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From: "Gengxuesong (Geng Xuesong)" <gengxuesong@huawei.com>
To: James Guichard <james.n.guichard@futurewei.com>, "spring@ietf.org" <spring@ietf.org>
CC: "spring-chairs@ietf.org" <spring-chairs@ietf.org>
Thread-Topic: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Date: Mon, 1 Feb 2021 10:03:44 +0000
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Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Hi WG,

I support WG adoption of this document, which gives good instructions about=
 how to use resoucer-aware SIDs to build SR based VTN.
While in the next version, maybe it is better to add more specifications ab=
out VTN control plane functions and protocol extensions.  (There is some te=
xt in section 3 of the existing version, which I think is not sufficient)

Best
Xuesong

From: spring [mailto:spring-bounces@ietf.org] On Behalf Of James Guichard
Sent: Wednesday, January 27, 2021 7:47 PM
To: spring@ietf.org
Cc: spring-chairs@ietf.org
Subject: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vp=
n

Dear WG:

This message starts a 2 week WG adoption call for https://datatracker.ietf.=
org/doc/draft-dong-spring-sr-for-enhanced-vpn/ ending February 10th 2021.

After review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, plea=
se state this explicitly. This gives the chairs an indication of the energy=
 level of people in the working group willing to work on this document. Ple=
ase also provide comments/reasons for your support (or lack thereof) as thi=
s is a stronger way to indicate your (non) support as this is not a vote.

Thanks!

Jim, Bruno & Joel




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<p class=3D"MsoNormal" style=3D"line-height:150%"><span lang=3D"EN-US" styl=
e=3D"font-size:10.5pt;line-height:150%;color:#1F497D">Hi WG,<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"line-height:150%"><span lang=3D"EN-US" styl=
e=3D"font-size:10.5pt;line-height:150%;color:#1F497D"><o:p>&nbsp;</o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"line-height:150%"><span lang=3D"EN-US" styl=
e=3D"font-size:10.5pt;line-height:150%;color:#1F497D">I support WG adoption=
 of this document, which gives good instructions about how to use resoucer-=
aware SIDs to build SR based VTN.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"line-height:150%"><span lang=3D"EN-US" styl=
e=3D"font-size:10.5pt;line-height:150%;color:#1F497D">While in the next ver=
sion, maybe it is better to add more specifications about VTN control plane=
 functions and protocol extensions. &nbsp;(There
 is some text in section 3 of the existing version, which I think is not su=
fficient)<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"line-height:150%"><span lang=3D"EN-US" styl=
e=3D"font-size:10.5pt;line-height:150%;color:#1F497D"><o:p>&nbsp;</o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"line-height:150%"><span lang=3D"EN-US" styl=
e=3D"font-size:10.5pt;line-height:150%;color:#1F497D">Best<o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"line-height:150%"><span lang=3D"EN-US" styl=
e=3D"font-size:10.5pt;line-height:150%;color:#1F497D">Xuesong<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><span lang=
=3D"EN-US"> spring [mailto:spring-bounces@ietf.org]
<b>On Behalf Of </b>James Guichard<br>
<b>Sent:</b> Wednesday, January 27, 2021 7:47 PM<br>
<b>To:</b> spring@ietf.org<br>
<b>Cc:</b> spring-chairs@ietf.org<br>
<b>Subject:</b> [spring] WG Adoption Call for draft-dong-spring-sr-for-enha=
nced-vpn<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear WG:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">This message starts a 2 week WG=
 adoption call for
<a href=3D"https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanc=
ed-vpn/">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">After review of the document pl=
ease indicate support (or not) for WG adoption to the mailing list and if y=
ou are willing to work on the document, please state this explicitly. This =
gives the chairs an indication of the
 energy level of people in the working group willing to work on this docume=
nt. Please also provide comments/reasons for your support (or lack thereof)=
 as this is a stronger way to indicate your (non) support as this is not a =
vote.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Jim, Bruno &amp; Joel<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
</body>
</html>

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From: Tarek Saad <tsaad@juniper.net>
To: James Guichard <james.n.guichard@futurewei.com>, "spring@ietf.org" <spring@ietf.org>
CC: "spring-chairs@ietf.org" <spring-chairs@ietf.org>
Thread-Topic: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Hi WG,
I support the adoption as the contributor. It has been three years since th=
e first version of the draft was proposed. After long-term work, the soluti=
on is mature and well-accepted. The draft is well written and ready for ado=
ption.


Best Regards,
Zhenbin (Robin)



From: spring [mailto:spring-bounces@ietf.org] On Behalf Of James Guichard
Sent: Wednesday, January 27, 2021 7:47 PM
To: spring@ietf.org<mailto:spring@ietf.org>
Cc: spring-chairs@ietf.org<mailto:spring-chairs@ietf.org>
Subject: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vp=
n

Dear WG:

This message starts a 2 week WG adoption call for https://datatracker.ietf.=
org/doc/draft-dong-spring-sr-for-enhanced-vpn/ ending February 10th 2021.

After review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, plea=
se state this explicitly. This gives the chairs an indication of the energy=
 level of people in the working group willing to work on this document. Ple=
ase also provide comments/reasons for your support (or lack thereof) as thi=
s is a stronger way to indicate your (non) support as this is not a vote.

Thanks!

Jim, Bruno & Joel




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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Hi WG,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">I support the adoption as the contributor. It has been three year=
s since the first version of the draft was proposed. After long-term work, =
the solution is mature and well-accepted.
 The draft is well written and ready for adoption.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Best Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zhenbin (Robin)<o:p></o:p></span></p>
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:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><span lang=
=3D"EN-US"> spring [<a href=3D"mailto:spring-bounces@ietf.org">mailto:sprin=
g-bounces@ietf.org</a>]
<b>On Behalf Of </b>James Guichard<br>
<b>Sent:</b> Wednesday, January 27, 2021 7:47 PM<br>
<b>To:</b> <a href=3D"mailto:spring@ietf.org">spring@ietf.org</a><br>
<b>Cc:</b> <a href=3D"mailto:spring-chairs@ietf.org">spring-chairs@ietf.org=
</a><br>
<b>Subject:</b> [spring] WG Adoption Call for draft-dong-spring-sr-for-enha=
nced-vpn<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear WG:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">This message starts a 2 week WG=
 adoption call for
<a href=3D"https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanc=
ed-vpn/">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">After review of the document pl=
ease indicate support (or not) for WG adoption to the mailing list and if y=
ou are willing to work on the document, please state this explicitly. This =
gives the chairs an indication of the
 energy level of people in the working group willing to work on this docume=
nt. Please also provide comments/reasons for your support (or lack thereof)=
 as this is a stronger way to indicate your (non) support as this is not a =
vote.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Jim, Bruno &amp; Joel<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
</body>
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From: "Dongjie (Jimmy)" <jie.dong@huawei.com>
To: "Gengxuesong (Geng Xuesong)" <gengxuesong@huawei.com>, James Guichard <james.n.guichard@futurewei.com>, "spring@ietf.org" <spring@ietf.org>
CC: "spring-chairs@ietf.org" <spring-chairs@ietf.org>
Thread-Topic: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Date: Tue, 2 Feb 2021 09:29:55 +0000
Message-ID: <5e48d08ec40841778b64416849daf638@huawei.com>
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Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Hi Xuesong,

Thanks for your support and comment.

As this document mainly describes the SR data plane mechanisms and the proc=
edures of building SR based VTNs, the descriptions about the control plane =
are brief, and the details are left to the control plane drafts. That said,=
 we could add some more descriptions about the related control plane functi=
ons in next version.

Best regards,
Jie

From: Gengxuesong (Geng Xuesong)
Sent: Monday, February 1, 2021 6:04 PM
To: James Guichard <james.n.guichard@futurewei.com>; spring@ietf.org
Cc: spring-chairs@ietf.org
Subject: RE: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn

Hi WG,

I support WG adoption of this document, which gives good instructions about=
 how to use resoucer-aware SIDs to build SR based VTN.
While in the next version, maybe it is better to add more specifications ab=
out VTN control plane functions and protocol extensions.  (There is some te=
xt in section 3 of the existing version, which I think is not sufficient)

Best
Xuesong

From: spring [mailto:spring-bounces@ietf.org] On Behalf Of James Guichard
Sent: Wednesday, January 27, 2021 7:47 PM
To: spring@ietf.org<mailto:spring@ietf.org>
Cc: spring-chairs@ietf.org<mailto:spring-chairs@ietf.org>
Subject: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vp=
n

Dear WG:

This message starts a 2 week WG adoption call for https://datatracker.ietf.=
org/doc/draft-dong-spring-sr-for-enhanced-vpn/ ending February 10th 2021.

After review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, plea=
se state this explicitly. This gives the chairs an indication of the energy=
 level of people in the working group willing to work on this document. Ple=
ase also provide comments/reasons for your support (or lack thereof) as thi=
s is a stronger way to indicate your (non) support as this is not a vote.

Thanks!

Jim, Bruno & Joel




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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Hi Xuesong,
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Thanks for your support and comment.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">As this document mainly describes the SR data plane mechanisms an=
d the procedures of building SR based VTNs, the descriptions about the cont=
rol plane are brief, and the details are
 left to the control plane drafts. That said, we could add some more descri=
ptions about the related control plane functions in next version.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Best regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Jie<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><span lang=
=3D"EN-US"> Gengxuesong (Geng Xuesong)
<br>
<b>Sent:</b> Monday, February 1, 2021 6:04 PM<br>
<b>To:</b> James Guichard &lt;james.n.guichard@futurewei.com&gt;; spring@ie=
tf.org<br>
<b>Cc:</b> spring-chairs@ietf.org<br>
<b>Subject:</b> RE: WG Adoption Call for draft-dong-spring-sr-for-enhanced-=
vpn<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"line-height:150%"><span lang=3D"EN-US" styl=
e=3D"font-size:10.5pt;line-height:150%;color:#1F497D">Hi WG,<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"line-height:150%"><span lang=3D"EN-US" styl=
e=3D"font-size:10.5pt;line-height:150%;color:#1F497D"><o:p>&nbsp;</o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"line-height:150%"><span lang=3D"EN-US" styl=
e=3D"font-size:10.5pt;line-height:150%;color:#1F497D">I support WG adoption=
 of this document, which gives good instructions about how to use resoucer-=
aware SIDs to build SR based VTN.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"line-height:150%"><span lang=3D"EN-US" styl=
e=3D"font-size:10.5pt;line-height:150%;color:#1F497D">While in the next ver=
sion, maybe it is better to add more specifications about VTN control plane=
 functions and protocol extensions. &nbsp;(There
 is some text in section 3 of the existing version, which I think is not su=
fficient)<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"line-height:150%"><span lang=3D"EN-US" styl=
e=3D"font-size:10.5pt;line-height:150%;color:#1F497D"><o:p>&nbsp;</o:p></sp=
an></p>
<p class=3D"MsoNormal" style=3D"line-height:150%"><span lang=3D"EN-US" styl=
e=3D"font-size:10.5pt;line-height:150%;color:#1F497D">Best<o:p></o:p></span=
></p>
<p class=3D"MsoNormal" style=3D"line-height:150%"><span lang=3D"EN-US" styl=
e=3D"font-size:10.5pt;line-height:150%;color:#1F497D">Xuesong<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><span lang=
=3D"EN-US"> spring [<a href=3D"mailto:spring-bounces@ietf.org">mailto:sprin=
g-bounces@ietf.org</a>]
<b>On Behalf Of </b>James Guichard<br>
<b>Sent:</b> Wednesday, January 27, 2021 7:47 PM<br>
<b>To:</b> <a href=3D"mailto:spring@ietf.org">spring@ietf.org</a><br>
<b>Cc:</b> <a href=3D"mailto:spring-chairs@ietf.org">spring-chairs@ietf.org=
</a><br>
<b>Subject:</b> [spring] WG Adoption Call for draft-dong-spring-sr-for-enha=
nced-vpn<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear WG:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">This message starts a 2 week WG=
 adoption call for
<a href=3D"https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanc=
ed-vpn/">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">After review of the document pl=
ease indicate support (or not) for WG adoption to the mailing list and if y=
ou are willing to work on the document, please state this explicitly. This =
gives the chairs an indication of the
 energy level of people in the working group willing to work on this docume=
nt. Please also provide comments/reasons for your support (or lack thereof)=
 as this is a stronger way to indicate your (non) support as this is not a =
vote.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Jim, Bruno &amp; Joel<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
</div>
</body>
</html>

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From: Robert Raszuk <robert@raszuk.net>
Date: Tue, 2 Feb 2021 10:36:26 +0100
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To: Tarek Saad <tsaad@juniper.net>
Cc: Lou Berger <lberger@labn.net>, James Guichard <james.n.guichard@futurewei.com>,  Adrian Farrel <adrian@olddog.co.uk>, SPRING WG <spring@ietf.org>,  "spring-chairs@ietf.org" <spring-chairs@ietf.org>
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Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Hi Terek,

Sure that MPLS supports diff-serve from day one. No one ever stated that it
does not. In fact if you go back to one of the messages I explicitly stated
this already and even encourage its use to the problem at hand.

But the label inferred class of service or such carried in EXP bits is
really nothing close to per individual LSP resource reservations some
imagine is taking place.

So by all means using QoS in MPLS networks - both MPLS TE or LDP is a good
thing. It is just from practical point (limited number of classes) not per
customer or per LSP-TE reservation of any sort. Another problem arises that
to do it well you must use central controller which would be controlling
all ingress points to your network for this class of service. It is
important to also note that this class of service must have priority over
*any* other traffic type - including control plane itself. Needless to say
you also need to inspect and rewrite if needed any other non
compliant traffic attempting to also be placed in this type of PQ.

I have a feeling that some people in the industry think that they can bring
back TDM paradigm into connectionless IP transport. This is easy to do in
SDH/SONET layers ... not above it when all traffic is squeezed into shared
space containers. Sure at most we could say F/C class goes in/out first at
each hop, but that's about it.

Best,
R.


On Tue, Feb 2, 2021 at 5:48 AM Tarek Saad <tsaad@juniper.net> wrote:

> Hi Robert,
>
>
>
> RFC3270 talks about two models for reserving resources for LSPs in a MPLS
> Diffserv network (namely E-LSP and L-LSP). While former is the more popul=
ar
> implementation amongst vendors, implementations of the latter exist for
> some vendors =E2=80=93 i.e. L-LSP which will do per LSP resource allocati=
on.
>
> I agree in non DS-TE deployments, most RSVP-TE implementations I worked
> with will just do control plane reservations/validation for LSP path
> placement. However, for RSVP DS-TE deployments, there is still resources
> provisioned per class in the dataplane =E2=80=93 this is to ensure the
> differentiated treatment for class traffic on shared links.
>
>
>
> Along those lines, draft-bestbar-teas-ns-packet extends this and proposes
> ability to apply QoS treatment on slice aggregate traffic that traverses =
a
> shared resource/link. The packet will need to be identified as belonging =
to
> the slice aggregate. For this, draft-bestbar-teas-ns-packet proposes that=
 a
> separate field can be carried in the packet so it can be used to identify
> the slice aggregate the packet belongs to.
>
>
>
> Regards,
>
> Tarek
>
>
>
>
>
>
>
> On 1/31/21, 12:24 PM, "spring on behalf of Robert Raszuk" <
> spring-bounces@ietf.org on behalf of robert@raszuk.net> wrote:
>
>
>
> Lou,
>
>
>
> If you mean ingress policing that this is not what I was referring to -
> however for most if not all shipping RSVP-TE aka MPLS-TE implementation I
> am not aware of any per TE-LSP data plane resource allocation in the date
> plane. Keen on being corrected, but with facts and proof not with claims
> and statements.
>
>
>
> If there are any please kindly enumerate what resources are being reserve=
d
> and how (ie. what RE/RP tells LC to "reserve"). No need to reveal the
> implementation name(s), but if you provide a detailed pointer it would
> be helpful.
>
>
>
> Cheers,
>
> R.
>
>
>
>
>
> On Sun, Jan 31, 2021 at 6:10 PM Lou Berger <lberger@labn.net> wrote:
>
> Robert,
>
> I'm amazed that after all these decades of RSVP and rsvp-te
> implementations there are those who still state that there is no resource
> allocation or management in the data plane. The RFCs are quiet on the top=
ic
> of how reservations are managed/enforced and it is up to the vendor to
> choose what to implement and the user to decide what features are importa=
nt
> to them, i.e., that they are willing to pay for.
>
> While it is certainly true that there is a well-known vendor that doesn't
> do much in the data plane and there are some who wish that this was the
> only choice, there are certainly TE implementations that do manage/alloca=
te
> resources in the data plane to match reservations established via RSVP or
> more modern sdn-te techniques.
>
> Lou
> ------------------------------
>
> On January 31, 2021 8:08:31 AM Robert Raszuk <robert@raszuk.net> wrote:
>
> Hi Adrian,
>
>
>
> > To your 3209 comments: I believe that **some** implementations have
> pushed the =E2=80=9Creservation=E2=80=9D
>
> > into the data plane so that in-network policing is performed to conform
> data flows with reservations or,
>
>
>
> Sure thing that any decent TE implementation and deployment must provide
> ingress policing into TE-LSPs. But this is ingress policing not reservati=
on
> of actual data plane resources which explicitly Jie explained as the
> intention here.
>
>
>
> Best,
> R.
>
>
>
>
>
> > On Sun, Jan 31, 2021 at 1:06 PM Adrian Farrel <adrian@olddog.co.uk>
> wrote:
>
> Yeah, thanks Robert.
>
>
>
> Actually, removing the comparison with other protocols is probably wise.
> This is a document describing how to do stuff with SR. In that context we
> don=E2=80=99t need to talk about the benefits or limitations of other pro=
tocols.
>
>
>
> To your 3209 comments: I believe that **some** implementations have
> pushed the =E2=80=9Creservation=E2=80=9D into the data plane so that in-n=
etwork policing is
> performed to conform data flows with reservations or, at least, ensure th=
at
> the parts of any flow that exceed reservation are treated as best effort.
> But this is an aside to the discussion of the draft at hand.
>
>
>
> I think that the document should note that the SR control plane does not
> currently have the capability to make reservations (in the control plane)
> at the network nodes. This can be achieved using a central controller to
> keep tabs on all resource accounting, and it could use a southbound
> interface to install that information in the (management/control parts of
> the) network nodes.
>
>
>
> Cheers,
>
> Adrian
>
>
>
> *From:* Robert Raszuk <robert@raszuk.net>
> *Sent:* 31 January 2021 00:46
> *To:* Adrian Farrel <adrian@olddog.co.uk>
> *Cc:* James Guichard <james.n.guichard@futurewei.com>; SPRING WG <
> spring@ietf.org>; spring-chairs@ietf.org
> *Subject:* Re: [spring] WG Adoption Call for
> draft-dong-spring-sr-for-enhanced-vpn
>
>
>
> Hi Adrian,
>
>
>
> Just to make sure my point was correctly understood ... I am not
> questioning if either data plane or control plane resource reservations
> should or should not be done for SR.
>
>
>
> What I am questioning is that the draft says:
>
>
>
>    When
>    compared with RSVP-TE [RFC3209], SR currently does not have the
>    capability to reserve network resources or identify different sets of
>    network resources reserved for different customers and/or services.
>
>
>
> The crux of the matter is that RFC3209 DOES NOT reserve anything in the
> data plane of any network element while this spec clearly intends to.
> RSVP-TE keeps all reservations in control plane counters only.
> Constrained based path computation/selection happens based on those
> control plane information. (Yes nearly 20 years after this feature shippe=
d
> I am still meeting people who believe otherwise :).
>
>
>
> So to start I recommend we remove any reference to RSVP-TE as this is
> purely not applicable to what this document is trying to accomplish.
>
>
>
> I admit I did not follow all the recent advancements in TEAS nor in DETNE=
T
> as far as actually reserving data plane resources in data plane for some
> traffic types. If authors want to build a solution with that - by all mea=
ns
> green light and full speed ahead - market will decided - especially when =
it
> will really understand the cost :) But let's make sure the document is
> crystal clear on what building blocks it is talking about.
>
>
>
> Best,
> R.
>
>
>
>
>
> On Sat, Jan 30, 2021 at 11:20 PM Adrian Farrel <adrian@olddog.co.uk>
> wrote:
>
> Thanks, Jim,
>
>
>
> I=E2=80=99ve been following the enhanced VPN work in TEAS and I see it as=
 a key
> piece of the network slicing work.
>
>
>
> It=E2=80=99s time that we had some protocol solutions that serve the VPN
> framework, and this is a suitable starting point. I like that it is not
> specifying additional protocol widgets but has looked at what we already
> have and is pointing up ways to use those tools to deliver new function.
>
>
>
> I see Robert=E2=80=99s point about the resource reservation aspects of tr=
affic
> engineering applied to an SR network, but this is not an insurmountable
> problem. The question might be asked, =E2=80=9CWhy would you want to do t=
hat?=E2=80=9D but
> that is a question that (as Yakov would have said) the market can decide.
> It seems that there are a couple of vendors and a couple of operators who
> have an interest.
>
>
>
> So I think we should adopt this draft and see whether we can turn it into
> something that has great utility.
>
>
>
> Cheers,
>
> Adrian
>
>
>
> *From:* spring <spring-bounces@ietf.org> *On Behalf Of *James Guichard
> *Sent:* 27 January 2021 11:47
> *To:* spring@ietf.org
> *Cc:* spring-chairs@ietf.org
> *Subject:* [spring] WG Adoption Call for
> draft-dong-spring-sr-for-enhanced-vpn
>
>
>
> Dear WG:
>
>
>
> This message starts a 2 week WG adoption call for
> https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/
> ending February 10th 2021.
>
>
>
> After review of the document please indicate support (or not) for WG
> adoption to the mailing list and if you are willing to work on the
> document, please state this explicitly. This gives the chairs an indicati=
on
> of the energy level of people in the working group willing to work on thi=
s
> document. Please also provide comments/reasons for your support (or lack
> thereof) as this is a stronger way to indicate your (non) support as this
> is not a vote.
>
>
>
> Thanks!
>
>
>
> Jim, Bruno & Joel
>
>
>
>
>
>
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
>
>
> Juniper Business Use Only
>

--000000000000f2e95805ba5734e4
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Terek,<div><br></div><div>Sure that MPLS supports diff-=
serve from day one. No one ever stated that it does not. In fact if you go =
back to one of the messages I explicitly=C2=A0stated this already and even =
encourage=C2=A0its=C2=A0use to the problem at hand.=C2=A0</div><div><br></d=
iv><div>But the label inferred=C2=A0class of service or such carried in EXP=
 bits is really nothing=C2=A0close to per individual LSP resource reservati=
ons some imagine is taking place.=C2=A0</div><div><br></div><div>So by all =
means using QoS in MPLS networks - both MPLS TE or LDP is a good thing. It =
is just from practical=C2=A0point (limited number of classes) not per custo=
mer or per LSP-TE reservation of any sort. Another problem arises that to d=
o it well you must use central controller which would be controlling all in=
gress points to your network for this class of service. It is important to =
also note that this class of service=C2=A0must have priority over *any* oth=
er traffic type - including control plane itself. Needless to say you also =
need to inspect and rewrite if needed any other non compliant=C2=A0traffic =
attempting to also be placed in this type of PQ.=C2=A0</div><div><br></div>=
<div>I have a feeling that some people in the industry think that they can =
bring back TDM paradigm into connectionless IP transport. This is easy to d=
o in SDH/SONET layers ... not above it when all traffic is squeezed into sh=
ared space containers. Sure at most we could say F/C class goes in/out firs=
t at each hop, but that&#39;s about it.=C2=A0</div><div><br></div><div>Best=
,</div><div>R.</div><div><br></div></div><br><div class=3D"gmail_quote"><di=
v dir=3D"ltr" class=3D"gmail_attr">On Tue, Feb 2, 2021 at 5:48 AM Tarek Saa=
d &lt;<a href=3D"mailto:tsaad@juniper.net">tsaad@juniper.net</a>&gt; wrote:=
<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8=
ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-US" style=3D"overflow-wrap: break-word;">
<div class=3D"gmail-m_2955810621377252688WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:12pt">Hi Robert,<u></u><u><=
/u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt">RFC3270 talks about t=
wo models for reserving resources for LSPs in a MPLS Diffserv network (name=
ly E-LSP and L-LSP). While former is the more popular implementation amongs=
t vendors, implementations of the
 latter exist for some vendors =E2=80=93 i.e. L-LSP which will do per LSP r=
esource allocation.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt">I agree in non DS-TE =
deployments, most RSVP-TE implementations I worked with will just do contro=
l plane reservations/validation for LSP path placement. However, for RSVP D=
S-TE deployments, there is still resources
 provisioned per class in the dataplane =E2=80=93 this is to ensure the dif=
ferentiated treatment for class traffic on shared links.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt">Along those lines, dr=
aft-bestbar-teas-ns-packet extends this and proposes ability to apply QoS t=
reatment on slice aggregate traffic that traverses a shared resource/link. =
The packet will need to be identified
 as belonging to the slice aggregate. For this, draft-bestbar-teas-ns-packe=
t proposes that a separate field can be carried in the packet so it can be =
used to identify the slice aggregate the packet belongs to.<u></u><u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt">Regards,<u></u><u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt">Tarek<u></u><u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12pt"><u></u>=C2=A0<u></u><=
/span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">On 1/31/21, 12:24 PM, &q=
uot;spring on behalf of Robert Raszuk&quot; &lt;<a href=3D"mailto:spring-bo=
unces@ietf.org" target=3D"_blank">spring-bounces@ietf.org</a> on behalf of
<a href=3D"mailto:robert@raszuk.net" target=3D"_blank">robert@raszuk.net</a=
>&gt; wrote:<u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">Lou,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">If you mean ingress poli=
cing that this is not what I was referring=C2=A0to - however for most if no=
t all shipping RSVP-TE aka MPLS-TE implementation I am not aware of any per=
 TE-LSP data plane resource allocation in
 the date plane. Keen on being corrected, but with facts and proof not with=
 claims and statements.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">If there are any please =
kindly enumerate=C2=A0what resources=C2=A0are being reserved and how (ie. w=
hat RE/RP tells LC to &quot;reserve&quot;). No need to reveal the implement=
ation name(s), but if you provide a detailed pointer it would
 be=C2=A0helpful.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">Cheers,<u></u><u></u></p=
>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">R.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><u></u>=C2=A0<u></u></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">On Sun, Jan 31, 2021 at =
6:10 PM Lou Berger &lt;<a href=3D"mailto:lberger@labn.net" target=3D"_blank=
">lberger@labn.net</a>&gt; wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4=
.8pt;margin-right:0in">
<div>
<div>
<div>
<p style=3D"margin-right:0in;margin-bottom:12pt;margin-left:0.5in">
<span style=3D"color:black">Robert,<u></u><u></u></span></p>
<p style=3D"margin-right:0in;margin-bottom:12pt;margin-left:0.5in">
<span style=3D"color:black">I&#39;m amazed that after all these decades of =
RSVP and rsvp-te implementations there are those who still state that there=
 is no resource allocation or management in the data plane. The RFCs are qu=
iet on the topic of how reservations are
 managed/enforced and it is up to the vendor to choose what to implement an=
d the user to decide what features are important to them, i.e., that they a=
re willing to pay for.<u></u><u></u></span></p>
<p style=3D"margin-right:0in;margin-bottom:12pt;margin-left:0.5in">
<span style=3D"color:black">While it is certainly true that there is a well=
-known vendor that doesn&#39;t do much in the data plane and there are some=
 who wish that this was the only choice, there are certainly TE implementat=
ions that do manage/allocate resources
 in the data plane to match reservations established via RSVP or more moder=
n sdn-te techniques.=C2=A0
<u></u><u></u></span></p>
<p style=3D"margin-right:0in;margin-bottom:12pt;margin-left:0.5in">
<span style=3D"color:black">Lou<u></u><u></u></span></p>
</div>
<div>
<div class=3D"MsoNormal" align=3D"center" style=3D"margin-left:0.5in;text-a=
lign:center">
<span style=3D"color:black">
<hr size=3D"0" width=3D"100%" align=3D"center">
</span></div>
<p style=3D"margin-right:0in;margin-bottom:8pt;margin-left:0.5in">
<span style=3D"font-size:10pt;font-family:Arial,sans-serif;color:black">On =
January 31, 2021 8:08:31 AM Robert Raszuk &lt;<a href=3D"mailto:robert@rasz=
uk.net" target=3D"_blank">robert@raszuk.net</a>&gt; wrote:<u></u><u></u></s=
pan></p>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid gray;padding:0in 0in 0in 5pt;margin-left:4.5pt;margin-=
right:0in">
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><span style=3D"color:bla=
ck">Hi=C2=A0Adrian,<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><span style=3D"color:bla=
ck"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><span style=3D"color:bla=
ck">&gt; To your 3209 comments: I believe that *<b>some</b>* implementation=
s have pushed the =E2=80=9Creservation=E2=80=9D=C2=A0<u></u><u></u></span><=
/p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><span style=3D"color:bla=
ck">&gt; into the data plane so that in-network policing is performed to co=
nform data flows with reservations or,=C2=A0=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><span style=3D"color:bla=
ck"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><span style=3D"color:bla=
ck">Sure thing that any decent TE implementation and deployment must provid=
e ingress policing into TE-LSPs. But this is ingress policing not reservati=
on of actual data plane resources which
 explicitly=C2=A0Jie explained as the intention here.=C2=A0<u></u><u></u></=
span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><span style=3D"color:bla=
ck"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><span style=3D"color:bla=
ck">Best,<br>
R.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><span style=3D"color:bla=
ck"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><span style=3D"color:bla=
ck"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in"><span style=3D"color:bla=
ck">&gt; On Sun, Jan 31, 2021 at 1:06 PM Adrian Farrel &lt;<a href=3D"mailt=
o:adrian@olddog.co.uk" target=3D"_blank">adrian@olddog.co.uk</a>&gt; wrote:=
<u></u><u></u></span></p>
</div>
<div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4=
.8pt;margin-right:0in">
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">Yeah, thanks Robert.<u></u><u></=
u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">Actually, removing the compariso=
n with other protocols is probably wise. This is a document describing how =
to do stuff with SR. In that context we don=E2=80=99t need to talk about th=
e benefits or limitations of other protocols.<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">To your 3209 comments: I believe=
 that *<b>some</b>* implementations have pushed the =E2=80=9Creservation=E2=
=80=9D into the data plane so that in-network policing is performed to conf=
orm data flows with reservations or, at least, ensure
 that the parts of any flow that exceed reservation are treated as best eff=
ort. But this is an aside to the discussion of the draft at hand.<u></u><u>=
</u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">I think that the document should=
 note that the SR control plane does not currently have the capability to m=
ake reservations (in the control plane) at the network nodes. This can be a=
chieved using a central controller to
 keep tabs on all resource accounting, and it could use a southbound interf=
ace to install that information in the (management/control parts of the) ne=
twork nodes.<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">Cheers,<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">Adrian<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
<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" style=3D"margin-left:0.5in">
<b><span style=3D"color:black">From:</span></b><span style=3D"color:black">=
 Robert Raszuk &lt;<a href=3D"mailto:robert@raszuk.net" target=3D"_blank">r=
obert@raszuk.net</a>&gt;
<br>
<b>Sent:</b> 31 January 2021 00:46<br>
<b>To:</b> Adrian Farrel &lt;<a href=3D"mailto:adrian@olddog.co.uk" target=
=3D"_blank">adrian@olddog.co.uk</a>&gt;<br>
<b>Cc:</b> James Guichard &lt;<a href=3D"mailto:james.n.guichard@futurewei.=
com" target=3D"_blank">james.n.guichard@futurewei.com</a>&gt;; SPRING WG &l=
t;<a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a>&=
gt;;
<a href=3D"mailto:spring-chairs@ietf.org" target=3D"_blank">spring-chairs@i=
etf.org</a><br>
<b>Subject:</b> Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-=
enhanced-vpn</span><span lang=3D"EN-GB" style=3D"color:black"><u></u><u></u=
></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">Hi Adrian,<u></u><u></u></span><=
/p>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">Just to make sure my point was c=
orrectly understood ... I am not questioning if either data plane or contro=
l plane resource reservations should or should not be done for SR.=C2=A0<u>=
</u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">What I am questioning is that th=
e draft says:=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0 =C2=A0When<br>
=C2=A0 =C2=A0compared with RSVP-TE [RFC3209], SR currently does not have th=
e<br>
=C2=A0 =C2=A0capability to reserve network resources or identify different =
sets of<br>
=C2=A0 =C2=A0network resources reserved for different customers and/or serv=
ices.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">The crux of the matter is that R=
FC3209 DOES NOT reserve anything in the data plane of any network element w=
hile this spec clearly intends to. RSVP-TE keeps all reservations in contro=
l plane counters only. Constrained=C2=A0based
 path computation/selection happens based on those control=C2=A0plane=C2=A0=
information. (Yes nearly 20 years after this feature shipped I am still mee=
ting people who believe otherwise :).=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">So to start I recommend we remov=
e any reference=C2=A0to RSVP-TE as this is purely not applicable to what th=
is document is trying to accomplish.=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">I admit I did not follow all the=
 recent advancements in TEAS nor=C2=A0in DETNET as far as actually reservin=
g data plane=C2=A0resources in data plane=C2=A0for some traffic types. If a=
uthors want to build a solution with that - by all
 means green light and full speed ahead - market will decided - especially =
when it will really understand the cost :) But let&#39;s make sure the docu=
ment is crystal clear on what building blocks it is talking about.=C2=A0<u>=
</u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">Best,<br>
R.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">On Sat, Jan 30, 2021 at 11:20 PM=
 Adrian Farrel &lt;<a href=3D"mailto:adrian@olddog.co.uk" target=3D"_blank"=
>adrian@olddog.co.uk</a>&gt; wrote:<u></u><u></u></span></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin:5pt 0i=
n 5pt 4.8pt">
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">Thanks, Jim,<u></u><u></u></span=
></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">I=E2=80=99ve been following the =
enhanced VPN work in TEAS and I see it as a key piece of the network slicin=
g work.<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">It=E2=80=99s time that we had so=
me protocol solutions that serve the VPN framework, and this is a suitable =
starting point. I like that it is not specifying additional protocol widget=
s but has looked at what we already have and
 is pointing up ways to use those tools to deliver new function.<u></u><u><=
/u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">I see Robert=E2=80=99s point abo=
ut the resource reservation aspects of traffic engineering applied to an SR=
 network, but this is not an insurmountable problem. The question might be =
asked, =E2=80=9CWhy would you want to do that?=E2=80=9D but
 that is a question that (as Yakov would have said) the market can decide. =
It seems that there are a couple of vendors and a couple of operators who h=
ave an interest.<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">So I think we should adopt this =
draft and see whether we can turn it into something that has great utility.=
<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">Cheers,<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">Adrian<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></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" style=3D"margin-left:0.5in">
<b><span style=3D"color:black">From:</span></b><span style=3D"color:black">=
 spring &lt;<a href=3D"mailto:spring-bounces@ietf.org" target=3D"_blank">sp=
ring-bounces@ietf.org</a>&gt;
<b>On Behalf Of </b>James Guichard<br>
<b>Sent:</b> 27 January 2021 11:47<br>
<b>To:</b> <a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf=
.org</a><br>
<b>Cc:</b> <a href=3D"mailto:spring-chairs@ietf.org" target=3D"_blank">spri=
ng-chairs@ietf.org</a><br>
<b>Subject:</b> [spring] WG Adoption Call for draft-dong-spring-sr-for-enha=
nced-vpn</span><span lang=3D"EN-GB" style=3D"color:black"><u></u><u></u></s=
pan></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">=C2=A0<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span style=3D"color:black">Dear WG:</span><span lang=3D"EN-GB" style=3D"co=
lor:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span style=3D"color:black">=C2=A0</span><span lang=3D"EN-GB" style=3D"colo=
r:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span style=3D"color:black">This message starts a 2 week WG adoption call f=
or <a href=3D"https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enh=
anced-vpn/" target=3D"_blank">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.</span><span lang=3D"EN-GB" style=3D"=
color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span style=3D"color:black">=C2=A0</span><span lang=3D"EN-GB" style=3D"colo=
r:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span style=3D"color:black">After review of the document please indicate su=
pport (or not) for WG adoption to the mailing list and if you are willing t=
o work on the document, please state this explicitly. This gives the chairs=
 an indication of the energy level
 of people in the working group willing to work on this document. Please al=
so provide comments/reasons for your support (or lack thereof) as this is a=
 stronger way to indicate your (non) support as this is not a vote.</span><=
span lang=3D"EN-GB" style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span style=3D"color:black">=C2=A0</span><span lang=3D"EN-GB" style=3D"colo=
r:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span style=3D"color:black">Thanks!</span><span lang=3D"EN-GB" style=3D"col=
or:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span style=3D"color:black">=C2=A0</span><span lang=3D"EN-GB" style=3D"colo=
r:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span style=3D"color:black">Jim, Bruno &amp; Joel</span><span lang=3D"EN-GB=
" style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span style=3D"color:black">=C2=A0</span><span lang=3D"EN-GB" style=3D"colo=
r:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span style=3D"color:black">=C2=A0</span><span lang=3D"EN-GB" style=3D"colo=
r:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span style=3D"color:black">=C2=A0</span><span lang=3D"EN-GB" style=3D"colo=
r:black"><u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:0.5in">
<span lang=3D"EN-GB" style=3D"color:black">________________________________=
_______________<br>
spring mailing list<br>
<a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a><br=
>
<a href=3D"https://www.ietf.org/mailman/listinfo/spring" target=3D"_blank">=
https://www.ietf.org/mailman/listinfo/spring</a><u></u><u></u></span></p>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
<br>
<p style=3D"font-family:Calibri;font-size:7pt;color:rgb(0,0,0);margin:15pt"=
 align=3D"Center">
Juniper Business Use Only<br>
</p>
</div>

</blockquote></div>

--000000000000f2e95805ba5734e4--


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From: Giuseppe Fioccola <giuseppe.fioccola@huawei.com>
To: James Guichard <james.n.guichard@futurewei.com>, "spring@ietf.org" <spring@ietf.org>
CC: "spring-chairs@ietf.org" <spring-chairs@ietf.org>
Thread-Topic: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Date: Tue, 2 Feb 2021 14:01:17 +0000
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--_000_4834865901e24eaaa2f5d521183541d6huaweicom_
Content-Type: text/plain; charset="us-ascii"
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Hi All,
I have read it and support WG adoption for this draft that provides a mecha=
nism based on resource-aware SIDs in order to build SR based VTNs for Enhan=
ced VPN.

Regards,

Giuseppe

From: spring [mailto:spring-bounces@ietf.org] On Behalf Of James Guichard
Sent: Wednesday, January 27, 2021 12:47 PM
To: spring@ietf.org
Cc: spring-chairs@ietf.org
Subject: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vp=
n

Dear WG:

This message starts a 2 week WG adoption call for https://datatracker.ietf.=
org/doc/draft-dong-spring-sr-for-enhanced-vpn/ ending February 10th 2021.

After review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, plea=
se state this explicitly. This gives the chairs an indication of the energy=
 level of people in the working group willing to work on this document. Ple=
ase also provide comments/reasons for your support (or lack thereof) as thi=
s is a stronger way to indicate your (non) support as this is not a vote.

Thanks!

Jim, Bruno & Joel




--_000_4834865901e24eaaa2f5d521183541d6huaweicom_
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi All,<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">I have read it and sup=
port WG adoption for this draft that provides a mechanism</span><span style=
=3D"font-size:10.5pt;color:#1F497D;mso-fareast-language:ZH-CN"> based on re=
source-aware SIDs</span><span style=3D"color:#1F497D">
 in order to build SR based VTNs for Enhanced VPN<a name=3D"_MailEndCompose=
">.<o:p></o:p></a></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Regards,<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Giuseppe<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> spring [mailto:spring-bounces@ietf.org]=
 <b>On Behalf Of
</b>James Guichard<br>
<b>Sent:</b> Wednesday, January 27, 2021 12:47 PM<br>
<b>To:</b> spring@ietf.org<br>
<b>Cc:</b> spring-chairs@ietf.org<br>
<b>Subject:</b> [spring] WG Adoption Call for draft-dong-spring-sr-for-enha=
nced-vpn<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Dear WG:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">This message starts a 2 week WG adoption call for <a=
 href=3D"https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced=
-vpn/">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">After review of the document please indicate support=
 (or not) for WG adoption to the mailing list and if you are willing to wor=
k on the document, please state this explicitly. This gives the chairs an i=
ndication of the energy level of people
 in the working group willing to work on this document. Please also provide=
 comments/reasons for your support (or lack thereof) as this is a stronger =
way to indicate your (non) support as this is not a vote.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks!<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Jim, Bruno &amp; Joel<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>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</body>
</html>

--_000_4834865901e24eaaa2f5d521183541d6huaweicom_--


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From: Tarek Saad <tsaad@juniper.net>
To: Robert Raszuk <robert@raszuk.net>
CC: James Guichard <james.n.guichard@futurewei.com>, Adrian Farrel <adrian@olddog.co.uk>, SPRING WG <spring@ietf.org>, Lou Berger <lberger@labn.net>, "spring-chairs@ietf.org" <spring-chairs@ietf.org>
Thread-Topic: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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From: Vasilenko Eduard <vasilenko.eduard@huawei.com>
To: "spring@ietf.org" <spring@ietf.org>
CC: "spring-chairs@ietf.org" <spring-chairs@ietf.org>
Thread-Topic: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Hi all,
There is the general trend to encode the action into the packet, not to dis=
tribute states in the control plane for all possible traffic types. Granula=
rity, programmability are better.
This type of virtualization is fully in-line with this trend.
Support.
Eduard
From: spring [mailto:spring-bounces@ietf.org] On Behalf Of James Guichard
Sent: Wednesday, January 27, 2021 12:47 PM
To: spring@ietf.org<mailto:spring@ietf.org>
Cc: spring-chairs@ietf.org<mailto:spring-chairs@ietf.org>
Subject: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vp=
n

Dear WG:

This message starts a 2 week WG adoption call for https://datatracker.ietf.=
org/doc/draft-dong-spring-sr-for-enhanced-vpn/ ending February 10th 2021.

After review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, plea=
se state this explicitly. This gives the chairs an indication of the energy=
 level of people in the working group willing to work on this document. Ple=
ase also provide comments/reasons for your support (or lack thereof) as thi=
s is a stronger way to indicate your (non) support as this is not a vote.

Thanks!

Jim, Bruno & Joel




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<div class=3D"WordSection1">
<p class=3D"MsoNormal">Hi all,<span style=3D"color:#1F497D"><o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal">There is the general trend to encode the action into=
 the packet, not to distribute states in the control plane for all possible=
 traffic types. Granularity, programmability are better.<o:p></o:p></p>
<p class=3D"MsoNormal">This type of virtualization is fully in-line with th=
is trend.<o:p></o:p></p>
<p class=3D"MsoNormal">Support.<o:p></o:p></p>
<p class=3D"MsoNormal">Eduard<o:p></o:p></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> spring [<a href=3D"mailto:spring-bounce=
s@ietf.org">mailto:spring-bounces@ietf.org</a>]
<b>On Behalf Of </b>James Guichard<br>
<b>Sent:</b> Wednesday, January 27, 2021 12:47 PM<br>
<b>To:</b> <a href=3D"mailto:spring@ietf.org">spring@ietf.org</a><br>
<b>Cc:</b> <a href=3D"mailto:spring-chairs@ietf.org">spring-chairs@ietf.org=
</a><br>
<b>Subject:</b> [spring] WG Adoption Call for draft-dong-spring-sr-for-enha=
nced-vpn<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Dear WG:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">This message starts a 2 week WG adoption call for <a=
 href=3D"https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced=
-vpn/">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">After review of the document please indicate support=
 (or not) for WG adoption to the mailing list and if you are willing to wor=
k on the document, please state this explicitly. This gives the chairs an i=
ndication of the energy level of people
 in the working group willing to work on this document. Please also provide=
 comments/reasons for your support (or lack thereof) as this is a stronger =
way to indicate your (non) support as this is not a vote.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks!<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Jim, Bruno &amp; Joel<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>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</body>
</html>

--_000_f978d7e834c044bbafc15dd75f4d663bhuaweicom_--


From nobody Tue Feb  2 08:21:01 2021
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Cc: Joel Halpern <jmh@joelhalpern.com>, The IESG <iesg@ietf.org>, draft-ietf-spring-sr-yang@ietf.org, jmh@joelhalpern.com, martin.vigoureux@nokia.com, rfc-editor@rfc-editor.org, spring-chairs@ietf.org,  spring@ietf.org
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Subject: [spring] Protocol Action: 'YANG Data Model for Segment Routing' to Proposed Standard (draft-ietf-spring-sr-yang-30.txt)
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The IESG has approved the following document:
- 'YANG Data Model for Segment Routing'
  (draft-ietf-spring-sr-yang-30.txt) as Proposed Standard

This document is the product of the Source Packet Routing in Networking
Working Group.

The IESG contact persons are Alvaro Retana, Deborah Brungard and Martin
Vigoureux.

A URL of this Internet Draft is:
https://datatracker.ietf.org/doc/draft-ietf-spring-sr-yang/





Technical Summary

   The document is the base YANG Data Model for Segment Routing.  It provides a module for base configuration and operation of segment routing systems.
   It also provides a module for detailed configuration and operation of MPLS segment routing.

Working Group Summary

   The document has been well-reviewed within the SPRING working group.  An early YANG Doctor review was done, and the issues from that review addressed.  A last call YANG Doctor review has been requested.  
   There was good support for the document in the working group, and no controversy during the last call.  Some minor typographic issues were found and fixed during the shepherd review.
   All authors have confirmed that all known relevant IPR has been disclosed as per BCP 78/79.  There are no IPR disclosures on the document.

Document Quality

   The document is well written and structured, making it easy to read.

Personnel

   The document shepherd is Joel Halpern. 
   The responsible Area Director is Martin Vigoureux.


From nobody Tue Feb  2 08:41:46 2021
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Congratulations to the working group and the authors for another 
document completed through IESG approval.

Yours,
Joel


-------- Forwarded Message --------
Subject: [spring] Protocol Action: 'YANG Data Model for Segment Routing' 
to Proposed Standard (draft-ietf-spring-sr-yang-30.txt)
Date: Tue, 02 Feb 2021 08:20:56 -0800
From: The IESG <iesg-secretary@ietf.org>
To: IETF-Announce <ietf-announce@ietf.org>
CC: spring@ietf.org, draft-ietf-spring-sr-yang@ietf.org, 
spring-chairs@ietf.org, The IESG <iesg@ietf.org>, jmh@joelhalpern.com, 
martin.vigoureux@nokia.com, rfc-editor@rfc-editor.org

The IESG has approved the following document:
- 'YANG Data Model for Segment Routing'
   (draft-ietf-spring-sr-yang-30.txt) as Proposed Standard

This document is the product of the Source Packet Routing in Networking
Working Group.

The IESG contact persons are Alvaro Retana, Deborah Brungard and Martin
Vigoureux.

A URL of this Internet Draft is:
https://datatracker.ietf.org/doc/draft-ietf-spring-sr-yang/





Technical Summary

    The document is the base YANG Data Model for Segment Routing.  It 
provides a module for base configuration and operation of segment 
routing systems.
    It also provides a module for detailed configuration and operation 
of MPLS segment routing.

Working Group Summary

    The document has been well-reviewed within the SPRING working group. 
  An early YANG Doctor review was done, and the issues from that review 
addressed.  A last call YANG Doctor review has been requested.     There 
was good support for the document in the working group, and no 
controversy during the last call.  Some minor typographic issues were 
found and fixed during the shepherd review.
    All authors have confirmed that all known relevant IPR has been 
disclosed as per BCP 78/79.  There are no IPR disclosures on the document.

Document Quality

    The document is well written and structured, making it easy to read.

Personnel

    The document shepherd is Joel Halpern.    The responsible Area 
Director is Martin Vigoureux.

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


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To: James Guichard <james.n.guichard@futurewei.com>
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Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Hi,

I support the WG adoption of this draft.

Thanks.

s.


> On Jan 27, 2021, at 12:46 PM, James Guichard =
<james.n.guichard@futurewei.com> wrote:
>=20
> Dear WG:
> =20
> This message starts a 2 week WG adoption call for =
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/ =
ending February 10th2021.
> =20
> After review of the document please indicate support (or not) for WG =
adoption to the mailing list and if you are willing to work on the =
document, please state this explicitly. This gives the chairs an =
indication of the energy level of people in the working group willing to =
work on this document. Please also provide comments/reasons for your =
support (or lack thereof) as this is a stronger way to indicate your =
(non) support as this is not a vote.
> =20
> Thanks!
> =20
> Jim, Bruno & Joel
> =20
> =20
> =20
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring


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Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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From: Colby Barth <barth.colby@gmail.com>
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To: Tarek Saad <tsaad=40juniper.net@dmarc.ietf.org>, "spring@ietf.org" <spring@ietf.org>, "spring-chairs@ietf.org" <spring-chairs@ietf.org>
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Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Tarek, indeed =E2=80=A6

draft-bestbar-spring-scalable-ns-00 provides a relevant example of the =
rather enormous amount of state the solution described in =
draft-dong-spring-sr-for-enhanced-vpn results in:

   "Notably, this approach requires maintaining per slice state for each
   topological element on every router in the network in both the
   control and data plane.  For example, a network composed of 'N'
   nodes, where each node has up to 'K' adjacencies to its neighbors, a
   node would have to assign and advertise 'M' Slice Prefix-SIDs and 'M'
   Slice Adjacency-SID(s) to each of it 'K' adjacencies.  Consequently,
   a router will have to maintain up to (N+K)*M SIDs in the control
   plane, and an equal number of label routes in its forwarding plane."


Put in practical terms, this implicitly limits the number of VTNs or, in =
draft-bestbar-teas-ns-packet-01 terminology, the number of Slice =
aggregates that can be offered.  It also introduces a dependency between =
the network size and the number of VTNs.  i.e. the larger the network, =
the smaller the number of VTNs that can be supported.

=E2=80=94Colby

> On Feb 2, 2021, at 12:54 PM, Tarek Saad =
<tsaad=3D40juniper.net@dmarc.ietf.org> wrote:
>=20
> Hi Eduard,
> =20
> Inline..
> =20
> On 2/2/21, 10:50 AM, "spring on behalf of Vasilenko Eduard" =
<spring-bounces@ietf.org on behalf of vasilenko.eduard@huawei.com> =
wrote:
> =20
> Hi all,
> There is the general trend to encode the action into the packet, not =
to distribute states in the control plane for all possible traffic =
types. Granularity, programmability are better.
> =20
> [TS]: Indeed, we are in agreement on encoding the information in =
packet as opposed to distributing states in the control plane. In =
draft-bestbar-spring-scalable-ns, a separate ID inside the packet is =
proposed to carry the needed information. However, this draft =
<draft-dong-spring-sr-for-enhanced-vpn> is proposing distributing per =
VTN state in the network which is completely against your argument ...
> =20
> Regards,
> Tarek
> =20
> =20
> =20
> This type of virtualization is fully in-line with this trend.
> Support.
> Eduard
> From: spring [mailto:spring-bounces@ietf.org] On Behalf Of James =
Guichard
> Sent: Wednesday, January 27, 2021 12:47 PM
> To: spring@ietf.org
> Cc: spring-chairs@ietf.org
> Subject: [spring] WG Adoption Call for =
draft-dong-spring-sr-for-enhanced-vpn
> =20
> Dear WG:
> =20
> This message starts a 2 week WG adoption call for =
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/ =
ending February 10th 2021.
> =20
> After review of the document please indicate support (or not) for WG =
adoption to the mailing list and if you are willing to work on the =
document, please state this explicitly. This gives the chairs an =
indication of the energy level of people in the working group willing to =
work on this document. Please also provide comments/reasons for your =
support (or lack thereof) as this is a stronger way to indicate your =
(non) support as this is not a vote.
> =20
> Thanks!
> =20
> Jim, Bruno & Joel
> =20
> =20
> =20
>=20
> Juniper Business Use Only
>=20
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring


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Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Colby, you are, as far as I can tell, correct that the potential for 
state explosion is extremely risky and requires careful management. 
That is why the bestbar draft emphasis that the state is abotu slice 
aggregates, not end-to-end slices, and probably not even individual IETF 
network slices.

Yours,
Joel

On 2/2/2021 2:19 PM, Colby Barth wrote:
> Tarek, indeed â€¦
> 
> draft-bestbar-spring-scalable-ns-00 provides a relevant example of the rather enormous amount of state the solution described in draft-dong-spring-sr-for-enhanced-vpn results in:
> 
>     "Notably, this approach requires maintaining per slice state for each
>     topological element on every router in the network in both the
>     control and data plane.  For example, a network composed of 'N'
>     nodes, where each node has up to 'K' adjacencies to its neighbors, a
>     node would have to assign and advertise 'M' Slice Prefix-SIDs and 'M'
>     Slice Adjacency-SID(s) to each of it 'K' adjacencies.  Consequently,
>     a router will have to maintain up to (N+K)*M SIDs in the control
>     plane, and an equal number of label routes in its forwarding plane."
> 
> 
> Put in practical terms, this implicitly limits the number of VTNs or, in draft-bestbar-teas-ns-packet-01 terminology, the number of Slice aggregates that can be offered.  It also introduces a dependency between the network size and the number of VTNs.  i.e. the larger the network, the smaller the number of VTNs that can be supported.
> 
> â€”Colby
> 
>> On Feb 2, 2021, at 12:54 PM, Tarek Saad <tsaad=40juniper.net@dmarc.ietf.org> wrote:
>>
>> Hi Eduard,
>>   
>> Inline..
>>   
>> On 2/2/21, 10:50 AM, "spring on behalf of Vasilenko Eduard" <spring-bounces@ietf.org on behalf of vasilenko.eduard@huawei.com> wrote:
>>   
>> Hi all,
>> There is the general trend to encode the action into the packet, not to distribute states in the control plane for all possible traffic types. Granularity, programmability are better.
>>   
>> [TS]: Indeed, we are in agreement on encoding the information in packet as opposed to distributing states in the control plane. In draft-bestbar-spring-scalable-ns, a separate ID inside the packet is proposed to carry the needed information. However, this draft <draft-dong-spring-sr-for-enhanced-vpn> is proposing distributing per VTN state in the network which is completely against your argument ...
>>   
>> Regards,
>> Tarek
>>   
>>   
>>   
>> This type of virtualization is fully in-line with this trend.
>> Support.
>> Eduard
>> From: spring [mailto:spring-bounces@ietf.org] On Behalf Of James Guichard
>> Sent: Wednesday, January 27, 2021 12:47 PM
>> To: spring@ietf.org
>> Cc: spring-chairs@ietf.org
>> Subject: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
>>   
>> Dear WG:
>>   
>> This message starts a 2 week WG adoption call for https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/ ending February 10th 2021.
>>   
>> After review of the document please indicate support (or not) for WG adoption to the mailing list and if you are willing to work on the document, please state this explicitly. This gives the chairs an indication of the energy level of people in the working group willing to work on this document. Please also provide comments/reasons for your support (or lack thereof) as this is a stronger way to indicate your (non) support as this is not a vote.
>>   
>> Thanks!
>>   
>> Jim, Bruno & Joel
>>   
>>   
>>   
>>
>> Juniper Business Use Only
>>
>> _______________________________________________
>> spring mailing list
>> spring@ietf.org
>> https://www.ietf.org/mailman/listinfo/spring
> 


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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charse=
t=3Dutf-8"><style>body { line-height: 1.5; }blockquote { margin-top: 0px; =
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mily: =E7=AD=89=E7=BA=BF; color: rgb(0, 0, 0); line-height: 1.5; }</style>=
</head><body>=0A<!--[if gte mso 9]><xml>=0A<o:shapedefaults v:ext=3D"edit"=
 spidmax=3D"1026" ></o:shapedefaults>=0A</xml><![endif]--><!--[if gte mso =
9]><xml>=0A<o:shapelayout v:ext=3D"edit">=0A<o:idmap v:ext=3D"edit" data=
=3D"1" ></o:idmap>=0A</o:shapelayout></xml><![endif]-->=0A<div><span style=
=3D"color: rgb(0, 0, 0); line-height: 1.5; background-color: rgba(0, 0, 0,=
 0);">I&nbsp;support&nbsp;the&nbsp;adoption&nbsp;of&nbsp;this&nbsp;documen=
t.&nbsp;</span></div><div><span style=3D"color: rgb(0, 0, 0); line-height:=
 1.5; background-color: rgba(0, 0, 0, 0);">The&nbsp;capability&nbsp;of&nbs=
p;providing&nbsp;different&nbsp;services&nbsp;with&nbsp;customized&nbsp;vi=
rtual&nbsp;networks&nbsp;and&nbsp;resources&nbsp;is&nbsp;important&nbsp;fo=
r&nbsp;a&nbsp;multi-service&nbsp;network&nbsp;operator.</span></div>=0A<di=
v><br></div><hr style=3D"width: 210px; height: 1px;" color=3D"#b5c4df" siz=
e=3D"1" align=3D"left">=0A<div><span><div style=3D"margin: 10px; font-size=
: 10pt;"><div style=3D"font-size: 14.6667px; line-height: 22px;"><span sty=
le=3D"font-size: 14.6667px; background-color: transparent;"><font face=3D"=
=E7=AD=89=E7=BA=BF">HUANAN CHEN=EF=BC=88=E9=99=88=E5=8D=8E=E5=8D=97=EF=BC=
=89</font></span></div><div style=3D"font-size: 14.6667px; line-height: 22=
px;"><span style=3D"font-size: 14.6667px; background-color: transparent;">=
Data Communication Research Department</span></div><div style=3D"font-size=
: 14.6667px; line-height: 22px;"><font face=3D"=E7=AD=89=E7=BA=BF">Researc=
h Institute of China Telecom Co.,Ltd.</font></div><div style=3D"font-size:=
 14.6667px; line-height: 22px;"><br></div></div></span></div><blockquote s=
tyle=3D"margin-Top: 0px; margin-Bottom: 0px; margin-Left: 0.5em; margin-Ri=
ght: inherit"><div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;pad=
ding:3.0pt 0cm 0cm 0cm"><div style=3D"PADDING-RIGHT: 8px; PADDING-LEFT: 8p=
x; FONT-SIZE: 12px;FONT-FAMILY:tahoma;COLOR:#000000; BACKGROUND: #efefef; =
PADDING-BOTTOM: 8px; PADDING-TOP: 8px"><div><b>From:</b>&nbsp;<a href=3D"m=
ailto:james.n.guichard@futurewei.com" style=3D"color: rgb(5, 99, 193); tex=
t-decoration: underline;">James Guichard</a></div><div><b>Date:</b>&nbsp;2=
021-01-27&nbsp;19:46</div><div><b>To:</b>&nbsp;<a href=3D"mailto:spring@ie=
tf.org" style=3D"color: rgb(5, 99, 193); text-decoration: underline;">spri=
ng@ietf.org</a></div><div><b>CC:</b>&nbsp;<a href=3D"mailto:spring-chairs@=
ietf.org" style=3D"color: rgb(5, 99, 193); text-decoration: underline;">sp=
ring-chairs@ietf.org</a></div><div><b>Subject:</b>&nbsp;[spring] WG Adopti=
on Call for draft-dong-spring-sr-for-enhanced-vpn</div></div></div><div><d=
iv class=3D"FoxDiv20210203082759039835">=0A<!--[if gte mso 9]><xml>=0A<o:s=
hapedefaults v:ext=3D"edit" spidmax=3D"1026" ></o:shapedefaults>=0A</xml><=
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idmap v:ext=3D"edit" data=3D"1" ></o:idmap>=0A</o:shapelayout></xml><![end=
if]-->=0A<div class=3D"WordSection1" style=3D"page: WordSection1;">=0A<p c=
lass=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: Cal=
ibri, sans-serif;">Dear WG:<o:p></o:p></p>=0A<p class=3D"MsoNormal" style=
=3D"margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p>=
&nbsp;</o:p></p>=0A<p class=3D"MsoNormal" style=3D"margin: 0in; font-size:=
 11pt; font-family: Calibri, sans-serif;">This message starts a 2 week WG =
adoption call for <a href=3D"https://datatracker.ietf.org/doc/draft-dong-s=
pring-sr-for-enhanced-vpn/" style=3D"color: rgb(5, 99, 193); text-decorati=
on: underline;">=0Ahttps://datatracker.ietf.org/doc/draft-dong-spring-sr-f=
or-enhanced-vpn/</a> ending February 10<sup>th</sup> 2021.<o:p></o:p></p>=
=0A<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-fami=
ly: Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A<p class=3D"MsoNormal" s=
tyle=3D"margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;">A=
fter review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, ple=
ase state this explicitly. This gives the chairs an indication of the ener=
gy level of people=0A in the working group willing to work on this documen=
t. Please also provide comments/reasons for your support (or lack thereof)=
 as this is a stronger way to indicate your (non) support as this is not a=
 vote.<o:p></o:p></p>=0A<p class=3D"MsoNormal" style=3D"margin: 0in; font-=
size: 11pt; font-family: Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A<p =
class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: Ca=
libri, sans-serif;">Thanks!<o:p></o:p></p>=0A<p class=3D"MsoNormal" style=
=3D"margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p>=
&nbsp;</o:p></p>=0A<p class=3D"MsoNormal" style=3D"margin: 0in; font-size:=
 11pt; font-family: Calibri, sans-serif;">Jim, Bruno &amp; Joel<o:p></o:p>=
</p>=0A<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-=
family: Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A<p class=3D"MsoNorma=
l" style=3D"margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif=
;"><o:p>&nbsp;</o:p></p>=0A<p class=3D"MsoNormal" style=3D"margin: 0in; fo=
nt-size: 11pt; font-family: Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A=
</div>=0A</div></div></blockquote>=0A</body></html>
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 3 Feb 2021 14:01:42 -0800
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To: Adrian Farrel <adrian@olddog.co.uk>
Cc: James Guichard <james.n.guichard@futurewei.com>, spring <spring@ietf.org>,  spring-chairs@ietf.org
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Subject: [spring] When we have multiple proposals addressing the same problem [Re: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn]
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Dear All,
I've edited the subject though left the original line in place to indicate
the relationship between threads of discussion.
Several comments already have referenced *bestbar* drafts that, in my
understanding of them, propose a different solution to the problem
addressed in draft-dong-spring-sr-for-enhanced-vpn. The situation when more
than a single technical solution being offered is not unusual, probably
that is what one can expect at IETF. And I think that "let's ensure that
this is solid technical work while allowing the market to decide whether it
is better than others" is very reasonable and removes non-technical
considerations from a WG AP (or LC). If we use that paradigm, other
solutions, for example, *bestbar* drafts, would be considered for
adoption and, if adopted, progress on the Standards track. If that is what
the WG decides to do, standardize sound technical solutions, no matter how
many, then, by all means, I support it. What I feel uneasy about is if
adopting one proposal would create a situation preventing standardization
of other solutions. The WG faced a similar problem just recently and a
design team has been formed with a clear task and deliverables. Perhaps
another design team can be formed to work to analyze the problem and
proposed solutions? I've attempted to capture what seems to be relevant to
the problem:

   - related to the data plane

https://tools.ietf.org/html/draft-ali-spring-network-slicing-building-block=
s-03

https://tools.ietf.org/html/draft-peng-teas-network-slicing-04

https://tools.ietf.org/html/draft-bestbar-teas-ns-packet-01

https://tools.ietf.org/html/draft-bestbar-spring-scalable-ns-00

https://tools.ietf.org/html/draft-decraene-mpls-slid-encoded-entropy-label-=
id-00

https://tools.ietf.org/html/draft-dong-6man-enhanced-vpn-vtn-id-02

https://tools.ietf.org/html/draft-filsfils-spring-srv6-stateless-slice-id-0=
2


<https://tools.ietf.org/html/draft-ali-spring-network-slicing-building-bloc=
ks-03>

   - related to the control plane extensions:

https://tools.ietf.org/html/draft-zch-lsr-isis-network-slicing-06

https://tools.ietf.org/html/draft-zhu-lsr-isis-sr-vtn-flexalgo-01

https://tools.ietf.org/html/draft-xie-lsr-isis-sr-vtn-mt-02

https://tools.ietf.org/html/draft-peng-lsr-flex-algo-l2bundles-05

https://tools.ietf.org/html/draft-dong-lsr-sr-enhanced-vpn-04

https://tools.ietf.org/html/draft-chen-idr-bgp-ls-transport-slice-02

https://tools.ietf.org/html/draft-xie-idr-bgpls-sr-vtn-mt-02

https://tools.ietf.org/html/draft-zhu-idr-bgpls-sr-vtn-flexalgo-00

https://tools.ietf.org/html/draft-chen-idr-bgp-ls-transport-slice-srv6-01

https://tools.ietf.org/html/draft-dong-idr-bgpls-sr-enhanced-vpn-02.

<https://tools.ietf.org/html/draft-zch-lsr-isis-network-slicing-06>

Regards, <https://tools.ietf.org/html/draft-zhu-lsr-isis-sr-vtn-flexalgo-01=
>

Greg

On Sat, Jan 30, 2021 at 2:20 PM Adrian Farrel <adrian@olddog.co.uk> wrote:

> Thanks, Jim,
>
>
>
> I=E2=80=99ve been following the enhanced VPN work in TEAS and I see it as=
 a key
> piece of the network slicing work.
>
>
>
> It=E2=80=99s time that we had some protocol solutions that serve the VPN
> framework, and this is a suitable starting point. I like that it is not
> specifying additional protocol widgets but has looked at what we already
> have and is pointing up ways to use those tools to deliver new function.
>
>
>
> I see Robert=E2=80=99s point about the resource reservation aspects of tr=
affic
> engineering applied to an SR network, but this is not an insurmountable
> problem. The question might be asked, =E2=80=9CWhy would you want to do t=
hat?=E2=80=9D but
> that is a question that (as Yakov would have said) the market can decide.
> It seems that there are a couple of vendors and a couple of operators who
> have an interest.
>
>
>
> So I think we should adopt this draft and see whether we can turn it into
> something that has great utility.
>
>
>
> Cheers,
>
> Adrian
>
>
>
> *From:* spring <spring-bounces@ietf.org> *On Behalf Of *James Guichard
> *Sent:* 27 January 2021 11:47
> *To:* spring@ietf.org
> *Cc:* spring-chairs@ietf.org
> *Subject:* [spring] WG Adoption Call for
> draft-dong-spring-sr-for-enhanced-vpn
>
>
>
> Dear WG:
>
>
>
> This message starts a 2 week WG adoption call for
> https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/
> ending February 10th 2021.
>
>
>
> After review of the document please indicate support (or not) for WG
> adoption to the mailing list and if you are willing to work on the
> document, please state this explicitly. This gives the chairs an indicati=
on
> of the energy level of people in the working group willing to work on thi=
s
> document. Please also provide comments/reasons for your support (or lack
> thereof) as this is a stronger way to indicate your (non) support as this
> is not a vote.
>
>
>
> Thanks!
>
>
>
> Jim, Bruno & Joel
>
>
>
>
>
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
>

--0000000000001c700b05ba75bc40
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Dear All,</div><div>I&#39;ve edited the subject thoug=
h left the original line in place to indicate the relationship between thre=
ads of discussion.</div><div>Several comments already have referenced *best=
bar* drafts that, in my understanding of them, propose a different solution=
 to the problem addressed in=C2=A0draft-dong-spring-sr-for-enhanced-vpn. Th=
e situation when more than a single technical solution being offered is not=
 unusual, probably that is what one can expect at IETF. And I think that &q=
uot;let&#39;s ensure that this is solid technical work while allowing the m=
arket to decide whether it is better than others&quot; is very reasonable a=
nd removes non-technical considerations from a WG AP (or LC). If we use tha=
t paradigm, other solutions, for example, *bestbar* drafts, would be consid=
ered for adoption=C2=A0and, if adopted, progress on the Standards track. If=
 that is what the WG decides to do, standardize sound technical solutions, =
no matter how many, then, by all means, I support it. What I feel uneasy ab=
out is if adopting one proposal would create a situation preventing standar=
dization of other solutions. The WG faced a similar problem just recently a=
nd a design team has been formed with a clear task and deliverables. Perhap=
s another design team can be formed to work to analyze the problem and prop=
osed solutions? I&#39;ve attempted to capture what seems to be relevant to =
the problem:</div><div><ul><li>related to the data plane</li></ul></div><bl=
ockquote style=3D"margin:0 0 0 40px;border:none;padding:0px"><div><p style=
=3D"box-sizing:border-box;margin-top:0px;margin-bottom:0px;min-height:14px;=
font-family:arial;outline:0px"><a href=3D"https://tools.ietf.org/html/draft=
-ali-spring-network-slicing-building-blocks-03" target=3D"_blank" style=3D"=
color:rgb(51,122,183);box-sizing:border-box;outline:0px">https://tools.ietf=
.org/html/draft-ali-spring-network-slicing-building-blocks-03</a></p></div>=
<div><p style=3D"box-sizing:border-box;margin-top:0px;margin-bottom:0px;min=
-height:14px;font-family:arial;outline:0px"><a href=3D"https://tools.ietf.o=
rg/html/draft-peng-teas-network-slicing-04" target=3D"_blank" style=3D"colo=
r:rgb(51,122,183);box-sizing:border-box;outline:0px">https://tools.ietf.org=
/html/draft-peng-teas-network-slicing-04</a></p></div><div><p style=3D"box-=
sizing:border-box;margin-top:0px;margin-bottom:0px;min-height:14px;font-fam=
ily:arial;outline:0px"><a href=3D"https://tools.ietf.org/html/draft-bestbar=
-teas-ns-packet-01" target=3D"_blank" style=3D"color:rgb(51,122,183);box-si=
zing:border-box;outline:0px">https://tools.ietf.org/html/draft-bestbar-teas=
-ns-packet-01</a></p></div><div><p style=3D"box-sizing:border-box;margin-to=
p:0px;margin-bottom:0px;min-height:14px;font-family:arial;outline:0px"><a h=
ref=3D"https://tools.ietf.org/html/draft-bestbar-spring-scalable-ns-00" tar=
get=3D"_blank" style=3D"color:rgb(51,122,183);box-sizing:border-box;outline=
:0px">https://tools.ietf.org/html/draft-bestbar-spring-scalable-ns-00</a></=
p></div><div><p style=3D"box-sizing:border-box;margin-top:0px;margin-bottom=
:0px;min-height:14px;font-family:arial;outline:0px"><a href=3D"https://tool=
s.ietf.org/html/draft-decraene-mpls-slid-encoded-entropy-label-id-00" targe=
t=3D"_blank" style=3D"color:rgb(51,122,183);box-sizing:border-box;outline:0=
px">https://tools.ietf.org/html/draft-decraene-mpls-slid-encoded-entropy-la=
bel-id-00</a></p></div><div><p style=3D"box-sizing:border-box;margin-top:0p=
x;margin-bottom:0px;min-height:14px;font-family:arial;outline:0px"><a href=
=3D"https://tools.ietf.org/html/draft-dong-6man-enhanced-vpn-vtn-id-02" tar=
get=3D"_blank" style=3D"color:rgb(51,122,183);box-sizing:border-box;outline=
:0px">https://tools.ietf.org/html/draft-dong-6man-enhanced-vpn-vtn-id-02</a=
></p></div><div><p><a href=3D"https://tools.ietf.org/html/draft-filsfils-sp=
ring-srv6-stateless-slice-id-02" target=3D"_blank" style=3D"color:rgb(51,12=
2,183);box-sizing:border-box;outline:0px">https://tools.ietf.org/html/draft=
-filsfils-spring-srv6-stateless-slice-id-02</a>=C2=A0</p></div></blockquote=
><div><p style=3D"box-sizing:border-box;margin-top:0px;margin-bottom:0px;mi=
n-height:14px;font-family:arial;outline:0px"><a href=3D"https://tools.ietf.=
org/html/draft-ali-spring-network-slicing-building-blocks-03" target=3D"_bl=
ank" style=3D"color:rgb(51,122,183);box-sizing:border-box;outline:0px"></a>=
</p></div><div><div style=3D"box-sizing:border-box;outline:0px"><ul><li><sp=
an style=3D"font-family:Arial,=E5=AE=8B=E4=BD=93,&quot;Microsoft Yahei&quot=
;,&quot;Lucida Grande&quot;,Verdana,Lucida,Helvetica,sans-serif;line-height=
:20px">related to the control plane extensions:</span></li></ul></div></div=
><blockquote style=3D"margin:0 0 0 40px;border:none;padding:0px"><div><div =
style=3D"box-sizing:border-box;outline:0px"><p style=3D"box-sizing:border-b=
ox;margin-top:0px;margin-bottom:0px;min-height:14px;line-height:20px;font-f=
amily:arial;outline:0px"><a href=3D"https://tools.ietf.org/html/draft-zch-l=
sr-isis-network-slicing-06" target=3D"_blank" style=3D"color:rgb(51,122,183=
);box-sizing:border-box;background-color:transparent;outline:0px">https://t=
ools.ietf.org/html/draft-zch-lsr-isis-network-slicing-06</a></p></div></div=
><div><div style=3D"box-sizing:border-box;outline:0px"><p style=3D"box-sizi=
ng:border-box;margin-top:0px;margin-bottom:0px;min-height:14px;line-height:=
20px;font-family:arial;outline:0px"><a href=3D"https://tools.ietf.org/html/=
draft-zhu-lsr-isis-sr-vtn-flexalgo-01" target=3D"_blank" style=3D"color:rgb=
(51,122,183);box-sizing:border-box;background-color:transparent;outline:0px=
">https://tools.ietf.org/html/draft-zhu-lsr-isis-sr-vtn-flexalgo-01</a></p>=
</div></div><div><div style=3D"box-sizing:border-box;outline:0px"><p style=
=3D"box-sizing:border-box;margin-top:0px;margin-bottom:0px;min-height:14px;=
line-height:20px;font-family:arial;outline:0px"><a href=3D"https://tools.ie=
tf.org/html/draft-xie-lsr-isis-sr-vtn-mt-02" target=3D"_blank" style=3D"col=
or:rgb(51,122,183);box-sizing:border-box;background-color:transparent;outli=
ne:0px">https://tools.ietf.org/html/draft-xie-lsr-isis-sr-vtn-mt-02</a></p>=
</div></div><div><div style=3D"box-sizing:border-box;outline:0px"><p style=
=3D"box-sizing:border-box;margin-top:0px;margin-bottom:0px;min-height:14px;=
line-height:20px;font-family:arial;outline:0px"><a href=3D"https://tools.ie=
tf.org/html/draft-peng-lsr-flex-algo-l2bundles-05" target=3D"_blank" style=
=3D"color:rgb(51,122,183);box-sizing:border-box;background-color:transparen=
t;outline:0px">https://tools.ietf.org/html/draft-peng-lsr-flex-algo-l2bundl=
es-05</a></p></div></div><div><div style=3D"box-sizing:border-box;outline:0=
px"><p style=3D"box-sizing:border-box;margin-top:0px;margin-bottom:0px;min-=
height:14px;line-height:20px;font-family:arial;outline:0px"><a href=3D"http=
s://tools.ietf.org/html/draft-dong-lsr-sr-enhanced-vpn-04" target=3D"_blank=
" style=3D"color:rgb(51,122,183);box-sizing:border-box;background-color:tra=
nsparent;outline:0px">https://tools.ietf.org/html/draft-dong-lsr-sr-enhance=
d-vpn-04</a></p></div></div><div><div style=3D"box-sizing:border-box;outlin=
e:0px"><p style=3D"box-sizing:border-box;margin-top:0px;margin-bottom:0px;m=
in-height:14px;line-height:20px;font-family:arial;outline:0px"><a href=3D"h=
ttps://tools.ietf.org/html/draft-chen-idr-bgp-ls-transport-slice-02" target=
=3D"_blank" style=3D"color:rgb(51,122,183);box-sizing:border-box;background=
-color:transparent;outline:0px">https://tools.ietf.org/html/draft-chen-idr-=
bgp-ls-transport-slice-02</a></p></div></div><div><div style=3D"box-sizing:=
border-box;outline:0px"><p style=3D"box-sizing:border-box;margin-top:0px;ma=
rgin-bottom:0px;min-height:14px;line-height:20px;font-family:arial;outline:=
0px"><a href=3D"https://tools.ietf.org/html/draft-xie-idr-bgpls-sr-vtn-mt-0=
2" target=3D"_blank" style=3D"color:rgb(51,122,183);box-sizing:border-box;b=
ackground-color:transparent;outline:0px">https://tools.ietf.org/html/draft-=
xie-idr-bgpls-sr-vtn-mt-02</a></p></div></div><div><div style=3D"box-sizing=
:border-box;outline:0px"><p style=3D"box-sizing:border-box;margin-top:0px;m=
argin-bottom:0px;min-height:14px;line-height:20px;font-family:arial;outline=
:0px"><a href=3D"https://tools.ietf.org/html/draft-zhu-idr-bgpls-sr-vtn-fle=
xalgo-00" target=3D"_blank" style=3D"color:rgb(51,122,183);box-sizing:borde=
r-box;background-color:transparent;outline:0px">https://tools.ietf.org/html=
/draft-zhu-idr-bgpls-sr-vtn-flexalgo-00</a></p></div></div><div><div style=
=3D"box-sizing:border-box;outline:0px"><p style=3D"box-sizing:border-box;ma=
rgin-top:0px;margin-bottom:0px;min-height:14px;line-height:20px;font-family=
:arial;outline:0px"><a href=3D"https://tools.ietf.org/html/draft-chen-idr-b=
gp-ls-transport-slice-srv6-01" target=3D"_blank" style=3D"color:rgb(51,122,=
183);box-sizing:border-box;background-color:transparent;outline:0px">https:=
//tools.ietf.org/html/draft-chen-idr-bgp-ls-transport-slice-srv6-01</a></p>=
</div></div><div><div style=3D"box-sizing:border-box;outline:0px"><p style=
=3D"box-sizing:border-box;margin-top:0px;margin-bottom:0px;min-height:14px;=
line-height:20px;font-family:arial;outline:0px"><a href=3D"https://tools.ie=
tf.org/html/draft-dong-idr-bgpls-sr-enhanced-vpn-02" target=3D"_blank" styl=
e=3D"color:rgb(51,122,183);box-sizing:border-box;background-color:transpare=
nt;outline:0px">https://tools.ietf.org/html/draft-dong-idr-bgpls-sr-enhance=
d-vpn-02</a>.</p></div></div></blockquote><div><div style=3D"box-sizing:bor=
der-box;outline:0px"><p style=3D"box-sizing:border-box;margin-top:0px;margi=
n-bottom:0px;min-height:14px;line-height:20px;font-family:arial;outline:0px=
"><a href=3D"https://tools.ietf.org/html/draft-zch-lsr-isis-network-slicing=
-06" target=3D"_blank" style=3D"color:rgb(51,122,183);box-sizing:border-box=
;background-color:transparent;outline:0px"></a></p></div></div><div><div st=
yle=3D"box-sizing:border-box;outline:0px"><p style=3D"box-sizing:border-box=
;margin-top:0px;margin-bottom:0px;min-height:14px;line-height:20px;font-fam=
ily:arial;outline:0px">Regards,<a href=3D"https://tools.ietf.org/html/draft=
-zhu-lsr-isis-sr-vtn-flexalgo-01" target=3D"_blank" style=3D"color:rgb(51,1=
22,183);box-sizing:border-box;background-color:transparent;outline:0px"></a=
></p><p style=3D"box-sizing:border-box;margin-top:0px;margin-bottom:0px;min=
-height:14px;line-height:20px;font-family:arial;outline:0px">Greg</p></div>=
</div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">=
On Sat, Jan 30, 2021 at 2:20 PM Adrian Farrel &lt;<a href=3D"mailto:adrian@=
olddog.co.uk">adrian@olddog.co.uk</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-GB" style=3D"overflow-wrap=
: break-word;"><div class=3D"gmail-m_-4348587302052624707WordSection1"><p c=
lass=3D"MsoNormal"><span>Thanks, Jim,<u></u><u></u></span></p><p class=3D"M=
soNormal"><span><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span=
>I=E2=80=99ve been following the enhanced VPN work in TEAS and I see it as =
a key piece of the network slicing work.<u></u><u></u></span></p><p class=
=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal">=
<span>It=E2=80=99s time that we had some protocol solutions that serve the =
VPN framework, and this is a suitable starting point. I like that it is not=
 specifying additional protocol widgets but has looked at what we already h=
ave and is pointing up ways to use those tools to deliver new function.<u><=
/u><u></u></span></p><p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></spa=
n></p><p class=3D"MsoNormal"><span>I see Robert=E2=80=99s point about the r=
esource reservation aspects of traffic engineering applied to an SR network=
, but this is not an insurmountable problem. The question might be asked, =
=E2=80=9CWhy would you want to do that?=E2=80=9D but that is a question tha=
t (as Yakov would have said) the market can decide. It seems that there are=
 a couple of vendors and a couple of operators who have an interest.<u></u>=
<u></u></span></p><p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span><=
/p><p class=3D"MsoNormal"><span>So I think we should adopt this draft and s=
ee whether we can turn it into something that has great utility.<u></u><u><=
/u></span></p><p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p><=
p class=3D"MsoNormal"><span>Cheers,<u></u><u></u></span></p><p class=3D"Mso=
Normal"><span>Adrian<u></u><u></u></span></p><p class=3D"MsoNormal"><span><=
u></u>=C2=A0<u></u></span></p><div><div style=3D"border-right:none;border-b=
ottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3=
pt 0cm 0cm"><p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b>=
<span lang=3D"EN-US"> spring &lt;<a href=3D"mailto:spring-bounces@ietf.org"=
 target=3D"_blank">spring-bounces@ietf.org</a>&gt; <b>On Behalf Of </b>Jame=
s Guichard<br><b>Sent:</b> 27 January 2021 11:47<br><b>To:</b> <a href=3D"m=
ailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a><br><b>Cc:</b> =
<a href=3D"mailto:spring-chairs@ietf.org" target=3D"_blank">spring-chairs@i=
etf.org</a><br><b>Subject:</b> [spring] WG Adoption Call for draft-dong-spr=
ing-sr-for-enhanced-vpn<u></u><u></u></span></p></div></div><p class=3D"Mso=
Normal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal"><span lang=3D"EN-US"=
>Dear WG:<u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-U=
S"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-U=
S">This message starts a 2 week WG adoption call for <a href=3D"https://dat=
atracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/" target=3D"_bl=
ank">https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn=
/</a> ending February 10<sup>th</sup> 2021.<u></u><u></u></span></p><p clas=
s=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p><p clas=
s=3D"MsoNormal"><span lang=3D"EN-US">After review of the document please in=
dicate support (or not) for WG adoption to the mailing list and if you are =
willing to work on the document, please state this explicitly. This gives t=
he chairs an indication of the energy level of people in the working group =
willing to work on this document. Please also provide comments/reasons for =
your support (or lack thereof) as this is a stronger way to indicate your (=
non) support as this is not a vote.<u></u><u></u></span></p><p class=3D"Mso=
Normal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p><p class=3D"Mso=
Normal"><span lang=3D"EN-US">Thanks!<u></u><u></u></span></p><p class=3D"Ms=
oNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p><p class=3D"Ms=
oNormal"><span lang=3D"EN-US">Jim, Bruno &amp; Joel<u></u><u></u></span></p=
><p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p=
><p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p=
><p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p=
></div></div>_______________________________________________<br>
spring mailing list<br>
<a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a><br=
>
<a href=3D"https://www.ietf.org/mailman/listinfo/spring" rel=3D"noreferrer"=
 target=3D"_blank">https://www.ietf.org/mailman/listinfo/spring</a><br>
</blockquote></div></div>

--0000000000001c700b05ba75bc40--


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From: Linda Dunbar <linda.dunbar@futurewei.com>
To: James Guichard <james.n.guichard@futurewei.com>, "spring@ietf.org" <spring@ietf.org>
CC: "spring-chairs@ietf.org" <spring-chairs@ietf.org>
Thread-Topic: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/wfTsxXdVTC7CCJnkKCPTMd-BW7I>
Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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--_000_SN6PR13MB2334F9AB5011D88395D8DF2E85B39SN6PR13MB2334namp_
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Dear WG,

I support the WG adoption of the draft.
It is true that the enhanced-vpn mechanism requires additional processing.
For some special environment, such as the 5G  Edge Computing servers within=
  N6 network, some operators may be willing to add the additional processin=
g (in the confined network) to achieve the desired QoS for the premium serv=
ices.
In addition, with zero rating (or zero rating +) applications increase, the=
 future may call for  more premium VPN+ services.

