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From: Tal Mizrahi <tal.mizrahi.phd@gmail.com>
Date: Mon, 2 Sep 2019 08:14:05 +0300
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To: draft-ietf-sfc-oam-framework@ietf.org,  Service Function Chaining IETF list <sfc@ietf.org>, sfc-chairs@ietf.org
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Subject: [sfc] Shepherd Review of draft-ietf-sfc-oam-framework-10
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Hi,

I am the assigned shepherd of draft-ietf-sfc-oam-framework-10.
I believe the document is almost ready for publication.
I have a few (mostly editorial) comments, as follows.
It would be great if the authors could post a new version that addresses
these comments, and then we can proceed with the publication process.


   - RFC 7498 is an informative reference, but the introduction says that
   the reader is expected to be familiar with it. I suggest to change either
   one or the other.
   - Is there a reason why RFC 8459 is a normative reference? I suggest to
   make it informative.
   - Regarding IOAM (Section 6.4.3) - the section describes the
   proof-of-transit draft, but should also mention
   - draft-ietf-sfc-ioam-nsh.
   - Section 1 (Introduction) lists the content in the rest of the
   sections, but does not mention Section 6, which suggests candidate tools.
   - "with the same" ==> "this terminology"
   - "The link layer, which is dependent upon the physical technology
   used." ==> "The link layer, which is tightly coupled with the physical
   technology used."
   - "depicts a sample example" ==> "depicts an example"
   - In Tables 3 and 4, it is not clear why some of the columns are
   separated by "|", and some are separated by "+".
   - "Tables 4" ==> "Table 4"
   - "for fast failure detection" - I suggest to remove the word fast, as
   BFD is not necessarily fast.
   - Section 6.4 says that "This section describes the applicability of
   some of the available toolsets in the service layer.", however, section
   "6.4.4 SFC Traceroute" describes a tool that was defined in an expired
   individual submission. I suggest to either remove section 6.4.4., or to
   explicitly mention that this draft has expired, and that a new tool can be
   defined along the lines of this proposal.
   - Section 3 describes three OAM components (SF, SFC, Classifier), but
   then Section 5 and Section 7 (Table 3, Table 4) do not refer to these three
   components, but to Underlay, Overlay, SF and SFC. Please be consistent, so
   that Section 5-7 refer to the same components that were defined in Section
   3.
   - Moreover, in Section 3, for each of the first two components (SF and
   SFC) there is a discussion about availability and performance measurement.
   However, for the third component (Classifier), there is no explicit
   discussion about availability and performance measurement. I suggest to add
   this missing discussion (even if these functions are not required, it is
   still important to mention this).

Cheers,
Tal.

--0000000000002e4b2405918b0b7b
Content-Type: text/html; charset="UTF-8"
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<div dir=3D"ltr"><div><font face=3D"monospace">Hi,</font></div><div><font f=
ace=3D"monospace"><br></font></div><div><font face=3D"monospace">I am the a=
ssigned shepherd of=C2=A0draft-ietf-sfc-oam-framework-10.</font></div><font=
 face=3D"monospace">I believe the document is almost ready for publication.=
 <br>I have a few (mostly editorial) comments, as follows.<br>It would be g=
reat if the authors could post a new version that addresses these comments,=
 and then we can proceed with the publication process.</font><br><br><ul st=
yle=3D"font-family:monospace"><li><font face=3D"monospace">RFC 7498 is an i=
nformative reference, but the introduction says that the reader is expected=
 to be familiar with it. I suggest to change either one or the other.</font=
></li><li><font face=3D"monospace">Is there a reason why RFC 8459 is a norm=
ative reference? I suggest to make it informative.</font></li><li><font fac=
e=3D"monospace">Regarding IOAM (Section 6.4.3) - the section describes the =
proof-of-transit draft, but should also mention </font></li><li><font face=
=3D"monospace">draft-ietf-sfc-ioam-nsh.</font></li><li><font face=3D"monosp=
ace">Section 1 (Introduction) lists the content in the rest of the sections=
, but does not mention Section 6, which suggests candidate tools.</font></l=
i><li><font face=3D"monospace">&quot;with the same&quot; =3D=3D&gt; &quot;t=
his terminology&quot;</font></li><li><font face=3D"monospace">&quot;The lin=
k layer, which is dependent upon the physical technology used.&quot; =3D=3D=
&gt; &quot;The link layer, which is tightly coupled with the physical techn=
ology used.&quot;</font></li><li><font face=3D"monospace">&quot;depicts a s=
ample example&quot; =3D=3D&gt; &quot;depicts an example&quot;</font></li><l=
i><font face=3D"monospace">In Tables 3 and 4, it is not clear why some of t=
he columns are separated by &quot;|&quot;, and some are separated by &quot;=
+&quot;.</font></li><li><font face=3D"monospace">&quot;Tables 4&quot; =3D=
=3D&gt; &quot;Table 4&quot;</font></li><li><font face=3D"monospace">&quot;f=
or fast failure detection&quot; - I suggest to remove the word fast, as BFD=
 is not necessarily fast.</font></li><li><font face=3D"monospace">Section 6=
.4 says that &quot;This section describes the applicability of some of the =
available toolsets in the service layer.&quot;, however, section &quot;6.4.=
4 SFC Traceroute&quot; describes a tool that was defined in an expired indi=
vidual submission. I suggest to either remove section 6.4.4., or to explici=
tly mention that this draft has expired, and that a new tool can be defined=
 along the lines of this proposal.</font></li><li><font face=3D"monospace">=
Section 3 describes three OAM components (SF, SFC, Classifier), but then Se=
ction 5 and Section 7 (Table 3, Table 4) do not refer to these three compon=
ents, but to Underlay, Overlay, SF and SFC. Please be consistent, so that S=
ection 5-7 refer to the same components that were defined in Section 3.</fo=
nt></li><li><font face=3D"monospace">Moreover, in Section 3, for each of th=
e first two components (SF and SFC) there is a discussion about availabilit=
y and performance measurement. However, for the third component (Classifier=
), there is no explicit discussion about availability and performance measu=
rement. I suggest to add this missing discussion (even if these functions a=
re not required, it is still important to mention this).</font></li></ul><d=
iv><font face=3D"monospace">Cheers,</font></div><div><font face=3D"monospac=
e">Tal.</font></div></div>

--0000000000002e4b2405918b0b7b--


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From: "Nagendra Kumar Nainar (naikumar)" <naikumar@cisco.com>
To: Tal Mizrahi <tal.mizrahi.phd@gmail.com>, "draft-ietf-sfc-oam-framework@ietf.org" <draft-ietf-sfc-oam-framework@ietf.org>, Service Function Chaining IETF list <sfc@ietf.org>, "sfc-chairs@ietf.org" <sfc-chairs@ietf.org>
Thread-Topic: [sfc] Shepherd Review of draft-ietf-sfc-oam-framework-10
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Date: Tue, 3 Sep 2019 14:28:48 +0000
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From: Tal Mizrahi <tal.mizrahi.phd@gmail.com>
Date: Wed, 4 Sep 2019 14:33:04 +0300
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To: James Guichard <james.n.guichard@futurewei.com>, aldrin.ietf@gmail.com,  ramkri123@gmail.com
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Subject: Re: [sfc] WG Last Call draft-ietf-sfc-oam-framework-09
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Sam and Ramki,

Will appreciate if you can respond to Jim's question regarding IPRs.

Thanks,
Tal.

On Tue, Jul 23, 2019 at 4:28 PM James Guichard <
james.n.guichard@futurewei.com> wrote:

