3D"color:rgb(0,0,0);font-famil=
y:Verdana,Arial,&quot;Bitstream Vera Sans&quot;,Helvetica,sans-serif;font-s=
ize:13px"><span style=3D"font-size:small">Appendix - after stating the defa=
ult value, would help to separate the explanation using either a full stop =
or a new line.</span></p><p style=3D"color:rgb(0,0,0);font-family:Verdana,A=
rial,&quot;Bitstream Vera Sans&quot;,Helvetica,sans-serif;font-size:13px"><=
span style=3D"font-size:small">&quot;sort of analogous&quot;, &quot;same ba=
llpark&quot;, &quot;nicely matches up&quot;, &quot;about 30 (31.5 to be pre=
cise)&quot; seemed strange phrases to use and could be reworded to be more =
formal.</span></p><p style=3D"color:rgb(0,0,0);font-family:Verdana,Arial,&q=
uot;Bitstream Vera Sans&quot;,Helvetica,sans-serif;font-size:13px"><br></p>=
<div><font color=3D"#000000" face=3D"Verdana, Arial, Bitstream Vera Sans, H=
elvetica, sans-serif"><br></font></div></div>

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