Linda Dunbar


From: spring <spring-bounces@ietf.org> On Behalf Of James Guichard
Sent: Wednesday, January 27, 2021 5:47 AM
To: spring@ietf.org
Cc: spring-chairs@ietf.org
Subject: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vp=
n

Dear WG:

This message starts a 2 week WG adoption call for https://datatracker.ietf.=
org/doc/draft-dong-spring-sr-for-enhanced-vpn/ ending February 10th 2021.

After review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, plea=
se state this explicitly. This gives the chairs an indication of the energy=
 level of people in the working group willing to work on this document. Ple=
ase also provide comments/reasons for your support (or lack thereof) as thi=
s is a stronger way to indicate your (non) support as this is not a vote.

Thanks!

Jim, Bruno & Joel




--_000_SN6PR13MB2334F9AB5011D88395D8DF2E85B39SN6PR13MB2334namp_
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<p class=3D"MsoNormal">Dear WG, <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I support the WG adoption of the draft. <o:p></o:p><=
/p>
<p class=3D"MsoNormal">It is true that the enhanced-vpn mechanism requires =
additional processing.
<o:p></o:p></p>
<p class=3D"MsoNormal">For some special environment, such as the 5G &nbsp;E=
dge Computing servers within &nbsp;N6 network, some operators may be willin=
g to add the additional processing (in the confined network) to achieve the=
 desired QoS for the premium services.
<o:p></o:p></p>
<p class=3D"MsoNormal">In addition, with zero rating (or zero rating +) app=
lications increase, the future may call for &nbsp;more premium VPN+ service=
s.
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Linda Dunbar<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>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> spring &lt;spring-bounces@ietf.org&gt; =
<b>On Behalf Of
</b>James Guichard<br>
<b>Sent:</b> Wednesday, January 27, 2021 5:47 AM<br>
<b>To:</b> spring@ietf.org<br>
<b>Cc:</b> spring-chairs@ietf.org<br>
<b>Subject:</b> [spring] WG Adoption Call for draft-dong-spring-sr-for-enha=
nced-vpn<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Dear WG:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">This message starts a 2 week WG adoption call for <a=
 href=3D"https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced=
-vpn/">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">After review of the document please indicate support=
 (or not) for WG adoption to the mailing list and if you are willing to wor=
k on the document, please state this explicitly. This gives the chairs an i=
ndication of the energy level of people
 in the working group willing to work on this document. Please also provide=
 comments/reasons for your support (or lack thereof) as this is a stronger =
way to indicate your (non) support as this is not a vote.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks!<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Jim, Bruno &amp; Joel<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>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</body>
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--_000_SN6PR13MB2334F9AB5011D88395D8DF2E85B39SN6PR13MB2334namp_--


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From: Huaimo Chen <huaimo.chen@futurewei.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/UcPETPJ_FlPxtsJe7NNA9i-qSzE>
Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Hi Everyone,

    I support for its WG adoption. It uses resource aware SIDs to provide d=
ifferent SR based Virtual Transport Networks for different service requirem=
ents from customers. In addition, One VTN may be separated from the others.=
 This is useful.
    I have a couple of comments. In Section 2.2, "VTN.s" in the first sente=
nce should be "VTNs.".  In section 3.2, it seems better also to add statefu=
l PCE as a reference.

Best Regards,
Huaimo
________________________________
From: spring <spring-bounces@ietf.org> on behalf of James Guichard <james.n=
.guichard@futurewei.com>
Sent: Wednesday, January 27, 2021 6:46 AM
To: spring@ietf.org <spring@ietf.org>
Cc: spring-chairs@ietf.org <spring-chairs@ietf.org>
Subject: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vp=
n


Dear WG:



This message starts a 2 week WG adoption call for https://datatracker.ietf.=
org/doc/draft-dong-spring-sr-for-enhanced-vpn/<https://nam11.safelinks.prot=
ection.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-=
dong-spring-sr-for-enhanced-vpn%2F&data=3D04%7C01%7Chuaimo.chen%40futurewei=
.com%7C279f0709bae94787fa4f08d8c2b93a2c%7C0fee8ff2a3b240189c753a1d5591fedc%=
7C1%7C0%7C637473448126500112%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLC=
JQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0&sdata=3DL2XVwYEN3hJfTxqqI1=
ZH%2BhKWdL8nxhHSc3JSLCWjWyU%3D&reserved=3D0> ending February 10th 2021.



After review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, plea=
se state this explicitly. This gives the chairs an indication of the energy=
 level of people in the working group willing to work on this document. Ple=
ase also provide comments/reasons for your support (or lack thereof) as thi=
s is a stronger way to indicate your (non) support as this is not a vote.



Thanks!



Jim, Bruno & Joel







--_000_DM6PR13MB40832EC7124E6B0049B1F838F2B39DM6PR13MB4083namp_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
<style type=3D"text/css" style=3D"display:none;"> P {margin-top:0;margin-bo=
ttom:0;} </style>
</head>
<body dir=3D"ltr">
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
Hi Everyone,&nbsp;</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
&nbsp; &nbsp; I support for its WG adoption. It uses resource aware SIDs to=
 provide different SR based Virtual Transport Networks for different servic=
e requirements from customers. In addition, One VTN may be separated from t=
he others. This is useful.</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
&nbsp; &nbsp; I have a couple of comments. In Section 2.2, &quot;VTN.s&quot=
; in the first sentence should be &quot;VTNs.&quot;.&nbsp; In section 3.2, =
it seems better also to add stateful PCE as a reference.&nbsp;</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div>
<div id=3D"appendonsend"></div>
<div style=3D"font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12p=
t; color:rgb(0,0,0)">
Best Regards,</div>
<div style=3D"font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12p=
t; color:rgb(0,0,0)">
Huaimo</div>
<hr tabindex=3D"-1" style=3D"display:inline-block; width:98%">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" co=
lor=3D"#000000" style=3D"font-size:11pt"><b>From:</b> spring &lt;spring-bou=
nces@ietf.org&gt; on behalf of James Guichard &lt;james.n.guichard@futurewe=
i.com&gt;<br>
<b>Sent:</b> Wednesday, January 27, 2021 6:46 AM<br>
<b>To:</b> spring@ietf.org &lt;spring@ietf.org&gt;<br>
<b>Cc:</b> spring-chairs@ietf.org &lt;spring-chairs@ietf.org&gt;<br>
<b>Subject:</b> [spring] WG Adoption Call for draft-dong-spring-sr-for-enha=
nced-vpn</font>
<div>&nbsp;</div>
</div>
<div lang=3D"EN-US">
<div class=3D"x_WordSection1">
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
Dear WG:</p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
&nbsp;</p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
This message starts a 2 week WG adoption call for <a href=3D"https://nam11.=
safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracker.ietf.org%=
2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&amp;data=3D04%7C01%7Chuaim=
o.chen%40futurewei.com%7C279f0709bae94787fa4f08d8c2b93a2c%7C0fee8ff2a3b2401=
89c753a1d5591fedc%7C1%7C0%7C637473448126500112%7CUnknown%7CTWFpbGZsb3d8eyJW=
IjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0&amp;sdat=
a=3DL2XVwYEN3hJfTxqqI1ZH%2BhKWdL8nxhHSc3JSLCWjWyU%3D&amp;reserved=3D0" orig=
inalsrc=3D"https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanc=
ed-vpn/" shash=3D"bseRMb+/RAD7uaKZnxNBu8AIg9HcAo89j0hj7ALzzZ+aKdDorUp23XPHc=
s60R0kaAPkaFtezO4wu/UGzq1zvr0x11esZvwjleRl/3vkl/o1di5vhGWL06ZX+VrryNdlGiejv=
al4c/IgoHfrkewNmmQ8a1U/fRsiqois3k3ddPHI=3D">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.</p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
&nbsp;</p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
After review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, plea=
se state this explicitly. This gives the chairs an indication of the energy=
 level of people in the working
 group willing to work on this document. Please also provide comments/reaso=
ns for your support (or lack thereof) as this is a stronger way to indicate=
 your (non) support as this is not a vote.</p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
&nbsp;</p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
Thanks!</p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
&nbsp;</p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
Jim, Bruno &amp; Joel</p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
&nbsp;</p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
&nbsp;</p>
<p class=3D"x_MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family=
: Calibri, sans-serif;">
&nbsp;</p>
</div>
</div>
</div>
</body>
</html>

--_000_DM6PR13MB40832EC7124E6B0049B1F838F2B39DM6PR13MB4083namp_--


From nobody Thu Feb  4 06:47:02 2021
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From: IETF Secretariat <ietf-ipr@ietf.org>
To: <draft-ietf-spring-nsh-sr@ietf.org>
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Date: Thu, 04 Feb 2021 06:46:56 -0800
Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/zWw0KGmK5NNHvFPb9WWf-8YUfPQ>
Subject: [spring] IPR Disclosure Huawei Technologies Co., Ltd's Statement about IPR related to draft-ietf-spring-nsh-sr
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Dear Jim Guichard, Jeff Tantsura:


An IPR disclosure that pertains to your Internet-Draft entitled "Integration
of Network Service Header (NSH) and Segment Routing for Service Function
Chaining (SFC)" (draft-ietf-spring-nsh-sr) was submitted to the IETF
Secretariat on 2021-02-03 and has been posted on the "IETF Page of
Intellectual Property Rights Disclosures"
(https://datatracker.ietf.org/ipr/4626/). The title of the IPR disclosure is
"Huawei Technologies Co.,Ltd's Statement about IPR related to
draft-ietf-spring-nsh-sr"


Thank you

IETF Secretariat



From nobody Thu Feb  4 12:01:08 2021
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From: Linda Dunbar <linda.dunbar@futurewei.com>
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Subject: [spring] Comments to draft-ali-spring-network-slicing-building-blocks-03
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--_000_SN6PR13MB2334896B08338F45A8B2250285B39SN6PR13MB2334namp_
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Zafar, el al,

draft-ali-spring-network-slicing-building-blocks-03 has a very comprehensiv=
e description of various components of SR and how they can be put together.

However, I find the draft hasn't touched upon addressing the fundamental fe=
atures of Network Slicing.
Maybe the term "network slice" means very different things to different peo=
ple.

In 3GPP, a Network Slice includes the capabilities to manage, control and o=
rchestrate the subset of network resources independently from other Network=
 Slices.

The draft has a very good description on how SR achieves the On-demand poli=
cy, automatic steering and loop prevention. But the draft doesn't have any =
description on how subscribers can view and manage their dedicated network =
resources, or even what kind of network resources are visible/controllable =
by subscribers, which are the key components of Network Slicing. For exampl=
e, can SR allows a subscriber to specify their traffic not to be shared on =
link/nodes with others?

Best regards,
Linda Dunbar

--_000_SN6PR13MB2334896B08338F45A8B2250285B39SN6PR13MB2334namp_
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<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:Courier"=
>Zafar, el al,
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:Courier"=
><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:Courier"=
>draft-ali-spring-network-slicing-building-blocks-03 has a very comprehensi=
ve description of various components of SR and how they can be put together=
.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:Courier"=
><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:Courier"=
>However, I find the draft hasn&#8217;t touched upon addressing the fundame=
ntal features of Network Slicing.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:Courier"=
>Maybe the term &#8220;network slice&#8221; means very different things to =
different people.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:Courier"=
><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:Courier"=
>In 3GPP, a Network Slice includes the capabilities to manage, control and =
orchestrate the subset of network resources independently from other Networ=
k Slices. &nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:Courier"=
><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:Courier"=
>The draft has a very good description on how SR achieves the On-demand pol=
icy, automatic steering and loop prevention. But the draft doesn&#8217;t ha=
ve any description on how subscribers can
 view and manage their dedicated network resources, or even what kind of ne=
twork resources are visible/controllable by subscribers, which are the key =
components of Network Slicing. For example, can SR allows a subscriber to s=
pecify their traffic not to be shared
 on link/nodes with others?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:Courier"=
><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:Courier"=
>Best regards,
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:12.0pt;font-family:Courier"=
>Linda Dunbar</span><span style=3D"font-size:12.0pt;color:#0070C0"><o:p></o=
:p></span></p>
</div>
</body>
</html>

--_000_SN6PR13MB2334896B08338F45A8B2250285B39SN6PR13MB2334namp_--


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From: Linda Dunbar <linda.dunbar@futurewei.com>
To: Greg Mirsky <gregimirsky@gmail.com>, Adrian Farrel <adrian@olddog.co.uk>
CC: James Guichard <james.n.guichard@futurewei.com>, spring <spring@ietf.org>,  "spring-chairs@ietf.org" <spring-chairs@ietf.org>
Thread-Topic: [spring] When we have multiple proposals addressing the same problem [Re: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn]
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Date: Thu, 4 Feb 2021 20:26:39 +0000
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Subject: Re: [spring] When we have multiple proposals addressing the same problem [Re: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn]
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--_000_SN6PR13MB23346E332920CB2804C65AA385B39SN6PR13MB2334namp_
Content-Type: text/plain; charset="us-ascii"
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Greg,

Thank you very much for listing all those drafts related to Network Slicing=
.

But some of the drafts are only describing virtual partitioning of physical=
 networks and methods to guarantee their end to end quality. Those virtual =
partitioning of one physical networks using tags (MPLS, VLAN, RT, etc.)  ha=
ve been deployed for decades.

Is there any draft identifying the gaps between virtual partitioning of phy=
sical network and end to end Network Slicing?  In 3GPP, a Network Slice inc=
ludes the capabilities to manage, control and orchestrate the subset of net=
work resources independently from other Network Slices.

Linda Dunbar

From: spring <spring-bounces@ietf.org> On Behalf Of Greg Mirsky
Sent: Wednesday, February 3, 2021 4:02 PM
To: Adrian Farrel <adrian@olddog.co.uk>
Cc: James Guichard <james.n.guichard@futurewei.com>; spring <spring@ietf.or=
g>; spring-chairs@ietf.org
Subject: [spring] When we have multiple proposals addressing the same probl=
em [Re: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn]

Dear All,
I've edited the subject though left the original line in place to indicate =
the relationship between threads of discussion.
Several comments already have referenced *bestbar* drafts that, in my under=
standing of them, propose a different solution to the problem addressed in =
draft-dong-spring-sr-for-enhanced-vpn. The situation when more than a singl=
e technical solution being offered is not unusual, probably that is what on=
e can expect at IETF. And I think that "let's ensure that this is solid tec=
hnical work while allowing the market to decide whether it is better than o=
thers" is very reasonable and removes non-technical considerations from a W=
G AP (or LC). If we use that paradigm, other solutions, for example, *bestb=
ar* drafts, would be considered for adoption and, if adopted, progress on t=
he Standards track. If that is what the WG decides to do, standardize sound=
 technical solutions, no matter how many, then, by all means, I support it.=
 What I feel uneasy about is if adopting one proposal would create a situat=
ion preventing standardization of other solutions. The WG faced a similar p=
roblem just recently and a design team has been formed with a clear task an=
d deliverables. Perhaps another design team can be formed to work to analyz=
e the problem and proposed solutions? I've attempted to capture what seems =
to be relevant to the problem:

  *   related to the data plane

https://tools.ietf.org/html/draft-ali-spring-network-slicing-building-block=
s-03<https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fto=
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https://tools.ietf.org/html/draft-peng-teas-network-slicing-04<https://nam1=
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urewei.com%7Ce8ca98ef08ee41f2335708d8c88f585d%7C0fee8ff2a3b240189c753a1d559=
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https://tools.ietf.org/html/draft-bestbar-teas-ns-packet-01<https://nam11.s=
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https://tools.ietf.org/html/draft-bestbar-spring-scalable-ns-00<https://nam=
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HXtqQmmCuzlpxiMG%2BP5lHoVbsKfeC671ZMJ8%3D&reserved=3D0>

https://tools.ietf.org/html/draft-decraene-mpls-slid-encoded-entropy-label-=
id-00<https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ft=
ools.ietf.org%2Fhtml%2Fdraft-decraene-mpls-slid-encoded-entropy-label-id-00=
&data=3D04%7C01%7Clinda.dunbar%40futurewei.com%7Ce8ca98ef08ee41f2335708d8c8=
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&reserved=3D0>

https://tools.ietf.org/html/draft-dong-6man-enhanced-vpn-vtn-id-02<https://=
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ar%40futurewei.com%7Ce8ca98ef08ee41f2335708d8c88f585d%7C0fee8ff2a3b240189c7=
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sdX%2FQRDJw8%2BJ%2FDgJtG6mErs0DTQnIm1PeqNZbn5oTI%3D&reserved=3D0>

https://tools.ietf.org/html/draft-filsfils-spring-srv6-stateless-slice-id-0=
2<https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools=
.ietf.org%2Fhtml%2Fdraft-filsfils-spring-srv6-stateless-slice-id-02&data=3D=
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d=3D0>

  *   related to the control plane extensions:

https://tools.ietf.org/html/draft-zch-lsr-isis-network-slicing-06<https://n=
am11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2=
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tWylCnasP1DtpOP44r4xwIKa%2B%2BM1AgV6eB69aLho%3D&reserved=3D0>

https://tools.ietf.org/html/draft-zhu-lsr-isis-sr-vtn-flexalgo-01<https://n=
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https://tools.ietf.org/html/draft-xie-lsr-isis-sr-vtn-mt-02<https://nam11.s=
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https://tools.ietf.org/html/draft-peng-lsr-flex-algo-l2bundles-05<https://n=
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https://tools.ietf.org/html/draft-dong-lsr-sr-enhanced-vpn-04<https://nam11=
.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtm=
l%2Fdraft-dong-lsr-sr-enhanced-vpn-04&data=3D04%7C01%7Clinda.dunbar%40futur=
ewei.com%7Ce8ca98ef08ee41f2335708d8c88f585d%7C0fee8ff2a3b240189c753a1d5591f=
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https://tools.ietf.org/html/draft-chen-idr-bgp-ls-transport-slice-02<https:=
//nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.or=
g%2Fhtml%2Fdraft-chen-idr-bgp-ls-transport-slice-02&data=3D04%7C01%7Clinda.=
dunbar%40futurewei.com%7Ce8ca98ef08ee41f2335708d8c88f585d%7C0fee8ff2a3b2401=
89c753a1d5591fedc%7C1%7C0%7C637479865284127587%7CUnknown%7CTWFpbGZsb3d8eyJW=
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=3D7C%2Bp9XSzzwRT2YFgsNMvZN9cl8arcV0EA1xKUSczgOU%3D&reserved=3D0>

https://tools.ietf.org/html/draft-xie-idr-bgpls-sr-vtn-mt-02<https://nam11.=
safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml=
%2Fdraft-xie-idr-bgpls-sr-vtn-mt-02&data=3D04%7C01%7Clinda.dunbar%40futurew=
ei.com%7Ce8ca98ef08ee41f2335708d8c88f585d%7C0fee8ff2a3b240189c753a1d5591fed=
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7PveAU55PUEf6fwxYRwqynFcd8%2FlpU%3D&reserved=3D0>

https://tools.ietf.org/html/draft-zhu-idr-bgpls-sr-vtn-flexalgo-00<https://=
nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%=
2Fhtml%2Fdraft-zhu-idr-bgpls-sr-vtn-flexalgo-00&data=3D04%7C01%7Clinda.dunb=
ar%40futurewei.com%7Ce8ca98ef08ee41f2335708d8c88f585d%7C0fee8ff2a3b240189c7=
53a1d5591fedc%7C1%7C0%7C637479865284137580%7CUnknown%7CTWFpbGZsb3d8eyJWIjoi=
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UAcv2MIb6l%2Fg78Rd9gyMYh5qEK3xmH1DwWFLqa6Q6E%3D&reserved=3D0>

https://tools.ietf.org/html/draft-chen-idr-bgp-ls-transport-slice-srv6-01<h=
ttps://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ie=
tf.org%2Fhtml%2Fdraft-chen-idr-bgp-ls-transport-slice-srv6-01&data=3D04%7C0=
1%7Clinda.dunbar%40futurewei.com%7Ce8ca98ef08ee41f2335708d8c88f585d%7C0fee8=
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2000&sdata=3D1sZQeDHREsTpGJTsX7FmMXBxyit5Fm6A80f8vDhMqD8%3D&reserved=3D0>

https://tools.ietf.org/html/draft-dong-idr-bgpls-sr-enhanced-vpn-02<https:/=
/nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org=
%2Fhtml%2Fdraft-dong-idr-bgpls-sr-enhanced-vpn-02&data=3D04%7C01%7Clinda.du=
nbar%40futurewei.com%7Ce8ca98ef08ee41f2335708d8c88f585d%7C0fee8ff2a3b240189=
c753a1d5591fedc%7C1%7C0%7C637479865284147571%7CUnknown%7CTWFpbGZsb3d8eyJWIj=
oiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=
=3DA%2Fyot%2FTvLE6pE8J05OAQokerlrvDC1NpbVEiWuHdf2w%3D&reserved=3D0>.

Regards,

Greg

On Sat, Jan 30, 2021 at 2:20 PM Adrian Farrel <adrian@olddog.co.uk<mailto:a=
drian@olddog.co.uk>> wrote:
Thanks, Jim,

I've been following the enhanced VPN work in TEAS and I see it as a key pie=
ce of the network slicing work.

It's time that we had some protocol solutions that serve the VPN framework,=
 and this is a suitable starting point. I like that it is not specifying ad=
ditional protocol widgets but has looked at what we already have and is poi=
nting up ways to use those tools to deliver new function.

I see Robert's point about the resource reservation aspects of traffic engi=
neering applied to an SR network, but this is not an insurmountable problem=
. The question might be asked, "Why would you want to do that?" but that is=
 a question that (as Yakov would have said) the market can decide. It seems=
 that there are a couple of vendors and a couple of operators who have an i=
nterest.

So I think we should adopt this draft and see whether we can turn it into s=
omething that has great utility.

Cheers,
Adrian

From: spring <spring-bounces@ietf.org<mailto:spring-bounces@ietf.org>> On B=
ehalf Of James Guichard
Sent: 27 January 2021 11:47
To: spring@ietf.org<mailto:spring@ietf.org>
Cc: spring-chairs@ietf.org<mailto:spring-chairs@ietf.org>
Subject: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vp=
n

Dear WG:

This message starts a 2 week WG adoption call for https://datatracker.ietf.=
org/doc/draft-dong-spring-sr-for-enhanced-vpn/<https://nam11.safelinks.prot=
ection.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-=
dong-spring-sr-for-enhanced-vpn%2F&data=3D04%7C01%7Clinda.dunbar%40futurewe=
i.com%7Ce8ca98ef08ee41f2335708d8c88f585d%7C0fee8ff2a3b240189c753a1d5591fedc=
%7C1%7C0%7C637479865284157569%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiL=
CJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=3D18n%2FINEjeHbA=
kRirnct0YAHxP1neXCY386Yrwwanb28%3D&reserved=3D0> ending February 10th 2021.

After review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, plea=
se state this explicitly. This gives the chairs an indication of the energy=
 level of people in the working group willing to work on this document. Ple=
ase also provide comments/reasons for your support (or lack thereof) as thi=
s is a stronger way to indicate your (non) support as this is not a vote.

Thanks!

Jim, Bruno & Joel



_______________________________________________
spring mailing list
spring@ietf.org<mailto:spring@ietf.org>
https://www.ietf.org/mailman/listinfo/spring<https://nam11.safelinks.protec=
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pring&data=3D04%7C01%7Clinda.dunbar%40futurewei.com%7Ce8ca98ef08ee41f233570=
8d8c88f585d%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637479865284167567=
%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haW=
wiLCJXVCI6Mn0%3D%7C2000&sdata=3DFN6H4CR0LRYnTPF3gZuWS8KL88hACbL%2FsBOZYTZyL=
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<div class=3D"WordSection1">
<p class=3D"MsoNormal">Greg, <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thank you very much for listing all those drafts rel=
ated to Network Slicing.
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">But some of the drafts are only describing virtual p=
artitioning of physical networks and methods to guarantee their end to end =
quality. Those virtual partitioning of one physical networks using tags (MP=
LS, VLAN, RT, etc.) &nbsp;have been deployed
 for decades.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Is there any draft identifying the gaps between virt=
ual partitioning of physical network and end to end Network Slicing? &nbsp;=
In 3GPP, a Network Slice includes the capabilities to manage, control and o=
rchestrate the subset of network resources
 independently from other Network Slices. <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Linda Dunbar<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> spring &lt;spring-bounces@ietf.org&gt; =
<b>On Behalf Of
</b>Greg Mirsky<br>
<b>Sent:</b> Wednesday, February 3, 2021 4:02 PM<br>
<b>To:</b> Adrian Farrel &lt;adrian@olddog.co.uk&gt;<br>
<b>Cc:</b> James Guichard &lt;james.n.guichard@futurewei.com&gt;; spring &l=
t;spring@ietf.org&gt;; spring-chairs@ietf.org<br>
<b>Subject:</b> [spring] When we have multiple proposals addressing the sam=
e problem [Re: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn]<=
o:p></o:p></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<p class=3D"MsoNormal">Dear All,<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">I've edited the subject though left the original lin=
e in place to indicate the relationship between threads of discussion.<o:p>=
</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">Several comments already have referenced *bestbar* d=
rafts that, in my understanding of them, propose a different solution to th=
e problem addressed in&nbsp;draft-dong-spring-sr-for-enhanced-vpn. The situ=
ation when more than a single technical
 solution being offered is not unusual, probably that is what one can expec=
t at IETF. And I think that &quot;let's ensure that this is solid technical=
 work while allowing the market to decide whether it is better than others&=
quot; is very reasonable and removes non-technical
 considerations from a WG AP (or LC). If we use that paradigm, other soluti=
ons, for example, *bestbar* drafts, would be considered for adoption&nbsp;a=
nd, if adopted, progress on the Standards track. If that is what the WG dec=
ides to do, standardize sound technical
 solutions, no matter how many, then, by all means, I support it. What I fe=
el uneasy about is if adopting one proposal would create a situation preven=
ting standardization of other solutions. The WG faced a similar problem jus=
t recently and a design team has
 been formed with a clear task and deliverables. Perhaps another design tea=
m can be formed to work to analyze the problem and proposed solutions? I've=
 attempted to capture what seems to be relevant to the problem:<o:p></o:p><=
/p>
</div>
<div>
<ul type=3D"disc">
<li class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-=
alt:auto;mso-list:l0 level1 lfo1">
related to the data plane<o:p></o:p></li></ul>
</div>
<blockquote style=3D"margin-left:30.0pt;margin-right:0in">
<div>
<p style=3D"margin:0in;box-sizing:border-box;min-height:14px;outline:0px"><=
span style=3D"font-family:&quot;Arial&quot;,sans-serif"><a href=3D"https://=
nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%=
2Fhtml%2Fdraft-ali-spring-network-slicing-building-blocks-03&amp;data=3D04%=
7C01%7Clinda.dunbar%40futurewei.com%7Ce8ca98ef08ee41f2335708d8c88f585d%7C0f=
ee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637479865284047643%7CUnknown%7CTWF=
pbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D=
%7C2000&amp;sdata=3D51SeXlrqKkEPcZlZ%2B1crrkbbd2zmgPmY2ZUlV%2B7tL94%3D&amp;=
reserved=3D0" target=3D"_blank"><span style=3D"color:#337AB7">https://tools=
.ietf.org/html/draft-ali-spring-network-slicing-building-blocks-03</span></=
a><o:p></o:p></span></p>
</div>
<div>
<p style=3D"margin:0in;box-sizing:border-box;min-height:14px;outline:0px"><=
span style=3D"font-family:&quot;Arial&quot;,sans-serif"><a href=3D"https://=
nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%=
2Fhtml%2Fdraft-peng-teas-network-slicing-04&amp;data=3D04%7C01%7Clinda.dunb=
ar%40futurewei.com%7Ce8ca98ef08ee41f2335708d8c88f585d%7C0fee8ff2a3b240189c7=
53a1d5591fedc%7C1%7C0%7C637479865284047643%7CUnknown%7CTWFpbGZsb3d8eyJWIjoi=
MC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&amp;sdata=
=3DEhe%2B2jm5%2BId2FHzDmsuV6uB%2BCjjSBrY9vq2EHD6Lwhs%3D&amp;reserved=3D0" t=
arget=3D"_blank"><span style=3D"color:#337AB7">https://tools.ietf.org/html/=
draft-peng-teas-network-slicing-04</span></a><o:p></o:p></span></p>
</div>
<div>
<p style=3D"margin:0in;box-sizing:border-box;min-height:14px;outline:0px"><=
span style=3D"font-family:&quot;Arial&quot;,sans-serif"><a href=3D"https://=
nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%=
2Fhtml%2Fdraft-bestbar-teas-ns-packet-01&amp;data=3D04%7C01%7Clinda.dunbar%=
40futurewei.com%7Ce8ca98ef08ee41f2335708d8c88f585d%7C0fee8ff2a3b240189c753a=
1d5591fedc%7C1%7C0%7C637479865284057627%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4=
wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&amp;sdata=3D=
C2NNOnyu5%2BB9RhZCGdNRcl34KSjPJhhBGtxXLn2%2BNwo%3D&amp;reserved=3D0" target=
=3D"_blank"><span style=3D"color:#337AB7">https://tools.ietf.org/html/draft=
-bestbar-teas-ns-packet-01</span></a><o:p></o:p></span></p>
</div>
<div>
<p style=3D"margin:0in;box-sizing:border-box;min-height:14px;outline:0px"><=
span style=3D"font-family:&quot;Arial&quot;,sans-serif"><a href=3D"https://=
nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%=
2Fhtml%2Fdraft-bestbar-spring-scalable-ns-00&amp;data=3D04%7C01%7Clinda.dun=
bar%40futurewei.com%7Ce8ca98ef08ee41f2335708d8c88f585d%7C0fee8ff2a3b240189c=
753a1d5591fedc%7C1%7C0%7C637479865284057627%7CUnknown%7CTWFpbGZsb3d8eyJWIjo=
iMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&amp;sdat=
a=3DvgrBT6GHXtqQmmCuzlpxiMG%2BP5lHoVbsKfeC671ZMJ8%3D&amp;reserved=3D0" targ=
et=3D"_blank"><span style=3D"color:#337AB7">https://tools.ietf.org/html/dra=
ft-bestbar-spring-scalable-ns-00</span></a><o:p></o:p></span></p>
</div>
<div>
<p style=3D"margin:0in;box-sizing:border-box;min-height:14px;outline:0px"><=
span style=3D"font-family:&quot;Arial&quot;,sans-serif"><a href=3D"https://=
nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%=
2Fhtml%2Fdraft-decraene-mpls-slid-encoded-entropy-label-id-00&amp;data=3D04=
%7C01%7Clinda.dunbar%40futurewei.com%7Ce8ca98ef08ee41f2335708d8c88f585d%7C0=
fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637479865284067622%7CUnknown%7CTW=
FpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3=
D%7C2000&amp;sdata=3Dbou6PkNKBYw2vpWL1Novlh%2B4Ohfa1lbR8EaeMcjUeJk%3D&amp;r=
eserved=3D0" target=3D"_blank"><span style=3D"color:#337AB7">https://tools.=
ietf.org/html/draft-decraene-mpls-slid-encoded-entropy-label-id-00</span></=
a><o:p></o:p></span></p>
</div>
<div>
<p style=3D"margin:0in;box-sizing:border-box;min-height:14px;outline:0px"><=
span style=3D"font-family:&quot;Arial&quot;,sans-serif"><a href=3D"https://=
nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%=
2Fhtml%2Fdraft-dong-6man-enhanced-vpn-vtn-id-02&amp;data=3D04%7C01%7Clinda.=
dunbar%40futurewei.com%7Ce8ca98ef08ee41f2335708d8c88f585d%7C0fee8ff2a3b2401=
89c753a1d5591fedc%7C1%7C0%7C637479865284067622%7CUnknown%7CTWFpbGZsb3d8eyJW=
IjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&amp;s=
data=3DlsdX%2FQRDJw8%2BJ%2FDgJtG6mErs0DTQnIm1PeqNZbn5oTI%3D&amp;reserved=3D=
0" target=3D"_blank"><span style=3D"color:#337AB7">https://tools.ietf.org/h=
tml/draft-dong-6man-enhanced-vpn-vtn-id-02</span></a><o:p></o:p></span></p>
</div>
<div>
<p><a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3=
A%2F%2Ftools.ietf.org%2Fhtml%2Fdraft-filsfils-spring-srv6-stateless-slice-i=
d-02&amp;data=3D04%7C01%7Clinda.dunbar%40futurewei.com%7Ce8ca98ef08ee41f233=
5708d8c88f585d%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637479865284077=
616%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1=
haWwiLCJXVCI6Mn0%3D%7C2000&amp;sdata=3DK3wuvuGj5haU%2F9q3iAYnAV3STPT5myVK2I=
8Nw4mrciE%3D&amp;reserved=3D0" target=3D"_blank"><span style=3D"color:#337A=
B7">https://tools.ietf.org/html/draft-filsfils-spring-srv6-stateless-slice-=
id-02</span></a>&nbsp;<o:p></o:p></p>
</div>
</blockquote>
<div>
<div>
<ul type=3D"disc">
<li class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-=
alt:auto;mso-list:l1 level1 lfo2">
<span style=3D"font-family:&quot;Arial&quot;,sans-serif">related to the con=
trol plane extensions:</span><o:p></o:p></li></ul>
</div>
</div>
<blockquote style=3D"margin-left:30.0pt;margin-right:0in">
<div>
<div>
<p style=3D"margin:0in;line-height:15.0pt"><span style=3D"font-family:&quot=
;Arial&quot;,sans-serif"><a href=3D"https://nam11.safelinks.protection.outl=
ook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Fdraft-zch-lsr-isis-net=
work-slicing-06&amp;data=3D04%7C01%7Clinda.dunbar%40futurewei.com%7Ce8ca98e=
f08ee41f2335708d8c88f585d%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C6374=
79865284087610%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIi=
LCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&amp;sdata=3DftetWylCnasP1DtpOP44r4xwI=
Ka%2B%2BM1AgV6eB69aLho%3D&amp;reserved=3D0" target=3D"_blank"><span style=
=3D"color:#337AB7">https://tools.ietf.org/html/draft-zch-lsr-isis-network-s=
licing-06</span></a><o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p style=3D"margin:0in;line-height:15.0pt"><span style=3D"font-family:&quot=
;Arial&quot;,sans-serif"><a href=3D"https://nam11.safelinks.protection.outl=
ook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Fdraft-zhu-lsr-isis-sr-=
vtn-flexalgo-01&amp;data=3D04%7C01%7Clinda.dunbar%40futurewei.com%7Ce8ca98e=
f08ee41f2335708d8c88f585d%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C6374=
79865284087610%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIi=
LCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&amp;sdata=3DwnRokkAz33KV3ap%2FZfeygG9=
7xY4fW5o9FjfibQPmQss%3D&amp;reserved=3D0" target=3D"_blank"><span style=3D"=
color:#337AB7">https://tools.ietf.org/html/draft-zhu-lsr-isis-sr-vtn-flexal=
go-01</span></a><o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p style=3D"margin:0in;line-height:15.0pt"><span style=3D"font-family:&quot=
;Arial&quot;,sans-serif"><a href=3D"https://nam11.safelinks.protection.outl=
ook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Fdraft-xie-lsr-isis-sr-=
vtn-mt-02&amp;data=3D04%7C01%7Clinda.dunbar%40futurewei.com%7Ce8ca98ef08ee4=
1f2335708d8c88f585d%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C6374798652=
84097608%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTi=
I6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&amp;sdata=3DGBMS4s8E4vZWfohhaOP%2FTCSS5inBh=
EtEa3GWWS32AAY%3D&amp;reserved=3D0" target=3D"_blank"><span style=3D"color:=
#337AB7">https://tools.ietf.org/html/draft-xie-lsr-isis-sr-vtn-mt-02</span>=
</a><o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p style=3D"margin:0in;line-height:15.0pt"><span style=3D"font-family:&quot=
;Arial&quot;,sans-serif"><a href=3D"https://nam11.safelinks.protection.outl=
ook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Fdraft-peng-lsr-flex-al=
go-l2bundles-05&amp;data=3D04%7C01%7Clinda.dunbar%40futurewei.com%7Ce8ca98e=
f08ee41f2335708d8c88f585d%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C6374=
79865284117593%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIi=
LCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&amp;sdata=3DxJQjtASnEIWrRmkHGU35x9AaK=
KwHS2sPI%2BN%2FTsNmyeU%3D&amp;reserved=3D0" target=3D"_blank"><span style=
=3D"color:#337AB7">https://tools.ietf.org/html/draft-peng-lsr-flex-algo-l2b=
undles-05</span></a><o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p style=3D"margin:0in;line-height:15.0pt"><span style=3D"font-family:&quot=
;Arial&quot;,sans-serif"><a href=3D"https://nam11.safelinks.protection.outl=
ook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Fdraft-dong-lsr-sr-enha=
nced-vpn-04&amp;data=3D04%7C01%7Clinda.dunbar%40futurewei.com%7Ce8ca98ef08e=
e41f2335708d8c88f585d%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C63747986=
5284117593%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJB=
TiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&amp;sdata=3DCy5adYf2aA7MoJHH4xNY7pRSgPYiG=
lqcxyGeQhYFvQE%3D&amp;reserved=3D0" target=3D"_blank"><span style=3D"color:=
#337AB7">https://tools.ietf.org/html/draft-dong-lsr-sr-enhanced-vpn-04</spa=
n></a><o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p style=3D"margin:0in;line-height:15.0pt"><span style=3D"font-family:&quot=
;Arial&quot;,sans-serif"><a href=3D"https://nam11.safelinks.protection.outl=
ook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Fdraft-chen-idr-bgp-ls-=
transport-slice-02&amp;data=3D04%7C01%7Clinda.dunbar%40futurewei.com%7Ce8ca=
98ef08ee41f2335708d8c88f585d%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C6=
37479865284127587%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luM=
zIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&amp;sdata=3D7C%2Bp9XSzzwRT2YFgsNMv=
ZN9cl8arcV0EA1xKUSczgOU%3D&amp;reserved=3D0" target=3D"_blank"><span style=
=3D"color:#337AB7">https://tools.ietf.org/html/draft-chen-idr-bgp-ls-transp=
ort-slice-02</span></a><o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p style=3D"margin:0in;line-height:15.0pt"><span style=3D"font-family:&quot=
;Arial&quot;,sans-serif"><a href=3D"https://nam11.safelinks.protection.outl=
ook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Fdraft-xie-idr-bgpls-sr=
-vtn-mt-02&amp;data=3D04%7C01%7Clinda.dunbar%40futurewei.com%7Ce8ca98ef08ee=
41f2335708d8c88f585d%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637479865=
284127587%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBT=
iI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&amp;sdata=3DEAEEZWGVkgdV37PveAU55PUEf6fwxY=
RwqynFcd8%2FlpU%3D&amp;reserved=3D0" target=3D"_blank"><span style=3D"color=
:#337AB7">https://tools.ietf.org/html/draft-xie-idr-bgpls-sr-vtn-mt-02</spa=
n></a><o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p style=3D"margin:0in;line-height:15.0pt"><span style=3D"font-family:&quot=
;Arial&quot;,sans-serif"><a href=3D"https://nam11.safelinks.protection.outl=
ook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Fdraft-zhu-idr-bgpls-sr=
-vtn-flexalgo-00&amp;data=3D04%7C01%7Clinda.dunbar%40futurewei.com%7Ce8ca98=
ef08ee41f2335708d8c88f585d%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637=
479865284137580%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzI=
iLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&amp;sdata=3DFUAcv2MIb6l%2Fg78Rd9gyMY=
h5qEK3xmH1DwWFLqa6Q6E%3D&amp;reserved=3D0" target=3D"_blank"><span style=3D=
"color:#337AB7">https://tools.ietf.org/html/draft-zhu-idr-bgpls-sr-vtn-flex=
algo-00</span></a><o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p style=3D"margin:0in;line-height:15.0pt"><span style=3D"font-family:&quot=
;Arial&quot;,sans-serif"><a href=3D"https://nam11.safelinks.protection.outl=
ook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Fdraft-chen-idr-bgp-ls-=
transport-slice-srv6-01&amp;data=3D04%7C01%7Clinda.dunbar%40futurewei.com%7=
Ce8ca98ef08ee41f2335708d8c88f585d%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C=
0%7C637479865284137580%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoi=
V2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&amp;sdata=3D1sZQeDHREsTpGJTsX=
7FmMXBxyit5Fm6A80f8vDhMqD8%3D&amp;reserved=3D0" target=3D"_blank"><span sty=
le=3D"color:#337AB7">https://tools.ietf.org/html/draft-chen-idr-bgp-ls-tran=
sport-slice-srv6-01</span></a><o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p style=3D"margin:0in;line-height:15.0pt"><span style=3D"font-family:&quot=
;Arial&quot;,sans-serif"><a href=3D"https://nam11.safelinks.protection.outl=
ook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Fdraft-dong-idr-bgpls-s=
r-enhanced-vpn-02&amp;data=3D04%7C01%7Clinda.dunbar%40futurewei.com%7Ce8ca9=
8ef08ee41f2335708d8c88f585d%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C63=
7479865284147571%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMz=
IiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&amp;sdata=3DA%2Fyot%2FTvLE6pE8J05OA=
QokerlrvDC1NpbVEiWuHdf2w%3D&amp;reserved=3D0" target=3D"_blank"><span style=
=3D"color:#337AB7">https://tools.ietf.org/html/draft-dong-idr-bgpls-sr-enha=
nced-vpn-02</span></a>.<o:p></o:p></span></p>
</div>
</div>
</blockquote>
<div>
<div>
<p style=3D"margin:0in;line-height:15.0pt"><span style=3D"font-family:&quot=
;Arial&quot;,sans-serif">Regards,<o:p></o:p></span></p>
<p style=3D"margin:0in;line-height:15.0pt;box-sizing:border-box;min-height:=
14px;outline:0px">
<span style=3D"font-family:&quot;Arial&quot;,sans-serif">Greg<o:p></o:p></s=
pan></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<p class=3D"MsoNormal">On Sat, Jan 30, 2021 at 2:20 PM Adrian Farrel &lt;<a=
 href=3D"mailto:adrian@olddog.co.uk">adrian@olddog.co.uk</a>&gt; wrote:<o:p=
></o:p></p>
</div>
<blockquote style=3D"border:none;border-left:solid #CCCCCC 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">Thanks, Jim,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">I&#8217;ve been following the enhanced VPN wo=
rk in TEAS and I see it as a key piece of the network slicing work.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">It&#8217;s time that we had some protocol sol=
utions that serve the VPN framework, and this is a suitable starting point.=
 I like that it is not specifying additional
 protocol widgets but has looked at what we already have and is pointing up=
 ways to use those tools to deliver new function.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">I see Robert&#8217;s point about the resource=
 reservation aspects of traffic engineering applied to an SR network, but t=
his is not an insurmountable problem. The question
 might be asked, &#8220;Why would you want to do that?&#8221; but that is a=
 question that (as Yakov would have said) the market can decide. It seems t=
hat there are a couple of vendors and a couple of operators who have an int=
erest.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">So I think we should adopt this draft and see=
 whether we can turn it into something that has great utility.<o:p></o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">Cheers,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">Adrian<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">&nbsp;<o:p></o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b>From:</b> spring &lt;<a href=3D"mailto:spring-bounces@ietf.org"=
 target=3D"_blank">spring-bounces@ietf.org</a>&gt;
<b>On Behalf Of </b>James Guichard<br>
<b>Sent:</b> 27 January 2021 11:47<br>
<b>To:</b> <a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf=
.org</a><br>
<b>Cc:</b> <a href=3D"mailto:spring-chairs@ietf.org" target=3D"_blank">spri=
ng-chairs@ietf.org</a><br>
<b>Subject:</b> [spring] WG Adoption Call for draft-dong-spring-sr-for-enha=
nced-vpn<span lang=3D"EN-GB"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span lang=3D"EN-GB">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">Dear WG:<span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">&nbsp;<span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">This message starts a 2 week WG adoption call for
<a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2=
F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&a=
mp;data=3D04%7C01%7Clinda.dunbar%40futurewei.com%7Ce8ca98ef08ee41f2335708d8=
c88f585d%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637479865284157569%7C=
Unknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiL=
CJXVCI6Mn0%3D%7C2000&amp;sdata=3D18n%2FINEjeHbAkRirnct0YAHxP1neXCY386Yrwwan=
b28%3D&amp;reserved=3D0" target=3D"_blank">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<span lang=3D"EN-GB"><o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">&nbsp;<span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">After review of the document please indicate support (or not) for =
WG adoption to the mailing list and if you are willing to work on the docum=
ent, please state this explicitly. This
 gives the chairs an indication of the energy level of people in the workin=
g group willing to work on this document. Please also provide comments/reas=
ons for your support (or lack thereof) as this is a stronger way to indicat=
e your (non) support as this is
 not a vote.<span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">&nbsp;<span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">Thanks!<span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">&nbsp;<span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">Jim, Bruno &amp; Joel<span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">&nbsp;<span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">&nbsp;<span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto">&nbsp;<span lang=3D"EN-GB"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal">_______________________________________________<br>
spring mailing list<br>
<a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a><br=
>
<a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2=
F%2Fwww.ietf.org%2Fmailman%2Flistinfo%2Fspring&amp;data=3D04%7C01%7Clinda.d=
unbar%40futurewei.com%7Ce8ca98ef08ee41f2335708d8c88f585d%7C0fee8ff2a3b24018=
9c753a1d5591fedc%7C1%7C0%7C637479865284167567%7CUnknown%7CTWFpbGZsb3d8eyJWI=
joiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&amp;sd=
ata=3DFN6H4CR0LRYnTPF3gZuWS8KL88hACbL%2FsBOZYTZyLeQ%3D&amp;reserved=3D0" ta=
rget=3D"_blank">https://www.ietf.org/mailman/listinfo/spring</a><o:p></o:p>=
</p>
</blockquote>
</div>
</div>
</div>
</body>
</html>

--_000_SN6PR13MB23346E332920CB2804C65AA385B39SN6PR13MB2334namp_--


From nobody Fri Feb  5 03:01:03 2021
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From: Loa Andersson <loa@pi.nu>
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Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Working Group,

I have reviewed the draft and believe that it is a good starting point 
for the wg to create the Enhanced VPN standard.

/Loa

On 27/01/2021 19:46, James Guichard wrote:
> Dear WG:
> 
> This message starts a 2 week WG adoption call for 
> https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/ 
> <https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/> ending 
> February 10^th 2021.
> 
> After review of the document please indicate support (or not) for WG 
> adoption to the mailing list and if you are willing to work on the 
> document, please state this explicitly. This gives the chairs an 
> indication of the energy level of people in the working group willing to 
> work on this document. Please also provide comments/reasons for your 
> support (or lack thereof) as this is a stronger way to indicate your 
> (non) support as this is not a vote.
> 
> Thanks!
> 
> Jim, Bruno & Joel
> 
> 
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
> 

-- 

Loa Andersson                        email: loa@pi.nu
Senior MPLS Expert                          loa.pi.nu@gmail.com
Bronze Dragon Consulting             phone: +46 739 81 21 64


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Thread-Topic: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Hi chairs, WG,

Support as a co-author.

Thanks,
Francois

From: spring <spring-bounces@ietf.org> on behalf of James Guichard <james.n=
.guichard@futurewei.com>
Date: Wednesday, 27 January 2021 at 12:47
To: spring@ietf.org <spring@ietf.org>
Cc: spring-chairs@ietf.org <spring-chairs@ietf.org>
Subject: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vp=
n
Dear WG:

This message starts a 2 week WG adoption call for https://datatracker.ietf.=
org/doc/draft-dong-spring-sr-for-enhanced-vpn/ ending February 10th 2021.

After review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, plea=
se state this explicitly. This gives the chairs an indication of the energy=
 level of people in the working group willing to work on this document. Ple=
ase also provide comments/reasons for your support (or lack thereof) as thi=
s is a stronger way to indicate your (non) support as this is not a vote.

Thanks!

Jim, Bruno & Joel




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<p class=3D"MsoNormal"><span lang=3D"EN-US">Hi chairs, WG,<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Support as a co-author.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Francois<o:p></o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:36.0pt">
<b><span style=3D"font-size:12.0pt;color:black">From: </span></b><span styl=
e=3D"font-size:12.0pt;color:black">spring &lt;spring-bounces@ietf.org&gt; o=
n behalf of James Guichard &lt;james.n.guichard@futurewei.com&gt;<br>
<b>Date: </b>Wednesday, 27 January 2021 at 12:47<br>
<b>To: </b>spring@ietf.org &lt;spring@ietf.org&gt;<br>
<b>Cc: </b>spring-chairs@ietf.org &lt;spring-chairs@ietf.org&gt;<br>
<b>Subject: </b>[spring] WG Adoption Call for draft-dong-spring-sr-for-enha=
nced-vpn<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Dear WG:<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">This message starts a 2=
 week WG adoption call for
<a href=3D"https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanc=
ed-vpn/">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">After review of the doc=
ument please indicate support (or not) for WG adoption to the mailing list =
and if you are willing to work on the document, please state this explicitl=
y. This gives the chairs an indication
 of the energy level of people in the working group willing to work on this=
 document. Please also provide comments/reasons for your support (or lack t=
hereof) as this is a stronger way to indicate your (non) support as this is=
 not a vote.<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Thanks!<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Jim, Bruno &amp; Joel<o=
:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
</div>
</body>
</html>

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From: Vishnu Pavan Beeram <vishnupavan@gmail.com>
Date: Fri, 5 Feb 2021 10:43:04 -0600
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To: James Guichard <james.n.guichard@futurewei.com>
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Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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WG, Hi!

<draft-bestbar-spring-scalable-ns> advocates a couple of options for
determining which slice-aggregate the packet belongs to:
(a) Segment Range as Slice Selector
(b) Global Identifier as Slice Selector
In option (a), which is what is relevant
for draft-dong-spring-sr-for-enhanced-vpn, the following is advocated:

   ".. multiple per slice aggregate Prefix-SIDs (Slice Prefix-SIDs) can
   be assigned for the same prefix such that they all share the same IGP
   computed path over one topology and optimized for one algorithm to
   allow the steering of traffic to the same prefix along a path but
   over different slice aggregates.."

I have reviewed the latest version (rev 13) of
draft-dong-spring-sr-for-enhanced-vpn and it is good to see the above point
incorporated in section 2.3. Thanks to the authors for embracing this
important aspect =E2=80=93 it does significantly enhance the scaling story =
for the
proposed solution.

Regards,
-Pavan

On Wed, Jan 27, 2021 at 5:46 AM James Guichard <
james.n.guichard@futurewei.com> wrote:

> Dear WG:
>
>
>
> This message starts a 2 week WG adoption call for
> https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/
> ending February 10th 2021.
>
>
>
> After review of the document please indicate support (or not) for WG
> adoption to the mailing list and if you are willing to work on the
> document, please state this explicitly. This gives the chairs an indicati=
on
> of the energy level of people in the working group willing to work on thi=
s
> document. Please also provide comments/reasons for your support (or lack
> thereof) as this is a stronger way to indicate your (non) support as this
> is not a vote.
>
>
>
> Thanks!
>
>
>
> Jim, Bruno & Joel
>
>
>
>
>
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
>

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<div dir=3D"ltr"><div>WG, Hi!</div><div><br></div><div>&lt;draft-bestbar-sp=
ring-scalable-ns&gt; advocates a couple of options for determining which sl=
ice-aggregate the packet belongs to:</div>	(a)	Segment Range as Slice Selec=
tor<br>	(b)	Global Identifier as Slice Selector<br>In option (a), which is =
what is relevant for=C2=A0draft-dong-spring-sr-for-enhanced-vpn, the follow=
ing is advocated:<br>=C2=A0<br>=C2=A0=C2=A0 &quot;.. multiple per slice agg=
regate Prefix-SIDs (Slice Prefix-SIDs) can<br>=C2=A0=C2=A0 be assigned for =
the same prefix such that they all share the same IGP<br>=C2=A0=C2=A0 compu=
ted path over one topology and optimized for one algorithm to<br>=C2=A0=C2=
=A0 allow the steering of traffic to the same prefix along a path but<br>=
=C2=A0=C2=A0 over different slice aggregates..&quot;<br>=C2=A0<br>I have re=
viewed the latest version (rev 13) of draft-dong-spring-sr-for-enhanced-vpn=
 and it is good to see the above point incorporated in section 2.3. Thanks =
to the authors for embracing this important aspect =E2=80=93 it does signif=
icantly enhance the scaling story for the proposed solution.<br>=C2=A0<br>R=
egards,<br>-Pavan</div><br><div class=3D"gmail_quote"><div dir=3D"ltr" clas=
s=3D"gmail_attr">On Wed, Jan 27, 2021 at 5:46 AM 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"gmail_quote" style=3D"margin:0p=
x 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-US">
<div class=3D"gmail-m_-8705586601431035819WordSection1">
<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 message starts a 2 week WG adoption call for <a=
 href=3D"https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced=
-vpn/" target=3D"_blank">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">After review of the document please indicate support=
 (or not) for WG adoption to the mailing list and if you are willing to wor=
k on the document, please state this explicitly. This gives the chairs an i=
ndication of the energy level of people
 in the working group willing to work on this document. Please also provide=
 comments/reasons for your support (or lack thereof) as this is a stronger =
way to indicate your (non) support as this is not a vote.<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, Bruno &amp; Joel<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>

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

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Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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--_000_5fd1ce994b754bf8b51cc98638b110eestccomsa_
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Hello
I am Supporting  the adoption of this document. The mechanism provided in th=
is document can help us to build customized virtual networks for different t=
ypes of services with diverse performance requirements.


From: spring <spring-bounces@ietf.org> On Behalf Of James Guichard
Sent: Wednesday, January 27, 2021 2:47 PM
To: spring@ietf.org
Cc: spring-chairs@ietf.org
Subject: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn

Dear WG:

This message starts a 2 week WG adoption call for https://datatracker.ietf.o=
rg/doc/draft-dong-spring-sr-for-enhanced-vpn/ ending February 10th 2021.

After review of the document please indicate support (or not) for WG adoptio=
n to the mailing list and if you are willing to work on the document, please=
 state this explicitly. This gives the chairs an indication of the energy le=
vel of people in the working group willing to work on this document. Please=
 also provide comments/reasons for your support (or lack thereof) as this is=
 a stronger way to indicate your (non) support as this is not a vote.

Thanks!

Jim, Bruno & Joel




The information in this email may contain confidential material and it is in=
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/p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"color:black=
">I am Supporting &nbsp;the adoption of this document. The mechanism provide=
d in this document can help us to build customized virtual networks for diff=
erent types of services with diverse performance
 requirements.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0=
in 0in">
<p class=3D"MsoNormal"><b>From:</b> spring &lt;spring-bounces@ietf.org&gt; <=
b>On Behalf Of
</b>James Guichard<br>
<b>Sent:</b> Wednesday, January 27, 2021 2:47 PM<br>
<b>To:</b> spring@ietf.org<br>
<b>Cc:</b> spring-chairs@ietf.org<br>
<b>Subject:</b> [spring] WG Adoption Call for draft-dong-spring-sr-for-enhan=
ced-vpn<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Dear WG:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">This message starts a 2 week WG adoption call for <a=
 href=3D"https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-=
vpn/">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">After review of the document please indicate support=
 (or not) for WG adoption to the mailing list and if you are willing to work=
 on the document, please state this explicitly. This gives the chairs an ind=
ication of the energy level of people
 in the working group willing to work on this document. Please also provide=
 comments/reasons for your support (or lack thereof) as this is a stronger w=
ay to indicate your (non) support as this is not a vote.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks!<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Jim, Bruno &amp; Joel<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>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
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<body>
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The information in this email may contain confidential material and it is in=
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uthorized. If you are not the intended recipient, please delete the email an=
d destroy any copies of it, any disclosure, copying, distribution is prohibi=
ted and may be considered unlawful. Contents of this email and any attachmen=
ts may be altered, Statement and opinions expressed in this email are those=
 of the sender, and do not necessarily  reflect those of Saudi Telecommunica=
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From: "Adrian Farrel" <adrian@olddog.co.uk>
To: "'Joel M. Halpern'" <jmh@joelhalpern.com>, "'Colby Barth'" <barth.colby@gmail.com>, <spring@ietf.org>
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In-Reply-To: <b952ffdd-54a9-ccb2-93c7-fab3fdbf8f23@joelhalpern.com>
Date: Sun, 7 Feb 2021 12:39:44 -0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/4gAmBoEgQofz8CqlQ8RtQF5_-Oc>
Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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I think that, before jumping in to criticise =
draft-dong-spring-sr-for-enhanced-vpn too much for the *potential* for =
state explosion, everyone should read draft-ietf-teas-enhanced-vpn and =
draft-dong-teas-enhanced-vpn-vtn-scalability with some care (as Pavan =
appears to have done :-) to see the difference between a slice and a =
slice. The VTN construct is a virtual network topology with associated =
resources (a macro slice, if you like) that can support multiple network =
slices or enhanced VPNs that are subject to the same class of treatment =
(micro slices, perhaps). The number of VTNs need not be large although, =
my understanding is that the authors do not prevent operators from =
deciding to shoot themselves.

One could, if so minded, call the VTN a "slice aggregate".

Cheers,
Adrian

-----Original Message-----
From: spring <spring-bounces@ietf.org> On Behalf Of Joel M. Halpern
Sent: 02 February 2021 19:54
To: Colby Barth <barth.colby@gmail.com>; spring@ietf.org
Subject: Re: [spring] WG Adoption Call for =
draft-dong-spring-sr-for-enhanced-vpn

Colby, you are, as far as I can tell, correct that the potential for=20
state explosion is extremely risky and requires careful management.=20
That is why the bestbar draft emphasis that the state is abotu slice=20
aggregates, not end-to-end slices, and probably not even individual IETF =

network slices.

Yours,
Joel

On 2/2/2021 2:19 PM, Colby Barth wrote:
> Tarek, indeed =E2=80=A6
>=20
> draft-bestbar-spring-scalable-ns-00 provides a relevant example of the =
rather enormous amount of state the solution described in =
draft-dong-spring-sr-for-enhanced-vpn results in:
>=20
>     "Notably, this approach requires maintaining per slice state for =
each
>     topological element on every router in the network in both the
>     control and data plane.  For example, a network composed of 'N'
>     nodes, where each node has up to 'K' adjacencies to its neighbors, =
a
>     node would have to assign and advertise 'M' Slice Prefix-SIDs and =
'M'
>     Slice Adjacency-SID(s) to each of it 'K' adjacencies.  =
Consequently,
>     a router will have to maintain up to (N+K)*M SIDs in the control
>     plane, and an equal number of label routes in its forwarding =
plane."
>=20
>=20
> Put in practical terms, this implicitly limits the number of VTNs or, =
in draft-bestbar-teas-ns-packet-01 terminology, the number of Slice =
aggregates that can be offered.  It also introduces a dependency between =
the network size and the number of VTNs.  i.e. the larger the network, =
the smaller the number of VTNs that can be supported.
>=20
> =E2=80=94Colby
>=20
>> On Feb 2, 2021, at 12:54 PM, Tarek Saad =
<tsaad=3D40juniper.net@dmarc.ietf.org> wrote:
>>
>> Hi Eduard,
>>  =20
>> Inline..
>>  =20
>> On 2/2/21, 10:50 AM, "spring on behalf of Vasilenko Eduard" =
<spring-bounces@ietf.org on behalf of vasilenko.eduard@huawei.com> =
wrote:
>>  =20
>> Hi all,
>> There is the general trend to encode the action into the packet, not =
to distribute states in the control plane for all possible traffic =
types. Granularity, programmability are better.
>>  =20
>> [TS]: Indeed, we are in agreement on encoding the information in =
packet as opposed to distributing states in the control plane. In =
draft-bestbar-spring-scalable-ns, a separate ID inside the packet is =
proposed to carry the needed information. However, this draft =
<draft-dong-spring-sr-for-enhanced-vpn> is proposing distributing per =
VTN state in the network which is completely against your argument ...
>>  =20
>> Regards,
>> Tarek
>>  =20
>>  =20
>>  =20
>> This type of virtualization is fully in-line with this trend.
>> Support.
>> Eduard
>> From: spring [mailto:spring-bounces@ietf.org] On Behalf Of James =
Guichard
>> Sent: Wednesday, January 27, 2021 12:47 PM
>> To: spring@ietf.org
>> Cc: spring-chairs@ietf.org
>> Subject: [spring] WG Adoption Call for =
draft-dong-spring-sr-for-enhanced-vpn
>>  =20
>> Dear WG:
>>  =20
>> This message starts a 2 week WG adoption call for =
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/ =
ending February 10th 2021.
>>  =20
>> After review of the document please indicate support (or not) for WG =
adoption to the mailing list and if you are willing to work on the =
document, please state this explicitly. This gives the chairs an =
indication of the energy level of people in the working group willing to =
work on this document. Please also provide comments/reasons for your =
support (or lack thereof) as this is a stronger way to indicate your =
(non) support as this is not a vote.
>>  =20
>> Thanks!
>>  =20
>> Jim, Bruno & Joel
>>  =20
>>  =20
>>  =20
>>
>> Juniper Business Use Only
>>
>> _______________________________________________
>> spring mailing list
>> spring@ietf.org
>> https://www.ietf.org/mailman/listinfo/spring
>=20

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


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From: Tianran Zhou <zhoutianran@huawei.com>
To: peng.shaofu <peng.shaofu@zte.com.cn>, james.n.guichard <james.n.guichard@futurewei.com>
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<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dgb2312">
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</head>
<body>
<div style=3D"font-family:Calibri,Helvetica!important; font-size:17.0px; co=
lor:#333333">
<span style=3D"color:#333333; font-size:17.0px">&quot;</span><span style=3D=
"color:#333333; font-size:17.0px">Thus,&nbsp;from&nbsp;a&nbsp;purely&nbsp;t=
echnical&nbsp;point&nbsp;of&nbsp;view,&nbsp;I&nbsp;see&nbsp;no&nbsp;reason&=
nbsp;for&nbsp;this&nbsp;document&nbsp;to&nbsp;be&nbsp;adopted.</span><span =
style=3D"color:#333333; font-size:17.0px">=A1=B1</span><br>
<br>
<br>
<span style=3D"color:#333333; font-size:17.0px">Could&nbsp;you&nbsp;please&=
nbsp;explain&nbsp;the&nbsp;technical&nbsp;point&nbsp;why&nbsp;this&nbsp;doc=
ument&nbsp;can=A1=AFt&nbsp;be&nbsp;adopted?</span><br>
<br>
<span style=3D"color:#333333; font-size:17.0px">IMO,&nbsp;all&nbsp;your&nbs=
p;statements&nbsp;just&nbsp;show&nbsp;support&nbsp;and&nbsp;consensus&nbsp;=
on&nbsp;the&nbsp;technology.</span><br>
<br>
<span style=3D"color:#333333; font-size:17.0px">Tianran&nbsp;</span><br>
<br>
<br>
<span style=3D"color:#333333; font-size:17.0px">
<hr id=3D"client_signature_separator" style=3D"border-top:dotted 1px">
</span><br>
<span style=3D"color:#333333; font-size:17.0px">Sent&nbsp;from&nbsp;WeLink<=
/span><br>
</div>
<div name=3D"AnyOffice-Background-Image" style=3D"border-top:1px solid #B5C=
4DF; padding:8px">
<div><b>=B7=A2=BC=FE=C8=CB=A3=BA </b>peng.shaofu&lt;<a href=3D"mailto:peng.=
shaofu@zte.com.cn">peng.shaofu@zte.com.cn</a>&gt;</div>
<div><b>=CA=D5=BC=FE=C8=CB=A3=BA </b>james.n.guichard&lt;<a href=3D"mailto:=
james.n.guichard@futurewei.com">james.n.guichard@futurewei.com</a>&gt;</div=
>
<div><b>=B3=AD=CB=CD=A3=BA </b>spring&lt;<a href=3D"mailto:spring@ietf.org"=
>spring@ietf.org</a>&gt;;spring-chairs&lt;<a href=3D"mailto:spring-chairs@i=
etf.org">spring-chairs@ietf.org</a>&gt;</div>
<div><b>=D6=F7=CC=E2=A3=BA </b>Re: [spring] WG Adoption Call for draft-dong=
-spring-sr-for-enhanced-vpn</div>
<div><b>=CA=B1=BC=E4=A3=BA </b>2021-02-07 11:53:59</div>
<br>
</div>
<div>
<div class=3D"zcontentRow">
<p style=3D"font-size:18px; font-family:arial"><br>
</p>
<p>Hi WG/authors,</p>
<p><br>
</p>
<p>I have to point out that the VTN-ID in draft-dong-spring-sr-for-enhanced=
-vpn is actually the AII in draft-peng-teas-network-slicing, just a new nam=
e. That can be seen from the evolution of the historical versions of the th=
ese two drafts.&nbsp;</p>
<p><br>
</p>
<p>I draw your attention to draft draft-peng-teas-network-slicing which ana=
lyzes in detail the reasons for the introduction of slice identifier (AII) =
in the network, and maintains the resource partition of each slice and the =
allocation of SID per AII in the
 network.&nbsp;All this happened before&nbsp;<span style=3D"line-height:21p=
x">draft-dong-spring-sr-for-enhanced-vpn.</span></p>
<p><br>
</p>
<p>In addition, the idea that multiple slices share the same virtual topolo=
gy (such as flex-algo) is also copied from draft-bestbar-teas-ns-packet, wh=
ich can significantly reduce the state in the network, especially without m=
aintaining SPT per slice, which
 means that multiple SIDs per slice can share the forwarding action of SPT =
per VN and at the same time can do resource guarantee by SID per slice (or =
slice-id in packet).</p>
<p><br>
</p>
<p>Thus, from a purely technical point of view, I see no reason for this do=
cument to be adopted.&nbsp;</p>
<p><br>
</p>
<p>Regards,</p>
<p>PSF</p>
<p style=3D"font-size:18px; font-family:arial"><br>
</p>
<p style=3D"font-size:18px; font-family:arial"><br>
</p>
<p><br>
</p>
<div>
<div class=3D"zhistoryRow" style=3D"display:block">
<div class=3D"zhistoryDes" style=3D"width:100%; height:28px; line-height:28=
px; background-color:#E0E5E9; color:#1388FF; text-align:center">
=D4=AD=CA=BC=D3=CA=BC=FE</div>
<div id=3D"zwriteHistoryContainer">
<div class=3D"control-group zhistoryPanel">
<div class=3D"zhistoryHeader" style=3D"padding:8px; background-color:#F5F6F=
8">
<div><strong>=B7=A2=BC=FE=C8=CB=A3=BA</strong><span class=3D"zreadUserName"=
>JamesGuichard</span></div>
<div><strong>=CA=D5=BC=FE=C8=CB=A3=BA</strong><span class=3D"zreadUserName"=
 style=3D"display:inline">spring@ietf.org;</span></div>
<div><strong>=B3=AD=CB=CD=C8=CB=A3=BA</strong><span class=3D"zreadUserName"=
 style=3D"display:inline">spring-chairs@ietf.org;</span></div>
<div><strong>=C8=D5 =C6=DA =A3=BA</strong><span class=3D"">2021=C4=EA01=D4=
=C227=C8=D5 19:47</span></div>
<div><strong>=D6=F7 =CC=E2 =A3=BA</strong><span class=3D"zreadTitle"><stron=
g>[spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn</stro=
ng></span></div>
</div>
<div class=3D"zhistoryContent">
<div>_______________________________________________<br>
spring&nbsp;mailing&nbsp;list<br>
spring@ietf.org<br>
https://www.ietf.org/mailman/listinfo/spring<br>
<br>
<div class=3D"WordSection1">
<p class=3D"MsoNormal">Dear WG:</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">This message starts a 2 week WG adoption call for <a=
 href=3D"https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced=
-vpn/" target=3D"_blank">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">After review of the document please indicate support=
 (or not) for WG adoption to the mailing list and if you are willing to wor=
k on the document, please state this explicitly. This gives the chairs an i=
ndication of the energy level of people
 in the working group willing to work on this document. Please also provide=
 comments/reasons for your support (or lack thereof) as this is a stronger =
way to indicate your (non) support as this is not a vote.</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">Thanks!</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">Jim, Bruno &amp; Joel</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal">&nbsp;</p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<p><br>
</p>
</div>
</div>
</body>
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From: Ron Bonica <rbonica@juniper.net>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/3CBUIZ23v92rJEcxjy6LHfSPjBY>
Subject: [spring] FW: New Version Notification for draft-bonica-spring-srv6-end-dtm-01.txt
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From: Jeff Tantsura <jefftant.ietf@gmail.com>
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Date: Sun, 7 Feb 2021 22:51:37 -0800
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To: Ron Bonica <rbonica=40juniper.net@dmarc.ietf.org>
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Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-srv6-end-dtm-01.txt
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Hi Ron,

Very useful document, thanks!

Question wrt processing:
As described in the draft:
=E2=80=9CA SID instance is associated with SR-MPLS label stack and outgoing i=
nterface.=E2=80=9D

I=E2=80=99d think that outgoing interface would be recursively resolved base=
d on the top SID (and could change based on topological semantics).
Could you please elaborate?

Thanks!


Cheers,
Jeff

> On Feb 7, 2021, at 08:46, Ron Bonica <rbonica=3D40juniper.net@dmarc.ietf.o=
rg> wrote:
>=20
> =EF=BB=BF
> Please review and comment
>=20
>=20
> Juniper Business Use Only
>=20
>> -----Original Message-----
>> From: internet-drafts@ietf.org <internet-drafts@ietf.org>
>> Sent: Sunday, February 7, 2021 11:41 AM
>> To: Greg Mirsky <gregimirsky@gmail.com>; Peng Shaofu
>> <peng.shaofu@zte.com.cn>; Ron Bonica <rbonica@juniper.net>; Shaofu Peng
>> <peng.shaofu@zte.com.cn>; Shraddha Hegde <shraddha@juniper.net>; EXT-
>> zhang.zheng@zte.com.cn <zhang.zheng@zte.com.cn>
>> Subject: New Version Notification for draft-bonica-spring-srv6-end-dtm-01=
.txt
>>=20
>> [External Email. Be cautious of content]
>>=20
>>=20
>> A new version of I-D, draft-bonica-spring-srv6-end-dtm-01.txt
>> has been successfully submitted by Ron Bonica and posted to the IETF
>> repository.
>>=20
>> Name:           draft-bonica-spring-srv6-end-dtm
>> Revision:       01
>> Title:          The SRv6 END.DTM Segment Type
>> Document date:  2021-02-07
>> Group:          Individual Submission
>> Pages:          7
>> URL:   https://www.ietf.org/archive/id/draft-bonica-spring-srv6-end-dtm-0=
1.txt
>> Status: https://datatracker.ietf.org/doc/draft-bonica-spring-srv6-end-dtm=

>> Htmlized:  https://datatracker.ietf.org/doc/html/draft-bonica-spring-srv6=
-end-dtm
>> Htmlized:      https://tools.ietf.org/html/draft-bonica-spring-srv6-end-d=
tm-01
>> Diff:  https://www.ietf.org/rfcdiff?url2=3Ddraft-bonica-spring-srv6-end-d=
tm-01
>>=20
>> Abstract:
>>   This document describes a new SRv6 segment type, called END.DTM.  The
>>   END.DTM segment type supports inter-working between SRv6 and SR-MPLS.
>>   Like any segment type, END.DTM contains a function and arguments.
>>   The function causes the processing SRv6 node to remove an SRv6 header
>>   and impose an SR-MPLS label stack.  The arguments determine MPLS-
>>   label stack contents.
>>=20
>>=20
>>=20
>>=20
>> Please note that it may take a couple of minutes from the time of submiss=
ion
>> until the htmlized version and diff are available at tools.ietf.org.
>>=20
>> The IETF Secretariat
>>=20
> _______________________________________________
> spring mailing list
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From: Shunsuke Homma <shunsuke.homma.ietf@gmail.com>
Date: Tue, 9 Feb 2021 01:04:50 +0900
Message-ID: <CAKr2Fb-1oZMaSd=1t-nyWs_7NPyi4mmH5MwKqciN=8RhpyREbg@mail.gmail.com>
To: James Guichard <james.n.guichard@futurewei.com>
Cc: "spring@ietf.org" <spring@ietf.org>, "spring-chairs@ietf.org" <spring-chairs@ietf.org>
Content-Type: multipart/alternative; boundary="00000000000009d60505bad55517"
Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/0V81UiNdTjSkZPwe_MnxlgUg-3k>
Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Hi WG,

I think that this document is good enough as starting point for the WG, and
I support the adoption. There are many drafts related to network slice with
SR (e.g., SR + Flex-algo, draft-bestbar-spring-scalable-ns, etc.) and I
hope it will be clarified which is the best in future work.

The following are my comments to the draft.
- The example describes three isolated VTNs. I assume (hard) isolation will
cause split loss, and oversubscription will be sometimes needed. Hence, it
may be better to allow a resource-aware SID to belong to multiple VTNs.

- From network slicing (i.e., NaaS model) perspective, I assume visibility
will be especially important. As one more important requirement, network
operators want to provide only information of the VTN whose customer uses
to that customer. For example, if a customer gets VTN information with
BGP-LS, some mechanisms to prevent to leak other VTNs information in BGP-LS
would be needed.

- There is a typo in figure2. The adj-SID of the link from 203 to 204 in
green VTN should be 2002.

Regards,

Shunsuke

On Wed, Jan 27, 2021 at 8:47 PM James Guichard <
james.n.guichard@futurewei.com> wrote:

> Dear WG:
>
>
>
> This message starts a 2 week WG adoption call for
> https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/
> ending February 10th 2021.
>
>
>
> After review of the document please indicate support (or not) for WG
> adoption to the mailing list and if you are willing to work on the
> document, please state this explicitly. This gives the chairs an indication
> of the energy level of people in the working group willing to work on this
> document. Please also provide comments/reasons for your support (or lack
> thereof) as this is a stronger way to indicate your (non) support as this
> is not a vote.
>
>
>
> Thanks!
>
>
>
> Jim, Bruno & Joel
>
>
>
>
>
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
>

--00000000000009d60505bad55517
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi WG,<br><br>I think that this document is good enough as=
 starting point for the WG, and I support the adoption. There are many draf=
ts related to network slice with SR (e.g., SR + Flex-algo, draft-bestbar-sp=
ring-scalable-ns, etc.) and I hope it will be clarified which is the best i=
n future work.<br><br>The following are my comments to the draft.<br>- The =
example describes three isolated VTNs. I assume (hard) isolation will cause=
 split loss, and oversubscription will be sometimes needed. Hence, it may b=
e better to allow a resource-aware SID to belong to multiple VTNs.<br><br>-=
 From network slicing (i.e., NaaS model) perspective, I assume visibility w=
ill be especially important. As one more important requirement, network ope=
rators want to provide only information of the VTN whose customer uses to t=
hat customer. For example, if a customer gets VTN information with BGP-LS, =
some mechanisms to prevent to leak other VTNs information in BGP-LS would b=
e needed.<br><br>- There is a typo in figure2. The adj-SID of the link from=
 203 to 204 in green VTN should be 2002.<br><br>Regards,<br><br>Shunsuke<br=
></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr"=
>On Wed, Jan 27, 2021 at 8:47 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"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;=
border-left:1px solid rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-US">
<div class=3D"gmail-m_778479985135016564WordSection1">
<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 message starts a 2 week WG adoption call for <a=
 href=3D"https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced=
-vpn/" target=3D"_blank">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">After review of the document please indicate support=
 (or not) for WG adoption to the mailing list and if you are willing to wor=
k on the document, please state this explicitly. This gives the chairs an i=
ndication of the energy level of people
 in the working group willing to work on this document. Please also provide=
 comments/reasons for your support (or lack thereof) as this is a stronger =
way to indicate your (non) support as this is not a vote.<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, Bruno &amp; Joel<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>

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

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From: "BRUNGARD, DEBORAH A" <db3546@att.com>
To: "teas@ietf.org" <teas@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: more on IDs for slices
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/8bQvD0PmiUi7XVHutDhxZiXiJWI>
Subject: [spring] more on IDs for slices
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Hi,

Not sure if you are aware, there was a BoF proposed on using an identifier =
to signal user requirements (APN) in a slice, APN BoF. It was decided it wo=
uld be better to first have it further discussed at IETF110's RTGWG as it w=
ould allow for a broader coverage:
https://www.ietf.org/blog/ietf110-bofs/

Considering the current discussion in spring and the work already on-going =
in teas on IDs and "what is a slice", and to help focus the discussion at t=
he meeting, I wanted to bring the following drafts to your attention. I hav=
e asked the authors to help us understand the gaps with the on-going work n=
ot being addressed and what new work is needed. The authors have done a lot=
 of work, this is just a selection:

https://www.ietf.org/archive/id/draft-peng-apn-scope-gap-analysis-00.txt
https://www.ietf.org/archive/id/draft-li-apn-framework-01.txt
https://www.ietf.org/archive/id/draft-li-apn-problem-statement-usecases-01.=
txt

If you search documents on APN, you will find more.