> Dear WG:
>
>
>
> This email closes the WG LC for draft-ietf-sfc-oam-framework-09. The
> chairs have concluded that there is enough support to move this document
> forward for publication as an Informational RFC. Authors, please confirm
> that any IPR you are aware of has been declared.
>
>
>
> Thanks!
>
>
>
> Jim & Joel
>
>
>
>
>
>
>
> *From:* James Guichard
> *Sent:* Monday, July 08, 2019 9:15 AM
> *To:* sfc@ietf.org
> *Subject:* RE: WG Last Call draft-ietf-sfc-oam-framework-06
>
>
>
> Dear WG:
>
>
>
> Before closing this WG Last Call, we (the chairs) would like to better
> understand the level of interest and commitment the WG has on progressing
> OAM work for SFC, starting with draft-ietf-sfc-oam-framework as a baselin=
e.
> Please reply to this email with either support for the document, or
> non-support (we do not need this document). Silence does not imply suppor=
t
> or lack thereof so please take time to state your opinions with a brief
> rational for support/non-support.
>
>
>
> Thanks!
>
>
>
> Jim & Joel
>
>
>
>
>
> *From:* James Guichard
> *Sent:* Tuesday, May 28, 2019 10:30 AM
> *To:* sfc@ietf.org
> *Subject:* WG Last Call draft-ietf-sfc-oam-framework-06
>
>
>
> Dear WG:
>
>
>
> This message starts a new two week WG Last Call on advancing
> https://datatracker.ietf.org/doc/draft-ietf-sfc-oam-framework/
> <https://nam03.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdata=
tracker.ietf.org%2Fdoc%2Fdraft-ietf-sfc-oam-framework%2F&data=3D02%7C01%7Cj=
ames.n.guichard%40futurewei.com%7Ce47e5eb13f224f18c46408d6e378b2f7%7C0fee8f=
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lkqGANQpnIvBRdbjKAqYtzTUdTfB9f3Y%3D&reserved=3D0>
> for publication as an Informational RFC.
>
>
>
> Substantive comments and statements of support for publishing this
> document should be directed to the mailing list. Editorial suggestions ca=
n
> be sent to the authors.  This last call will end on 11th June 2019.
>
>
>
> Thanks!
>
>
>
> Jim & Joel
>
>
>
>
>
>
>
>
> _______________________________________________
> sfc mailing list
> sfc@ietf.org
> https://www.ietf.org/mailman/listinfo/sfc
>

--0000000000002165230591b892dd
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<div dir=3D"ltr"><div dir=3D"ltr">Sam and Ramki,<div><br></div><div>Will ap=
preciate if you can respond to Jim&#39;s question regarding IPRs.</div><div=
><br></div><div>Thanks,</div><div>Tal.</div></div><br><div class=3D"gmail_q=
uote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, Jul 23, 2019 at 4:28 PM=
 James Guichard &lt;<a href=3D"mailto:james.n.guichard@futurewei.com">james=
.n.guichard@futurewei.com</a>&gt; wrote:<br></div><blockquote class=3D"gmai=
l_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,20=
4,204);padding-left:1ex">





<div lang=3D"EN-US">
<div class=3D"gmail-m_-5826117022632123332WordSection1">
<p class=3D"MsoNormal">Dear WG:<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">This email closes the WG LC for draft-ietf-sfc-oam-f=
ramework-09. The chairs have concluded that there is enough support to move=
 this document forward for publication as an Informational RFC. Authors, pl=
ease confirm that any IPR you are
 aware of has been declared.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Thanks!<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Jim &amp; Joel<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b>From:</b> James Guichard <br>
<b>Sent:</b> Monday, July 08, 2019 9:15 AM<br>
<b>To:</b> <a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</=
a><br>
<b>Subject:</b> RE: WG Last Call draft-ietf-sfc-oam-framework-06<u></u><u><=
/u></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Dear WG:<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Before closing this WG Last Call, we (the chairs) wo=
uld like to better understand the level of interest and commitment the WG h=
as on progressing OAM work for SFC, starting with draft-ietf-sfc-oam-framew=
ork as a baseline. Please reply to
 this email with either support for the document, or non-support (we do not=
 need this document). Silence does not imply support or lack thereof so ple=
ase take time to state your opinions with a brief rational for support/non-=
support.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Thanks!<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Jim &amp; Joel<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b>From:</b> James Guichard <br>
<b>Sent:</b> Tuesday, May 28, 2019 10:30 AM<br>
<b>To:</b> <a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</=
a><br>
<b>Subject:</b> WG Last Call draft-ietf-sfc-oam-framework-06<u></u><u></u><=
/p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p><span style=3D"font-size:12pt;color:black">Dear WG:<u></u><u></u></span>=
</p>
<p><span style=3D"font-size:12pt;color:black">=C2=A0<u></u><u></u></span></=
p>
<p><span style=3D"font-size:12pt;color:black">This message starts a new two=
 week WG Last Call on advancing
</span><a href=3D"https://nam03.safelinks.protection.outlook.com/?url=3Dhtt=
ps%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-sfc-oam-framework%2F&amp=
;data=3D02%7C01%7Cjames.n.guichard%40futurewei.com%7Ce47e5eb13f224f18c46408=
d6e378b2f7%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C636946504868870205&=
amp;sdata=3DlkKvAgmKik7lkqGANQpnIvBRdbjKAqYtzTUdTfB9f3Y%3D&amp;reserved=3D0=
" target=3D"_blank"><span style=3D"font-size:12pt;color:rgb(5,99,193)">http=
s://datatracker.ietf.org/doc/draft-ietf-sfc-oam-framework/</span></a><span =
style=3D"font-size:12pt;color:black">
 for publication as an Informational RFC. <u></u><u></u></span></p>
<p><span style=3D"font-size:12pt;color:black">=C2=A0<u></u><u></u></span></=
p>
<p><span style=3D"font-size:12pt;color:black">Substantive comments and stat=
ements of support for publishing this document should be directed to the ma=
iling list. Editorial suggestions can be sent to the authors.=C2=A0 This la=
st call will end on 11th June 2019.<u></u><u></u></span></p>
<p><span style=3D"font-size:12pt;color:black">=C2=A0<u></u><u></u></span></=
p>
<p><span style=3D"font-size:12pt;color:black">Thanks!<u></u><u></u></span><=
/p>
<p><span style=3D"font-size:12pt;color:black">=C2=A0<u></u><u></u></span></=
p>
<p><span style=3D"font-size:12pt;color:black">Jim &amp; Joel<u></u><u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:black"><u></u>=
=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:black"><u></u>=
=C2=A0<u></u></span></p>
</div>
<div id=3D"gmail-m_-5826117022632123332Signature">
<p><span style=3D"font-size:12pt;color:black"><u></u>=C2=A0<u></u></span></=
p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt;color:black"><u></u>=
=C2=A0<u></u></span></p>
</div>
</div>
</div>
</div>

_______________________________________________<br>
sfc mailing list<br>
<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/sfc" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/listinfo/sfc</a><br>
</blockquote></div></div>

--0000000000002165230591b892dd--


From nobody Wed Sep 11 01:58:02 2019
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Subject: [sfc] I-D Action: draft-ietf-sfc-ioam-nsh-02.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Service Function Chaining WG of the IETF.

        Title           : Network Service Header (NSH) Encapsulation for In-situ OAM (IOAM) Data
        Authors         : Frank Brockners
                          Shwetha Bhandari
	Filename        : draft-ietf-sfc-ioam-nsh-02.txt
	Pages           : 9
	Date            : 2019-09-11

Abstract:
   In-situ Operations, Administration, and Maintenance (IOAM) records
   operational and telemetry information in the packet while the packet
   traverses a path between two points in the network.  This document
   outlines how IOAM data fields are encapsulated in the Network Service
   Header (NSH).


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-sfc-ioam-nsh/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-sfc-ioam-nsh-02
https://datatracker.ietf.org/doc/html/draft-ietf-sfc-ioam-nsh-02

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-sfc-ioam-nsh-02


Please note that it may take a couple of minutes from the time of submission
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Subject: [sfc] I-D Action: draft-ietf-sfc-proof-of-transit-03.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Service Function Chaining WG of the IETF.

        Title           : Proof of Transit
        Authors         : Frank Brockners
                          Shwetha Bhandari
                          Tal Mizrahi
                          Sashank Dara
                          Stephen Youell
	Filename        : draft-ietf-sfc-proof-of-transit-03.txt
	Pages           : 28
	Date            : 2019-09-11

Abstract:
   Several technologies such as Traffic Engineering (TE), Service
   Function Chaining (SFC), and policy based routing are used to steer
   traffic through a specific, user-defined path.  This document defines
   mechanisms to securely prove that traffic transited said defined
   path.  These mechanisms allow to securely verify whether, within a
   given path, all packets traversed all the nodes that they are
   supposed to visit.


The IETF datatracker status page for this draft is:
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There are also htmlized versions available at:
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https://datatracker.ietf.org/doc/html/draft-ietf-sfc-proof-of-transit-03

A diff from the previous version is available at:
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From: "Frank Brockners (fbrockne)" <fbrockne@cisco.com>
To: ALEJANDRO AGUADO MARTIN <alejandro.aguadomartin.ext@telefonica.com>, "Diego R. Lopez" <diego.r.lopez@telefonica.com>, "Carlos Pignataro (cpignata)" <cpignata@cisco.com>, "Shwetha Bhandari (shwethab)" <shwethab@cisco.com>, Tal Mizrahi <tal.mizrahi.phd@gmail.com>
CC: "a.aguadom@fi.upm.es" <a.aguadom@fi.upm.es>, "sfc@ietf.org" <sfc@ietf.org>
Thread-Topic: PoT review/comments
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Date: Wed, 11 Sep 2019 09:04:24 +0000
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Subject: Re: [sfc] PoT review/comments
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From: "Shwetha Bhandari (shwethab)" <shwethab@cisco.com>
To: "Frank Brockners (fbrockne)" <fbrockne@cisco.com>, ALEJANDRO AGUADO MARTIN <alejandro.aguadomartin.ext@telefonica.com>, "Diego R. Lopez" <diego.r.lopez@telefonica.com>, "Carlos Pignataro (cpignata)" <cpignata@cisco.com>, Tal Mizrahi <tal.mizrahi.phd@gmail.com>
CC: "a.aguadom@fi.upm.es" <a.aguadom@fi.upm.es>, "sfc@ietf.org" <sfc@ietf.org>
Thread-Topic: PoT review/comments
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Date: Thu, 12 Sep 2019 06:48:30 +0000
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--_000_3C6930475119444B9064363703855496ciscocom_--


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Date: Thu, 12 Sep 2019 09:39:40 +0200
From: Alejandro Aguado FI <a.aguadom@fi.upm.es>
To: "Diego R. Lopez" <diego.r.lopez@telefonica.com>,  "Carlos Pignataro (cpignata)" <cpignata@cisco.com>,  "Frank Brockners (fbrockne)" <fbrockne@cisco.com>, ALEJANDRO AGUADO MARTIN <alejandro.aguadomartin.ext@telefonica.com>,  "Shwetha Bhandari (shwethab)" <shwethab@cisco.com>, Tal Mizrahi <tal.mizrahi.phd@gmail.com>
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Subject: Re: [sfc] PoT review/comments
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Hi Shwetha,

Yes, I think it is a good idea. =46rom your points, the second one is a b=
it confusing to me... But I do not fully remember how the model was struc=
tured, so I need to revise the document.

Give me a day or two to explore again the model, and either we exchange f=
ew emails with proposals for the extension, or we can organise a quick ca=
ll during next week to close a final proposal to share with other contrib=
utors.

Thanks=21

Best,
Alejandro


El 12 de septiembre de 2019 a las 8:52:44, Shwetha Bhandari (shwethab) (s=
hwethab=40cisco.com) escribi=C3=B3:

Hi Alejandro, Diego,

=C2=A0

Since you added extension to do OPoT, should we extend the model in draft=
-ietf-sfc-proof-of-transit to enable OPoT and any parameters required for=
 it =C2=A0shared masks per link. If yes my proposal will be to:

Augment existing pot-profile with fields to Enable OPoT and a cipher sche=
me if needed.
Separate container in the model to define a map of (Node link/interface, =
mask) to distribute pair wise masks. =46or e.g. Node link/interface ident=
ifier can be UUID as defined in rfc8348 Or
Masks can be part of pot-profile.
=C2=A0

What do you think about revising the model with this=3F

=C2=A0

Thanks,

Shwetha

=C2=A0

=46rom: =22=46rank Brockners (fbrockne)=22 <fbrockne=40cisco.com>
Date: Wednesday, September 11, 2019 at 2:34 PM
To: ALEJANDRO AGUADO MARTIN <alejandro.aguadomartin.ext=40telefonica.com>=
, =22Diego R. Lopez=22 <diego.r.lopez=40telefonica.com>, Carlos Pignataro=
 <cpignata=40cisco.com>, Shwetha bhandari <shwethab=40cisco.com>, Tal Miz=
rahi <tal.mizrahi.phd=40gmail.com>
Cc: =22a.aguadom=40fi.upm.es=22 <a.aguadom=40fi.upm.es>, =22sfc=40ietf.or=
g=22 <sfc=40ietf.org>
Subject: RE: PoT review/comments

=C2=A0

Hi Alejandro,

=C2=A0

Thanks again for the review. Your comments have been integrated into draf=
t-ietf-sfc-proof-of-transit-03 which just got posted.

=C2=A0

Cheers, =46rank

=C2=A0

=46rom: =46rank Brockners (fbrockne) =20
Sent: Montag, 27. Mai 2019 18:18
To: ALEJANDRO AGUADO MARTIN <alejandro.aguadomartin.ext=40telefonica.com>=
; Diego R. Lopez <diego.r.lopez=40telefonica.com>; Carlos Pignataro (cpig=
nata) <cpignata=40cisco.com>; Shwetha Bhandari (shwethab) <shwethab=40cis=
co.com>; Tal Mizrahi <tal.mizrahi.phd=40gmail.com>
Cc: a.aguadom=40fi.upm.es; sfc=40ietf.org
Subject: RE: PoT review/comments

=C2=A0

Hi Alejandro,

=C2=A0

Many thanks for the comments =E2=80=93 and sorry for the delay =E2=80=93 =
unfortunately your email somehow got dropped from my todo list. Please se=
e inline=E2=80=A6

=C2=A0

(cc=E2=80=99ing the list as well).

=C2=A0

=46rom: ALEJANDRO AGUADO MARTIN <alejandro.aguadomartin.ext=40telefonica.=
com> =20
Sent: Montag, 15. April 2019 17:27
To: Diego R. Lopez <diego.r.lopez=40telefonica.com>; Carlos Pignataro (cp=
ignata) <cpignata=40cisco.com>; =46rank Brockners (fbrockne) <fbrockne=40=
cisco.com>; Shwetha Bhandari (shwethab) <shwethab=40cisco.com>; Tal Mizra=
hi <tal.mizrahi.phd=40gmail.com>
Cc: a.aguadom=40fi.upm.es
Subject: PoT review/comments

=C2=A0

Dear all,

=C2=A0

I gave a quick review to the PoT document. Some comments:

=C2=A0

- I read =E2=80=9CThe non-constant coefficients are used to generate the =
Lagrange Polynomial Constants (LPC).=E2=80=9D As far as I understood, the=
 points assigned to each node (Xi) are the ones used for generating the L=
PCi, aren=E2=80=99t they=3F

=E2=80=A6=46B: Good catch. The LPCs are of course computed using (x=5Fi, =
y=5Fi).

- If we go for including the YANG in the current document (which I agree)=
, parameters should be described before the yang definition, and maybe it=
 would be helpful to have the yang tree (see the current version attached=
).

=E2=80=A6=46B: Thanks. IMHO it makes sense to keep the YANG model in the =
current doc, given that the model and the description go hand in hand. We=
 can of course also include the yang tree to make reading easier. This is=
 consistent with other documents which specify YANG models.

- I include in the attached file few questions about naming of some param=
eters.

=C2=A0

=E2=80=A6=46B:
- naming =46=5Fi(x=5Fi, y=5Fi) =E2=80=93 I agree that a better name could=
 be used. The only potential concern would be that the open source implem=
entation in OpenDaylight uses this naming =E2=80=93 changing it might lea=
d to confusion. We can start with adding a comment to make things clearer=
.

=C2=A0

- secret key =E2=80=93 this is the constant part of the first polynomial =
which serves as the secret =E2=80=93 and which is re-retrieved. Again, we=
 can update the description to make things clearer.

=C2=A0

- size of the random number: This is unrelated to OPOT. The random number=
 is to uniquely identify a packet. There is a trade-off between the size =
of the random number and how often you need to re-key your system. At hig=
h speeds, the random number =E2=80=93 which identifies a particular packe=
t =E2=80=93 is used up quite quickly if it is only 32-bit wide. See secti=
on 4 =C2=A0https://tools.ietf.org/html/draft-ietf-sfc-proof-of-transit-02=
=23section-4

=C2=A0

- number of profiles: =46or a deployment which is expected to renew keys =
every now and then (e.g. you run with 32-bit random numbers at reasonably=
 high speeds), you need at least 2 profiles =E2=80=93 an active one and o=
ne that you can activate once you run out of random numbers (which is wha=
t the encapsulating node would decide).

- I have checked some of the existing YANG files within the IET=46 to see=
 in which it would be helpful to include. =46rom the (not so) old Open=46=
low, I assume that one match is necessary (for identify the iOAM/PoT head=
er) whilst the source node can use any existing match field to identify p=
ackets where to apply the PoT scheme. In terms of actions, I would say th=
at two may be required: for any node, an update-pot is necessary, while t=
he verifier would need a verify-pot type of action, that would ideally ei=
ther remove the header or drop the packet if fails (I do not know if you =
are thinking in more complex scenarios).

=C2=A0

=E2=80=A6=46B: =46rom an O=46 perspective, that sounds feasible. That sai=
d, we probably want to avoid making the spec specific to a technology lik=
e O=46, hence would suggest that we don=E2=80=99t specify such a behavior=
 as part of this document.

=C2=A0

- =46or this last point, I have seen the definitions within draft-asechou=
d-rtgwg-qos-model-08, where matched could map (if I am not wrong) to clas=
sifiers/filters, and actions to actions. I send you the models in a zip f=
ile. In this sense the model to be defined in the PoT shall be an augment=
 of the models defined in that document. I have not done a very deep revi=
sion on the model, but I think it could fit there. If you have check this=
 or other models, let me know so I could also help.