Happy reading,
Deborah


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<p class=3D"MsoNormal">Hi,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Not sure if you are aware, there was a BoF proposed =
on using an identifier to signal user requirements (APN) in a slice, APN Bo=
F. It was decided it would be better to first have it further discussed at =
IETF110&#8217;s RTGWG as it would allow
 for a broader coverage:<o:p></o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://www.ietf.org/blog/ietf110-bofs/">=
https://www.ietf.org/blog/ietf110-bofs/</a><o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Considering the current discussion in spring and the=
 work already on-going in teas on IDs and &#8220;what is a slice&#8221;, an=
d to help focus the discussion at the meeting, I wanted to bring the follow=
ing drafts to your attention. I have asked the
 authors to help us understand the gaps with the on-going work not being ad=
dressed and what new work is needed. The authors have done a lot of work, t=
his is just a selection:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://www.ietf.org/archive/id/draft-pen=
g-apn-scope-gap-analysis-00.txt">https://www.ietf.org/archive/id/draft-peng=
-apn-scope-gap-analysis-00.txt</a><o:p></o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://www.ietf.org/archive/id/draft-li-=
apn-framework-01.txt">https://www.ietf.org/archive/id/draft-li-apn-framewor=
k-01.txt</a><o:p></o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://www.ietf.org/archive/id/draft-li-=
apn-problem-statement-usecases-01.txt">https://www.ietf.org/archive/id/draf=
t-li-apn-problem-statement-usecases-01.txt</a><o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">If you search documents on APN, you will find more.<=
o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Happy reading,<o:p></o:p></p>
<p class=3D"MsoNormal">Deborah<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</body>
</html>

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To: Jeff Tantsura <jefftant.ietf@gmail.com>, Ron Bonica <rbonica=40juniper.net@dmarc.ietf.org>
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From: Loa Andersson <loa@pi.nu>
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Date: Tue, 9 Feb 2021 12:51:13 +0800
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Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-srv6-end-dtm-01.txt
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Jeff,


On 08/02/2021 14:51, Jeff Tantsura wrote:
> Hi Ron,
> 
> Very useful document, thanks!
> 
> Question wrt processing:
> As described in the draft:
> â€œA SID instance is associated with SR-MPLS label stack and outgoing interface.â€
> 
> Iâ€™d think that outgoing interface would be recursively resolved based on the top SID (and could change based on topological semantics).
> Could you please elaborate?

What exactly do yo mean by "recursively"?

/Loa
> 
> Thanks!
> 
> 
> Cheers,
> Jeff
> 
>> On Feb 7, 2021, at 08:46, Ron Bonica <rbonica=40juniper.net@dmarc.ietf.org> wrote:
>>
>> ï»¿
>> Please review and comment
>>
>>
>> Juniper Business Use Only
>>
>>> -----Original Message-----
>>> From: internet-drafts@ietf.org <internet-drafts@ietf.org>
>>> Sent: Sunday, February 7, 2021 11:41 AM
>>> To: Greg Mirsky <gregimirsky@gmail.com>; Peng Shaofu
>>> <peng.shaofu@zte.com.cn>; Ron Bonica <rbonica@juniper.net>; Shaofu Peng
>>> <peng.shaofu@zte.com.cn>; Shraddha Hegde <shraddha@juniper.net>; EXT-
>>> zhang.zheng@zte.com.cn <zhang.zheng@zte.com.cn>
>>> Subject: New Version Notification for draft-bonica-spring-srv6-end-dtm-01.txt
>>>
>>> [External Email. Be cautious of content]
>>>
>>>
>>> A new version of I-D, draft-bonica-spring-srv6-end-dtm-01.txt
>>> has been successfully submitted by Ron Bonica and posted to the IETF
>>> repository.
>>>
>>> Name:           draft-bonica-spring-srv6-end-dtm
>>> Revision:       01
>>> Title:          The SRv6 END.DTM Segment Type
>>> Document date:  2021-02-07
>>> Group:          Individual Submission
>>> Pages:          7
>>> URL:   https://www.ietf.org/archive/id/draft-bonica-spring-srv6-end-dtm-01.txt
>>> Status: https://datatracker.ietf.org/doc/draft-bonica-spring-srv6-end-dtm
>>> Htmlized:  https://datatracker.ietf.org/doc/html/draft-bonica-spring-srv6-end-dtm
>>> Htmlized:      https://tools.ietf.org/html/draft-bonica-spring-srv6-end-dtm-01
>>> Diff:  https://www.ietf.org/rfcdiff?url2=draft-bonica-spring-srv6-end-dtm-01
>>>
>>> Abstract:
>>>    This document describes a new SRv6 segment type, called END.DTM.  The
>>>    END.DTM segment type supports inter-working between SRv6 and SR-MPLS.
>>>    Like any segment type, END.DTM contains a function and arguments.
>>>    The function causes the processing SRv6 node to remove an SRv6 header
>>>    and impose an SR-MPLS label stack.  The arguments determine MPLS-
>>>    label stack contents.
>>>
>>>
>>>
>>>
>>> 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.
>>>
>>> The IETF Secretariat
>>>
>> _______________________________________________
>> spring mailing list
>> spring@ietf.org
>> https://www.ietf.org/mailman/listinfo/spring
> 
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
> 

-- 

Loa Andersson                        email: loa@pi.nu
Senior MPLS Expert                          loa.pi.nu@gmail.com
Bronze Dragon Consulting             phone: +46 739 81 21 64


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From: Yingzhen Qu <yingzhen.ietf@gmail.com>
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To: James Guichard <james.n.guichard@futurewei.com>, "spring@ietf.org" <spring@ietf.org>
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Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Hi,

I support the WG adoption of this draft, and I believe it=E2=80=99s a =
good starting point for the WG to work on this topic, and see how =
existing technologies can be integrated to provide new capabilities.

Resource reservation has always been a controversial topic, whether it =
is needed, or efficient, or can it scale? Can we just deliver low =
latency service with high bandwidth? All these are valid questions, as a =
WG we can continue to improve the solutions and make the deployments =
easier. As Adrian said the market will decide whether this is the right =
technology or the right timing.=20

So I support the adoption of this draft and I=E2=80=99m willing to work =
on it.

Thanks,
Yingzhen


> =20
> =20
> From: spring <spring-bounces@ietf.org> On Behalf Of James Guichard
> Sent: Wednesday, January 27, 2021 5:47 AM
> To: spring@ietf.org
> Cc: spring-chairs@ietf.org
> Subject: [spring] WG Adoption Call for =
draft-dong-spring-sr-for-enhanced-vpn
> =20
> Dear WG:
> =20
> This message starts a 2 week WG adoption call for =
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/ =
<https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/> =
ending February 10th 2021.
> =20
> After review of the document please indicate support (or not) for WG =
adoption to the mailing list and if you are willing to work on the =
document, please state this explicitly. This gives the chairs an =
indication of the energy level of people in the working group willing to =
work on this document. Please also provide comments/reasons for your =
support (or lack thereof) as this is a stronger way to indicate your =
(non) support as this is not a vote.
> =20
> Thanks!
> =20
> Jim, Bruno & Joel
> =20
> =20
> =20
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring


--Apple-Mail=_C2D23436-4C5A-4ED7-8D53-40868F72543F
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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; line-break: after-white-space;" =
class=3D""><div>Hi,</div><div><br class=3D""></div><div>I support the WG =
adoption of this draft, and I believe it=E2=80=99s a good starting point =
for the WG to work on this topic, and see how existing technologies can =
be integrated to provide new capabilities.</div><div><br =
class=3D""></div><div>Resource reservation has always been a =
controversial topic, whether it is needed, or efficient, or can it =
scale? Can we just deliver low latency service with high bandwidth? All =
these are valid questions, as a WG we can continue to improve the =
solutions and make the deployments easier. As Adrian said the market =
will decide whether this is the right technology or the right =
timing.&nbsp;</div><div><br class=3D""></div><div>So I support the =
adoption of this draft and I=E2=80=99m willing to work on =
it.</div><div><br =
class=3D""></div><div>Thanks,</div><div>Yingzhen</div><div><br =
class=3D""></div><div><br class=3D""><blockquote type=3D"cite" =
class=3D""><div lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72" =
style=3D"word-wrap:break-word" class=3D""><div =
class=3D"WordSection1"><span style=3D"font-family: Calibri, sans-serif; =
font-size: 11pt;" class=3D"">&nbsp;</span><br class=3D""><p =
class=3D"MsoNormal"><o:p class=3D"">&nbsp;</o:p></p>
<div class=3D"">
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt =
0in 0in 0in" class=3D""><p class=3D"MsoNormal"><b class=3D"">From:</b> =
spring &lt;<a href=3D"mailto:spring-bounces@ietf.org" =
class=3D"">spring-bounces@ietf.org</a>&gt; <b class=3D"">On Behalf Of
</b>James Guichard<br class=3D"">
<b class=3D"">Sent:</b> Wednesday, January 27, 2021 5:47 AM<br class=3D"">=

<b class=3D"">To:</b> <a href=3D"mailto:spring@ietf.org" =
class=3D"">spring@ietf.org</a><br class=3D"">
<b class=3D"">Cc:</b> <a href=3D"mailto:spring-chairs@ietf.org" =
class=3D"">spring-chairs@ietf.org</a><br class=3D"">
<b class=3D"">Subject:</b> [spring] WG Adoption Call for =
draft-dong-spring-sr-for-enhanced-vpn<o:p class=3D""></o:p></p>
</div>
</div><p class=3D"MsoNormal"><o:p class=3D"">&nbsp;</o:p></p><p =
class=3D"MsoNormal">Dear WG:<o:p class=3D""></o:p></p><p =
class=3D"MsoNormal"><o:p class=3D"">&nbsp;</o:p></p><p =
class=3D"MsoNormal">This message starts a 2 week WG adoption call for <a =
href=3D"https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced=
-vpn/" class=3D"">
=
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a=
> ending February 10<sup class=3D"">th</sup> 2021.<o:p =
class=3D""></o:p></p><p class=3D"MsoNormal"><o:p =
class=3D"">&nbsp;</o:p></p><p class=3D"MsoNormal">After review of the =
document please indicate support (or not) for WG adoption to the mailing =
list and if you are willing to work on the document, please state this =
explicitly. This gives the chairs an indication of the energy level of =
people
 in the working group willing to work on this document. Please also =
provide comments/reasons for your support (or lack thereof) as this is a =
stronger way to indicate your (non) support as this is not a vote.<o:p =
class=3D""></o:p></p><p class=3D"MsoNormal"><o:p =
class=3D"">&nbsp;</o:p></p><p class=3D"MsoNormal">Thanks!<o:p =
class=3D""></o:p></p><p class=3D"MsoNormal"><o:p =
class=3D"">&nbsp;</o:p></p><p class=3D"MsoNormal">Jim, Bruno &amp; =
Joel<o:p class=3D""></o:p></p><p class=3D"MsoNormal"><o:p =
class=3D"">&nbsp;</o:p></p><p class=3D"MsoNormal"><o:p =
class=3D"">&nbsp;</o:p></p><p class=3D"MsoNormal"><o:p =
class=3D"">&nbsp;</o:p></p>
</div>
</div>

_______________________________________________<br class=3D"">spring =
mailing list<br class=3D""><a href=3D"mailto:spring@ietf.org" =
class=3D"">spring@ietf.org</a><br =
class=3D"">https://www.ietf.org/mailman/listinfo/spring<br =
class=3D""></blockquote></div><br class=3D""><style class=3D""><!--
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	{mso-style-priority:99;
	color:#0563C1;
	text-decoration:underline;}
span.EmailStyle19
	{mso-style-type:personal-reply;
	font-family:"Calibri",sans-serif;
	color:windowtext;}
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	{size:8.5in 11.0in;
	margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
	{page:WordSection1;}
--></style></body></html>=

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From: "Dongjie (Jimmy)" <jie.dong@huawei.com>
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--_000_9ee54ef553b64a24a6f5e51bee02f63ehuaweicom_--


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From: Takuya Miyasaka <ta-miyasaka@kddi-research.jp>
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Date: Tue, 9 Feb 2021 16:37:49 +0900
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Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-srv6-end-dtm-01.txt
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Hi Ron,

I think this new SRv6 endpoint behavior is very useful to connect an 
SRv6 island and an SR-MPLS island. I have two comments.

In this draft, you introduced the End.DTM as a new "segment type", but 
according to draft-ietf-spring-srv6-network-programming draft I think 
this should be "endpoint behavior".

Section.1 says "The arguments determine MPLS-label stack contents and 
Transport Class of the MPLS Tunnel." I was interested in this feature, 
but there is no detailed description in Section.4. Could you elaborate 
on this feature in the future version? I also want to clarify the 
meaning of "Transport Class of the MPLS Tunnel".

Thanks,
Takuya

On 2021/02/08 1:46, Ron Bonica wrote:
> Please review and comment
>
>
> Juniper Business Use Only
>
>> -----Original Message-----
>> From: internet-drafts@ietf.org <internet-drafts@ietf.org>
>> Sent: Sunday, February 7, 2021 11:41 AM
>> To: Greg Mirsky <gregimirsky@gmail.com>; Peng Shaofu
>> <peng.shaofu@zte.com.cn>; Ron Bonica <rbonica@juniper.net>; Shaofu Peng
>> <peng.shaofu@zte.com.cn>; Shraddha Hegde <shraddha@juniper.net>; EXT-
>> zhang.zheng@zte.com.cn <zhang.zheng@zte.com.cn>
>> Subject: New Version Notification for draft-bonica-spring-srv6-end-dtm-01.txt
>>
>> [External Email. Be cautious of content]
>>
>>
>> A new version of I-D, draft-bonica-spring-srv6-end-dtm-01.txt
>> has been successfully submitted by Ron Bonica and posted to the IETF
>> repository.
>>
>> Name:           draft-bonica-spring-srv6-end-dtm
>> Revision:       01
>> Title:          The SRv6 END.DTM Segment Type
>> Document date:  2021-02-07
>> Group:          Individual Submission
>> Pages:          7
>> URL:   https://www.ietf.org/archive/id/draft-bonica-spring-srv6-end-dtm-01.txt
>> Status: https://datatracker.ietf.org/doc/draft-bonica-spring-srv6-end-dtm
>> Htmlized:  https://datatracker.ietf.org/doc/html/draft-bonica-spring-srv6-end-dtm
>> Htmlized:      https://tools.ietf.org/html/draft-bonica-spring-srv6-end-dtm-01
>> Diff:  https://www.ietf.org/rfcdiff?url2=draft-bonica-spring-srv6-end-dtm-01
>>
>> Abstract:
>>     This document describes a new SRv6 segment type, called END.DTM.  The
>>     END.DTM segment type supports inter-working between SRv6 and SR-MPLS.
>>     Like any segment type, END.DTM contains a function and arguments.
>>     The function causes the processing SRv6 node to remove an SRv6 header
>>     and impose an SR-MPLS label stack.  The arguments determine MPLS-
>>     label stack contents.
>>
>>
>>
>>
>> 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.
>>
>> The IETF Secretariat
>>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring


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From: "Pengshuping (Peng Shuping)" <pengshuping@huawei.com>
To: "spring@ietf.org" <spring@ietf.org>
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Dear all,



We will continue to using the Google Form to collect presentation slot requ=
ests in the SPRING WG for this IETF110. Please fill in your request in the =
following Form.



https://docs.google.com/forms/d/e/1FAIpQLSfx2a78nDG_3uAhy2Piz665JY668T6I5uF=
Av8l0Mrb3SOSy0w/viewform<https://nam11.safelinks.protection.outlook.com/?ur=
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If there is any issue for you to access this Form, please send your request=
 directly to spring-chairs@ietf.org<mailto:spring-chairs@ietf.org>.



Thank you!



Best regards,

Shuping


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<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529">Dear all,<o:p></o:p></span></pre>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529"><o:p>&nbsp;</o:p></span></pre>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529">We will continue to using the Google=
 Form to collect presentation slot requests in the SPRING WG for this IETF1=
10. Please fill in your request in the following Form.<o:p></o:p></span></p=
re>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529"><o:p>&nbsp;</o:p></span></pre>
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<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
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<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529">If there is any issue for you to acc=
ess this Form, please send your request directly to <a href=3D"mailto:sprin=
g-chairs@ietf.org"><span style=3D"color:#337AB7">spring-chairs@ietf.org</sp=
an></a>.<o:p></o:p></span></pre>
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pt;font-family:Consolas;color:#212529"><o:p>&nbsp;</o:p></span></pre>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529">Thank you!<o:p></o:p></span></pre>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529"><o:p>&nbsp;</o:p></span></pre>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529">Best regards,<o:p></o:p></span></pre=
>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529">Shuping<o:p></o:p></span></pre>
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From: "Pengshuping (Peng Shuping)" <pengshuping@huawei.com>
To: "BRUNGARD, DEBORAH A" <db3546@att.com>, "teas@ietf.org" <teas@ietf.org>, "spring@ietf.org" <spring@ietf.org>
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Thread-Topic: more on IDs for slices
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Dear Deborah,

Thank you very much for attracting people's attention on APN (Application-a=
ware Networking) and having more discussions on this work to further clarif=
y things. Thank you!

To all, please find more discussions in the APN mailing list (https://datat=
racker.ietf.org/wg/apn/about/). Please you are interest in this topic, plea=
se join us in the discussions. I have also copied the APN mailing list to m=
ake the subscribers of APN aware of these discussions happening here.

To us, the definition of a slice is not in the scope of APN.

APN is focused on developing a framework and set of mechanisms to derive, c=
onvey and use the APN attribute to allow for the implementation of fine-gra=
in user (group)-, application (group)-, and service-level requirements at t=
he network layer.

APN could be used to select TE paths, but it is not just about traffic engi=
neering or traffic steering. It is about selecting next-hop paths in the ne=
twork to route traffic onto links depending on the needs of the traffic. AP=
N can also be used for the fine-granularity performance measurement and vis=
ualization within operator's network domain.

Best regards,
Shuping


From: spring [mailto:spring-bounces@ietf.org] On Behalf Of BRUNGARD, DEBORA=
H A
Sent: Tuesday, February 9, 2021 5:04 AM
To: teas@ietf.org; spring@ietf.org
Subject: [spring] more on IDs for slices

Hi,

Not sure if you are aware, there was a BoF proposed on using an identifier =
to signal user requirements (APN) in a slice, APN BoF. It was decided it wo=
uld be better to first have it further discussed at IETF110's RTGWG as it w=
ould allow for a broader coverage:
https://www.ietf.org/blog/ietf110-bofs/

Considering the current discussion in spring and the work already on-going =
in teas on IDs and "what is a slice", and to help focus the discussion at t=
he meeting, I wanted to bring the following drafts to your attention. I hav=
e asked the authors to help us understand the gaps with the on-going work n=
ot being addressed and what new work is needed. The authors have done a lot=
 of work, this is just a selection:

https://www.ietf.org/archive/id/draft-peng-apn-scope-gap-analysis-00.txt
https://www.ietf.org/archive/id/draft-li-apn-framework-01.txt
https://www.ietf.org/archive/id/draft-li-apn-problem-statement-usecases-01.=
txt

If you search documents on APN, you will find more.

Happy reading,
Deborah


--_000_4278D47A901B3041A737953BAA078ADE198BD1DCDGGEML532MBXchi_
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear Deborah, <o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thank you very much for </span>=
<span lang=3D"EN-GB" style=3D"mso-fareast-language:EN-US">attracting people=
&#8217;s attention on APN (Application-aware Networking) and having more di=
scussions on this work to further clarify things.</span><span lang=3D"EN-GB=
">
</span><span lang=3D"EN-US">Thank you! <o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">To all, please find more discus=
sions in the APN mailing list (<a href=3D"https://datatracker.ietf.org/wg/a=
pn/about/">https://datatracker.ietf.org/wg/apn/about/</a>). Please you are =
interest in this topic, please join us
 in the discussions. I have also copied the APN mailing list to make the su=
bscribers of APN aware of these discussions happening here.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">To us, the definition of a slic=
e is not in the scope of APN.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">APN is focused on developing a =
framework and set of mechanisms to derive, convey and use the APN attribute=
 to allow for the implementation of fine-grain user (group)-, application (=
group)-, and service-level requirements
 at the network layer.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-fareast-language:E=
N-US">APN could be used to select TE paths, but it is not just about traffi=
c engineering or traffic steering. It is about selecting next-hop paths in =
the network to route traffic onto links
 depending on the needs of the traffic. APN </span><span lang=3D"EN-GB">can=
 also be used for the
</span><span lang=3D"EN-US">fine-granularity performance measurement and vi=
sualization within operator&#8217;s network domain.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Best regards, <o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Shuping <o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><span lang=
=3D"EN-US"> spring [mailto:spring-bounces@ietf.org]
<b>On Behalf Of </b>BRUNGARD, DEBORAH A<br>
<b>Sent:</b> Tuesday, February 9, 2021 5:04 AM<br>
<b>To:</b> teas@ietf.org; spring@ietf.org<br>
<b>Subject:</b> [spring] more on IDs for slices<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Hi,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Not sure if you are aware, ther=
e was a BoF proposed on using an identifier to signal user requirements (AP=
N) in a slice, APN BoF. It was decided it would be better to first have it =
further discussed at IETF110&#8217;s RTGWG
 as it would allow for a broader coverage:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><a href=3D"https://www.ietf.org=
/blog/ietf110-bofs/">https://www.ietf.org/blog/ietf110-bofs/</a><o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Considering the current discuss=
ion in spring and the work already on-going in teas on IDs and &#8220;what =
is a slice&#8221;, and to help focus the discussion at the meeting, I wante=
d to bring the following drafts to your attention.
 I have asked the authors to help us understand the gaps with the on-going =
work not being addressed and what new work is needed. The authors have done=
 a lot of work, this is just a selection:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><a href=3D"https://www.ietf.org=
/archive/id/draft-peng-apn-scope-gap-analysis-00.txt">https://www.ietf.org/=
archive/id/draft-peng-apn-scope-gap-analysis-00.txt</a><o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><a href=3D"https://www.ietf.org=
/archive/id/draft-li-apn-framework-01.txt">https://www.ietf.org/archive/id/=
draft-li-apn-framework-01.txt</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><a href=3D"https://www.ietf.org=
/archive/id/draft-li-apn-problem-statement-usecases-01.txt">https://www.iet=
f.org/archive/id/draft-li-apn-problem-statement-usecases-01.txt</a><o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">If you search documents on APN,=
 you will find more.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Happy reading,<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Deborah<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
</div>
</body>
</html>

--_000_4278D47A901B3041A737953BAA078ADE198BD1DCDGGEML532MBXchi_--


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From: <bruno.decraene@orange.com>
To: "spring@ietf.org" <spring@ietf.org>, "draft-ietf-spring-nsh-sr@ietf.org" <draft-ietf-spring-nsh-sr@ietf.org>
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Hi authors, contributors, WG

Authors of draft-ietf-spring-nsh-sr have asked for WG last call.
In preparation of the WGLC on draft-ietf-spring-nsh-sr [1], this email star=
ts a poll for IPR.

If you are aware of IPR that applies to draft-ietf-spring-nsh-sr please res=
pond to this email and keep the mailing list in copy.
If you are aware of IPR, please indicate whether it has been disclosed in a=
ccordance to the IETF IPR rules (detailed are described in RFCs 3979, 4879,=
 3669 and 5378).

If you are an *author or contributor* please respond to this email, on the =
SPRING mailing list, regardless of whether or not you're aware of any IPR.
If you are not an author or contributor, please explicitly respond only if =
you're aware of IPR that has not yet been disclosed.

Thanks,
Regards,
Bruno, Jim, Joel

[1] https://tools.ietf.org/html/draft-ietf-spring-nsh-sr


From: spring [mailto:spring-bounces@ietf.org] On Behalf Of bruno.decraene@o=
range.com
Sent: Monday, November 2, 2020 4:26 PM
To: spring@ietf.org; draft-ietf-spring-nsh-sr@ietf.org
Subject: [spring] draft-ietf-spring-nsh-sr

Hi authors, WG,

Authors of draft-ietf-spring-nsh-sr have asked for WG last call.
Before initiating it, I've done a review of the draft as document shepherd.
Please find below some comments.

---
It's not crystal clear to me what the scope and the goal of the document ar=
e.

-          From the abstract, it's an informative description of two applic=
ations scenarios

-          From section 5, it's a specification of how to integrate NSH and=
 SR.

o   Although it's only really specified for SRv6 and not SR-MPLS.

Please clarify to update the document as needed.

----
IdNits reports for 2 errors. [1]
  ** Downref: Normative reference to an Informational RFC: RFC 7665

-          Probably the only really normative reference is in the security =
section. Do you think that a reference to RFC8300 could be used instead (83=
00 has a large security consideration section)?

-          I noticed that 8300 had the same issue. What was the feedback fr=
om AD at the time?

  ** There are 4 instances of too long lines in the document, the longest o=
ne
     being 82 characters in excess of 72.
Could you please correct in the next version of the draft?

[1] https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/draft-iet=
f-spring-nsh-sr-03.txt
-----
Abstract


The abstract feels like the document is informational (e.g., This document =
describes two application scenarios")
But the document asks for an IANA allocation requiring a STD track document=
, so the draft needs to be std track.
Do you think that you could add that the document defines the encapsulation=
 of NSH for SR-MPLS and SRv6?

----
The introduction section seems to be coming from the SFC WG.

-          May be adding some text about SPRING?

-          Although this is a personal opinion, I find some sentences a bit=
 marketing oriented. Could you please have a look? E.g.

o    "The SFC architecture has the merit to not make assumptions"
What about "The SFC architecture does not make assumptions"? This seems mor=
e neutral.

o    "Among all these approaches, the IETF endorsed a transport-independent

-             SFC encapsulation scheme: NSH [RFC8300<https://tools.ietf.org=
/html/rfc8300>]; which is the most mature SFC encapsulation solution. =BB
I'm not sure how much "is the most mature" is true or not. I'm not sure tha=
t the SPRING WG needs to make such statement nor that it is best placed to =
make such statement.
I'm not sure about "the IETF endorsed a transport-independent  SFC encapsul=
ation scheme". Idem with regards to SPRING WG. I'm not sure that this is a =
typical statement in RFC. If so, it feels like the IETF would have equally =
endorsed transport-depending SFC encapsulation scheme. [RFC8595] https://to=
ols.ietf.org/html/rfc8595

-          "This design is pragmatic"
Looks like an opinion. Plus I'm not sure that the SPRING WG needs to judge =
the work of the SFC WG.
----
=A72

"The two SR flavors, namely SR-MPLS [RFC8660<https://tools.ietf.org/html/rf=
c8660>] and SRv6 [RFC8754<https://tools.ietf.org/html/rfc8754>],"

May be :s/flavors/data plane


"Further considerations such as simplifying classification at intermediate =
SFs"
I'm not sure that simplifying classification is the main point of adding NS=
H. RFC8595 does not refers to this. A priori SR supports a single initial c=
lassification.


----
=A72

"A classifier SHOULD assign an NSH Service Path Identifier (SPI) per

   SR policy so that different traffic flows that use the same NSH

   Service Function Path (SFP) but different SR policy can coexist on

   the same SFP without conflict during SFF processing."



Is the above sentence applicable to both applications scenarios or only for=
 the second one (SR-based SFC with integrated NSH service plane)?

In the current text, it's applicable to both while I'm not sure that it's a=
pplicable to "NSH-based SFC with SR-based transport plane" where the transp=
ort plane (hence the SR policy) is independent of the service plane.

---

=AB hierarchical SFC [RFC8459<https://tools.ietf.org/html/rfc8459>] =BB

Does this document specifically covers hierarchical SFC (hence hierarchical=
 SFC & SR)? Is this reference really pertinent?


---
=A73
Section 3 barely speaks about SR. Is this really a SPRING document?

When SR is refered to, there is nothing specific to SR.

e.g. "After removing the outer transport encapsulation, that may or may not=
 be SR-MPLS or SRv6,"
If the document is related to the integration of SFC and SR, surely the enc=
apsulation is either SR-MPLS or SRv6 (rather than may or may not be SR).

May be indicating that in this scenario, there is a priori one SR-policy pe=
r SF (while in the next scenario, there is a single SR-policy for the whole=
 service chain). That would talk about SR and may provide a key distinction=
 between both.





  " At the end of the SR-MPLS path it is necessary to provide an

   indication to the tail-end that NSH follows the SR-MPLS label stack.

   There are several ways to achieve this but its specification is

   outside the scope of this document."


I agree that this is necessary.
But why is the main  text related to SR-MPLS in this scenario, not specifyi=
ng the behaviour?
I  don't follow the logic of specifying it for SRv6 (and hence requiring th=
is document to be standard track while otherwise it could be an information=
al document describing two scenarios) and not specifying it for SR-MPLS.

Note that this text is duplicated in =A75.1. And 5.1 is nearly defining one=
 proposition, so why not saying that this is a solution? (there is no need =
to define the encoding for the control plane since this part would likely n=
ot be in a spring document) (a

   specific prefix-SID be allocated at each node for use by the SFC

   application for this purpose.)


---
=A74

   The benefits of this scheme include:



[...].



   o  It simplifies the SFF (i.e., the SR router) by nullifying the

      needs for re-classification and SR proxy.

Regarding the need for reclassification, it seems to me that SR alone can n=
ullify

Regarding the need for SR proxy, the behaviour described seems very close t=
o a SR proxy "The SFF strips

   the SR information of the packet, updates the SR information, and

   saves it to a cache indexed by the NSH SPI.  This saved SR

   information is used to encapsulate and forward the packet(s) coming

   back from the SF. =BB






   o  It provides a unique and standard way to pass metadata to SFs.

      Note that currently there is no solution for SR-MPLS to carry

      metadata and there is no solution to pass metadata to SR-unaware

      SFs.

RFC8595 provides another standard way to pass meta data for SR-MPLS.
https://tools.ietf.org/html/rfc8595#section-12

---
=A77.2

"   Encapsulation of NSH following SRv6 may be indicated either by

   encapsulating NSH in UDP (UDP port TBA1) and indicating UDP in the

   Next Header field of the SRH, or by indicating an IP protocol number

   for NSH in the Next Header of the SRH. "


Why is there a need for two solutions?
If so, what are the applicability statement or pro&con of each?
For interop purpose, which one is mandatory and which one is optional?

Thanks,
Regards,
--Bruno

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Orange decline toute responsabilite si ce message a ete altere, deforme ou =
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Thank you.

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Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler
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Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 6"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 7"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 8"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table 3D effects 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table 3D effects 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table 3D effects 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Contemporary"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Elegant"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Professional"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Subtle 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Subtle 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Web 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Web 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Web 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Balloon Text"/>
<w:LsdException Locked=3D"false" Priority=3D"39" Name=3D"Table Grid"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Theme"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Placeholder Te=
xt"/>
<w:LsdException Locked=3D"false" Priority=3D"1" QFormat=3D"true" Name=3D"No=
 Spacing"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
1"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
1"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Revision"/>
<w:LsdException Locked=3D"false" Priority=3D"34" QFormat=3D"true" Name=3D"L=
ist Paragraph"/>
<w:LsdException Locked=3D"false" Priority=3D"29" QFormat=3D"true" Name=3D"Q=
uote"/>
<w:LsdException Locked=3D"false" Priority=3D"30" QFormat=3D"true" Name=3D"I=
ntense Quote"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 1=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
2"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
2"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 2=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
3"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
3"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 3=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
4"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
4"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 4=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
5"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
5"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 5=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
6"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
6"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 6=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"19" QFormat=3D"true" Name=3D"S=
ubtle Emphasis"/>
<w:LsdException Locked=3D"false" Priority=3D"21" QFormat=3D"true" Name=3D"I=
ntense Emphasis"/>
<w:LsdException Locked=3D"false" Priority=3D"31" QFormat=3D"true" Name=3D"S=
ubtle Reference"/>
<w:LsdException Locked=3D"false" Priority=3D"32" QFormat=3D"true" Name=3D"I=
ntense Reference"/>
<w:LsdException Locked=3D"false" Priority=3D"33" QFormat=3D"true" Name=3D"B=
ook Title"/>
<w:LsdException Locked=3D"false" Priority=3D"37" SemiHidden=3D"true" Unhide=
WhenUsed=3D"true" Name=3D"Bibliography"/>
<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
WhenUsed=3D"true" QFormat=3D"true" Name=3D"TOC Heading"/>
<w:LsdException Locked=3D"false" Priority=3D"41" Name=3D"Plain Table 1"/>
<w:LsdException Locked=3D"false" Priority=3D"42" Name=3D"Plain Table 2"/>
<w:LsdException Locked=3D"false" Priority=3D"43" Name=3D"Plain Table 3"/>
<w:LsdException Locked=3D"false" Priority=3D"44" Name=3D"Plain Table 4"/>
<w:LsdException Locked=3D"false" Priority=3D"45" Name=3D"Plain Table 5"/>
<w:LsdException Locked=3D"false" Priority=3D"40" Name=3D"Grid Table Light"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark"=
/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
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<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 6"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 6"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 6"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"List Table 5 Dark"=
/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"List Table 6 Color=
ful"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"List Table 7 Color=
ful"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
 Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"List Table 5 Dark =
Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"List Table 6 Color=
ful Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"List Table 7 Color=
ful Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
 Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"List Table 5 Dark =
Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"List Table 6 Color=
ful Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"List Table 7 Color=
ful Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
 Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4 Accen=
t 3"/>
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<body lang=3D"FR" link=3D"#0563C1" vlink=3D"#954F72" style=3D"tab-interval:=
35.4pt">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">Hi authors, contributors, WG<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Authors of draft-<span class=3D"SpellE">ietf</span>-spring=
-<span class=3D"SpellE">nsh</span>-<span class=3D"SpellE">sr</span> have as=
ked for WG last call.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">In preparation of the WGLC on draft-<span class=3D"SpellE">ietf</sp=
an>-spring-<span class=3D"SpellE">nsh</span>-<span class=3D"SpellE">sr</spa=
n>
 [1], this email starts a poll for IPR.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">If you are aware of IPR that applies to
 draft-<span class=3D"SpellE">ietf</span>-spring-<span class=3D"SpellE">nsh=
</span>-<span class=3D"SpellE">sr</span> please respond to this email and k=
eep the mailing list in copy.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">If you are aware of IPR, please indicate
 whether it has been disclosed in accordance to the IETF IPR rules (detaile=
d are described in RFCs 3979, 4879, 3669 and 5378).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">If you are an *author or contributor* please
 respond to this email, on the SPRING mailing list, regardless of whether o=
r not you're aware of any IPR.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">If you are not an author or contributor,
 please explicitly respond only if you're aware of IPR that has not yet bee=
n disclosed.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">Bruno, Jim, Joel<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">[1] https://tools.ietf.org/html/draft-ietf-spring-nsh-sr<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><span class=3D"SpellE"><b><span style=3D"mso-fareast=
-font-family:&quot;Times New Roman&quot;;mso-bidi-font-family:Calibri;mso-f=
areast-language:FR">From</span></b></span><b><span style=3D"mso-fareast-fon=
t-family:&quot;Times New Roman&quot;;mso-bidi-font-family:Calibri;mso-farea=
st-language:FR">:</span></b><span style=3D"mso-fareast-font-family:&quot;Ti=
mes New Roman&quot;;mso-bidi-font-family:Calibri;mso-fareast-language:FR">
<span class=3D"SpellE">spring</span> [mailto:spring-bounces@ietf.org] <b>On=
 Behalf Of
</b>bruno.decraene@orange.com<br>
<b>Sent:</b> Monday, November 2, 2020 4:26 PM<br>
<b>To:</b> spring@ietf.org; draft-ietf-spring-nsh-sr@ietf.org<br>
<b>Subject:</b> [spring] draft-ietf-spring-nsh-sr<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Hi authors, WG,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Authors of draft-ietf-spring-nsh-sr have asked for WG last=
 call.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Before initiating it, I&#8217;ve done a review of the draf=
t as document shepherd.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Please find below some comments.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">---<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">It&#8217;s not crystal clear to me what the scope and the =
goal of the document are.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D;m=
so-ansi-language:EN-GB"><span style=3D"mso-list:Ignore">-<span style=3D"fon=
t:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D;=
mso-ansi-language:EN-GB">From the abstract, it&#8217;s an informative descr=
iption of two applications scenarios<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D;m=
so-ansi-language:EN-GB"><span style=3D"mso-list:Ignore">-<span style=3D"fon=
t:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D;=
mso-ansi-language:EN-GB">From section 5, it&#8217;s a specification of how =
to integrate NSH and SR.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l1 level2 lfo2">
<![if !supportLists]><span lang=3D"EN-GB" style=3D"font-family:&quot;Courie=
r New&quot;;mso-fareast-font-family:&quot;Courier New&quot;;color:#1F497D;m=
so-ansi-language:EN-GB"><span style=3D"mso-list:Ignore">o<span style=3D"fon=
t:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D;=
mso-ansi-language:EN-GB">Although it&#8217;s only really specified for SRv6=
 and not SR-MPLS.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Please clarify to update the document as needed.<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">IdNits reports for 2 errors. [1]
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-GB;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;</span>** Downref: Normative reference to an Informational RFC:
 RFC 7665<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D;m=
so-ansi-language:EN-GB;mso-fareast-language:EN-US"><span style=3D"mso-list:=
Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"mso-bidi-font-=
family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language:EN-GB;ms=
o-fareast-language:EN-US">Probably the only really normative reference is i=
n the security section. Do you think that a reference
 to RFC8300 could be used instead (8300 has a large security consideration =
section)?<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D;m=
so-ansi-language:EN-GB;mso-fareast-language:EN-US"><span style=3D"mso-list:=
Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"mso-bidi-font-=
family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language:EN-GB;ms=
o-fareast-language:EN-US">I noticed that 8300 had the same issue. What was =
the feedback from AD at the time?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-GB;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;
</span>** There are 4 instances of too long lines in the document, the long=
est one<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-GB;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;&nbsp;&nbsp;
</span>being 82 characters in excess of 72.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:35.4pt"><span lang=3D"EN-GB" st=
yle=3D"color:#1F497D;mso-ansi-language:EN-GB">Could you please correct in t=
he next version of the draft?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">[1]
<a href=3D"https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/dr=
aft-ietf-spring-nsh-sr-03.txt">
https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/draft-ietf-sp=
ring-nsh-sr-03.txt</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">-----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Abstract<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"font-size:11.0pt;font-family:&quot;Calib=
ri&quot;,sans-serif;mso-fareast-font-family:Calibri;mso-bidi-font-family:&q=
uot;Times New Roman&quot;;color:#1F497D;mso-ansi-language:EN-GB;mso-fareast=
-language:EN-US">The abstract feels like the document is informational (e.g=
.,</span><span lang=3D"EN-GB" style=3D"font-family:&quot;Calibri&quot;,sans=
-serif;mso-bidi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-a=
nsi-language:EN-GB;mso-fareast-language:EN-US"> </span><span lang=3D"EN-GB"=
 style=3D"mso-ansi-language:EN-GB">This document describes two application =
scenarios&#8221;)<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">But the document asks for an IANA allocation requiring a S=
TD track document, so the draft needs to be std track.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Do you think that you could add that the document defines =
the encapsulation of NSH for SR-MPLS and SRv6?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">The introduction section seems to be coming from the SFC W=
G.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D;m=
so-ansi-language:EN-GB"><span style=3D"mso-list:Ignore">-<span style=3D"fon=
t:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D;=
mso-ansi-language:EN-GB">May be adding some text about SPRING?<o:p></o:p></=
span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"mso-ansi-langua=
ge:EN-GB"><span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &quot;=
Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D;=
mso-ansi-language:EN-GB">Although this is a personal opinion, I find some s=
entences a bit marketing oriented. Could you please have a look? E.g.
</span><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p></o:p></=
span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo4">
<![if !supportLists]><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-fa=
mily:&quot;Courier New&quot;;mso-fareast-font-family:&quot;Courier New&quot=
;;mso-ansi-language:EN-GB"><span style=3D"mso-list:Ignore">o<span style=3D"=
font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D;=
mso-ansi-language:EN-GB">&#8220;</span><span lang=3D"EN-GB" style=3D"mso-an=
si-language:EN-GB">The SFC architecture has the merit to not make
</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Cou=
rier New&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi=
-language:EN-GB">assumptions</span><span lang=3D"EN-GB" style=3D"mso-ansi-l=
anguage:EN-GB">&#8221;<br>
<span style=3D"color:#1F497D">What about &#8220;The SFC architecture does n=
ot make assumptions&#8221;? This seems more neutral.</span>
</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Cou=
rier New&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo4">
<![if !supportLists]><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-fa=
mily:&quot;Courier New&quot;;mso-fareast-font-family:&quot;Courier New&quot=
;;mso-ansi-language:EN-GB"><span style=3D"mso-list:Ignore">o<span style=3D"=
font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"mso-ansi-langu=
age:EN-GB">&#8220;</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;fon=
t-family:&quot;Courier New&quot;;mso-fareast-font-family:&quot;Times New Ro=
man&quot;;mso-ansi-language:EN-GB">Among all these approaches, the
 IETF endorsed a transport-independent<o:p></o:p></span></p>
<pre style=3D"margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo=
4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"font-family:&quot;Cal=
ibri&quot;,sans-serif;mso-fareast-font-family:Calibri;mso-ansi-language:EN-=
GB"><span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &quot;Times =
New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </s=
pan></span></span><![endif]><span lang=3D"EN-GB" style=3D"mso-ansi-language=
:EN-GB"><span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;</span>SFC encap=
sulation scheme: NSH [</span><a href=3D"https://tools.ietf.org/html/rfc8300=
" title=3D"&quot;Network Service Header (NSH)&quot;"><span lang=3D"EN-GB" s=
tyle=3D"mso-fareast-font-family:Calibri;mso-ansi-language:EN-GB">RFC8300</s=
pan></a><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB">]; which is =
the most mature SFC encapsulation solution.&nbsp;=BB<br><span style=3D"colo=
r:#1F497D">I&#8217;m not sure how much &#8220;is the most mature&#8221; is =
true or not. I&#8217;m not sure that the SPRING WG needs to make such state=
ment nor that it is best placed to make such statement.<br>I&#8217;m not su=
re about &#8220;</span>the IETF endorsed a transport-independent<span style=
=3D"mso-spacerun:yes">&nbsp; </span>SFC encapsulation scheme&#8221;. <span =
style=3D"color:#1F497D">Idem with regards to SPRING WG. I&#8217;m not sure =
that this is a typical statement in RFC. If so, it feels like the IETF woul=
d have equally endorsed transport-depending SFC encapsulation scheme. [RFC8=
595] <a href=3D"https://tools.ietf.org/html/rfc8595">https://tools.ietf.org=
/html/rfc8595</a></span><o:p></o:p></span></pre>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"font-size:10.0p=
t;mso-ansi-language:EN-GB"><span style=3D"mso-list:Ignore">-<span style=3D"=
font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"font-size:10.0=
pt;font-family:&quot;Courier New&quot;;mso-fareast-font-family:&quot;Times =
New Roman&quot;;mso-ansi-language:EN-GB">&#8220;This design is pragmatic&#8=
221;<br>
</span><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB"=
>Looks like an opinion. Plus I&#8217;m not sure that the SPRING WG needs to=
 judge the work of the SFC WG.</span><span lang=3D"EN-GB" style=3D"font-siz=
e:10.0pt;font-family:&quot;Courier New&quot;;mso-fareast-font-family:&quot;=
Times New Roman&quot;;mso-ansi-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-font-family:&quot;Times New Roma=
n&quot;;mso-ansi-language:EN-GB">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-font-family:&quot;Times New Roma=
n&quot;;mso-ansi-language:EN-GB">=A72<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB">&#8220;The two =
SR flavors, namely SR-MPLS [</span><a href=3D"https://tools.ietf.org/html/r=
fc8660" title=3D"&quot;Segment Routing with the MPLS Data Plane&quot;"><spa=
n lang=3D"EN-GB" style=3D"mso-fareast-font-family:Calibri;mso-ansi-language=
:EN-GB">RFC8660</span></a><span lang=3D"EN-GB" style=3D"mso-ansi-language:E=
N-GB">] and SRv6 [</span><a href=3D"https://tools.ietf.org/html/rfc8754" ti=
tle=3D"&quot;IPv6 Segment Routing Header (SRH)&quot;"><span lang=3D"EN-GB" =
style=3D"mso-fareast-font-family:Calibri;mso-ansi-language:EN-GB">RFC8754</=
span></a><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB">],&#8221;<o=
:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">M=
ay be :s/flavors/data plane</span><span lang=3D"EN-GB" style=3D"mso-ansi-la=
nguage:EN-GB"><o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-font-family:&quot;Times New Roma=
n&quot;;mso-ansi-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB">&#8220;Further =
considerations such as simplifying classification at intermediate SFs&#8221=
;<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">I&#8217;m not sure that simplifying classification is the =
main point of adding NSH. RFC8595 does not refers to this. A priori SR supp=
orts a single initial classification.</span><span lang=3D"EN-GB" style=3D"f=
ont-size:10.0pt;font-family:&quot;Courier New&quot;;mso-fareast-font-family=
:&quot;Times New Roman&quot;;mso-ansi-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt"><span lang=3D"EN=
-GB" style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;mso-fare=
ast-font-family:&quot;Times New Roman&quot;;mso-ansi-language:EN-GB"><o:p>&=
nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">=A72<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB">&#8220;A classi=
fier SHOULD assign an NSH Service Path Identifier (SPI) per<o:p></o:p></spa=
n></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>SR policy so that different traffic f=
lows that use the same NSH<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>Service Function Path (SFP) but diffe=
rent SR policy can coexist on<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>the same SFP without conflict during =
SFF processing.&#8221;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">I=
s the above sentence applicable to both applications scenarios or only for =
the second one (</span><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">SR-based SFC with integrated NSH service plane)?<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">I=
n the current text, it&#8217;s applicable to both while I&#8217;m not sure =
that it&#8217;s applicable to &#8220;</span><span lang=3D"EN-GB" style=3D"m=
so-ansi-language:EN-GB">NSH-based SFC with SR-based transport plane&#8221;<=
span style=3D"color:#1F497D"> where the transport plane (hence the SR polic=
y) is independent of the service plane.<o:p></o:p></span></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">-=
--<o:p></o:p></span></pre>
<pre>=AB&nbsp;hierarchical SFC [<a href=3D"https://tools.ietf.org/html/rfc8=
459" title=3D"&quot;Hierarchical Service Function Chaining (hSFC)&quot;"><s=
pan style=3D"mso-fareast-font-family:Calibri">RFC8459</span></a>]&nbsp;=BB =
<o:p></o:p></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">D=
oes this document specifically covers hierarchical SFC (hence hierarchical =
SFC &amp; SR)? Is this reference really pertinent?</span><span lang=3D"EN-G=
B" style=3D"mso-ansi-language:EN-GB"><o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">---<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">=A73<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Section 3 barely speaks about SR. Is this really a SPRING =
document?<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">W=
hen SR is refered to, there is nothing specific to SR.<o:p></o:p></span></p=
re>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">e=
.g. &#8220;</span><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB">Af=
ter removing the outer transport encapsulation, that may or may not be SR-M=
PLS or SRv6,&#8221;<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">If the document is related to the integration of SFC and S=
R, surely the encapsulation is either SR-MPLS or SRv6 (rather than may or m=
ay not be SR).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">May be indicating that in this scenario, there is a priori=
 one SR-policy per SF (while in the next scenario, there is a single SR-pol=
icy for the whole service chain). That
 would talk about SR and may provide a key distinction between both.<o:p></=
o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp; </span>&#8220; At the end of the SR-MPLS path it i=
s necessary to provide an<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>indication to the tail-end that NSH f=
ollows the SR-MPLS label stack.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>There are several ways to achieve thi=
s but its specification is<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>outside the scope of this document.&#=
8221;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">I agree that this is necessary.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">But why is the main<span style=3D"mso-spacerun:yes">&nbsp;
</span>text related to SR-MPLS in this scenario, not specifying the behavio=
ur?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">I<span style=3D"mso-spacerun:yes">&nbsp;
</span>don&#8217;t follow the logic of specifying it for SRv6 (and hence re=
quiring this document to be standard track while otherwise it could be an i=
nformational document describing two scenarios) and not specifying it for S=
R-MPLS.<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">N=
ote that this text is duplicated in =A75.1. And 5.1 is nearly defining one =
proposition, so why not saying that this is a solution? (there is no need t=
o define the encoding for the control plane since this part would likely no=
t be in a spring document) (</span><span lang=3D"EN-GB" style=3D"mso-ansi-l=
anguage:EN-GB">a<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>specific prefix-SID be allocated at e=
ach node for use by the SFC<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span></span>application for this purpose.)=
<o:p></o:p></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">---<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">=A74<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>The benefits of this scheme include:<=
o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB">[&#8230;].<o:p>=
</o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>o<span style=3D"mso-spacerun:yes">&nb=
sp; </span>It simplifies the SFF (i.e., the SR router) by nullifying the<o:=
p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>needs for re-classi=
fication and SR proxy.<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Regarding the need for reclassification, it seems to me th=
at SR alone can nullify<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">R=
egarding the need for SR proxy, the behaviour described seems very close to=
 a SR proxy &#8220;</span><span lang=3D"EN-GB" style=3D"mso-ansi-language:E=
N-GB">The SFF strips<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>the SR information of the packet, upd=
ates the SR information, and<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>saves it to a cache indexed by the NS=
H SPI.<span style=3D"mso-spacerun:yes">&nbsp; </span>This saved SR<o:p></o:=
p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>information is used to encapsulate an=
d forward the packet(s) coming<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span></span>back from the SF.&nbsp;=BB<o:p=
></o:p></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>o<span style=3D"mso-spacerun:yes">&nb=
sp; </span>It provides a unique and standard way to pass metadata to SFs.<o=
:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>Note that currently=
 there is no solution for SR-MPLS to carry<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>metadata and there =
is no solution to pass metadata to SR-unaware<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>SFs.<o:p></o:p></sp=
an></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">RFC8595 provides another standard way to pass meta data fo=
r SR-MPLS.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><a href=3D"https://tools.ietf.org/html/rfc8595#section-12"=
>https://tools.ietf.org/html/rfc8595#section-12</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">---<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">=A77.2<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB">&#8220;<span st=
yle=3D"mso-spacerun:yes">&nbsp;&nbsp; </span>Encapsulation of NSH following=
 SRv6 may be indicated either by<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>encapsulating NSH in UDP (UDP port TB=
A1) and indicating UDP in the<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>Next Header field of the SRH, or by i=
ndicating an IP protocol number<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>for NSH in the Next Header of the SRH=
. &#8220;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Why is there a need for two solutions?
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">If so, what are the applicability statement or pro&amp;con=
 of each?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">For interop purpose, which one is mandatory and which one =
is optional?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">--Bruno</span><span lang=3D"EN-GB" style=3D"mso-ansi-langu=
age:EN-GB"><o:p></o:p></span></p>
<pre>______________________________________________________________________=
___________________________________________________<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>Ce message et ses pieces jointes peuvent contenir des informations con=
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<pre>pas etre diffuses, exploites ou copies sans autorisation. Si vous avez=
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<pre>a l'expediteur et le detruire ainsi que les pieces jointes. Les messag=
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<pre>Orange decline toute responsabilite si ce message a ete altere, deform=
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<pre>This message and its attachments may contain confidential or privilege=
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</div>
</div>
<PRE>______________________________________________________________________=
___________________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler
a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;
they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and dele=
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Date: Tue, 9 Feb 2021 18:31:11 +0000
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Subject: [spring] WG Last Call draft-ietf-spring-nsh-sr
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Dear WG,

This message starts a 2 weeks WG last call for draft-ietf-spring-nsh-sr [1].
After review of the document please indicate whether you believe this docum=
ent should be progressed to the IESG.

In addition to yes/no, please consider providing a technical review of this=
 document; in particular if you care for this document.
Indeed, since WG adoption, this document had benefited from little reviews =
from the WG, so we need more review from the SPRING WG.

If you are aware of an implementation of this document, please report the i=
mplementation either on the list or to the chairs so that the shepherd can =
report implementations in the writeup.

Note that I'll forward that call to the SFC WG.

Thanks!

[1] https://tools.ietf.org/html/draft-ietf-spring-nsh-sr

--Bruno


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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 4"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 5"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 6"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 7"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Grid 8"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 4"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 5"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 6"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 7"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 8"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table 3D effects 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table 3D effects 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table 3D effects 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Contemporary"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Elegant"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Professional"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Subtle 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Subtle 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Web 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Web 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Web 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Balloon Text"/>
<w:LsdException Locked=3D"false" Priority=3D"39" Name=3D"Table Grid"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Theme"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Placeholder Te=
xt"/>
<w:LsdException Locked=3D"false" Priority=3D"1" QFormat=3D"true" Name=3D"No=
 Spacing"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
1"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
1"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Revision"/>
<w:LsdException Locked=3D"false" Priority=3D"34" QFormat=3D"true" Name=3D"L=
ist Paragraph"/>
<w:LsdException Locked=3D"false" Priority=3D"29" QFormat=3D"true" Name=3D"Q=
uote"/>
<w:LsdException Locked=3D"false" Priority=3D"30" QFormat=3D"true" Name=3D"I=
ntense Quote"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 1=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
2"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
2"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 2=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
3"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
3"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 3=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
4"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
4"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 4=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
5"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
5"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 5=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
6"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
6"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 6=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"19" QFormat=3D"true" Name=3D"S=
ubtle Emphasis"/>
<w:LsdException Locked=3D"false" Priority=3D"21" QFormat=3D"true" Name=3D"I=
ntense Emphasis"/>
<w:LsdException Locked=3D"false" Priority=3D"31" QFormat=3D"true" Name=3D"S=
ubtle Reference"/>
<w:LsdException Locked=3D"false" Priority=3D"32" QFormat=3D"true" Name=3D"I=
ntense Reference"/>
<w:LsdException Locked=3D"false" Priority=3D"33" QFormat=3D"true" Name=3D"B=
ook Title"/>
<w:LsdException Locked=3D"false" Priority=3D"37" SemiHidden=3D"true" Unhide=
WhenUsed=3D"true" Name=3D"Bibliography"/>
<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
WhenUsed=3D"true" QFormat=3D"true" Name=3D"TOC Heading"/>
<w:LsdException Locked=3D"false" Priority=3D"41" Name=3D"Plain Table 1"/>
<w:LsdException Locked=3D"false" Priority=3D"42" Name=3D"Plain Table 2"/>
<w:LsdException Locked=3D"false" Priority=3D"43" Name=3D"Plain Table 3"/>
<w:LsdException Locked=3D"false" Priority=3D"44" Name=3D"Plain Table 4"/>
<w:LsdException Locked=3D"false" Priority=3D"45" Name=3D"Plain Table 5"/>
<w:LsdException Locked=3D"false" Priority=3D"40" Name=3D"Grid Table Light"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark"=
/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 6"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 6"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 6"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"List Table 5 Dark"=
/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"List Table 6 Color=
ful"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"List Table 7 Color=
ful"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
 Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"List Table 5 Dark =
Accent 1"/>
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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">Dear WG, <o:p>
</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">This message starts a 2 weeks WG last call for draft-<span class=3D"Spel=
lE">ietf</span>-spring-<span class=3D"SpellE">nsh</span>-<span class=3D"Spe=
llE">sr</span> [1].<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">After review of the document please indicate whether you believe this do=
cument should be progressed to the IESG.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">In addition to yes/no, please consider providing a technical review of t=
his document; in particular if you care for this document.<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">Indeed, since WG adoption, this document had benefited from little revie=
ws from the WG, so we need more review from the SPRING WG.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">If you are aware of an implementation of this document, please report th=
e implementation either on the list or to the chairs so that the shepherd c=
an report implementations in the
<span class=3D"SpellE">writeup</span>.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">Note that I&#8217;ll forward that call to the SFC WG.<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span class=3D"SpellE">Thanks</span>!<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">[1] <a href=3D"https://tools.ietf.org/html/draft-iet=
f-spring-nsh-sr">
https://tools.ietf.org/html/draft-ietf-spring-nsh-sr</a><o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">--Bruno<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
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From nobody Tue Feb  9 10:40:37 2021
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To: bruno.decraene@orange.com, "spring@ietf.org" <spring@ietf.org>
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From: "Joel M. Halpern" <jmh@joelhalpern.com>
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Subject: Re: [spring] IPR call for draft-ietf-spring-nsh-sr
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As a contributor, I do not know of any undisclosed IPR on this draft.

Yours,'
Joel

On 2/9/2021 1:06 PM, bruno.decraene@orange.com wrote:
> Hi authors, contributors, WG
> 
> Authors of draft-ietf-spring-nsh-sr have asked for WG last call.
> 
> In preparation of the WGLC on draft-ietf-spring-nsh-sr [1], this email 
> starts a poll for IPR.
> 
> If you are aware of IPR that applies to draft-ietf-spring-nsh-sr please 
> respond to this email and keep the mailing list in copy.
> 
> If you are aware of IPR, please indicate whether it has been disclosed 
> in accordance to the IETF IPR rules (detailed are described in RFCs 
> 3979, 4879, 3669 and 5378).
> 
> If you are an *author or contributor* please respond to this email, on 
> the SPRING mailing list, regardless of whether or not you're aware of 
> any IPR.
> 
> If you are not an author or contributor, please explicitly respond only 
> if you're aware of IPR that has not yet been disclosed.
> 
> Thanks,
> 
> Regards,
> 
> Bruno, Jim, Joel
> 
> [1] https://tools.ietf.org/html/draft-ietf-spring-nsh-sr
> 
> *From**:*spring [mailto:spring-bounces@ietf.org] *On Behalf Of 
> *bruno.decraene@orange.com
> *Sent:* Monday, November 2, 2020 4:26 PM
> *To:* spring@ietf.org; draft-ietf-spring-nsh-sr@ietf.org
> *Subject:* [spring] draft-ietf-spring-nsh-sr
> 
> Hi authors, WG,
> 
> Authors of draft-ietf-spring-nsh-sr have asked for WG last call.
> 
> Before initiating it, I’ve done a review of the draft as document shepherd.
> 
> Please find below some comments.
> 
> ---
> 
> It’s not crystal clear to me what the scope and the goal of the document 
> are.
> 
> -From the abstract, it’s an informative description of two applications 
> scenarios
> 
> -From section 5, it’s a specification of how to integrate NSH and SR.
> 
> oAlthough it’s only really specified for SRv6 and not SR-MPLS.
> 
> Please clarify to update the document as needed.
> 
> ----
> 
> IdNits reports for 2 errors. [1]
> 
> ** Downref: Normative reference to an Informational RFC: RFC 7665
> 
> -Probably the only really normative reference is in the security 
> section. Do you think that a reference to RFC8300 could be used instead 
> (8300 has a large security consideration section)?
> 
> -I noticed that 8300 had the same issue. What was the feedback from AD 
> at the time?
> 
> ** There are 4 instances of too long lines in the document, the longest one
> 
> being 82 characters in excess of 72.
> 
> Could you please correct in the next version of the draft?
> 
> [1] 
> https://tools.ietf.org/idnits?url=https://tools.ietf.org/id/draft-ietf-spring-nsh-sr-03.txt 
> <https://tools.ietf.org/idnits?url=https://tools.ietf.org/id/draft-ietf-spring-nsh-sr-03.txt>
> 
> -----
> 
> Abstract
> 
> The abstract feels like the document is informational (e.g.,This 
> document describes two application scenarios”)
> 
> But the document asks for an IANA allocation requiring a STD track 
> document, so the draft needs to be std track.
> 
> Do you think that you could add that the document defines the 
> encapsulation of NSH for SR-MPLS and SRv6?
> 
> ----
> 
> The introduction section seems to be coming from the SFC WG.
> 
> -May be adding some text about SPRING?
> 
> -Although this is a personal opinion, I find some sentences a bit 
> marketing oriented. Could you please have a look? E.g.
> 
> o“The SFC architecture has the merit to not make assumptions”
> What about “The SFC architecture does not make assumptions”? This seems 
> more neutral.
> 
> o“Among all these approaches, the IETF endorsed a transport-independent
> 
> -SFC encapsulation scheme: NSH [RFC8300  <https://tools.ietf.org/html/rfc8300>]; which is the most mature SFC encapsulation solution. »
> I’m not sure how much “is the most mature” is true or not. I’m not sure 
> that the SPRING WG needs to make such statement nor that it is best 
> placed to make such statement.
> I’m not sure about “the IETF endorsed a transport-independentSFC 
> encapsulation scheme”. Idem with regards to SPRING WG. I’m not sure that 
> this is a typical statement in RFC. If so, it feels like the IETF would 
> have equally endorsed transport-depending SFC encapsulation scheme. 
> [RFC8595] https://tools.ietf.org/html/rfc8595 
> <https://tools.ietf.org/html/rfc8595>
> 
> -“This design is pragmatic”
> Looks like an opinion. Plus I’m not sure that the SPRING WG needs to 
> judge the work of the SFC WG.
> 
> ----
> 
> §2
> 
> “The two SR flavors, namely SR-MPLS [RFC8660  <https://tools.ietf.org/html/rfc8660>] and SRv6 [RFC8754  <https://tools.ietf.org/html/rfc8754>],”
> 
> May be :s/flavors/data plane
> 
> “Further considerations such as simplifying classification at 
> intermediate SFs”
> 
> I’m not sure that simplifying classification is the main point of adding 
> NSH. RFC8595 does not refers to this. A priori SR supports a single 
> initial classification.
> 
> ----
> 
> §2
> 
> “A classifier SHOULD assign an NSH Service Path Identifier (SPI) per
> 
> SR policy so that different traffic flows that use the same NSH
> 
> Service Function Path (SFP) but different SR policy can coexist on
> 
> the same SFP without conflict during SFF processing.”
> 
> Is the above sentence applicable to both applications scenarios or only 
> for the second one (SR-based SFC with integrated NSH service plane)?
> 
> In the current text, it’s applicable to both while I’m not sure that 
> it’s applicable to “NSH-based SFC with SR-based transport plane”where 
> the transport plane (hence the SR policy) is independent of the service 
> plane.
> 
> ---
> 
> « hierarchical SFC [RFC8459  <https://tools.ietf.org/html/rfc8459>] »
> 
> Does this document specifically covers hierarchical SFC (hence 
> hierarchical SFC & SR)? Is this reference really pertinent?
> 
> ---
> 
> §3
> 
> Section 3 barely speaks about SR. Is this really a SPRING document?
> 
> When SR is refered to, there is nothing specific to SR.
> 
> e.g. “After removing the outer transport encapsulation, that may or may 
> not be SR-MPLS or SRv6,”
> 
> If the document is related to the integration of SFC and SR, surely the 
> encapsulation is either SR-MPLS or SRv6 (rather than may or may not be SR).
> 
> May be indicating that in this scenario, there is a priori one SR-policy 
> per SF (while in the next scenario, there is a single SR-policy for the 
> whole service chain). That would talk about SR and may provide a key 
> distinction between both.
> 
> “ At the end of the SR-MPLS path it is necessary to provide an
> 
> indication to the tail-end that NSH follows the SR-MPLS label stack.
> 
> There are several ways to achieve this but its specification is
> 
> outside the scope of this document.”
> 
> I agree that this is necessary.
> 
> But why is the maintext related to SR-MPLS in this scenario, not 
> specifying the behaviour?
> 
> Idon’t follow the logic of specifying it for SRv6 (and hence requiring 
> this document to be standard track while otherwise it could be an 
> informational document describing two scenarios) and not specifying it 
> for SR-MPLS.
> 
> Note that this text is duplicated in §5.1. And 5.1 is nearly defining 
> one proposition, so why not saying that this is a solution? (there is no 
> need to define the encoding for the control plane since this part would 
> likely not be in a spring document) (a
> 
> specific prefix-SID be allocated at each node for use by the SFC
> 
> application for this purpose.)
> 
> ---
> 
> §4
> 
> The benefits of this scheme include:
> 
> […].
> 
> oIt simplifies the SFF (i.e., the SR router) by nullifying the
> 
> needs for re-classification and SR proxy.
> 
> Regarding the need for reclassification, it seems to me that SR alone 
> can nullify
> 
> Regarding the need for SR proxy, the behaviour described seems very 
> close to a SR proxy “The SFF strips
> 
> the SR information of the packet, updates the SR information, and
> 
> saves it to a cache indexed by the NSH SPI.This saved SR
> 
> information is used to encapsulate and forward the packet(s) coming
> 
> back from the SF. »
> 
> oIt provides a unique and standard way to pass metadata to SFs.
> 
> Note that currently there is no solution for SR-MPLS to carry
> 
> metadata and there is no solution to pass metadata to SR-unaware
> 
> SFs.
> 
> RFC8595 provides another standard way to pass meta data for SR-MPLS.
> 
> https://tools.ietf.org/html/rfc8595#section-12 
> <https://tools.ietf.org/html/rfc8595#section-12>
> 
> ---
> 
> §7.2
> 
> “Encapsulation of NSH following SRv6 may be indicated either by
> 
> encapsulating NSH in UDP (UDP port TBA1) and indicating UDP in the
> 
> Next Header field of the SRH, or by indicating an IP protocol number
> 
> for NSH in the Next Header of the SRH. “
> 
> Why is there a need for two solutions?
> 
> If so, what are the applicability statement or pro&con of each?
> 
> For interop purpose, which one is mandatory and which one is optional?
> 
> Thanks,
> 
> Regards,
> 
> --Bruno
> 
> _________________________________________________________________________________________________________________________
> 
> Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc
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> 
> Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci.
> 
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> 
> they should not be distributed, used or copied without authorisation.
> 
> If you have received this email in error, please notify the sender and delete this message and its attachments.
> 
> As emails may be altered, Orange is not liable for messages that have been modified, changed or falsified.
> 
> Thank you.
> 
> _________________________________________________________________________________________________________________________
> 
> Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc
> pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler
> a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration,
> Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci.
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> https://www.ietf.org/mailman/listinfo/spring
> 


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From: <bruno.decraene@orange.com>
To: "spring@ietf.org" <spring@ietf.org>
CC: "draft-ietf-spring-nsh-sr@ietf.org" <draft-ietf-spring-nsh-sr@ietf.org>
Thread-Topic: WG Last Call draft-ietf-spring-nsh-sr
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Hi authors, WG,

Speaking as the shepherd.

Thanks for the -04 which answer my previous set of comments.

I've reviewed the document again, focusing on the new text. Please find bel=
ow some additional comments.

=3D=3D=3D
SR-MPLS  =A76.1

" At the end of the SR-MPLS path it is necessary to provide an
   indication to the tail-end that NSH follows the SR-MPLS label stack
   as described by [RFC8596]."

My understanding is that RFC8596 performs the above goal by adding an SFF l=
abel at the bottom of the stack. In which case it would not be mandatory to=
 disable Penultimate Hop Popping on the prefix SID as draft-ietf-spring-nsh=
-sr-04 is mandating.

I"m seeing two options that you could either choose from or describe both:
- a prefix SID dedicated to NSH. In which case PHP needs to be disabled and=
 there is no need for the SFF label specified in RFC8596 (alternatively, th=
is prefix SID is _the_ SFF label defined in RFC8596, although 8596 refers t=
o a local label(segment) while usually a prefix SID is a global segment)
- use a multi-purpose prefix SID. In which case, indeed " At the end of the=
 SR-MPLS path it is necessary to provide an  indication to the tail-end tha=
t NSH follows the SR-MPLS label stack  as described by [RFC8596].


Also
"   At the end of the SR-MPLS path it is necessary to provide an
   indication to the tail-end that NSH follows the SR-MPLS label stack
   as described by [RFC8596]."

In the scheme "SR-based SFC", "the end of the SR-MPLS" is only the last SF =
(not all other SF on the SF chain).
So how does others SFC have an indication that the NSH follows the SR-MPLS =
label stack?
Alternatively something along :s/ end of the SR-MPLS path/for all the SF al=
ong the SR-MPLS path

=3D=3D=3D
This document defines two schemes: NSH-based SFC and SR-based SFC.

=A75 is called "Packet Processing Details" but seems to only cover SRv6 and=
  the "SR-based SFC" scheme.
If so,
- it would be good if the title/section hierarchy could reflect this.
- what about the behavior for SR-MPLS with the "SR-based SFC" scheme (a pri=
ori with SR-MPLS you equally need a cache in order to re-push the SR-MPLS h=
eader)
=3D=3D=3D=3D
=A74
For "SR-based SFC", my understanding is that the Service Chain (ordered lis=
t of SF) is specified in the list of segments.
Please forgive my lack of NSH knowledge, but it seems to me that the NSH SP=
I look up may return multiple next-hop within a service path for a given SF=
 (e.g. for load balancing). (cf table 4 of RFC 8600).
Here, if the NSH SPI change the SFC next-hop, the SR header on the packet w=
ill be completely wrong (well most probably the list of segment will overri=
de the choice from the NSH SPI look up). Is this a correct understanding? I=
f so is this a bug or a feature? Either way, may be some text would need to=
 be added. e.g. to warn that such SFC feature is not available anymore.

=3D=3D=3D=3D=3D
Nits:
- I'm not a fan of the use of the term "details" which to me are "specifica=
tions". (e.g. "5. Packet Processing Details", "6. Encapsulation Details", "=
encapsulation details")

- ID Nits still reports one error (**) on the new text (in the abstract).
https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/draft-ietf-sp=
ring-nsh-sr-04.txt

Thanks,
Regards,
--Bruno

From: spring [mailto:spring-bounces@ietf.org] On Behalf Of bruno.decraene@o=
range.com
Sent: Tuesday, February 9, 2021 7:31 PM
To: spring@ietf.org
Cc: draft-ietf-spring-nsh-sr@ietf.org
Subject: [spring] WG Last Call draft-ietf-spring-nsh-sr

Dear WG,

This message starts a 2 weeks WG last call for draft-ietf-spring-nsh-sr [1].

After review of the document please indicate whether you believe this docum=
ent should be progressed to the IESG.

In addition to yes/no, please consider providing a technical review of this=
 document; in particular if you care for this document.
Indeed, since WG adoption, this document had benefited from little reviews =
from the WG, so we need more review from the SPRING WG.

If you are aware of an implementation of this document, please report the i=
mplementation either on the list or to the chairs so that the shepherd can =
report implementations in the writeup.

Note that I'll forward that call to the SFC WG.

Thanks!

[1] https://tools.ietf.org/html/draft-ietf-spring-nsh-sr

--Bruno


___________________________________________________________________________=
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___________________________________________________________________________=
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Ce message et ses pieces jointes peuvent contenir des informations confiden=
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Orange decline toute responsabilite si ce message a ete altere, deforme ou =
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"index heading"/>
<w:LsdException Locked=3D"false" Priority=3D"35" SemiHidden=3D"true" Unhide=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"table of figures"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"envelope address"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"envelope return"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"footnote reference"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"annotation reference"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"line number"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"page number"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"endnote reference"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"endnote text"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"table of authorities"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"macro"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"toa heading"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Bullet"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Number"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List 4"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List 5"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Bullet 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Bullet 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Bullet 4"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Bullet 5"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Number 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Number 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Number 4"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Number 5"/>
<w:LsdException Locked=3D"false" Priority=3D"10" QFormat=3D"true" Name=3D"T=
itle"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Closing"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Signature"/>
<w:LsdException Locked=3D"false" Priority=3D"1" SemiHidden=3D"true" UnhideW=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Body Text"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Continue"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Continue 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Continue 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Continue 4"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"List Continue 5"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Message Header"/>
<w:LsdException Locked=3D"false" Priority=3D"11" QFormat=3D"true" Name=3D"S=
ubtitle"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Salutation"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Date"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Body Text First Indent"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Body Text First Indent 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Note Heading"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Body Text 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Body Text 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Body Text Indent 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Body Text Indent 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Block Text"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Hyperlink"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"FollowedHyperlink"/>
<w:LsdException Locked=3D"false" Priority=3D"22" QFormat=3D"true" Name=3D"S=
trong"/>
<w:LsdException Locked=3D"false" Priority=3D"20" QFormat=3D"true" Name=3D"E=
mphasis"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Document Map"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Plain Text"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"E-mail Signature"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Top of Form"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Bottom of Form"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Normal (Web)"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Acronym"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Address"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Cite"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Code"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Definition"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Keyboard"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Preformatted"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Sample"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Typewriter"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"HTML Variable"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Normal Table"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"annotation subject"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"No List"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 4"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 5"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table List 7"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Elegant"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" Priority=3D"39" Name=3D"Table Grid"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Placeholder Te=
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<w:LsdException Locked=3D"false" Priority=3D"1" QFormat=3D"true" Name=3D"No=
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<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
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<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
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<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
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<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
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<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Revision"/>
<w:LsdException Locked=3D"false" Priority=3D"34" QFormat=3D"true" Name=3D"L=
ist Paragraph"/>
<w:LsdException Locked=3D"false" Priority=3D"29" QFormat=3D"true" Name=3D"Q=
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<w:LsdException Locked=3D"false" Priority=3D"30" QFormat=3D"true" Name=3D"I=
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<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
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<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
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<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 1=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
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<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
2"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
2"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
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<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
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<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 2=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
3"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
3"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 3=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
4"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
4"/>
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<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">Speaking as the shepherd.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">Thanks for the -04 which answer my previous
 set of comments.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">I&#8217;ve reviewed the document again, focusing
 on the new text. Please find below some additional comments.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">=3D=3D=3D<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">SR-MPLS<span style=3D"mso-spacerun:yes">&nbsp;
</span>=A76.1<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">&quot; At the end of the SR-MPLS path it is necessary
 to provide an<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><span style=3D"mso-spacerun:yes">&nbsp;&nbsp;
</span>indication to the tail-end that NSH follows the SR-MPLS label stack<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><span style=3D"mso-spacerun:yes">&nbsp;&nbsp;
</span>as described by [RFC8596].&quot;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><span style=3D"mso-spacerun:yes">&nbsp;&nbsp;
</span><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">My understanding is that RFC8596 performs
 the above goal by adding an SFF label at the bottom of the stack. In which=
 case it would not be mandatory to disable Penultimate Hop Popping on the p=
refix SID as draft-ietf-spring-nsh-sr-04 is mandating.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span class=3D"SpellE"><span lang=3D"EN-GB" style=3D=
"mso-ascii-font-family:Calibri;mso-fareast-font-family:Calibri;mso-hansi-fo=
nt-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;color:#1=
F497D;mso-ansi-language:EN-GB">I&quot;m</span></span><span lang=3D"EN-GB" s=
tyle=3D"mso-ascii-font-family:Calibri;mso-fareast-font-family:Calibri;mso-h=
ansi-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;c=
olor:#1F497D;mso-ansi-language:EN-GB">
 seeing two options that you could either choose from or describe both:<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">- a prefix SID dedicated to NSH. In which
 case PHP needs to be disabled and there is no need for the SFF label speci=
fied in RFC8596 (alternatively, this prefix SID is _the_ SFF label defined =
in RFC8596, although 8596 refers to a local label(segment) while usually a =
prefix SID is a global segment)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">- use a multi-purpose prefix SID. In which
 case, indeed &quot; At the end of the SR-MPLS path it is necessary to prov=
ide an<span style=3D"mso-spacerun:yes">&nbsp;
</span>indication to the tail-end that NSH follows the SR-MPLS label stack<=
span style=3D"mso-spacerun:yes">&nbsp;
</span>as described by [RFC8596].<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><span style=3D"mso-spacerun:yes">&nbsp;&nbsp;
</span><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;</span><o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">Also<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;
</span><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">&quot;<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;
</span>At the end of the SR-MPLS path it is necessary to provide an<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><span style=3D"mso-spacerun:yes">&nbsp;&nbsp;
</span>indication to the tail-end that NSH follows the SR-MPLS label stack<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><span style=3D"mso-spacerun:yes">&nbsp;&nbsp;
</span>as described by [RFC8596].&quot;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">In the scheme &quot;SR-based SFC&quot;, &quot;the end of
 the SR-MPLS&quot; is only the last SF (not all other SF on the SF chain).<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">So how does others SFC have an indication
 that the NSH follows the SR-MPLS label stack?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">Alternatively something along :s/ end of
 the SR-MPLS path/for all the SF along the SR-MPLS path<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><span style=3D"mso-spacerun:yes">&nbsp;&nbsp;
</span><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">=3D=3D=3D<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">This document defines two schemes: NSH-based
 SFC and SR-based SFC.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">=A75 is called &quot;Packet Processing Details&quot;
 but seems to only cover SRv6 and<span style=3D"mso-spacerun:yes">&nbsp; </=
span>the &quot;SR-based SFC&quot; scheme.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">If so,
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">- it would be good if the title/section
 hierarchy could reflect this.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">- what about the
<span class=3D"SpellE">behavior</span> for SR-MPLS with the &quot;SR-based =
SFC&quot; scheme (a priori with SR-MPLS you equally need a cache in order t=
o re-push the SR-MPLS header)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">=3D=3D=3D=3D<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">=A74<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">For &quot;SR-based SFC&quot;, my understanding is
 that the Service Chain (ordered list of SF) is specified in the list of se=
gments.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">Please forgive my lack of NSH knowledge,
 but it seems to me that the NSH SPI look up may return multiple next-hop w=
ithin a service path for a given SF (e.g. for load balancing). (<span class=
=3D"SpellE">cf</span> table 4 of RFC 8600).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">Here, if the NSH SPI change the SFC next-hop,
 the SR header on the packet will be completely wrong (well most probably t=
he list of segment will override the choice from the NSH SPI look up). Is t=
his a correct understanding? If so is this a bug or a feature? Either way, =
may be some text would need to be
 added. e.g. to warn that such SFC feature is not available anymore.<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">=3D=3D=3D=3D=3D<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">Nits:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">- I'm not a fan of the use of the term &quot;details&quot;
 which to me are &quot;specifications&quot;. (e.g. &quot;5. Packet Processi=
ng Details&quot;, &quot;6. Encapsulation Details&quot;, &quot;encapsulation=
 details&quot;)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">- ID Nits still reports one error (**) on
 the new text (in the abstract).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/draft=
-ietf-spring-nsh-sr-04.txt<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">--Bruno<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><span class=3D"SpellE"><b><span style=3D"mso-fareast=
-font-family:&quot;Times New Roman&quot;;mso-bidi-font-family:Calibri;mso-f=
areast-language:FR">From</span></b></span><b><span style=3D"mso-fareast-fon=
t-family:&quot;Times New Roman&quot;;mso-bidi-font-family:Calibri;mso-farea=
st-language:FR">:</span></b><span style=3D"mso-fareast-font-family:&quot;Ti=
mes New Roman&quot;;mso-bidi-font-family:Calibri;mso-fareast-language:FR">
<span class=3D"SpellE">spring</span> [mailto:spring-bounces@ietf.org] <b>On=
 Behalf Of
</b>bruno.decraene@orange.com<br>
<b>Sent:</b> Tuesday, February 9, 2021 7:31 PM<br>
<b>To:</b> spring@ietf.org<br>
<b>Cc:</b> draft-ietf-spring-nsh-sr@ietf.org<br>
<b>Subject:</b> [spring] WG Last Call draft-ietf-spring-nsh-sr<o:p></o:p></=
span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">Dear WG, <o:p>
</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">This message starts a 2 weeks WG last call for draft-ietf-spring-nsh-sr =
[1].<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">After review of the document please indicate whether you believe this do=
cument should be progressed to the IESG.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">In addition to yes/no, please consider providing a technical review of t=
his document; in particular if you care for this document.<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">Indeed, since WG adoption, this document had benefited from little revie=
ws from the WG, so we need more review from the SPRING WG.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">If you are aware of an implementation of this document, please report th=
e implementation either on the list or to the chairs so that the shepherd c=
an report implementations in the writeup.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">Note that I&#8217;ll forward that call to the SFC WG.<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal">Thanks!<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">[1] <a href=3D"https://tools.ietf.org/html/draft-iet=
f-spring-nsh-sr">
https://tools.ietf.org/html/draft-ietf-spring-nsh-sr</a><o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">--Bruno<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<pre>______________________________________________________________________=
___________________________________________________<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>Ce message et ses pieces jointes peuvent contenir des informations con=
fidentielles ou privilegiees et ne doivent donc<o:p></o:p></pre>
<pre>pas etre diffuses, exploites ou copies sans autorisation. Si vous avez=
 recu ce message par erreur, veuillez le signaler<o:p></o:p></pre>
<pre>a l'expediteur et le detruire ainsi que les pieces jointes. Les messag=
es electroniques etant susceptibles d'alteration,<o:p></o:p></pre>
<pre>Orange decline toute responsabilite si ce message a ete altere, deform=
e ou falsifie. Merci.<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>This message and its attachments may contain confidential or privilege=
d information that may be protected by law;<o:p></o:p></pre>
<pre>they should not be distributed, used or copied without authorisation.<=
o:p></o:p></pre>
<pre>If you have received this email in error, please notify the sender and=
 delete this message and its attachments.<o:p></o:p></pre>
<pre>As emails may be altered, Orange is not liable for messages that have =
been modified, changed or falsified.<o:p></o:p></pre>
<pre>Thank you.<o:p></o:p></pre>
</div>
</div>
<PRE>______________________________________________________________________=
___________________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler
a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;
they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and dele=
te this message and its attachments.
As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.
Thank you.
</PRE></body>
</html>

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Dear SFC WG,

The SPRING WG is starting a working group last call for draft-ietf-spring-n=
sh-sr. [1]
This document describes the integration of Network Service Header (NSH) [RF=
C8300] and Segment Routing (SR) [RFC8402], as well as  encapsulation detail=
s, to support Service Function Chaining (SFC)  [RFC7665].

The SPRING WG would welcome SFC WG review of this document, more specifical=
ly on the SFC and NSH related aspects.
Please send the comments on the SPRING WG list.

Thank you,
Best regards,
--Bruno


[1] https://tools.ietf.org/html/draft-ietf-spring-nsh-sr


From: spring [mailto:spring-bounces@ietf.org] On Behalf Of bruno.decraene@o=
range.com
Sent: Tuesday, February 9, 2021 7:06 PM
To: spring@ietf.org; draft-ietf-spring-nsh-sr@ietf.org
Subject: [spring] IPR call for draft-ietf-spring-nsh-sr

Hi authors, contributors, WG

Authors of draft-ietf-spring-nsh-sr have asked for WG last call.
In preparation of the WGLC on draft-ietf-spring-nsh-sr [1], this email star=
ts a poll for IPR.