=C2=A0

=E2=80=A6=46B: Per my note above: In order to keep POT generic and not li=
nk it to a particular classification mechanism, I=E2=80=99d prefer to kee=
p the classification question as out of scope for the current document. T=
hat way it can also apply to technologies which come with their own way t=
o classify =E2=80=93 and which might fully decouple the tunneling aspects=
 from the classification aspects.

=C2=A0

Thanks a lot and sorry for such long email.

=C2=A0

..=46B: Thanks again for all your comments. We=E2=80=99ll get them includ=
ed in the next revision.

=C2=A0

Cheers, =46rank

=C2=A0

=C2=A0

=C2=A0

Best,

Alejandro

=C2=A0

=C2=A0

=C2=A0

=C2=A0


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<html><head><style>body=7Bfont-family:Helvetica,Arial;font-size:13px=7D</=
style></head><body><div style=3D=22font-family:Helvetica,Arial;font-size:=
13px; ; =22>Hi Shwetha,</div><div style=3D=22font-family:Helvetica,Arial;=
font-size:13px; ; =22><br></div><div style=3D=22font-family:Helvetica,Ari=
al;font-size:13px; ; =22>Yes, I think it is a good idea. =46rom your poin=
ts, the second one is a bit confusing to me... But I do not fully remembe=
r how the model was structured, so I need to revise the document.</div><d=
iv style=3D=22font-family:Helvetica,Arial;font-size:13px; ; =22><br></div=
><div style=3D=22font-family:Helvetica,Arial;font-size:13px; ; =22>Give m=
e a day or two to explore again the model, and either we exchange few ema=
ils with proposals for the extension, or we can organise a quick call dur=
ing next week to close a final proposal to share with other contributors.=
</div><div style=3D=22font-family:Helvetica,Arial;font-size:13px; ; =22><=
br></div><div style=3D=22font-family:Helvetica,Arial;font-size:13px; ; =22=
>Thanks=21</div><div style=3D=22font-family:Helvetica,Arial;font-size:13p=
x; ; =22><br></div><div style=3D=22font-family:Helvetica,Arial;font-size:=
13px; ; =22>Best,</div><div style=3D=22font-family:Helvetica,Arial;font-s=
ize:13px; ; =22>Alejandro</div> <br> <div class=3D=22gmail=5Fsignature=22=
></div> <br><p class=3D=22airmail=5Fon=22>El 12 de septiembre de 2019 a l=
as 8:52:44, Shwetha Bhandari (shwethab) (<a href=3D=22mailto:shwethab=40c=
isco.com=22>shwethab=40cisco.com</a>) escribi=C3=B3:</p> <blockquote type=
=3D=22cite=22 class=3D=22clean=5Fbq=22><span><div lang=3D=22EN-US=22 link=
=3D=22blue=22 vlink=3D=22purple=22><div></div><div>



<=21--=5Bif =21mso=5D><=21=5Bendif=5D--><=21--=5Bif gte mso 9=5D><xml>
<o:shapedefaults v:ext=3D=22edit=22 spidmax=3D=221026=22 />
</xml><=21=5Bendif=5D--><=21--=5Bif gte mso 9=5D><xml>
<o:shapelayout v:ext=3D=22edit=22>
<o:idmap v:ext=3D=22edit=22 data=3D=221=22 />
</o:shapelayout></xml><=21=5Bendif=5D-->


<div class=3D=22WordSection1=22>
<p class=3D=22MsoNormal=22><span style=3D=22font-family:Courier=22>Hi Ale=
jandro, Diego,<o:p></o:p></span></p>
<p class=3D=22MsoNormal=22><span style=3D=22font-family:Courier=22><o:p>&=
nbsp;</o:p></span></p>
<p class=3D=22MsoNormal=22><span style=3D=22font-family:Courier=22>Since =
you added extension to do OPoT, should we extend the model in draft-ietf-=
sfc-proof-of-transit to enable OPoT and any parameters required for it &n=
bsp;shared masks per link. If yes my proposal will be to:<o:p></o:p></spa=
n></p>
<ol style=3D=22margin-top:0in=22 start=3D=221=22 type=3D=221=22>
<li class=3D=22MsoListParagraph=22 style=3D=22margin-left:0in;mso-list:l0=
 level1 lfo1=22><span style=3D=22font-family:Courier=22>Augment existing =
pot-profile with fields to Enable OPoT and a cipher scheme if needed.<o:p=
></o:p></span></li><li class=3D=22MsoListParagraph=22 style=3D=22margin-l=
eft:0in;mso-list:l0 level1 lfo1=22><span style=3D=22font-family:Courier=22=
>Separate container in the model to define a map of (Node link/interface,=
 mask) to distribute pair wise masks. =46or e.g. Node link/interface iden=
tifier
 can be UUID as defined in rfc8348 Or<o:p></o:p></span></li><li class=3D=22=
MsoListParagraph=22 style=3D=22margin-left:0in;mso-list:l0 level1 lfo1=22=
><span style=3D=22font-family:Courier=22>Masks can be part of pot-profile=
.<o:p></o:p></span></li></ol>
<p class=3D=22MsoNormal=22><span style=3D=22font-family:Courier=22><o:p>&=
nbsp;</o:p></span></p>
<p class=3D=22MsoNormal=22><span style=3D=22font-family:Courier=22>What d=
o you think about revising the model with this=3F<o:p></o:p></span></p>
<p class=3D=22MsoNormal=22><span style=3D=22font-family:Courier=22><o:p>&=
nbsp;</o:p></span></p>
<p class=3D=22MsoNormal=22><span style=3D=22font-family:Courier=22>Thanks=
,<o:p></o:p></span></p>
<p class=3D=22MsoNormal=22><span style=3D=22font-family:Courier=22>Shweth=
a<o:p></o:p></span></p>
<p class=3D=22MsoNormal=22><span style=3D=22font-family:Courier=22><o:p>&=
nbsp;</o:p></span></p>
<p class=3D=22MsoNormal=22><span style=3D=22font-family:Courier=22><o:p><=
/o:p></span></p>
<div style=3D=22border:none;border-top:solid =23B5C4D=46 1.0pt;padding:3.=
0pt 0in 0in 0in=22>
<p class=3D=22MsoNormal=22><b><span style=3D=22font-size:12.0pt;color:bla=
ck=22>=46rom: </span></b><span style=3D=22font-size:12.0pt;color:black=22=
>=22=46rank Brockners (fbrockne)=22 &lt;fbrockne=40cisco.com&gt;<br>
<b>Date: </b>Wednesday, September 11, 2019 at 2:34 PM<br>
<b>To: </b>ALEJANDRO AGUADO MARTIN &lt;alejandro.aguadomartin.ext=40telef=
onica.com&gt;, =22Diego R. Lopez=22 &lt;diego.r.lopez=40telefonica.com&gt=
;, Carlos Pignataro &lt;cpignata=40cisco.com&gt;, Shwetha bhandari &lt;sh=
wethab=40cisco.com&gt;, Tal Mizrahi &lt;tal.mizrahi.phd=40gmail.com&gt;<b=
r>
<b>Cc: </b>=22a.aguadom=40fi.upm.es=22 &lt;a.aguadom=40fi.upm.es&gt;, =22=
sfc=40ietf.org=22 &lt;sfc=40ietf.org&gt;<br>
<b>Subject: </b>RE: PoT review/comments<o:p></o:p></span></p>
</div>
<div>
<p class=3D=22MsoNormal=22><o:p>&nbsp;</o:p></p>
</div>
<p class=3D=22MsoNormal=22>Hi Alejandro,<o:p></o:p></p>
<p class=3D=22MsoNormal=22>&nbsp;<o:p></o:p></p>
<p class=3D=22MsoNormal=22>Thanks again for the review. Your comments hav=
e been integrated into draft-ietf-sfc-proof-of-transit-03 which just got =
posted.<o:p></o:p></p>
<p class=3D=22MsoNormal=22>&nbsp;<o:p></o:p></p>
<p class=3D=22MsoNormal=22>Cheers, =46rank<o:p></o:p></p>
<p class=3D=22MsoNormal=22>&nbsp;<o:p></o:p></p>
<div style=3D=22border:none;border-left:solid blue 1.5pt;padding:0in 0in =
0in 4.0pt=22>
<div>
<div style=3D=22border:none;border-top:solid =23E1E1E1 1.0pt;padding:3.0p=
t 0in 0in 0in=22>
<p class=3D=22MsoNormal=22><b>=46rom:</b> =46rank Brockners (fbrockne) <b=
r>
<b>Sent:</b> Montag, 27. Mai 2019 18:18<br>
<b>To:</b> ALEJANDRO AGUADO MARTIN &lt;alejandro.aguadomartin.ext=40telef=
onica.com&gt;; Diego R. Lopez &lt;diego.r.lopez=40telefonica.com&gt;; Car=
los Pignataro (cpignata) &lt;cpignata=40cisco.com&gt;; Shwetha Bhandari (=
shwethab) &lt;shwethab=40cisco.com&gt;; Tal Mizrahi &lt;tal.mizrahi.phd=40=
gmail.com&gt;<br>
<b>Cc:</b> a.aguadom=40fi.upm.es; sfc=40ietf.org<br>
<b>Subject:</b> RE: PoT review/comments<o:p></o:p></p>
</div>
</div>
<p class=3D=22MsoNormal=22>&nbsp;<o:p></o:p></p>
<p class=3D=22MsoNormal=22>Hi Alejandro,<o:p></o:p></p>
<p class=3D=22MsoNormal=22>&nbsp;<o:p></o:p></p>
<p class=3D=22MsoNormal=22>Many thanks for the comments =E2=80=93 and sor=
ry for the delay =E2=80=93 unfortunately your email somehow got dropped f=
rom my todo list. Please see inline=E2=80=A6<o:p></o:p></p>
<p class=3D=22MsoNormal=22>&nbsp;<o:p></o:p></p>
<p class=3D=22MsoNormal=22>(cc=E2=80=99ing the list as well).<o:p></o:p><=
/p>
<p class=3D=22MsoNormal=22>&nbsp;<o:p></o:p></p>
<div style=3D=22border:none;border-left:solid blue 1.5pt;padding:0in 0in =
0in 4.0pt=22>
<div>
<div style=3D=22border:none;border-top:solid =23E1E1E1 1.0pt;padding:3.0p=
t 0in 0in 0in=22>
<p class=3D=22MsoNormal=22><b>=46rom:</b> ALEJANDRO AGUADO MARTIN &lt;<a =
href=3D=22mailto:alejandro.aguadomartin.ext=40telefonica.com=22>alejandro=
.aguadomartin.ext=40telefonica.com</a>&gt;
<br>
<b>Sent:</b> Montag, 15. April 2019 17:27<br>
<b>To:</b> Diego R. Lopez &lt;<a href=3D=22mailto:diego.r.lopez=40telefon=
ica.com=22>diego.r.lopez=40telefonica.com</a>&gt;; Carlos Pignataro (cpig=
nata) &lt;<a href=3D=22mailto:cpignata=40cisco.com=22>cpignata=40cisco.co=
m</a>&gt;; =46rank Brockners (fbrockne) &lt;<a href=3D=22mailto:fbrockne=40=
cisco.com=22>fbrockne=40cisco.com</a>&gt;;
 Shwetha Bhandari (shwethab) &lt;<a href=3D=22mailto:shwethab=40cisco.com=
=22>shwethab=40cisco.com</a>&gt;; Tal Mizrahi &lt;<a href=3D=22mailto:tal=
.mizrahi.phd=40gmail.com=22>tal.mizrahi.phd=40gmail.com</a>&gt;<br>
<b>Cc:</b> <a href=3D=22mailto:a.aguadom=40fi.upm.es=22>a.aguadom=40fi.up=
m.es</a><br>
<b>Subject:</b> PoT review/comments<o:p></o:p></p>
</div>
</div>
<p class=3D=22MsoNormal=22>&nbsp;<o:p></o:p></p>
<div>
<div>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:10.0pt;font-family:=
Helvetica=22>Dear all,</span><o:p></o:p></p>
</div>
<div>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:10.0pt;font-family:=
Helvetica=22>&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:10.0pt;font-family:=
Helvetica=22>I gave a quick review to the PoT document. Some comments:</s=
pan><o:p></o:p></p>
</div>
<div>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:10.0pt;font-family:=
Helvetica=22>&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:10.0pt;font-family:=
Helvetica=22>- I read =E2=80=9CThe non-constant coefficients are used to =
generate the Lagrange Polynomial Constants (LPC).=E2=80=9D As far as I un=
derstood, the points assigned to each node (Xi) are the ones used
 for generating the LPCi, aren=E2=80=99t they=3F</span><o:p></o:p></p>
<p class=3D=22MsoNormal=22 style=3D=22margin-bottom:12.0pt=22><b><i>=E2=80=
=A6=46B: Good catch. The LPCs are of course computed using (x=5Fi, y=5Fi)=
.</i></b><o:p></o:p></p>
</div>
<div>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:10.0pt;font-family:=
Helvetica=22>- If we go for including the YANG in the current document (w=
hich I agree), parameters should be described before the yang definition,=
 and maybe it would be helpful to have the yang tree
 (see the current version attached).</span><o:p></o:p></p>
<p class=3D=22MsoNormal=22 style=3D=22margin-bottom:12.0pt=22><b><i>=E2=80=
=A6=46B: Thanks. IMHO it makes sense to keep the YANG model in the curren=
t doc, given that the model and the description go hand in hand. We can o=
f course also include the yang tree to make reading easier.
 This is consistent with other documents which specify YANG models.</i></=
b><o:p></o:p></p>
</div>
<div>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:10.0pt;font-family:=
Helvetica=22>- I include in the attached file few questions about naming =
of some parameters.</span><o:p></o:p></p>
<p class=3D=22MsoNormal=22><b><i>&nbsp;</i></b><o:p></o:p></p>
<p class=3D=22MsoNormal=22><b><i>=E2=80=A6=46B:<br>
- naming =46=5Fi(x=5Fi, y=5Fi) =E2=80=93 I agree that a better name could=
 be used. The only potential concern would be that the open source implem=
entation in OpenDaylight uses this naming =E2=80=93 changing it might lea=
d to confusion. We can start with adding a comment to make things
 clearer.</i></b><o:p></o:p></p>
<p class=3D=22MsoNormal=22><b><i>&nbsp;</i></b><o:p></o:p></p>
<p class=3D=22MsoNormal=22><b><i>- secret key =E2=80=93 this is the const=
ant part of the first polynomial which serves as the secret =E2=80=93 and=
 which is re-retrieved. Again, we can update the description to make thin=
gs clearer.</i></b><o:p></o:p></p>
<p class=3D=22MsoNormal=22><b><i>&nbsp;</i></b><o:p></o:p></p>
<p class=3D=22MsoNormal=22><b><i>- size of the random number: This is unr=
elated to OPOT. The random number is to uniquely identify a packet. There=
 is a trade-off between the size of the random number and how often you n=
eed to re-key your system. At high speeds, the
 random number =E2=80=93 which identifies a particular packet =E2=80=93 i=
s used up quite quickly if it is only 32-bit wide. See section 4 &nbsp;</=
i></b><a href=3D=22https://tools.ietf.org/html/draft-ietf-sfc-proof-of-tr=
ansit-02=23section-4=22>https://tools.ietf.org/html/draft-ietf-sfc-proof-=
of-transit-02=23section-4</a><o:p></o:p></p>
<p class=3D=22MsoNormal=22><b><i>&nbsp;</i></b><o:p></o:p></p>
<p class=3D=22MsoNormal=22 style=3D=22margin-bottom:12.0pt=22><b><i>- num=
ber of profiles: =46or a deployment which is expected to renew keys every=
 now and then (e.g. you run with 32-bit random numbers at reasonably high=
 speeds), you need at least 2 profiles =E2=80=93 an active one
 and one that you can activate once you run out of random numbers (which =
is what the encapsulating node would decide).
</i></b><o:p></o:p></p>
</div>
<div>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:10.0pt;font-family:=
Helvetica=22>- I have checked some of the existing YANG files within the =
IET=46 to see in which it would be helpful to include. =46rom the (not so=
) old Open=46low, I assume that one match is necessary (for
 identify the iOAM/PoT header) whilst the source node can use any existin=
g match field to identify packets where to apply the PoT scheme. In terms=
 of actions, I would say that two may be required: for any node, an updat=
e-pot is necessary, while the verifier
 would need a verify-pot type of action, that would ideally either remove=
 the header or drop the packet if fails (I do not know if you are thinkin=
g in more complex scenarios).</span><o:p></o:p></p>
<p class=3D=22MsoNormal=22><b><i>&nbsp;</i></b><o:p></o:p></p>
<p class=3D=22MsoNormal=22><b><i>=E2=80=A6=46B: =46rom an O=46 perspectiv=
e, that sounds feasible. That said, we probably want to avoid making the =
spec specific to a technology like O=46, hence would suggest that we don=E2=
=80=99t specify such a behavior as part of this document.</i></b><o:p></o=
:p></p>
<p class=3D=22MsoNormal=22><b><i>&nbsp;</i></b><o:p></o:p></p>
</div>
<div>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:10.0pt;font-family:=
Helvetica=22>- =46or this last point, I have seen the definitions within =
draft-asechoud-rtgwg-qos-model-08, where matched could map (if I am not w=
rong) to classifiers/filters, and actions to actions.
 I send you the models in a zip file. In this sense the model to be defin=
ed in the PoT shall be an augment of the models defined in that document.=
 I have not done a very deep revision on the model, but I think it could =
fit there. If you have check this or other
 models, let me know so I could also help.</span><o:p></o:p></p>
<p class=3D=22MsoNormal=22><b><i>&nbsp;</i></b><o:p></o:p></p>
<p class=3D=22MsoNormal=22><b><i>=E2=80=A6=46B: Per my note above: In ord=
er to keep POT generic and not link it to a particular classification mec=
hanism, I=E2=80=99d prefer to keep the classification question as out of =
scope for the current document. That way it can also apply to
 technologies which come with their own way to classify =E2=80=93 and whi=
ch might fully decouple the tunneling aspects from the classification asp=
ects.
</i></b><o:p></o:p></p>
</div>
<div>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:10.0pt;font-family:=
Helvetica=22>&nbsp;</span><o:p></o:p></p>
</div>
<div>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:10.0pt;font-family:=
Helvetica=22>Thanks a lot and sorry for such long email.</span><o:p></o:p=
></p>
</div>
<div>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:10.0pt;font-family:=
Helvetica=22>&nbsp;</span><o:p></o:p></p>
<p class=3D=22MsoNormal=22><b><i>..=46B: Thanks again for all your commen=
ts. We=E2=80=99ll get them included in the next revision.
</i></b><o:p></o:p></p>
<p class=3D=22MsoNormal=22><b><i>&nbsp;</i></b><o:p></o:p></p>
<p class=3D=22MsoNormal=22><b><i>Cheers, =46rank</i></b><o:p></o:p></p>
<p class=3D=22MsoNormal=22>&nbsp;<o:p></o:p></p>
<p class=3D=22MsoNormal=22>&nbsp;<o:p></o:p></p>
<p class=3D=22MsoNormal=22>&nbsp;<o:p></o:p></p>
</div>
<div>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:10.0pt;font-family:=
Helvetica=22>Best,</span><o:p></o:p></p>
</div>
<div>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:10.0pt;font-family:=
Helvetica=22>Alejandro</span><o:p></o:p></p>
</div>
<div>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:10.0pt;font-family:=
Helvetica=22>&nbsp;</span><o:p></o:p></p>
</div>
</div>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:10.0pt;font-family:=
Helvetica=22>&nbsp;</span><o:p></o:p></p>
<p class=3D=22MsoNormal=22><span style=3D=22font-size:10.0pt;font-family:=
Helvetica=22>&nbsp;</span><o:p></o:p></p>
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Subject: [sfc] I-D Action: draft-ietf-sfc-oam-framework-11.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Service Function Chaining WG of the IETF.