If you are aware of IPR that applies to draft-ietf-spring-nsh-sr please res=
pond to this email and keep the mailing list in copy.
If you are aware of IPR, please indicate whether it has been disclosed in a=
ccordance to the IETF IPR rules (detailed are described in RFCs 3979, 4879,=
 3669 and 5378).

If you are an *author or contributor* please respond to this email, on the =
SPRING mailing list, regardless of whether or not you're aware of any IPR.
If you are not an author or contributor, please explicitly respond only if =
you're aware of IPR that has not yet been disclosed.

Thanks,
Regards,
Bruno, Jim, Joel

[1] https://tools.ietf.org/html/draft-ietf-spring-nsh-sr


From: spring [mailto:spring-bounces@ietf.org] On Behalf Of bruno.decraene@o=
range.com<mailto:bruno.decraene@orange.com>
Sent: Monday, November 2, 2020 4:26 PM
To: spring@ietf.org<mailto:spring@ietf.org>; draft-ietf-spring-nsh-sr@ietf.=
org<mailto:draft-ietf-spring-nsh-sr@ietf.org>
Subject: [spring] draft-ietf-spring-nsh-sr

Hi authors, WG,

Authors of draft-ietf-spring-nsh-sr have asked for WG last call.
Before initiating it, I've done a review of the draft as document shepherd.
Please find below some comments.

---
It's not crystal clear to me what the scope and the goal of the document ar=
e.

-          From the abstract, it's an informative description of two applic=
ations scenarios

-          From section 5, it's a specification of how to integrate NSH and=
 SR.

o   Although it's only really specified for SRv6 and not SR-MPLS.

Please clarify to update the document as needed.

----
IdNits reports for 2 errors. [1]
  ** Downref: Normative reference to an Informational RFC: RFC 7665

-          Probably the only really normative reference is in the security =
section. Do you think that a reference to RFC8300 could be used instead (83=
00 has a large security consideration section)?

-          I noticed that 8300 had the same issue. What was the feedback fr=
om AD at the time?

  ** There are 4 instances of too long lines in the document, the longest o=
ne
     being 82 characters in excess of 72.
Could you please correct in the next version of the draft?

[1] https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/draft-iet=
f-spring-nsh-sr-03.txt
-----
Abstract


The abstract feels like the document is informational (e.g., This document =
describes two application scenarios")
But the document asks for an IANA allocation requiring a STD track document=
, so the draft needs to be std track.
Do you think that you could add that the document defines the encapsulation=
 of NSH for SR-MPLS and SRv6?

----
The introduction section seems to be coming from the SFC WG.

-          May be adding some text about SPRING?

-          Although this is a personal opinion, I find some sentences a bit=
 marketing oriented. Could you please have a look? E.g.

o    "The SFC architecture has the merit to not make assumptions"
What about "The SFC architecture does not make assumptions"? This seems mor=
e neutral.

o    "Among all these approaches, the IETF endorsed a transport-independent

-             SFC encapsulation scheme: NSH [RFC8300<https://tools.ietf.org=
/html/rfc8300>]; which is the most mature SFC encapsulation solution. =BB
I'm not sure how much "is the most mature" is true or not. I'm not sure tha=
t the SPRING WG needs to make such statement nor that it is best placed to =
make such statement.
I'm not sure about "the IETF endorsed a transport-independent  SFC encapsul=
ation scheme". Idem with regards to SPRING WG. I'm not sure that this is a =
typical statement in RFC. If so, it feels like the IETF would have equally =
endorsed transport-depending SFC encapsulation scheme. [RFC8595] https://to=
ols.ietf.org/html/rfc8595

-          "This design is pragmatic"
Looks like an opinion. Plus I'm not sure that the SPRING WG needs to judge =
the work of the SFC WG.
----
=A72

"The two SR flavors, namely SR-MPLS [RFC8660<https://tools.ietf.org/html/rf=
c8660>] and SRv6 [RFC8754<https://tools.ietf.org/html/rfc8754>],"

May be :s/flavors/data plane


"Further considerations such as simplifying classification at intermediate =
SFs"
I'm not sure that simplifying classification is the main point of adding NS=
H. RFC8595 does not refers to this. A priori SR supports a single initial c=
lassification.


----
=A72

"A classifier SHOULD assign an NSH Service Path Identifier (SPI) per

   SR policy so that different traffic flows that use the same NSH

   Service Function Path (SFP) but different SR policy can coexist on

   the same SFP without conflict during SFF processing."



Is the above sentence applicable to both applications scenarios or only for=
 the second one (SR-based SFC with integrated NSH service plane)?

In the current text, it's applicable to both while I'm not sure that it's a=
pplicable to "NSH-based SFC with SR-based transport plane" where the transp=
ort plane (hence the SR policy) is independent of the service plane.

---

=AB hierarchical SFC [RFC8459<https://tools.ietf.org/html/rfc8459>] =BB

Does this document specifically covers hierarchical SFC (hence hierarchical=
 SFC & SR)? Is this reference really pertinent?


---
=A73
Section 3 barely speaks about SR. Is this really a SPRING document?

When SR is refered to, there is nothing specific to SR.

e.g. "After removing the outer transport encapsulation, that may or may not=
 be SR-MPLS or SRv6,"
If the document is related to the integration of SFC and SR, surely the enc=
apsulation is either SR-MPLS or SRv6 (rather than may or may not be SR).

May be indicating that in this scenario, there is a priori one SR-policy pe=
r SF (while in the next scenario, there is a single SR-policy for the whole=
 service chain). That would talk about SR and may provide a key distinction=
 between both.





  " At the end of the SR-MPLS path it is necessary to provide an

   indication to the tail-end that NSH follows the SR-MPLS label stack.

   There are several ways to achieve this but its specification is

   outside the scope of this document."


I agree that this is necessary.
But why is the main  text related to SR-MPLS in this scenario, not specifyi=
ng the behaviour?
I  don't follow the logic of specifying it for SRv6 (and hence requiring th=
is document to be standard track while otherwise it could be an information=
al document describing two scenarios) and not specifying it for SR-MPLS.

Note that this text is duplicated in =A75.1. And 5.1 is nearly defining one=
 proposition, so why not saying that this is a solution? (there is no need =
to define the encoding for the control plane since this part would likely n=
ot be in a spring document) (a

   specific prefix-SID be allocated at each node for use by the SFC

   application for this purpose.)


---
=A74

   The benefits of this scheme include:



[...].



   o  It simplifies the SFF (i.e., the SR router) by nullifying the

      needs for re-classification and SR proxy.

Regarding the need for reclassification, it seems to me that SR alone can n=
ullify

Regarding the need for SR proxy, the behaviour described seems very close t=
o a SR proxy "The SFF strips

   the SR information of the packet, updates the SR information, and

   saves it to a cache indexed by the NSH SPI.  This saved SR

   information is used to encapsulate and forward the packet(s) coming

   back from the SF. =BB






   o  It provides a unique and standard way to pass metadata to SFs.

      Note that currently there is no solution for SR-MPLS to carry

      metadata and there is no solution to pass metadata to SR-unaware

      SFs.

RFC8595 provides another standard way to pass meta data for SR-MPLS.
https://tools.ietf.org/html/rfc8595#section-12

---
=A77.2

"   Encapsulation of NSH following SRv6 may be indicated either by

   encapsulating NSH in UDP (UDP port TBA1) and indicating UDP in the

   Next Header field of the SRH, or by indicating an IP protocol number

   for NSH in the Next Header of the SRH. "


Why is there a need for two solutions?
If so, what are the applicability statement or pro&con of each?
For interop purpose, which one is mandatory and which one is optional?

Thanks,
Regards,
--Bruno

___________________________________________________________________________=
______________________________________________



Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc

pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler

a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,

Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.



This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;

they should not be distributed, used or copied without authorisation.

If you have received this email in error, please notify the sender and dele=
te this message and its attachments.

As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.

Thank you.

___________________________________________________________________________=
______________________________________________



Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc

pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler

a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,

Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.



This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;

they should not be distributed, used or copied without authorisation.

If you have received this email in error, please notify the sender and dele=
te this message and its attachments.

As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.

Thank you.

___________________________________________________________________________=
______________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler
a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
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<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Subtle 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Web 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Web 2"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Web 3"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Balloon Text"/>
<w:LsdException Locked=3D"false" Priority=3D"39" Name=3D"Table Grid"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" UnhideWhenUsed=3D"true=
" Name=3D"Table Theme"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Placeholder Te=
xt"/>
<w:LsdException Locked=3D"false" Priority=3D"1" QFormat=3D"true" Name=3D"No=
 Spacing"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
1"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
1"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" SemiHidden=3D"true" Name=3D"Revision"/>
<w:LsdException Locked=3D"false" Priority=3D"34" QFormat=3D"true" Name=3D"L=
ist Paragraph"/>
<w:LsdException Locked=3D"false" Priority=3D"29" QFormat=3D"true" Name=3D"Q=
uote"/>
<w:LsdException Locked=3D"false" Priority=3D"30" QFormat=3D"true" Name=3D"I=
ntense Quote"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 1=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 1"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
2"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
2"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 2=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 2"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
3"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
3"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 3=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 3"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
4"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
4"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 4=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 4"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
5"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
5"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 5=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 5"/>
<w:LsdException Locked=3D"false" Priority=3D"60" Name=3D"Light Shading Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"61" Name=3D"Light List Accent =
6"/>
<w:LsdException Locked=3D"false" Priority=3D"62" Name=3D"Light Grid Accent =
6"/>
<w:LsdException Locked=3D"false" Priority=3D"63" Name=3D"Medium Shading 1 A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"64" Name=3D"Medium Shading 2 A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"65" Name=3D"Medium List 1 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"66" Name=3D"Medium List 2 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"67" Name=3D"Medium Grid 1 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"68" Name=3D"Medium Grid 2 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"69" Name=3D"Medium Grid 3 Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"70" Name=3D"Dark List Accent 6=
"/>
<w:LsdException Locked=3D"false" Priority=3D"71" Name=3D"Colorful Shading A=
ccent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"72" Name=3D"Colorful List Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"73" Name=3D"Colorful Grid Acce=
nt 6"/>
<w:LsdException Locked=3D"false" Priority=3D"19" QFormat=3D"true" Name=3D"S=
ubtle Emphasis"/>
<w:LsdException Locked=3D"false" Priority=3D"21" QFormat=3D"true" Name=3D"I=
ntense Emphasis"/>
<w:LsdException Locked=3D"false" Priority=3D"31" QFormat=3D"true" Name=3D"S=
ubtle Reference"/>
<w:LsdException Locked=3D"false" Priority=3D"32" QFormat=3D"true" Name=3D"I=
ntense Reference"/>
<w:LsdException Locked=3D"false" Priority=3D"33" QFormat=3D"true" Name=3D"B=
ook Title"/>
<w:LsdException Locked=3D"false" Priority=3D"37" SemiHidden=3D"true" Unhide=
WhenUsed=3D"true" Name=3D"Bibliography"/>
<w:LsdException Locked=3D"false" Priority=3D"39" SemiHidden=3D"true" Unhide=
WhenUsed=3D"true" QFormat=3D"true" Name=3D"TOC Heading"/>
<w:LsdException Locked=3D"false" Priority=3D"41" Name=3D"Plain Table 1"/>
<w:LsdException Locked=3D"false" Priority=3D"42" Name=3D"Plain Table 2"/>
<w:LsdException Locked=3D"false" Priority=3D"43" Name=3D"Plain Table 3"/>
<w:LsdException Locked=3D"false" Priority=3D"44" Name=3D"Plain Table 4"/>
<w:LsdException Locked=3D"false" Priority=3D"45" Name=3D"Plain Table 5"/>
<w:LsdException Locked=3D"false" Priority=3D"40" Name=3D"Grid Table Light"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark"=
/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 5"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"Grid Table 1 Light=
 Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"Grid Table 2 Accen=
t 6"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"Grid Table 3 Accen=
t 6"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"Grid Table 4 Accen=
t 6"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"Grid Table 5 Dark =
Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"Grid Table 6 Color=
ful Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"Grid Table 7 Color=
ful Accent 6"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"List Table 5 Dark"=
/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"List Table 6 Color=
ful"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"List Table 7 Color=
ful"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
 Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4 Accen=
t 1"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"List Table 5 Dark =
Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"List Table 6 Color=
ful Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"List Table 7 Color=
ful Accent 1"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
 Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4 Accen=
t 2"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"List Table 5 Dark =
Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"List Table 6 Color=
ful Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"List Table 7 Color=
ful Accent 2"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
 Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4 Accen=
t 3"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"List Table 5 Dark =
Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"List Table 6 Color=
ful Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"List Table 7 Color=
ful Accent 3"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
 Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"48" Name=3D"List Table 3 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"49" Name=3D"List Table 4 Accen=
t 4"/>
<w:LsdException Locked=3D"false" Priority=3D"50" Name=3D"List Table 5 Dark =
Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"51" Name=3D"List Table 6 Color=
ful Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"52" Name=3D"List Table 7 Color=
ful Accent 4"/>
<w:LsdException Locked=3D"false" Priority=3D"46" Name=3D"List Table 1 Light=
 Accent 5"/>
<w:LsdException Locked=3D"false" Priority=3D"47" Name=3D"List Table 2 Accen=
t 5"/>
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</head>
<body lang=3D"FR" link=3D"#0563C1" vlink=3D"#954F72" style=3D"tab-interval:=
35.4pt">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">Dear SFC WG,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">The SPRING WG is starting a working group
 last call for </span><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-=
language:EN-GB">draft-<span class=3D"SpellE">ietf</span>-spring-<span class=
=3D"SpellE">nsh</span>-sr. [1]</span><span lang=3D"EN-GB" style=3D"mso-asci=
i-font-family:Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family=
:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso=
-ansi-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">This document describes the integration
 of Network Service Header (NSH) [RFC8300] and Segment Routing (SR) [RFC840=
2], as well as<span style=3D"mso-spacerun:yes">&nbsp;
</span>encapsulation details, to support Service Function Chaining (SFC)<sp=
an style=3D"mso-spacerun:yes">&nbsp;
</span>[RFC7665].<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">The SPRING WG would welcome SFC WG review
 of this document, more specifically on the SFC and NSH related aspects.<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">Please send the comments on the SPRING WG
 list.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">Thank you,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">Best regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB">--Bruno<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">[1]
<a href=3D"https://tools.ietf.org/html/draft-ietf-spring-nsh-sr">https://to=
ols.ietf.org/html/draft-ietf-spring-nsh-sr</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ascii-font-family:=
Calibri;mso-fareast-font-family:Calibri;mso-hansi-font-family:Calibri;mso-b=
idi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language=
:EN-GB"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><span class=3D"SpellE"><b><span style=3D"mso-fareast=
-font-family:&quot;Times New Roman&quot;;mso-bidi-font-family:Calibri;mso-f=
areast-language:FR">From</span></b></span><b><span style=3D"mso-fareast-fon=
t-family:&quot;Times New Roman&quot;;mso-bidi-font-family:Calibri;mso-farea=
st-language:FR">:</span></b><span style=3D"mso-fareast-font-family:&quot;Ti=
mes New Roman&quot;;mso-bidi-font-family:Calibri;mso-fareast-language:FR">
<span class=3D"SpellE">spring</span> [mailto:spring-bounces@ietf.org] <b>On=
 Behalf Of
</b>bruno.decraene@orange.com<br>
<b>Sent:</b> Tuesday, February 9, 2021 7:06 PM<br>
<b>To:</b> spring@ietf.org; draft-ietf-spring-nsh-sr@ietf.org<br>
<b>Subject:</b> [spring] IPR call for draft-ietf-spring-nsh-sr<o:p></o:p></=
span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Hi authors, contributors, WG<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Authors of draft-ietf-spring-nsh-sr have asked for WG last=
 call.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">In preparation of the WGLC on draft-ietf-spring-nsh-sr [1]=
, this email starts a poll for IPR.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">If you are aware of IPR that applies to draft-ietf-spring-=
nsh-sr please respond to this email and keep the mailing list in copy.<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">If you are aware of IPR, please indicate whether it has be=
en disclosed in accordance to the IETF IPR rules (detailed are described in=
 RFCs 3979, 4879, 3669 and 5378).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">If you are an *author or contributor* please respond to th=
is email, on the SPRING mailing list, regardless of whether or not you're a=
ware of any IPR.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">If you are not an author or contributor, please explicitly=
 respond only if you're aware of IPR that has not yet been disclosed.<o:p><=
/o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Bruno, Jim, Joel<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">[1]
<a href=3D"https://tools.ietf.org/html/draft-ietf-spring-nsh-sr">https://to=
ols.ietf.org/html/draft-ietf-spring-nsh-sr</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-outline-level:1"><b><span style=3D"mso-=
fareast-font-family:&quot;Times New Roman&quot;;mso-bidi-font-family:Calibr=
i;mso-fareast-language:FR">From:</span></b><span style=3D"mso-fareast-font-=
family:&quot;Times New Roman&quot;;mso-bidi-font-family:Calibri;mso-fareast=
-language:FR">
 spring [<a href=3D"mailto:spring-bounces@ietf.org">mailto:spring-bounces@i=
etf.org</a>]
<b>On Behalf Of </b><a href=3D"mailto:bruno.decraene@orange.com">bruno.decr=
aene@orange.com</a><br>
<b>Sent:</b> Monday, November 2, 2020 4:26 PM<br>
<b>To:</b> <a href=3D"mailto:spring@ietf.org">spring@ietf.org</a>; <a href=
=3D"mailto:draft-ietf-spring-nsh-sr@ietf.org">
draft-ietf-spring-nsh-sr@ietf.org</a><br>
<b>Subject:</b> [spring] draft-ietf-spring-nsh-sr<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Hi authors, WG,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Authors of draft-ietf-spring-nsh-sr have asked for WG last=
 call.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Before initiating it, I&#8217;ve done a review of the draf=
t as document shepherd.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Please find below some comments.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">---<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">It&#8217;s not crystal clear to me what the scope and the =
goal of the document are.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D;m=
so-ansi-language:EN-GB"><span style=3D"mso-list:Ignore">-<span style=3D"fon=
t:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D;=
mso-ansi-language:EN-GB">From the abstract, it&#8217;s an informative descr=
iption of two applications scenarios<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D;m=
so-ansi-language:EN-GB"><span style=3D"mso-list:Ignore">-<span style=3D"fon=
t:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D;=
mso-ansi-language:EN-GB">From section 5, it&#8217;s a specification of how =
to integrate NSH and SR.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l1 level2 lfo2">
<![if !supportLists]><span lang=3D"EN-GB" style=3D"font-family:&quot;Courie=
r New&quot;;mso-fareast-font-family:&quot;Courier New&quot;;color:#1F497D;m=
so-ansi-language:EN-GB"><span style=3D"mso-list:Ignore">o<span style=3D"fon=
t:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D;=
mso-ansi-language:EN-GB">Although it&#8217;s only really specified for SRv6=
 and not SR-MPLS.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Please clarify to update the document as needed.<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">IdNits reports for 2 errors. [1]
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-GB;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;</span>** Downref: Normative reference to an Informational RFC:
 RFC 7665<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D;m=
so-ansi-language:EN-GB;mso-fareast-language:EN-US"><span style=3D"mso-list:=
Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"mso-bidi-font-=
family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language:EN-GB;ms=
o-fareast-language:EN-US">Probably the only really normative reference is i=
n the security section. Do you think that a reference
 to RFC8300 could be used instead (8300 has a large security consideration =
section)?<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D;m=
so-ansi-language:EN-GB;mso-fareast-language:EN-US"><span style=3D"mso-list:=
Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"mso-bidi-font-=
family:&quot;Times New Roman&quot;;color:#1F497D;mso-ansi-language:EN-GB;ms=
o-fareast-language:EN-US">I noticed that 8300 had the same issue. What was =
the feedback from AD at the time?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-GB;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;
</span>** There are 4 instances of too long lines in the document, the long=
est one<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-GB;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;&nbsp;&nbsp;
</span>being 82 characters in excess of 72.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:35.4pt"><span lang=3D"EN-GB" st=
yle=3D"color:#1F497D;mso-ansi-language:EN-GB">Could you please correct in t=
he next version of the draft?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">[1]
<a href=3D"https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/dr=
aft-ietf-spring-nsh-sr-03.txt">
https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/draft-ietf-sp=
ring-nsh-sr-03.txt</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">-----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Abstract<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"font-size:11.0pt;font-family:&quot;Calib=
ri&quot;,sans-serif;mso-fareast-font-family:Calibri;mso-bidi-font-family:&q=
uot;Times New Roman&quot;;color:#1F497D;mso-ansi-language:EN-GB;mso-fareast=
-language:EN-US">The abstract feels like the document is informational (e.g=
.,</span><span lang=3D"EN-GB" style=3D"font-family:&quot;Calibri&quot;,sans=
-serif;mso-bidi-font-family:&quot;Times New Roman&quot;;color:#1F497D;mso-a=
nsi-language:EN-GB;mso-fareast-language:EN-US"> </span><span lang=3D"EN-GB"=
 style=3D"mso-ansi-language:EN-GB">This document describes two application =
scenarios&#8221;)<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">But the document asks for an IANA allocation requiring a S=
TD track document, so the draft needs to be std track.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Do you think that you could add that the document defines =
the encapsulation of NSH for SR-MPLS and SRv6?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">The introduction section seems to be coming from the SFC W=
G.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D;m=
so-ansi-language:EN-GB"><span style=3D"mso-list:Ignore">-<span style=3D"fon=
t:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D;=
mso-ansi-language:EN-GB">May be adding some text about SPRING?<o:p></o:p></=
span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"mso-ansi-langua=
ge:EN-GB"><span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &quot;=
Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D;=
mso-ansi-language:EN-GB">Although this is a personal opinion, I find some s=
entences a bit marketing oriented. Could you please have a look? E.g.
</span><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p></o:p></=
span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo4">
<![if !supportLists]><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-fa=
mily:&quot;Courier New&quot;;mso-fareast-font-family:&quot;Courier New&quot=
;;mso-ansi-language:EN-GB"><span style=3D"mso-list:Ignore">o<span style=3D"=
font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D;=
mso-ansi-language:EN-GB">&#8220;</span><span lang=3D"EN-GB" style=3D"mso-an=
si-language:EN-GB">The SFC architecture has the merit to not make
</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Cou=
rier New&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi=
-language:EN-GB">assumptions</span><span lang=3D"EN-GB" style=3D"mso-ansi-l=
anguage:EN-GB">&#8221;<br>
<span style=3D"color:#1F497D">What about &#8220;The SFC architecture does n=
ot make assumptions&#8221;? This seems more neutral.</span>
</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Cou=
rier New&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi=
-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo4">
<![if !supportLists]><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-fa=
mily:&quot;Courier New&quot;;mso-fareast-font-family:&quot;Courier New&quot=
;;mso-ansi-language:EN-GB"><span style=3D"mso-list:Ignore">o<span style=3D"=
font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"mso-ansi-langu=
age:EN-GB">&#8220;</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;fon=
t-family:&quot;Courier New&quot;;mso-fareast-font-family:&quot;Times New Ro=
man&quot;;mso-ansi-language:EN-GB">Among all these approaches, the
 IETF endorsed a transport-independent<o:p></o:p></span></p>
<pre style=3D"margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo=
4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"font-family:&quot;Cal=
ibri&quot;,sans-serif;mso-fareast-font-family:Calibri;mso-ansi-language:EN-=
GB"><span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &quot;Times =
New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </s=
pan></span></span><![endif]><span lang=3D"EN-GB" style=3D"mso-ansi-language=
:EN-GB"><span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;</span>SFC encap=
sulation scheme: NSH [</span><a href=3D"https://tools.ietf.org/html/rfc8300=
" title=3D"&quot;Network Service Header (NSH)&quot;"><span lang=3D"EN-GB" s=
tyle=3D"mso-fareast-font-family:Calibri;mso-ansi-language:EN-GB">RFC8300</s=
pan></a><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB">]; which is =
the most mature SFC encapsulation solution.&nbsp;=BB<br><span style=3D"colo=
r:#1F497D">I&#8217;m not sure how much &#8220;is the most mature&#8221; is =
true or not. I&#8217;m not sure that the SPRING WG needs to make such state=
ment nor that it is best placed to make such statement.<br>I&#8217;m not su=
re about &#8220;</span>the IETF endorsed a transport-independent<span style=
=3D"mso-spacerun:yes">&nbsp; </span>SFC encapsulation scheme&#8221;. <span =
style=3D"color:#1F497D">Idem with regards to SPRING WG. I&#8217;m not sure =
that this is a typical statement in RFC. If so, it feels like the IETF woul=
d have equally endorsed transport-depending SFC encapsulation scheme. [RFC8=
595] <a href=3D"https://tools.ietf.org/html/rfc8595">https://tools.ietf.org=
/html/rfc8595</a></span><o:p></o:p></span></pre>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"font-size:10.0p=
t;mso-ansi-language:EN-GB"><span style=3D"mso-list:Ignore">-<span style=3D"=
font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"font-size:10.0=
pt;font-family:&quot;Courier New&quot;;mso-fareast-font-family:&quot;Times =
New Roman&quot;;mso-ansi-language:EN-GB">&#8220;This design is pragmatic&#8=
221;<br>
</span><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB"=
>Looks like an opinion. Plus I&#8217;m not sure that the SPRING WG needs to=
 judge the work of the SFC WG.</span><span lang=3D"EN-GB" style=3D"font-siz=
e:10.0pt;font-family:&quot;Courier New&quot;;mso-fareast-font-family:&quot;=
Times New Roman&quot;;mso-ansi-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-font-family:&quot;Times New Roma=
n&quot;;mso-ansi-language:EN-GB">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-font-family:&quot;Times New Roma=
n&quot;;mso-ansi-language:EN-GB">=A72<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB">&#8220;The two =
SR flavors, namely SR-MPLS [</span><a href=3D"https://tools.ietf.org/html/r=
fc8660" title=3D"&quot;Segment Routing with the MPLS Data Plane&quot;"><spa=
n lang=3D"EN-GB" style=3D"mso-fareast-font-family:Calibri;mso-ansi-language=
:EN-GB">RFC8660</span></a><span lang=3D"EN-GB" style=3D"mso-ansi-language:E=
N-GB">] and SRv6 [</span><a href=3D"https://tools.ietf.org/html/rfc8754" ti=
tle=3D"&quot;IPv6 Segment Routing Header (SRH)&quot;"><span lang=3D"EN-GB" =
style=3D"mso-fareast-font-family:Calibri;mso-ansi-language:EN-GB">RFC8754</=
span></a><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB">],&#8221;<o=
:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">M=
ay be :s/flavors/data plane</span><span lang=3D"EN-GB" style=3D"mso-ansi-la=
nguage:EN-GB"><o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-font-family:&quot;Times New Roma=
n&quot;;mso-ansi-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB">&#8220;Further =
considerations such as simplifying classification at intermediate SFs&#8221=
;<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">I&#8217;m not sure that simplifying classification is the =
main point of adding NSH. RFC8595 does not refers to this. A priori SR supp=
orts a single initial classification.</span><span lang=3D"EN-GB" style=3D"f=
ont-size:10.0pt;font-family:&quot;Courier New&quot;;mso-fareast-font-family=
:&quot;Times New Roman&quot;;mso-ansi-language:EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt"><span lang=3D"EN=
-GB" style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;;mso-fare=
ast-font-family:&quot;Times New Roman&quot;;mso-ansi-language:EN-GB"><o:p>&=
nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">=A72<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB">&#8220;A classi=
fier SHOULD assign an NSH Service Path Identifier (SPI) per<o:p></o:p></spa=
n></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>SR policy so that different traffic f=
lows that use the same NSH<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>Service Function Path (SFP) but diffe=
rent SR policy can coexist on<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>the same SFP without conflict during =
SFF processing.&#8221;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">I=
s the above sentence applicable to both applications scenarios or only for =
the second one (</span><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">SR-based SFC with integrated NSH service plane)?<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">I=
n the current text, it&#8217;s applicable to both while I&#8217;m not sure =
that it&#8217;s applicable to &#8220;</span><span lang=3D"EN-GB" style=3D"m=
so-ansi-language:EN-GB">NSH-based SFC with SR-based transport plane&#8221;<=
span style=3D"color:#1F497D"> where the transport plane (hence the SR polic=
y) is independent of the service plane.<o:p></o:p></span></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">-=
--<o:p></o:p></span></pre>
<pre>=AB&nbsp;hierarchical SFC [<a href=3D"https://tools.ietf.org/html/rfc8=
459" title=3D"&quot;Hierarchical Service Function Chaining (hSFC)&quot;"><s=
pan style=3D"mso-fareast-font-family:Calibri">RFC8459</span></a>]&nbsp;=BB =
<o:p></o:p></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">D=
oes this document specifically covers hierarchical SFC (hence hierarchical =
SFC &amp; SR)? Is this reference really pertinent?</span><span lang=3D"EN-G=
B" style=3D"mso-ansi-language:EN-GB"><o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">---<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B">=A73<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Section 3 barely speaks about SR. Is this really a SPRING =
document?<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">W=
hen SR is refered to, there is nothing specific to SR.<o:p></o:p></span></p=
re>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">e=
.g. &#8220;</span><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB">Af=
ter removing the outer transport encapsulation, that may or may not be SR-M=
PLS or SRv6,&#8221;<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">If the document is related to the integration of SFC and S=
R, surely the encapsulation is either SR-MPLS or SRv6 (rather than may or m=
ay not be SR).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">May be indicating that in this scenario, there is a priori=
 one SR-policy per SF (while in the next scenario, there is a single SR-pol=
icy for the whole service chain). That
 would talk about SR and may provide a key distinction between both.<o:p></=
o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp; </span>&#8220; At the end of the SR-MPLS path it i=
s necessary to provide an<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>indication to the tail-end that NSH f=
ollows the SR-MPLS label stack.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>There are several ways to achieve thi=
s but its specification is<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>outside the scope of this document.&#=
8221;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">I agree that this is necessary.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">But why is the main<span style=3D"mso-spacerun:yes">&nbsp;
</span>text related to SR-MPLS in this scenario, not specifying the behavio=
ur?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">I<span style=3D"mso-spacerun:yes">&nbsp;
</span>don&#8217;t follow the logic of specifying it for SRv6 (and hence re=
quiring this document to be standard track while otherwise it could be an i=
nformational document describing two scenarios) and not specifying it for S=
R-MPLS.<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">N=
ote that this text is duplicated in =A75.1. And 5.1 is nearly defining one =
proposition, so why not saying that this is a solution? (there is no need t=
o define the encoding for the control plane since this part would likely no=
t be in a spring document) (</span><span lang=3D"EN-GB" style=3D"mso-ansi-l=
anguage:EN-GB">a<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>specific prefix-SID be allocated at e=
ach node for use by the SFC<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span></span>application for this purpose.)=
<o:p></o:p></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">---<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">=A74<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>The benefits of this scheme include:<=
o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB">[&#8230;].<o:p>=
</o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>o<span style=3D"mso-spacerun:yes">&nb=
sp; </span>It simplifies the SFF (i.e., the SR router) by nullifying the<o:=
p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>needs for re-classi=
fication and SR proxy.<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-G=
B"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Regarding the need for reclassification, it seems to me th=
at SR alone can nullify<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi-language:EN-GB">R=
egarding the need for SR proxy, the behaviour described seems very close to=
 a SR proxy &#8220;</span><span lang=3D"EN-GB" style=3D"mso-ansi-language:E=
N-GB">The SFF strips<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>the SR information of the packet, upd=
ates the SR information, and<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>saves it to a cache indexed by the NS=
H SPI.<span style=3D"mso-spacerun:yes">&nbsp; </span>This saved SR<o:p></o:=
p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>information is used to encapsulate an=
d forward the packet(s) coming<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span></span>back from the SF.&nbsp;=BB<o:p=
></o:p></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>o<span style=3D"mso-spacerun:yes">&nb=
sp; </span>It provides a unique and standard way to pass metadata to SFs.<o=
:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>Note that currently=
 there is no solution for SR-MPLS to carry<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>metadata and there =
is no solution to pass metadata to SR-unaware<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>SFs.<o:p></o:p></sp=
an></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">RFC8595 provides another standard way to pass meta data fo=
r SR-MPLS.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><a href=3D"https://tools.ietf.org/html/rfc8595#section-12"=
>https://tools.ietf.org/html/rfc8595#section-12</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">---<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">=A77.2<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB">&#8220;<span st=
yle=3D"mso-spacerun:yes">&nbsp;&nbsp; </span>Encapsulation of NSH following=
 SRv6 may be indicated either by<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>encapsulating NSH in UDP (UDP port TB=
A1) and indicating UDP in the<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>Next Header field of the SRH, or by i=
ndicating an IP protocol number<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>for NSH in the Next Header of the SRH=
. &#8220;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"mso-ansi-language:EN-GB"><o:p>&nbsp;</o:=
p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Why is there a need for two solutions?
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">If so, what are the applicability statement or pro&amp;con=
 of each?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">For interop purpose, which one is mandatory and which one =
is optional?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D;mso-ansi=
-language:EN-GB">--Bruno</span><span lang=3D"EN-GB" style=3D"mso-ansi-langu=
age:EN-GB"><o:p></o:p></span></p>
<pre>______________________________________________________________________=
___________________________________________________<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>Ce message et ses pieces jointes peuvent contenir des informations con=
fidentielles ou privilegiees et ne doivent donc<o:p></o:p></pre>
<pre>pas etre diffuses, exploites ou copies sans autorisation. Si vous avez=
 recu ce message par erreur, veuillez le signaler<o:p></o:p></pre>
<pre>a l'expediteur et le detruire ainsi que les pieces jointes. Les messag=
es electroniques etant susceptibles d'alteration,<o:p></o:p></pre>
<pre>Orange decline toute responsabilite si ce message a ete altere, deform=
e ou falsifie. Merci.<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>This message and its attachments may contain confidential or privilege=
d information that may be protected by law;<o:p></o:p></pre>
<pre>they should not be distributed, used or copied without authorisation.<=
o:p></o:p></pre>
<pre>If you have received this email in error, please notify the sender and=
 delete this message and its attachments.<o:p></o:p></pre>
<pre>As emails may be altered, Orange is not liable for messages that have =
been modified, changed or falsified.<o:p></o:p></pre>
<pre>Thank you.<o:p></o:p></pre>
</div>
<pre>______________________________________________________________________=
___________________________________________________<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>Ce message et ses pieces jointes peuvent contenir des informations con=
fidentielles ou privilegiees et ne doivent donc<o:p></o:p></pre>
<pre>pas etre diffuses, exploites ou copies sans autorisation. Si vous avez=
 recu ce message par erreur, veuillez le signaler<o:p></o:p></pre>
<pre>a l'expediteur et le detruire ainsi que les pieces jointes. Les messag=
es electroniques etant susceptibles d'alteration,<o:p></o:p></pre>
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From: Haoyu Song <haoyu.song@futurewei.com>
To: "bruno.decraene@orange.com" <bruno.decraene@orange.com>, "spring@ietf.org" <spring@ietf.org>, "draft-ietf-spring-nsh-sr@ietf.org" <draft-ietf-spring-nsh-sr@ietf.org>
Thread-Topic: [spring] IPR call for draft-ietf-spring-nsh-sr
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Subject: Re: [spring] IPR call for draft-ietf-spring-nsh-sr
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As a contributor, I'm not aware of any related IPR on this draft.

Thanks,
Haoyu

From: spring <spring-bounces@ietf.org> On Behalf Of bruno.decraene@orange.c=
om
Sent: Tuesday, February 9, 2021 10:06 AM
To: spring@ietf.org; draft-ietf-spring-nsh-sr@ietf.org
Subject: [spring] IPR call for draft-ietf-spring-nsh-sr

Hi authors, contributors, WG

Authors of draft-ietf-spring-nsh-sr have asked for WG last call.
In preparation of the WGLC on draft-ietf-spring-nsh-sr [1], this email star=
ts a poll for IPR.

If you are aware of IPR that applies to draft-ietf-spring-nsh-sr please res=
pond to this email and keep the mailing list in copy.
If you are aware of IPR, please indicate whether it has been disclosed in a=
ccordance to the IETF IPR rules (detailed are described in RFCs 3979, 4879,=
 3669 and 5378).

If you are an *author or contributor* please respond to this email, on the =
SPRING mailing list, regardless of whether or not you're aware of any IPR.
If you are not an author or contributor, please explicitly respond only if =
you're aware of IPR that has not yet been disclosed.

Thanks,
Regards,
Bruno, Jim, Joel

[1] https://tools.ietf.org/html/draft-ietf-spring-nsh-sr


From: spring [mailto:spring-bounces@ietf.org] On Behalf Of bruno.decraene@o=
range.com<mailto:bruno.decraene@orange.com>
Sent: Monday, November 2, 2020 4:26 PM
To: spring@ietf.org<mailto:spring@ietf.org>; draft-ietf-spring-nsh-sr@ietf.=
org<mailto:draft-ietf-spring-nsh-sr@ietf.org>
Subject: [spring] draft-ietf-spring-nsh-sr

Hi authors, WG,

Authors of draft-ietf-spring-nsh-sr have asked for WG last call.
Before initiating it, I've done a review of the draft as document shepherd.
Please find below some comments.

---
It's not crystal clear to me what the scope and the goal of the document ar=
e.

  *   From the abstract, it's an informative description of two application=
s scenarios
  *   From section 5, it's a specification of how to integrate NSH and SR.

     *   Although it's only really specified for SRv6 and not SR-MPLS.

Please clarify to update the document as needed.

----
IdNits reports for 2 errors. [1]
  ** Downref: Normative reference to an Informational RFC: RFC 7665

  *   Probably the only really normative reference is in the security secti=
on. Do you think that a reference to RFC8300 could be used instead (8300 ha=
s a large security consideration section)?
  *   I noticed that 8300 had the same issue. What was the feedback from AD=
 at the time?

  ** There are 4 instances of too long lines in the document, the longest o=
ne
     being 82 characters in excess of 72.
Could you please correct in the next version of the draft?

[1] https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/draft-iet=
f-spring-nsh-sr-03.txt<https://nam11.safelinks.protection.outlook.com/?url=
=3Dhttps%3A%2F%2Ftools.ietf.org%2Fidnits%3Furl%3Dhttps%3A%2F%2Ftools.ietf.o=
rg%2Fid%2Fdraft-ietf-spring-nsh-sr-03.txt&data=3D04%7C01%7Chaoyu.song%40fut=
urewei.com%7C1a8ef920e2b14ea9390f08d8cd2569d0%7C0fee8ff2a3b240189c753a1d559=
1fedc%7C1%7C0%7C637484907887813867%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAw=
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WrYZ9KkF2nKPtli1rOKUBsl1xfwrfRuUCM%3D&reserved=3D0>
-----
Abstract


The abstract feels like the document is informational (e.g., This document =
describes two application scenarios")
But the document asks for an IANA allocation requiring a STD track document=
, so the draft needs to be std track.
Do you think that you could add that the document defines the encapsulation=
 of NSH for SR-MPLS and SRv6?

----
The introduction section seems to be coming from the SFC WG.

  *   May be adding some text about SPRING?
  *   Although this is a personal opinion, I find some sentences a bit mark=
eting oriented. Could you please have a look? E.g.

     *   "The SFC architecture has the merit to not make assumptions"
What about "The SFC architecture does not make assumptions"? This seems mor=
e neutral.
     *   "Among all these approaches, the IETF endorsed a transport-indepen=
dent

-             SFC encapsulation scheme: NSH [RFC8300<https://nam11.safelink=
s.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc83=
00&data=3D04%7C01%7Chaoyu.song%40futurewei.com%7C1a8ef920e2b14ea9390f08d8cd=
2569d0%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637484907887823865%7CUn=
known%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJ=
XVCI6Mn0%3D%7C1000&sdata=3D3aEMeG%2BMWA%2FJRZ7lwAQk9vWmsWWEvN59J9RHL2tdpz0%=
3D&reserved=3D0>]; which is the most mature SFC encapsulation solution. =BB
I'm not sure how much "is the most mature" is true or not. I'm not sure tha=
t the SPRING WG needs to make such statement nor that it is best placed to =
make such statement.
I'm not sure about "the IETF endorsed a transport-independent  SFC encapsul=
ation scheme". Idem with regards to SPRING WG. I'm not sure that this is a =
typical statement in RFC. If so, it feels like the IETF would have equally =
endorsed transport-depending SFC encapsulation scheme. [RFC8595] https://to=
ols.ietf.org/html/rfc8595<https://nam11.safelinks.protection.outlook.com/?u=
rl=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc8595&data=3D04%7C01%7Chaoyu.s=
ong%40futurewei.com%7C1a8ef920e2b14ea9390f08d8cd2569d0%7C0fee8ff2a3b240189c=
753a1d5591fedc%7C1%7C0%7C637484907887823865%7CUnknown%7CTWFpbGZsb3d8eyJWIjo=
iMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3D=
%2BIIesYrFnsSuf3%2BAvJ3A7%2FnDSigFlTSfTRygYVEC7Is%3D&reserved=3D0>

  *   "This design is pragmatic"
Looks like an opinion. Plus I'm not sure that the SPRING WG needs to judge =
the work of the SFC WG.
----
=A72

"The two SR flavors, namely SR-MPLS [RFC8660<https://nam11.safelinks.protec=
tion.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc8660&data=
=3D04%7C01%7Chaoyu.song%40futurewei.com%7C1a8ef920e2b14ea9390f08d8cd2569d0%=
7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637484907887833854%7CUnknown%7=
CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn=
0%3D%7C1000&sdata=3D%2FhYRsZJr20HF6Vu0hjerSc1ECK2gm1s63vzL7gIJUEY%3D&reserv=
ed=3D0>] and SRv6 [RFC8754<https://nam11.safelinks.protection.outlook.com/?=
url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc8754&data=3D04%7C01%7Chaoyu.=
song%40futurewei.com%7C1a8ef920e2b14ea9390f08d8cd2569d0%7C0fee8ff2a3b240189=
c753a1d5591fedc%7C1%7C0%7C637484907887833854%7CUnknown%7CTWFpbGZsb3d8eyJWIj=
oiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=
=3DAlz61HWIhZGvKvcUrDeYsrPdqW7QAv8BpUL6c4IZhfs%3D&reserved=3D0>],"

May be :s/flavors/data plane


"Further considerations such as simplifying classification at intermediate =
SFs"
I'm not sure that simplifying classification is the main point of adding NS=
H. RFC8595 does not refers to this. A priori SR supports a single initial c=
lassification.


----
=A72

"A classifier SHOULD assign an NSH Service Path Identifier (SPI) per

   SR policy so that different traffic flows that use the same NSH

   Service Function Path (SFP) but different SR policy can coexist on

   the same SFP without conflict during SFF processing."



Is the above sentence applicable to both applications scenarios or only for=
 the second one (SR-based SFC with integrated NSH service plane)?

In the current text, it's applicable to both while I'm not sure that it's a=
pplicable to "NSH-based SFC with SR-based transport plane" where the transp=
ort plane (hence the SR policy) is independent of the service plane.

---

=AB hierarchical SFC [RFC8459<https://nam11.safelinks.protection.outlook.co=
m/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc8459&data=3D04%7C01%7Chao=
yu.song%40futurewei.com%7C1a8ef920e2b14ea9390f08d8cd2569d0%7C0fee8ff2a3b240=
189c753a1d5591fedc%7C1%7C0%7C637484907887843849%7CUnknown%7CTWFpbGZsb3d8eyJ=
WIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdat=
a=3DdxZDPwHhCfTQQby3VANqd2Y%2FSxPubT4Z5ZBAAycu%2F5E%3D&reserved=3D0>] =BB

Does this document specifically covers hierarchical SFC (hence hierarchical=
 SFC & SR)? Is this reference really pertinent?


---
=A73
Section 3 barely speaks about SR. Is this really a SPRING document?

When SR is refered to, there is nothing specific to SR.

e.g. "After removing the outer transport encapsulation, that may or may not=
 be SR-MPLS or SRv6,"
If the document is related to the integration of SFC and SR, surely the enc=
apsulation is either SR-MPLS or SRv6 (rather than may or may not be SR).

May be indicating that in this scenario, there is a priori one SR-policy pe=
r SF (while in the next scenario, there is a single SR-policy for the whole=
 service chain). That would talk about SR and may provide a key distinction=
 between both.





  " At the end of the SR-MPLS path it is necessary to provide an

   indication to the tail-end that NSH follows the SR-MPLS label stack.

   There are several ways to achieve this but its specification is

   outside the scope of this document."


I agree that this is necessary.
But why is the main  text related to SR-MPLS in this scenario, not specifyi=
ng the behaviour?
I  don't follow the logic of specifying it for SRv6 (and hence requiring th=
is document to be standard track while otherwise it could be an information=
al document describing two scenarios) and not specifying it for SR-MPLS.

Note that this text is duplicated in =A75.1. And 5.1 is nearly defining one=
 proposition, so why not saying that this is a solution? (there is no need =
to define the encoding for the control plane since this part would likely n=
ot be in a spring document) (a

   specific prefix-SID be allocated at each node for use by the SFC

   application for this purpose.)


---
=A74

   The benefits of this scheme include:



[...].



   o  It simplifies the SFF (i.e., the SR router) by nullifying the

      needs for re-classification and SR proxy.

Regarding the need for reclassification, it seems to me that SR alone can n=
ullify

Regarding the need for SR proxy, the behaviour described seems very close t=
o a SR proxy "The SFF strips

   the SR information of the packet, updates the SR information, and

   saves it to a cache indexed by the NSH SPI.  This saved SR

   information is used to encapsulate and forward the packet(s) coming

   back from the SF. =BB






   o  It provides a unique and standard way to pass metadata to SFs.

      Note that currently there is no solution for SR-MPLS to carry

      metadata and there is no solution to pass metadata to SR-unaware

      SFs.

RFC8595 provides another standard way to pass meta data for SR-MPLS.
https://tools.ietf.org/html/rfc8595#section-12<https://nam11.safelinks.prot=
ection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc8595%23s=
ection-12&data=3D04%7C01%7Chaoyu.song%40futurewei.com%7C1a8ef920e2b14ea9390=
f08d8cd2569d0%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C6374849078878438=
49%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1h=
aWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DNObcZ%2B72bj6RY2ghr1if4VRK%2B0p%2BQSwSJcX=
KVIAOiMQ%3D&reserved=3D0>

---
=A77.2

"   Encapsulation of NSH following SRv6 may be indicated either by

   encapsulating NSH in UDP (UDP port TBA1) and indicating UDP in the

   Next Header field of the SRH, or by indicating an IP protocol number

   for NSH in the Next Header of the SRH. "


Why is there a need for two solutions?
If so, what are the applicability statement or pro&con of each?
For interop purpose, which one is mandatory and which one is optional?

Thanks,
Regards,
--Bruno

___________________________________________________________________________=
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Orange decline toute responsabilite si ce message a ete altere, deforme ou =
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This message and its attachments may contain confidential or privileged inf=
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they should not be distributed, used or copied without authorisation.

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</head>
<body lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72" style=3D"word-wrap:=
break-word">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN">As a cont=
ributor, I&#8217;m not aware of any related IPR on this draft.<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN">Thanks,<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN">Haoyu<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language:ZH-CN"><o:p>&nbs=
p;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"mso-fareast-language:ZH-CN">From:<=
/span></b><span style=3D"mso-fareast-language:ZH-CN"> spring &lt;spring-bou=
nces@ietf.org&gt;
<b>On Behalf Of </b>bruno.decraene@orange.com<br>
<b>Sent:</b> Tuesday, February 9, 2021 10:06 AM<br>
<b>To:</b> spring@ietf.org; draft-ietf-spring-nsh-sr@ietf.org<br>
<b>Subject:</b> [spring] IPR call for draft-ietf-spring-nsh-sr<o:p></o:p></=
span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Hi auth=
ors, contributors, WG<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Authors=
 of draft-ietf-spring-nsh-sr have asked for WG last call.<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">In prep=
aration of the WGLC on draft-ietf-spring-nsh-sr [1], this email starts a po=
ll for IPR.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If you =
are aware of IPR that applies to draft-ietf-spring-nsh-sr please respond to=
 this email and keep the mailing list in copy.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If you =
are aware of IPR, please indicate whether it has been disclosed in accordan=
ce to the IETF IPR rules (detailed are described in RFCs 3979, 4879, 3669 a=
nd 5378).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If you =
are an *author or contributor* please respond to this email, on the SPRING =
mailing list, regardless of whether or not you're aware of any IPR.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If you =
are not an author or contributor, please explicitly respond only if you're =
aware of IPR that has not yet been disclosed.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Thanks,=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Regards=
,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Bruno, =
Jim, Joel<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">[1] </s=
pan><a href=3D"https://tools.ietf.org/html/draft-ietf-spring-nsh-sr"><span =
lang=3D"EN-GB">https://tools.ietf.org/html/draft-ietf-spring-nsh-sr</span><=
/a><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span lang=3D"FR" style=3D"mso-fareast-language:F=
R">From:</span></b><span lang=3D"FR" style=3D"mso-fareast-language:FR"> spr=
ing [</span><a href=3D"mailto:spring-bounces@ietf.org"><span lang=3D"FR" st=
yle=3D"mso-fareast-language:FR">mailto:spring-bounces@ietf.org</span></a><s=
pan lang=3D"FR" style=3D"mso-fareast-language:FR">]
<b>On Behalf Of </b></span><a href=3D"mailto:bruno.decraene@orange.com"><sp=
an lang=3D"FR" style=3D"mso-fareast-language:FR">bruno.decraene@orange.com<=
/span></a><span lang=3D"FR" style=3D"mso-fareast-language:FR"><br>
<b>Sent:</b> Monday, November 2, 2020 4:26 PM<br>
<b>To:</b> </span><a href=3D"mailto:spring@ietf.org"><span lang=3D"FR" styl=
e=3D"mso-fareast-language:FR">spring@ietf.org</span></a><span lang=3D"FR" s=
tyle=3D"mso-fareast-language:FR">;
</span><a href=3D"mailto:draft-ietf-spring-nsh-sr@ietf.org"><span lang=3D"F=
R" style=3D"mso-fareast-language:FR">draft-ietf-spring-nsh-sr@ietf.org</spa=
n></a><span lang=3D"FR" style=3D"mso-fareast-language:FR"><br>
<b>Subject:</b> [spring] draft-ietf-spring-nsh-sr<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"FR"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Hi auth=
ors, WG,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Authors=
 of draft-ietf-spring-nsh-sr have asked for WG last call.<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Before =
initiating it, I&#8217;ve done a review of the draft as document shepherd.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Please =
find below some comments.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">---<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">It&#821=
7;s not crystal clear to me what the scope and the goal of the document are=
.<o:p></o:p></span></p>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoListParagraph" style=3D"color:#1F497D;margin-left:0in;mso-l=
ist:l4 level1 lfo3">
<span lang=3D"EN-GB">From the abstract, it&#8217;s an informative descripti=
on of two applications scenarios<o:p></o:p></span></li><li class=3D"MsoList=
Paragraph" style=3D"color:#1F497D;margin-left:0in;mso-list:l4 level1 lfo3">
<span lang=3D"EN-GB">From section 5, it&#8217;s a specification of how to i=
ntegrate NSH and SR.<o:p></o:p></span></li></ul>
<ul style=3D"margin-top:0in" type=3D"disc">
<ul style=3D"margin-top:0in" type=3D"circle">
<li class=3D"MsoListParagraph" style=3D"color:#1F497D;margin-left:0in;mso-l=
ist:l4 level2 lfo3">
<span lang=3D"EN-GB">Although it&#8217;s only really specified for SRv6 and=
 not SR-MPLS.<o:p></o:p></span></li></ul>
</ul>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Please =
clarify to update the document as needed.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">IdNits =
reports for 2 errors. [1]
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp;** Down=
ref: Normative reference to an Informational RFC: RFC 7665<o:p></o:p></span=
></p>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoListParagraph" style=3D"color:#1F497D;margin-left:0in;mso-l=
ist:l3 level1 lfo7">
<span lang=3D"EN-GB" style=3D"mso-fareast-language:EN-US">Probably the only=
 really normative reference is in the security section. Do you think that a=
 reference to RFC8300 could be used instead (8300 has a large security cons=
ideration section)?<o:p></o:p></span></li><li class=3D"MsoListParagraph" st=
yle=3D"color:#1F497D;margin-left:0in;mso-list:l3 level1 lfo7">
<span lang=3D"EN-GB" style=3D"mso-fareast-language:EN-US">I noticed that 83=
00 had the same issue. What was the feedback from AD at the time?<o:p></o:p=
></span></li></ul>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp; ** There are=
 4 instances of too long lines in the document, the longest one<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp;&nbsp;&=
nbsp; being 82 characters in excess of 72.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:35.4pt"><span lang=3D"EN-GB" st=
yle=3D"color:#1F497D">Could you please correct in the next version of the d=
raft?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">[1] </s=
pan><a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%=
3A%2F%2Ftools.ietf.org%2Fidnits%3Furl%3Dhttps%3A%2F%2Ftools.ietf.org%2Fid%2=
Fdraft-ietf-spring-nsh-sr-03.txt&amp;data=3D04%7C01%7Chaoyu.song%40futurewe=
i.com%7C1a8ef920e2b14ea9390f08d8cd2569d0%7C0fee8ff2a3b240189c753a1d5591fedc=
%7C1%7C0%7C637484907887813867%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiL=
CJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DWlJz3X7dsW=
rYZ9KkF2nKPtli1rOKUBsl1xfwrfRuUCM%3D&amp;reserved=3D0"><span lang=3D"EN-GB"=
>https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/draft-ietf-s=
pring-nsh-sr-03.txt</span></a><span lang=3D"EN-GB" style=3D"color:#1F497D">=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">-----<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Abstrac=
t<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"font-size:11.0pt;font-family:&quot;Calib=
ri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US">The abstract =
feels like the document is informational (e.g.,</span><span lang=3D"EN-GB" =
style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D;mso-farea=
st-language:EN-US"> </span><span lang=3D"EN-GB">This document describes two=
 application scenarios&#8221;)<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">But the=
 document asks for an IANA allocation requiring a STD track document, so th=
e draft needs to be std track.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Do you =
think that you could add that the document defines the encapsulation of NSH=
 for SR-MPLS and SRv6?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">----<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">The int=
roduction section seems to be coming from the SFC WG.<o:p></o:p></span></p>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoListParagraph" style=3D"color:#1F497D;margin-left:0in;mso-l=
ist:l3 level1 lfo7">
<span lang=3D"EN-GB">May be adding some text about SPRING?<o:p></o:p></span=
></li><li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso-list:l3 l=
evel1 lfo7"><span lang=3D"EN-GB" style=3D"color:#1F497D">Although this is a=
 personal opinion, I find some sentences a bit marketing oriented. Could yo=
u please have a look? E.g.
</span><span lang=3D"EN-GB"><o:p></o:p></span></li></ul>
<ul style=3D"margin-top:0in" type=3D"disc">
<ul style=3D"margin-top:0in" type=3D"circle">
<li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso-list:l3 level2 =
lfo7"><span lang=3D"EN-GB" style=3D"color:#1F497D">&#8220;</span><span lang=
=3D"EN-GB">The SFC architecture has the merit to not make
</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Cou=
rier New&quot;">assumptions</span><span lang=3D"EN-GB">&#8221;<br>
<span style=3D"color:#1F497D">What about &#8220;The SFC architecture does n=
ot make assumptions&#8221;? This seems more neutral.</span>
</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Cou=
rier New&quot;"><o:p></o:p></span></li><li class=3D"MsoListParagraph" style=
=3D"margin-left:0in;mso-list:l3 level2 lfo7"><span lang=3D"EN-GB">&#8220;</=
span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">Among all these approaches, the IETF endorsed a transport-ind=
ependent<o:p></o:p></span></li></ul>
</ul>
<pre style=3D"margin-left:.5in;text-indent:-.25in;mso-list:l3 level1 lfo7">=
<![if !supportLists]><span lang=3D"EN-GB" style=3D"font-family:&quot;Calibr=
i&quot;,sans-serif"><span style=3D"mso-list:Ignore">-<span style=3D"font:7.=
0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp; </span></span></span><![endif]><span lang=3D"EN-GB">&nbsp;&nbs=
p;&nbsp;SFC encapsulation scheme: NSH [</span><a href=3D"https://nam11.safe=
links.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Fr=
fc8300&amp;data=3D04%7C01%7Chaoyu.song%40futurewei.com%7C1a8ef920e2b14ea939=
0f08d8cd2569d0%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637484907887823=
865%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1=
haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3D3aEMeG%2BMWA%2FJRZ7lwAQk9vWmsWWEvN59=
J9RHL2tdpz0%3D&amp;reserved=3D0" title=3D"&quot;Network Service Header (NSH=
)&quot;"><span lang=3D"EN-GB">RFC8300</span></a><span lang=3D"EN-GB">]; whi=
ch is the most mature SFC encapsulation solution.&nbsp;=BB<br><span style=
=3D"color:#1F497D">I&#8217;m not sure how much &#8220;is the most mature&#8=
221; is true or not. I&#8217;m not sure that the SPRING WG needs to make su=
ch statement nor that it is best placed to make such statement.<br>I&#8217;=
m not sure about &#8220;</span>the IETF endorsed a transport-independent&nb=
sp; SFC encapsulation scheme&#8221;. <span style=3D"color:#1F497D">Idem wit=
h regards to SPRING WG. I&#8217;m not sure that this is a typical statement=
 in RFC. If so, it feels like the IETF would have equally endorsed transpor=
t-depending SFC encapsulation scheme. [RFC8595] </span></span><a href=3D"ht=
tps://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.iet=
f.org%2Fhtml%2Frfc8595&amp;data=3D04%7C01%7Chaoyu.song%40futurewei.com%7C1a=
8ef920e2b14ea9390f08d8cd2569d0%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7=
C637484907887823865%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2l=
uMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3D%2BIIesYrFnsSuf3%2BA=
vJ3A7%2FnDSigFlTSfTRygYVEC7Is%3D&amp;reserved=3D0"><span lang=3D"EN-GB">htt=
ps://tools.ietf.org/html/rfc8595</span></a><span lang=3D"EN-GB"><o:p></o:p>=
</span></pre>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso-list:l3 level1 =
lfo7"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;">&#8220;This design is pragmatic&#8221;<br>
</span><span lang=3D"EN-GB" style=3D"color:#1F497D">Looks like an opinion. =
Plus I&#8217;m not sure that the SPRING WG needs to judge the work of the S=
FC WG.</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&qu=
ot;Courier New&quot;"><o:p></o:p></span></li></ul>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">=A72<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB">&#8220;The two SR flavors, namely SR-MPLS [</span=
><a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%=
2F%2Ftools.ietf.org%2Fhtml%2Frfc8660&amp;data=3D04%7C01%7Chaoyu.song%40futu=
rewei.com%7C1a8ef920e2b14ea9390f08d8cd2569d0%7C0fee8ff2a3b240189c753a1d5591=
fedc%7C1%7C0%7C637484907887833854%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwM=
DAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3D%2FhYR=
sZJr20HF6Vu0hjerSc1ECK2gm1s63vzL7gIJUEY%3D&amp;reserved=3D0" title=3D"&quot=
;Segment Routing with the MPLS Data Plane&quot;"><span lang=3D"EN-GB">RFC86=
60</span></a><span lang=3D"EN-GB">] and SRv6 [</span><a href=3D"https://nam=
11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fh=
tml%2Frfc8754&amp;data=3D04%7C01%7Chaoyu.song%40futurewei.com%7C1a8ef920e2b=
14ea9390f08d8cd2569d0%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C63748490=
7887833854%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJB=
TiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DAlz61HWIhZGvKvcUrDeYsrPdqW7QA=
v8BpUL6c4IZhfs%3D&amp;reserved=3D0" title=3D"&quot;IPv6 Segment Routing Hea=
der (SRH)&quot;"><span lang=3D"EN-GB">RFC8754</span></a><span lang=3D"EN-GB=
">],&#8221;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">May be :s/flavors/data pl=
ane</span><span lang=3D"EN-GB"><o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-GB">&#8220;Further considerations such as simplifying=
 classification at intermediate SFs&#8221;<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">I&#8217=
;m not sure that simplifying classification is the main point of adding NSH=
. RFC8595 does not refers to this. A priori SR supports a single initial cl=
assification.</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-fam=
ily:&quot;Courier New&quot;"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:1.0in"><span lang=3D"EN-=
GB" style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p>&nb=
sp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">=A72<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB">&#8220;A classifier SHOULD assign an NSH Service =
Path Identifier (SPI) per<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; SR policy so that different traffic =
flows that use the same NSH<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; Service Function Path (SFP) but diff=
erent SR policy can coexist on<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; the same SFP without conflict during=
 SFF processing.&#8221;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">Is the above sentence app=
licable to both applications scenarios or only for the second one (</span><=
span lang=3D"EN-GB">SR-based SFC with integrated NSH service plane)?<o:p></=
o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">In the current text, it&#=
8217;s applicable to both while I&#8217;m not sure that it&#8217;s applicab=
le to &#8220;</span><span lang=3D"EN-GB">NSH-based SFC with SR-based transp=
ort plane&#8221;<span style=3D"color:#1F497D"> where the transport plane (h=
ence the SR policy) is independent of the service plane.<o:p></o:p></span><=
/span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">---<o:p></o:p></span></pr=
e>
<pre><span lang=3D"FR">=AB&nbsp;hierarchical SFC [</span><a href=3D"https:/=
/nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org=
%2Fhtml%2Frfc8459&amp;data=3D04%7C01%7Chaoyu.song%40futurewei.com%7C1a8ef92=
0e2b14ea9390f08d8cd2569d0%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C6374=
84907887843849%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIi=
LCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DdxZDPwHhCfTQQby3VANqd2Y%2=
FSxPubT4Z5ZBAAycu%2F5E%3D&amp;reserved=3D0" title=3D"&quot;Hierarchical Ser=
vice Function Chaining (hSFC)&quot;"><span lang=3D"FR">RFC8459</span></a><s=
pan lang=3D"FR">]&nbsp;=BB <o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">Does this document specif=
ically covers hierarchical SFC (hence hierarchical SFC &amp; SR)? Is this r=
eference really pertinent?</span><span lang=3D"EN-GB"><o:p></o:p></span></p=
re>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">---<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">=A73<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Section=
 3 barely speaks about SR. Is this really a SPRING document?<o:p></o:p></sp=
an></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">When SR is refered to, th=
ere is nothing specific to SR.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">e.g. &#8220;</span><span =
lang=3D"EN-GB">After removing the outer transport encapsulation, that may o=
r may not be SR-MPLS or SRv6,&#8221;<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If the =
document is related to the integration of SFC and SR, surely the encapsulat=
ion is either SR-MPLS or SRv6 (rather than may or may not be SR).<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">May be =
indicating that in this scenario, there is a priori one SR-policy per SF (w=
hile in the next scenario, there is a single SR-policy for the whole servic=
e chain). That would talk about SR and
 may provide a key distinction between both.<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp; &#8220; At the end of the SR-MPLS path it =
is necessary to provide an<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; indication to the tail-end that NSH =
follows the SR-MPLS label stack.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; There are several ways to achieve th=
is but its specification is<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; outside the scope of this document.&=
#8221;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">I agree=
 that this is necessary.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">But why=
 is the main&nbsp; text related to SR-MPLS in this scenario, not specifying=
 the behaviour?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">I&nbsp;=
 don&#8217;t follow the logic of specifying it for SRv6 (and hence requirin=
g this document to be standard track while otherwise it could be an informa=
tional document describing two scenarios) and not
 specifying it for SR-MPLS.<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">Note that this text is du=
plicated in =A75.1. And 5.1 is nearly defining one proposition, so why not =
saying that this is a solution? (there is no need to define the encoding fo=
r the control plane since this part would likely not be in a spring documen=
t) (</span><span lang=3D"EN-GB">a<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; specific prefix-SID be allocated at =
each node for use by the SFC<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; </span><span lang=3D"FR">application=
 for this purpose.)<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">---<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">=A74<o:=
p></o:p></span></p>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; The benefits of this scheme include:=
<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB">[&#8230;].<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; o&nbsp; It simplifies the SFF (i.e.,=
 the SR router) by nullifying the<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; needs for re-class=
ification and SR proxy.<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Regardi=
ng the need for reclassification, it seems to me that SR alone can nullify<=
o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">Regarding the need for SR=
 proxy, the behaviour described seems very close to a SR proxy &#8220;</spa=
n><span lang=3D"EN-GB">The SFF strips<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; the SR information of the packet, up=
dates the SR information, and<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; saves it to a cache indexed by the N=
SH SPI.&nbsp; This saved SR<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; information is used to encapsulate a=
nd forward the packet(s) coming<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; </span><span lang=3D"FR">back from t=
he SF.&nbsp;=BB<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; o&nbsp; It provides a unique and sta=
ndard way to pass metadata to SFs.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Note that currentl=
y there is no solution for SR-MPLS to carry<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; metadata and there=
 is no solution to pass metadata to SR-unaware<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SFs.<o:p></o:p></s=
pan></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">RFC8595=
 provides another standard way to pass meta data for SR-MPLS.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><a href=3D"https://nam11.safelinks.protection.outloo=
k.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc8595%23section-12&amp=
;data=3D04%7C01%7Chaoyu.song%40futurewei.com%7C1a8ef920e2b14ea9390f08d8cd25=
69d0%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637484907887843849%7CUnkn=
own%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXV=
CI6Mn0%3D%7C1000&amp;sdata=3DNObcZ%2B72bj6RY2ghr1if4VRK%2B0p%2BQSwSJcXKVIAO=
iMQ%3D&amp;reserved=3D0"><span lang=3D"EN-GB">https://tools.ietf.org/html/r=
fc8595#section-12</span></a><span lang=3D"EN-GB" style=3D"color:#1F497D"><o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">---<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">=A77.2<=
o:p></o:p></span></p>
<pre><span lang=3D"EN-GB">&#8220;&nbsp;&nbsp; Encapsulation of NSH followin=
g SRv6 may be indicated either by<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; encapsulating NSH in UDP (UDP port T=
BA1) and indicating UDP in the<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; Next Header field of the SRH, or by =
indicating an IP protocol number<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; for NSH in the Next Header of the SR=
H. &#8220;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Why is =
there a need for two solutions?
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If so, =
what are the applicability statement or pro&amp;con of each?<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">For int=
erop purpose, which one is mandatory and which one is optional?<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Thanks,=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Regards=
,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">--Bruno=
</span><span lang=3D"EN-GB"><o:p></o:p></span></p>
<pre><span lang=3D"FR">____________________________________________________=
_____________________________________________________________________<o:p><=
/o:p></span></pre>
<pre><span lang=3D"FR"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"FR">Ce message et ses pieces jointes peuvent contenir de=
s informations confidentielles ou privilegiees et ne doivent donc<o:p></o:p=
></span></pre>
<pre><span lang=3D"FR">pas etre diffuses, exploites ou copies sans autorisa=
tion. Si vous avez recu ce message par erreur, veuillez le signaler<o:p></o=
:p></span></pre>
<pre><span lang=3D"FR">a l'expediteur et le detruire ainsi que les pieces j=
ointes. Les messages electroniques etant susceptibles d'alteration,<o:p></o=
:p></span></pre>
<pre><span lang=3D"FR">Orange decline toute responsabilite si ce message a =
ete altere, deforme ou falsifie. Merci.<o:p></o:p></span></pre>
<pre><span lang=3D"FR"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"FR">This message and its attachments may contain confide=
ntial or privileged information that may be protected by law;<o:p></o:p></s=
pan></pre>
<pre><span lang=3D"FR">they should not be distributed, used or copied witho=
ut authorisation.<o:p></o:p></span></pre>
<pre><span lang=3D"FR">If you have received this email in error, please not=
ify the sender and delete this message and its attachments.<o:p></o:p></spa=
n></pre>
<pre><span lang=3D"FR">As emails may be altered, Orange is not liable for m=
essages that have been modified, changed or falsified.<o:p></o:p></span></p=
re>
<pre><span lang=3D"FR">Thank you.<o:p></o:p></span></pre>
</div>
<pre><span lang=3D"FR">____________________________________________________=
_____________________________________________________________________<o:p><=
/o:p></span></pre>
<pre><span lang=3D"FR"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"FR">Ce message et ses pieces jointes peuvent contenir de=
s informations confidentielles ou privilegiees et ne doivent donc<o:p></o:p=
></span></pre>
<pre><span lang=3D"FR">pas etre diffuses, exploites ou copies sans autorisa=
tion. Si vous avez recu ce message par erreur, veuillez le signaler<o:p></o=
:p></span></pre>
<pre><span lang=3D"FR">a l'expediteur et le detruire ainsi que les pieces j=
ointes. Les messages electroniques etant susceptibles d'alteration,<o:p></o=
:p></span></pre>
<pre><span lang=3D"FR">Orange decline toute responsabilite si ce message a =
ete altere, deforme ou falsifie. Merci.<o:p></o:p></span></pre>
<pre><span lang=3D"FR"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"FR">This message and its attachments may contain confide=
ntial or privileged information that may be protected by law;<o:p></o:p></s=
pan></pre>
<pre><span lang=3D"FR">they should not be distributed, used or copied witho=
ut authorisation.<o:p></o:p></span></pre>
<pre><span lang=3D"FR">If you have received this email in error, please not=
ify the sender and delete this message and its attachments.<o:p></o:p></spa=
n></pre>
<pre><span lang=3D"FR">As emails may be altered, Orange is not liable for m=
essages that have been modified, changed or falsified.<o:p></o:p></span></p=
re>
<pre><span lang=3D"FR">Thank you.<o:p></o:p></span></pre>
</div>
</body>
</html>

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From: Ron Bonica <rbonica@juniper.net>
To: Loa Andersson <loa@pi.nu>, Jeff Tantsura <jefftant.ietf@gmail.com>
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From: "Henderickx, Wim (Nokia - BE/Antwerp)" <wim.henderickx@nokia.com>
To: "Joel M. Halpern" <jmh@joelhalpern.com>, "bruno.decraene@orange.com" <bruno.decraene@orange.com>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: [spring] IPR call for draft-ietf-spring-nsh-sr
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/cQ2Yt4KxWkmQHbvUdPrfqPDOvJA>
Subject: Re: [spring] IPR call for draft-ietf-spring-nsh-sr
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From: Ron Bonica <rbonica@juniper.net>
To: Takuya Miyasaka <ta-miyasaka@kddi-research.jp>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: [spring] FW: New Version Notification for draft-bonica-spring-srv6-end-dtm-01.txt
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Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-srv6-end-dtm-01.txt
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From: Ron Bonica <rbonica@juniper.net>
To: "spring@ietf.org" <spring@ietf.org>
CC: Takuya Miyasaka <ta-miyasaka@kddi-research.jp>, Jeff Tantsura <jefftant.ietf@gmail.com>
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Date: Tue, 9 Feb 2021 21:04:51 +0000
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From: James Guichard <james.n.guichard@futurewei.com>
To: "bruno.decraene@orange.com" <bruno.decraene@orange.com>, "spring@ietf.org" <spring@ietf.org>, "draft-ietf-spring-nsh-sr@ietf.org" <draft-ietf-spring-nsh-sr@ietf.org>
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Subject: Re: [spring] IPR call for draft-ietf-spring-nsh-sr
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Hi Bruno,

As a co-author I am not aware of any undisclosed IPR.

Jim

From: bruno.decraene@orange.com <bruno.decraene@orange.com>
Sent: Tuesday, February 9, 2021 12:06 PM
To: spring@ietf.org; draft-ietf-spring-nsh-sr@ietf.org
Subject: IPR call for draft-ietf-spring-nsh-sr

Hi authors, contributors, WG

Authors of draft-ietf-spring-nsh-sr have asked for WG last call.
In preparation of the WGLC on draft-ietf-spring-nsh-sr [1], this email star=
ts a poll for IPR.

If you are aware of IPR that applies to draft-ietf-spring-nsh-sr please res=
pond to this email and keep the mailing list in copy.
If you are aware of IPR, please indicate whether it has been disclosed in a=
ccordance to the IETF IPR rules (detailed are described in RFCs 3979, 4879,=
 3669 and 5378).

If you are an *author or contributor* please respond to this email, on the =
SPRING mailing list, regardless of whether or not you're aware of any IPR.
If you are not an author or contributor, please explicitly respond only if =
you're aware of IPR that has not yet been disclosed.

Thanks,
Regards,
Bruno, Jim, Joel

[1] https://tools.ietf.org/html/draft-ietf-spring-nsh-sr


From: spring [mailto:spring-bounces@ietf.org] On Behalf Of bruno.decraene@o=
range.com<mailto:bruno.decraene@orange.com>
Sent: Monday, November 2, 2020 4:26 PM
To: spring@ietf.org<mailto:spring@ietf.org>; draft-ietf-spring-nsh-sr@ietf.=
org<mailto:draft-ietf-spring-nsh-sr@ietf.org>
Subject: [spring] draft-ietf-spring-nsh-sr

Hi authors, WG,

Authors of draft-ietf-spring-nsh-sr have asked for WG last call.
Before initiating it, I've done a review of the draft as document shepherd.
Please find below some comments.

---
It's not crystal clear to me what the scope and the goal of the document ar=
e.

  *   From the abstract, it's an informative description of two application=
s scenarios
  *   From section 5, it's a specification of how to integrate NSH and SR.

     *   Although it's only really specified for SRv6 and not SR-MPLS.

Please clarify to update the document as needed.

----
IdNits reports for 2 errors. [1]
  ** Downref: Normative reference to an Informational RFC: RFC 7665

  *   Probably the only really normative reference is in the security secti=
on. Do you think that a reference to RFC8300 could be used instead (8300 ha=
s a large security consideration section)?
  *   I noticed that 8300 had the same issue. What was the feedback from AD=
 at the time?

  ** There are 4 instances of too long lines in the document, the longest o=
ne
     being 82 characters in excess of 72.
Could you please correct in the next version of the draft?

[1] https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/draft-iet=
f-spring-nsh-sr-03.txt<https://nam11.safelinks.protection.outlook.com/?url=
=3Dhttps%3A%2F%2Ftools.ietf.org%2Fidnits%3Furl%3Dhttps%3A%2F%2Ftools.ietf.o=
rg%2Fid%2Fdraft-ietf-spring-nsh-sr-03.txt&data=3D04%7C01%7Cjames.n.guichard=
%40futurewei.com%7Ca55a2664e9b948a7402908d8cd25661c%7C0fee8ff2a3b240189c753=
a1d5591fedc%7C1%7C0%7C637484907809344014%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC=
4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=3DUX%=
2BDd83tp%2Bi15PuHoOJtnePdVn08Hf2vaqyF%2FQo0ZQ0%3D&reserved=3D0>
-----
Abstract


The abstract feels like the document is informational (e.g., This document =
describes two application scenarios")
But the document asks for an IANA allocation requiring a STD track document=
, so the draft needs to be std track.
Do you think that you could add that the document defines the encapsulation=
 of NSH for SR-MPLS and SRv6?

----
The introduction section seems to be coming from the SFC WG.

  *   May be adding some text about SPRING?
  *   Although this is a personal opinion, I find some sentences a bit mark=
eting oriented. Could you please have a look? E.g.

     *   "The SFC architecture has the merit to not make assumptions"
What about "The SFC architecture does not make assumptions"? This seems mor=
e neutral.
     *   "Among all these approaches, the IETF endorsed a transport-indepen=
dent

-             SFC encapsulation scheme: NSH [RFC8300<https://nam11.safelink=
s.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc83=
00&data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7Ca55a2664e9b948a74029=
08d8cd25661c%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C63748490780935400=
8%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1ha=
WwiLCJXVCI6Mn0%3D%7C3000&sdata=3DPwt5OW%2FLoGFTfTKieJGrNrKaJGVaPYC80weeEU4Y=
qf8%3D&reserved=3D0>]; which is the most mature SFC encapsulation solution.=
 =BB
I'm not sure how much "is the most mature" is true or not. I'm not sure tha=
t the SPRING WG needs to make such statement nor that it is best placed to =
make such statement.
I'm not sure about "the IETF endorsed a transport-independent  SFC encapsul=
ation scheme". Idem with regards to SPRING WG. I'm not sure that this is a =
typical statement in RFC. If so, it feels like the IETF would have equally =
endorsed transport-depending SFC encapsulation scheme. [RFC8595] https://to=
ols.ietf.org/html/rfc8595<https://nam11.safelinks.protection.outlook.com/?u=
rl=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc8595&data=3D04%7C01%7Cjames.n=
.guichard%40futurewei.com%7Ca55a2664e9b948a7402908d8cd25661c%7C0fee8ff2a3b2=
40189c753a1d5591fedc%7C1%7C0%7C637484907809354008%7CUnknown%7CTWFpbGZsb3d8e=
yJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sd=
ata=3Dhrgt460%2FM1Gly4n1pUW3WPEBmsGCKeBmy8CVjWassKI%3D&reserved=3D0>

  *   "This design is pragmatic"
Looks like an opinion. Plus I'm not sure that the SPRING WG needs to judge =
the work of the SFC WG.
----
=A72

"The two SR flavors, namely SR-MPLS [RFC8660<https://nam11.safelinks.protec=
tion.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc8660&data=
=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7Ca55a2664e9b948a7402908d8cd2=
5661c%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637484907809364005%7CUnk=
nown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJX=
VCI6Mn0%3D%7C3000&sdata=3DDGIpIE6Fvzi1XQIVTqZUNbwRM%2BoFN0k%2BDnPvwTaHwnc%3=
D&reserved=3D0>] and SRv6 [RFC8754<https://nam11.safelinks.protection.outlo=
ok.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc8754&data=3D04%7C01%=
7Cjames.n.guichard%40futurewei.com%7Ca55a2664e9b948a7402908d8cd25661c%7C0fe=
e8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637484907809364005%7CUnknown%7CTWFp=
bGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%=
7C3000&sdata=3DCpjTFz4RyZr%2Fip7Oi8CfoBxbX1IvutE%2BxqkdPKEsphs%3D&reserved=
=3D0>],"

May be :s/flavors/data plane


"Further considerations such as simplifying classification at intermediate =
SFs"
I'm not sure that simplifying classification is the main point of adding NS=
H. RFC8595 does not refers to this. A priori SR supports a single initial c=
lassification.


----
=A72

"A classifier SHOULD assign an NSH Service Path Identifier (SPI) per

   SR policy so that different traffic flows that use the same NSH

   Service Function Path (SFP) but different SR policy can coexist on

   the same SFP without conflict during SFF processing."



Is the above sentence applicable to both applications scenarios or only for=
 the second one (SR-based SFC with integrated NSH service plane)?

In the current text, it's applicable to both while I'm not sure that it's a=
pplicable to "NSH-based SFC with SR-based transport plane" where the transp=
ort plane (hence the SR policy) is independent of the service plane.

---

=AB hierarchical SFC [RFC8459<https://nam11.safelinks.protection.outlook.co=
m/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc8459&data=3D04%7C01%7Cjam=
es.n.guichard%40futurewei.com%7Ca55a2664e9b948a7402908d8cd25661c%7C0fee8ff2=
a3b240189c753a1d5591fedc%7C1%7C0%7C637484907809373996%7CUnknown%7CTWFpbGZsb=
3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C300=
0&sdata=3Di%2BqeHnmrdEioK5csZj%2BtzILl34n6nt6%2FMF2zV%2BmZynI%3D&reserved=
=3D0>] =BB

Does this document specifically covers hierarchical SFC (hence hierarchical=
 SFC & SR)? Is this reference really pertinent?


---
=A73
Section 3 barely speaks about SR. Is this really a SPRING document?

When SR is refered to, there is nothing specific to SR.

e.g. "After removing the outer transport encapsulation, that may or may not=
 be SR-MPLS or SRv6,"
If the document is related to the integration of SFC and SR, surely the enc=
apsulation is either SR-MPLS or SRv6 (rather than may or may not be SR).

May be indicating that in this scenario, there is a priori one SR-policy pe=
r SF (while in the next scenario, there is a single SR-policy for the whole=
 service chain). That would talk about SR and may provide a key distinction=
 between both.





  " At the end of the SR-MPLS path it is necessary to provide an

   indication to the tail-end that NSH follows the SR-MPLS label stack.

   There are several ways to achieve this but its specification is

   outside the scope of this document."


I agree that this is necessary.
But why is the main  text related to SR-MPLS in this scenario, not specifyi=
ng the behaviour?
I  don't follow the logic of specifying it for SRv6 (and hence requiring th=
is document to be standard track while otherwise it could be an information=
al document describing two scenarios) and not specifying it for SR-MPLS.

Note that this text is duplicated in =A75.1. And 5.1 is nearly defining one=
 proposition, so why not saying that this is a solution? (there is no need =
to define the encoding for the control plane since this part would likely n=
ot be in a spring document) (a

   specific prefix-SID be allocated at each node for use by the SFC

   application for this purpose.)


---
=A74

   The benefits of this scheme include:



[...].



   o  It simplifies the SFF (i.e., the SR router) by nullifying the

      needs for re-classification and SR proxy.