        Title           : Service Function Chaining (SFC) Operations, Administration and Maintenance (OAM) Framework
        Authors         : Sam K. Aldrin
                          Carlos Pignataro
                          Nagendra Kumar
                          Ram Krishnan
                          Anoop Ghanwani
	Filename        : draft-ietf-sfc-oam-framework-11.txt
	Pages           : 21
	Date            : 2019-09-19

Abstract:
   This document provides a reference framework for Operations,
   Administration and Maintenance (OAM) for Service Function Chaining
   (SFC).



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-sfc-oam-framework/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-sfc-oam-framework-11
https://datatracker.ietf.org/doc/html/draft-ietf-sfc-oam-framework-11

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-sfc-oam-framework-11


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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--_000_0A7EAE17D6C44B3B89584106B09C43EBciscocom_--


From nobody Mon Sep 23 07:45:20 2019
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From: IETF Secretariat <ietf-ipr@ietf.org>
To: <draft-ietf-sfc-proof-of-transit@ietf.org>
Cc: ipr-announce@ietf.org, sfc@ietf.org
Subject: IPR Disclosure Telefónica SA's Statement about IPR related to draft-ietf-sfc-proof-of-transit
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Dear Frank Brockners, Shwetha Bhandari, Tal Mizrahi, Sashank Dara, Stephen Youell:


An IPR disclosure that pertains to your Internet-Draft entitled "Proof of
Transit" (draft-ietf-sfc-proof-of-transit) was submitted to the IETF
Secretariat on  and has been posted on the "IETF Page of Intellectual
Property Rights Disclosures" (https://datatracker.ietf.org/ipr/3751/). The
title of the IPR disclosure is "Telefónica SA's Statement about IPR related
to draft-ietf-sfc-proof-of-transit"


Thank you

IETF Secretariat


From nobody Wed Sep 25 01:30:44 2019
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In-Reply-To: <0A7EAE17-D6C4-4B3B-8958-4106B09C43EB@cisco.com>
From: Tal Mizrahi <tal.mizrahi.phd@gmail.com>
Date: Wed, 25 Sep 2019 11:30:26 +0300
Message-ID: <CABUE3Xnxm_74NnNSX148gDppQdRtSArp78POXWCgdV38NbRG-g@mail.gmail.com>
To: "Nagendra Kumar Nainar (naikumar)" <naikumar@cisco.com>
Cc: "draft-ietf-sfc-oam-framework@ietf.org" <draft-ietf-sfc-oam-framework@ietf.org>,  Service Function Chaining IETF list <sfc@ietf.org>, "sfc-chairs@ietf.org" <sfc-chairs@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/sfc/ko7rcLf9HpDyb863UFcoBO6SQlA>
Subject: Re: [sfc] Shepherd Review of draft-ietf-sfc-oam-framework-10
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Hi Nagendra, authors,

Many thanks for addressing the comments and posting the updated draft.

We are still waiting for two remaining authors to respond to the IPR call:

https://mailarchive.ietf.org/arch/msg/sfc/b5FHtp2IB-8MQLEMCZkOwnN5Aqk

Once we complete the IPR call we can proceed with the publication process.

Thanks,
Tal.

On Thu, Sep 19, 2019 at 11:31 PM Nagendra Kumar Nainar (naikumar) <
naikumar@cisco.com> wrote:

> Hi Tal,
>
>
>
> Thank you again for the review and comments. We have submitted a new
> revision addressing the comments.
>
>
>
> A new version of I-D, draft-ietf-sfc-oam-framework-11.txt
>
> has been successfully submitted by Nagendra Kumar and posted to the
>
> IETF repository.
>
>
>
> Name:                  draft-ietf-sfc-oam-framework
>
> Revision:              11
>
> Title:                      Service Function Chaining (SFC) Operations,
> Administration and Maintenance (OAM) Framework
>
> Document date:               2019-09-19
>
> Group:                  sfc
>
> Pages:                   21
>
> URL:
> https://www.ietf.org/internet-drafts/draft-ietf-sfc-oam-framework-11.txt
>
> Status:
> https://datatracker.ietf.org/doc/draft-ietf-sfc-oam-framework/
>
> Htmlized:
> https://tools.ietf.org/html/draft-ietf-sfc-oam-framework-11
>
> Htmlized:
> https://datatracker.ietf.org/doc/html/draft-ietf-sfc-oam-framework
>
> Diff:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-sfc-oam-framework-11
>
>
>
>
>
> Thanks,
>
> Nagendra
>
>
>
> *From: *Nagendra Kumar <naikumar@cisco.com>
> *Date: *Tuesday, September 3, 2019 at 10:29 AM
> *To: *Tal Mizrahi <tal.mizrahi.phd@gmail.com>, "
> draft-ietf-sfc-oam-framework@ietf.org" <
> draft-ietf-sfc-oam-framework@ietf.org>, Service Function Chaining IETF
> list <sfc@ietf.org>, "sfc-chairs@ietf.org" <sfc-chairs@ietf.org>
> *Subject: *Re: [sfc] Shepherd Review of draft-ietf-sfc-oam-framework-10
> *Resent-From: *<alias-bounces@ietf.org>
> *Resent-To: *<aldrin.ietf@gmail.com>, <cpignata@cisco.com>, Nagendra
> Kumar <naikumar@cisco.com>, <ramkri123@gmail.com>, <anoop@alumni.duke.edu>
> *Resent-Date: *Tuesday, September 3, 2019 at 10:28 AM
>
>
>
> Hi Tal,
>
>
>
> Thank you for the comments. We will address the same and will submit a new
> version.
>
>
>
> Regards,
>
> Nagendra
>
>
>
> *From: *sfc <sfc-bounces@ietf.org> on behalf of Tal Mizrahi <
> tal.mizrahi.phd@gmail.com>
> *Date: *Monday, September 2, 2019 at 1:14 AM
> *To: *"draft-ietf-sfc-oam-framework@ietf.org" <
> draft-ietf-sfc-oam-framework@ietf.org>, Service Function Chaining IETF
> list <sfc@ietf.org>, "sfc-chairs@ietf.org" <sfc-chairs@ietf.org>
> *Subject: *[sfc] Shepherd Review of draft-ietf-sfc-oam-framework-10
>
>
>
> Hi,
>
>
>
> I am the assigned shepherd of draft-ietf-sfc-oam-framework-10.
>
> I believe the document is almost ready for publication.
> I have a few (mostly editorial) comments, as follows.
> It would be great if the authors could post a new version that addresses
> these comments, and then we can proceed with the publication process.
>
>    - RFC 7498 is an informative reference, but the introduction says that
>    the reader is expected to be familiar with it. I suggest to change either
>    one or the other.
>    - Is there a reason why RFC 8459 is a normative reference? I suggest
>    to make it informative.
>    - Regarding IOAM (Section 6.4.3) - the section describes the
>    proof-of-transit draft, but should also mention
>    - draft-ietf-sfc-ioam-nsh.
>    - Section 1 (Introduction) lists the content in the rest of the
>    sections, but does not mention Section 6, which suggests candidate tools.
>    - "with the same" ==> "this terminology"
>    - "The link layer, which is dependent upon the physical technology
>    used." ==> "The link layer, which is tightly coupled with the physical
>    technology used."
>    - "depicts a sample example" ==> "depicts an example"
>    - In Tables 3 and 4, it is not clear why some of the columns are
>    separated by "|", and some are separated by "+".
>    - "Tables 4" ==> "Table 4"
>    - "for fast failure detection" - I suggest to remove the word fast, as
>    BFD is not necessarily fast.
>    - Section 6..4 says that "This section describes the applicability of
>    some of the available toolsets in the service layer.", however, section
>    "6.4.4 SFC Traceroute" describes a tool that was defined in an expired
>    individual submission. I suggest to either remove section 6.4.4., or to
>    explicitly mention that this draft has expired, and that a new tool can be
>    defined along the lines of this proposal.
>    - Section 3 describes three OAM components (SF, SFC, Classifier), but
>    then Section 5 and Section 7 (Table 3, Table 4) do not refer to these three
>    components, but to Underlay, Overlay, SF and SFC. Please be consistent, so
>    that Section 5-7 refer to the same components that were defined in Section
>    3.
>    - Moreover, in Section 3, for each of the first two components (SF and
>    SFC) there is a discussion about availability and performance measurement.
>    However, for the third component (Classifier), there is no explicit
>    discussion about availability and performance measurement. I suggest to add
>    this missing discussion (even if these functions are not required, it is
>    still important to mention this).
>
> Cheers,
>
> Tal.
>

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

<div dir=3D"ltr">Hi Nagendra, authors,<div><br></div><div>Many thanks for a=
ddressing the comments and posting the updated draft.</div><div><br></div><=
div>We are still waiting for two remaining authors to respond to the IPR ca=
ll:</div><div><br></div><div><a href=3D"https://mailarchive.ietf.org/arch/m=
sg/sfc/b5FHtp2IB-8MQLEMCZkOwnN5Aqk">https://mailarchive.ietf.org/arch/msg/s=
fc/b5FHtp2IB-8MQLEMCZkOwnN5Aqk</a>=C2=A0=C2=A0<br></div><div><br></div><div=
>Once we complete the IPR call we can proceed with the publication process.=
</div><div><br></div><div>Thanks,</div><div>Tal.</div></div><br><div class=
=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Sep 19, 2019=
 at 11:31 PM Nagendra Kumar Nainar (naikumar) &lt;<a href=3D"mailto:naikuma=
r@cisco.com">naikumar@cisco.com</a>&gt; wrote:<br></div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex">