Regarding the need for reclassification, it seems to me that SR alone can n=
ullify

Regarding the need for SR proxy, the behaviour described seems very close t=
o a SR proxy "The SFF strips

   the SR information of the packet, updates the SR information, and

   saves it to a cache indexed by the NSH SPI.  This saved SR

   information is used to encapsulate and forward the packet(s) coming

   back from the SF. =BB






   o  It provides a unique and standard way to pass metadata to SFs.

      Note that currently there is no solution for SR-MPLS to carry

      metadata and there is no solution to pass metadata to SR-unaware

      SFs.

RFC8595 provides another standard way to pass meta data for SR-MPLS.
https://tools.ietf.org/html/rfc8595#section-12<https://nam11.safelinks.prot=
ection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc8595%23s=
ection-12&data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7Ca55a2664e9b94=
8a7402908d8cd25661c%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C6374849078=
09373996%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTi=
I6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=3D8%2FBUk96SLC0S4XisqbsrWWCYLeZpEF1X%=
2BdxBD1Fqz%2Bk%3D&reserved=3D0>

---
=A77.2

"   Encapsulation of NSH following SRv6 may be indicated either by

   encapsulating NSH in UDP (UDP port TBA1) and indicating UDP in the

   Next Header field of the SRH, or by indicating an IP protocol number

   for NSH in the Next Header of the SRH. "


Why is there a need for two solutions?
If so, what are the applicability statement or pro&con of each?
For interop purpose, which one is mandatory and which one is optional?

Thanks,
Regards,
--Bruno

___________________________________________________________________________=
______________________________________________



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______________________________________________



Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc

pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler

a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,

Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.



This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;

they should not be distributed, used or copied without authorisation.

If you have received this email in error, please notify the sender and dele=
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<p class=3D"MsoNormal">Hi Bruno,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">As a co-author I am not aware of any undisclosed IPR=
.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Jim<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> bruno.decraene@orange.com &lt;bruno.dec=
raene@orange.com&gt;
<br>
<b>Sent:</b> Tuesday, February 9, 2021 12:06 PM<br>
<b>To:</b> spring@ietf.org; draft-ietf-spring-nsh-sr@ietf.org<br>
<b>Subject:</b> IPR call for draft-ietf-spring-nsh-sr <o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Hi auth=
ors, contributors, WG<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Authors=
 of draft-ietf-spring-nsh-sr have asked for WG last call.<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">In prep=
aration of the WGLC on draft-ietf-spring-nsh-sr [1], this email starts a po=
ll for IPR.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If you =
are aware of IPR that applies to draft-ietf-spring-nsh-sr please respond to=
 this email and keep the mailing list in copy.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If you =
are aware of IPR, please indicate whether it has been disclosed in accordan=
ce to the IETF IPR rules (detailed are described in RFCs 3979, 4879, 3669 a=
nd 5378).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If you =
are an *author or contributor* please respond to this email, on the SPRING =
mailing list, regardless of whether or not you're aware of any IPR.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If you =
are not an author or contributor, please explicitly respond only if you're =
aware of IPR that has not yet been disclosed.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Thanks,=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Regards=
,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Bruno, =
Jim, Joel<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">[1] <a =
href=3D"https://tools.ietf.org/html/draft-ietf-spring-nsh-sr">
https://tools.ietf.org/html/draft-ietf-spring-nsh-sr</a><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span lang=3D"FR" style=3D"mso-fareast-language:F=
R">From:</span></b><span lang=3D"FR" style=3D"mso-fareast-language:FR"> spr=
ing [<a href=3D"mailto:spring-bounces@ietf.org">mailto:spring-bounces@ietf.=
org</a>]
<b>On Behalf Of </b><a href=3D"mailto:bruno.decraene@orange.com">bruno.decr=
aene@orange.com</a><br>
<b>Sent:</b> Monday, November 2, 2020 4:26 PM<br>
<b>To:</b> <a href=3D"mailto:spring@ietf.org">spring@ietf.org</a>; <a href=
=3D"mailto:draft-ietf-spring-nsh-sr@ietf.org">
draft-ietf-spring-nsh-sr@ietf.org</a><br>
<b>Subject:</b> [spring] draft-ietf-spring-nsh-sr<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"FR"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Hi auth=
ors, WG,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Authors=
 of draft-ietf-spring-nsh-sr have asked for WG last call.<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Before =
initiating it, I&#8217;ve done a review of the draft as document shepherd.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Please =
find below some comments.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">---<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">It&#821=
7;s not crystal clear to me what the scope and the goal of the document are=
.<o:p></o:p></span></p>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoListParagraph" style=3D"color:#1F497D;margin-left:0in;mso-l=
ist:l1 level1 lfo2">
<span lang=3D"EN-GB">From the abstract, it&#8217;s an informative descripti=
on of two applications scenarios<o:p></o:p></span></li><li class=3D"MsoList=
Paragraph" style=3D"color:#1F497D;margin-left:0in;mso-list:l1 level1 lfo2">
<span lang=3D"EN-GB">From section 5, it&#8217;s a specification of how to i=
ntegrate NSH and SR.<o:p></o:p></span></li></ul>
<ul style=3D"margin-top:0in" type=3D"disc">
<ul style=3D"margin-top:0in" type=3D"circle">
<li class=3D"MsoListParagraph" style=3D"color:#1F497D;margin-left:0in;mso-l=
ist:l1 level2 lfo2">
<span lang=3D"EN-GB">Although it&#8217;s only really specified for SRv6 and=
 not SR-MPLS.<o:p></o:p></span></li></ul>
</ul>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Please =
clarify to update the document as needed.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">IdNits =
reports for 2 errors. [1]
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp;** Down=
ref: Normative reference to an Informational RFC: RFC 7665<o:p></o:p></span=
></p>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoListParagraph" style=3D"color:#1F497D;margin-left:0in;mso-l=
ist:l0 level1 lfo4">
<span lang=3D"EN-GB">Probably the only really normative reference is in the=
 security section. Do you think that a reference to RFC8300 could be used i=
nstead (8300 has a large security consideration section)?<o:p></o:p></span>=
</li><li class=3D"MsoListParagraph" style=3D"color:#1F497D;margin-left:0in;=
mso-list:l0 level1 lfo4">
<span lang=3D"EN-GB">I noticed that 8300 had the same issue. What was the f=
eedback from AD at the time?<o:p></o:p></span></li></ul>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp; ** There are=
 4 instances of too long lines in the document, the longest one<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp;&nbsp;&=
nbsp; being 82 characters in excess of 72.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:35.4pt"><span lang=3D"EN-GB" st=
yle=3D"color:#1F497D">Could you please correct in the next version of the d=
raft?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">[1] <a =
href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2=
Ftools.ietf.org%2Fidnits%3Furl%3Dhttps%3A%2F%2Ftools.ietf.org%2Fid%2Fdraft-=
ietf-spring-nsh-sr-03.txt&amp;data=3D04%7C01%7Cjames.n.guichard%40futurewei=
.com%7Ca55a2664e9b948a7402908d8cd25661c%7C0fee8ff2a3b240189c753a1d5591fedc%=
7C1%7C0%7C637484907809344014%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLC=
JQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=3DUX%2BDd83tp=
%2Bi15PuHoOJtnePdVn08Hf2vaqyF%2FQo0ZQ0%3D&amp;reserved=3D0">
https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/draft-ietf-sp=
ring-nsh-sr-03.txt</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">-----<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Abstrac=
t<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"font-size:11.0pt;font-family:&quot;Calib=
ri&quot;,sans-serif;color:#1F497D">The abstract feels like the document is =
informational (e.g.,</span><span lang=3D"EN-GB" style=3D"font-family:&quot;=
Calibri&quot;,sans-serif;color:#1F497D"> </span><span lang=3D"EN-GB">This d=
ocument describes two application scenarios&#8221;)<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">But the=
 document asks for an IANA allocation requiring a STD track document, so th=
e draft needs to be std track.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Do you =
think that you could add that the document defines the encapsulation of NSH=
 for SR-MPLS and SRv6?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">----<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">The int=
roduction section seems to be coming from the SFC WG.<o:p></o:p></span></p>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoListParagraph" style=3D"color:#1F497D;margin-left:0in;mso-l=
ist:l0 level1 lfo4">
<span lang=3D"EN-GB">May be adding some text about SPRING?<o:p></o:p></span=
></li><li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso-list:l0 l=
evel1 lfo4"><span lang=3D"EN-GB" style=3D"color:#1F497D">Although this is a=
 personal opinion, I find some sentences a bit marketing oriented. Could yo=
u please have a look? E.g.
</span><span lang=3D"EN-GB"><o:p></o:p></span></li></ul>
<ul style=3D"margin-top:0in" type=3D"disc">
<ul style=3D"margin-top:0in" type=3D"circle">
<li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso-list:l0 level2 =
lfo4"><span lang=3D"EN-GB" style=3D"color:#1F497D">&#8220;</span><span lang=
=3D"EN-GB">The SFC architecture has the merit to not make
</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Cou=
rier New&quot;">assumptions</span><span lang=3D"EN-GB">&#8221;<br>
<span style=3D"color:#1F497D">What about &#8220;The SFC architecture does n=
ot make assumptions&#8221;? This seems more neutral.</span>
</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Cou=
rier New&quot;"><o:p></o:p></span></li><li class=3D"MsoListParagraph" style=
=3D"margin-left:0in;mso-list:l0 level2 lfo4"><span lang=3D"EN-GB">&#8220;</=
span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Couri=
er New&quot;">Among all these approaches, the IETF endorsed a transport-ind=
ependent<o:p></o:p></span></li></ul>
</ul>
<pre style=3D"margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo4">=
<![if !supportLists]><span lang=3D"EN-GB" style=3D"font-family:&quot;Calibr=
i&quot;,sans-serif"><span style=3D"mso-list:Ignore">-<span style=3D"font:7.=
0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp; </span></span></span><![endif]><span lang=3D"EN-GB">&nbsp;&nbs=
p;&nbsp;SFC encapsulation scheme: NSH [</span><span lang=3D"FR"><a href=3D"=
https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.i=
etf.org%2Fhtml%2Frfc8300&amp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.=
com%7Ca55a2664e9b948a7402908d8cd25661c%7C0fee8ff2a3b240189c753a1d5591fedc%7=
C1%7C0%7C637484907809354008%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJ=
QIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=3DPwt5OW%2FLoG=
FTfTKieJGrNrKaJGVaPYC80weeEU4Yqf8%3D&amp;reserved=3D0" title=3D"&quot;Netwo=
rk Service Header (NSH)&quot;"><span lang=3D"EN-GB">RFC8300</span></a></spa=
n><span lang=3D"EN-GB">]; which is the most mature SFC encapsulation soluti=
on.&nbsp;=BB<br><span style=3D"color:#1F497D">I&#8217;m not sure how much &=
#8220;is the most mature&#8221; is true or not. I&#8217;m not sure that the=
 SPRING WG needs to make such statement nor that it is best placed to make =
such statement.<br>I&#8217;m not sure about &#8220;</span>the IETF endorsed=
 a transport-independent&nbsp; SFC encapsulation scheme&#8221;. <span style=
=3D"color:#1F497D">Idem with regards to SPRING WG. I&#8217;m not sure that =
this is a typical statement in RFC. If so, it feels like the IETF would hav=
e equally endorsed transport-depending SFC encapsulation scheme. [RFC8595] =
<a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2=
F%2Ftools.ietf.org%2Fhtml%2Frfc8595&amp;data=3D04%7C01%7Cjames.n.guichard%4=
0futurewei.com%7Ca55a2664e9b948a7402908d8cd25661c%7C0fee8ff2a3b240189c753a1=
d5591fedc%7C1%7C0%7C637484907809354008%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4w=
LjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=3Dh=
rgt460%2FM1Gly4n1pUW3WPEBmsGCKeBmy8CVjWassKI%3D&amp;reserved=3D0">https://t=
ools.ietf.org/html/rfc8595</a></span><o:p></o:p></span></pre>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso-list:l0 level1 =
lfo4"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;">&#8220;This design is pragmatic&#8221;<br>
</span><span lang=3D"EN-GB" style=3D"color:#1F497D">Looks like an opinion. =
Plus I&#8217;m not sure that the SPRING WG needs to judge the work of the S=
FC WG.</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&qu=
ot;Courier New&quot;"><o:p></o:p></span></li></ul>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">=A72<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB">&#8220;The two SR flavors, namely SR-MPLS [</span=
><span lang=3D"FR"><a href=3D"https://nam11.safelinks.protection.outlook.co=
m/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc8660&amp;data=3D04%7C01%7=
Cjames.n.guichard%40futurewei.com%7Ca55a2664e9b948a7402908d8cd25661c%7C0fee=
8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637484907809364005%7CUnknown%7CTWFpb=
GZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7=
C3000&amp;sdata=3DDGIpIE6Fvzi1XQIVTqZUNbwRM%2BoFN0k%2BDnPvwTaHwnc%3D&amp;re=
served=3D0" title=3D"&quot;Segment Routing with the MPLS Data Plane&quot;">=
<span lang=3D"EN-GB">RFC8660</span></a></span><span lang=3D"EN-GB">] and SR=
v6 [</span><span lang=3D"FR"><a href=3D"https://nam11.safelinks.protection.=
outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc8754&amp;data=
=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7Ca55a2664e9b948a7402908d8cd2=
5661c%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637484907809364005%7CUnk=
nown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJX=
VCI6Mn0%3D%7C3000&amp;sdata=3DCpjTFz4RyZr%2Fip7Oi8CfoBxbX1IvutE%2BxqkdPKEsp=
hs%3D&amp;reserved=3D0" title=3D"&quot;IPv6 Segment Routing Header (SRH)&qu=
ot;"><span lang=3D"EN-GB">RFC8754</span></a></span><span lang=3D"EN-GB">],&=
#8221;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">May be :s/flavors/data pl=
ane</span><span lang=3D"EN-GB"><o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-GB">&#8220;Further considerations such as simplifying=
 classification at intermediate SFs&#8221;<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">I&#8217=
;m not sure that simplifying classification is the main point of adding NSH=
. RFC8595 does not refers to this. A priori SR supports a single initial cl=
assification.</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-fam=
ily:&quot;Courier New&quot;"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:1.0in"><span lang=3D"EN-=
GB" style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p>&nb=
sp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">=A72<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB">&#8220;A classifier SHOULD assign an NSH Service =
Path Identifier (SPI) per<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; SR policy so that different traffic =
flows that use the same NSH<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; Service Function Path (SFP) but diff=
erent SR policy can coexist on<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; the same SFP without conflict during=
 SFF processing.&#8221;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">Is the above sentence app=
licable to both applications scenarios or only for the second one (</span><=
span lang=3D"EN-GB">SR-based SFC with integrated NSH service plane)?<o:p></=
o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">In the current text, it&#=
8217;s applicable to both while I&#8217;m not sure that it&#8217;s applicab=
le to &#8220;</span><span lang=3D"EN-GB">NSH-based SFC with SR-based transp=
ort plane&#8221;<span style=3D"color:#1F497D"> where the transport plane (h=
ence the SR policy) is independent of the service plane.<o:p></o:p></span><=
/span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">---<o:p></o:p></span></pr=
e>
<pre><span lang=3D"FR">=AB&nbsp;hierarchical SFC [<a href=3D"https://nam11.=
safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml=
%2Frfc8459&amp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7Ca55a2664=
e9b948a7402908d8cd25661c%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C63748=
4907809373996%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiL=
CJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=3Di%2BqeHnmrdEioK5csZj%2BtzI=
Ll34n6nt6%2FMF2zV%2BmZynI%3D&amp;reserved=3D0" title=3D"&quot;Hierarchical =
Service Function Chaining (hSFC)&quot;">RFC8459</a>]&nbsp;=BB <o:p></o:p></=
span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">Does this document specif=
ically covers hierarchical SFC (hence hierarchical SFC &amp; SR)? Is this r=
eference really pertinent?</span><span lang=3D"EN-GB"><o:p></o:p></span></p=
re>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">---<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">=A73<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Section=
 3 barely speaks about SR. Is this really a SPRING document?<o:p></o:p></sp=
an></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">When SR is refered to, th=
ere is nothing specific to SR.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">e.g. &#8220;</span><span =
lang=3D"EN-GB">After removing the outer transport encapsulation, that may o=
r may not be SR-MPLS or SRv6,&#8221;<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If the =
document is related to the integration of SFC and SR, surely the encapsulat=
ion is either SR-MPLS or SRv6 (rather than may or may not be SR).<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">May be =
indicating that in this scenario, there is a priori one SR-policy per SF (w=
hile in the next scenario, there is a single SR-policy for the whole servic=
e chain). That would talk about SR and
 may provide a key distinction between both.<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp; &#8220; At the end of the SR-MPLS path it =
is necessary to provide an<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; indication to the tail-end that NSH =
follows the SR-MPLS label stack.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; There are several ways to achieve th=
is but its specification is<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; outside the scope of this document.&=
#8221;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">I agree=
 that this is necessary.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">But why=
 is the main&nbsp; text related to SR-MPLS in this scenario, not specifying=
 the behaviour?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">I&nbsp;=
 don&#8217;t follow the logic of specifying it for SRv6 (and hence requirin=
g this document to be standard track while otherwise it could be an informa=
tional document describing two scenarios) and not
 specifying it for SR-MPLS.<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">Note that this text is du=
plicated in =A75.1. And 5.1 is nearly defining one proposition, so why not =
saying that this is a solution? (there is no need to define the encoding fo=
r the control plane since this part would likely not be in a spring documen=
t) (</span><span lang=3D"EN-GB">a<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; specific prefix-SID be allocated at =
each node for use by the SFC<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; </span><span lang=3D"FR">application=
 for this purpose.)<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">---<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">=A74<o:=
p></o:p></span></p>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; The benefits of this scheme include:=
<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB">[&#8230;].<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; o&nbsp; It simplifies the SFF (i.e.,=
 the SR router) by nullifying the<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; needs for re-class=
ification and SR proxy.<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Regardi=
ng the need for reclassification, it seems to me that SR alone can nullify<=
o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">Regarding the need for SR=
 proxy, the behaviour described seems very close to a SR proxy &#8220;</spa=
n><span lang=3D"EN-GB">The SFF strips<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; the SR information of the packet, up=
dates the SR information, and<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; saves it to a cache indexed by the N=
SH SPI.&nbsp; This saved SR<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; information is used to encapsulate a=
nd forward the packet(s) coming<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; </span><span lang=3D"FR">back from t=
he SF.&nbsp;=BB<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; o&nbsp; It provides a unique and sta=
ndard way to pass metadata to SFs.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Note that currentl=
y there is no solution for SR-MPLS to carry<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; metadata and there=
 is no solution to pass metadata to SR-unaware<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SFs.<o:p></o:p></s=
pan></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">RFC8595=
 provides another standard way to pass meta data for SR-MPLS.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><a href=
=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftoo=
ls.ietf.org%2Fhtml%2Frfc8595%23section-12&amp;data=3D04%7C01%7Cjames.n.guic=
hard%40futurewei.com%7Ca55a2664e9b948a7402908d8cd25661c%7C0fee8ff2a3b240189=
c753a1d5591fedc%7C1%7C0%7C637484907809373996%7CUnknown%7CTWFpbGZsb3d8eyJWIj=
oiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sda=
ta=3D8%2FBUk96SLC0S4XisqbsrWWCYLeZpEF1X%2BdxBD1Fqz%2Bk%3D&amp;reserved=3D0"=
>https://tools.ietf.org/html/rfc8595#section-12</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">---<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">=A77.2<=
o:p></o:p></span></p>
<pre><span lang=3D"EN-GB">&#8220;&nbsp;&nbsp; Encapsulation of NSH followin=
g SRv6 may be indicated either by<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; encapsulating NSH in UDP (UDP port T=
BA1) and indicating UDP in the<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; Next Header field of the SRH, or by =
indicating an IP protocol number<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; for NSH in the Next Header of the SR=
H. &#8220;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Why is =
there a need for two solutions?
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If so, =
what are the applicability statement or pro&amp;con of each?<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">For int=
erop purpose, which one is mandatory and which one is optional?<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Thanks,=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Regards=
,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">--Bruno=
</span><span lang=3D"EN-GB"><o:p></o:p></span></p>
<pre><span lang=3D"FR">____________________________________________________=
_____________________________________________________________________<o:p><=
/o:p></span></pre>
<pre><span lang=3D"FR"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"FR">Ce message et ses pieces jointes peuvent contenir de=
s informations confidentielles ou privilegiees et ne doivent donc<o:p></o:p=
></span></pre>
<pre><span lang=3D"FR">pas etre diffuses, exploites ou copies sans autorisa=
tion. Si vous avez recu ce message par erreur, veuillez le signaler<o:p></o=
:p></span></pre>
<pre><span lang=3D"FR">a l'expediteur et le detruire ainsi que les pieces j=
ointes. Les messages electroniques etant susceptibles d'alteration,<o:p></o=
:p></span></pre>
<pre><span lang=3D"FR">Orange decline toute responsabilite si ce message a =
ete altere, deforme ou falsifie. Merci.<o:p></o:p></span></pre>
<pre><span lang=3D"FR"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"FR">This message and its attachments may contain confide=
ntial or privileged information that may be protected by law;<o:p></o:p></s=
pan></pre>
<pre><span lang=3D"FR">they should not be distributed, used or copied witho=
ut authorisation.<o:p></o:p></span></pre>
<pre><span lang=3D"FR">If you have received this email in error, please not=
ify the sender and delete this message and its attachments.<o:p></o:p></spa=
n></pre>
<pre><span lang=3D"FR">As emails may be altered, Orange is not liable for m=
essages that have been modified, changed or falsified.<o:p></o:p></span></p=
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<pre><span lang=3D"FR">Thank you.<o:p></o:p></span></pre>
</div>
<pre><span lang=3D"FR">____________________________________________________=
_____________________________________________________________________<o:p><=
/o:p></span></pre>
<pre><span lang=3D"FR"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"FR">Ce message et ses pieces jointes peuvent contenir de=
s informations confidentielles ou privilegiees et ne doivent donc<o:p></o:p=
></span></pre>
<pre><span lang=3D"FR">pas etre diffuses, exploites ou copies sans autorisa=
tion. Si vous avez recu ce message par erreur, veuillez le signaler<o:p></o=
:p></span></pre>
<pre><span lang=3D"FR">a l'expediteur et le detruire ainsi que les pieces j=
ointes. Les messages electroniques etant susceptibles d'alteration,<o:p></o=
:p></span></pre>
<pre><span lang=3D"FR">Orange decline toute responsabilite si ce message a =
ete altere, deforme ou falsifie. Merci.<o:p></o:p></span></pre>
<pre><span lang=3D"FR"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"FR">This message and its attachments may contain confide=
ntial or privileged information that may be protected by law;<o:p></o:p></s=
pan></pre>
<pre><span lang=3D"FR">they should not be distributed, used or copied witho=
ut authorisation.<o:p></o:p></span></pre>
<pre><span lang=3D"FR">If you have received this email in error, please not=
ify the sender and delete this message and its attachments.<o:p></o:p></spa=
n></pre>
<pre><span lang=3D"FR">As emails may be altered, Orange is not liable for m=
essages that have been modified, changed or falsified.<o:p></o:p></span></p=
re>
<pre><span lang=3D"FR">Thank you.<o:p></o:p></span></pre>
</div>
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Subject: Re: [spring] IPR call for draft-ietf-spring-nsh-sr
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Hi Bruno,

As a co-author I am not aware of any undisclosed IPR.
Thanks!

Cheers,
Jeff

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<div dir=3D=22auto=22>Hi Bruno,<br />
<br />
As a co-author I am not aware of any undisclosed IPR.<br />
Thanks=21</div>
</div>
<div name=3D=22messageSignatureSection=22><br />
<div class=3D=22match=46ont=22>Cheers,
<div>Jeff</div>
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Date: Tue, 9 Feb 2021 17:00:22 -0800
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: Loa Andersson <loa@pi.nu>, Ron Bonica <rbonica@juniper.net>
Cc: "=?utf-8?Q?spring=40ietf.org?=" <spring@ietf.org>
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Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-srv6-end-dtm-01.txt
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Thanks Ron, couldn=E2=80=99t have explained it better.

Prefix SID (and the prefix associated with it) could be reachable over an=
y interface participating in the topology,=C2=A0=C2=A0depending on that t=
opology structure, with topology changes, outgoing interface might change=
 as well. Hence the outgoing interface is a runtime property of the top S=
ID.

Loa - does this clarify=3F

Cheers,
Jeff
On =46eb 9, 2021, 12:35 PM -0800, Ron Bonica <rbonica=40juniper.net>, wro=
te:
> Loa,
>
> I think that Jeff means to say that =22 A SID instance is associated wi=
th SR-MPLS label stack. A label stack entry can be associated with a next=
 hop. A recursive lookup may be required to derive the next hop from the =
topmost label stack entry.=22
>
> Ron
>
>
>
> Juniper Business Use Only
>
> -----Original Message-----
> =46rom: Loa Andersson <loa=40pi.nu>
> Sent: Monday, =46ebruary 8, 2021 11:51 PM
> To: Jeff Tantsura <jefftant.ietf=40gmail.com>; Ron Bonica <rbonica=40ju=
niper.net>
> Cc: spring=40ietf.org
> Subject: Re: =5Bspring=5D =46W: New Version Notification for draft-boni=
ca-spring-srv6-end-dtm-01.txt
>
> =5BExternal Email. Be cautious of content=5D
>
>
> Jeff,
>
>
> On 08/02/2021 14:51, Jeff Tantsura wrote:
> > Hi Ron,
> >
> > Very useful document, thanks=21
> >
> > Question wrt processing:
> > As described in the draft:
> > =E2=80=9CA SID instance is associated with SR-MPLS label stack and ou=
tgoing interface.=E2=80=9D
> >
> > I=E2=80=99d think that outgoing interface would be recursively resolv=
ed based on the top SID (and could change based on topological semantics)=
.
> > Could you please elaborate=3F
>
> What exactly do yo mean by =22recursively=22=3F
>
> /Loa
> >
> > Thanks=21
> >
> >
> > Cheers,
> > Jeff
> >
> > > On =46eb 7, 2021, at 08:46, Ron Bonica <rbonica=3D40juniper.net=40d=
marc.ietf.org> wrote:
> > >
> > >
> > > Please review and comment
> > >
> > >
> > > Juniper Business Use Only
> > >
> > > > -----Original Message-----
> > > > =46rom: internet-drafts=40ietf.org <internet-drafts=40ietf.org>
> > > > Sent: Sunday, =46ebruary 7, 2021 11:41 AM
> > > > To: Greg Mirsky <gregimirsky=40gmail.com>; Peng Shaofu
> > > > <peng.shaofu=40zte.com.cn>; Ron Bonica <rbonica=40juniper.net>; S=
haofu
> > > > Peng <peng.shaofu=40zte.com.cn>; Shraddha Hegde
> > > > <shraddha=40juniper.net>; EXT- zhang.zheng=40zte.com.cn
> > > > <zhang.zheng=40zte.com.cn>
> > > > Subject: New Version Notification for
> > > > draft-bonica-spring-srv6-end-dtm-01.txt
> > > >
> > > > =5BExternal Email. Be cautious of content=5D
> > > >
> > > >
> > > > A new version of I-D, draft-bonica-spring-srv6-end-dtm-01.txt
> > > > has been successfully submitted by Ron Bonica and posted to the I=
ET=46
> > > > repository.
> > > >
> > > > Name: draft-bonica-spring-srv6-end-dtm
> > > > Revision: 01
> > > > Title: The SRv6 END.DTM Segment Type
> > > > Document date: 2021-02-07
> > > > Group: Individual Submission
> > > > Pages: 7
> > > > URL: https://urldefense.com/v3/=5F=5Fhttps://www.ietf.org/archive=
/id/draft-bonica-spring-srv6-end-dtm-01.txt=5F=5F;=21=21NEt6yMaO-gk=21Xh8=
RUucGY-Dw=5Fx=46wM=5FvU4t=468apyYbe9Xg2bqsA3kb6qY2=46-3qbYI=46rh=468=469y=
bUH5=24
> > > > Status:
> > > > https://urldefense.com/v3/=5F=5Fhttps://datatracker.ietf.org/doc/=
draft-b
> > > > onica-spring-srv6-end-dtm=5F=5F;=21=21NEt6yMaO-gk=21Xh8RUucGY-Dw=5F=
x=46wM=5FvU4t=468ap
> > > > yYbe9Xg2bqsA3kb6qY2=46-3qbYI=46rh=468Oytsvgj=24
> > > > Htmlized: https://urldefense.com/v3/=5F=5Fhttps://datatracker.iet=
f.org/doc/html/draft-bonica-spring-srv6-end-dtm=5F=5F;=21=21NEt6yMaO-gk=21=
Xh8RUucGY-Dw=5Fx=46wM=5FvU4t=468apyYbe9Xg2bqsA3kb6qY2=46-3qbYI=46rh=468=46=
2zaLIO=24
> > > > Htmlized: https://urldefense.com/v3/=5F=5Fhttps://tools.ietf.org/=
html/draft-bonica-spring-srv6-end-dtm-01=5F=5F;=21=21NEt6yMaO-gk=21Xh8RUu=
cGY-Dw=5Fx=46wM=5FvU4t=468apyYbe9Xg2bqsA3kb6qY2=46-3qbYI=46rh=468DZVjUN4=24=

> > > > Diff:
> > > > https://urldefense.com/v3/=5F=5Fhttps://www.ietf.org/rfcdiff=3Fur=
l2=3Ddraft-
> > > > bonica-spring-srv6-end-dtm-01=5F=5F;=21=21NEt6yMaO-gk=21Xh8RUucGY=
-Dw=5Fx=46wM=5FvU4t
> > > > =468apyYbe9Xg2bqsA3kb6qY2=46-3qbYI=46rh=468CJWOgzv=24
> > > >
> > > > Abstract:
> > > > This document describes a new SRv6 segment type, called END.DTM. =
The
> > > > END.DTM segment type supports inter-working between SRv6 and SR-M=
PLS.
> > > > Like any segment type, END.DTM contains a function and arguments.=

> > > > The function causes the processing SRv6 node to remove an SRv6 he=
ader
> > > > and impose an SR-MPLS label stack. The arguments determine MPLS-
> > > > label stack contents.
> > > >
> > > >
> > > >
> > > >
> > > > Please note that it may take a couple of minutes from the time of=

> > > > submission until the htmlized version and diff are available at t=
ools.ietf.org.
> > > >
> > > > The IET=46 Secretariat
> > > >
> > > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F
> > > spring mailing list
> > > spring=40ietf.org
> > > https://urldefense.com/v3/=5F=5Fhttps://www.ietf.org/mailman/listin=
fo/spr
> > > ing=5F=5F;=21=21NEt6yMaO-gk=21Xh8RUucGY-Dw=5Fx=46wM=5FvU4t=468apyYb=
e9Xg2bqsA3kb6qY2=46-3q
> > > bYI=46rh=468PggLsaR=24
> >
> > =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F
> > spring mailing list
> > spring=40ietf.org
> > https://urldefense.com/v3/=5F=5Fhttps://www.ietf.org/mailman/listinfo=
/spri
> > ng=5F=5F;=21=21NEt6yMaO-gk=21Xh8RUucGY-Dw=5Fx=46wM=5FvU4t=468apyYbe9X=
g2bqsA3kb6qY2=46-3qbY
> > I=46rh=468PggLsaR=24
> >
>
> --
>
> Loa Andersson email: loa=40pi.nu
> Senior MPLS Expert loa.pi.nu=40gmail.com
> Bronze Dragon Consulting phone: +46 739 81 21 64

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</head>
<body>
<div name=3D=22messageBodySection=22>
<div dir=3D=22auto=22>Thanks Ron, couldn=E2=80=99t have explained it bett=
er.&=23160;<br />
<br />
Prefix SID (and the prefix associated with it) could be reachable over an=
y interface participating in the topology,&=23160;&=23160;depending on th=
at topology structure, with topology changes, outgoing interface might ch=
ange as well. Hence the outgoing interface is a runtime property of the t=
op SID.<br />
<br />
Loa - does this clarify=3F</div>
</div>
<div name=3D=22messageSignatureSection=22><br />
<div class=3D=22match=46ont=22>Cheers,
<div>Jeff</div>
</div>
</div>
<div name=3D=22messageReplySection=22>On =46eb 9, 2021, 12:35 PM -0800, R=
on Bonica &lt;rbonica=40juniper.net&gt;, wrote:<br />
<blockquote type=3D=22cite=22 style=3D=22border-left-color: grey; border-=
left-width: thin; border-left-style: solid; margin: 5px 5px;padding-left:=
 10px;=22>Loa,<br />
<br />
I think that Jeff means to say that =22 A SID instance is associated with=
 SR-MPLS label stack. A label stack entry can be associated with a next h=
op. A recursive lookup may be required to derive the next hop from the to=
pmost label stack entry.=22<br />
<br />
Ron<br />
<br />
<br />
<br />
Juniper Business Use Only<br />
<br />
-----Original Message-----<br />
=46rom: Loa Andersson &lt;loa=40pi.nu&gt;<br />
Sent: Monday, =46ebruary 8, 2021 11:51 PM<br />
To: Jeff Tantsura &lt;jefftant.ietf=40gmail.com&gt;; Ron Bonica &lt;rboni=
ca=40juniper.net&gt;<br />
Cc: spring=40ietf.org<br />
Subject: Re: =5Bspring=5D =46W: New Version Notification for draft-bonica=
-spring-srv6-end-dtm-01.txt<br />
<br />
=5BExternal Email. Be cautious of content=5D<br />
<br />
<br />
Jeff,<br />
<br />
<br />
On 08/02/2021 14:51, Jeff Tantsura wrote:<br />
<blockquote type=3D=22cite=22>Hi Ron,<br />
<br />
Very useful document, thanks=21<br />
<br />
Question wrt processing:<br />
As described in the draft:<br />
=E2=80=9CA SID instance is associated with SR-MPLS label stack and outgoi=
ng interface.=E2=80=9D<br />
<br />
I=E2=80=99d think that outgoing interface would be recursively resolved b=
ased on the top SID (and could change based on topological semantics).<br=
 />
Could you please elaborate=3F<br /></blockquote>
<br />
What exactly do yo mean by =22recursively=22=3F<br />
<br />
/Loa<br />
<blockquote type=3D=22cite=22><br />
Thanks=21<br />
<br />
<br />
Cheers,<br />
Jeff<br />
<br />
<blockquote type=3D=22cite=22>On =46eb 7, 2021, at 08:46, Ron Bonica &lt;=
rbonica=3D40juniper.net=40dmarc.ietf.org&gt; wrote:<br />
<br />
=EF=BB=BF<br />
Please review and comment<br />
<br />
<br />
Juniper Business Use Only<br />
<br />
<blockquote type=3D=22cite=22>-----Original Message-----<br />
=46rom: internet-drafts=40ietf.org &lt;internet-drafts=40ietf.org&gt;<br =
/>
Sent: Sunday, =46ebruary 7, 2021 11:41 AM<br />
To: Greg Mirsky &lt;gregimirsky=40gmail.com&gt;; Peng Shaofu<br />
&lt;peng.shaofu=40zte.com.cn&gt;; Ron Bonica &lt;rbonica=40juniper.net&gt=
;; Shaofu<br />
Peng &lt;peng.shaofu=40zte.com.cn&gt;; Shraddha Hegde<br />
&lt;shraddha=40juniper.net&gt;; EXT- zhang.zheng=40zte.com.cn<br />
&lt;zhang.zheng=40zte.com.cn&gt;<br />
Subject: New Version Notification for<br />
draft-bonica-spring-srv6-end-dtm-01.txt<br />
<br />
=5BExternal Email. Be cautious of content=5D<br />
<br />
<br />
A new version of I-D, draft-bonica-spring-srv6-end-dtm-01.txt<br />
has been successfully submitted by Ron Bonica and posted to the IET=46<br=
 />
repository.<br />
<br />
Name: draft-bonica-spring-srv6-end-dtm<br />
Revision: 01<br />
Title: The SRv6 END.DTM Segment Type<br />
Document date: 2021-02-07<br />
Group: Individual Submission<br />
Pages: 7<br />
URL: https://urldefense.com/v3/=5F=5Fhttps://www.ietf.org/archive/id/draf=
t-bonica-spring-srv6-end-dtm-01.txt=5F=5F;=21=21NEt6yMaO-gk=21Xh8RUucGY-D=
w=5Fx=46wM=5FvU4t=468apyYbe9Xg2bqsA3kb6qY2=46-3qbYI=46rh=468=469ybUH5=24<=
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Status:<br />
https://urldefense.com/v3/=5F=5Fhttps://datatracker.ietf.org/doc/draft-b<=
br />
onica-spring-srv6-end-dtm=5F=5F;=21=21NEt6yMaO-gk=21Xh8RUucGY-Dw=5Fx=46wM=
=5FvU4t=468ap<br />
yYbe9Xg2bqsA3kb6qY2=46-3qbYI=46rh=468Oytsvgj=24<br />
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c/html/draft-bonica-spring-srv6-end-dtm=5F=5F;=21=21NEt6yMaO-gk=21Xh8RUuc=
GY-Dw=5Fx=46wM=5FvU4t=468apyYbe9Xg2bqsA3kb6qY2=46-3qbYI=46rh=468=462zaLIO=
=24<br />
Htmlized: https://urldefense.com/v3/=5F=5Fhttps://tools.ietf.org/html/dra=
ft-bonica-spring-srv6-end-dtm-01=5F=5F;=21=21NEt6yMaO-gk=21Xh8RUucGY-Dw=5F=
x=46wM=5FvU4t=468apyYbe9Xg2bqsA3kb6qY2=46-3qbYI=46rh=468DZVjUN4=24<br />
Diff:<br />
https://urldefense.com/v3/=5F=5Fhttps://www.ietf.org/rfcdiff=3Furl2=3Ddra=
ft-<br />
bonica-spring-srv6-end-dtm-01=5F=5F;=21=21NEt6yMaO-gk=21Xh8RUucGY-Dw=5Fx=46=
wM=5FvU4t<br />
=468apyYbe9Xg2bqsA3kb6qY2=46-3qbYI=46rh=468CJWOgzv=24<br />
<br />
Abstract:<br />
This document describes a new SRv6 segment type, called END.DTM. The<br /=
>
END.DTM segment type supports inter-working between SRv6 and SR-MPLS.<br =
/>
Like any segment type, END.DTM contains a function and arguments.<br />
The function causes the processing SRv6 node to remove an SRv6 header<br =
/>
and impose an SR-MPLS label stack. The arguments determine MPLS-<br />
label stack contents.<br />
<br />
<br />
<br />
<br />
Please note that it may take a couple of minutes from the time of<br />
submission until the htmlized version and diff are available at tools.iet=
f.org.<br />
<br />
The IET=46 Secretariat<br />
<br /></blockquote>
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F<br />
spring mailing list<br />
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<br />
ing=5F=5F;=21=21NEt6yMaO-gk=21Xh8RUucGY-Dw=5Fx=46wM=5FvU4t=468apyYbe9Xg2b=
qsA3kb6qY2=46-3q<br />
bYI=46rh=468PggLsaR=24<br /></blockquote>
<br />
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F<br />
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i<br />
ng=5F=5F;=21=21NEt6yMaO-gk=21Xh8RUucGY-Dw=5Fx=46wM=5FvU4t=468apyYbe9Xg2bq=
sA3kb6qY2=46-3qbY<br />
I=46rh=468PggLsaR=24<br />
<br /></blockquote>
<br />
--<br />
<br />
Loa Andersson email: loa=40pi.nu<br />
Senior MPLS Expert loa.pi.nu=40gmail.com<br />
Bronze Dragon Consulting phone: +46 739 81 21 64<br /></blockquote>
</div>
</body>
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--6023302b_41a7c4c9_3d3--


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From: "Chengli (Cheng Li)" <c.l@huawei.com>
To: "bruno.decraene@orange.com" <bruno.decraene@orange.com>, "spring@ietf.org" <spring@ietf.org>, "draft-ietf-spring-nsh-sr@ietf.org" <draft-ietf-spring-nsh-sr@ietf.org>
Thread-Topic: [spring] IPR call for draft-ietf-spring-nsh-sr
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Date: Wed, 10 Feb 2021 01:28:51 +0000
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I am aware of an IPR that has been disclosed in the system.

Thanks,
Cheng


From: spring [mailto:spring-bounces@ietf.org] On Behalf Of bruno.decraene@o=
range.com
Sent: Wednesday, February 10, 2021 2:06 AM
To: spring@ietf.org; draft-ietf-spring-nsh-sr@ietf.org
Subject: [spring] IPR call for draft-ietf-spring-nsh-sr

Hi authors, contributors, WG

Authors of draft-ietf-spring-nsh-sr have asked for WG last call.
In preparation of the WGLC on draft-ietf-spring-nsh-sr [1], this email star=
ts a poll for IPR.

If you are aware of IPR that applies to draft-ietf-spring-nsh-sr please res=
pond to this email and keep the mailing list in copy.
If you are aware of IPR, please indicate whether it has been disclosed in a=
ccordance to the IETF IPR rules (detailed are described in RFCs 3979, 4879,=
 3669 and 5378).

If you are an *author or contributor* please respond to this email, on the =
SPRING mailing list, regardless of whether or not you're aware of any IPR.
If you are not an author or contributor, please explicitly respond only if =
you're aware of IPR that has not yet been disclosed.

Thanks,
Regards,
Bruno, Jim, Joel

[1] https://tools.ietf.org/html/draft-ietf-spring-nsh-sr


From: spring [mailto:spring-bounces@ietf.org] On Behalf Of bruno.decraene@o=
range.com<mailto:bruno.decraene@orange.com>
Sent: Monday, November 2, 2020 4:26 PM
To: spring@ietf.org<mailto:spring@ietf.org>; draft-ietf-spring-nsh-sr@ietf.=
org<mailto:draft-ietf-spring-nsh-sr@ietf.org>
Subject: [spring] draft-ietf-spring-nsh-sr

Hi authors, WG,

Authors of draft-ietf-spring-nsh-sr have asked for WG last call.
Before initiating it, I've done a review of the draft as document shepherd.
Please find below some comments.

---
It's not crystal clear to me what the scope and the goal of the document ar=
e.

-          From the abstract, it's an informative description of two applic=
ations scenarios

-          From section 5, it's a specification of how to integrate NSH and=
 SR.

o   Although it's only really specified for SRv6 and not SR-MPLS.

Please clarify to update the document as needed.

----
IdNits reports for 2 errors. [1]
  ** Downref: Normative reference to an Informational RFC: RFC 7665

-          Probably the only really normative reference is in the security =
section. Do you think that a reference to RFC8300 could be used instead (83=
00 has a large security consideration section)?

-          I noticed that 8300 had the same issue. What was the feedback fr=
om AD at the time?

  ** There are 4 instances of too long lines in the document, the longest o=
ne
     being 82 characters in excess of 72.
Could you please correct in the next version of the draft?

[1] https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/draft-iet=
f-spring-nsh-sr-03.txt
-----
Abstract


The abstract feels like the document is informational (e.g., This document =
describes two application scenarios")
But the document asks for an IANA allocation requiring a STD track document=
, so the draft needs to be std track.
Do you think that you could add that the document defines the encapsulation=
 of NSH for SR-MPLS and SRv6?

----
The introduction section seems to be coming from the SFC WG.

-          May be adding some text about SPRING?

-          Although this is a personal opinion, I find some sentences a bit=
 marketing oriented. Could you please have a look? E.g.

o    "The SFC architecture has the merit to not make assumptions"
What about "The SFC architecture does not make assumptions"? This seems mor=
e neutral.

o    "Among all these approaches, the IETF endorsed a transport-independent

-             SFC encapsulation scheme: NSH [RFC8300<https://tools.ietf.org=
/html/rfc8300>]; which is the most mature SFC encapsulation solution. =BB
I'm not sure how much "is the most mature" is true or not. I'm not sure tha=
t the SPRING WG needs to make such statement nor that it is best placed to =
make such statement.
I'm not sure about "the IETF endorsed a transport-independent  SFC encapsul=
ation scheme". Idem with regards to SPRING WG. I'm not sure that this is a =
typical statement in RFC. If so, it feels like the IETF would have equally =
endorsed transport-depending SFC encapsulation scheme. [RFC8595] https://to=
ols.ietf.org/html/rfc8595

-          "This design is pragmatic"
Looks like an opinion. Plus I'm not sure that the SPRING WG needs to judge =
the work of the SFC WG.
----
=A72

"The two SR flavors, namely SR-MPLS [RFC8660<https://tools.ietf.org/html/rf=
c8660>] and SRv6 [RFC8754<https://tools.ietf.org/html/rfc8754>],"

May be :s/flavors/data plane


"Further considerations such as simplifying classification at intermediate =
SFs"
I'm not sure that simplifying classification is the main point of adding NS=
H. RFC8595 does not refers to this. A priori SR supports a single initial c=
lassification.


----
=A72

"A classifier SHOULD assign an NSH Service Path Identifier (SPI) per

   SR policy so that different traffic flows that use the same NSH

   Service Function Path (SFP) but different SR policy can coexist on

   the same SFP without conflict during SFF processing."



Is the above sentence applicable to both applications scenarios or only for=
 the second one (SR-based SFC with integrated NSH service plane)?

In the current text, it's applicable to both while I'm not sure that it's a=
pplicable to "NSH-based SFC with SR-based transport plane" where the transp=
ort plane (hence the SR policy) is independent of the service plane.

---

=AB hierarchical SFC [RFC8459<https://tools.ietf.org/html/rfc8459>] =BB

Does this document specifically covers hierarchical SFC (hence hierarchical=
 SFC & SR)? Is this reference really pertinent?


---
=A73
Section 3 barely speaks about SR. Is this really a SPRING document?

When SR is refered to, there is nothing specific to SR.

e.g. "After removing the outer transport encapsulation, that may or may not=
 be SR-MPLS or SRv6,"
If the document is related to the integration of SFC and SR, surely the enc=
apsulation is either SR-MPLS or SRv6 (rather than may or may not be SR).

May be indicating that in this scenario, there is a priori one SR-policy pe=
r SF (while in the next scenario, there is a single SR-policy for the whole=
 service chain). That would talk about SR and may provide a key distinction=
 between both.





  " At the end of the SR-MPLS path it is necessary to provide an

   indication to the tail-end that NSH follows the SR-MPLS label stack.

   There are several ways to achieve this but its specification is

   outside the scope of this document."


I agree that this is necessary.
But why is the main  text related to SR-MPLS in this scenario, not specifyi=
ng the behaviour?
I  don't follow the logic of specifying it for SRv6 (and hence requiring th=
is document to be standard track while otherwise it could be an information=
al document describing two scenarios) and not specifying it for SR-MPLS.

Note that this text is duplicated in =A75.1. And 5.1 is nearly defining one=
 proposition, so why not saying that this is a solution? (there is no need =
to define the encoding for the control plane since this part would likely n=
ot be in a spring document) (a

   specific prefix-SID be allocated at each node for use by the SFC

   application for this purpose.)


---
=A74

   The benefits of this scheme include:



[...].



   o  It simplifies the SFF (i.e., the SR router) by nullifying the

      needs for re-classification and SR proxy.

Regarding the need for reclassification, it seems to me that SR alone can n=
ullify

Regarding the need for SR proxy, the behaviour described seems very close t=
o a SR proxy "The SFF strips

   the SR information of the packet, updates the SR information, and

   saves it to a cache indexed by the NSH SPI.  This saved SR

   information is used to encapsulate and forward the packet(s) coming

   back from the SF. =BB






   o  It provides a unique and standard way to pass metadata to SFs.

      Note that currently there is no solution for SR-MPLS to carry

      metadata and there is no solution to pass metadata to SR-unaware

      SFs.

RFC8595 provides another standard way to pass meta data for SR-MPLS.
https://tools.ietf.org/html/rfc8595#section-12

---
=A77.2

"   Encapsulation of NSH following SRv6 may be indicated either by

   encapsulating NSH in UDP (UDP port TBA1) and indicating UDP in the

   Next Header field of the SRH, or by indicating an IP protocol number

   for NSH in the Next Header of the SRH. "


Why is there a need for two solutions?
If so, what are the applicability statement or pro&con of each?
For interop purpose, which one is mandatory and which one is optional?

Thanks,
Regards,
--Bruno

___________________________________________________________________________=
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Orange decline toute responsabilite si ce message a ete altere, deforme ou =
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</head>
<body lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN">I am aware of an IPR that has been
</span><span lang=3D"EN-GB" style=3D"color:#1F497D">disclosed in the system=
.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Thanks,=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Cheng<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D;mso-fareast-language:ZH=
-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"mso-fareast-language:ZH-CN">From:<=
/span></b><span style=3D"mso-fareast-language:ZH-CN"> spring [mailto:spring=
-bounces@ietf.org]
<b>On Behalf Of </b>bruno.decraene@orange.com<br>
<b>Sent:</b> Wednesday, February 10, 2021 2:06 AM<br>
<b>To:</b> spring@ietf.org; draft-ietf-spring-nsh-sr@ietf.org<br>
<b>Subject:</b> [spring] IPR call for draft-ietf-spring-nsh-sr<o:p></o:p></=
span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Hi auth=
ors, contributors, WG<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Authors=
 of draft-ietf-spring-nsh-sr have asked for WG last call.<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">In prep=
aration of the WGLC on draft-ietf-spring-nsh-sr [1], this email starts a po=
ll for IPR.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If you =
are aware of IPR that applies to draft-ietf-spring-nsh-sr please respond to=
 this email and keep the mailing list in copy.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If you =
are aware of IPR, please indicate whether it has been disclosed in accordan=
ce to the IETF IPR rules (detailed are described in RFCs 3979, 4879, 3669 a=
nd 5378).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If you =
are an *author or contributor* please respond to this email, on the SPRING =
mailing list, regardless of whether or not you're aware of any IPR.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If you =
are not an author or contributor, please explicitly respond only if you're =
aware of IPR that has not yet been disclosed.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Thanks,=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Regards=
,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Bruno, =
Jim, Joel<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">[1] <a =
href=3D"https://tools.ietf.org/html/draft-ietf-spring-nsh-sr">
https://tools.ietf.org/html/draft-ietf-spring-nsh-sr</a><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"FR" style=3D"mso-fareast-language:F=
R">From:</span></b><span lang=3D"FR" style=3D"mso-fareast-language:FR"> spr=
ing [<a href=3D"mailto:spring-bounces@ietf.org">mailto:spring-bounces@ietf.=
org</a>]
<b>On Behalf Of </b><a href=3D"mailto:bruno.decraene@orange.com">bruno.decr=
aene@orange.com</a><br>
<b>Sent:</b> Monday, November 2, 2020 4:26 PM<br>
<b>To:</b> <a href=3D"mailto:spring@ietf.org">spring@ietf.org</a>; <a href=
=3D"mailto:draft-ietf-spring-nsh-sr@ietf.org">
draft-ietf-spring-nsh-sr@ietf.org</a><br>
<b>Subject:</b> [spring] draft-ietf-spring-nsh-sr<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"FR"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Hi auth=
ors, WG,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Authors=
 of draft-ietf-spring-nsh-sr have asked for WG last call.<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Before =
initiating it, I&#8217;ve done a review of the draft as document shepherd.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Please =
find below some comments.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">---<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">It&#821=
7;s not crystal clear to me what the scope and the goal of the document are=
.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D">=
<span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New =
Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D"=
>From the abstract, it&#8217;s an informative description of two applicatio=
ns scenarios<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D">=
<span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New =
Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D"=
>From section 5, it&#8217;s a specification of how to integrate NSH and SR.=
<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l1 level2 lfo2">
<![if !supportLists]><span lang=3D"EN-GB" style=3D"font-family:&quot;Courie=
r New&quot;;color:#1F497D"><span style=3D"mso-list:Ignore">o<span style=3D"=
font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D"=
>Although it&#8217;s only really specified for SRv6 and not SR-MPLS.<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Please =
clarify to update the document as needed.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">IdNits =
reports for 2 errors. [1]
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp;** Down=
ref: Normative reference to an Informational RFC: RFC 7665<o:p></o:p></span=
></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D;m=
so-fareast-language:EN-US"><span style=3D"mso-list:Ignore">-<span style=3D"=
font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D;=
mso-fareast-language:EN-US">Probably the only really normative reference is=
 in the security section. Do you think that a reference to RFC8300 could be=
 used instead (8300 has a large security
 consideration section)?<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D;m=
so-fareast-language:EN-US"><span style=3D"mso-list:Ignore">-<span style=3D"=
font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D;=
mso-fareast-language:EN-US">I noticed that 8300 had the same issue. What wa=
s the feedback from AD at the time?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp; ** There are=
 4 instances of too long lines in the document, the longest one<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp;&nbsp;&=
nbsp; being 82 characters in excess of 72.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:35.4pt"><span lang=3D"EN-GB" st=
yle=3D"color:#1F497D">Could you please correct in the next version of the d=
raft?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">[1] <a =
href=3D"https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/draft=
-ietf-spring-nsh-sr-03.txt">
https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/draft-ietf-sp=
ring-nsh-sr-03.txt</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">-----<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Abstrac=
t<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"font-size:11.0pt;font-family:&quot;Calib=
ri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US">The abstract =
feels like the document is informational (e.g.,</span><span lang=3D"EN-GB" =
style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D;mso-farea=
st-language:EN-US"> </span><span lang=3D"EN-GB">This document describes two=
 application scenarios&#8221;)<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">But the=
 document asks for an IANA allocation requiring a STD track document, so th=
e draft needs to be std track.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Do you =
think that you could add that the document defines the encapsulation of NSH=
 for SR-MPLS and SRv6?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">----<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">The int=
roduction section seems to be coming from the SFC WG.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D">=
<span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New =
Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D"=
>May be adding some text about SPRING?<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB"><span style=3D"mso-list:=
Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D"=
>Although this is a personal opinion, I find some sentences a bit marketing=
 oriented. Could you please have a look? E.g.
</span><span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo4">
<![if !supportLists]><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-fa=
mily:&quot;Courier New&quot;"><span style=3D"mso-list:Ignore">o<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D"=
>&#8220;</span><span lang=3D"EN-GB">The SFC architecture has the merit to n=
ot make
</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Cou=
rier New&quot;">assumptions</span><span lang=3D"EN-GB">&#8221;<br>
<span style=3D"color:#1F497D">What about &#8220;The SFC architecture does n=
ot make assumptions&#8221;? This seems more neutral.</span>
</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Cou=
rier New&quot;"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo4">
<![if !supportLists]><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-fa=
mily:&quot;Courier New&quot;"><span style=3D"mso-list:Ignore">o<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB">&#8220;</span><span lan=
g=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">=
Among all these approaches, the IETF endorsed a transport-independent<o:p><=
/o:p></span></p>
<pre style=3D"margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo=
4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"font-family:&quot;Cal=
ibri&quot;,sans-serif"><span style=3D"mso-list:Ignore">-<span style=3D"font=
:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp; </span></span></span><![endif]><span lang=3D"EN-GB">&nbsp;&=
nbsp;&nbsp;SFC encapsulation scheme: NSH [</span><span lang=3D"FR"><a href=
=3D"https://tools.ietf.org/html/rfc8300" title=3D"&quot;Network Service Hea=
der (NSH)&quot;"><span lang=3D"EN-GB">RFC8300</span></a></span><span lang=
=3D"EN-GB">]; which is the most mature SFC encapsulation solution.&nbsp;=BB=
<br><span style=3D"color:#1F497D">I&#8217;m not sure how much &#8220;is the=
 most mature&#8221; is true or not. I&#8217;m not sure that the SPRING WG n=
eeds to make such statement nor that it is best placed to make such stateme=
nt.<br>I&#8217;m not sure about &#8220;</span>the IETF endorsed a transport=
-independent&nbsp; SFC encapsulation scheme&#8221;. <span style=3D"color:#1=
F497D">Idem with regards to SPRING WG. I&#8217;m not sure that this is a ty=
pical statement in RFC. If so, it feels like the IETF would have equally en=
dorsed transport-depending SFC encapsulation scheme. [RFC8595] <a href=3D"h=
ttps://tools.ietf.org/html/rfc8595">https://tools.ietf.org/html/rfc8595</a>=
</span><o:p></o:p></span></pre>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"font-size:10.0p=
t"><span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &quot;Times N=
ew Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"font-size:10.0=
pt;font-family:&quot;Courier New&quot;">&#8220;This design is pragmatic&#82=
21;<br>
</span><span lang=3D"EN-GB" style=3D"color:#1F497D">Looks like an opinion. =
Plus I&#8217;m not sure that the SPRING WG needs to judge the work of the S=
FC WG.</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&qu=
ot;Courier New&quot;"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">=A72<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB">&#8220;The two SR flavors, namely SR-MPLS [</span=
><span lang=3D"FR"><a href=3D"https://tools.ietf.org/html/rfc8660" title=3D=
"&quot;Segment Routing with the MPLS Data Plane&quot;"><span lang=3D"EN-GB"=
>RFC8660</span></a></span><span lang=3D"EN-GB">] and SRv6 [</span><span lan=
g=3D"FR"><a href=3D"https://tools.ietf.org/html/rfc8754" title=3D"&quot;IPv=
6 Segment Routing Header (SRH)&quot;"><span lang=3D"EN-GB">RFC8754</span></=
a></span><span lang=3D"EN-GB">],&#8221;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">May be :s/flavors/data pl=
ane</span><span lang=3D"EN-GB"><o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-GB">&#8220;Further considerations such as simplifying=
 classification at intermediate SFs&#8221;<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">I&#8217=
;m not sure that simplifying classification is the main point of adding NSH=
. RFC8595 does not refers to this. A priori SR supports a single initial cl=
assification.</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-fam=
ily:&quot;Courier New&quot;"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt"><span lang=3D"EN=
-GB" style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">=A72<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB">&#8220;A classifier SHOULD assign an NSH Service =
Path Identifier (SPI) per<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; SR policy so that different traffic =
flows that use the same NSH<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; Service Function Path (SFP) but diff=
erent SR policy can coexist on<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; the same SFP without conflict during=
 SFF processing.&#8221;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">Is the above sentence app=
licable to both applications scenarios or only for the second one (</span><=
span lang=3D"EN-GB">SR-based SFC with integrated NSH service plane)?<o:p></=
o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">In the current text, it&#=
8217;s applicable to both while I&#8217;m not sure that it&#8217;s applicab=
le to &#8220;</span><span lang=3D"EN-GB">NSH-based SFC with SR-based transp=
ort plane&#8221;<span style=3D"color:#1F497D"> where the transport plane (h=
ence the SR policy) is independent of the service plane.<o:p></o:p></span><=
/span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">---<o:p></o:p></span></pr=
e>
<pre><span lang=3D"FR">=AB&nbsp;hierarchical SFC [<a href=3D"https://tools.=
ietf.org/html/rfc8459" title=3D"&quot;Hierarchical Service Function Chainin=
g (hSFC)&quot;">RFC8459</a>]&nbsp;=BB <o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">Does this document specif=
ically covers hierarchical SFC (hence hierarchical SFC &amp; SR)? Is this r=
eference really pertinent?</span><span lang=3D"EN-GB"><o:p></o:p></span></p=
re>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">---<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">=A73<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Section=
 3 barely speaks about SR. Is this really a SPRING document?<o:p></o:p></sp=
an></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">When SR is refered to, th=
ere is nothing specific to SR.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">e.g. &#8220;</span><span =
lang=3D"EN-GB">After removing the outer transport encapsulation, that may o=
r may not be SR-MPLS or SRv6,&#8221;<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If the =
document is related to the integration of SFC and SR, surely the encapsulat=
ion is either SR-MPLS or SRv6 (rather than may or may not be SR).<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">May be =
indicating that in this scenario, there is a priori one SR-policy per SF (w=
hile in the next scenario, there is a single SR-policy for the whole servic=
e chain). That would talk about SR and
 may provide a key distinction between both.<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp; &#8220; At the end of the SR-MPLS path it =
is necessary to provide an<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; indication to the tail-end that NSH =
follows the SR-MPLS label stack.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; There are several ways to achieve th=
is but its specification is<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; outside the scope of this document.&=
#8221;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">I agree=
 that this is necessary.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">But why=
 is the main&nbsp; text related to SR-MPLS in this scenario, not specifying=
 the behaviour?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">I&nbsp;=
 don&#8217;t follow the logic of specifying it for SRv6 (and hence requirin=
g this document to be standard track while otherwise it could be an informa=
tional document describing two scenarios) and not
 specifying it for SR-MPLS.<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">Note that this text is du=
plicated in =A75.1. And 5.1 is nearly defining one proposition, so why not =
saying that this is a solution? (there is no need to define the encoding fo=
r the control plane since this part would likely not be in a spring documen=
t) (</span><span lang=3D"EN-GB">a<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; specific prefix-SID be allocated at =
each node for use by the SFC<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; </span><span lang=3D"FR">application=
 for this purpose.)<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">---<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">=A74<o:=
p></o:p></span></p>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; The benefits of this scheme include:=
<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB">[&#8230;].<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; o&nbsp; It simplifies the SFF (i.e.,=
 the SR router) by nullifying the<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;needs for re-class=
ification and SR proxy.<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Regardi=
ng the need for reclassification, it seems to me that SR alone can nullify<=
o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">Regarding the need for SR=
 proxy, the behaviour described seems very close to a SR proxy &#8220;</spa=
n><span lang=3D"EN-GB">The SFF strips<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; the SR information of the packet, up=
dates the SR information, and<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; saves it to a cache indexed by the N=
SH SPI.&nbsp; This saved SR<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; information is used to encapsulate a=
nd forward the packet(s) coming<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; </span><span lang=3D"FR">back from t=
he SF.&nbsp;=BB<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; o&nbsp; It provides a unique and sta=
ndard way to pass metadata to SFs.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Note that currentl=
y there is no solution for SR-MPLS to carry<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; metadata and there=
 is no solution to pass metadata to SR-unaware<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SFs.<o:p></o:p></s=
pan></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">RFC8595=
 provides another standard way to pass meta data for SR-MPLS.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><a href=
=3D"https://tools.ietf.org/html/rfc8595#section-12">https://tools.ietf.org/=
html/rfc8595#section-12</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">---<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">=A77.2<=
o:p></o:p></span></p>
<pre><span lang=3D"EN-GB">&#8220;&nbsp;&nbsp; Encapsulation of NSH followin=
g SRv6 may be indicated either by<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; encapsulating NSH in UDP (UDP port T=
BA1) and indicating UDP in the<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; Next Header field of the SRH, or by =
indicating an IP protocol number<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; for NSH in the Next Header of the SR=
H. &#8220;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Why is =
there a need for two solutions?
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If so, =
what are the applicability statement or pro&amp;con of each?<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">For int=
erop purpose, which one is mandatory and which one is optional?<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Thanks,=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Regards=
,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">--Bruno=
</span><span lang=3D"EN-GB"><o:p></o:p></span></p>
<pre><span lang=3D"FR">____________________________________________________=
_____________________________________________________________________<o:p><=
/o:p></span></pre>
<pre><span lang=3D"FR"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"FR">Ce message et ses pieces jointes peuvent contenir de=
s informations confidentielles ou privilegiees et ne doivent donc<o:p></o:p=
></span></pre>
<pre><span lang=3D"FR">pas etre diffuses, exploites ou copies sans autorisa=
tion. Si vous avez recu ce message par erreur, veuillez le signaler<o:p></o=
:p></span></pre>
<pre><span lang=3D"FR">a l'expediteur et le detruire ainsi que les pieces j=
ointes. Les messages electroniques etant susceptibles d'alteration,<o:p></o=
:p></span></pre>
<pre><span lang=3D"FR">Orange decline toute responsabilite si ce message a =
ete altere, deforme ou falsifie. Merci.<o:p></o:p></span></pre>
<pre><span lang=3D"FR"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"FR">This message and its attachments may contain confide=
ntial or privileged information that may be protected by law;<o:p></o:p></s=
pan></pre>
<pre><span lang=3D"FR">they should not be distributed, used or copied witho=
ut authorisation.<o:p></o:p></span></pre>
<pre><span lang=3D"FR">If you have received this email in error, please not=
ify the sender and delete this message and its attachments.<o:p></o:p></spa=
n></pre>
<pre><span lang=3D"FR">As emails may be altered, Orange is not liable for m=
essages that have been modified, changed or falsified.<o:p></o:p></span></p=
re>
<pre><span lang=3D"FR">Thank you.<o:p></o:p></span></pre>
</div>
<pre><span lang=3D"FR">____________________________________________________=
_____________________________________________________________________<o:p><=
/o:p></span></pre>
<pre><span lang=3D"FR"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"FR">Ce message et ses pieces jointes peuvent contenir de=
s informations confidentielles ou privilegiees et ne doivent donc<o:p></o:p=
></span></pre>
<pre><span lang=3D"FR">pas etre diffuses, exploites ou copies sans autorisa=
tion. Si vous avez recu ce message par erreur, veuillez le signaler<o:p></o=
:p></span></pre>
<pre><span lang=3D"FR">a l'expediteur et le detruire ainsi que les pieces j=
ointes. Les messages electroniques etant susceptibles d'alteration,<o:p></o=
:p></span></pre>
<pre><span lang=3D"FR">Orange decline toute responsabilite si ce message a =
ete altere, deforme ou falsifie. Merci.<o:p></o:p></span></pre>
<pre><span lang=3D"FR"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"FR">This message and its attachments may contain confide=
ntial or privileged information that may be protected by law;<o:p></o:p></s=
pan></pre>
<pre><span lang=3D"FR">they should not be distributed, used or copied witho=
ut authorisation.<o:p></o:p></span></pre>
<pre><span lang=3D"FR">If you have received this email in error, please not=
ify the sender and delete this message and its attachments.<o:p></o:p></spa=
n></pre>
<pre><span lang=3D"FR">As emails may be altered, Orange is not liable for m=
essages that have been modified, changed or falsified.<o:p></o:p></span></p=
re>
<pre><span lang=3D"FR">Thank you.<o:p></o:p></span></pre>
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To: Ron Bonica <rbonica@juniper.net>, "spring@ietf.org" <spring@ietf.org>
Cc: Jeff Tantsura <jefftant.ietf@gmail.com>
References: <161290433913.12363.16960324246191118896@ietfa.amsl.com> <BL0PR05MB5316F2735C589F67F7D69030AE8E9@BL0PR05MB5316.namprd05.prod.outlook.com>
From: Takuya Miyasaka <ta-miyasaka@kddi-research.jp>
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Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-srv6-end-dtm-02.txt
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Hi Ron,

Thank you for the quick update and I confirmed that my comments are 
incorporated in this version.

Thanks,
Takuya

On 2021/02/10 6:04, Ron Bonica wrote:
> Folks,
>
> The draft has been updated to reflect Takuya's and Jeff's comments.
>
>                                                     Ron
>
>
> Juniper Business Use Only
>
>> -----Original Message-----
>> From: internet-drafts@ietf.org <internet-drafts@ietf.org>
>> Sent: Tuesday, February 9, 2021 3:59 PM
>> To: Greg Mirsky <gregimirsky@gmail.com>; Peng Shaofu
>> <peng.shaofu@zte.com.cn>; Ron Bonica <rbonica@juniper.net>; Shaofu Peng
>> <peng.shaofu@zte.com.cn>; Shraddha Hegde <shraddha@juniper.net>; EXT-
>> zhang.zheng@zte.com.cn <zhang.zheng@zte.com.cn>
>> Subject: New Version Notification for draft-bonica-spring-srv6-end-dtm-02.txt
>>
>> [External Email. Be cautious of content]
>>
>>
>> A new version of I-D, draft-bonica-spring-srv6-end-dtm-02.txt
>> has been successfully submitted by Ron Bonica and posted to the IETF
>> repository.
>>
>> Name:           draft-bonica-spring-srv6-end-dtm
>> Revision:       02
>> Title:          The SRv6 END.DTM Endpoint Behavior
>> Document date:  2021-02-09
>> Group:          Individual Submission
>> Pages:          7
>> URL: https://www.ietf.org/archive/id/draft-bonica-spring-srv6-end-dtm-02.txt
>> Status: https://datatracker.ietf.org/doc/draft-bonica-spring-srv6-end-dtm
>> Htmlized:  https://datatracker.ietf.org/doc/html/draft-bonica-spring-srv6-end-dtm
>> Htmlized:       https://tools.ietf.org/html/draft-bonica-spring-srv6-end-dtm-02
>> Diff: https://www.ietf.org/rfcdiff?url2=draft-bonica-spring-srv6-end-dtm-02
> Abstract:
>>     This document describes a new SRv6 endpoint behavior, called END.DTM.
>>     The END.DTM endpoint behavior supports inter-working between SRv6 and
>>     SR-MPLS.  Like any endpoint behavior, END.DTM contains a function and
>>     arguments.  The function causes the processing SRv6 node to remove an
>>     SRv6 header, impose an SR-MPLS label stack, and forward the packet to
>>     its next hop.  The arguments determine MPLS-label stack contents and
>>     the next hop.
>>
>>
>>
>>
>> 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.
>>
>> The IETF Secretariat
>>


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From: "Chengli (Cheng Li)" <c.l@huawei.com>
To: James Guichard <james.n.guichard@futurewei.com>, "spring@ietf.org" <spring@ietf.org>
CC: "spring-chairs@ietf.org" <spring-chairs@ietf.org>
Thread-Topic: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Hi SPRING,

I have read the document and think it is mature and ready to be adopted.

This document describes how to implement SR-based VTN using resource-aware =
SIDs, which is very helpful for people to understand.

I would like to work on it as well!  :)

Thanks to the authors!
Cheng




From: spring [mailto:spring-bounces@ietf.org] On Behalf Of James Guichard
Sent: Wednesday, January 27, 2021 7:47 PM
To: spring@ietf.org
Cc: spring-chairs@ietf.org
Subject: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vp=
n

Dear WG:

This message starts a 2 week WG adoption call for https://datatracker.ietf.=
org/doc/draft-dong-spring-sr-for-enhanced-vpn/ ending February 10th 2021.

After review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, plea=
se state this explicitly. This gives the chairs an indication of the energy=
 level of people in the working group willing to work on this document. Ple=
ase also provide comments/reasons for your support (or lack thereof) as thi=
s is a stronger way to indicate your (non) support as this is not a vote.

Thanks!

Jim, Bruno & Joel




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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi SPRING,<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">I have read the docume=
nt and think it is mature and ready to be adopted.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">This document describe=
s how to implement SR-based VTN using resource-aware SIDs, which is very he=
lpful for people to understand.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">I would like to work o=
n it as well!&nbsp;
</span><span style=3D"font-family:Wingdings;color:#1F497D">J</span><span st=
yle=3D"color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Thanks to the authors!=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Cheng<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b>From:</b> spring [mailto:spring-bounces@ietf.org]=
 <b>On Behalf Of
</b>James Guichard<br>
<b>Sent:</b> Wednesday, January 27, 2021 7:47 PM<br>
<b>To:</b> spring@ietf.org<br>
<b>Cc:</b> spring-chairs@ietf.org<br>
<b>Subject:</b> [spring] WG Adoption Call for draft-dong-spring-sr-for-enha=
nced-vpn<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Dear WG:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">This message starts a 2 week WG adoption call for <a=
 href=3D"https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced=
-vpn/">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">After review of the document please indicate support=
 (or not) for WG adoption to the mailing list and if you are willing to wor=
k on the document, please state this explicitly. This gives the chairs an i=
ndication of the energy level of people
 in the working group willing to work on this document. Please also provide=
 comments/reasons for your support (or lack thereof) as this is a stronger =
way to indicate your (non) support as this is not a vote.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks!<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Jim, Bruno &amp; Joel<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>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</body>
</html>

--_000_C7C2E1C43D652C4E9E49FE7517C236CB02E3787Cdggeml529mbxchi_--


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Date: Wed, 10 Feb 2021 05:57:11 +0000
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Subject: Re: [spring] IPR call for draft-ietf-spring-nsh-sr
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Hi all,

As a co-author, I confirm that I don't have any IPR nor I'm aware of any re=
lated to this draft.

It seems that we missed to include some MTU considerations in the text. Alt=
hough these issues are not specific to this spec, but reminding the issues =
would be helpful. Adding a pointer to Section 5 of RFC8300 and similar sect=
ions of SR specs would be the minimum.

Another point that needs more focus from the spring wg is the IANA port ass=
ignment requests. I know there is a push back to assign new ports (especial=
ly, to assign more than one port number for a service) if no solid justific=
ations are provided. Please refer to https://www.rfc-editor.org/rfc/rfc7605=
#section-7.

Other than that, I do think that the document is stable enough to move forw=
ard.

Cheers,
Med

De : sfc [mailto:sfc-bounces@ietf.org] De la part de bruno.decraene@orange.=
com
Envoy=E9 : mardi 9 f=E9vrier 2021 19:48
=C0 : sfc@ietf.org
Cc : spring@ietf.org; spring-chairs@ietf.org
Objet : [sfc] FW: [spring] IPR call for draft-ietf-spring-nsh-sr

Dear SFC WG,

The SPRING WG is starting a working group last call for draft-ietf-spring-n=
sh-sr. [1]
This document describes the integration of Network Service Header (NSH) [RF=
C8300] and Segment Routing (SR) [RFC8402], as well as  encapsulation detail=
s, to support Service Function Chaining (SFC)  [RFC7665].

The SPRING WG would welcome SFC WG review of this document, more specifical=
ly on the SFC and NSH related aspects.
Please send the comments on the SPRING WG list.

Thank you,
Best regards,
--Bruno


[1] https://tools.ietf.org/html/draft-ietf-spring-nsh-sr


From: spring [mailto:spring-bounces@ietf.org] On Behalf Of bruno.decraene@o=
range.com<mailto:bruno.decraene@orange.com>
Sent: Tuesday, February 9, 2021 7:06 PM
To: spring@ietf.org<mailto:spring@ietf.org>; draft-ietf-spring-nsh-sr@ietf.=
org<mailto:draft-ietf-spring-nsh-sr@ietf.org>
Subject: [spring] IPR call for draft-ietf-spring-nsh-sr

Hi authors, contributors, WG

Authors of draft-ietf-spring-nsh-sr have asked for WG last call.
In preparation of the WGLC on draft-ietf-spring-nsh-sr [1], this email star=
ts a poll for IPR.

If you are aware of IPR that applies to draft-ietf-spring-nsh-sr please res=
pond to this email and keep the mailing list in copy.
If you are aware of IPR, please indicate whether it has been disclosed in a=
ccordance to the IETF IPR rules (detailed are described in RFCs 3979, 4879,=
 3669 and 5378).

If you are an *author or contributor* please respond to this email, on the =
SPRING mailing list, regardless of whether or not you're aware of any IPR.
If you are not an author or contributor, please explicitly respond only if =
you're aware of IPR that has not yet been disclosed.

Thanks,
Regards,
Bruno, Jim, Joel

[1] https://tools.ietf.org/html/draft-ietf-spring-nsh-sr


From: spring [mailto:spring-bounces@ietf.org] On Behalf Of bruno.decraene@o=
range.com<mailto:bruno.decraene@orange.com>
Sent: Monday, November 2, 2020 4:26 PM
To: spring@ietf.org<mailto:spring@ietf.org>; draft-ietf-spring-nsh-sr@ietf.=
org<mailto:draft-ietf-spring-nsh-sr@ietf.org>
Subject: [spring] draft-ietf-spring-nsh-sr

Hi authors, WG,

Authors of draft-ietf-spring-nsh-sr have asked for WG last call.
Before initiating it, I've done a review of the draft as document shepherd.
Please find below some comments.

---
It's not crystal clear to me what the scope and the goal of the document ar=
e.

-          From the abstract, it's an informative description of two applic=
ations scenarios

-          From section 5, it's a specification of how to integrate NSH and=
 SR.

o   Although it's only really specified for SRv6 and not SR-MPLS.

Please clarify to update the document as needed.

----
IdNits reports for 2 errors. [1]
  ** Downref: Normative reference to an Informational RFC: RFC 7665

-          Probably the only really normative reference is in the security =
section. Do you think that a reference to RFC8300 could be used instead (83=
00 has a large security consideration section)?

-          I noticed that 8300 had the same issue. What was the feedback fr=
om AD at the time?

  ** There are 4 instances of too long lines in the document, the longest o=
ne
     being 82 characters in excess of 72.
Could you please correct in the next version of the draft?

[1] https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/draft-iet=
f-spring-nsh-sr-03.txt
-----
Abstract


The abstract feels like the document is informational (e.g., This document =
describes two application scenarios")
But the document asks for an IANA allocation requiring a STD track document=
, so the draft needs to be std track.
Do you think that you could add that the document defines the encapsulation=
 of NSH for SR-MPLS and SRv6?

----
The introduction section seems to be coming from the SFC WG.

-          May be adding some text about SPRING?

-          Although this is a personal opinion, I find some sentences a bit=
 marketing oriented. Could you please have a look? E.g.

o    "The SFC architecture has the merit to not make assumptions"
What about "The SFC architecture does not make assumptions"? This seems mor=
e neutral.

o    "Among all these approaches, the IETF endorsed a transport-independent

-             SFC encapsulation scheme: NSH [RFC8300<https://tools.ietf.org=
/html/rfc8300>]; which is the most mature SFC encapsulation solution. =BB
I'm not sure how much "is the most mature" is true or not. I'm not sure tha=
t the SPRING WG needs to make such statement nor that it is best placed to =
make such statement.
I'm not sure about "the IETF endorsed a transport-independent  SFC encapsul=
ation scheme". Idem with regards to SPRING WG. I'm not sure that this is a =
typical statement in RFC. If so, it feels like the IETF would have equally =
endorsed transport-depending SFC encapsulation scheme. [RFC8595] https://to=
ols.ietf.org/html/rfc8595

-          "This design is pragmatic"
Looks like an opinion. Plus I'm not sure that the SPRING WG needs to judge =
the work of the SFC WG.
----
=A72

"The two SR flavors, namely SR-MPLS [RFC8660<https://tools.ietf.org/html/rf=
c8660>] and SRv6 [RFC8754<https://tools.ietf.org/html/rfc8754>],"

May be :s/flavors/data plane


"Further considerations such as simplifying classification at intermediate =
SFs"
I'm not sure that simplifying classification is the main point of adding NS=
H. RFC8595 does not refers to this. A priori SR supports a single initial c=
lassification.


----
=A72

"A classifier SHOULD assign an NSH Service Path Identifier (SPI) per

   SR policy so that different traffic flows that use the same NSH

   Service Function Path (SFP) but different SR policy can coexist on

   the same SFP without conflict during SFF processing."



Is the above sentence applicable to both applications scenarios or only for=
 the second one (SR-based SFC with integrated NSH service plane)?

In the current text, it's applicable to both while I'm not sure that it's a=
pplicable to "NSH-based SFC with SR-based transport plane" where the transp=
ort plane (hence the SR policy) is independent of the service plane.

---

=AB hierarchical SFC [RFC8459<https://tools.ietf.org/html/rfc8459>] =BB

Does this document specifically covers hierarchical SFC (hence hierarchical=
 SFC & SR)? Is this reference really pertinent?


---
=A73
Section 3 barely speaks about SR. Is this really a SPRING document?

When SR is refered to, there is nothing specific to SR.

e.g. "After removing the outer transport encapsulation, that may or may not=
 be SR-MPLS or SRv6,"
If the document is related to the integration of SFC and SR, surely the enc=
apsulation is either SR-MPLS or SRv6 (rather than may or may not be SR).

May be indicating that in this scenario, there is a priori one SR-policy pe=
r SF (while in the next scenario, there is a single SR-policy for the whole=
 service chain). That would talk about SR and may provide a key distinction=
 between both.





  " At the end of the SR-MPLS path it is necessary to provide an

   indication to the tail-end that NSH follows the SR-MPLS label stack.

   There are several ways to achieve this but its specification is

   outside the scope of this document."


I agree that this is necessary.
But why is the main  text related to SR-MPLS in this scenario, not specifyi=
ng the behaviour?
I  don't follow the logic of specifying it for SRv6 (and hence requiring th=
is document to be standard track while otherwise it could be an information=
al document describing two scenarios) and not specifying it for SR-MPLS.

Note that this text is duplicated in =A75.1. And 5.1 is nearly defining one=
 proposition, so why not saying that this is a solution? (there is no need =
to define the encoding for the control plane since this part would likely n=
ot be in a spring document) (a

   specific prefix-SID be allocated at each node for use by the SFC

   application for this purpose.)


---
=A74

   The benefits of this scheme include:



[...].



   o  It simplifies the SFF (i.e., the SR router) by nullifying the

      needs for re-classification and SR proxy.

Regarding the need for reclassification, it seems to me that SR alone can n=
ullify

Regarding the need for SR proxy, the behaviour described seems very close t=
o a SR proxy "The SFF strips

   the SR information of the packet, updates the SR information, and

   saves it to a cache indexed by the NSH SPI.  This saved SR

   information is used to encapsulate and forward the packet(s) coming

   back from the SF. =BB






   o  It provides a unique and standard way to pass metadata to SFs.

      Note that currently there is no solution for SR-MPLS to carry

      metadata and there is no solution to pass metadata to SR-unaware

      SFs.

RFC8595 provides another standard way to pass meta data for SR-MPLS.
https://tools.ietf.org/html/rfc8595#section-12

---
=A77.2

"   Encapsulation of NSH following SRv6 may be indicated either by

   encapsulating NSH in UDP (UDP port TBA1) and indicating UDP in the

   Next Header field of the SRH, or by indicating an IP protocol number

   for NSH in the Next Header of the SRH. "


Why is there a need for two solutions?
If so, what are the applicability statement or pro&con of each?
For interop purpose, which one is mandatory and which one is optional?

Thanks,
Regards,
--Bruno

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<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=3D"FR" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;c=
olor:black">Hi all, <o:p>
</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;c=
olor:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;color:black">As a co-author, I confirm that I don&#8217;t hav=
e any IPR nor I&#8217;m aware of any related to this draft.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;color:black">It seems that we missed to include some MTU cons=
iderations in the text. Although these issues are not specific to this spec=
, but reminding the issues would be helpful. Adding
 a pointer to Section 5 of RFC8300 and similar sections of SR specs would b=
e the minimum.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;color:black">Another point that needs more focus from the spr=
ing wg is the IANA port assignment requests. I know there is a push back to=
 assign new ports (especially, to assign more than
 one port number for a service) if no solid justifications are provided. </=
span><span style=3D"font-family:&quot;Courier New&quot;;color:black">Please=
 refer to
</span><span lang=3D"EN-US" style=3D"font-family:&quot;Courier New&quot;;co=
lor:black"><a href=3D"https://www.rfc-editor.org/rfc/rfc7605#section-7"><sp=
an lang=3D"FR">https://www.rfc-editor.org/rfc/rfc7605#section-7</span></a><=
/span><span style=3D"font-family:&quot;Courier New&quot;;color:black">.
 &nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;c=
olor:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;color:black">Other than that, I do think that the document is=
 stable enough to move forward.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-family:&quot;Cour=
ier New&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;c=
olor:black">Cheers,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;c=
olor:black">Med<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Courier New&quot;;c=
olor:black"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"mso-fareast-language:FR">De&nbsp;:=
</span></b><span style=3D"mso-fareast-language:FR"> sfc [mailto:sfc-bounces=
@ietf.org]
<b>De la part de</b> bruno.decraene@orange.com<br>
<b>Envoy=E9&nbsp;:</b> mardi 9 f=E9vrier 2021 19:48<br>
<b>=C0&nbsp;:</b> sfc@ietf.org<br>
<b>Cc&nbsp;:</b> spring@ietf.org; spring-chairs@ietf.org<br>
<b>Objet&nbsp;:</b> [sfc] FW: [spring] IPR call for draft-ietf-spring-nsh-s=
r<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Dear SF=
C WG,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">The SPR=
ING WG is starting a working group last call for draft-ietf-spring-nsh-sr. =
[1]<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">This do=
cument describes the integration of Network Service Header (NSH) [RFC8300] =
and Segment Routing (SR) [RFC8402], as well as&nbsp; encapsulation details,=
 to support Service Function Chaining (SFC)&nbsp;
 [RFC7665].<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">The SPR=
ING WG would welcome SFC WG review of this document, more specifically on t=
he SFC and NSH related aspects.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Please =
send the comments on the SPRING WG list.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Thank y=
ou,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Best re=
gards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">--Bruno=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">[1] <a =
href=3D"https://tools.ietf.org/html/draft-ietf-spring-nsh-sr">
https://tools.ietf.org/html/draft-ietf-spring-nsh-sr</a><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"mso-fareast-language:FR">From:</sp=
an></b><span style=3D"mso-fareast-language:FR"> spring [<a href=3D"mailto:s=
pring-bounces@ietf.org">mailto:spring-bounces@ietf.org</a>]
<b>On Behalf Of </b><a href=3D"mailto:bruno.decraene@orange.com">bruno.decr=
aene@orange.com</a><br>
<b>Sent:</b> Tuesday, February 9, 2021 7:06 PM<br>
<b>To:</b> <a href=3D"mailto:spring@ietf.org">spring@ietf.org</a>; <a href=
=3D"mailto:draft-ietf-spring-nsh-sr@ietf.org">
draft-ietf-spring-nsh-sr@ietf.org</a><br>
<b>Subject:</b> [spring] IPR call for draft-ietf-spring-nsh-sr<o:p></o:p></=
span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Hi auth=
ors, contributors, WG<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Authors=
 of draft-ietf-spring-nsh-sr have asked for WG last call.<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">In prep=
aration of the WGLC on draft-ietf-spring-nsh-sr [1], this email starts a po=
ll for IPR.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If you =
are aware of IPR that applies to draft-ietf-spring-nsh-sr please respond to=
 this email and keep the mailing list in copy.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If you =
are aware of IPR, please indicate whether it has been disclosed in accordan=
ce to the IETF IPR rules (detailed are described in RFCs 3979, 4879, 3669 a=
nd 5378).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If you =
are an *author or contributor* please respond to this email, on the SPRING =
mailing list, regardless of whether or not you're aware of any IPR.<o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If you =
are not an author or contributor, please explicitly respond only if you're =
aware of IPR that has not yet been disclosed.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Thanks,=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Regards=
,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Bruno, =
Jim, Joel<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">[1] <a =
href=3D"https://tools.ietf.org/html/draft-ietf-spring-nsh-sr">
https://tools.ietf.org/html/draft-ietf-spring-nsh-sr</a><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"mso-fareast-language:FR">From:</sp=
an></b><span style=3D"mso-fareast-language:FR"> spring [<a href=3D"mailto:s=
pring-bounces@ietf.org">mailto:spring-bounces@ietf.org</a>]
<b>On Behalf Of </b><a href=3D"mailto:bruno.decraene@orange.com">bruno.decr=
aene@orange.com</a><br>
<b>Sent:</b> Monday, November 2, 2020 4:26 PM<br>
<b>To:</b> <a href=3D"mailto:spring@ietf.org">spring@ietf.org</a>; <a href=
=3D"mailto:draft-ietf-spring-nsh-sr@ietf.org">
draft-ietf-spring-nsh-sr@ietf.org</a><br>
<b>Subject:</b> [spring] draft-ietf-spring-nsh-sr<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Hi auth=
ors, WG,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Authors=
 of draft-ietf-spring-nsh-sr have asked for WG last call.<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Before =
initiating it, I&#8217;ve done a review of the draft as document shepherd.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Please =
find below some comments.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">---<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">It&#821=
7;s not crystal clear to me what the scope and the goal of the document are=
.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D">=
<span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New =
Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D"=
>From the abstract, it&#8217;s an informative description of two applicatio=
ns scenarios<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D">=
<span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New =
Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D"=
>From section 5, it&#8217;s a specification of how to integrate NSH and SR.=
<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l1 level2 lfo2">
<![if !supportLists]><span lang=3D"EN-GB" style=3D"font-family:&quot;Courie=
r New&quot;;color:#1F497D"><span style=3D"mso-list:Ignore">o<span style=3D"=
font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D"=
>Although it&#8217;s only really specified for SRv6 and not SR-MPLS.<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Please =
clarify to update the document as needed.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">IdNits =
reports for 2 errors. [1]
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp;** Down=
ref: Normative reference to an Informational RFC: RFC 7665<o:p></o:p></span=
></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D;m=
so-fareast-language:EN-US"><span style=3D"mso-list:Ignore">-<span style=3D"=
font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D;=
mso-fareast-language:EN-US">Probably the only really normative reference is=
 in the security section. Do you think that a reference to RFC8300 could be=
 used instead (8300 has a large security
 consideration section)?<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D;m=
so-fareast-language:EN-US"><span style=3D"mso-list:Ignore">-<span style=3D"=
font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D;=
mso-fareast-language:EN-US">I noticed that 8300 had the same issue. What wa=
s the feedback from AD at the time?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp; ** There are=
 4 instances of too long lines in the document, the longest one<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp;&nbsp;&=
nbsp; being 82 characters in excess of 72.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"text-indent:35.4pt"><span lang=3D"EN-GB" st=
yle=3D"color:#1F497D">Could you please correct in the next version of the d=
raft?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">[1] <a =
href=3D"https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/draft=
-ietf-spring-nsh-sr-03.txt">
https://tools.ietf.org/idnits?url=3Dhttps://tools.ietf.org/id/draft-ietf-sp=
ring-nsh-sr-03.txt</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">-----<o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Abstrac=
t<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"font-size:11.0pt;font-family:&quot;Calib=
ri&quot;,sans-serif;color:#1F497D;mso-fareast-language:EN-US">The abstract =
feels like the document is informational (e.g.,</span><span lang=3D"EN-GB" =
style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D;mso-farea=
st-language:EN-US"> </span><span lang=3D"EN-GB">This document describes two=
 application scenarios&#8221;)<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">But the=
 document asks for an IANA allocation requiring a STD track document, so th=
e draft needs to be std track.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Do you =
think that you could add that the document defines the encapsulation of NSH=
 for SR-MPLS and SRv6?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">----<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">The int=
roduction section seems to be coming from the SFC WG.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"color:#1F497D">=
<span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &quot;Times New =
Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D"=
>May be adding some text about SPRING?<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB"><span style=3D"mso-list:=
Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D"=
>Although this is a personal opinion, I find some sentences a bit marketing=
 oriented. Could you please have a look? E.g.
</span><span lang=3D"EN-GB"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo4">
<![if !supportLists]><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-fa=
mily:&quot;Courier New&quot;"><span style=3D"mso-list:Ignore">o<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"color:#1F497D"=
>&#8220;</span><span lang=3D"EN-GB">The SFC architecture has the merit to n=
ot make
</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Cou=
rier New&quot;">assumptions</span><span lang=3D"EN-GB">&#8221;<br>
<span style=3D"color:#1F497D">What about &#8220;The SFC architecture does n=
ot make assumptions&#8221;? This seems more neutral.</span>
</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Cou=
rier New&quot;"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt;text-indent:-18.0=
pt;mso-list:l0 level2 lfo4">
<![if !supportLists]><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-fa=
mily:&quot;Courier New&quot;"><span style=3D"mso-list:Ignore">o<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB">&#8220;</span><span lan=
g=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;">=
Among all these approaches, the IETF endorsed a transport-independent<o:p><=
/o:p></span></p>
<pre style=3D"margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo=
4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"font-family:&quot;Cal=
ibri&quot;,sans-serif"><span style=3D"mso-list:Ignore">-<span style=3D"font=
:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp; </span></span></span><![endif]><span lang=3D"EN-GB">&nbsp;&=
nbsp;&nbsp;SFC encapsulation scheme: NSH [</span><a href=3D"https://tools.i=
etf.org/html/rfc8300" title=3D"&quot;Network Service Header (NSH)&quot;"><s=
pan lang=3D"EN-GB">RFC8300</span></a><span lang=3D"EN-GB">]; which is the m=
ost mature SFC encapsulation solution.&nbsp;=BB<br><span style=3D"color:#1F=
497D">I&#8217;m not sure how much &#8220;is the most mature&#8221; is true =
or not. I&#8217;m not sure that the SPRING WG needs to make such statement =
nor that it is best placed to make such statement.<br>I&#8217;m not sure ab=
out &#8220;</span>the IETF endorsed a transport-independent&nbsp; SFC encap=
sulation scheme&#8221;. <span style=3D"color:#1F497D">Idem with regards to =
SPRING WG. I&#8217;m not sure that this is a typical statement in RFC. If s=
o, it feels like the IETF would have equally endorsed transport-depending S=
FC encapsulation scheme. [RFC8595] <a href=3D"https://tools.ietf.org/html/r=
fc8595">https://tools.ietf.org/html/rfc8595</a></span><o:p></o:p></span></p=
re>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo4"><![if !supportLists]><span lang=3D"EN-GB" style=3D"font-size:10.0p=
t"><span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &quot;Times N=
ew Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"font-size:10.0=
pt;font-family:&quot;Courier New&quot;">&#8220;This design is pragmatic&#82=
21;<br>
</span><span lang=3D"EN-GB" style=3D"color:#1F497D">Looks like an opinion. =
Plus I&#8217;m not sure that the SPRING WG needs to judge the work of the S=
FC WG.</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&qu=
ot;Courier New&quot;"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">=A72<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB">&#8220;The two SR flavors, namely SR-MPLS [</span=
><a href=3D"https://tools.ietf.org/html/rfc8660" title=3D"&quot;Segment Rou=
ting with the MPLS Data Plane&quot;"><span lang=3D"EN-GB">RFC8660</span></a=
><span lang=3D"EN-GB">] and SRv6 [</span><a href=3D"https://tools.ietf.org/=
html/rfc8754" title=3D"&quot;IPv6 Segment Routing Header (SRH)&quot;"><span=
 lang=3D"EN-GB">RFC8754</span></a><span lang=3D"EN-GB">],&#8221;<o:p></o:p>=
</span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">May be :s/flavors/data pl=
ane</span><span lang=3D"EN-GB"><o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"EN-GB">&#8220;Further considerations such as simplifying=
 classification at intermediate SFs&#8221;<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">I&#8217=
;m not sure that simplifying classification is the main point of adding NSH=
. RFC8595 does not refers to this. A priori SR supports a single initial cl=
assification.</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-fam=
ily:&quot;Courier New&quot;"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:72.0pt"><span lang=3D"EN=
-GB" style=3D"font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">----<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">=A72<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB">&#8220;A classifier SHOULD assign an NSH Service =
Path Identifier (SPI) per<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; SR policy so that different traffic =
flows that use the same NSH<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; Service Function Path (SFP) but diff=
erent SR policy can coexist on<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; the same SFP without conflict during=
 SFF processing.&#8221;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">Is the above sentence app=
licable to both applications scenarios or only for the second one (</span><=
span lang=3D"EN-GB">SR-based SFC with integrated NSH service plane)?<o:p></=
o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">In the current text, it&#=
8217;s applicable to both while I&#8217;m not sure that it&#8217;s applicab=
le to &#8220;</span><span lang=3D"EN-GB">NSH-based SFC with SR-based transp=
ort plane&#8221;<span style=3D"color:#1F497D"> where the transport plane (h=
ence the SR policy) is independent of the service plane.<o:p></o:p></span><=
/span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">---<o:p></o:p></span></pr=
e>
<pre>=AB&nbsp;hierarchical SFC [<a href=3D"https://tools.ietf.org/html/rfc8=
459" title=3D"&quot;Hierarchical Service Function Chaining (hSFC)&quot;">RF=
C8459</a>]&nbsp;=BB <o:p></o:p></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">Does this document specif=
ically covers hierarchical SFC (hence hierarchical SFC &amp; SR)? Is this r=
eference really pertinent?</span><span lang=3D"EN-GB"><o:p></o:p></span></p=
re>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">---<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">=A73<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Section=
 3 barely speaks about SR. Is this really a SPRING document?<o:p></o:p></sp=
an></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">When SR is refered to, th=
ere is nothing specific to SR.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">e.g. &#8220;</span><span =
lang=3D"EN-GB">After removing the outer transport encapsulation, that may o=
r may not be SR-MPLS or SRv6,&#8221;<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If the =
document is related to the integration of SFC and SR, surely the encapsulat=
ion is either SR-MPLS or SRv6 (rather than may or may not be SR).<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">May be =
indicating that in this scenario, there is a priori one SR-policy per SF (w=
hile in the next scenario, there is a single SR-policy for the whole servic=
e chain). That would talk about SR and
 may provide a key distinction between both.<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp; &#8220; At the end of the SR-MPLS path it =
is necessary to provide an<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; indication to the tail-end that NSH =
follows the SR-MPLS label stack.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; There are several ways to achieve th=
is but its specification is<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; outside the scope of this document.&=
#8221;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">I agree=
 that this is necessary.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">But why=
 is the main&nbsp; text related to SR-MPLS in this scenario, not specifying=
 the behaviour?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">I&nbsp;=
 don&#8217;t follow the logic of specifying it for SRv6 (and hence requirin=
g this document to be standard track while otherwise it could be an informa=
tional document describing two scenarios) and not
 specifying it for SR-MPLS.<o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">Note that this text is du=
plicated in =A75.1. And 5.1 is nearly defining one proposition, so why not =
saying that this is a solution? (there is no need to define the encoding fo=
r the control plane since this part would likely not be in a spring documen=
t) (</span><span lang=3D"EN-GB">a<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; specific prefix-SID be allocated at =
each node for use by the SFC<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; </span>application for this purpose.=
)<o:p></o:p></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">---<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">=A74<o:=
p></o:p></span></p>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; The benefits of this scheme include:=
<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB">[&#8230;].<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; o&nbsp; It simplifies the SFF (i.e.,=
 the SR router) by nullifying the<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; needs for re-class=
ification and SR proxy.<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Regardi=
ng the need for reclassification, it seems to me that SR alone can nullify<=
o:p></o:p></span></p>
<pre><span lang=3D"EN-GB" style=3D"color:#1F497D">Regarding the need for SR=
 proxy, the behaviour described seems very close to a SR proxy &#8220;</spa=
n><span lang=3D"EN-GB">The SFF strips<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; the SR information of the packet, up=
dates the SR information, and<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; saves it to a cache indexed by the N=
SH SPI.&nbsp; This saved SR<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; information is used to encapsulate a=
nd forward the packet(s) coming<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; </span>back from the SF.&nbsp;=BB<o:=
p></o:p></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; o&nbsp; It provides a unique and sta=
ndard way to pass metadata to SFs.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Note that currentl=
y there is no solution for SR-MPLS to carry<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; metadata and there=
 is no solution to pass metadata to SR-unaware<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SFs.<o:p></o:p></s=
pan></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">RFC8595=
 provides another standard way to pass meta data for SR-MPLS.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><a href=
=3D"https://tools.ietf.org/html/rfc8595#section-12">https://tools.ietf.org/=
html/rfc8595#section-12</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">---<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">=A77.2<=
o:p></o:p></span></p>
<pre><span lang=3D"EN-GB">&#8220;&nbsp;&nbsp; Encapsulation of NSH followin=
g SRv6 may be indicated either by<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; encapsulating NSH in UDP (UDP port T=
BA1) and indicating UDP in the<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; Next Header field of the SRH, or by =
indicating an IP protocol number<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB">&nbsp;&nbsp; for NSH in the Next Header of the SR=
H. &#8220;<o:p></o:p></span></pre>
<pre><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Why is =
there a need for two solutions?
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">If so, =
what are the applicability statement or pro&amp;con of each?<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">For int=
erop purpose, which one is mandatory and which one is optional?<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Thanks,=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">Regards=
,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"color:#1F497D">--Bruno=
</span><span lang=3D"EN-GB"><o:p></o:p></span></p>
<pre>______________________________________________________________________=
___________________________________________________<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>Ce message et ses pieces jointes peuvent contenir des informations con=
fidentielles ou privilegiees et ne doivent donc<o:p></o:p></pre>
<pre>pas etre diffuses, exploites ou copies sans autorisation. Si vous avez=
 recu ce message par erreur, veuillez le signaler<o:p></o:p></pre>
<pre>a l'expediteur et le detruire ainsi que les pieces jointes. Les messag=
es electroniques etant susceptibles d'alteration,<o:p></o:p></pre>
<pre>Orange decline toute responsabilite si ce message a ete altere, deform=
e ou falsifie. Merci.<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>This message and its attachments may contain confidential or privilege=
d information that may be protected by law;<o:p></o:p></pre>
<pre>they should not be distributed, used or copied without authorisation.<=
o:p></o:p></pre>
<pre>If you have received this email in error, please notify the sender and=
 delete this message and its attachments.<o:p></o:p></pre>
<pre>As emails may be altered, Orange is not liable for messages that have =
been modified, changed or falsified.<o:p></o:p></pre>
<pre>Thank you.<o:p></o:p></pre>
</div>
<pre>______________________________________________________________________=
___________________________________________________<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>Ce message et ses pieces jointes peuvent contenir des informations con=
fidentielles ou privilegiees et ne doivent donc<o:p></o:p></pre>
<pre>pas etre diffuses, exploites ou copies sans autorisation. Si vous avez=
 recu ce message par erreur, veuillez le signaler<o:p></o:p></pre>
<pre>a l'expediteur et le detruire ainsi que les pieces jointes. Les messag=
es electroniques etant susceptibles d'alteration,<o:p></o:p></pre>
<pre>Orange decline toute responsabilite si ce message a ete altere, deform=
e ou falsifie. Merci.<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>This message and its attachments may contain confidential or privilege=
d information that may be protected by law;<o:p></o:p></pre>
<pre>they should not be distributed, used or copied without authorisation.<=
o:p></o:p></pre>
<pre>If you have received this email in error, please notify the sender and=
 delete this message and its attachments.<o:p></o:p></pre>
<pre>As emails may be altered, Orange is not liable for messages that have =
been modified, changed or falsified.<o:p></o:p></pre>
<pre>Thank you.<o:p></o:p></pre>
<pre>______________________________________________________________________=
___________________________________________________<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>Ce message et ses pieces jointes peuvent contenir des informations con=
fidentielles ou privilegiees et ne doivent donc<o:p></o:p></pre>
<pre>pas etre diffuses, exploites ou copies sans autorisation. Si vous avez=
 recu ce message par erreur, veuillez le signaler<o:p></o:p></pre>
<pre>a l'expediteur et le detruire ainsi que les pieces jointes. Les messag=
es electroniques etant susceptibles d'alteration,<o:p></o:p></pre>
<pre>Orange decline toute responsabilite si ce message a ete altere, deform=
e ou falsifie. Merci.<o:p></o:p></pre>
<pre><o:p>&nbsp;</o:p></pre>
<pre>This message and its attachments may contain confidential or privilege=
d information that may be protected by law;<o:p></o:p></pre>
<pre>they should not be distributed, used or copied without authorisation.<=
o:p></o:p></pre>
<pre>If you have received this email in error, please notify the sender and=
 delete this message and its attachments.<o:p></o:p></pre>
<pre>As emails may be altered, Orange is not liable for messages that have =
been modified, changed or falsified.<o:p></o:p></pre>
<pre>Thank you.<o:p></o:p></pre>
</div>
</div>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/jnckFyPqwDoJ2ArvtfJI2bWpeyk>
Subject: Re: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Dear WG
I support the adoption of this document. It describes a useful mechanism to=
 build multiple SR based virtual networks for different purposes.



=E2=80=8BWarm regards,
Luc-Fabrice
 
Ndifor
Specialist - IP Access and Data center
Luc-Fabrice.Ndifor@mtn.com
T +237 677 55 02 13
Head Office: 360, Rue Drouot
=E2=80=8BP.O. Box 15 574 Douala, Cameroon
T +237 679 00 90 90
 | mtn.cm
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From: spring <spring-bounces@ietf.org> On Behalf Of James Guichard
Sent: Wednesday, January 27, 2021 12:47 PM
To: spring@ietf.org
Cc: spring-chairs@ietf.org
Subject: [spring] WG Adoption Call for draft-dong-spring-sr-for-enhanced-vp=
n

Dear WG:

This message starts a 2 week WG adoption call for https://datatracker.ietf.=
org/doc/draft-dong-spring-sr-for-enhanced-vpn/ ending February 10th 2021.

After review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, plea=
se state this explicitly. This gives the chairs an indication of the energy=
 level of people in the working group willing to work on this document. Ple=
ase also provide comments/reasons for your support (or lack thereof) as thi=
s is a stronger way to indicate your (non) support as this is not a vote.

Thanks!

Jim, Bruno & Joel




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12.0pt;line-height:150%;font-family:&quot;MTN Brighter Sans&quot;;mso-farea=
st-language:ZH-CN">Dear WG<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"line-height:150%"><span style=3D"font-size:=
12.0pt;line-height:150%;font-family:&quot;MTN Brighter Sans&quot;;mso-farea=
st-language:ZH-CN">I support the adoption of this document. It describes a =
useful mechanism to build multiple SR based virtual
 networks for different purposes.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;MTN Brighter Sans L=
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ne;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class=3D"MsoNormal"><b>From:</b> spring &lt;spring-bounces@ietf.org&gt; =
<b>On Behalf Of
</b>James Guichard<br>
<b>Sent:</b> Wednesday, January 27, 2021 12:47 PM<br>
<b>To:</b> spring@ietf.org<br>
<b>Cc:</b> spring-chairs@ietf.org<br>
<b>Subject:</b> [spring] WG Adoption Call for draft-dong-spring-sr-for-enha=
nced-vpn<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Dear WG:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">This message starts a 2 week WG adoption call for <a=
 href=3D"https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced=
-vpn/">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">After review of the document please indicate support=
 (or not) for WG adoption to the mailing list and if you are willing to wor=
k on the document, please state this explicitly. This gives the chairs an i=
ndication of the energy level of people
 in the working group willing to work on this document. Please also provide=
 comments/reasons for your support (or lack thereof) as this is a stronger =
way to indicate your (non) support as this is not a vote.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks!<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Jim, Bruno &amp; Joel<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>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
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--_000_AM0PR02MB36810F666129EAB096455B6EDB8D9AM0PR02MB3681eurp_--

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Date: Wed, 10 Feb 2021 19:31:26 +0100
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Hi all,

acknowledging the scalability concerns discussed on the list, I think there
could be some scenarios that could be yet benefited from this approach. So
I'm in favor of supporting the adoption of the document.

Best regards

Luis


El mi=C3=A9, 27 ene 2021 a las 12:47, James Guichard (<
james.n.guichard@futurewei.com>) escribi=C3=B3:

> Dear WG:
>
>
>
> This message starts a 2 week WG adoption call for
> https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/
> ending February 10th 2021.
>
>
>
> After review of the document please indicate support (or not) for WG
> adoption to the mailing list and if you are willing to work on the
> document, please state this explicitly. This gives the chairs an indicati=
on
> of the energy level of people in the working group willing to work on thi=
s
> document. Please also provide comments/reasons for your support (or lack
> thereof) as this is a stronger way to indicate your (non) support as this
> is not a vote.
>
>
>
> Thanks!
>
>
>
> Jim, Bruno & Joel
>
>
>
>
>
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
>


--=20
___________________________________________
Luis M. Contreras
contreras.ietf@gmail.com
luismiguel.contrerasmurillo@telefonica.com
Global CTIO unit / Telefonica

--00000000000017129f05baff9d3a
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<div dir=3D"ltr">Hi all,<div><br></div><div>acknowledging the scalability c=
oncerns discussed on the list, I think there could be some scenarios that c=
ould be=20

yet=20

benefited from this approach. So I&#39;m in favor of supporting the adoptio=
n of the document.</div><div><br></div><div>Best regards</div><div><br></di=
v><div>Luis</div><div>=C2=A0<br></div></div><br><div class=3D"gmail_quote">=
<div dir=3D"ltr" class=3D"gmail_attr">El mi=C3=A9, 27 ene 2021 a las 12:47,=
 James Guichard (&lt;<a href=3D"mailto:james.n.guichard@futurewei.com">jame=
s.n.guichard@futurewei.com</a>&gt;) escribi=C3=B3:<br></div><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid =
rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-US">
<div class=3D"gmail-m_-67178099818313468WordSection1">
<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 message starts a 2 week WG adoption call for <a=
 href=3D"https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced=
-vpn/" target=3D"_blank">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">After review of the document please indicate support=
 (or not) for WG adoption to the mailing list and if you are willing to wor=
k on the document, please state this explicitly. This gives the chairs an i=
ndication of the energy level of people
 in the working group willing to work on this document. Please also provide=
 comments/reasons for your support (or lack thereof) as this is a stronger =
way to indicate your (non) support as this is not a vote.<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, Bruno &amp; Joel<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>

_______________________________________________<br>
spring mailing list<br>
<a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a><br=
>
<a href=3D"https://www.ietf.org/mailman/listinfo/spring" rel=3D"noreferrer"=
 target=3D"_blank">https://www.ietf.org/mailman/listinfo/spring</a><br>
</blockquote></div><br clear=3D"all"><div><br></div>-- <br><div dir=3D"ltr"=
 class=3D"gmail_signature"><div dir=3D"ltr"><div>__________________________=
_________________</div><div>Luis M. Contreras<br></div><div><a href=3D"mail=
to:contreras.ietf@gmail.com" target=3D"_blank">contreras.ietf@gmail.com</a>=
=C2=A0</div><div><a href=3D"mailto:luismiguel.contrerasmurillo@telefonica.c=
om" target=3D"_blank">luismiguel.contrerasmurillo@telefonica.com</a></div><=
div>Global CTIO unit / Telefonica</div></div></div>

--00000000000017129f05baff9d3a--


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Subject: [spring] I-D Action: draft-gandhi-spring-stamp-srpm-05.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 Source Packet Routing in Networking WG of the IETF.

        Title           : Performance Measurement Using Simple TWAMP (STAMP) for Segment Routing Networks
        Authors         : Rakesh Gandhi
                          Clarence Filsfils
                          Daniel Voyer
                          Mach(Guoyi) Chen
                          Bart Janssens
	Filename        : draft-gandhi-spring-stamp-srpm-05.txt
	Pages           : 20
	Date            : 2021-02-10

Abstract:
   Segment Routing (SR) leverages the source routing paradigm.  SR is
   applicable to both Multiprotocol Label Switching (SR-MPLS) and IPv6
   (SRv6) data planes.  This document describes procedures for
   Performance Measurement in SR networks using the mechanisms defined
   in RFC 8762 (Simple Two-Way Active Measurement Protocol (STAMP)) and
   its optional extensions defined in RFC 8972 and draft-gandhi-ippm-
   stamp-srpm.  The procedure described is applicable to SR-MPLS and
   SRv6 data planes and is used for both links and end-to-end SR paths
   including SR Policies.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-gandhi-spring-stamp-srpm/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-gandhi-spring-stamp-srpm-05
https://datatracker.ietf.org/doc/html/draft-gandhi-spring-stamp-srpm-05

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-gandhi-spring-stamp-srpm-05


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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Hi WG,

This revision has following updates:

   - Draft status is Informational
   - Replaced TWAMP Light draft with STAMP draft
   - Updated terminology to align with STAMP
   - Added (test) packet loss section
   - Removed stand-alone direct measurement messages
   - Removed text for IPv6/UDP test packet with zero checksum
   - Various editorial changes to address review comments



Many thanks for providing review comments.

Welcome your review on the latest updates.



Thanks,

Rakesh (for the authors)

On Wed, Feb 10, 2021 at 5:51 PM <internet-drafts@ietf.org> wrote:

>
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the Source Packet Routing in Networking WG of
> the IETF.
>
>         Title           : Performance Measurement Using Simple TWAMP
> (STAMP) for Segment Routing Networks
>         Authors         : Rakesh Gandhi
>                           Clarence Filsfils
>                           Daniel Voyer
>                           Mach(Guoyi) Chen
>                           Bart Janssens
>         Filename        : draft-gandhi-spring-stamp-srpm-05.txt
>         Pages           : 20
>         Date            : 2021-02-10
>
> Abstract:
>    Segment Routing (SR) leverages the source routing paradigm.  SR is
>    applicable to both Multiprotocol Label Switching (SR-MPLS) and IPv6
>    (SRv6) data planes.  This document describes procedures for
>    Performance Measurement in SR networks using the mechanisms defined
>    in RFC 8762 (Simple Two-Way Active Measurement Protocol (STAMP)) and
>    its optional extensions defined in RFC 8972 and draft-gandhi-ippm-
>    stamp-srpm.  The procedure described is applicable to SR-MPLS and
>    SRv6 data planes and is used for both links and end-to-end SR paths
>    including SR Policies.
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-gandhi-spring-stamp-srpm/
>
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-gandhi-spring-stamp-srpm-05
> https://datatracker.ietf.org/doc/html/draft-gandhi-spring-stamp-srpm-05
>
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-gandhi-spring-stamp-srpm-05
>
>
> 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/
>
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
>

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<div dir=3D"ltr"><div dir=3D"ltr">


















<p class=3D"MsoNormal" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span>Hi
WG,<span></span></span></p>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span>This
revision has following updates:<span></span></span></p>



<ul style=3D"margin-top:0cm;margin-bottom:0cm" type=3D"disc"><li class=3D"g=
mail-MsoListParagraph" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span lang=3D"EN-US">Draft status is Information=
al</span><span><span></span></span></li><li class=3D"gmail-MsoListParagraph=
" style=3D"margin:0cm;font-size:12pt;font-family:&quot;Calibri&quot;,sans-s=
erif"><span lang=3D"EN-US">Replaced TWAMP Light draft with STAMP draft</spa=
n><span><span></span></span></li><li class=3D"gmail-MsoListParagraph" style=
=3D"margin:0cm;font-size:12pt;font-family:&quot;Calibri&quot;,sans-serif"><=
span lang=3D"EN-US">Updated terminology to align with STAMP</span><span><sp=
an></span></span></li><li class=3D"gmail-MsoListParagraph" style=3D"margin:=
0cm;font-size:12pt;font-family:&quot;Calibri&quot;,sans-serif"><span lang=
=3D"EN-US">Added (test) packet loss section</span><span><span></span></span=
></li><li class=3D"gmail-MsoListParagraph" style=3D"margin:0cm;font-size:12=
pt;font-family:&quot;Calibri&quot;,sans-serif"><span lang=3D"EN-US">Removed=
 stand-alone direct measurement messages</span><span><span></span></span></=
li><li class=3D"gmail-MsoListParagraph" style=3D"margin:0cm;font-size:12pt;=
font-family:&quot;Calibri&quot;,sans-serif"><span lang=3D"EN-US">Removed te=
xt for IPv6/UDP test packet with zero
     checksum</span><span><span></span></span></li><li class=3D"gmail-MsoLi=
stParagraph" style=3D"margin:0cm;font-size:12pt;font-family:&quot;Calibri&q=
uot;,sans-serif"><span lang=3D"EN-US">Various editorial changes to address =
review
     comments</span><span><span></span></span></li></ul>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span><span>=C2=A0</span></span></p>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span>Many
thanks for providing review comments. <span></span></span></p>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span>Welcome
your review on the latest updates.<span></span></span></p>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span><span>=C2=A0</span></span></p>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span>Thanks,<span></span></span></p>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span>Rakesh
(for the authors)<span></span></span></p>





</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_=
attr">On Wed, Feb 10, 2021 at 5:51 PM &lt;<a href=3D"mailto:internet-drafts=
@ietf.org">internet-drafts@ietf.org</a>&gt; wrote:<br></div><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid =
rgb(204,204,204);padding-left:1ex"><br>
A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.<br>
This draft is a work item of the Source Packet Routing in Networking WG of =
the IETF.<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Title=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0:=
 Performance Measurement Using Simple TWAMP (STAMP) for Segment Routing Net=
works<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Authors=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0: Rake=
sh Gandhi<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 Clarence Filsfils<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 Daniel Voyer<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 Mach(Guoyi) Chen<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 Bart Janssens<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Filename=C2=A0 =C2=A0 =C2=A0 =C2=A0 : draft-gan=
dhi-spring-stamp-srpm-05.txt<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Pages=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0:=
 20<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Date=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 :=
 2021-02-10<br>
<br>
Abstract:<br>
=C2=A0 =C2=A0Segment Routing (SR) leverages the source routing paradigm.=C2=
=A0 SR is<br>
=C2=A0 =C2=A0applicable to both Multiprotocol Label Switching (SR-MPLS) and=
 IPv6<br>
=C2=A0 =C2=A0(SRv6) data planes.=C2=A0 This document describes procedures f=
or<br>
=C2=A0 =C2=A0Performance Measurement in SR networks using the mechanisms de=
fined<br>
=C2=A0 =C2=A0in RFC 8762 (Simple Two-Way Active Measurement Protocol (STAMP=
)) and<br>
=C2=A0 =C2=A0its optional extensions defined in RFC 8972 and draft-gandhi-i=
ppm-<br>
=C2=A0 =C2=A0stamp-srpm.=C2=A0 The procedure described is applicable to SR-=
MPLS and<br>
=C2=A0 =C2=A0SRv6 data planes and is used for both links and end-to-end SR =
paths<br>
=C2=A0 =C2=A0including SR Policies.<br>
<br>
<br>
The IETF datatracker status page for this draft is:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-gandhi-spring-stamp-srpm/=
" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc/dra=
ft-gandhi-spring-stamp-srpm/</a><br>
<br>
There are also htmlized versions available at:<br>
<a href=3D"https://tools.ietf.org/html/draft-gandhi-spring-stamp-srpm-05" r=
el=3D"noreferrer" target=3D"_blank">https://tools.ietf.org/html/draft-gandh=
i-spring-stamp-srpm-05</a><br>
<a href=3D"https://datatracker.ietf.org/doc/html/draft-gandhi-spring-stamp-=
srpm-05" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/=
doc/html/draft-gandhi-spring-stamp-srpm-05</a><br>
<br>
A diff from the previous version is available at:<br>
<a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-gandhi-spring-stamp-sr=
pm-05" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/rfcdiff?ur=
l2=3Ddraft-gandhi-spring-stamp-srpm-05</a><br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n<br>
until the htmlized version and diff are available at <a href=3D"http://tool=
s.ietf.org" rel=3D"noreferrer" target=3D"_blank">tools.ietf.org</a>.<br>
<br>
Internet-Drafts are also available by anonymous FTP at:<br>
<a href=3D"ftp://ftp.ietf.org/internet-drafts/" rel=3D"noreferrer" target=
=3D"_blank">ftp://ftp.ietf.org/internet-drafts/</a><br>
<br>
<br>
_______________________________________________<br>
spring mailing list<br>
<a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a><br=
>
<a href=3D"https://www.ietf.org/mailman/listinfo/spring" rel=3D"noreferrer"=
 target=3D"_blank">https://www.ietf.org/mailman/listinfo/spring</a><br>
</blockquote></div>

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From: Rakesh Gandhi <rgandhi.ietf@gmail.com>
Date: Wed, 10 Feb 2021 19:51:49 -0500
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Subject: Re: [spring] FW: New Version Notification for draft-gandhi-spring-sr-enhanced-plm-04.txt
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Content-Type: text/plain; charset="UTF-8"

Hi WG,

This revision has the following updates:

   - Updated terminology
   - Added authentication mode
   - Added SRv6 Timestamp Endpoint assignment and Node Capability
   - Added synthetic packet loss
   - Updated IANA section
   - Various editorial changes



Welcome your review on the latest updates.



Thanks,

Rakesh (for the authors)



On Wed, Feb 10, 2021 at 7:46 PM Rakesh Gandhi (rgandhi) <rgandhi@cisco.com>
wrote:

>
>
>
>
> *From: *internet-drafts@ietf.org <internet-drafts@ietf.org>
> *Date: *Tuesday, February 9, 2021 at 5:06 PM
> *To: *Clarence Filsfils (cfilsfil) <cfilsfil@cisco.com>, Moses Nagarajah <
> Moses.Nagarajah@team.telstra.com>, Moses Nagarajah <
> Moses.Nagarajah@team.telstra.com>, Navin Vaghamshi <
> Navin.Vaghamshi@ril.com>, Navin Vaghamshi <Navin.Vaghamshi@ril.com>,
> Rakesh Gandhi (rgandhi) <rgandhi@cisco.com>, Richard Foote <
> footer.foote@nokia.com>
> *Subject: *New Version Notification for
> draft-gandhi-spring-sr-enhanced-plm-04.txt
>
>
> A new version of I-D, draft-gandhi-spring-sr-enhanced-plm-04.txt
> has been successfully submitted by Rakesh Gandhi and posted to the
> IETF repository.
>
> Name:           draft-gandhi-spring-sr-enhanced-plm
> Revision:       04
> Title:          Enhanced Performance and Liveness Monitoring in Segment
> Routing Networks
> Document date:  2021-02-09
> Group:          Individual Submission
> Pages:          20
> URL:
> https://www.ietf.org/archive/id/draft-gandhi-spring-sr-enhanced-plm-04.txt
> Status:
> https://datatracker.ietf.org/doc/draft-gandhi-spring-sr-enhanced-plm/
> Htmlized:
> https://datatracker.ietf.org/doc/html/draft-gandhi-spring-sr-enhanced-plm
> Htmlized:
> https://tools.ietf.org/html/draft-gandhi-spring-sr-enhanced-plm-04
> Diff:
> https://www.ietf.org/rfcdiff?url2=draft-gandhi-spring-sr-enhanced-plm-04
>
> Abstract:
>    Segment Routing (SR) leverages the source routing paradigm.  SR is
>    applicable to both Multiprotocol Label Switching (SR-MPLS) and IPv6
>    (SRv6) data planes.  This document defines procedures for Enhanced
>    Performance and Liveness Monitoring (PLM) for end-to-end SR paths
>    including SR Policies for both SR-MPLS and SRv6 data planes, those
>    reduce the deployment and operational complexities in a network.
>
>
>
>
>
> 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.
>
> The IETF Secretariat
>
>

--00000000000066a65305bb04ed85
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">


















<p class=3D"MsoNormal" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span style=3D"color:black">Hi
WG,<span></span></span></p>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span style=3D"color:black">This
revision has the following updates:<span></span></span></p>



<ul style=3D"margin-top:0cm;margin-bottom:0cm" type=3D"disc"><li class=3D"g=
mail-MsoListParagraph" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span>Updated
     terminology <span></span></span></li><li class=3D"gmail-MsoListParagra=
ph" style=3D"margin:0cm;font-size:12pt;font-family:&quot;Calibri&quot;,sans=
-serif"><span>Added
     authentication mode<span></span></span></li><li class=3D"gmail-MsoList=
Paragraph" style=3D"margin:0cm;font-size:12pt;font-family:&quot;Calibri&quo=
t;,sans-serif"><span>Added
     SRv6 Timestamp Endpoint assignment and Node Capability<span></span></s=
pan></li><li class=3D"gmail-MsoListParagraph" style=3D"margin:0cm;font-size=
:12pt;font-family:&quot;Calibri&quot;,sans-serif"><span>Added
     synthetic packet loss<span></span></span></li><li class=3D"gmail-MsoLi=
stParagraph" style=3D"margin:0cm;font-size:12pt;font-family:&quot;Calibri&q=
uot;,sans-serif"><span>Updated
     IANA section<span></span></span></li><li class=3D"gmail-MsoListParagra=
ph" style=3D"margin:0cm;font-size:12pt;font-family:&quot;Calibri&quot;,sans=
-serif"><span>Various
     editorial changes<span></span></span></li></ul>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span><span>=C2=A0</span></span></p>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span style=3D"color:black">Welcome
your review on the latest updates.<span></span></span></p>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span style=3D"color:black"><span>=C2=A0</span><=
/span></p>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span style=3D"color:black">Thanks,<span></span>=
</span></p>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span style=3D"color:black">Rakesh
(for the authors)<span></span></span></p>

<p class=3D"MsoNormal" style=3D"margin:0cm;font-size:12pt;font-family:&quot=
;Calibri&quot;,sans-serif"><span><span>=C2=A0</span></span></p>





</div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">=
On Wed, Feb 10, 2021 at 7:46 PM Rakesh Gandhi (rgandhi) &lt;<a href=3D"mail=
to:rgandhi@cisco.com">rgandhi@cisco.com</a>&gt; wrote:<br></div><blockquote=
 class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px so=
lid rgb(204,204,204);padding-left:1ex">





<div style=3D"overflow-wrap: break-word;" lang=3D"EN-CA">
<div class=3D"gmail-m_-8625352328530316533WordSection1">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border-color:rgb(181,196,223) currentcolor currentcolor;borde=
r-style:solid none none;border-width:1pt medium medium;padding:3pt 0cm 0cm"=
>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><b><span style=3D"font-=
size:12pt;color:black">From:
</span></b><span style=3D"font-size:12pt;color:black"><a href=3D"mailto:int=
ernet-drafts@ietf.org" target=3D"_blank">internet-drafts@ietf.org</a> &lt;<=
a href=3D"mailto:internet-drafts@ietf.org" target=3D"_blank">internet-draft=
s@ietf.org</a>&gt;<br>
<b>Date: </b>Tuesday, February 9, 2021 at 5:06 PM<br>
<b>To: </b>Clarence Filsfils (cfilsfil) &lt;<a href=3D"mailto:cfilsfil@cisc=
o.com" target=3D"_blank">cfilsfil@cisco.com</a>&gt;, Moses Nagarajah &lt;<a=
 href=3D"mailto:Moses.Nagarajah@team.telstra.com" target=3D"_blank">Moses.N=
agarajah@team.telstra.com</a>&gt;, Moses Nagarajah &lt;<a href=3D"mailto:Mo=
ses.Nagarajah@team.telstra.com" target=3D"_blank">Moses.Nagarajah@team.tels=
tra.com</a>&gt;, Navin Vaghamshi &lt;<a href=3D"mailto:Navin.Vaghamshi@ril.=
com" target=3D"_blank">Navin.Vaghamshi@ril.com</a>&gt;, Navin Vaghamshi &lt=
;<a href=3D"mailto:Navin.Vaghamshi@ril.com" target=3D"_blank">Navin.Vaghams=
hi@ril.com</a>&gt;, Rakesh
 Gandhi (rgandhi) &lt;<a href=3D"mailto:rgandhi@cisco.com" target=3D"_blank=
">rgandhi@cisco.com</a>&gt;, Richard Foote &lt;<a href=3D"mailto:footer.foo=
te@nokia.com" target=3D"_blank">footer.foote@nokia.com</a>&gt;<br>
<b>Subject: </b>New Version Notification for draft-gandhi-spring-sr-enhance=
d-plm-04.txt<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><br>
A new version of I-D, draft-gandhi-spring-sr-enhanced-plm-04.txt<br>
has been successfully submitted by Rakesh Gandhi and posted to the<br>
IETF repository.<br>
<br>
Name:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 draft-gan=
dhi-spring-sr-enhanced-plm<br>
Revision:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 04<br>
Title:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Enhanced Perfo=
rmance and Liveness Monitoring in Segment Routing Networks<br>
Document date:=C2=A0 2021-02-09<br>
Group:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Individual Sub=
mission<br>
Pages:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 20<br>
URL:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 <a h=
ref=3D"https://www.ietf.org/archive/id/draft-gandhi-spring-sr-enhanced-plm-=
04.txt" target=3D"_blank">
https://www.ietf.org/archive/id/draft-gandhi-spring-sr-enhanced-plm-04.txt<=
/a><br>
Status:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 <a href=3D"https://=
datatracker.ietf.org/doc/draft-gandhi-spring-sr-enhanced-plm/" target=3D"_b=
lank">
https://datatracker.ietf.org/doc/draft-gandhi-spring-sr-enhanced-plm/</a><b=
r>
Htmlized:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 <a href=3D"https://datatracke=
r.ietf.org/doc/html/draft-gandhi-spring-sr-enhanced-plm" target=3D"_blank">
https://datatracker.ietf.org/doc/html/draft-gandhi-spring-sr-enhanced-plm</=
a><br>
Htmlized:=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 <a href=3D"https://tools.ietf=
.org/html/draft-gandhi-spring-sr-enhanced-plm-04" target=3D"_blank">
https://tools.ietf.org/html/draft-gandhi-spring-sr-enhanced-plm-04</a><br>
Diff:=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/rfcdiff?url2=3Ddraft-gandhi-spring-sr-enhanced-plm=
-04" target=3D"_blank">
https://www.ietf.org/rfcdiff?url2=3Ddraft-gandhi-spring-sr-enhanced-plm-04<=
/a><br>
<br>
Abstract:<br>
=C2=A0=C2=A0 Segment Routing (SR) leverages the source routing paradigm.=C2=
=A0 SR is<br>
=C2=A0=C2=A0 applicable to both Multiprotocol Label Switching (SR-MPLS) and=
 IPv6<br>
=C2=A0=C2=A0 (SRv6) data planes.=C2=A0 This document defines procedures for=
 Enhanced<br>
=C2=A0=C2=A0 Performance and Liveness Monitoring (PLM) for end-to-end SR pa=
ths<br>
=C2=A0=C2=A0 including SR Policies for both SR-MPLS and SRv6 data planes, t=
hose<br>
=C2=A0=C2=A0 reduce the deployment and operational complexities in a networ=
k.<br>
<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
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Subject: [spring] Completion of WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Dear WG:

This email ends the 2 week WG adoption call for https://datatracker.ietf.or=
g/doc/draft-dong-spring-sr-for-enhanced-vpn/<https://nam11.safelinks.protec=
tion.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-do=
ng-spring-sr-for-enhanced-vpn%2F&data=3D04%7C01%7Cjames.n.guichard%40future=
wei.com%7C9be5d4dab908405837f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fe=
dc%7C1%7C0%7C637486593751248808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDA=
iLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DAMf3lLJFjUUx=
SJLfQLS2HWZyD8KitGvrFm7n9CpY80Y%3D&reserved=3D0>.

Having reviewed all of the responses, the chairs believe that enough suppor=
t was received to adopt this document into the WG. However, while the docum=
ent is informational in nature, it does have a normative dependency on http=
s://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segments/<htt=
ps://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracke=
r.ietf.org%2Fdoc%2Fdraft-ietf-spring-resource-aware-segments%2F&data=3D04%7=
C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908405837f408d8ceadef29%7=
C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593751248808%7CUnknown%7C=
TWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0=
%3D%7C1000&sdata=3Dtco%2FwwumvVZ%2FbtvVutDh8Dzl3PseJM9X2Q%2FUhXvfR8Q%3D&res=
erved=3D0> which will need to successfully complete WG LC before this docum=
ent will be able to progress from the WG queue. The chairs feel that more w=
ork is necessary in terms of definition and interoperability of resource-aw=
are SIDs. In addition several comments were received during the adoption ca=
ll that will need to be addressed as the document progresses through the WG=
 process. Further, the chairs would like to make it clear that adopting an =
informational document that proposes a particular solution which utilizes r=
esource-aware SIDs does *not* preclude future adoption of other documents w=
hich propose a different solution if the trade-offs are significantly diffe=
rent.

Authors, please resubmit the document as draft-spring-sr-for-enhanced-vpn-0=
0 and also provide explicit confirmation as to whether you are aware of any=
 IPR related to this document.

Regards,

Jim, Joel & Bruno


From: James Guichard <james.n.guichard@futurewei.com>
Sent: Wednesday, January 27, 2021 5:47 AM
To: spring@ietf.org
Cc: spring-chairs@ietf.org
Subject: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn

Dear WG:

This message starts a 2 week WG adoption call for https://datatracker.ietf.=
org/doc/draft-dong-spring-sr-for-enhanced-vpn/<https://nam11.safelinks.prot=
ection.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-=
dong-spring-sr-for-enhanced-vpn%2F&data=3D04%7C01%7Cjames.n.guichard%40futu=
rewei.com%7C4aefbabc297942dc563408d8c2b93697%7C0fee8ff2a3b240189c753a1d5591=
fedc%7C1%7C0%7C637473448047191786%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwM=
DAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DCW%2BREIvA=
YGW5RqEptdCZk4Q%2Ba1%2F4ta1XOa%2FzwEQjq1I%3D&reserved=3D0> ending February =
10th 2021.

After review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, plea=
se state this explicitly. This gives the chairs an indication of the energy=
 level of people in the working group willing to work on this document. Ple=
ase also provide comments/reasons for your support (or lack thereof) as thi=
s is a stronger way to indicate your (non) support as this is not a vote.

Thanks!

Jim, Bruno & Joel




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<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">This email ends the 2 week WG adoption call for <a h=
ref=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2F=
datatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&amp;d=
ata=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908405837f408d8=
ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593751248808%7C=
Unknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiL=
CJXVCI6Mn0%3D%7C1000&amp;sdata=3DAMf3lLJFjUUxSJLfQLS2HWZyD8KitGvrFm7n9CpY80=
Y%3D&amp;reserved=3D0">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
. <o:p>
</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Having reviewed all of the responses, the chairs bel=
ieve that enough support was received to adopt this document into the WG. H=
owever, while the document is informational in nature, it does have a norma=
tive dependency on
<a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2=
F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-spring-resource-aware-segments%=
2F&amp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab9084058=
37f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C6374865937512=
48808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6I=
k1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3Dtco%2FwwumvVZ%2FbtvVutDh8Dzl3PseJM=
9X2Q%2FUhXvfR8Q%3D&amp;reserved=3D0">
https://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segments/=
</a> which will need to successfully complete WG LC before this document wi=
ll be able to progress from the WG queue. The chairs feel that more work is=
 necessary in terms of definition
 and interoperability of resource-aware SIDs. In addition several comments =
were received during the adoption call that will need to be addressed as th=
e document progresses through the WG process. Further, the chairs would lik=
e to make it clear that adopting
 an informational document that proposes a particular solution which utiliz=
es resource-aware SIDs does *<b>not</b>* preclude future adoption of other =
documents which propose a different solution if the trade-offs are signific=
antly different.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Authors, please resubmit the document as draft-sprin=
g-sr-for-enhanced-vpn-00 and also provide explicit confirmation as to wheth=
er you are aware of any IPR related to this document.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Regards,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Jim, Joel &amp; Bruno<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>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> James Guichard &lt;james.n.guichard@fut=
urewei.com&gt;
<br>
<b>Sent:</b> Wednesday, January 27, 2021 5:47 AM<br>
<b>To:</b> spring@ietf.org<br>
<b>Cc:</b> spring-chairs@ietf.org<br>
<b>Subject:</b> WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn<=
o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Dear WG:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">This message starts a 2 week WG adoption call for <a=
 href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%=
2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&amp=
;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C4aefbabc297942dc563408=
d8c2b93697%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637473448047191786%=
7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWw=
iLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DCW%2BREIvAYGW5RqEptdCZk4Q%2Ba1%2F4ta1XOa=
%2FzwEQjq1I%3D&amp;reserved=3D0">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">After review of the document please indicate support=
 (or not) for WG adoption to the mailing list and if you are willing to wor=
k on the document, please state this explicitly. This gives the chairs an i=
ndication of the energy level of people
 in the working group willing to work on this document. Please also provide=
 comments/reasons for your support (or lack thereof) as this is a stronger =
way to indicate your (non) support as this is not a vote.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks!<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Jim, Bruno &amp; Joel<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>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</body>
</html>

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From: Gyan Mishra <hayabusagsm@gmail.com>
Date: Fri, 12 Feb 2021 03:54:54 -0500
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To: Jeff Tantsura <jefftant.ietf@gmail.com>
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Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-srv6-end-dtm-01.txt
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Hi Ron

This is an interesting  SR-MPLS to SRv6 interworking concept.

For an end to end LSP where you end up doing a translation on a border node
doing the interworking pop of MPLS label stack and impose of SRv6 IPv6
header in one direction and POP of SRv6 IPv6 header and impose of MPLS
label stack in the other direction, how does the LSP get stitched from
ingress PE to egress PE FEC destination if the intermediate node in the
path is a P node doing the translation interworking.  I think if the
translation interworking node was an egress PE that is doing the ASBR
function handoff seems plausible, but if it=E2=80=99s a P node as it appear=
s in
your example how would the LSP get stitched end to end.

Could this same concept be used for MPLS LDP fo SRv6 interworking as well.

Kind Regards

Gyan

On Tue, Feb 9, 2021 at 8:00 PM Jeff Tantsura <jefftant.ietf@gmail.com>
wrote:

> Thanks Ron, couldn=E2=80=99t have explained it better.
>
> Prefix SID (and the prefix associated with it) could be reachable over an=
y
> interface participating in the topology,  depending on that topology
> structure, with topology changes, outgoing interface might change as well=
.
> Hence the outgoing interface is a runtime property of the top SID.
>
> Loa - does this clarify?
>
> Cheers,
> Jeff
> On Feb 9, 2021, 12:35 PM -0800, Ron Bonica <rbonica@juniper.net>, wrote:
>
> Loa,
>
> I think that Jeff means to say that " A SID instance is associated with
> SR-MPLS label stack. A label stack entry can be associated with a next ho=
p.
> A recursive lookup may be required to derive the next hop from the topmos=
t
> label stack entry."
>
> Ron
>
>
>
> Juniper Business Use Only
>
> -----Original Message-----
> From: Loa Andersson <loa@pi.nu>
> Sent: Monday, February 8, 2021 11:51 PM
> To: Jeff Tantsura <jefftant.ietf@gmail.com>; Ron Bonica <
> rbonica@juniper.net>
> Cc: spring@ietf.org
> Subject: Re: [spring] FW: New Version Notification for
> draft-bonica-spring-srv6-end-dtm-01.txt
>
> [External Email. Be cautious of content]
>
>
> Jeff,
>
>
> On 08/02/2021 14:51, Jeff Tantsura wrote:
>
> Hi Ron,
>
> Very useful document, thanks!
>
> Question wrt processing:
> As described in the draft:
> =E2=80=9CA SID instance is associated with SR-MPLS label stack and outgoi=
ng
> interface.=E2=80=9D
>
> I=E2=80=99d think that outgoing interface would be recursively resolved b=
ased on
> the top SID (and could change based on topological semantics).
> Could you please elaborate?
>
>
> What exactly do yo mean by "recursively"?
>
> /Loa
>
>
> Thanks!
>
>
> Cheers,
> Jeff
>
> On Feb 7, 2021, at 08:46, Ron Bonica <rbonica=3D40juniper.net@dmarc.ietf.=
org>
> wrote:
>
> =EF=BB=BF
> Please review and comment
>
>
> Juniper Business Use Only
>
> -----Original Message-----
> From: internet-drafts@ietf.org <internet-drafts@ietf.org>
> Sent: Sunday, February 7, 2021 11:41 AM
> To: Greg Mirsky <gregimirsky@gmail.com>; Peng Shaofu
> <peng.shaofu@zte.com.cn>; Ron Bonica <rbonica@juniper.net>; Shaofu
> Peng <peng.shaofu@zte.com.cn>; Shraddha Hegde
> <shraddha@juniper.net>; EXT- zhang.zheng@zte.com.cn
> <zhang.zheng@zte.com.cn>
> Subject: New Version Notification for
> draft-bonica-spring-srv6-end-dtm-01.txt
>
> [External Email. Be cautious of content]
>
>
> A new version of I-D, draft-bonica-spring-srv6-end-dtm-01.txt
> has been successfully submitted by Ron Bonica and posted to the IETF
> repository.
>
> Name: draft-bonica-spring-srv6-end-dtm
> Revision: 01
> Title: The SRv6 END.DTM Segment Type
> Document date: 2021-02-07
> Group: Individual Submission
> Pages: 7
> URL:
> https://urldefense.com/v3/__https://www.ietf.org/archive/id/draft-bonica-=
spring-srv6-end-dtm-01.txt__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9X=
g2bqsA3kb6qY2F-3qbYIFrhF8F9ybUH5$
> Status:
> https://urldefense.com/v3/__https://datatracker.ietf.org/doc/draft-b
> onica-spring-srv6-end-dtm__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8ap
> yYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8Oytsvgj$
> Htmlized:
> https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/draft-b=
onica-spring-srv6-end-dtm__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg=
2bqsA3kb6qY2F-3qbYIFrhF8F2zaLIO$
> Htmlized:
> https://urldefense.com/v3/__https://tools.ietf.org/html/draft-bonica-spri=
ng-srv6-end-dtm-01__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3k=
b6qY2F-3qbYIFrhF8DZVjUN4$
> Diff:
> https://urldefense.com/v3/__https://www.ietf.org/rfcdiff?url2=3Ddraft-
> bonica-spring-srv6-end-dtm-01__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4t
> F8apyYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8CJWOgzv$
>
> Abstract:
> This document describes a new SRv6 segment type, called END.DTM. The
> END.DTM segment type supports inter-working between SRv6 and SR-MPLS.
> Like any segment type, END.DTM contains a function and arguments.
> The function causes the processing SRv6 node to remove an SRv6 header
> and impose an SR-MPLS label stack. The arguments determine MPLS-
> label stack contents.
>
>
>
>
> 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.
>
> The IETF Secretariat
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/spr
> ing__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3kb6qY2F-3q
> bYIFrhF8PggLsaR$
>
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/spri
> ng__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3kb6qY2F-3qbY
> IFrhF8PggLsaR$
>
>
> --
>
> Loa Andersson email: loa@pi.nu
> Senior MPLS Expert loa.pi.nu@gmail.com
> Bronze Dragon Consulting phone: +46 739 81 21 64
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
>
--=20

<http://www.verizon.com/>

*Gyan Mishra*

*Network Solutions A**rchitect *



*M 301 502-134713101 Columbia Pike *Silver Spring, MD

--000000000000da4d7a05bb1fca83
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div><br></div><div dir=3D"auto">Hi Ron=C2=A0</div><div dir=3D"auto"><br></=
div><div dir=3D"auto">This is an interesting =C2=A0SR-MPLS to SRv6 interwor=
king concept.</div><div dir=3D"auto"><br></div><div dir=3D"auto">For an end=
 to end LSP where you end up doing a translation on a border node doing the=
 interworking pop of MPLS label stack and impose of SRv6 IPv6 header in one=
 direction and POP of SRv6 IPv6 header and impose of MPLS label stack in th=
e other direction, how does the LSP get stitched from ingress PE to egress =
PE FEC destination if the intermediate node in the path is a P node doing t=
he translation interworking.=C2=A0 I think if the translation interworking =
node was an egress PE that is doing the ASBR function handoff seems plausib=
le, but if it=E2=80=99s a P node as it appears in your example how would th=
e LSP get stitched end to end.</div><div dir=3D"auto"><br></div><div dir=3D=
"auto">Could this same concept be used for MPLS LDP fo SRv6 interworking as=
 well.</div><div dir=3D"auto"><br></div><div dir=3D"auto">Kind Regards=C2=
=A0</div><div dir=3D"auto"><br></div><div dir=3D"auto">Gyan</div><div><br><=
div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, Feb=
 9, 2021 at 8:00 PM Jeff Tantsura &lt;<a href=3D"mailto:jefftant.ietf@gmail=
.com">jefftant.ietf@gmail.com</a>&gt; wrote:<br></div><blockquote class=3D"=
gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border=
-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)">



<div>
<div name=3D"messageBodySection">
<div dir=3D"auto">Thanks Ron, couldn=E2=80=99t have explained it better.=C2=
=A0<br>
<br>
Prefix SID (and the prefix associated with it) could be reachable over any =
interface participating in the topology,=C2=A0=C2=A0depending on that topol=
ogy structure, with topology changes, outgoing interface might change as we=
ll. Hence the outgoing interface is a runtime property of the top SID.<br>
<br>
Loa - does this clarify?</div>
</div>
<div name=3D"messageSignatureSection"><br>
<div>Cheers,
<div>Jeff</div>
</div>
</div></div><div>
<div name=3D"messageReplySection">On Feb 9, 2021, 12:35 PM -0800, Ron Bonic=
a &lt;<a href=3D"mailto:rbonica@juniper.net" target=3D"_blank">rbonica@juni=
per.net</a>&gt;, wrote:<br>
<blockquote type=3D"cite" style=3D"border-left-width:thin;border-left-style=
:solid;margin:5px;padding-left:10px;border-left-color:grey">Loa,<br>
<br>
I think that Jeff means to say that &quot; A SID instance is associated wit=
h SR-MPLS label stack. A label stack entry can be associated with a next ho=
p. A recursive lookup may be required to derive the next hop from the topmo=
st label stack entry.&quot;<br>
<br>
Ron<br>
<br>
<br>
<br>
Juniper Business Use Only<br>
<br>
-----Original Message-----<br>
From: Loa Andersson &lt;<a href=3D"mailto:loa@pi.nu" target=3D"_blank">loa@=
pi.nu</a>&gt;<br>
Sent: Monday, February 8, 2021 11:51 PM<br>
To: Jeff Tantsura &lt;<a href=3D"mailto:jefftant.ietf@gmail.com" target=3D"=
_blank">jefftant.ietf@gmail.com</a>&gt;; Ron Bonica &lt;<a href=3D"mailto:r=
bonica@juniper.net" target=3D"_blank">rbonica@juniper.net</a>&gt;<br>
Cc: <a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a=
><br>
Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-=
srv6-end-dtm-01.txt<br>
<br>
[External Email. Be cautious of content]<br>
<br>
<br>
Jeff,<br>
<br>
<br>
On 08/02/2021 14:51, Jeff Tantsura wrote:<br>
<blockquote type=3D"cite">Hi Ron,<br>
<br>
Very useful document, thanks!<br>
<br>
Question wrt processing:<br>
As described in the draft:<br>
=E2=80=9CA SID instance is associated with SR-MPLS label stack and outgoing=
 interface.=E2=80=9D<br>
<br>
I=E2=80=99d think that outgoing interface would be recursively resolved bas=
ed on the top SID (and could change based on topological semantics).<br>
Could you please elaborate?<br></blockquote>
<br>
What exactly do yo mean by &quot;recursively&quot;?<br>
<br>
/Loa<br>
<blockquote type=3D"cite"><br>
Thanks!<br>
<br>
<br>
Cheers,<br>
Jeff<br>
<br>
<blockquote type=3D"cite">On Feb 7, 2021, at 08:46, Ron Bonica &lt;rbonica=
=3D<a href=3D"mailto:40juniper.net@dmarc.ietf.org" target=3D"_blank">40juni=
per.net@dmarc.ietf.org</a>&gt; wrote:<br>
<br>
=EF=BB=BF<br>
Please review and comment<br>
<br>
<br>
Juniper Business Use Only<br>
<br>
<blockquote type=3D"cite">-----Original Message-----<br>
From: <a href=3D"mailto:internet-drafts@ietf.org" target=3D"_blank">interne=
t-drafts@ietf.org</a> &lt;<a href=3D"mailto:internet-drafts@ietf.org" targe=
t=3D"_blank">internet-drafts@ietf.org</a>&gt;<br>
Sent: Sunday, February 7, 2021 11:41 AM<br>
To: Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_bla=
nk">gregimirsky@gmail.com</a>&gt;; Peng Shaofu<br>
&lt;<a href=3D"mailto:peng.shaofu@zte.com.cn" target=3D"_blank">peng.shaofu=
@zte.com.cn</a>&gt;; Ron Bonica &lt;<a href=3D"mailto:rbonica@juniper.net" =
target=3D"_blank">rbonica@juniper.net</a>&gt;; Shaofu<br>
Peng &lt;<a href=3D"mailto:peng.shaofu@zte.com.cn" target=3D"_blank">peng.s=
haofu@zte.com.cn</a>&gt;; Shraddha Hegde<br>
&lt;<a href=3D"mailto:shraddha@juniper.net" target=3D"_blank">shraddha@juni=
per.net</a>&gt;; EXT- <a href=3D"mailto:zhang.zheng@zte.com.cn" target=3D"_=
blank">zhang.zheng@zte.com.cn</a><br>
&lt;<a href=3D"mailto:zhang.zheng@zte.com.cn" target=3D"_blank">zhang.zheng=
@zte.com.cn</a>&gt;<br>
Subject: New Version Notification for<br>
draft-bonica-spring-srv6-end-dtm-01.txt<br>
<br>
[External Email. Be cautious of content]<br>
<br>
<br>
A new version of I-D, draft-bonica-spring-srv6-end-dtm-01.txt<br>
has been successfully submitted by Ron Bonica and posted to the IETF<br>
repository.<br>
<br>
Name: draft-bonica-spring-srv6-end-dtm<br>
Revision: 01<br>
Title: The SRv6 END.DTM Segment Type<br>
Document date: 2021-02-07<br>
Group: Individual Submission<br>
Pages: 7<br>
URL: <a href=3D"https://urldefense.com/v3/__https://www.ietf.org/archive/id=
/draft-bonica-spring-srv6-end-dtm-01.txt__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_=
vU4tF8apyYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8F9ybUH5$" target=3D"_blank">https://=
urldefense.com/v3/__https://www.ietf.org/archive/id/draft-bonica-spring-srv=
6-end-dtm-01.txt__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3kb6=
qY2F-3qbYIFrhF8F9ybUH5$</a><br>
Status:<br>
<a href=3D"https://urldefense.com/v3/__https://datatracker.ietf.org/doc/dra=
ft-b" target=3D"_blank">https://urldefense.com/v3/__https://datatracker.iet=
f.org/doc/draft-b</a><br>
onica-spring-srv6-end-dtm__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8ap<br>
yYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8Oytsvgj$<br>
Htmlized: <a href=3D"https://urldefense.com/v3/__https://datatracker.ietf.o=
rg/doc/html/draft-bonica-spring-srv6-end-dtm__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_x=
FwM_vU4tF8apyYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8F2zaLIO$" target=3D"_blank">http=
s://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/draft-bonica-=
spring-srv6-end-dtm__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3=
kb6qY2F-3qbYIFrhF8F2zaLIO$</a><br>
Htmlized: <a href=3D"https://urldefense.com/v3/__https://tools.ietf.org/htm=
l/draft-bonica-spring-srv6-end-dtm-01__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4=
tF8apyYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8DZVjUN4$" target=3D"_blank">https://url=
defense.com/v3/__https://tools.ietf.org/html/draft-bonica-spring-srv6-end-d=
tm-01__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3kb6qY2F-3qbYIF=
rhF8DZVjUN4$</a><br>
Diff:<br>
<a href=3D"https://urldefense.com/v3/__https://www.ietf.org/rfcdiff?url2=3D=
draft-" target=3D"_blank">https://urldefense.com/v3/__https://www.ietf.org/=
rfcdiff?url2=3Ddraft-</a><br>
bonica-spring-srv6-end-dtm-01__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4t<br>
F8apyYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8CJWOgzv$<br>
<br>
Abstract:<br>
This document describes a new SRv6 segment type, called END.DTM. The<br>
END.DTM segment type supports inter-working between SRv6 and SR-MPLS.<br>
Like any segment type, END.DTM contains a function and arguments.<br>
The function causes the processing SRv6 node to remove an SRv6 header<br>
and impose an SR-MPLS label stack. The arguments determine MPLS-<br>
label stack contents.<br>
<br>
<br>
<br>
<br>
Please note that it may take a couple of minutes from the time of<br>
submission until the htmlized version and diff are available at <a href=3D"=
http://tools.ietf.org" target=3D"_blank">tools.ietf.org</a>.<br>
<br>
The IETF Secretariat<br>
<br></blockquote>
_______________________________________________<br>
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<a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a><br=
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o/spr" target=3D"_blank">https://urldefense.com/v3/__https://www.ietf.org/m=
ailman/listinfo/spr</a><br>
ing__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3kb6qY2F-3q<br>
bYIFrhF8PggLsaR$<br></blockquote>
<br>
_______________________________________________<br>
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o/spri" target=3D"_blank">https://urldefense.com/v3/__https://www.ietf.org/=
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ng__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3kb6qY2F-3qbY<br>
IFrhF8PggLsaR$<br>
<br></blockquote>
<br>
--<br>
<br>
Loa Andersson email: <a href=3D"mailto:loa@pi.nu" target=3D"_blank">loa@pi.=
nu</a><br>
Senior MPLS Expert <a href=3D"mailto:loa.pi.nu@gmail.com" target=3D"_blank"=
>loa.pi.nu@gmail.com</a><br>
Bronze Dragon Consulting phone: +46 739 81 21 64<br></blockquote>
</div>
</div>

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 target=3D"_blank">https://www.ietf.org/mailman/listinfo/spring</a><br>
</blockquote></div></div>-- <br><div dir=3D"ltr" class=3D"gmail_signature" =
data-smartmail=3D"gmail_signature"><div dir=3D"ltr"><div dir=3D"ltr"><div d=
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--000000000000da4d7a05bb1fca83--


From nobody Fri Feb 12 01:02:15 2021
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Subject: [spring] I-D Action: draft-ietf-spring-sr-for-enhanced-vpn-00.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 Source Packet Routing in Networking WG of the IETF.

        Title           : Segment Routing based Virtual Transport Network (VTN) for Enhanced VPN
        Authors         : Jie Dong
                          Stewart Bryant
                          Takuya Miyasaka
                          Yongqing Zhu
                          Fengwei Qin
                          Zhenqiang Li
                          Francois Clad
	Filename        : draft-ietf-spring-sr-for-enhanced-vpn-00.txt
	Pages           : 18
	Date            : 2021-02-11

Abstract:
   Segment Routing (SR) leverages the source routing paradigm.  A node
   steers a packet through an ordered list of instructions, called
   "segments".  A segment can represent topological or service based
   instructions.  A segment can further be associated with a set of
   network resources used for executing the instruction.  Such a segment
   is called resource-aware segment.

   Resource-aware Segment Identifiers (SIDs) may be used to build SR
   paths with a set of reserved network resources.  In addition, a group
   of resource-aware SIDs may be used to build SR based virtual underlay
   networks, which has customized network topology and resource
   attributes required by one or a group of customers and/or services.
   Such virtual networks are the SR instantiations of Virtual Transport
   Networks (VTNs).

   This document describes a suggested use of resource-aware SIDs to
   build SR based VTNs.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-spring-sr-for-enhanced-vpn/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-spring-sr-for-enhanced-vpn-00
https://datatracker.ietf.org/doc/html/draft-ietf-spring-sr-for-enhanced-vpn-00


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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From: Ron Bonica <rbonica@juniper.net>
To: Gyan Mishra <hayabusagsm@gmail.com>, Jeff Tantsura <jefftant.ietf@gmail.com>
CC: Loa Andersson <loa@pi.nu>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: [spring] FW: New Version Notification for draft-bonica-spring-srv6-end-dtm-01.txt
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Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-srv6-end-dtm-01.txt
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From: Ron Bonica <rbonica@juniper.net>
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Thread-Topic: New Version Notification for draft-bonica-spring-srv6-end-dtm-03.txt
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Subject: [spring] FW: New Version Notification for draft-bonica-spring-srv6-end-dtm-03.txt
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From nobody Fri Feb 12 16:38:57 2021
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From: "\"IETF Secretariat\"" <agenda@ietf.org>
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Subject: [spring] spring - Requested sessions have been scheduled for IETF 110
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Dear Bruno Decraene,

The session(s) that you have requested have been scheduled.
Below is the scheduled session information followed by
the original request. 


    spring Session 1 (2:00 requested)
    Monday, 8 March 2021, Session I 1300-1500
    Room Name: Room 7 size: 507
    ---------------------------------------------
    spring Session 2 (2:00 requested)
    Thursday, 11 March 2021, Session I 1300-1500
    Room Name: Room 7 size: 507
    ---------------------------------------------


iCalendar: https://datatracker.ietf.org/meeting/110/sessions/spring.ics

Request Information:


---------------------------------------------------------
Working Group Name: Source Packet Routing in Networking
Area Name: Routing Area
Session Requester: Bruno Decraene


Number of Sessions: 2
Length of Session(s):  2 Hours, 2 Hours
Number of Attendees: 100
Conflicts to Avoid: 
 Chair Conflict: sfc lisp
 Technology Overlap: 6man mpls lsr idr pce rtgwg teas
 Key Participant Conflict: v6ops opsec





People who must be present:
  Bruno Decraene
  Jim Guichard
  Joel M. Halpern
  Martin Vigoureux

Resources Requested:

Special Requests:
  
---------------------------------------------------------



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From: Loa Andersson <loa@pi.nu>
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Subject: [spring] Conflict between SPRING and MPLS Monday of IETF 110
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SPRING chairs,

For the upcoming IETF 110 we have a conflict between MPLS and SPRING the 
first afternoon slot (13-15)  on Monday, it is unfortunate but it was 
the best we could do without re-doing the entire agenda.

However you have a second SPRING on Thursday, as much as possible can 
please you steer discussions that you believe are of interest for MPLS 
to your second slot.

Also, at least for some of the SPRING participants I believe that the 
PALS session on Friday (joint with MPLS and DETNET) may be of interest.

/Loa
-- 

Loa Andersson                        email: loa@pi.nu
Senior MPLS Expert                          loa.pi.nu@gmail.com
Bronze Dragon Consulting             phone: +46 739 81 21 64


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From: Gyan Mishra <hayabusagsm@gmail.com>
Date: Mon, 15 Feb 2021 00:18:03 -0500
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To: Ron Bonica <rbonica@juniper.net>
Cc: Jeff Tantsura <jefftant.ietf@gmail.com>, Loa Andersson <loa@pi.nu>,  "spring@ietf.org" <spring@ietf.org>
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Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-srv6-end-dtm-01.txt
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Thanks Ron!

I really like the innovative idea.

Will this work with LDP v4 v6 to SRv6 interworking as well is my guess?