<div lang=3D"EN-US">
<div class=3D"gmail-m_-8859109229304578265WordSection1">
<p class=3D"MsoNormal">Hi Tal,<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Thank you again for the review and comments. We have=
 submitted a new revision addressing the comments.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-family:-webkit-standard;color:bl=
ack">A new version of I-D, draft-ietf-sfc-oam-framework-11.txt</span><span =
style=3D"font-family:-webkit-standard;color:black"><u></u><u></u></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-family:-webkit-standard;color:bl=
ack">has been successfully submitted by Nagendra Kumar and posted to the<u>=
</u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:-webkit-standard;color:bl=
ack">IETF repository.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:-webkit-standard;color:bl=
ack"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:-webkit-standard;color:bl=
ack">Name:<span class=3D"gmail-m_-8859109229304578265apple-tab-span">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0
</span>draft-ietf-sfc-oam-framework<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:-webkit-standard;color:bl=
ack">Revision:<span class=3D"gmail-m_-8859109229304578265apple-tab-span">=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0
</span>11<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:-webkit-standard;color:bl=
ack">Title:<span class=3D"gmail-m_-8859109229304578265apple-tab-span">=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span>Service Function Chaining (SFC) Operations, Administration and Maint=
enance (OAM) Framework<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:-webkit-standard;color:bl=
ack">Document date:<span class=3D"gmail-m_-8859109229304578265apple-tab-spa=
n">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0
</span>2019-09-19<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:-webkit-standard;color:bl=
ack">Group:<span class=3D"gmail-m_-8859109229304578265apple-tab-span">=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0
</span>sfc<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:-webkit-standard;color:bl=
ack">Pages:<span class=3D"gmail-m_-8859109229304578265apple-tab-span">=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span>21<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:-webkit-standard;color:bl=
ack">URL:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0<a href=3D"https://www.ietf.org/internet-drafts/draft-ietf-sfc-oam-fr=
amework-11.txt" target=3D"_blank">https://www.ietf.org/internet-drafts/draf=
t-ietf-sfc-oam-framework-11.txt</a><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:-webkit-standard;color:bl=
ack">Status:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<span class=3D"=
gmail-m_-8859109229304578265apple-converted-space">=C2=A0</span><a href=3D"=
https://datatracker.ietf.org/doc/draft-ietf-sfc-oam-framework/" target=3D"_=
blank">https://datatracker.ietf.org/doc/draft-ietf-sfc-oam-framework/</a><u=
></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:-webkit-standard;color:bl=
ack">Htmlized:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<span class=3D"gmail-m_-8=
859109229304578265apple-converted-space">=C2=A0</span><a href=3D"https://to=
ols.ietf.org/html/draft-ietf-sfc-oam-framework-11" target=3D"_blank">https:=
//tools.ietf.org/html/draft-ietf-sfc-oam-framework-11</a><u></u><u></u></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-family:-webkit-standard;color:bl=
ack">Htmlized:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<span class=3D"gmail-m_-8=
859109229304578265apple-converted-space">=C2=A0</span><a href=3D"https://da=
tatracker.ietf.org/doc/html/draft-ietf-sfc-oam-framework" target=3D"_blank"=
>https://datatracker.ietf.org/doc/html/draft-ietf-sfc-oam-framework</a><u><=
/u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:-webkit-standard;color:bl=
ack">Diff:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<span=
 class=3D"gmail-m_-8859109229304578265apple-converted-space">=C2=A0</span><=
a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-sfc-oam-framework-=
11" target=3D"_blank">https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-sfc-oa=
m-framework-11</a><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:-webkit-standard;color:bl=
ack"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Thanks,<u></u><u></u></p>
<p class=3D"MsoNormal">Nagendra<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(181,196,223);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:12pt;color:black">From: =
</span></b><span style=3D"font-size:12pt;color:black">Nagendra Kumar &lt;<a=
 href=3D"mailto:naikumar@cisco.com" target=3D"_blank">naikumar@cisco.com</a=
>&gt;<br>
<b>Date: </b>Tuesday, September 3, 2019 at 10:29 AM<br>
<b>To: </b>Tal Mizrahi &lt;<a href=3D"mailto:tal.mizrahi.phd@gmail.com" tar=
get=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;, &quot;<a href=3D"mailto:d=
raft-ietf-sfc-oam-framework@ietf.org" target=3D"_blank">draft-ietf-sfc-oam-=
framework@ietf.org</a>&quot; &lt;<a href=3D"mailto:draft-ietf-sfc-oam-frame=
work@ietf.org" target=3D"_blank">draft-ietf-sfc-oam-framework@ietf.org</a>&=
gt;, Service Function Chaining IETF list &lt;<a href=3D"mailto:sfc@ietf.org=
" target=3D"_blank">sfc@ietf.org</a>&gt;, &quot;<a href=3D"mailto:sfc-chair=
s@ietf.org" target=3D"_blank">sfc-chairs@ietf.org</a>&quot; &lt;<a href=3D"=
mailto:sfc-chairs@ietf.org" target=3D"_blank">sfc-chairs@ietf.org</a>&gt;<b=
r>
<b>Subject: </b>Re: [sfc] Shepherd Review of draft-ietf-sfc-oam-framework-1=
0<br>
<b>Resent-From: </b>&lt;<a href=3D"mailto:alias-bounces@ietf.org" target=3D=
"_blank">alias-bounces@ietf.org</a>&gt;<br>
<b>Resent-To: </b>&lt;<a href=3D"mailto:aldrin.ietf@gmail.com" target=3D"_b=
lank">aldrin.ietf@gmail.com</a>&gt;, &lt;<a href=3D"mailto:cpignata@cisco.c=
om" target=3D"_blank">cpignata@cisco.com</a>&gt;, Nagendra Kumar &lt;<a hre=
f=3D"mailto:naikumar@cisco.com" target=3D"_blank">naikumar@cisco.com</a>&gt=
;, &lt;<a href=3D"mailto:ramkri123@gmail.com" target=3D"_blank">ramkri123@g=
mail.com</a>&gt;, &lt;<a href=3D"mailto:anoop@alumni.duke.edu" target=3D"_b=
lank">anoop@alumni.duke.edu</a>&gt;<br>
<b>Resent-Date: </b>Tuesday, September 3, 2019 at 10:28 AM<u></u><u></u></s=
pan></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<p class=3D"MsoNormal">Hi Tal,<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Thank you for the comments. We will address the same=
 and will submit a new version.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Regards,<u></u><u></u></p>
<p class=3D"MsoNormal">Nagendra<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(181,196,223);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:12pt;color:black">From: =
</span></b><span style=3D"font-size:12pt;color:black">sfc &lt;<a href=3D"ma=
ilto:sfc-bounces@ietf.org" target=3D"_blank">sfc-bounces@ietf.org</a>&gt; o=
n behalf of Tal Mizrahi &lt;<a href=3D"mailto:tal.mizrahi.phd@gmail.com" ta=
rget=3D"_blank">tal.mizrahi.phd@gmail.com</a>&gt;<br>
<b>Date: </b>Monday, September 2, 2019 at 1:14 AM<br>
<b>To: </b>&quot;<a href=3D"mailto:draft-ietf-sfc-oam-framework@ietf.org" t=
arget=3D"_blank">draft-ietf-sfc-oam-framework@ietf.org</a>&quot; &lt;<a hre=
f=3D"mailto:draft-ietf-sfc-oam-framework@ietf.org" target=3D"_blank">draft-=
ietf-sfc-oam-framework@ietf.org</a>&gt;, Service Function Chaining IETF lis=
t &lt;<a href=3D"mailto:sfc@ietf.org" target=3D"_blank">sfc@ietf.org</a>&gt=
;, &quot;<a href=3D"mailto:sfc-chairs@ietf.org" target=3D"_blank">sfc-chair=
s@ietf.org</a>&quot; &lt;<a href=3D"mailto:sfc-chairs@ietf.org" target=3D"_=
blank">sfc-chairs@ietf.org</a>&gt;<br>
<b>Subject: </b>[sfc] Shepherd Review of draft-ietf-sfc-oam-framework-10</s=
pan><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;">=
Hi,</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;">=
I am the assigned shepherd of=C2=A0draft-ietf-sfc-oam-framework-10.</span><=
u></u><u></u></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><span style=3D"font-fam=
ily:&quot;Courier New&quot;">I believe the document is almost ready for pub=
lication.
<br>
I have a few (mostly editorial) comments, as follows.<br>
It would be great if the authors could post a new version that addresses th=
ese comments, and then we can proceed with the publication process.</span><=
u></u><u></u></p>
<ul type=3D"disc">
<li class=3D"MsoNormal">
<span style=3D"font-family:&quot;Courier New&quot;">RFC 7498 is an informat=
ive reference, but the introduction says that the reader is expected to be =
familiar with it. I suggest to change either one or the other.</span><u></u=
><u></u></li><li class=3D"MsoNormal">
<span style=3D"font-family:&quot;Courier New&quot;">Is there a reason why R=
FC 8459 is a normative reference? I suggest to make it informative.</span><=
u></u><u></u></li><li class=3D"MsoNormal">
<span style=3D"font-family:&quot;Courier New&quot;">Regarding IOAM (Section=
 6.4.3) - the section describes the proof-of-transit draft, but should also=
 mention
</span><u></u><u></u></li><li class=3D"MsoNormal">
<span style=3D"font-family:&quot;Courier New&quot;">draft-ietf-sfc-ioam-nsh=
.</span><u></u><u></u></li><li class=3D"MsoNormal">
<span style=3D"font-family:&quot;Courier New&quot;">Section 1 (Introduction=
) lists the content in the rest of the sections, but does not mention Secti=
on 6, which suggests candidate tools.</span><u></u><u></u></li><li class=3D=
"MsoNormal">
<span style=3D"font-family:&quot;Courier New&quot;">&quot;with the same&quo=
t; =3D=3D&gt; &quot;this terminology&quot;</span><u></u><u></u></li><li cla=
ss=3D"MsoNormal">
<span style=3D"font-family:&quot;Courier New&quot;">&quot;The link layer, w=
hich is dependent upon the physical technology used.&quot; =3D=3D&gt; &quot=
;The link layer, which is tightly coupled with the physical technology used=
.&quot;</span><u></u><u></u></li><li class=3D"MsoNormal">
<span style=3D"font-family:&quot;Courier New&quot;">&quot;depicts a sample =
example&quot; =3D=3D&gt; &quot;depicts an example&quot;</span><u></u><u></u=
></li><li class=3D"MsoNormal">
<span style=3D"font-family:&quot;Courier New&quot;">In Tables 3 and 4, it i=
s not clear why some of the columns are separated by &quot;|&quot;, and som=
e are separated by &quot;+&quot;.</span><u></u><u></u></li><li class=3D"Mso=
Normal">
<span style=3D"font-family:&quot;Courier New&quot;">&quot;Tables 4&quot; =
=3D=3D&gt; &quot;Table 4&quot;</span><u></u><u></u></li><li class=3D"MsoNor=
mal">
<span style=3D"font-family:&quot;Courier New&quot;">&quot;for fast failure =
detection&quot; - I suggest to remove the word fast, as BFD is not necessar=
ily fast.</span><u></u><u></u></li><li class=3D"MsoNormal">
<span style=3D"font-family:&quot;Courier New&quot;">Section 6..4 says that =
&quot;This section describes the applicability of some of the available too=
lsets in the service layer.&quot;, however, section &quot;6.4.4 SFC Tracero=
ute&quot; describes a tool that was defined in an expired individual
 submission. I suggest to either remove section 6.4.4., or to explicitly me=
ntion that this draft has expired, and that a new tool can be defined along=
 the lines of this proposal.</span><u></u><u></u></li><li class=3D"MsoNorma=
l">
<span style=3D"font-family:&quot;Courier New&quot;">Section 3 describes thr=
ee OAM components (SF, SFC, Classifier), but then Section 5 and Section 7 (=
Table 3, Table 4) do not refer to these three components, but to Underlay, =
Overlay, SF and SFC. Please be consistent, so
 that Section 5-7 refer to the same components that were defined in Section=
 3.</span><u></u><u></u></li><li class=3D"MsoNormal">
<span style=3D"font-family:&quot;Courier New&quot;">Moreover, in Section 3,=
 for each of the first two components (SF and SFC) there is a discussion ab=
out availability and performance measurement. However, for the third compon=
ent (Classifier), there is no explicit discussion
 about availability and performance measurement. I suggest to add this miss=
ing discussion (even if these functions are not required, it is still impor=
tant to mention this).</span><u></u><u></u></li></ul>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;">=
Cheers,</span><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;">=
Tal.</span><u></u><u></u></p>
</div>
</div>
</div>
</div>

</blockquote></div>

--000000000000ab7ec305935c7745--


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We are excited to announce that the ACM SIGCOMM Symposium on SDN 
Research (SOSR) 2020 will be co-located with the Open Compute Project 
(OCP) Global Summit.

New this year, in addition to traditional research papers, we are 
soliciting "Experience and Challenge" papers that provide a 
retrospective of the practical impacts of SDN deployments and outline 
next steps, challenges, and radical ideas for SDNs.

* Abstract registration: Nov 8, 2019
* Submission deadline: Nov 15, 2019
* More information: https://conferences.sigcomm.org/sosr/2020/calls.html

Submit your best papers!
-- 
Soudeh Ghorbani
Assistant Professor
Department of Computer Science
Johns Hopkins University
soudeh.net