Kind Regards

Gyan

On Fri, Feb 12, 2021 at 12:04 PM Ron Bonica <rbonica@juniper.net> wrote:

> Gyan,
>
>
>
> Control plane considerations are beyond the scope of this draft. That
> said, when I wrote the draft, I was thinking that the border nodes were
> ASBRs.
>
>
>
>
>              Ron
>
>
>
>
>
>
>
> Juniper Business Use Only
>
> *From:* Gyan Mishra <hayabusagsm@gmail.com>
> *Sent:* Friday, February 12, 2021 3:55 AM
> *To:* Jeff Tantsura <jefftant.ietf@gmail.com>
> *Cc:* Loa Andersson <loa@pi.nu>; Ron Bonica <rbonica@juniper.net>;
> spring@ietf.org
> *Subject:* Re: [spring] FW: New Version Notification for
> draft-bonica-spring-srv6-end-dtm-01.txt
>
>
>
> *[External Email. Be cautious of content]*
>
>
>
>
>
> Hi Ron
>
>
>
> This is an interesting  SR-MPLS to SRv6 interworking concept.
>
>
>
> For an end to end LSP where you end up doing a translation on a border
> node doing the interworking pop of MPLS label stack and impose of SRv6 IP=
v6
> header in one direction and POP of SRv6 IPv6 header and impose of MPLS
> label stack in the other direction, how does the LSP get stitched from
> ingress PE to egress PE FEC destination if the intermediate node in the
> path is a P node doing the translation interworking.  I think if the
> translation interworking node was an egress PE that is doing the ASBR
> function handoff seems plausible, but if it=E2=80=99s a P node as it appe=
ars in
> your example how would the LSP get stitched end to end.
>
>
>
> Could this same concept be used for MPLS LDP fo SRv6 interworking as well=
.
>
>
>
> Kind Regards
>
>
>
> Gyan
>
>
>
> On Tue, Feb 9, 2021 at 8:00 PM Jeff Tantsura <jefftant.ietf@gmail.com>
> wrote:
>
> Thanks Ron, couldn=E2=80=99t have explained it better.
>
> Prefix SID (and the prefix associated with it) could be reachable over an=
y
> interface participating in the topology,  depending on that topology
> structure, with topology changes, outgoing interface might change as well=
.
> Hence the outgoing interface is a runtime property of the top SID.
>
> Loa - does this clarify?
>
>
>
> Cheers,
>
> Jeff
>
> On Feb 9, 2021, 12:35 PM -0800, Ron Bonica <rbonica@juniper.net>, wrote:
>
> Loa,
>
> I think that Jeff means to say that " A SID instance is associated with
> SR-MPLS label stack. A label stack entry can be associated with a next ho=
p.
> A recursive lookup may be required to derive the next hop from the topmos=
t
> label stack entry."
>
> Ron
>
>
>
> Juniper Business Use Only
>
> -----Original Message-----
> From: Loa Andersson <loa@pi.nu>
> Sent: Monday, February 8, 2021 11:51 PM
> To: Jeff Tantsura <jefftant.ietf@gmail.com>; Ron Bonica <
> rbonica@juniper.net>
> Cc: spring@ietf.org
> Subject: Re: [spring] FW: New Version Notification for
> draft-bonica-spring-srv6-end-dtm-01.txt
>
> [External Email. Be cautious of content]
>
>
> Jeff,
>
>
> On 08/02/2021 14:51, Jeff Tantsura wrote:
>
> Hi Ron,
>
> Very useful document, thanks!
>
> Question wrt processing:
> As described in the draft:
> =E2=80=9CA SID instance is associated with SR-MPLS label stack and outgoi=
ng
> interface.=E2=80=9D
>
> I=E2=80=99d think that outgoing interface would be recursively resolved b=
ased on
> the top SID (and could change based on topological semantics).
> Could you please elaborate?
>
>
> What exactly do yo mean by "recursively"?
>
> /Loa
>
>
> Thanks!
>
>
> Cheers,
> Jeff
>
> On Feb 7, 2021, at 08:46, Ron Bonica <rbonica=3D40juniper.net@dmarc.ietf.=
org>
> wrote:
>
> =EF=BB=BF
> Please review and comment
>
>
> Juniper Business Use Only
>
> -----Original Message-----
> From: internet-drafts@ietf.org <internet-drafts@ietf.org>
> Sent: Sunday, February 7, 2021 11:41 AM
> To: Greg Mirsky <gregimirsky@gmail.com>; Peng Shaofu
> <peng.shaofu@zte.com.cn>; Ron Bonica <rbonica@juniper.net>; Shaofu
> Peng <peng.shaofu@zte.com.cn>; Shraddha Hegde
> <shraddha@juniper.net>; EXT- zhang.zheng@zte.com.cn
> <zhang.zheng@zte.com.cn>
> Subject: New Version Notification for
> draft-bonica-spring-srv6-end-dtm-01.txt
>
> [External Email. Be cautious of content]
>
>
> A new version of I-D, draft-bonica-spring-srv6-end-dtm-01.txt
> has been successfully submitted by Ron Bonica and posted to the IETF
> repository.
>
> Name: draft-bonica-spring-srv6-end-dtm
> Revision: 01
> Title: The SRv6 END.DTM Segment Type
> Document date: 2021-02-07
> Group: Individual Submission
> Pages: 7
> URL:
> https://urldefense.com/v3/__https://www.ietf.org/archive/id/draft-bonica-=
spring-srv6-end-dtm-01.txt__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9X=
g2bqsA3kb6qY2F-3qbYIFrhF8F9ybUH5$
> <https://urldefense.com/v3/__https:/www.ietf.org/archive/id/draft-bonica-=
spring-srv6-end-dtm-01.txt__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9X=
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> Status:
> https://urldefense.com/v3/__https://datatracker.ietf.org/doc/draft-b
> <https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/draft-b>
> onica-spring-srv6-end-dtm__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8ap
> yYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8Oytsvgj$
> Htmlized:
> https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/draft-b=
onica-spring-srv6-end-dtm__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg=
2bqsA3kb6qY2F-3qbYIFrhF8F2zaLIO$
> <https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/html/draft-b=
onica-spring-srv6-end-dtm__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg=
2bqsA3kb6qY2F-3qbYIFrhF8F2zaLIO$>
> Htmlized:
> https://urldefense.com/v3/__https://tools.ietf.org/html/draft-bonica-spri=
ng-srv6-end-dtm-01__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3k=
b6qY2F-3qbYIFrhF8DZVjUN4$
> <https://urldefense.com/v3/__https:/tools.ietf.org/html/draft-bonica-spri=
ng-srv6-end-dtm-01__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3k=
b6qY2F-3qbYIFrhF8DZVjUN4$>
> Diff:
> https://urldefense.com/v3/__https://www.ietf.org/rfcdiff?url2=3Ddraft-
> <https://urldefense.com/v3/__https:/www.ietf.org/rfcdiff?url2=3Ddraft->
> bonica-spring-srv6-end-dtm-01__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4t
> F8apyYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8CJWOgzv$
>
> Abstract:
> This document describes a new SRv6 segment type, called END.DTM. The
> END.DTM segment type supports inter-working between SRv6 and SR-MPLS.
> Like any segment type, END.DTM contains a function and arguments.
> The function causes the processing SRv6 node to remove an SRv6 header
> and impose an SR-MPLS label stack. The arguments determine MPLS-
> label stack contents.
>
>
>
>
> 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
> <https://urldefense.com/v3/__http:/tools.ietf.org__;!!NEt6yMaO-gk!TZVumo7=
a10f3Mu7tLnW06iZ9c6yuW_EVwbfeh-jooFDtvB9TevKWnUQVFtcVfDrk$>
> .
>
> The IETF Secretariat
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
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> ing__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3kb6qY2F-3q
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>
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
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> ng__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3kb6qY2F-3qbY
> IFrhF8PggLsaR$
>
>
> --
>
> Loa Andersson email: loa@pi.nu
> Senior MPLS Expert loa.pi.nu@gmail.com
> Bronze Dragon Consulting phone: +46 739 81 21 64
>
> _______________________________________________
> spring mailing list
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> <https://urldefense.com/v3/__https:/www.ietf.org/mailman/listinfo/spring_=
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>
> --
>
>
> <https://urldefense.com/v3/__http:/www.verizon.com/__;!!NEt6yMaO-gk!TZVum=
o7a10f3Mu7tLnW06iZ9c6yuW_EVwbfeh-jooFDtvB9TevKWnUQVFrlDW1y5$>
>
> *Gyan Mishra*
>
> *Network Solutions Architect *
>
>
>
> *M 301 502-1347 13101 Columbia Pike
> <https://www.google.com/maps/search/13101+Columbia+Pike?entry=3Dgmail&sou=
rce=3Dg>
> *Silver Spring, MD
>
>
>
--=20

<http://www.verizon.com/>

*Gyan Mishra*

*Network Solutions A**rchitect *



*M 301 502-134713101 Columbia Pike *Silver Spring, MD

--000000000000dcd28005bb591ccc
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<div><br></div><div dir=3D"auto">Thanks Ron!</div><div dir=3D"auto"><br></d=
iv><div dir=3D"auto">I really like the innovative idea.</div><div dir=3D"au=
to"><br></div><div dir=3D"auto">Will this work with LDP v4 v6 to SRv6 inter=
working as well is my guess?</div><div dir=3D"auto"><br></div><div dir=3D"a=
uto">Kind Regards=C2=A0</div><div dir=3D"auto"><br></div><div dir=3D"auto">=
Gyan</div><div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gma=
il_attr">On Fri, Feb 12, 2021 at 12:04 PM Ron Bonica &lt;<a href=3D"mailto:=
rbonica@juniper.net">rbonica@juniper.net</a>&gt; wrote:<br></div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc sol=
id;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple" style=3D"word-wrap:break=
-word">
<div class=3D"m_-3435520608969072460WordSection1">
<p class=3D"MsoNormal">Gyan,<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Control plane considerations are beyond the scope of=
 this draft. That said, when I wrote the draft, I was thinking that the bor=
der nodes were ASBRs.<u></u><u></u></p></div></div><div lang=3D"EN-US" link=
=3D"blue" vlink=3D"purple" style=3D"word-wrap:break-word"><div class=3D"m_-=
3435520608969072460WordSection1">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0Ron<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"m_-3435520608969072460msipfooter30b3d538" align=3D"center" styl=
e=3D"margin:0in;text-align:center">
<span style=3D"font-size:7.0pt;color:black">Juniper Business Use Only</span=
><u></u><u></u></p>
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Gyan Mishra &lt;<a href=3D"mailto:hayab=
usagsm@gmail.com" target=3D"_blank">hayabusagsm@gmail.com</a>&gt; <br>
<b>Sent:</b> Friday, February 12, 2021 3:55 AM<br>
<b>To:</b> Jeff Tantsura &lt;<a href=3D"mailto:jefftant.ietf@gmail.com" tar=
get=3D"_blank">jefftant.ietf@gmail.com</a>&gt;<br>
<b>Cc:</b> Loa Andersson &lt;<a href=3D"mailto:loa@pi.nu" target=3D"_blank"=
>loa@pi.nu</a>&gt;; Ron Bonica &lt;<a href=3D"mailto:rbonica@juniper.net" t=
arget=3D"_blank">rbonica@juniper.net</a>&gt;; <a href=3D"mailto:spring@ietf=
.org" target=3D"_blank">spring@ietf.org</a><br>
<b>Subject:</b> Re: [spring] FW: New Version Notification for draft-bonica-=
spring-srv6-end-dtm-01.txt<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal" style=3D"line-height:12.0pt;background:#ffeb9c"><b><=
span style=3D"font-size:10.5pt;font-family:&quot;Lato&quot;,sans-serif;colo=
r:black">[External Email. Be cautious of content]<u></u><u></u></span></b><=
/p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Hi Ron=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">This is an interesting =C2=A0SR-MPLS to SRv6 interwo=
rking concept.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">For an end to end LSP where you end up doing a trans=
lation on a border node doing the interworking pop of MPLS label stack and =
impose of SRv6 IPv6 header in one direction and POP of SRv6 IPv6 header and=
 impose of MPLS label stack in the
 other direction, how does the LSP get stitched from ingress PE to egress P=
E FEC destination if the intermediate node in the path is a P node doing th=
e translation interworking.=C2=A0 I think if the translation interworking n=
ode was an egress PE that is doing the
 ASBR function handoff seems plausible, but if it=E2=80=99s a P node as it =
appears in your example how would the LSP get stitched end to end.<u></u><u=
></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Could this same concept be used for MPLS LDP fo SRv6=
 interworking as well.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Kind Regards=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Gyan<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal">On Tue, Feb 9, 2021 at 8:00 PM Jeff Tantsura &lt;<a =
href=3D"mailto:jefftant.ietf@gmail.com" target=3D"_blank">jefftant.ietf@gma=
il.com</a>&gt; wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div name=3D"messageBodySection">
<div>
<p class=3D"MsoNormal">Thanks Ron, couldn=E2=80=99t have explained it bette=
r.=C2=A0<br>
<br>
Prefix SID (and the prefix associated with it) could be reachable over any =
interface participating in the topology,=C2=A0=C2=A0depending on that topol=
ogy structure, with topology changes, outgoing interface might change as we=
ll. Hence the outgoing interface is a runtime
 property of the top SID.<br>
<br>
Loa - does this clarify?<u></u><u></u></p>
</div>
</div>
<div name=3D"messageSignatureSection">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">Cheers, <u></u><u></u></p>
<div>
<p class=3D"MsoNormal">Jeff<u></u><u></u></p>
</div>
</div>
</div>
</div>
<div>
<div name=3D"messageReplySection">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">On Feb 9, 2021, 12:35=
 PM -0800, Ron Bonica &lt;<a href=3D"mailto:rbonica@juniper.net" target=3D"=
_blank">rbonica@juniper.net</a>&gt;, wrote:<u></u><u></u></p>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 8.0pt;margin-left:3.75pt;margin-top:3.75pt;margin-right:3.75pt=
;margin-bottom:3.75pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">Loa,<br>
<br>
I think that Jeff means to say that &quot; A SID instance is associated wit=
h SR-MPLS label stack. A label stack entry can be associated with a next ho=
p. A recursive lookup may be required to derive the next hop from the topmo=
st label stack entry.&quot;<br>
<br>
Ron<br>
<br>
<br>
<br>
Juniper Business Use Only<br>
<br>
-----Original Message-----<br>
From: Loa Andersson &lt;<a href=3D"mailto:loa@pi.nu" target=3D"_blank">loa@=
pi.nu</a>&gt;<br>
Sent: Monday, February 8, 2021 11:51 PM<br>
To: Jeff Tantsura &lt;<a href=3D"mailto:jefftant.ietf@gmail.com" target=3D"=
_blank">jefftant.ietf@gmail.com</a>&gt;; Ron Bonica &lt;<a href=3D"mailto:r=
bonica@juniper.net" target=3D"_blank">rbonica@juniper.net</a>&gt;<br>
Cc: <a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a=
><br>
Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-=
srv6-end-dtm-01.txt<br>
<br>
[External Email. Be cautious of content]<br>
<br>
<br>
Jeff,<br>
<br>
<br>
On 08/02/2021 14:51, Jeff Tantsura wrote:<u></u><u></u></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal">Hi Ron,<br>
<br>
Very useful document, thanks!<br>
<br>
Question wrt processing:<br>
As described in the draft:<br>
=E2=80=9CA SID instance is associated with SR-MPLS label stack and outgoing=
 interface.=E2=80=9D<br>
<br>
I=E2=80=99d think that outgoing interface would be recursively resolved bas=
ed on the top SID (and could change based on topological semantics).<br>
Could you please elaborate?<u></u><u></u></p>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
What exactly do yo mean by &quot;recursively&quot;?<br>
<br>
/Loa<u></u><u></u></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
Thanks!<br>
<br>
<br>
Cheers,<br>
Jeff<br>
<br>
<u></u><u></u></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">On Feb 7, 2021, at 08=
:46, Ron Bonica &lt;rbonica=3D<a href=3D"mailto:40juniper.net@dmarc.ietf.or=
g" target=3D"_blank">40juniper.net@dmarc.ietf.org</a>&gt; wrote:<br>
<br>
=EF=BB=BF<br>
Please review and comment<br>
<br>
<br>
Juniper Business Use Only<br>
<br>
<u></u><u></u></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">-----Original Message=
-----<br>
From: <a href=3D"mailto:internet-drafts@ietf.org" target=3D"_blank">interne=
t-drafts@ietf.org</a> &lt;<a href=3D"mailto:internet-drafts@ietf.org" targe=
t=3D"_blank">internet-drafts@ietf.org</a>&gt;<br>
Sent: Sunday, February 7, 2021 11:41 AM<br>
To: Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_bla=
nk">gregimirsky@gmail.com</a>&gt;; Peng Shaofu<br>
&lt;<a href=3D"mailto:peng.shaofu@zte.com.cn" target=3D"_blank">peng.shaofu=
@zte.com.cn</a>&gt;; Ron Bonica &lt;<a href=3D"mailto:rbonica@juniper.net" =
target=3D"_blank">rbonica@juniper.net</a>&gt;; Shaofu<br>
Peng &lt;<a href=3D"mailto:peng.shaofu@zte.com.cn" target=3D"_blank">peng.s=
haofu@zte.com.cn</a>&gt;; Shraddha Hegde<br>
&lt;<a href=3D"mailto:shraddha@juniper.net" target=3D"_blank">shraddha@juni=
per.net</a>&gt;; EXT-
<a href=3D"mailto:zhang.zheng@zte.com.cn" target=3D"_blank">zhang.zheng@zte=
.com.cn</a><br>
&lt;<a href=3D"mailto:zhang.zheng@zte.com.cn" target=3D"_blank">zhang.zheng=
@zte.com.cn</a>&gt;<br>
Subject: New Version Notification for<br>
draft-bonica-spring-srv6-end-dtm-01.txt<br>
<br>
[External Email. Be cautious of content]<br>
<br>
<br>
A new version of I-D, draft-bonica-spring-srv6-end-dtm-01.txt<br>
has been successfully submitted by Ron Bonica and posted to the IETF<br>
repository.<br>
<br>
Name: draft-bonica-spring-srv6-end-dtm<br>
Revision: 01<br>
Title: The SRv6 END.DTM Segment Type<br>
Document date: 2021-02-07<br>
Group: Individual Submission<br>
Pages: 7<br>
URL: <a href=3D"https://urldefense.com/v3/__https:/www.ietf.org/archive/id/=
draft-bonica-spring-srv6-end-dtm-01.txt__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_v=
U4tF8apyYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8F9ybUH5$" target=3D"_blank">
https://urldefense.com/v3/__https://www.ietf.org/archive/id/draft-bonica-sp=
ring-srv6-end-dtm-01.txt__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2=
bqsA3kb6qY2F-3qbYIFrhF8F9ybUH5$</a><br>
Status:<br>
<a href=3D"https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/draf=
t-b" target=3D"_blank">https://urldefense.com/v3/__https://datatracker.ietf=
.org/doc/draft-b</a><br>
onica-spring-srv6-end-dtm__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8ap<br>
yYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8Oytsvgj$<br>
Htmlized: <a href=3D"https://urldefense.com/v3/__https:/datatracker.ietf.or=
g/doc/html/draft-bonica-spring-srv6-end-dtm__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xF=
wM_vU4tF8apyYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8F2zaLIO$" target=3D"_blank">
https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/draft-bon=
ica-spring-srv6-end-dtm__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2b=
qsA3kb6qY2F-3qbYIFrhF8F2zaLIO$</a><br>
Htmlized: <a href=3D"https://urldefense.com/v3/__https:/tools.ietf.org/html=
/draft-bonica-spring-srv6-end-dtm-01__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4t=
F8apyYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8DZVjUN4$" target=3D"_blank">
https://urldefense.com/v3/__https://tools.ietf.org/html/draft-bonica-spring=
-srv6-end-dtm-01__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3kb6=
qY2F-3qbYIFrhF8DZVjUN4$</a><br>
Diff:<br>
<a href=3D"https://urldefense.com/v3/__https:/www.ietf.org/rfcdiff?url2=3Dd=
raft-" target=3D"_blank">https://urldefense.com/v3/__https://www.ietf.org/r=
fcdiff?url2=3Ddraft-</a><br>
bonica-spring-srv6-end-dtm-01__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4t<br>
F8apyYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8CJWOgzv$<br>
<br>
Abstract:<br>
This document describes a new SRv6 segment type, called END.DTM. The<br>
END.DTM segment type supports inter-working between SRv6 and SR-MPLS.<br>
Like any segment type, END.DTM contains a function and arguments.<br>
The function causes the processing SRv6 node to remove an SRv6 header<br>
and impose an SR-MPLS label stack. The arguments determine MPLS-<br>
label stack contents.<br>
<br>
<br>
<br>
<br>
Please note that it may take a couple of minutes from the time of<br>
submission until the htmlized version and diff are available at <a href=3D"=
https://urldefense.com/v3/__http:/tools.ietf.org__;!!NEt6yMaO-gk!TZVumo7a10=
f3Mu7tLnW06iZ9c6yuW_EVwbfeh-jooFDtvB9TevKWnUQVFtcVfDrk$" target=3D"_blank">
tools.ietf.org</a>.<br>
<br>
The IETF Secretariat<u></u><u></u></p>
</blockquote>
<p class=3D"MsoNormal">_______________________________________________<br>
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bYIFrhF8PggLsaR$<u></u><u></u></p>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
_______________________________________________<br>
spring mailing list<br>
<a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a><br=
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ng__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3kb6qY2F-3qbY<br>
IFrhF8PggLsaR$<u></u><u></u></p>
</blockquote>
<p class=3D"MsoNormal"><br>
--<br>
<br>
Loa Andersson email: <a href=3D"mailto:loa@pi.nu" target=3D"_blank">loa@pi.=
nu</a><br>
Senior MPLS Expert <a href=3D"mailto:loa.pi.nu@gmail.com" target=3D"_blank"=
>loa.pi.nu@gmail.com</a><br>
Bronze Dragon Consulting phone: +46 739 81 21 64<u></u><u></u></p>
</blockquote>
</div>
</div>
<p class=3D"MsoNormal">_______________________________________________<br>
spring mailing list<br>
<a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a><br=
>
<a href=3D"https://urldefense.com/v3/__https:/www.ietf.org/mailman/listinfo=
/spring__;!!NEt6yMaO-gk!TZVumo7a10f3Mu7tLnW06iZ9c6yuW_EVwbfeh-jooFDtvB9TevK=
WnUQVFvteCmsw$" target=3D"_blank">https://www.ietf.org/mailman/listinfo/spr=
ing</a><u></u><u></u></p>
</blockquote>
</div>
</div>
<p class=3D"MsoNormal">-- <u></u><u></u></p>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p><a href=3D"https://urldefense.com/v3/__http:/www.verizon.com/__;!!NEt6yM=
aO-gk!TZVumo7a10f3Mu7tLnW06iZ9c6yuW_EVwbfeh-jooFDtvB9TevKWnUQVFrlDW1y5$" ta=
rget=3D"_blank"><span style=3D"color:#1155cc;text-decoration:none"><img bor=
der=3D"0" width=3D"81" height=3D"18" style=3D"width:.8437in;height:.1875in"=
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ge/VerizonWireless/vz-logo-email"></span></a><span style=3D"color:#222222">=
<u></u><u></u></span></p>
<p style=3D"margin:0in"><b><span style=3D"font-family:&quot;Arial&quot;,san=
s-serif;color:black">Gyan Mishra</span></b><span style=3D"font-family:&quot=
;Arial&quot;,sans-serif;color:black"><u></u><u></u></span></p>
<p style=3D"margin:0in"><i><span style=3D"font-family:&quot;Georgia&quot;,s=
erif;color:black">Network Solutions Architect=C2=A0</span></i><span style=
=3D"color:#222222"><u></u><u></u></span></p>
<p style=3D"margin:0in"><i><span style=3D"font-family:&quot;Georgia&quot;,s=
erif;color:black">M 301 502-1347<br>
<a href=3D"https://www.google.com/maps/search/13101+Columbia+Pike?entry=3Dg=
mail&amp;source=3Dg">13101 Columbia Pike</a>=C2=A0<br>
</span></i><span style=3D"color:black">Silver Spring, MD<u></u><u></u></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
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From: Gyan Mishra <hayabusagsm@gmail.com>
Date: Mon, 15 Feb 2021 11:22:24 -0500
Message-ID: <CABNhwV2o6a7jPA-vTELD1rJYTe5GTmtnEBx2q_CbHZZYOwm+Gw@mail.gmail.com>
To: Ron Bonica <rbonica@juniper.net>
Cc: Jeff Tantsura <jefftant.ietf@gmail.com>, Loa Andersson <loa@pi.nu>,  "spring@ietf.org" <spring@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/Xp-sgt96tpVIuVoDi5a6avp7ajQ>
Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-srv6-end-dtm-01.txt
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Make sense!

Thanks

Gyan

On Mon, Feb 15, 2021 at 10:56 AM Ron Bonica <rbonica@juniper.net> wrote:

> Hi Gyan,
>
>
>
> In theory, it should map any END.DTM to  any MPLS label stack, regardless
> of the control plane.
>
>
>
>                                                                       Ron
>
>
>
>
>
>
>
> Juniper Business Use Only
>
> *From:* Gyan Mishra <hayabusagsm@gmail.com>
> *Sent:* Monday, February 15, 2021 12:18 AM
> *To:* Ron Bonica <rbonica@juniper.net>
>
> *Cc:* Jeff Tantsura <jefftant.ietf@gmail.com>; Loa Andersson <loa@pi.nu>;
> spring@ietf.org
> *Subject:* Re: [spring] FW: New Version Notification for
> draft-bonica-spring-srv6-end-dtm-01.txt
>
>
>
> *[External Email. Be cautious of content]*
>
>
>
>
>
> Thanks Ron!
>
>
>
> I really like the innovative idea.
>
>
>
> Will this work with LDP v4 v6 to SRv6 interworking as well is my guess?
>
>
>
> Kind Regards
>
>
>
> Gyan
>
>
>
> On Fri, Feb 12, 2021 at 12:04 PM Ron Bonica <rbonica@juniper.net> wrote:
>
> Gyan,
>
>
>
> Control plane considerations are beyond the scope of this draft. That
> said, when I wrote the draft, I was thinking that the border nodes were
> ASBRs.
>
>
>
>
>              Ron
>
>
>
>
>
>
>
> Juniper Business Use Only
>
> *From:* Gyan Mishra <hayabusagsm@gmail.com>
> *Sent:* Friday, February 12, 2021 3:55 AM
> *To:* Jeff Tantsura <jefftant.ietf@gmail.com>
> *Cc:* Loa Andersson <loa@pi.nu>; Ron Bonica <rbonica@juniper.net>;
> spring@ietf.org
> *Subject:* Re: [spring] FW: New Version Notification for
> draft-bonica-spring-srv6-end-dtm-01.txt
>
>
>
> *[External Email. Be cautious of content]*
>
>
>
>
>
> Hi Ron
>
>
>
> This is an interesting  SR-MPLS to SRv6 interworking concept.
>
>
>
> For an end to end LSP where you end up doing a translation on a border
> node doing the interworking pop of MPLS label stack and impose of SRv6 IP=
v6
> header in one direction and POP of SRv6 IPv6 header and impose of MPLS
> label stack in the other direction, how does the LSP get stitched from
> ingress PE to egress PE FEC destination if the intermediate node in the
> path is a P node doing the translation interworking.  I think if the
> translation interworking node was an egress PE that is doing the ASBR
> function handoff seems plausible, but if it=E2=80=99s a P node as it appe=
ars in
> your example how would the LSP get stitched end to end.
>
>
>
> Could this same concept be used for MPLS LDP fo SRv6 interworking as well=
.
>
>
>
> Kind Regards
>
>
>
> Gyan
>
>
>
> On Tue, Feb 9, 2021 at 8:00 PM Jeff Tantsura <jefftant.ietf@gmail.com>
> wrote:
>
> Thanks Ron, couldn=E2=80=99t have explained it better.
>
> Prefix SID (and the prefix associated with it) could be reachable over an=
y
> interface participating in the topology,  depending on that topology
> structure, with topology changes, outgoing interface might change as well=
.
> Hence the outgoing interface is a runtime property of the top SID.
>
> Loa - does this clarify?
>
>
>
> Cheers,
>
> Jeff
>
> On Feb 9, 2021, 12:35 PM -0800, Ron Bonica <rbonica@juniper.net>, wrote:
>
> Loa,
>
> I think that Jeff means to say that " A SID instance is associated with
> SR-MPLS label stack. A label stack entry can be associated with a next ho=
p.
> A recursive lookup may be required to derive the next hop from the topmos=
t
> label stack entry."
>
> Ron
>
>
>
> Juniper Business Use Only
>
> -----Original Message-----
> From: Loa Andersson <loa@pi.nu>
> Sent: Monday, February 8, 2021 11:51 PM
> To: Jeff Tantsura <jefftant.ietf@gmail.com>; Ron Bonica <
> rbonica@juniper.net>
> Cc: spring@ietf.org
> Subject: Re: [spring] FW: New Version Notification for
> draft-bonica-spring-srv6-end-dtm-01.txt
>
> [External Email. Be cautious of content]
>
>
> Jeff,
>
>
> On 08/02/2021 14:51, Jeff Tantsura wrote:
>
> Hi Ron,
>
> Very useful document, thanks!
>
> Question wrt processing:
> As described in the draft:
> =E2=80=9CA SID instance is associated with SR-MPLS label stack and outgoi=
ng
> interface.=E2=80=9D
>
> I=E2=80=99d think that outgoing interface would be recursively resolved b=
ased on
> the top SID (and could change based on topological semantics).
> Could you please elaborate?
>
>
> What exactly do yo mean by "recursively"?
>
> /Loa
>
>
> Thanks!
>
>
> Cheers,
> Jeff
>
> On Feb 7, 2021, at 08:46, Ron Bonica <rbonica=3D40juniper.net@dmarc.ietf.=
org>
> wrote:
>
> =EF=BB=BF
> Please review and comment
>
>
> Juniper Business Use Only
>
> -----Original Message-----
> From: internet-drafts@ietf.org <internet-drafts@ietf.org>
> Sent: Sunday, February 7, 2021 11:41 AM
> To: Greg Mirsky <gregimirsky@gmail.com>; Peng Shaofu
> <peng.shaofu@zte.com.cn>; Ron Bonica <rbonica@juniper.net>; Shaofu
> Peng <peng.shaofu@zte.com.cn>; Shraddha Hegde
> <shraddha@juniper.net>; EXT- zhang.zheng@zte.com.cn
> <zhang.zheng@zte.com.cn>
> Subject: New Version Notification for
> draft-bonica-spring-srv6-end-dtm-01.txt
>
> [External Email. Be cautious of content]
>
>
> A new version of I-D, draft-bonica-spring-srv6-end-dtm-01.txt
> has been successfully submitted by Ron Bonica and posted to the IETF
> repository.
>
> Name: draft-bonica-spring-srv6-end-dtm
> Revision: 01
> Title: The SRv6 END.DTM Segment Type
> Document date: 2021-02-07
> Group: Individual Submission
> Pages: 7
> URL:
> https://urldefense.com/v3/__https://www.ietf.org/archive/id/draft-bonica-=
spring-srv6-end-dtm-01.txt__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9X=
g2bqsA3kb6qY2F-3qbYIFrhF8F9ybUH5$
> <https://urldefense.com/v3/__https:/www.ietf.org/archive/id/draft-bonica-=
spring-srv6-end-dtm-01.txt__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9X=
g2bqsA3kb6qY2F-3qbYIFrhF8F9ybUH5$>
> Status:
> https://urldefense.com/v3/__https://datatracker.ietf.org/doc/draft-b
> <https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/draft-b>
> onica-spring-srv6-end-dtm__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8ap
> yYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8Oytsvgj$
> Htmlized:
> https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/draft-b=
onica-spring-srv6-end-dtm__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg=
2bqsA3kb6qY2F-3qbYIFrhF8F2zaLIO$
> <https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/html/draft-b=
onica-spring-srv6-end-dtm__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg=
2bqsA3kb6qY2F-3qbYIFrhF8F2zaLIO$>
> Htmlized:
> https://urldefense.com/v3/__https://tools.ietf.org/html/draft-bonica-spri=
ng-srv6-end-dtm-01__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3k=
b6qY2F-3qbYIFrhF8DZVjUN4$
> <https://urldefense.com/v3/__https:/tools.ietf.org/html/draft-bonica-spri=
ng-srv6-end-dtm-01__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3k=
b6qY2F-3qbYIFrhF8DZVjUN4$>
> Diff:
> https://urldefense.com/v3/__https://www.ietf.org/rfcdiff?url2=3Ddraft-
> <https://urldefense.com/v3/__https:/www.ietf.org/rfcdiff?url2=3Ddraft->
> bonica-spring-srv6-end-dtm-01__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4t
> F8apyYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8CJWOgzv$
>
> Abstract:
> This document describes a new SRv6 segment type, called END.DTM. The
> END.DTM segment type supports inter-working between SRv6 and SR-MPLS.
> Like any segment type, END.DTM contains a function and arguments.
> The function causes the processing SRv6 node to remove an SRv6 header
> and impose an SR-MPLS label stack. The arguments determine MPLS-
> label stack contents.
>
>
>
>
> 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
> <https://urldefense.com/v3/__http:/tools.ietf.org__;!!NEt6yMaO-gk!TZVumo7=
a10f3Mu7tLnW06iZ9c6yuW_EVwbfeh-jooFDtvB9TevKWnUQVFtcVfDrk$>
> .
>
> The IETF Secretariat
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/spr
> <https://urldefense.com/v3/__https:/www.ietf.org/mailman/listinfo/spr>
> ing__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3kb6qY2F-3q
> bYIFrhF8PggLsaR$
>
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/spri
> <https://urldefense.com/v3/__https:/www.ietf.org/mailman/listinfo/spri>
> ng__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3kb6qY2F-3qbY
> IFrhF8PggLsaR$
>
>
> --
>
> Loa Andersson email: loa@pi.nu
> Senior MPLS Expert loa.pi.nu@gmail.com
> Bronze Dragon Consulting phone: +46 739 81 21 64
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
> <https://urldefense.com/v3/__https:/www.ietf.org/mailman/listinfo/spring_=
_;!!NEt6yMaO-gk!TZVumo7a10f3Mu7tLnW06iZ9c6yuW_EVwbfeh-jooFDtvB9TevKWnUQVFvt=
eCmsw$>
>
> --
>
> [image: Image removed by sender.]
> <https://urldefense.com/v3/__http:/www.verizon.com/__;!!NEt6yMaO-gk!TZVum=
o7a10f3Mu7tLnW06iZ9c6yuW_EVwbfeh-jooFDtvB9TevKWnUQVFrlDW1y5$>
>
> *Gyan Mishra*
>
> *Network Solutions Architect *
>
>
>
> *M 301 502-1347 13101 Columbia Pike
> <https://urldefense.com/v3/__https:/www.google.com/maps/search/13101*Colu=
mbia*Pike?entry=3Dgmail&source=3Dg__;Kys!!NEt6yMaO-gk!SxXh23PxhqhKPJavn0YFR=
aVlbQaMsJt52t189MNQrydcMfjljeN9XpBLe0cAVGGF$>
> *Silver Spring, MD
>
>
>
> --
>
> [image: Image removed by sender.]
> <https://urldefense.com/v3/__http:/www.verizon.com/__;!!NEt6yMaO-gk!SxXh2=
3PxhqhKPJavn0YFRaVlbQaMsJt52t189MNQrydcMfjljeN9XpBLewVfXQYW$>
>
> *Gyan Mishra*
>
> *Network Solutions Architect *
>
>
>
> *M 301 502-1347 13101 Columbia Pike
> <https://www.google.com/maps/search/13101+Columbia+Pike?entry=3Dgmail&sou=
rce=3Dg>
> *Silver Spring, MD
>
>
>
--=20

<http://www.verizon.com/>

*Gyan Mishra*

*Network Solutions A**rchitect *



*M 301 502-134713101 Columbia Pike *Silver Spring, MD

--000000000000c9084c05bb62644b
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div><br></div><div dir=3D"auto">Make sense!</div><div dir=3D"auto"><br></d=
iv><div dir=3D"auto">Thanks=C2=A0</div><div dir=3D"auto"><br></div><div dir=
=3D"auto">Gyan</div><div><br><div class=3D"gmail_quote"><div dir=3D"ltr" cl=
ass=3D"gmail_attr">On Mon, Feb 15, 2021 at 10:56 AM Ron Bonica &lt;<a href=
=3D"mailto:rbonica@juniper.net">rbonica@juniper.net</a>&gt; wrote:<br></div=
><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1=
px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple" style=3D"word-wrap:break=
-word">
<div class=3D"m_6602809766222895475WordSection1">
<p class=3D"MsoNormal">Hi Gyan,<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">In theory, it should map any END.DTM to=C2=A0 any MP=
LS label stack, regardless of the control plane.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Ron<u></u><u=
></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"m_6602809766222895475msipfooter30b3d538" align=3D"center" style=
=3D"margin:0in;text-align:center">
<span style=3D"font-size:7.0pt;color:black">Juniper Business Use Only</span=
><u></u><u></u></p>
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Gyan Mishra &lt;<a href=3D"mailto:hayab=
usagsm@gmail.com" target=3D"_blank">hayabusagsm@gmail.com</a>&gt; <br>
<b>Sent:</b> Monday, February 15, 2021 12:18 AM<br>
<b>To:</b> Ron Bonica &lt;<a href=3D"mailto:rbonica@juniper.net" target=3D"=
_blank">rbonica@juniper.net</a>&gt;<br>
</p></div></div></div></div><div lang=3D"EN-US" link=3D"blue" vlink=3D"purp=
le" style=3D"word-wrap:break-word"><div class=3D"m_6602809766222895475WordS=
ection1"><div><div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padd=
ing:3.0pt 0in 0in 0in"><p class=3D"MsoNormal"><b>Cc:</b> Jeff Tantsura &lt;=
<a href=3D"mailto:jefftant.ietf@gmail.com" target=3D"_blank">jefftant.ietf@=
gmail.com</a>&gt;; Loa Andersson &lt;<a href=3D"mailto:loa@pi.nu" target=3D=
"_blank">loa@pi.nu</a>&gt;; <a href=3D"mailto:spring@ietf.org" target=3D"_b=
lank">spring@ietf.org</a><br>
<b>Subject:</b> Re: [spring] FW: New Version Notification for draft-bonica-=
spring-srv6-end-dtm-01.txt<u></u><u></u></p></div></div></div></div><div la=
ng=3D"EN-US" link=3D"blue" vlink=3D"purple" style=3D"word-wrap:break-word">=
<div class=3D"m_6602809766222895475WordSection1"><div><div style=3D"border:=
none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in 0in 0in"><p class=3D"=
MsoNormal"></p>
</div>
</div></div></div><div lang=3D"EN-US" link=3D"blue" vlink=3D"purple" style=
=3D"word-wrap:break-word"><div class=3D"m_6602809766222895475WordSection1">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal" style=3D"line-height:12.0pt;background:#ffeb9c"><b><=
span style=3D"font-size:10.5pt;font-family:&quot;Lato&quot;,sans-serif;colo=
r:black">[External Email. Be cautious of content]<u></u><u></u></span></b><=
/p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div></div><div lang=3D"EN-US" link=3D"blue" vlink=3D"purple" style=3D"wor=
d-wrap:break-word"><div class=3D"m_6602809766222895475WordSection1"><div></=
div></div></div><div lang=3D"EN-US" link=3D"blue" vlink=3D"purple" style=3D=
"word-wrap:break-word"><div class=3D"m_6602809766222895475WordSection1"><di=
v>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks Ron!<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I really like the innovative idea.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Will this work with LDP v4 v6 to SRv6 interworking a=
s well is my guess?<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Kind Regards=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Gyan<u></u><u></u></p>
</div>
</div></div></div><div lang=3D"EN-US" link=3D"blue" vlink=3D"purple" style=
=3D"word-wrap:break-word"><div class=3D"m_6602809766222895475WordSection1">=
<div><div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div></div></div></div></div></div><div lang=3D"EN-US" link=3D"blue" vlink=
=3D"purple" style=3D"word-wrap:break-word"><div class=3D"m_6602809766222895=
475WordSection1"><div><div><div>
<div>
<p class=3D"MsoNormal">On Fri, Feb 12, 2021 at 12:04 PM Ron Bonica &lt;<a h=
ref=3D"mailto:rbonica@juniper.net" target=3D"_blank">rbonica@juniper.net</a=
>&gt; wrote:<u></u><u></u></p>
</div>
</div></div></div></div></div><div lang=3D"EN-US" link=3D"blue" vlink=3D"pu=
rple" style=3D"word-wrap:break-word"><div class=3D"m_6602809766222895475Wor=
dSection1"><div><div><div><blockquote style=3D"border:none;border-left:soli=
d #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0p=
t;margin-right:0in;margin-bottom:5.0pt"></blockquote></div></div></div></di=
v></div><div lang=3D"EN-US" link=3D"blue" vlink=3D"purple" style=3D"word-wr=
ap:break-word"><div class=3D"m_6602809766222895475WordSection1"><div><div><=
div><blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;paddin=
g:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;mar=
gin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal">Gyan,<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Control plane considerations are beyond the scope of=
 this draft. That said, when I wrote the draft, I was thinking that the bor=
der nodes were ASBRs.<u></u><u></u></p>
</div>
</div>
</blockquote></div></div></div></div></div><div lang=3D"EN-US" link=3D"blue=
" vlink=3D"purple" style=3D"word-wrap:break-word"><div class=3D"m_660280976=
6222895475WordSection1"><div><div><div><blockquote style=3D"border:none;bor=
der-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;ma=
rgin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt"><div>
<div></div></div></blockquote></div></div></div></div></div><div lang=3D"EN=
-US" link=3D"blue" vlink=3D"purple" style=3D"word-wrap:break-word"><div cla=
ss=3D"m_6602809766222895475WordSection1"><div><div><div><blockquote style=
=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;m=
argin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt"><di=
v><div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0Ron<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"m_6602809766222895475m-3435520608969072460msipfooter30b3d538" a=
lign=3D"center" style=3D"margin:0in;text-align:center">
<span style=3D"font-size:7.0pt;color:black">Juniper Business Use Only</span=
><u></u><u></u></p>
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Gyan Mishra &lt;<a href=3D"mailto:hayab=
usagsm@gmail.com" target=3D"_blank">hayabusagsm@gmail.com</a>&gt;
<br>
<b>Sent:</b> Friday, February 12, 2021 3:55 AM<br>
<b>To:</b> Jeff Tantsura &lt;<a href=3D"mailto:jefftant.ietf@gmail.com" tar=
get=3D"_blank">jefftant.ietf@gmail.com</a>&gt;<br>
<b>Cc:</b> Loa Andersson &lt;<a href=3D"mailto:loa@pi.nu" target=3D"_blank"=
>loa@pi.nu</a>&gt;; Ron Bonica &lt;<a href=3D"mailto:rbonica@juniper.net" t=
arget=3D"_blank">rbonica@juniper.net</a>&gt;;
<a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a><br=
>
<b>Subject:</b> Re: [spring] FW: New Version Notification for draft-bonica-=
spring-srv6-end-dtm-01.txt<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"line-height:12.0pt;background:#ffeb9c">
<b><span style=3D"font-size:10.5pt;font-family:&quot;Lato&quot;,sans-serif;=
color:black">[External Email. Be cautious of content]</span></b><u></u><u><=
/u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div></div></blockquote></div></div></div></div></div><div lang=3D"EN-US" =
link=3D"blue" vlink=3D"purple" style=3D"word-wrap:break-word"><div class=3D=
"m_6602809766222895475WordSection1"><div><div><div><blockquote style=3D"bor=
der:none;border-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;margin-l=
eft:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt"><div><div>=
<div></div></div></div></blockquote></div></div></div></div></div><div lang=
=3D"EN-US" link=3D"blue" vlink=3D"purple" style=3D"word-wrap:break-word"><d=
iv class=3D"m_6602809766222895475WordSection1"><div><div><div><blockquote s=
tyle=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0=
pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt"=
><div><div><div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Hi Ron=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">This is an interesting =C2=A0SR-MPLS to SRv6 interwo=
rking concept.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">For an end to end LSP where you end up doing a trans=
lation on a border node doing the interworking pop of MPLS label stack and =
impose of SRv6 IPv6 header in one direction and POP
 of SRv6 IPv6 header and impose of MPLS label stack in the other direction,=
 how does the LSP get stitched from ingress PE to egress PE FEC destination=
 if the intermediate node in the path is a P node doing the translation int=
erworking.=C2=A0 I think if the translation
 interworking node was an egress PE that is doing the ASBR function handoff=
 seems plausible, but if it=E2=80=99s a P node as it appears in your exampl=
e how would the LSP get stitched end to end.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Could this same concept be used for MPLS LDP fo SRv6=
 interworking as well.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Kind Regards=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Gyan<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal">On Tue, Feb 9, 2021 at 8:00 PM Jeff Tantsura &lt;<a =
href=3D"mailto:jefftant.ietf@gmail.com" target=3D"_blank">jefftant.ietf@gma=
il.com</a>&gt; wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<div>
<div name=3D"messageBodySection">
<div>
<p class=3D"MsoNormal">Thanks Ron, couldn=E2=80=99t have explained it bette=
r.=C2=A0<br>
<br>
Prefix SID (and the prefix associated with it) could be reachable over any =
interface participating in the topology,=C2=A0=C2=A0depending on that topol=
ogy structure, with topology changes, outgoing interface might change as we=
ll. Hence the outgoing interface is a runtime
 property of the top SID.<br>
<br>
Loa - does this clarify?<u></u><u></u></p>
</div>
</div>
<div name=3D"messageSignatureSection">
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">Cheers,
<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">Jeff<u></u><u></u></p>
</div>
</div>
</div>
</div>
<div>
<div name=3D"messageReplySection">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">On Feb 9, 2021, 12:35=
 PM -0800, Ron Bonica &lt;<a href=3D"mailto:rbonica@juniper.net" target=3D"=
_blank">rbonica@juniper.net</a>&gt;, wrote:<u></u><u></u></p>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 8.0pt;margin-left:3.75pt;margin-top:3.75pt;margin-right:3.75pt=
;margin-bottom:3.75pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">Loa,<br>
<br>
I think that Jeff means to say that &quot; A SID instance is associated wit=
h SR-MPLS label stack. A label stack entry can be associated with a next ho=
p. A recursive lookup may be required to derive the next hop from the topmo=
st label stack entry.&quot;<br>
<br>
Ron<br>
<br>
<br>
<br>
Juniper Business Use Only<br>
<br>
-----Original Message-----<br>
From: Loa Andersson &lt;<a href=3D"mailto:loa@pi.nu" target=3D"_blank">loa@=
pi.nu</a>&gt;<br>
Sent: Monday, February 8, 2021 11:51 PM<br>
To: Jeff Tantsura &lt;<a href=3D"mailto:jefftant.ietf@gmail.com" target=3D"=
_blank">jefftant.ietf@gmail.com</a>&gt;; Ron Bonica &lt;<a href=3D"mailto:r=
bonica@juniper.net" target=3D"_blank">rbonica@juniper.net</a>&gt;<br>
Cc: <a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a=
><br>
Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-=
srv6-end-dtm-01.txt<br>
<br>
[External Email. Be cautious of content]<br>
<br>
<br>
Jeff,<br>
<br>
<br>
On 08/02/2021 14:51, Jeff Tantsura wrote:<u></u><u></u></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal">Hi Ron,<br>
<br>
Very useful document, thanks!<br>
<br>
Question wrt processing:<br>
As described in the draft:<br>
=E2=80=9CA SID instance is associated with SR-MPLS label stack and outgoing=
 interface.=E2=80=9D<br>
<br>
I=E2=80=99d think that outgoing interface would be recursively resolved bas=
ed on the top SID (and could change based on topological semantics).<br>
Could you please elaborate?<u></u><u></u></p>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
What exactly do yo mean by &quot;recursively&quot;?<br>
<br>
/Loa<u></u><u></u></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
Thanks!<br>
<br>
<br>
Cheers,<br>
Jeff<u></u><u></u></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">On Feb 7, 2021, at 08=
:46, Ron Bonica &lt;rbonica=3D<a href=3D"mailto:40juniper.net@dmarc.ietf.or=
g" target=3D"_blank">40juniper.net@dmarc.ietf.org</a>&gt; wrote:<br>
<br>
=EF=BB=BF<br>
Please review and comment<br>
<br>
<br>
Juniper Business Use Only<u></u><u></u></p>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">-----Original Message=
-----<br>
From: <a href=3D"mailto:internet-drafts@ietf.org" target=3D"_blank">interne=
t-drafts@ietf.org</a> &lt;<a href=3D"mailto:internet-drafts@ietf.org" targe=
t=3D"_blank">internet-drafts@ietf.org</a>&gt;<br>
Sent: Sunday, February 7, 2021 11:41 AM<br>
To: Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"_bla=
nk">gregimirsky@gmail.com</a>&gt;; Peng Shaofu<br>
&lt;<a href=3D"mailto:peng.shaofu@zte.com.cn" target=3D"_blank">peng.shaofu=
@zte.com.cn</a>&gt;; Ron Bonica &lt;<a href=3D"mailto:rbonica@juniper.net" =
target=3D"_blank">rbonica@juniper.net</a>&gt;; Shaofu<br>
Peng &lt;<a href=3D"mailto:peng.shaofu@zte.com.cn" target=3D"_blank">peng.s=
haofu@zte.com.cn</a>&gt;; Shraddha Hegde<br>
&lt;<a href=3D"mailto:shraddha@juniper.net" target=3D"_blank">shraddha@juni=
per.net</a>&gt;; EXT-
<a href=3D"mailto:zhang.zheng@zte.com.cn" target=3D"_blank">zhang.zheng@zte=
.com.cn</a><br>
&lt;<a href=3D"mailto:zhang.zheng@zte.com.cn" target=3D"_blank">zhang.zheng=
@zte.com.cn</a>&gt;<br>
Subject: New Version Notification for<br>
draft-bonica-spring-srv6-end-dtm-01.txt<br>
<br>
[External Email. Be cautious of content]<br>
<br>
<br>
A new version of I-D, draft-bonica-spring-srv6-end-dtm-01.txt<br>
has been successfully submitted by Ron Bonica and posted to the IETF<br>
repository.<br>
<br>
Name: draft-bonica-spring-srv6-end-dtm<br>
Revision: 01<br>
Title: The SRv6 END.DTM Segment Type<br>
Document date: 2021-02-07<br>
Group: Individual Submission<br>
Pages: 7<br>
URL: <a href=3D"https://urldefense.com/v3/__https:/www.ietf.org/archive/id/=
draft-bonica-spring-srv6-end-dtm-01.txt__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_v=
U4tF8apyYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8F9ybUH5$" target=3D"_blank">
https://urldefense.com/v3/__https://www.ietf.org/archive/id/draft-bonica-sp=
ring-srv6-end-dtm-01.txt__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2=
bqsA3kb6qY2F-3qbYIFrhF8F9ybUH5$</a><br>
Status:<br>
<a href=3D"https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/draf=
t-b" target=3D"_blank">https://urldefense.com/v3/__https://datatracker.ietf=
.org/doc/draft-b</a><br>
onica-spring-srv6-end-dtm__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8ap<br>
yYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8Oytsvgj$<br>
Htmlized: <a href=3D"https://urldefense.com/v3/__https:/datatracker.ietf.or=
g/doc/html/draft-bonica-spring-srv6-end-dtm__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xF=
wM_vU4tF8apyYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8F2zaLIO$" target=3D"_blank">
https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/draft-bon=
ica-spring-srv6-end-dtm__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2b=
qsA3kb6qY2F-3qbYIFrhF8F2zaLIO$</a><br>
Htmlized: <a href=3D"https://urldefense.com/v3/__https:/tools.ietf.org/html=
/draft-bonica-spring-srv6-end-dtm-01__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4t=
F8apyYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8DZVjUN4$" target=3D"_blank">
https://urldefense.com/v3/__https://tools.ietf.org/html/draft-bonica-spring=
-srv6-end-dtm-01__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3kb6=
qY2F-3qbYIFrhF8DZVjUN4$</a><br>
Diff:<br>
<a href=3D"https://urldefense.com/v3/__https:/www.ietf.org/rfcdiff?url2=3Dd=
raft-" target=3D"_blank">https://urldefense.com/v3/__https://www.ietf.org/r=
fcdiff?url2=3Ddraft-</a><br>
bonica-spring-srv6-end-dtm-01__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4t<br>
F8apyYbe9Xg2bqsA3kb6qY2F-3qbYIFrhF8CJWOgzv$<br>
<br>
Abstract:<br>
This document describes a new SRv6 segment type, called END.DTM. The<br>
END.DTM segment type supports inter-working between SRv6 and SR-MPLS.<br>
Like any segment type, END.DTM contains a function and arguments.<br>
The function causes the processing SRv6 node to remove an SRv6 header<br>
and impose an SR-MPLS label stack. The arguments determine MPLS-<br>
label stack contents.<br>
<br>
<br>
<br>
<br>
Please note that it may take a couple of minutes from the time of<br>
submission until the htmlized version and diff are available at <a href=3D"=
https://urldefense.com/v3/__http:/tools.ietf.org__;!!NEt6yMaO-gk!TZVumo7a10=
f3Mu7tLnW06iZ9c6yuW_EVwbfeh-jooFDtvB9TevKWnUQVFtcVfDrk$" target=3D"_blank">
tools.ietf.org</a>.<br>
<br>
The IETF Secretariat<u></u><u></u></p>
</blockquote>
<p class=3D"MsoNormal">_______________________________________________<br>
spring mailing list<br>
<a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a><br=
>
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/spr" target=3D"_blank">https://urldefense.com/v3/__https://www.ietf.org/ma=
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ing__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3kb6qY2F-3q<br>
bYIFrhF8PggLsaR$<u></u><u></u></p>
</blockquote>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
_______________________________________________<br>
spring mailing list<br>
<a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a><br=
>
<a href=3D"https://urldefense.com/v3/__https:/www.ietf.org/mailman/listinfo=
/spri" target=3D"_blank">https://urldefense.com/v3/__https://www.ietf.org/m=
ailman/listinfo/spri</a><br>
ng__;!!NEt6yMaO-gk!Xh8RUucGY-Dw_xFwM_vU4tF8apyYbe9Xg2bqsA3kb6qY2F-3qbY<br>
IFrhF8PggLsaR$<u></u><u></u></p>
</blockquote>
<p class=3D"MsoNormal"><br>
--<br>
<br>
Loa Andersson email: <a href=3D"mailto:loa@pi.nu" target=3D"_blank">loa@pi.=
nu</a><br>
Senior MPLS Expert <a href=3D"mailto:loa.pi.nu@gmail.com" target=3D"_blank"=
>loa.pi.nu@gmail.com</a><br>
Bronze Dragon Consulting phone: +46 739 81 21 64<u></u><u></u></p>
</blockquote>
</div>
</div>
<p class=3D"MsoNormal">_______________________________________________<br>
spring mailing list<br>
<a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a><br=
>
<a href=3D"https://urldefense.com/v3/__https:/www.ietf.org/mailman/listinfo=
/spring__;!!NEt6yMaO-gk!TZVumo7a10f3Mu7tLnW06iZ9c6yuW_EVwbfeh-jooFDtvB9TevK=
WnUQVFvteCmsw$" target=3D"_blank">https://www.ietf.org/mailman/listinfo/spr=
ing</a><u></u><u></u></p>
</blockquote>
</div>
</div>
<p class=3D"MsoNormal">--
<u></u><u></u></p>
</div></div></div></blockquote></div></div></div></div></div><div lang=3D"E=
N-US" link=3D"blue" vlink=3D"purple" style=3D"word-wrap:break-word"><div cl=
ass=3D"m_6602809766222895475WordSection1"><div><div><div><blockquote style=
=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;m=
argin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt"><di=
v><div><div><div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p><a href=3D"https://urldefense.com/v3/__http:/www.verizon.com/__;!!NEt6yM=
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rget=3D"_blank"><span style=3D"color:#1155cc;border:solid windowtext 1.0pt;=
padding:0in;text-decoration:none"><img border=3D"0" src=3D"cid:177a67fde4b4=
cd34f0f1" alt=3D"Image removed by sender." style=3D"width:81px;max-width:10=
0%"></span></a><u></u><u></u></p>
<p style=3D"margin:0in"><b><span style=3D"font-family:&quot;Arial&quot;,san=
s-serif;color:black">Gyan Mishra</span></b><u></u><u></u></p>
<p style=3D"margin:0in"><i><span style=3D"font-family:&quot;Georgia&quot;,s=
erif;color:black">Network Solutions Architect=C2=A0</span></i><u></u><u></u=
></p>
<p style=3D"margin:0in"><i><span style=3D"font-family:&quot;Georgia&quot;,s=
erif;color:black">M 301 502-1347<br>
<a href=3D"https://urldefense.com/v3/__https:/www.google.com/maps/search/13=
101*Columbia*Pike?entry=3Dgmail&amp;source=3Dg__;Kys!!NEt6yMaO-gk!SxXh23Pxh=
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>13101 Columbia Pike</a>=C2=A0<br>
</span></i><span style=3D"color:black">Silver Spring, MD</span><u></u><u></=
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</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
</div>
<p class=3D"MsoNormal">-- <u></u><u></u></p>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p><a href=3D"https://urldefense.com/v3/__http:/www.verizon.com/__;!!NEt6yM=
aO-gk!SxXh23PxhqhKPJavn0YFRaVlbQaMsJt52t189MNQrydcMfjljeN9XpBLewVfXQYW$" ta=
rget=3D"_blank"><span style=3D"color:#1155cc;border:solid windowtext 1.0pt;=
padding:0in;text-decoration:none"><img border=3D"0" src=3D"cid:177a67fde4b4=
cd34f0f1" alt=3D"Image removed by sender." style=3D"width:81px;max-width:10=
0%"></span></a><span style=3D"color:#222222"><u></u><u></u></span></p></div=
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g=3D"EN-US" link=3D"blue" vlink=3D"purple" style=3D"word-wrap:break-word"><=
div class=3D"m_6602809766222895475WordSection1"><div><div><div><div><div><d=
iv><div><div><div><div>
<p style=3D"margin:0in"><b><span style=3D"font-family:&quot;Arial&quot;,san=
s-serif;color:black">Gyan Mishra</span></b><span style=3D"font-family:&quot=
;Arial&quot;,sans-serif;color:black"><u></u><u></u></span></p>
<p style=3D"margin:0in"><i><span style=3D"font-family:&quot;Georgia&quot;,s=
erif;color:black">Network Solutions Architect=C2=A0</span></i><span style=
=3D"color:#222222"><u></u><u></u></span></p>
<p style=3D"margin:0in"><i><span style=3D"font-family:&quot;Georgia&quot;,s=
erif;color:black">M 301 502-1347<br>
<a href=3D"https://www.google.com/maps/search/13101+Columbia+Pike?entry=3Dg=
mail&amp;source=3Dg">13101 Columbia Pike</a>=C2=A0<br>
</span></i><span style=3D"color:black">Silver Spring, MD<u></u><u></u></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>

</blockquote></div></div>-- <br><div dir=3D"ltr" class=3D"gmail_signature" =
data-smartmail=3D"gmail_signature"><div dir=3D"ltr"><div dir=3D"ltr"><div d=
ir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"l=
tr"><div><p style=3D"color:rgb(34,34,34)"><a href=3D"http://www.verizon.com=
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a><br></p><p style=3D"font-size:1em;margin:0px;font-family:&quot;Verizon NH=
G DS&quot;,Arial,sans-serif;line-height:13px;color:black"><b>Gyan Mishra</b=
></p><p style=3D"color:rgb(34,34,34);margin:0px;line-height:13px"><font fac=
e=3D"georgia, serif" style=3D"color:black;font-size:1em"><i>Network Solutio=
ns A</i></font><font color=3D"#000000" face=3D"georgia, serif"><i>rchitect=
=C2=A0</i></font></p><p style=3D"font-size:1em;margin:0px;line-height:13px;=
color:black"><i><font face=3D"georgia, serif">M 301 502-1347<br>13101 Colum=
bia Pike=C2=A0<br></font></i>Silver Spring, MD</p></div><div><br></div></di=
v></div></div></div></div></div></div></div>

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From: "Dongjie (Jimmy)" <jie.dong@huawei.com>
To: James Guichard <james.n.guichard@futurewei.com>, "spring@ietf.org" <spring@ietf.org>
CC: "spring-chairs@ietf.org" <spring-chairs@ietf.org>
Thread-Topic: Completion of WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
Thread-Index: AdcAlwYxpZNcfsTFQZm5JwoMxdEK/QDcjMHA
Date: Tue, 16 Feb 2021 02:25:30 +0000
Message-ID: <f6b04d1cce1043bd949420d8f343f2a7@huawei.com>
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Subject: Re: [spring] Completion of WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Hi chairs,

Thanks a lot for your guidance. We have uploaded this document as draft-iet=
f-spring-sr-for-enhanced-vpn, and will continue to work on both draft-ietf-=
spring-resource-aware-segments and this document.

And I am not aware of any undisclosed IPR.

Best regards,
Jie

From: spring [mailto:spring-bounces@ietf.org] On Behalf Of James Guichard
Sent: Friday, February 12, 2021 1:06 AM
To: James Guichard <james.n.guichard@futurewei.com>; spring@ietf.org
Cc: spring-chairs@ietf.org
Subject: [spring] Completion of WG Adoption Call for draft-dong-spring-sr-f=
or-enhanced-vpn

Dear WG:

This email ends the 2 week WG adoption call for https://datatracker.ietf.or=
g/doc/draft-dong-spring-sr-for-enhanced-vpn/<https://nam11.safelinks.protec=
tion.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-do=
ng-spring-sr-for-enhanced-vpn%2F&data=3D04%7C01%7Cjames.n.guichard%40future=
wei.com%7C9be5d4dab908405837f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fe=
dc%7C1%7C0%7C637486593751248808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDA=
iLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DAMf3lLJFjUUx=
SJLfQLS2HWZyD8KitGvrFm7n9CpY80Y%3D&reserved=3D0>.

Having reviewed all of the responses, the chairs believe that enough suppor=
t was received to adopt this document into the WG. However, while the docum=
ent is informational in nature, it does have a normative dependency on http=
s://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segments/<htt=
ps://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracke=
r.ietf.org%2Fdoc%2Fdraft-ietf-spring-resource-aware-segments%2F&data=3D04%7=
C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908405837f408d8ceadef29%7=
C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593751248808%7CUnknown%7C=
TWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0=
%3D%7C1000&sdata=3Dtco%2FwwumvVZ%2FbtvVutDh8Dzl3PseJM9X2Q%2FUhXvfR8Q%3D&res=
erved=3D0> which will need to successfully complete WG LC before this docum=
ent will be able to progress from the WG queue. The chairs feel that more w=
ork is necessary in terms of definition and interoperability of resource-aw=
are SIDs. In addition several comments were received during the adoption ca=
ll that will need to be addressed as the document progresses through the WG=
 process. Further, the chairs would like to make it clear that adopting an =
informational document that proposes a particular solution which utilizes r=
esource-aware SIDs does *not* preclude future adoption of other documents w=
hich propose a different solution if the trade-offs are significantly diffe=
rent.

Authors, please resubmit the document as draft-spring-sr-for-enhanced-vpn-0=
0 and also provide explicit confirmation as to whether you are aware of any=
 IPR related to this document.

Regards,

Jim, Joel & Bruno


From: James Guichard <james.n.guichard@futurewei.com<mailto:james.n.guichar=
d@futurewei.com>>
Sent: Wednesday, January 27, 2021 5:47 AM
To: spring@ietf.org<mailto:spring@ietf.org>
Cc: spring-chairs@ietf.org<mailto:spring-chairs@ietf.org>
Subject: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn

Dear WG:

This message starts a 2 week WG adoption call for https://datatracker.ietf.=
org/doc/draft-dong-spring-sr-for-enhanced-vpn/<https://nam11.safelinks.prot=
ection.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-=
dong-spring-sr-for-enhanced-vpn%2F&data=3D04%7C01%7Cjames.n.guichard%40futu=
rewei.com%7C4aefbabc297942dc563408d8c2b93697%7C0fee8ff2a3b240189c753a1d5591=
fedc%7C1%7C0%7C637473448047191786%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwM=
DAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DCW%2BREIvA=
YGW5RqEptdCZk4Q%2Ba1%2F4ta1XOa%2FzwEQjq1I%3D&reserved=3D0> ending February =
10th 2021.

After review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, plea=
se state this explicitly. This gives the chairs an indication of the energy=
 level of people in the working group willing to work on this document. Ple=
ase also provide comments/reasons for your support (or lack thereof) as thi=
s is a stronger way to indicate your (non) support as this is not a vote.

Thanks!

Jim, Bruno & Joel




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<body lang=3D"ZH-CN" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Hi chairs,
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Thanks a lot for your guidance. We have uploaded this document as=
 draft-ietf-spring-sr-for-enhanced-vpn, and will continue to work on both d=
raft-ietf-spring-resource-aware-segments
 and this document.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">And I am not aware of any undisclosed IPR.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Best regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Jie<o:p></o:p></span></p>
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span lang=3D"EN-US" sty=
le=3D"font-size:10.5pt;color:#1F497D"><o:p>&nbsp;</o:p></span></a></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><span lang=
=3D"EN-US"> spring [mailto:spring-bounces@ietf.org]
<b>On Behalf Of </b>James Guichard<br>
<b>Sent:</b> Friday, February 12, 2021 1:06 AM<br>
<b>To:</b> James Guichard &lt;james.n.guichard@futurewei.com&gt;; spring@ie=
tf.org<br>
<b>Cc:</b> spring-chairs@ietf.org<br>
<b>Subject:</b> [spring] Completion of WG Adoption Call for draft-dong-spri=
ng-sr-for-enhanced-vpn<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear WG:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">This email ends the 2 week WG a=
doption call for
<a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2=
F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&a=
mp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908405837f4=
08d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C63748659375124880=
8%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1ha=
WwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DAMf3lLJFjUUxSJLfQLS2HWZyD8KitGvrFm7n9C=
pY80Y%3D&amp;reserved=3D0">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
. <o:p>
</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Having reviewed all of the resp=
onses, the chairs believe that enough support was received to adopt this do=
cument into the WG. However, while the document is informational in nature,=
 it does have a normative dependency
 on <a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%=
3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-spring-resource-aware-segme=
nts%2F&amp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908=
405837f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593=
751248808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBT=
iI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3Dtco%2FwwumvVZ%2FbtvVutDh8Dzl3P=
seJM9X2Q%2FUhXvfR8Q%3D&amp;reserved=3D0">
https://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segments/=
</a> which will need to successfully complete WG LC before this document wi=
ll be able to progress from the WG queue. The chairs feel that more work is=
 necessary in terms of definition
 and interoperability of resource-aware SIDs. In addition several comments =
were received during the adoption call that will need to be addressed as th=
e document progresses through the WG process. Further, the chairs would lik=
e to make it clear that adopting
 an informational document that proposes a particular solution which utiliz=
es resource-aware SIDs does *<b>not</b>* preclude future adoption of other =
documents which propose a different solution if the trade-offs are signific=
antly different.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Authors, please resubmit the do=
cument as draft-spring-sr-for-enhanced-vpn-00 and also provide explicit con=
firmation as to whether you are aware of any IPR related to this document.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Jim, Joel &amp; Bruno<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><span lang=
=3D"EN-US"> James Guichard &lt;<a href=3D"mailto:james.n.guichard@futurewei=
.com">james.n.guichard@futurewei.com</a>&gt;
<br>
<b>Sent:</b> Wednesday, January 27, 2021 5:47 AM<br>
<b>To:</b> <a href=3D"mailto:spring@ietf.org">spring@ietf.org</a><br>
<b>Cc:</b> <a href=3D"mailto:spring-chairs@ietf.org">spring-chairs@ietf.org=
</a><br>
<b>Subject:</b> WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn<=
o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear WG:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">This message starts a 2 week WG=
 adoption call for
<a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2=
F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&a=
mp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C4aefbabc297942dc5634=
08d8c2b93697%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C63747344804719178=
6%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1ha=
WwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DCW%2BREIvAYGW5RqEptdCZk4Q%2Ba1%2F4ta1X=
Oa%2FzwEQjq1I%3D&amp;reserved=3D0">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">After review of the document pl=
ease indicate support (or not) for WG adoption to the mailing list and if y=
ou are willing to work on the document, please state this explicitly. This =
gives the chairs an indication of the
 energy level of people in the working group willing to work on this docume=
nt. Please also provide comments/reasons for your support (or lack thereof)=
 as this is a stronger way to indicate your (non) support as this is not a =
vote.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Jim, Bruno &amp; Joel<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
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To: James Guichard <james.n.guichard@futurewei.com>, "spring@ietf.org" <spring@ietf.org>
Cc: "spring-chairs@ietf.org" <spring-chairs@ietf.org>
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From: Takuya Miyasaka <ta-miyasaka@kddi-research.jp>
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Subject: Re: [spring] Completion of WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Hi,

I am not aware of any IPRs related to this document.

Regards,
Takuya

On 2021/02/12 2:06, James Guichard wrote:
>
> Dear WG:
>
> This email ends the 2 week WG adoption call for 
> https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/ 
> <https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&data=04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908405837f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593751248808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=AMf3lLJFjUUxSJLfQLS2HWZyD8KitGvrFm7n9CpY80Y%3D&reserved=0>. 
>
>
> Having reviewed all of the responses, the chairs believe that enough 
> support was received to adopt this document into the WG. However, 
> while the document is informational in nature, it does have a 
> normative dependency on 
> https://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segments/ 
> <https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-spring-resource-aware-segments%2F&data=04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908405837f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593751248808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=tco%2FwwumvVZ%2FbtvVutDh8Dzl3PseJM9X2Q%2FUhXvfR8Q%3D&reserved=0> 
> which will need to successfully complete WG LC before this document 
> will be able to progress from the WG queue. The chairs feel that more 
> work is necessary in terms of definition and interoperability of 
> resource-aware SIDs. In addition several comments were received during 
> the adoption call that will need to be addressed as the document 
> progresses through the WG process. Further, the chairs would like to 
> make it clear that adopting an informational document that proposes a 
> particular solution which utilizes resource-aware SIDs does **not** 
> preclude future adoption of other documents which propose a different 
> solution if the trade-offs are significantly different.
>
> Authors, please resubmit the document as 
> draft-spring-sr-for-enhanced-vpn-00 and also provide explicit 
> confirmation as to whether you are aware of any IPR related to this 
> document.
>
> Regards,
>
> Jim, Joel & Bruno
>
> *From:* James Guichard <james.n.guichard@futurewei.com>
> *Sent:* Wednesday, January 27, 2021 5:47 AM
> *To:* spring@ietf.org
> *Cc:* spring-chairs@ietf.org
> *Subject:* WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
>
> Dear WG:
>
> This message starts a 2 week WG adoption call for 
> https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/ 
> <https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&data=04%7C01%7Cjames.n.guichard%40futurewei.com%7C4aefbabc297942dc563408d8c2b93697%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637473448047191786%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=CW%2BREIvAYGW5RqEptdCZk4Q%2Ba1%2F4ta1XOa%2FzwEQjq1I%3D&reserved=0> 
> ending February 10^th 2021.
>
> After review of the document please indicate support (or not) for WG 
> adoption to the mailing list and if you are willing to work on the 
> document, please state this explicitly. This gives the chairs an 
> indication of the energy level of people in the working group willing 
> to work on this document. Please also provide comments/reasons for 
> your support (or lack thereof) as this is a stronger way to indicate 
> your (non) support as this is not a vote.
>
> Thanks!
>
> Jim, Bruno & Joel
>
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring

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    <p>Hi,</p>
    <p>I am not aware of any IPRs related to this document.</p>
    <p>Regards,<br>
      Takuya<br>
    </p>
    <div class="moz-cite-prefix">On 2021/02/12 2:06, James Guichard
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:MN2PR13MB42069AA411E068EBC2A6C837D28C9@MN2PR13MB4206.namprd13.prod.outlook.com">
      <meta http-equiv="Content-Type" content="text/html;
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        <p class="MsoNormal">Dear WG:<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">This email ends the 2 week WG adoption call
          for <a
href="https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&amp;data=04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908405837f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593751248808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=AMf3lLJFjUUxSJLfQLS2HWZyD8KitGvrFm7n9CpY80Y%3D&amp;reserved=0"
            moz-do-not-send="true">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>.
          <o:p>
          </o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Having reviewed all of the responses, the
          chairs believe that enough support was received to adopt this
          document into the WG. However, while the document is
          informational in nature, it does have a normative dependency
          on
          <a
href="https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-spring-resource-aware-segments%2F&amp;data=04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908405837f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593751248808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=tco%2FwwumvVZ%2FbtvVutDh8Dzl3PseJM9X2Q%2FUhXvfR8Q%3D&amp;reserved=0"
            moz-do-not-send="true">
https://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segments/</a>
          which will need to successfully complete WG LC before this
          document will be able to progress from the WG queue. The
          chairs feel that more work is necessary in terms of definition
          and interoperability of resource-aware SIDs. In addition
          several comments were received during the adoption call that
          will need to be addressed as the document progresses through
          the WG process. Further, the chairs would like to make it
          clear that adopting an informational document that proposes a
          particular solution which utilizes resource-aware SIDs does *<b>not</b>*
          preclude future adoption of other documents which propose a
          different solution if the trade-offs are significantly
          different.<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Authors, please resubmit the document as
          draft-spring-sr-for-enhanced-vpn-00 and also provide explicit
          confirmation as to whether you are aware of any IPR related to
          this document.<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Regards,<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Jim, Joel &amp; Bruno<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <div>
          <div style="border:none;border-top:solid #E1E1E1
            1.0pt;padding:3.0pt 0in 0in 0in">
            <p class="MsoNormal"><b>From:</b> James Guichard
              <a class="moz-txt-link-rfc2396E" href="mailto:james.n.guichard@futurewei.com">&lt;james.n.guichard@futurewei.com&gt;</a>
              <br>
              <b>Sent:</b> Wednesday, January 27, 2021 5:47 AM<br>
              <b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:spring@ietf.org">spring@ietf.org</a><br>
              <b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:spring-chairs@ietf.org">spring-chairs@ietf.org</a><br>
              <b>Subject:</b> WG Adoption Call for
              draft-dong-spring-sr-for-enhanced-vpn<o:p></o:p></p>
          </div>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Dear WG:<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">This message starts a 2 week WG adoption
          call for <a
href="https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&amp;data=04%7C01%7Cjames.n.guichard%40futurewei.com%7C4aefbabc297942dc563408d8c2b93697%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637473448047191786%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=CW%2BREIvAYGW5RqEptdCZk4Q%2Ba1%2F4ta1XOa%2FzwEQjq1I%3D&amp;reserved=0"
            moz-do-not-send="true">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>
          ending February 10<sup>th</sup> 2021.<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">After review of the document please
          indicate support (or not) for WG adoption to the mailing list
          and if you are willing to work on the document, please state
          this explicitly. This gives the chairs an indication of the
          energy level of people in the working group willing to work on
          this document. Please also provide comments/reasons for your
          support (or lack thereof) as this is a stronger way to
          indicate your (non) support as this is not a vote.<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Thanks!<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Jim, Bruno &amp; Joel<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
      </div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <pre class="moz-quote-pre" wrap="">_______________________________________________
spring mailing list
<a class="moz-txt-link-abbreviated" href="mailto:spring@ietf.org">spring@ietf.org</a>
<a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/spring">https://www.ietf.org/mailman/listinfo/spring</a>
</pre>
    </blockquote>
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I am not aware of any undisclosed IPR.

B.R.

Zhu Yongqing

=20

=B7=A2=BC=FE=C8=CB: spring <spring-bounces@ietf.org> =B4=FA=B1=ED James =
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=B7=A2=CB=CD=CA=B1=BC=E4: 2021=C4=EA2=D4=C212=C8=D5 1:06
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=B3=AD=CB=CD: spring-chairs@ietf.org
=D6=F7=CC=E2: [spring] Completion of WG Adoption Call for
draft-dong-spring-sr-for-enhanced-vpn

=20

Dear WG:

=20

This email ends the 2 week WG adoption call for
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/
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er.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&data=3D04%7C=
01%7C
james.n.guichard%40futurewei.com%7C9be5d4dab908405837f408d8ceadef29%7C0fe=
e8f
f2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593751248808%7CUnknown%7CTWFpb=
GZs
b3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C=
100
0&sdata=3DAMf3lLJFjUUxSJLfQLS2HWZyD8KitGvrFm7n9CpY80Y%3D&reserved=3D0> . =


=20

Having reviewed all of the responses, the chairs believe that enough =
support
was received to adopt this document into the WG. However, while the =
document
is informational in nature, it does have a normative dependency on
https://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segment=
s/
<https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdata=
track
er.ietf.org%2Fdoc%2Fdraft-ietf-spring-resource-aware-segments%2F&data=3D0=
4%7C0
1%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908405837f408d8ceadef29%7=
C0f
ee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593751248808%7CUnknown%7CT=
WFp
bGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3=
D%7
C1000&sdata=3Dtco%2FwwumvVZ%2FbtvVutDh8Dzl3PseJM9X2Q%2FUhXvfR8Q%3D&reserv=
ed=3D0>
which will need to successfully complete WG LC before this document will =
be
able to progress from the WG queue. The chairs feel that more work is
necessary in terms of definition and interoperability of resource-aware
SIDs. In addition several comments were received during the adoption =
call
that will need to be addressed as the document progresses through the WG
process. Further, the chairs would like to make it clear that adopting =
an
informational document that proposes a particular solution which =
utilizes
resource-aware SIDs does *not* preclude future adoption of other =
documents
which propose a different solution if the trade-offs are significantly
different.

=20

Authors, please resubmit the document as =
draft-spring-sr-for-enhanced-vpn-00
and also provide explicit confirmation as to whether you are aware of =
any
IPR related to this document.

=20

Regards,

=20

Jim, Joel & Bruno

=20

=20

From: James Guichard <james.n.guichard@futurewei.com
<mailto:james.n.guichard@futurewei.com> >=20
Sent: Wednesday, January 27, 2021 5:47 AM
To: spring@ietf.org <mailto:spring@ietf.org>=20
Cc: spring-chairs@ietf.org <mailto:spring-chairs@ietf.org>=20
Subject: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn

=20

Dear WG:

=20

This message starts a 2 week WG adoption call for
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/
<https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdata=
track
er.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&data=3D04%7C=
01%7C
james.n.guichard%40futurewei.com%7C4aefbabc297942dc563408d8c2b93697%7C0fe=
e8f
f2a3b240189c753a1d5591fedc%7C1%7C0%7C637473448047191786%7CUnknown%7CTWFpb=
GZs
b3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C=
100
0&sdata=3DCW%2BREIvAYGW5RqEptdCZk4Q%2Ba1%2F4ta1XOa%2FzwEQjq1I%3D&reserved=
=3D0>
ending February 10th 2021.

=20

After review of the document please indicate support (or not) for WG
adoption to the mailing list and if you are willing to work on the =
document,
please state this explicitly. This gives the chairs an indication of the
energy level of people in the working group willing to work on this
document. Please also provide comments/reasons for your support (or lack
thereof) as this is a stronger way to indicate your (non) support as =
this is
not a vote.

=20

Thanks!

=20

Jim, Bruno & Joel

=20

=20

=20


------=_NextPart_000_000A_01D7047A.61F0A100
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<html xmlns:v=3D"urn:schemas-microsoft-com:vml" =
xmlns:o=3D"urn:schemas-microsoft-com:office:office" =
xmlns:w=3D"urn:schemas-microsoft-com:office:word" =
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<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DZH-CN =
link=3D"#0563C1" vlink=3D"#954F72" style=3D'word-wrap:break-word'><div =
class=3DWordSection1><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;color:#1F497D'>I am not aware of any =
undisclosed IPR.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;color:#1F497D'>B.R.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;color:#1F497D'>Zhu =
Yongqing<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:DengXian'><o:p>&nbsp;</o:p></span><=
/p><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal><b><span =
style=3D'font-family:DengXian'>=B7=A2=BC=FE=C8=CB<span =
lang=3DEN-US>:</span></span></b><span lang=3DEN-US =
style=3D'font-family:DengXian'> spring &lt;spring-bounces@ietf.org&gt; =
</span><b><span style=3D'font-family:DengXian'>=B4=FA=B1=ED =
</span></b><span lang=3DEN-US style=3D'font-family:DengXian'>James =
Guichard<br></span><b><span =
style=3D'font-family:DengXian'>=B7=A2=CB=CD=CA=B1=BC=E4<span =
lang=3DEN-US>:</span></span></b><span lang=3DEN-US =
style=3D'font-family:DengXian'> 2021</span><span =
style=3D'font-family:DengXian'>=C4=EA<span =
lang=3DEN-US>2</span>=D4=C2<span lang=3DEN-US>12</span>=C8=D5<span =
lang=3DEN-US> 1:06<br></span><b>=CA=D5=BC=FE=C8=CB<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> James Guichard =
&lt;james.n.guichard@futurewei.com&gt;; =
spring@ietf.org<br></span><b>=B3=AD=CB=CD<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> =
spring-chairs@ietf.org<br></span><b>=D6=F7=CC=E2<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> [spring] Completion of WG =
Adoption Call for =
draft-dong-spring-sr-for-enhanced-vpn<o:p></o:p></span></span></p></div><=
/div><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Dear WG:<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>This email ends the 2 week WG adoption call for <a =
href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F=
%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&=
amp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab90840583=
7f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593751=
248808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTi=
I6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DAMf3lLJFjUUxSJLfQLS2HWZyD8Kit=
GvrFm7n9CpY80Y%3D&amp;reserved=3D0">https://datatracker.ietf.org/doc/draf=
t-dong-spring-sr-for-enhanced-vpn/</a>. <o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Having reviewed all of the =
responses, the chairs believe that enough support was received to adopt =
this document into the WG. However, while the document is informational =
in nature, it does have a normative dependency on <a =
href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F=
%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-spring-resource-aware-segments=
%2F&amp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab9084=
05837f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C63748659=
3751248808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLC=
JBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3Dtco%2FwwumvVZ%2FbtvVutDh8=
Dzl3PseJM9X2Q%2FUhXvfR8Q%3D&amp;reserved=3D0">https://datatracker.ietf.or=
g/doc/draft-ietf-spring-resource-aware-segments/</a> which will need to =
successfully complete WG LC before this document will be able to =
progress from the WG queue. The chairs feel that more work is necessary =
in terms of definition and interoperability of resource-aware SIDs. In =
addition several comments were received during the adoption call that =
will need to be addressed as the document progresses through the WG =
process. Further, the chairs would like to make it clear that adopting =
an informational document that proposes a particular solution which =
utilizes resource-aware SIDs does *<b>not</b>* preclude future adoption =
of other documents which propose a different solution if the trade-offs =
are significantly different.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Authors, please resubmit the =
document as draft-spring-sr-for-enhanced-vpn-00 and also provide =
explicit confirmation as to whether you are aware of any IPR related to =
this document.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Regards,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Jim, Joel &amp; Bruno<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span =
lang=3DEN-US>From:</span></b><span lang=3DEN-US> James Guichard &lt;<a =
href=3D"mailto:james.n.guichard@futurewei.com">james.n.guichard@futurewei=
.com</a>&gt; <br><b>Sent:</b> Wednesday, January 27, 2021 5:47 =
AM<br><b>To:</b> <a =
href=3D"mailto:spring@ietf.org">spring@ietf.org</a><br><b>Cc:</b> <a =
href=3D"mailto:spring-chairs@ietf.org">spring-chairs@ietf.org</a><br><b>S=
ubject:</b> WG Adoption Call for =
draft-dong-spring-sr-for-enhanced-vpn<o:p></o:p></span></p></div></div><p=
 class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Dear WG:<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>This message starts a 2 week WG =
adoption call for <a =
href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F=
%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&=
amp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C4aefbabc297942dc5=
63408d8c2b93697%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637473448047=
191786%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTi=
I6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DCW%2BREIvAYGW5RqEptdCZk4Q%2Ba=
1%2F4ta1XOa%2FzwEQjq1I%3D&amp;reserved=3D0">https://datatracker.ietf.org/=
doc/draft-dong-spring-sr-for-enhanced-vpn/</a> ending February =
10<sup>th</sup> 2021.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>After review of the document please indicate support (or =
not) for WG adoption to the mailing list and if you are willing to work =
on the document, please state this explicitly. This gives the chairs an =
indication of the energy level of people in the working group willing to =
work on this document. Please also provide comments/reasons for your =
support (or lack thereof) as this is a stronger way to indicate your =
(non) support as this is not a vote.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Thanks!<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Jim, Bruno &amp; =
Joel<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p></div></body></html>
------=_NextPart_000_000A_01D7047A.61F0A100--


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From: "Francois Clad (fclad)" <fclad@cisco.com>
To: James Guichard <james.n.guichard@futurewei.com>, "spring@ietf.org" <spring@ietf.org>
CC: "spring-chairs@ietf.org" <spring-chairs@ietf.org>
Thread-Topic: Completion of WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Subject: Re: [spring] Completion of WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Hi Jim, chairs,

I am not aware of any IPR related to this document.

Thanks,
Francois

From: spring <spring-bounces@ietf.org> on behalf of James Guichard <james.n=
.guichard@futurewei.com>
Date: Thursday, 11 February 2021 at 18:06
To: James Guichard <james.n.guichard@futurewei.com>, spring@ietf.org <sprin=
g@ietf.org>
Cc: spring-chairs@ietf.org <spring-chairs@ietf.org>
Subject: [spring] Completion of WG Adoption Call for draft-dong-spring-sr-f=
or-enhanced-vpn
Dear WG:

This email ends the 2 week WG adoption call for https://datatracker.ietf.or=
g/doc/draft-dong-spring-sr-for-enhanced-vpn/<https://nam11.safelinks.protec=
tion.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-do=
ng-spring-sr-for-enhanced-vpn%2F&data=3D04%7C01%7Cjames.n.guichard%40future=
wei.com%7C9be5d4dab908405837f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fe=
dc%7C1%7C0%7C637486593751248808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDA=
iLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DAMf3lLJFjUUx=
SJLfQLS2HWZyD8KitGvrFm7n9CpY80Y%3D&reserved=3D0>.

Having reviewed all of the responses, the chairs believe that enough suppor=
t was received to adopt this document into the WG. However, while the docum=
ent is informational in nature, it does have a normative dependency on http=
s://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segments/<htt=
ps://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracke=
r.ietf.org%2Fdoc%2Fdraft-ietf-spring-resource-aware-segments%2F&data=3D04%7=
C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908405837f408d8ceadef29%7=
C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593751248808%7CUnknown%7C=
TWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0=
%3D%7C1000&sdata=3Dtco%2FwwumvVZ%2FbtvVutDh8Dzl3PseJM9X2Q%2FUhXvfR8Q%3D&res=
erved=3D0> which will need to successfully complete WG LC before this docum=
ent will be able to progress from the WG queue. The chairs feel that more w=
ork is necessary in terms of definition and interoperability of resource-aw=
are SIDs. In addition several comments were received during the adoption ca=
ll that will need to be addressed as the document progresses through the WG=
 process. Further, the chairs would like to make it clear that adopting an =
informational document that proposes a particular solution which utilizes r=
esource-aware SIDs does *not* preclude future adoption of other documents w=
hich propose a different solution if the trade-offs are significantly diffe=
rent.

Authors, please resubmit the document as draft-spring-sr-for-enhanced-vpn-0=
0 and also provide explicit confirmation as to whether you are aware of any=
 IPR related to this document.

Regards,

Jim, Joel & Bruno


From: James Guichard <james.n.guichard@futurewei.com>
Sent: Wednesday, January 27, 2021 5:47 AM
To: spring@ietf.org
Cc: spring-chairs@ietf.org
Subject: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn

Dear WG:

This message starts a 2 week WG adoption call for https://datatracker.ietf.=
org/doc/draft-dong-spring-sr-for-enhanced-vpn/<https://nam11.safelinks.prot=
ection.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-=
dong-spring-sr-for-enhanced-vpn%2F&data=3D04%7C01%7Cjames.n.guichard%40futu=
rewei.com%7C4aefbabc297942dc563408d8c2b93697%7C0fee8ff2a3b240189c753a1d5591=
fedc%7C1%7C0%7C637473448047191786%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwM=
DAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DCW%2BREIvA=
YGW5RqEptdCZk4Q%2Ba1%2F4ta1XOa%2FzwEQjq1I%3D&reserved=3D0> ending February =
10th 2021.

After review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, plea=
se state this explicitly. This gives the chairs an indication of the energy=
 level of people in the working group willing to work on this document. Ple=
ase also provide comments/reasons for your support (or lack thereof) as thi=
s is a stronger way to indicate your (non) support as this is not a vote.

Thanks!

Jim, Bruno & Joel




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<p class=3D"MsoNormal"><span lang=3D"EN-US">Hi Jim, chairs,<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I am not aware of any IPR relat=
ed to this document.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Francois<o:p></o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
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<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:12.0pt;margin-left:36.0pt">
<b><span style=3D"font-size:12.0pt;color:black">From: </span></b><span styl=
e=3D"font-size:12.0pt;color:black">spring &lt;spring-bounces@ietf.org&gt; o=
n behalf of James Guichard &lt;james.n.guichard@futurewei.com&gt;<br>
<b>Date: </b>Thursday, 11 February 2021 at 18:06<br>
<b>To: </b>James Guichard &lt;james.n.guichard@futurewei.com&gt;, spring@ie=
tf.org &lt;spring@ietf.org&gt;<br>
<b>Cc: </b>spring-chairs@ietf.org &lt;spring-chairs@ietf.org&gt;<br>
<b>Subject: </b>[spring] Completion of WG Adoption Call for draft-dong-spri=
ng-sr-for-enhanced-vpn<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Dear WG:<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">This email ends the 2 w=
eek WG adoption call for
<a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2=
F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&a=
mp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908405837f4=
08d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C63748659375124880=
8%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1ha=
WwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DAMf3lLJFjUUxSJLfQLS2HWZyD8KitGvrFm7n9C=
pY80Y%3D&amp;reserved=3D0">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
. <o:p>
</o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Having reviewed all of =
the responses, the chairs believe that enough support was received to adopt=
 this document into the WG. However, while the document is informational in=
 nature, it does have a normative dependency
 on <a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%=
3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-spring-resource-aware-segme=
nts%2F&amp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908=
405837f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593=
751248808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBT=
iI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3Dtco%2FwwumvVZ%2FbtvVutDh8Dzl3P=
seJM9X2Q%2FUhXvfR8Q%3D&amp;reserved=3D0">
https://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segments/=
</a> which will need to successfully complete WG LC before this document wi=
ll be able to progress from the WG queue. The chairs feel that more work is=
 necessary in terms of definition
 and interoperability of resource-aware SIDs. In addition several comments =
were received during the adoption call that will need to be addressed as th=
e document progresses through the WG process. Further, the chairs would lik=
e to make it clear that adopting
 an informational document that proposes a particular solution which utiliz=
es resource-aware SIDs does *<b>not</b>* preclude future adoption of other =
documents which propose a different solution if the trade-offs are signific=
antly different.<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Authors, please resubmi=
t the document as draft-spring-sr-for-enhanced-vpn-00 and also provide expl=
icit confirmation as to whether you are aware of any IPR related to this do=
cument.<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Regards,<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Jim, Joel &amp; Bruno<o=
:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt"><b>From:</b> James Guic=
hard &lt;james.n.guichard@futurewei.com&gt;
<br>
<b>Sent:</b> Wednesday, January 27, 2021 5:47 AM<br>
<b>To:</b> spring@ietf.org<br>
<b>Cc:</b> spring-chairs@ietf.org<br>
<b>Subject:</b> WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn<=
o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Dear WG:<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">This message starts a 2=
 week WG adoption call for
<a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2=
F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&a=
mp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C4aefbabc297942dc5634=
08d8c2b93697%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C63747344804719178=
6%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1ha=
WwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DCW%2BREIvAYGW5RqEptdCZk4Q%2Ba1%2F4ta1X=
Oa%2FzwEQjq1I%3D&amp;reserved=3D0">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">After review of the doc=
ument please indicate support (or not) for WG adoption to the mailing list =
and if you are willing to work on the document, please state this explicitl=
y. This gives the chairs an indication
 of the energy level of people in the working group willing to work on this=
 document. Please also provide comments/reasons for your support (or lack t=
hereof) as this is a stronger way to indicate your (non) support as this is=
 not a vote.<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Thanks!<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">Jim, Bruno &amp; Joel<o=
:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:36.0pt">&nbsp;<o:p></o:p></p>
</div>
</body>
</html>

--_000_SN6PR11MB2575362821B5E1A079DA8361AC879SN6PR11MB2575namp_--


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From: Lizhenbin <lizhenbin@huawei.com>
To: James Guichard <james.n.guichard@futurewei.com>, "spring@ietf.org" <spring@ietf.org>
CC: "spring-chairs@ietf.org" <spring-chairs@ietf.org>
Thread-Topic: Completion of WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
Thread-Index: AdcAlwYxpZNcfsTFQZm5JwoMxdEK/QDcjMHAADVeJ2A=
Date: Wed, 17 Feb 2021 03:35:10 +0000
Message-ID: <5A5B4DE12C0DAC44AF501CD9A2B01A8D939E0775@DGGEMM532-MBX.china.huawei.com>
References: <MN2PR13MB42069AA411E068EBC2A6C837D28C9@MN2PR13MB4206.namprd13.prod.outlook.com> <f6b04d1cce1043bd949420d8f343f2a7@huawei.com>
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Hi All,

I am not aware of any undisclosed IPR.

Best regards,
Zhenbin (Robin)




From: spring [mailto:spring-bounces@ietf.org] On Behalf Of James Guichard
Sent: Friday, February 12, 2021 1:06 AM
To: James Guichard <james.n.guichard@futurewei.com<mailto:james.n.guichard@=
futurewei.com>>; spring@ietf.org<mailto:spring@ietf.org>
Cc: spring-chairs@ietf.org<mailto:spring-chairs@ietf.org>
Subject: [spring] Completion of WG Adoption Call for draft-dong-spring-sr-f=
or-enhanced-vpn

Dear WG:

This email ends the 2 week WG adoption call for https://datatracker.ietf.or=
g/doc/draft-dong-spring-sr-for-enhanced-vpn/<https://nam11.safelinks.protec=
tion.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-do=
ng-spring-sr-for-enhanced-vpn%2F&data=3D04%7C01%7Cjames.n.guichard%40future=
wei.com%7C9be5d4dab908405837f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fe=
dc%7C1%7C0%7C637486593751248808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDA=
iLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DAMf3lLJFjUUx=
SJLfQLS2HWZyD8KitGvrFm7n9CpY80Y%3D&reserved=3D0>.

Having reviewed all of the responses, the chairs believe that enough suppor=
t was received to adopt this document into the WG. However, while the docum=
ent is informational in nature, it does have a normative dependency on http=
s://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segments/<htt=
ps://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracke=
r.ietf.org%2Fdoc%2Fdraft-ietf-spring-resource-aware-segments%2F&data=3D04%7=
C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908405837f408d8ceadef29%7=
C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593751248808%7CUnknown%7C=
TWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0=
%3D%7C1000&sdata=3Dtco%2FwwumvVZ%2FbtvVutDh8Dzl3PseJM9X2Q%2FUhXvfR8Q%3D&res=
erved=3D0> which will need to successfully complete WG LC before this docum=
ent will be able to progress from the WG queue. The chairs feel that more w=
ork is necessary in terms of definition and interoperability of resource-aw=
are SIDs. In addition several comments were received during the adoption ca=
ll that will need to be addressed as the document progresses through the WG=
 process. Further, the chairs would like to make it clear that adopting an =
informational document that proposes a particular solution which utilizes r=
esource-aware SIDs does *not* preclude future adoption of other documents w=
hich propose a different solution if the trade-offs are significantly diffe=
rent.

Authors, please resubmit the document as draft-spring-sr-for-enhanced-vpn-0=
0 and also provide explicit confirmation as to whether you are aware of any=
 IPR related to this document.

Regards,

Jim, Joel & Bruno


From: James Guichard <james.n.guichard@futurewei.com<mailto:james.n.guichar=
d@futurewei.com>>
Sent: Wednesday, January 27, 2021 5:47 AM
To: spring@ietf.org<mailto:spring@ietf.org>
Cc: spring-chairs@ietf.org<mailto:spring-chairs@ietf.org>
Subject: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn

Dear WG:

This message starts a 2 week WG adoption call for https://datatracker.ietf.=
org/doc/draft-dong-spring-sr-for-enhanced-vpn/<https://nam11.safelinks.prot=
ection.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-=
dong-spring-sr-for-enhanced-vpn%2F&data=3D04%7C01%7Cjames.n.guichard%40futu=
rewei.com%7C4aefbabc297942dc563408d8c2b93697%7C0fee8ff2a3b240189c753a1d5591=
fedc%7C1%7C0%7C637473448047191786%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwM=
DAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DCW%2BREIvA=
YGW5RqEptdCZk4Q%2Ba1%2F4ta1XOa%2FzwEQjq1I%3D&reserved=3D0> ending February =
10th 2021.

After review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, plea=
se state this explicitly. This gives the chairs an indication of the energy=
 level of people in the working group willing to work on this document. Ple=
ase also provide comments/reasons for your support (or lack thereof) as thi=
s is a stronger way to indicate your (non) support as this is not a vote.

Thanks!

Jim, Bruno & Joel




--_000_5A5B4DE12C0DAC44AF501CD9A2B01A8D939E0775DGGEMM532MBXchi_
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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Hi All,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">I am not aware of any undisclosed IPR.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Best regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zhenbin (Robin)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><span lang=
=3D"EN-US"> spring [<a href=3D"mailto:spring-bounces@ietf.org">mailto:sprin=
g-bounces@ietf.org</a>]
<b>On Behalf Of </b>James Guichard<br>
<b>Sent:</b> Friday, February 12, 2021 1:06 AM<br>
<b>To:</b> James Guichard &lt;<a href=3D"mailto:james.n.guichard@futurewei.=
com">james.n.guichard@futurewei.com</a>&gt;;
<a href=3D"mailto:spring@ietf.org">spring@ietf.org</a><br>
<b>Cc:</b> <a href=3D"mailto:spring-chairs@ietf.org">spring-chairs@ietf.org=
</a><br>
<b>Subject:</b> [spring] Completion of WG Adoption Call for draft-dong-spri=
ng-sr-for-enhanced-vpn<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear WG:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">This email ends the 2 week WG a=
doption call for
<a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2=
F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&a=
mp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908405837f4=
08d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C63748659375124880=
8%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1ha=
WwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DAMf3lLJFjUUxSJLfQLS2HWZyD8KitGvrFm7n9C=
pY80Y%3D&amp;reserved=3D0">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
. <o:p>
</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Having reviewed all of the resp=
onses, the chairs believe that enough support was received to adopt this do=
cument into the WG. However, while the document is informational in nature,=
 it does have a normative dependency
 on <a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%=
3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-spring-resource-aware-segme=
nts%2F&amp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908=
405837f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593=
751248808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBT=
iI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3Dtco%2FwwumvVZ%2FbtvVutDh8Dzl3P=
seJM9X2Q%2FUhXvfR8Q%3D&amp;reserved=3D0">
https://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segments/=
</a> which will need to successfully complete WG LC before this document wi=
ll be able to progress from the WG queue. The chairs feel that more work is=
 necessary in terms of definition
 and interoperability of resource-aware SIDs. In addition several comments =
were received during the adoption call that will need to be addressed as th=
e document progresses through the WG process. Further, the chairs would lik=
e to make it clear that adopting
 an informational document that proposes a particular solution which utiliz=
es resource-aware SIDs does *<b>not</b>* preclude future adoption of other =
documents which propose a different solution if the trade-offs are signific=
antly different.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Authors, please resubmit the do=
cument as draft-spring-sr-for-enhanced-vpn-00 and also provide explicit con=
firmation as to whether you are aware of any IPR related to this document.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Jim, Joel &amp; Bruno<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><span lang=
=3D"EN-US"> James Guichard &lt;<a href=3D"mailto:james.n.guichard@futurewei=
.com">james.n.guichard@futurewei.com</a>&gt;
<br>
<b>Sent:</b> Wednesday, January 27, 2021 5:47 AM<br>
<b>To:</b> <a href=3D"mailto:spring@ietf.org">spring@ietf.org</a><br>
<b>Cc:</b> <a href=3D"mailto:spring-chairs@ietf.org">spring-chairs@ietf.org=
</a><br>
<b>Subject:</b> WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn<=
o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear WG:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">This message starts a 2 week WG=
 adoption call for
<a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2=
F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&a=
mp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C4aefbabc297942dc5634=
08d8c2b93697%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C63747344804719178=
6%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1ha=
WwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DCW%2BREIvAYGW5RqEptdCZk4Q%2Ba1%2F4ta1X=
Oa%2FzwEQjq1I%3D&amp;reserved=3D0">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">After review of the document pl=
ease indicate support (or not) for WG adoption to the mailing list and if y=
ou are willing to work on the document, please state this explicitly. This =
gives the chairs an indication of the
 energy level of people in the working group willing to work on this docume=
nt. Please also provide comments/reasons for your support (or lack thereof)=
 as this is a stronger way to indicate your (non) support as this is not a =
vote.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Jim, Bruno &amp; Joel<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
</div>
</body>
</html>

--_000_5A5B4DE12C0DAC44AF501CD9A2B01A8D939E0775DGGEMM532MBXchi_--


From nobody Tue Feb 16 20:28:18 2021
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From: "qinfengwei" <qinfengwei@chinamobile.com>
To: "'James Guichard'" <james.n.guichard@futurewei.com>, <spring@ietf.org>
Cc: <spring-chairs@ietf.org>
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Date: Wed, 17 Feb 2021 12:28:07 +0800
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Hi,

=20

I am not aware of any undisclosed IPR.

=20

=20

=20

Thanks,

Fengwei Qin

=20

=B7=A2=BC=FE=C8=CB: spring [mailto:spring-bounces@ietf.org] =B4=FA=B1=ED =
James Guichard
=B7=A2=CB=CD=CA=B1=BC=E4: 2021=C4=EA2=D4=C212=C8=D5 01:06
=CA=D5=BC=FE=C8=CB: James Guichard; spring@ietf.org
=B3=AD=CB=CD: spring-chairs@ietf.org
=D6=F7=CC=E2: [spring] Completion of WG Adoption Call for
draft-dong-spring-sr-for-enhanced-vpn

=20

Dear WG:

=20

This email ends the 2 week WG adoption call for
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/
<https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdata=
track
er.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&data=3D04%7C=
01%7C
james.n.guichard%40futurewei.com%7C9be5d4dab908405837f408d8ceadef29%7C0fe=
e8f
f2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593751248808%7CUnknown%7CTWFpb=
GZs
b3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C=
100
0&sdata=3DAMf3lLJFjUUxSJLfQLS2HWZyD8KitGvrFm7n9CpY80Y%3D&reserved=3D0> . =


=20

Having reviewed all of the responses, the chairs believe that enough =
support
was received to adopt this document into the WG. However, while the =
document
is informational in nature, it does have a normative dependency on
https://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segment=
s/
<https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdata=
track
er.ietf.org%2Fdoc%2Fdraft-ietf-spring-resource-aware-segments%2F&data=3D0=
4%7C0
1%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908405837f408d8ceadef29%7=
C0f
ee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593751248808%7CUnknown%7CT=
WFp
bGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3=
D%7
C1000&sdata=3Dtco%2FwwumvVZ%2FbtvVutDh8Dzl3PseJM9X2Q%2FUhXvfR8Q%3D&reserv=
ed=3D0>
which will need to successfully complete WG LC before this document will =
be
able to progress from the WG queue. The chairs feel that more work is
necessary in terms of definition and interoperability of resource-aware
SIDs. In addition several comments were received during the adoption =
call
that will need to be addressed as the document progresses through the WG
process. Further, the chairs would like to make it clear that adopting =
an
informational document that proposes a particular solution which =
utilizes
resource-aware SIDs does *not* preclude future adoption of other =
documents
which propose a different solution if the trade-offs are significantly
different.

=20

Authors, please resubmit the document as =
draft-spring-sr-for-enhanced-vpn-00
and also provide explicit confirmation as to whether you are aware of =
any
IPR related to this document.

=20

Regards,

=20

Jim, Joel & Bruno

=20

=20

From: James Guichard <james.n.guichard@futurewei.com>=20
Sent: Wednesday, January 27, 2021 5:47 AM
To: spring@ietf.org
Cc: spring-chairs@ietf.org
Subject: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn

=20

Dear WG:

=20

This message starts a 2 week WG adoption call for
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/
<https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdata=
track
er.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&data=3D04%7C=
01%7C
james.n.guichard%40futurewei.com%7C4aefbabc297942dc563408d8c2b93697%7C0fe=
e8f
f2a3b240189c753a1d5591fedc%7C1%7C0%7C637473448047191786%7CUnknown%7CTWFpb=
GZs
b3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C=
100
0&sdata=3DCW%2BREIvAYGW5RqEptdCZk4Q%2Ba1%2F4ta1XOa%2FzwEQjq1I%3D&reserved=
=3D0>
ending February 10th 2021.

=20

After review of the document please indicate support (or not) for WG
adoption to the mailing list and if you are willing to work on the =
document,
please state this explicitly. This gives the chairs an indication of the
energy level of people in the working group willing to work on this
document. Please also provide comments/reasons for your support (or lack
thereof) as this is a stronger way to indicate your (non) support as =
this is
not a vote.

=20

Thanks!

=20

Jim, Bruno & Joel

=20

=20

=20


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</o:shapelayout></xml><![endif]--></head><body lang=3DZH-CN =
link=3D"#0563C1" vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;color:#1F497D'>Hi,<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;color:#1F497D'>I am not aware of any =
undisclosed IPR.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;color:#1F497D'><o:p>&nbsp;</o:p></span></p><div=
><p class=3DMsoNormal =
style=3D'text-align:justify;text-justify:inter-ideograph'><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;color:black'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal =
style=3D'text-align:justify;text-justify:inter-ideograph'><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;color:black'>Thanks,<o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'text-align:justify;text-justify:inter-ideograph'><span =
lang=3DEN-US style=3D'font-size:10.5pt;color:black'>Fengwei =
Qin<o:p></o:p></span></p></div><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;color:#1F497D'><o:p>&nbsp;</o:p></span></p><div=
><div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt =
0cm 0cm 0cm'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:SimSun'>=B7=A2=BC=FE=C8=CB<span =
lang=3DEN-US>:</span></span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:SimSun'> spring =
[mailto:spring-bounces@ietf.org] </span><b><span =
style=3D'font-size:10.0pt;font-family:SimSun'>=B4=FA=B1=ED =
</span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:SimSun'>James =
Guichard<br></span><b><span =
style=3D'font-size:10.0pt;font-family:SimSun'>=B7=A2=CB=CD=CA=B1=BC=E4<sp=
an lang=3DEN-US>:</span></span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:SimSun'> 2021</span><span =
style=3D'font-size:10.0pt;font-family:SimSun'>=C4=EA<span =
lang=3DEN-US>2</span>=D4=C2<span lang=3DEN-US>12</span>=C8=D5<span =
lang=3DEN-US> 01:06<br></span><b>=CA=D5=BC=FE=C8=CB<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> James Guichard; =
spring@ietf.org<br></span><b>=B3=AD=CB=CD<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> =
spring-chairs@ietf.org<br></span><b>=D6=F7=CC=E2<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> [spring] Completion of WG =
Adoption Call for =
draft-dong-spring-sr-for-enhanced-vpn<o:p></o:p></span></span></p></div><=
/div><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Dear WG:<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>This email ends the 2 week WG adoption call for <a =
href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F=
%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&=
amp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab90840583=
7f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593751=
248808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTi=
I6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DAMf3lLJFjUUxSJLfQLS2HWZyD8Kit=
GvrFm7n9CpY80Y%3D&amp;reserved=3D0">https://datatracker.ietf.org/doc/draf=
t-dong-spring-sr-for-enhanced-vpn/</a>. <o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Having reviewed all of the =
responses, the chairs believe that enough support was received to adopt =
this document into the WG. However, while the document is informational =
in nature, it does have a normative dependency on <a =
href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F=
%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-spring-resource-aware-segments=
%2F&amp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab9084=
05837f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C63748659=
3751248808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLC=
JBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3Dtco%2FwwumvVZ%2FbtvVutDh8=
Dzl3PseJM9X2Q%2FUhXvfR8Q%3D&amp;reserved=3D0">https://datatracker.ietf.or=
g/doc/draft-ietf-spring-resource-aware-segments/</a> which will need to =
successfully complete WG LC before this document will be able to =
progress from the WG queue. The chairs feel that more work is necessary =
in terms of definition and interoperability of resource-aware SIDs. In =
addition several comments were received during the adoption call that =
will need to be addressed as the document progresses through the WG =
process. Further, the chairs would like to make it clear that adopting =
an informational document that proposes a particular solution which =
utilizes resource-aware SIDs does *<b>not</b>* preclude future adoption =
of other documents which propose a different solution if the trade-offs =
are significantly different.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Authors, please resubmit the =
document as draft-spring-sr-for-enhanced-vpn-00 and also provide =
explicit confirmation as to whether you are aware of any IPR related to =
this document.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Regards,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Jim, Joel &amp; Bruno<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span =
lang=3DEN-US>From:</span></b><span lang=3DEN-US> James Guichard =
&lt;james.n.guichard@futurewei.com&gt; <br><b>Sent:</b> Wednesday, =
January 27, 2021 5:47 AM<br><b>To:</b> spring@ietf.org<br><b>Cc:</b> =
spring-chairs@ietf.org<br><b>Subject:</b> WG Adoption Call for =
draft-dong-spring-sr-for-enhanced-vpn<o:p></o:p></span></p></div></div><p=
 class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Dear WG:<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>This message starts a 2 week WG =
adoption call for <a =
href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F=
%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&=
amp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C4aefbabc297942dc5=
63408d8c2b93697%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637473448047=
191786%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTi=
I6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DCW%2BREIvAYGW5RqEptdCZk4Q%2Ba=
1%2F4ta1XOa%2FzwEQjq1I%3D&amp;reserved=3D0">https://datatracker.ietf.org/=
doc/draft-dong-spring-sr-for-enhanced-vpn/</a> ending February =
10<sup>th</sup> 2021.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>After review of the document please indicate support (or =
not) for WG adoption to the mailing list and if you are willing to work =
on the document, please state this explicitly. This gives the chairs an =
indication of the energy level of people in the working group willing to =
work on this document. Please also provide comments/reasons for your =
support (or lack thereof) as this is a stronger way to indicate your =
(non) support as this is not a vote.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Thanks!<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Jim, Bruno &amp; =
Joel<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p></div></body></html>
------=_NextPart_000_04CB_01D70528.59768810--




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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Tue, 16 Feb 2021 23:38:22 -0800
Message-ID: <CA+RyBmV0kuVyGLu=aEMbL0zYsOaavdOuH6aM+K9D7HGVzK=OzQ@mail.gmail.com>
To: Bruno Decraene <bruno.decraene@orange.com>
Cc: "spring@ietf.org" <spring@ietf.org>,  "draft-ietf-spring-nsh-sr@ietf.org" <draft-ietf-spring-nsh-sr@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/TtkYuNfK_M1PVezxzWEnpuU5eig>
Subject: Re: [spring] WG Last Call draft-ietf-spring-nsh-sr
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--00000000000057b18705bb834ea2
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Dear All,
I have several questions about the draft:

   - When using the approach described in Section 4, i.e., SR-based SFC
   with the integrated NSH, how does a re-Classifier scenario be handled? I=
f I
   understand it correctly, a re-Classifier can change the SPI of the
   NSH coming back from the SF. If that is the case, the SFF will not match=
 it
   to the saved SR information because the SPI had changed. How would SFF
   forward the NSH and the payload?
   - Related to the scenario from the above. The stored SR information that
   is not being used appears to become stale. It seems that it creates a le=
ak
   of resources in a system that should be controlled somehow.

Regards,
Greg

On Tue, Feb 9, 2021 at 10:31 AM <bruno.decraene@orange.com> wrote:

> Dear WG,
>
>
>
> This message starts a 2 weeks WG last call for draft-ietf-spring-nsh-sr
> [1].
>
> After review of the document please indicate whether you believe this
> document should be progressed to the IESG.
>
>
>
> In addition to yes/no, please consider providing a technical review of
> this document; in particular if you care for this document.
>
> Indeed, since WG adoption, this document had benefited from little review=
s
> from the WG, so we need more review from the SPRING WG.
>
>
>
> If you are aware of an implementation of this document, please report the
> implementation either on the list or to the chairs so that the shepherd c=
an
> report implementations in the writeup.
>
>
>
> Note that I=E2=80=99ll forward that call to the SFC WG.
>
>
>
> Thanks!
>
>
>
> [1] https://tools.ietf.org/html/draft-ietf-spring-nsh-sr
>
>
>
> --Bruno
>
>
>
> _________________________________________________________________________=
________________________________________________
>
> Ce message et ses pieces jointes peuvent contenir des informations confid=
entielles ou privilegiees et ne doivent donc
> pas etre diffuses, exploites ou copies sans autorisation. Si vous avez re=
cu ce message par erreur, veuillez le signaler
> a l'expediteur et le detruire ainsi que les pieces jointes. Les messages =
electroniques etant susceptibles d'alteration,
> Orange decline toute responsabilite si ce message a ete altere, deforme o=
u falsifie. Merci.
>
> This message and its attachments may contain confidential or privileged i=
nformation that may be protected by law;
> they should not be distributed, used or copied without authorisation.
> If you have received this email in error, please notify the sender and de=
lete this message and its attachments.
> As emails may be altered, Orange is not liable for messages that have bee=
n modified, changed or falsified.
> Thank you.
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
>

--00000000000057b18705bb834ea2
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<div dir=3D"ltr">Dear All,<div>I have several questions about the draft:</d=
iv><div><ul><li>When using the approach described in Section 4, i.e., SR-ba=
sed SFC with the integrated NSH, how does=C2=A0a re-Classifier scenario be =
handled? If I understand it correctly, a re-Classifier can change the SPI o=
f the NSH=C2=A0coming back from the SF. If that is the case, the SFF will n=
ot match it to the saved SR information because=C2=A0the SPI had changed. H=
ow would SFF forward the NSH=C2=A0and the payload?</li><li>Related to the s=
cenario from the above. The stored SR information that is not being used ap=
pears to become stale. It seems that it creates a leak of resources in a sy=
stem that should be controlled somehow.</li></ul><div>Regards,</div></div><=
div>Greg</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=
=3D"gmail_attr">On Tue, Feb 9, 2021 at 10:31 AM &lt;<a href=3D"mailto:bruno=
.decraene@orange.com">bruno.decraene@orange.com</a>&gt; wrote:<br></div><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-lef=
t:1px solid rgb(204,204,204);padding-left:1ex">







<div lang=3D"FR">
<div class=3D"gmail-m_-3529215363276776829WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-GB">Dear WG, <u></u>
<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">This message starts a 2 weeks W=
G last call for draft-<span class=3D"gmail-m_-3529215363276776829SpellE">ie=
tf</span>-spring-<span class=3D"gmail-m_-3529215363276776829SpellE">nsh</sp=
an>-<span class=3D"gmail-m_-3529215363276776829SpellE">sr</span> [1].<u></u=
><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">After review of the document pl=
ease indicate whether you believe this document should be progressed to the=
 IESG.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">In addition to yes/no, please c=
onsider providing a technical review of this document; in particular if you=
 care for this document.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">Indeed, since WG adoption, this=
 document had benefited from little reviews from the WG, so we need more re=
view from the SPRING WG.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">If you are aware of an implemen=
tation of this document, please report the implementation either on the lis=
t or to the chairs so that the shepherd can report implementations in the
<span class=3D"gmail-m_-3529215363276776829SpellE">writeup</span>.<u></u><u=
></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB">Note that I=E2=80=99ll forward =
that call to the SFC WG.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span class=3D"gmail-m_-3529215363276776829SpellE">T=
hanks</span>!<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[1] <a href=3D"https://tools.ietf.org/html/draft-iet=
f-spring-nsh-sr" target=3D"_blank">
https://tools.ietf.org/html/draft-ietf-spring-nsh-sr</a><u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">--Bruno<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<pre>______________________________________________________________________=
___________________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler
a l&#39;expediteur et le detruire ainsi que les pieces jointes. Les message=
s electroniques etant susceptibles d&#39;alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;
they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and dele=
te this message and its attachments.
As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.
Thank you.
</pre></div>

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

--00000000000057b18705bb834ea2--


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From: "Weiqiang Cheng" <chengweiqiang@chinamobile.com>
To: "'Weiqiang Cheng'" <chengweiqiang@chinamobile.com>, <spring@ietf.org>, <6man@ietf.org>
Cc: "'srcomp'" <srcomp@ietf.org>
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Date: Wed, 17 Feb 2021 20:50:14 +0800
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/Ney9KTXg2GGIxETD1s0l6jhugic>
Subject: Re: [spring] Calling for the candidate drafts for the analysis draft of comperssion segment routing information for use over IPv6
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Hi Groups,

We did not received any other additional proposals for the compression
segment routing information for use over IPv6 before Feb 12, 2021.

The following mechanisms will be proposed to be involved in analysis =
draft:=20

o       draft-filsfilscheng-spring-srv6-srh-comp-sl-enc [1]

o       draft-decraene-spring-srv6-vlsid [2]

o       draft-bonica-6man-comp-rtg-hdr [3]

o       draft-mirsky-6man-unified-id-sr [4]

=20

B.R.

=20

Weiqiang Cheng on behalf of design team

=20

[1]
https://www.ietf.org/archive/id/draft-filsfilscheng-spring-srv6-srh-comp-=
sl-
enc-02.txt

[2] =
https://www.ietf.org/archive/id/draft-decraene-spring-srv6-vlsid-04.txt

[3] =
https://www.ietf.org/archive/id/draft-bonica-6man-comp-rtg-hdr-24.txt

[4] =
https://www.ietf.org/archive/id/draft-mirsky-6man-unified-id-sr-08.txt

=20

=20

=B7=A2=BC=FE=C8=CB: spring [mailto:spring-bounces@ietf.org] =B4=FA=B1=ED =
Weiqiang Cheng
=B7=A2=CB=CD=CA=B1=BC=E4: 2021=C4=EA1=D4=C229=C8=D5 11:24
=CA=D5=BC=FE=C8=CB: spring@ietf.org; 6man@ietf.org
=B3=AD=CB=CD: 'srcomp'
=D6=F7=CC=E2: [spring] Calling for the candidate drafts for the analysis =
draft of
comperssion segment routing information for use over IPv6

=20

Hi Working Groups=A3=AC

=20

As the work scope of the design team for compressing segment routing
information for use over IPv6, we will output two drafts:

1)      The requirements draft, -03 version is ready [1]

2)      The analysis draft, to analyze the existed approaches for
compressing segment routing information for use over IPv6

=20

The compression design team is starting preparations for the analysis
document and the first action is to determine the list of drafts being
analyzed.

=20

We start calling for the candidate drafts which should be analyzed in =
the
analysis document in SPRING WG and 6MAN WG for two weeks (ending Feb 12,
2021)

=20

As far as we know, the design team has prepared the following initial =
list:

o       draft-filsfilscheng-spring-srv6-srh-comp-sl-enc [2]

o       draft-decraene-spring-srv6-vlsid [3]

o       draft-bonica-6man-comp-rtg-hdr [4]

o       draft-mirsky-6man-unified-id-sr [5]

=20

Please reply the mail and let us know any other draft that was not =
listed
above.=20

=20

Note:

The draft should have been post before 15 January 2021

=20

=20

[1]
https://www.ietf.org/archive/id/draft-srcompdt-spring-compression-require=
men
t-03.txt

[2]
https://www.ietf.org/archive/id/draft-filsfilscheng-spring-srv6-srh-comp-=
sl-
enc-02.txt

[3] =
https://www.ietf.org/archive/id/draft-decraene-spring-srv6-vlsid-04.txt

[4] =
https://www.ietf.org/archive/id/draft-bonica-6man-comp-rtg-hdr-24.txt

[5] =
https://www.ietf.org/archive/id/draft-mirsky-6man-unified-id-sr-08.txt

=20

=20

Weiqiang Cheng on behalf of design team


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vlink=3Dpurple style=3D'text-justify-trim:punctuation'><div =
class=3DWordSection1><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:#1F497D'>Hi Groups,<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US style=3D'color:#1F497D'>We did not =
received any other additional proposals for the compression segment =
routing information for use over IPv6 before Feb 12, =
2021.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:#1F497D'>The following mechanisms will be proposed to be =
involved in analysis draft: <o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:#1F497D'>o&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
draft-filsfilscheng-spring-srv6-srh-comp-sl-enc =
[1]<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:#1F497D'>o&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
draft-decraene-spring-srv6-vlsid [2]<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:#1F497D'>o&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
draft-bonica-6man-comp-rtg-hdr [3]<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:#1F497D'>o&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
draft-mirsky-6man-unified-id-sr [4]<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:#1F497D'>B.R.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US style=3D'color:#1F497D'>Weiqiang =
Cheng on behalf of design team<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>[1] <a =
href=3D"https://www.ietf.org/archive/id/draft-filsfilscheng-spring-srv6-s=
rh-comp-sl-enc-02.txt">https://www.ietf.org/archive/id/draft-filsfilschen=
g-spring-srv6-srh-comp-sl-enc-02.txt</a><o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>[2] <a =
href=3D"https://www.ietf.org/archive/id/draft-decraene-spring-srv6-vlsid-=
04.txt">https://www.ietf.org/archive/id/draft-decraene-spring-srv6-vlsid-=
04.txt</a><o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>[3] <a =
href=3D"https://www.ietf.org/archive/id/draft-bonica-6man-comp-rtg-hdr-24=
.txt">https://www.ietf.org/archive/id/draft-bonica-6man-comp-rtg-hdr-24.t=
xt</a><o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US>[4] =
<a =
href=3D"https://www.ietf.org/archive/id/draft-mirsky-6man-unified-id-sr-0=
8.txt">https://www.ietf.org/archive/id/draft-mirsky-6man-unified-id-sr-08=
.txt</a><o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal align=3Dleft =
style=3D'text-align:left'><b><span =
style=3D'font-size:10.0pt;font-family:=CB=CE=CC=E5'>=B7=A2=BC=FE=C8=CB<sp=
an lang=3DEN-US>:</span></span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:=CB=CE=CC=E5'> spring =
[mailto:spring-bounces@ietf.org] </span><b><span =
style=3D'font-size:10.0pt;font-family:=CB=CE=CC=E5'>=B4=FA=B1=ED =
</span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:=CB=CE=CC=E5'>Weiqiang =
Cheng<br></span><b><span =
style=3D'font-size:10.0pt;font-family:=CB=CE=CC=E5'>=B7=A2=CB=CD=CA=B1=BC=
=E4<span lang=3DEN-US>:</span></span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:=CB=CE=CC=E5'> 2021</span><span =
style=3D'font-size:10.0pt;font-family:=CB=CE=CC=E5'>=C4=EA<span =
lang=3DEN-US>1</span>=D4=C2<span lang=3DEN-US>29</span>=C8=D5<span =
lang=3DEN-US> 11:24<br></span><b>=CA=D5=BC=FE=C8=CB<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> spring@ietf.org; =
6man@ietf.org<br></span><b>=B3=AD=CB=CD<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> =
'srcomp'<br></span><b>=D6=F7=CC=E2<span lang=3DEN-US>:</span></b><span =
lang=3DEN-US> [spring] Calling for the candidate drafts for the analysis =
draft of comperssion segment routing information for use over =
IPv6<o:p></o:p></span></span></p></div></div><p class=3DMsoNormal =
align=3Dleft style=3D'text-align:left'><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Hi Working Groups</span><span =
style=3D'font-family:=CB=CE=CC=E5'>=A3=AC</span><span =
lang=3DEN-US><o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>As the work scope of the design team for compressing =
segment routing information for use over IPv6, we will output two =
drafts:<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>1)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The requirements draft, =
-03 version is ready [1]<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>2)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The analysis draft, to =
analyze the existed approaches for compressing segment routing =
information for use over IPv6<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>The compression design team is =
starting preparations for the analysis document and the first action is =
to determine the list of drafts being analyzed.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>We start calling for the candidate =
drafts which should be analyzed in the analysis document in SPRING WG =
and 6MAN WG for two weeks (ending Feb 12, 2021)<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>As far as we know, the design team =
has prepared the following initial list:<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
lang=3DEN-US>o&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
draft-filsfilscheng-spring-srv6-srh-comp-sl-enc =
[2]<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>o&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
draft-decraene-spring-srv6-vlsid [3]<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
lang=3DEN-US>o&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
draft-bonica-6man-comp-rtg-hdr [4]<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
lang=3DEN-US>o&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
draft-mirsky-6man-unified-id-sr [5]<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Please reply the mail and let us =
know any other draft that was not listed above. <o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Note:<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>The draft should have been post =
before 15 January 2021<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>[1] <a =
href=3D"https://www.ietf.org/archive/id/draft-srcompdt-spring-compression=
-requirement-03.txt">https://www.ietf.org/archive/id/draft-srcompdt-sprin=
g-compression-requirement-03.txt</a><o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>[2] <a =
href=3D"https://www.ietf.org/archive/id/draft-filsfilscheng-spring-srv6-s=
rh-comp-sl-enc-02.txt">https://www.ietf.org/archive/id/draft-filsfilschen=
g-spring-srv6-srh-comp-sl-enc-02.txt</a><o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>[3] <a =
href=3D"https://www.ietf.org/archive/id/draft-decraene-spring-srv6-vlsid-=
04.txt">https://www.ietf.org/archive/id/draft-decraene-spring-srv6-vlsid-=
04.txt</a><o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>[4] <a =
href=3D"https://www.ietf.org/archive/id/draft-bonica-6man-comp-rtg-hdr-24=
.txt">https://www.ietf.org/archive/id/draft-bonica-6man-comp-rtg-hdr-24.t=
xt</a><o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US>[5] =
<a =
href=3D"https://www.ietf.org/archive/id/draft-mirsky-6man-unified-id-sr-0=
8.txt">https://www.ietf.org/archive/id/draft-mirsky-6man-unified-id-sr-08=
.txt</a><o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Weiqiang Cheng on behalf of design =
team<o:p></o:p></span></p></div></body></html>
------=_NextPart_000_0B08_01D7056E.7DFE7AD0--




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<div><span style=3D"font-family: Calibri, sans-serif; font-size: 14.6667px;=
 line-height: normal;"><br></span></div><div><span style=3D"font-family: Ca=
libri, sans-serif; font-size: 14.6667px; line-height: normal;">Alot thanks =
to our dear chairs and all the experts of this WG.</span></div><div><span><=
/span><span style=3D"font-family: Calibri, sans-serif; font-size: 14.6667px=
; line-height: normal;">I am not aware of any IPR related to this document.=
</span></div>=0A=
<div><br></div><div>Best Regards,</div><div>Zhenqiang Li</div><hr style=3D"=
width: 210px; height: 1px;" color=3D"#b5c4df" size=3D"1" align=3D"left">=0A=
<div><span><div style=3D"MARGIN: 10px; FONT-FAMILY: verdana; FONT-SIZE: 10p=
t"><div>li_zhenqiang@hotmail.com</div></div></span></div>=0A=
<blockquote style=3D"margin-Top: 0px; margin-Bottom: 0px; margin-Left: 0.5e=
m"><div>&nbsp;</div><div style=3D"border:none;border-top:solid #B5C4DF 1.0p=
t;padding:3.0pt 0cm 0cm 0cm"><div style=3D"PADDING-RIGHT: 8px; PADDING-LEFT=
: 8px; FONT-SIZE: 12px;FONT-FAMILY:tahoma;COLOR:#000000; BACKGROUND: #efefe=
f; PADDING-BOTTOM: 8px; PADDING-TOP: 8px"><div><b>From:</b>&nbsp;<a href=3D=
"mailto:james.n.guichard@futurewei.com" style=3D"color: rgb(5, 99, 193); te=
xt-decoration: underline;">James Guichard</a></div><div><b>Date:</b>&nbsp;2=
021-02-12&nbsp;01:06</div><div><b>To:</b>&nbsp;<a href=3D"mailto:james.n.gu=
ichard@futurewei.com" style=3D"color: rgb(5, 99, 193); text-decoration: und=
erline;">James Guichard</a>; <a href=3D"mailto:spring@ietf.org" style=3D"co=
lor: rgb(5, 99, 193); text-decoration: underline;">spring@ietf.org</a></div=
><div><b>CC:</b>&nbsp;<a href=3D"mailto:spring-chairs@ietf.org" style=3D"co=
lor: rgb(5, 99, 193); text-decoration: underline;">spring-chairs@ietf.org</=
a></div><div><b>Subject:</b>&nbsp;[spring] Completion of WG Adoption Call f=
or draft-dong-spring-sr-for-enhanced-vpn</div></div></div><div><div class=
=3D"FoxDiv20210218090134161435">=0A=
<!--[if gte mso 9]><xml>=0A=
<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" ></o:shapedefaults>=0A=
</xml><![endif]--><!--[if gte mso 9]><xml>=0A=
<o:shapelayout v:ext=3D"edit">=0A=
<o:idmap v:ext=3D"edit" data=3D"1" ></o:idmap>=0A=
</o:shapelayout></xml><![endif]-->=0A=
<div class=3D"WordSection1" style=3D"page: WordSection1;">=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;">Dear WG:<o:p></o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;">This email ends the 2 week WG adoption call for <a hr=
ef=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fd=
atatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&amp;da=
ta=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908405837f408d8c=
eadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593751248808%7CU=
nknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLC=
JXVCI6Mn0%3D%7C1000&amp;sdata=3DAMf3lLJFjUUxSJLfQLS2HWZyD8KitGvrFm7n9CpY80Y=
%3D&amp;reserved=3D0" style=3D"color: rgb(5, 99, 193); text-decoration: und=
erline;">=0A=
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
. <o:p>=0A=
</o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;">Having reviewed all of the responses, the chairs beli=
eve that enough support was received to adopt this document into the WG. Ho=
wever, while the document is informational in nature, it does have a normat=
ive dependency on=0A=
<a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2=
F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-spring-resource-aware-segments%=
2F&amp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab9084058=
37f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C6374865937512=
48808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6I=
k1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3Dtco%2FwwumvVZ%2FbtvVutDh8Dzl3PseJM=
9X2Q%2FUhXvfR8Q%3D&amp;reserved=3D0" style=3D"color: rgb(5, 99, 193); text-=
decoration: underline;">=0A=
https://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segments/=
</a> which will need to successfully complete WG LC before this document wi=
ll be able to progress from the WG queue. The chairs feel that more work is=
 necessary in terms of definition=0A=
 and interoperability of resource-aware SIDs. In addition several comments =
were received during the adoption call that will need to be addressed as th=
e document progresses through the WG process. Further, the chairs would lik=
e to make it clear that adopting=0A=
 an informational document that proposes a particular solution which utiliz=
es resource-aware SIDs does *<b>not</b>* preclude future adoption of other =
documents which propose a different solution if the trade-offs are signific=
antly different.<o:p></o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;">Authors, please resubmit the document as draft-spring=
-sr-for-enhanced-vpn-00 and also provide explicit confirmation as to whethe=
r you are aware of any IPR related to this document.<o:p></o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;">Regards,<o:p></o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;">Jim, Joel &amp; Bruno<o:p></o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A=
<div>=0A=
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;"><b>From:</b> James Guichard &lt;james.n.guichard@futu=
rewei.com&gt;=0A=
<br>=0A=
<b>Sent:</b> Wednesday, January 27, 2021 5:47 AM<br>=0A=
<b>To:</b> spring@ietf.org<br>=0A=
<b>Cc:</b> spring-chairs@ietf.org<br>=0A=
<b>Subject:</b> WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn<=
o:p></o:p></p>=0A=
</div>=0A=
</div>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;">Dear WG:<o:p></o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;">This message starts a 2 week WG adoption call for <a =
href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2=
Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&amp;=
data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C4aefbabc297942dc563408d=
8c2b93697%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637473448047191786%7=
CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwi=
LCJXVCI6Mn0%3D%7C1000&amp;sdata=3DCW%2BREIvAYGW5RqEptdCZk4Q%2Ba1%2F4ta1XOa%=
2FzwEQjq1I%3D&amp;reserved=3D0" style=3D"color: rgb(5, 99, 193); text-decor=
ation: underline;">=0A=
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<o:p></o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;">After review of the document please indicate support =
(or not) for WG adoption to the mailing list and if you are willing to work=
 on the document, please state this explicitly. This gives the chairs an in=
dication of the energy level of people=0A=
 in the working group willing to work on this document. Please also provide=
 comments/reasons for your support (or lack thereof) as this is a stronger =
way to indicate your (non) support as this is not a vote.<o:p></o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;">Thanks!<o:p></o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;">Jim, Bruno &amp; Joel<o:p></o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A=
<p class=3D"MsoNormal" style=3D"margin: 0in; font-size: 11pt; font-family: =
Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A=
</div>=0A=
</div></div></blockquote>=0A=
</body></html>=

------=_001_NextPart122744604325_=------


From nobody Wed Feb 17 17:30:01 2021
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From: Huzhibo <huzhibo@huawei.com>
To: James Guichard <james.n.guichard@futurewei.com>, "spring@ietf.org" <spring@ietf.org>
CC: "spring-chairs@ietf.org" <spring-chairs@ietf.org>
Thread-Topic: Completion of WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Date: Thu, 18 Feb 2021 01:29:53 +0000
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Subject: Re: [spring] Completion of WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn
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Hi:
I am not aware of any IPR related to this document.

Thanks

Zhibo Hu
From: spring [mailto:spring-bounces@ietf.org] On Behalf Of James Guichard
Sent: Friday, February 12, 2021 1:06 AM
To: James Guichard <james.n.guichard@futurewei.com>; spring@ietf.org
Cc: spring-chairs@ietf.org
Subject: [spring] Completion of WG Adoption Call for draft-dong-spring-sr-f=
or-enhanced-vpn

Dear WG:

This email ends the 2 week WG adoption call for https://datatracker.ietf.or=
g/doc/draft-dong-spring-sr-for-enhanced-vpn/<https://nam11.safelinks.protec=
tion.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-do=
ng-spring-sr-for-enhanced-vpn%2F&data=3D04%7C01%7Cjames.n.guichard%40future=
wei.com%7C9be5d4dab908405837f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fe=
dc%7C1%7C0%7C637486593751248808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDA=
iLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DAMf3lLJFjUUx=
SJLfQLS2HWZyD8KitGvrFm7n9CpY80Y%3D&reserved=3D0>.

Having reviewed all of the responses, the chairs believe that enough suppor=
t was received to adopt this document into the WG. However, while the docum=
ent is informational in nature, it does have a normative dependency on http=
s://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segments/<htt=
ps://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracke=
r.ietf.org%2Fdoc%2Fdraft-ietf-spring-resource-aware-segments%2F&data=3D04%7=
C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908405837f408d8ceadef29%7=
C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593751248808%7CUnknown%7C=
TWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0=
%3D%7C1000&sdata=3Dtco%2FwwumvVZ%2FbtvVutDh8Dzl3PseJM9X2Q%2FUhXvfR8Q%3D&res=
erved=3D0> which will need to successfully complete WG LC before this docum=
ent will be able to progress from the WG queue. The chairs feel that more w=
ork is necessary in terms of definition and interoperability of resource-aw=
are SIDs. In addition several comments were received during the adoption ca=
ll that will need to be addressed as the document progresses through the WG=
 process. Further, the chairs would like to make it clear that adopting an =
informational document that proposes a particular solution which utilizes r=
esource-aware SIDs does *not* preclude future adoption of other documents w=
hich propose a different solution if the trade-offs are significantly diffe=
rent.

Authors, please resubmit the document as draft-spring-sr-for-enhanced-vpn-0=
0 and also provide explicit confirmation as to whether you are aware of any=
 IPR related to this document.

Regards,

Jim, Joel & Bruno


From: James Guichard <james.n.guichard@futurewei.com<mailto:james.n.guichar=
d@futurewei.com>>
Sent: Wednesday, January 27, 2021 5:47 AM
To: spring@ietf.org<mailto:spring@ietf.org>
Cc: spring-chairs@ietf.org<mailto:spring-chairs@ietf.org>
Subject: WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn

Dear WG:

This message starts a 2 week WG adoption call for https://datatracker.ietf.=
org/doc/draft-dong-spring-sr-for-enhanced-vpn/<https://nam11.safelinks.prot=
ection.outlook.com/?url=3Dhttps%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-=
dong-spring-sr-for-enhanced-vpn%2F&data=3D04%7C01%7Cjames.n.guichard%40futu=
rewei.com%7C4aefbabc297942dc563408d8c2b93697%7C0fee8ff2a3b240189c753a1d5591=
fedc%7C1%7C0%7C637473448047191786%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwM=
DAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DCW%2BREIvA=
YGW5RqEptdCZk4Q%2Ba1%2F4ta1XOa%2FzwEQjq1I%3D&reserved=3D0> ending February =
10th 2021.

After review of the document please indicate support (or not) for WG adopti=
on to the mailing list and if you are willing to work on the document, plea=
se state this explicitly. This gives the chairs an indication of the energy=
 level of people in the working group willing to work on this document. Ple=
ase also provide comments/reasons for your support (or lack thereof) as thi=
s is a stronger way to indicate your (non) support as this is not a vote.

Thanks!

Jim, Bruno & Joel




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</head>
<body lang=3D"ZH-CN" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Hi:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">I am not aware of any IPR related to this document.<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Thanks<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D">Zhibo Hu<o:p></o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><span lang=
=3D"EN-US"> spring [mailto:spring-bounces@ietf.org]
<b>On Behalf Of </b>James Guichard<br>
<b>Sent:</b> Friday, February 12, 2021 1:06 AM<br>
<b>To:</b> James Guichard &lt;james.n.guichard@futurewei.com&gt;; spring@ie=
tf.org<br>
<b>Cc:</b> spring-chairs@ietf.org<br>
<b>Subject:</b> [spring] Completion of WG Adoption Call for draft-dong-spri=
ng-sr-for-enhanced-vpn<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear WG:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">This email ends the 2 week WG a=
doption call for
<a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2=
F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&a=
mp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908405837f4=
08d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C63748659375124880=
8%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1ha=
WwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DAMf3lLJFjUUxSJLfQLS2HWZyD8KitGvrFm7n9C=
pY80Y%3D&amp;reserved=3D0">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
. <o:p>
</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Having reviewed all of the resp=
onses, the chairs believe that enough support was received to adopt this do=
cument into the WG. However, while the document is informational in nature,=
 it does have a normative dependency
 on <a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%=
3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-spring-resource-aware-segme=
nts%2F&amp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C9be5d4dab908=
405837f408d8ceadef29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637486593=
751248808%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBT=
iI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3Dtco%2FwwumvVZ%2FbtvVutDh8Dzl3P=
seJM9X2Q%2FUhXvfR8Q%3D&amp;reserved=3D0">
https://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segments/=
</a> which will need to successfully complete WG LC before this document wi=
ll be able to progress from the WG queue. The chairs feel that more work is=
 necessary in terms of definition
 and interoperability of resource-aware SIDs. In addition several comments =
were received during the adoption call that will need to be addressed as th=
e document progresses through the WG process. Further, the chairs would lik=
e to make it clear that adopting
 an informational document that proposes a particular solution which utiliz=
es resource-aware SIDs does *<b>not</b>* preclude future adoption of other =
documents which propose a different solution if the trade-offs are signific=
antly different.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Authors, please resubmit the do=
cument as draft-spring-sr-for-enhanced-vpn-00 and also provide explicit con=
firmation as to whether you are aware of any IPR related to this document.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Jim, Joel &amp; Bruno<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><span lang=
=3D"EN-US"> James Guichard &lt;<a href=3D"mailto:james.n.guichard@futurewei=
.com">james.n.guichard@futurewei.com</a>&gt;
<br>
<b>Sent:</b> Wednesday, January 27, 2021 5:47 AM<br>
<b>To:</b> <a href=3D"mailto:spring@ietf.org">spring@ietf.org</a><br>
<b>Cc:</b> <a href=3D"mailto:spring-chairs@ietf.org">spring-chairs@ietf.org=
</a><br>
<b>Subject:</b> WG Adoption Call for draft-dong-spring-sr-for-enhanced-vpn<=
o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear WG:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">This message starts a 2 week WG=
 adoption call for
<a href=3D"https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2=
F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-dong-spring-sr-for-enhanced-vpn%2F&a=
mp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C4aefbabc297942dc5634=
08d8c2b93697%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C63747344804719178=
6%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1ha=
WwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DCW%2BREIvAYGW5RqEptdCZk4Q%2Ba1%2F4ta1X=
Oa%2FzwEQjq1I%3D&amp;reserved=3D0">
https://datatracker.ietf.org/doc/draft-dong-spring-sr-for-enhanced-vpn/</a>=
 ending February 10<sup>th</sup> 2021.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">After review of the document pl=
ease indicate support (or not) for WG adoption to the mailing list and if y=
ou are willing to work on the document, please state this explicitly. This =
gives the chairs an indication of the
 energy level of people in the working group willing to work on this docume=
nt. Please also provide comments/reasons for your support (or lack thereof)=
 as this is a stronger way to indicate your (non) support as this is not a =
vote.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Jim, Bruno &amp; Joel<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
</body>
</html>

--_000_6ed64ef2d46c4b0f914d2372e3f1b4b6huaweicom_--


From nobody Thu Feb 18 05:22:52 2021
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Subject: [spring] I-D Action: draft-ietf-spring-sr-replication-segment-04.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 Source Packet Routing in Networking WG of the IETF.

        Title           : SR Replication Segment for Multi-point Service Delivery
        Authors         : Daniel Voyer
                          Clarence Filsfils
                          Rishabh Parekh
                          Hooman Bidgoli
                          Zhaohui Zhang
	Filename        : draft-ietf-spring-sr-replication-segment-04.txt
	Pages           : 13
	Date            : 2021-02-17

Abstract:
   This document describes the SR Replication segment for Multi-point
   service delivery.  A SR Replication segment allows a packet to be
   replicated from a Replication Node to downstream nodes.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-spring-sr-replication-segment/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-spring-sr-replication-segment-04
https://datatracker.ietf.org/doc/html/draft-ietf-spring-sr-replication-segment-04

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-spring-sr-replication-segment-04


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

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



From nobody Fri Feb 19 02:18:30 2021
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From: "Pengshuping (Peng Shuping)" <pengshuping@huawei.com>
To: "spring@ietf.org" <spring@ietf.org>
CC: "spring-chairs@ietf.org" <spring-chairs@ietf.org>
Thread-Topic: Presentation slot request in SPRING WG - IETF110
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Subject: Re: [spring] Presentation slot request in SPRING WG - IETF110
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Dear all,

Just a kind reminder if you haven't posted your request in the form.


https://docs.google.com/forms/d/e/1FAIpQLSfx2a78nDG_3uAhy2Piz665JY668T6I5uF=
Av8l0Mrb3SOSy0w/viewform<https://nam11.safelinks.protection.outlook.com/?ur=
l=3Dhttps%3A%2F%2Fdocs.google.com%2Fforms%2Fd%2Fe%2F1FAIpQLSfx2a78nDG_3uAhy=
2Piz665JY668T6I5uFAv8l0Mrb3SOSy0w%2Fviewform&data=3D04%7C01%7Cjames.n.guich=
ard%40futurewei.com%7C0c044258ac7444230de408d8cca2b1f2%7C0fee8ff2a3b240189c=
753a1d5591fedc%7C1%7C0%7C637484346452353876%7CUnknown%7CTWFpbGZsb3d8eyJWIjo=
iMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3D=
cKtd%2FPWNg2Itkp6IPo4eQtom2ld1NQu76x9Ss87Z6Nk%3D&reserved=3D0>

Please note, if you have already filled in the form, please also indicate t=
hat whether you have asked for a slot request in a different WG.

Thank you!

Best regards,
Shuping



From: Pengshuping (Peng Shuping)
Sent: Tuesday, February 9, 2021 10:16 PM
To: spring@ietf.org
Cc: 'spring-chairs@ietf.org' <spring-chairs@ietf.org>
Subject: Presentation slot request in SPRING WG - IETF110


Dear all,



We will continue to using the Google Form to collect presentation slot requ=
ests in the SPRING WG for this IETF110. Please fill in your request in the =
following Form.



https://docs.google.com/forms/d/e/1FAIpQLSfx2a78nDG_3uAhy2Piz665JY668T6I5uF=
Av8l0Mrb3SOSy0w/viewform<https://nam11.safelinks.protection.outlook.com/?ur=
l=3Dhttps%3A%2F%2Fdocs.google.com%2Fforms%2Fd%2Fe%2F1FAIpQLSfx2a78nDG_3uAhy=
2Piz665JY668T6I5uFAv8l0Mrb3SOSy0w%2Fviewform&data=3D04%7C01%7Cjames.n.guich=
ard%40futurewei.com%7C0c044258ac7444230de408d8cca2b1f2%7C0fee8ff2a3b240189c=
753a1d5591fedc%7C1%7C0%7C637484346452353876%7CUnknown%7CTWFpbGZsb3d8eyJWIjo=
iMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3D=
cKtd%2FPWNg2Itkp6IPo4eQtom2ld1NQu76x9Ss87Z6Nk%3D&reserved=3D0>



If there is any issue for you to access this Form, please send your request=
 directly to spring-chairs@ietf.org<mailto:spring-chairs@ietf.org>.



Thank you!



Best regards,

Shuping


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pre
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<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext=3D"edit">
<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=3D"ZH-CN" link=3D"#0563C1" vlink=3D"#954F72" style=3D"text-justi=
fy-trim:punctuation">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Dear al=
l, <o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Just a =
kind reminder if you haven&#8217;t posted your request in the form.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:10.=
5pt;font-family:&quot;Calibri&quot;,sans-serif;color:#212529"><a href=3D"ht=
tps://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fdocs.goog=
le.com%2Fforms%2Fd%2Fe%2F1FAIpQLSfx2a78nDG_3uAhy2Piz665JY668T6I5uFAv8l0Mrb3=
SOSy0w%2Fviewform&amp;data=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C0=
c044258ac7444230de408d8cca2b1f2%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%=
7C637484346452353876%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2=
luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DcKtd%2FPWNg2Itkp6IP=
o4eQtom2ld1NQu76x9Ss87Z6Nk%3D&amp;reserved=3D0">https://docs.google.com/for=
ms/d/e/1FAIpQLSfx2a78nDG_3uAhy2Piz665JY668T6I5uFAv8l0Mrb3SOSy0w/viewform</a=
> <o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Please =
note, if you have already filled in the form, please also indicate that whe=
ther you have asked for a slot request in a different WG.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Thank y=
ou! <o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Best re=
gards, <o:p>
</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D">Shuping=
 <o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#1F497D"><o:p>&n=
bsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><b><span la=
ng=3D"EN-US" style=3D"font-size:11.0pt">From:</span></b><span lang=3D"EN-US=
" style=3D"font-size:11.0pt"> Pengshuping (Peng Shuping)
<br>
<b>Sent:</b> Tuesday, February 9, 2021 10:16 PM<br>
<b>To:</b> spring@ietf.org<br>
<b>Cc:</b> 'spring-chairs@ietf.org' &lt;spring-chairs@ietf.org&gt;<br>
<b>Subject:</b> Presentation slot request in SPRING WG - IETF110<o:p></o:p>=
</span></p>
</div>
</div>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529">Dear all,<o:p></o:p></span></pre>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529"><o:p>&nbsp;</o:p></span></pre>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529">We will continue to using the Google=
 Form to collect presentation slot requests in the SPRING WG for this IETF1=
10. Please fill in your request in the following Form.<o:p></o:p></span></p=
re>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529"><o:p>&nbsp;</o:p></span></pre>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529"><a href=3D"https://nam11.safelinks.p=
rotection.outlook.com/?url=3Dhttps%3A%2F%2Fdocs.google.com%2Fforms%2Fd%2Fe%=
2F1FAIpQLSfx2a78nDG_3uAhy2Piz665JY668T6I5uFAv8l0Mrb3SOSy0w%2Fviewform&amp;d=
ata=3D04%7C01%7Cjames.n.guichard%40futurewei.com%7C0c044258ac7444230de408d8=
cca2b1f2%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637484346452353876%7C=
Unknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiL=
CJXVCI6Mn0%3D%7C1000&amp;sdata=3DcKtd%2FPWNg2Itkp6IPo4eQtom2ld1NQu76x9Ss87Z=
6Nk%3D&amp;reserved=3D0">https://docs.google.com/forms/d/e/1FAIpQLSfx2a78nD=
G_3uAhy2Piz665JY668T6I5uFAv8l0Mrb3SOSy0w/viewform</a><o:p></o:p></span></pr=
e>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529"><o:p>&nbsp;</o:p></span></pre>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529">If there is any issue for you to acc=
ess this Form, please send your request directly to <a href=3D"mailto:sprin=
g-chairs@ietf.org"><span style=3D"color:#337AB7">spring-chairs@ietf.org</sp=
an></a>.<o:p></o:p></span></pre>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529"><o:p>&nbsp;</o:p></span></pre>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529">Thank you!<o:p></o:p></span></pre>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529"><o:p>&nbsp;</o:p></span></pre>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529">Best regards,<o:p></o:p></span></pre=
>
<pre style=3D"background:white"><span lang=3D"EN-US" style=3D"font-size:9.0=
pt;font-family:Consolas;color:#212529">Shuping<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
</div>
</body>
</html>

--_000_4278D47A901B3041A737953BAA078ADE198FA47Edggeml512mbschi_--


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Date: Fri, 19 Feb 2021 18:03:25 -0500
Cc: TEAS WG <teas@ietf.org>, Martin Vigoureux <martin.vigoureux@nokia.com>, "DEBORAH A BRUNGARD (ATTLABS)" <db3546@att.com>, "Jeffrey (Zhaohui) Zhang" <zzhang@juniper.net>, "Rakesh Gandhi (rgandhi)" <rgandhi@cisco.com>, Alvaro Retana <aretana.ietf@gmail.com>
To: "pals@ietf.org" <pals@ietf.org>, "mpls@ietf.org" <mpls@ietf.org>, detnet@ietf.org, spring@ietf.org
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Subject: [spring] Joint PALS/MPLS/DetNet/SPRING IETF 110 Session - Fri 12 Mar 2021 - Session I
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--Apple-Mail=_E49DA79C-4172-404A-9661-2F2596B15B85
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain;
	charset=us-ascii

Hi All,

There have recently been several drafts that strive to put information =
needed to correctly forward and process packets immediately following =
the MPLS label stack.

For example, draft-zzhang-intarea-generic-delivery-functions and =
draft-gandhi-mpls-ioam-sr are aiming for this spot, where PALS and =
DetNet already sit.

There have also been several previous attempts to put information in the =
same spot.  Sometimes the solutions differ widely. =20

To guarantee the future health of the MPLS protocol, guidelines need to =
be established that are holistic, architectural, future proof.

The PALS and MPLS chairs have discussed this issue and have set up a =
joint meeting in the slot reserved for PALS during IETF 110 (Friday =
Session I).=20
Those that have worked or are working in this area have been invited to =
present at the meeting.=20
The working groups that have solutions specified or proposed in this =
area are encouraged to join the meeting.

The objective of the session is to try and reach consensus for a joint =
and architecturally stable solution that will also have the potential to =
accommodate new technologies that may use this solution.

The agenda for the 2hr session is as follows:
MPLS Architecture considerations (Stewart Bryant) - 25 min
Intarea generic delivery functions (Jeffrey Zhang) - 15 min
MPLS In-situ OAM (Rakesh Gandhi) - 15 min
DetNet perspectives (Lou Berger) - 15 min
Discussion - 45 min
Chairs summary - 5 min

If you have any questions or comments, please feel free to reach out to =
any of the joint session Chairs. (PALS, MPLS, DetNet, SPRING)
Thanks!
Dave Sinicrope
PALS WG Secretary=

--Apple-Mail=_E49DA79C-4172-404A-9661-2F2596B15B85
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html;
	charset=us-ascii

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dus-ascii"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D""><div =
class=3D"">Hi All,</div><div class=3D""><br class=3D""></div><div =
class=3D"">There have recently been several drafts that strive to put =
information needed to correctly forward and process packets immediately =
following the MPLS label&nbsp;stack.</div><div class=3D""><br =
class=3D""></div><div class=3D"">For =
example,&nbsp;draft-zzhang-intarea-generic-delivery-functions =
and&nbsp;draft-gandhi-mpls-ioam-sr are aiming for this spot, where PALS =
and&nbsp;DetNet already sit.</div><div class=3D""><br =
class=3D""></div><div class=3D"">There have also been several previous =
attempts to put information in the same spot. &nbsp;Sometimes the =
solutions differ widely. &nbsp;</div><div class=3D""><br class=3D"">To =
guarantee the future&nbsp;health of the MPLS protocol, guidelines need =
to be established that&nbsp;are holistic, architectural, future =
proof.</div><div class=3D""><br class=3D"">The PALS and MPLS chairs have =
discussed this issue and have set up a&nbsp;joint meeting in the slot =
reserved for PALS during IETF 110 (Friday Session I).&nbsp;</div><div =
class=3D"">Those that have worked or are working in this area have been =
invited to&nbsp;present at the meeting.&nbsp;</div><div class=3D"">The =
working groups that have&nbsp;solutions specified or proposed in this =
area are encouraged to join the meeting.<br class=3D""><br =
class=3D""></div><div class=3D"">The objective of the session is to try =
and reach consensus for a joint and architecturally&nbsp;stable solution =
that will also have the potential to accommodate new&nbsp;technologies =
that may use this solution.<br class=3D""></div><div class=3D""><br =
class=3D""></div><div class=3D"">The agenda for the 2hr session is as =
follows:</div><div class=3D""><ul class=3D""><li class=3D"">MPLS =
Architecture considerations (Stewart Bryant) -&nbsp;25 min</li><li =
class=3D"">Intarea generic delivery functions (Jeffrey Zhang) -&nbsp;15 =
min</li><li class=3D"">MPLS In-situ OAM (Rakesh Gandhi) -&nbsp;15 =
min</li><li class=3D"">DetNet perspectives (Lou Berger) -&nbsp;15 =
min</li><li class=3D"">Discussion -&nbsp;45 min</li><li class=3D"">Chairs =
summary -&nbsp;5 min</li></ul></div><div class=3D""><br =
class=3D""></div><div class=3D"">If you have any questions or comments, =
please feel free to reach out to any of the joint session Chairs. (PALS, =
MPLS, DetNet, SPRING)</div><div class=3D"">Thanks!</div><div =
class=3D"">Dave Sinicrope</div><div class=3D"">PALS WG =
Secretary</div></body></html>=

--Apple-Mail=_E49DA79C-4172-404A-9661-2F2596B15B85--


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Subject: Re: [spring] New Version Notification for draft-chen-pim-srv6-p2mp-path-02.txt
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Hi Everyone,

    Welcome your comments on this new version of the draft.

Best Regards,
Huaimo
________________________________
From: internet-drafts@ietf.org <internet-drafts@ietf.org>
Sent: Sunday, February 21, 2021 10:52 PM
To: Aijun Wang <wangaj3@chinatelecom.cn>; Huaimo Chen <huaimo.chen@futurewe=
i.com>; Huaimo Chen <huaimo.chen@futurewei.com>; Lei Liu <liulei.kddi@gmail=
.com>; Mehmet Toy <mehmet.toy@verizon.com>; Michael McBride <michael.mcbrid=
e@futurewei.com>; Xufeng Liu <xufeng.liu.ietf@gmail.com>; Yanhe Fan <yfan@c=
asa-systems.com>
Subject: New Version Notification for draft-chen-pim-srv6-p2mp-path-02.txt


A new version of I-D, draft-chen-pim-srv6-p2mp-path-02.txt
has been successfully submitted by Huaimo Chen and posted to the
IETF repository.

Name:           draft-chen-pim-srv6-p2mp-path
Revision:       02
Title:          Stateless SRv6 Point-to-Multipoint Path
Document date:  2021-02-21
Group:          Individual Submission
Pages:          17
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Abstract:
   This document describes a solution for a SRv6 Point-to-Multipoint
   (P2MP) Path/Tree to deliver the traffic from the ingress of the path
   to the multiple egresses/leaves of the path in a SR domain.  There is
   no state stored in the core of the network for a SR P2MP path like a
   SR Point-to-Point (P2P) path in this solution.





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

The IETF Secretariat



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Hi Everyone,</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
&nbsp; &nbsp; Welcome your comments on this new version of the draft.</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
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<div style=3D"font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12p=
t; color:rgb(0,0,0)">
Best Regards,</div>
<div style=3D"font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12p=
t; color:rgb(0,0,0)">
Huaimo</div>
<hr tabindex=3D"-1" style=3D"display:inline-block; width:98%">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" co=
lor=3D"#000000" style=3D"font-size:11pt"><b>From:</b> internet-drafts@ietf.=
org &lt;internet-drafts@ietf.org&gt;<br>
<b>Sent:</b> Sunday, February 21, 2021 10:52 PM<br>
<b>To:</b> Aijun Wang &lt;wangaj3@chinatelecom.cn&gt;; Huaimo Chen &lt;huai=
mo.chen@futurewei.com&gt;; Huaimo Chen &lt;huaimo.chen@futurewei.com&gt;; L=
ei Liu &lt;liulei.kddi@gmail.com&gt;; Mehmet Toy &lt;mehmet.toy@verizon.com=
&gt;; Michael McBride &lt;michael.mcbride@futurewei.com&gt;; Xufeng
 Liu &lt;xufeng.liu.ietf@gmail.com&gt;; Yanhe Fan &lt;yfan@casa-systems.com=
&gt;<br>
<b>Subject:</b> New Version Notification for draft-chen-pim-srv6-p2mp-path-=
02.txt</font>
<div>&nbsp;</div>
</div>
<div class=3D"BodyFragment"><font size=3D"2"><span style=3D"font-size:11pt"=
>
<div class=3D"PlainText"><br>
A new version of I-D, draft-chen-pim-srv6-p2mp-path-02.txt<br>
has been successfully submitted by Huaimo Chen and posted to the<br>
IETF repository.<br>
<br>
Name:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; draft-che=
n-pim-srv6-p2mp-path<br>
Revision:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 02<br>
Title:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Stateless SRv6=
 Point-to-Multipoint Path<br>
Document date:&nbsp; 2021-02-21<br>
Group:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Individual Sub=
mission<br>
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<br>
Abstract:<br>
&nbsp;&nbsp; This document describes a solution for a SRv6 Point-to-Multipo=
int<br>
&nbsp;&nbsp; (P2MP) Path/Tree to deliver the traffic from the ingress of th=
e path<br>
&nbsp;&nbsp; to the multiple egresses/leaves of the path in a SR domain.&nb=
sp; There is<br>
&nbsp;&nbsp; no state stored in the core of the network for a SR P2MP path =
like a<br>
&nbsp;&nbsp; SR Point-to-Point (P2P) path in this solution.<br>
<br>
<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
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sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
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sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n<br>
until the htmlized version and diff are available at tools.ietf.org.<br>
<br>
The IETF Secretariat<br>
<br>
<br>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/mnXeoSRJP3EkPKYW1TIObEb9GpE>
Subject: Re: [spring] New Version Notification for draft-hu-spring-segment-routing-proxy-forwarding-13.txt
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Hi Everyone,

    Welcome your comments on this new version of the draft.

Best Regards,
Huaimo
________________________________
From: internet-drafts@ietf.org <internet-drafts@ietf.org>
Sent: Saturday, February 20, 2021 8:18 PM
To: Chris Bowers <cbowers@juniper.net>; Huaimo Chen <huaimo.chen@futurewei.=
com>; Huaimo Chen <huaimo.chen@futurewei.com>; Junda Yao <yaojunda@huawei.c=
om>; Yisong <liuyisong@chinamobile.com>; Yisong Liu <liuyisong@chinamobile.=
com>; Yongqing <zhuyq8@chinatelecom.cn>; Yongqing Zhu <zhuyq8@chinatelecom.=
cn>; Zhibo Hu <huzhibo@huawei.com>
Subject: New Version Notification for draft-hu-spring-segment-routing-proxy=
-forwarding-13.txt


A new version of I-D, draft-hu-spring-segment-routing-proxy-forwarding-13.t=
xt
has been successfully submitted by Huaimo Chen and posted to the
IETF repository.

Name:           draft-hu-spring-segment-routing-proxy-forwarding
Revision:       13
Title:          SR-TE Path Midpoint Protection
Document date:  2021-02-20
Group:          Individual Submission
Pages:          23
URL:            https://nam11.safelinks.protection.outlook.com/?url=3Dhttps=
%3A%2F%2Fwww.ietf.org%2Farchive%2Fid%2Fdraft-hu-spring-segment-routing-prox=
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Abstract:
   Segment Routing Traffic Engineering (SR-TE) supports explicit paths
   using segment lists containing adjacency-SIDs, node-SIDs and binding-
   SIDs.  The current SR FRR such as TI-LFA provides fast re-route
   protection for the failure of a node along a SR-TE path by the direct
   neighbor or say point of local repair (PLR) to the failure.  However,
   once the IGP converges, the SR FRR is no longer sufficient to forward
   traffic of the path around the failure, since the non-neighbors of
   the failure will no longer have a route to the failed node.  This
   document describes a mechanism for fast re-route protection against
   the failure of a SR-TE path after the IGP converges.  It provides
   fast re-route protection for an adjacency segment, a node segment and
   a binding segment of the path.





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

The IETF Secretariat



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<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
Hi Everyone,&nbsp;</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
&nbsp; &nbsp; Welcome your comments on this new version of the draft.</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div>
<div id=3D"appendonsend"></div>
<div style=3D"font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12p=
t; color:rgb(0,0,0)">
Best Regards,</div>
<div style=3D"font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12p=
t; color:rgb(0,0,0)">
Huaimo</div>
<hr tabindex=3D"-1" style=3D"display:inline-block; width:98%">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" co=
lor=3D"#000000" style=3D"font-size:11pt"><b>From:</b> internet-drafts@ietf.=
org &lt;internet-drafts@ietf.org&gt;<br>
<b>Sent:</b> Saturday, February 20, 2021 8:18 PM<br>
<b>To:</b> Chris Bowers &lt;cbowers@juniper.net&gt;; Huaimo Chen &lt;huaimo=
.chen@futurewei.com&gt;; Huaimo Chen &lt;huaimo.chen@futurewei.com&gt;; Jun=
da Yao &lt;yaojunda@huawei.com&gt;; Yisong &lt;liuyisong@chinamobile.com&gt=
;; Yisong Liu &lt;liuyisong@chinamobile.com&gt;; Yongqing &lt;zhuyq8@chinat=
elecom.cn&gt;;
 Yongqing Zhu &lt;zhuyq8@chinatelecom.cn&gt;; Zhibo Hu &lt;huzhibo@huawei.c=
om&gt;<br>
<b>Subject:</b> New Version Notification for draft-hu-spring-segment-routin=
g-proxy-forwarding-13.txt</font>
<div>&nbsp;</div>
</div>
<div class=3D"BodyFragment"><font size=3D"2"><span style=3D"font-size:11pt"=
>
<div class=3D"PlainText"><br>
A new version of I-D, draft-hu-spring-segment-routing-proxy-forwarding-13.t=
xt<br>
has been successfully submitted by Huaimo Chen and posted to the<br>
IETF repository.<br>
<br>
Name:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; draft-hu-=
spring-segment-routing-proxy-forwarding<br>
Revision:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 13<br>
Title:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SR-TE Path Mid=
point Protection<br>
Document date:&nbsp; 2021-02-20<br>
Group:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Individual Sub=
mission<br>
Pages:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 23<br>
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<br>
Abstract:<br>
&nbsp;&nbsp; Segment Routing Traffic Engineering (SR-TE) supports explicit =
paths<br>
&nbsp;&nbsp; using segment lists containing adjacency-SIDs, node-SIDs and b=
inding-<br>
&nbsp;&nbsp; SIDs.&nbsp; The current SR FRR such as TI-LFA provides fast re=
-route<br>
&nbsp;&nbsp; protection for the failure of a node along a SR-TE path by the=
 direct<br>
&nbsp;&nbsp; neighbor or say point of local repair (PLR) to the failure.&nb=
sp; However,<br>
&nbsp;&nbsp; once the IGP converges, the SR FRR is no longer sufficient to =
forward<br>
&nbsp;&nbsp; traffic of the path around the failure, since the non-neighbor=
s of<br>
&nbsp;&nbsp; the failure will no longer have a route to the failed node.&nb=
sp; This<br>
&nbsp;&nbsp; document describes a mechanism for fast re-route protection ag=
ainst<br>
&nbsp;&nbsp; the failure of a SR-TE path after the IGP converges.&nbsp; It =
provides<br>
&nbsp;&nbsp; fast re-route protection for an adjacency segment, a node segm=
ent and<br>
&nbsp;&nbsp; a binding segment of the path.<br>
<br>
<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n<br>
until the htmlized version and diff are available at tools.ietf.org.<br>
<br>
The IETF Secretariat<br>
<br>
<br>
</div>
</span></font></div>
</div>
</body>
</html>

--_000_MN2PR13MB40877445945900D7D350CED8F2819MN2PR13MB4087namp_--


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Subject: [spring] I-D Action: draft-ietf-spring-resource-aware-segments-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 Source Packet Routing in Networking WG of the IETF.

        Title           : Introducing Resource Awareness to SR Segments
        Authors         : Jie Dong
                          Stewart Bryant
                          Takuya Miyasaka
                          Yongqing Zhu
                          Fengwei Qin
                          Zhenqiang Li
                          Francois Clad
	Filename        : draft-ietf-spring-resource-aware-segments-02.txt
	Pages           : 13
	Date            : 2021-02-22

Abstract:
   This document describes the mechanism to associate network resource
   attributes to Segment Routing Identifiers (SIDs).  Such SIDs are
   referred to as resource-aware SIDs in this document.  The resource-
   aware SIDs retain their original forwarding semantics, but with the
   additional semantics to identify the set of network resources
   available for the packet processing action.  The resource-aware SIDs
   can therefore be used to build SR paths or virtual networks with a
   set of reserved network resources.  The proposed mechanism is
   applicable to both segment routing with MPLS data plane (SR-MPLS) and
   segment routing with IPv6 data plane (SRv6).


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segments/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-spring-resource-aware-segments-02
https://datatracker.ietf.org/doc/html/draft-ietf-spring-resource-aware-segments-02

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-spring-resource-aware-segments-02


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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A new Request for Comments is now available in online RFC libraries.

        
        RFC 8986

        Title:      Segment Routing over IPv6 (SRv6) 
                    Network Programming 
        Author:     C. Filsfils, Ed.,
                    P. Camarillo, Ed.,
                    J. Leddy,
                    D. Voyer,
                    S. Matsushima,
                    Z. Li
        Status:     Standards Track
        Stream:     IETF
        Date:       February 2021
        Mailbox:    cf@cisco.com,
                    pcamaril@cisco.com,
                    john@leddy.net,
                    daniel.voyer@bell.ca,
                    satoru.matsushima@g.softbank.co.jp,
                    lizhenbin@huawei.com
        Pages:      40
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ietf-spring-srv6-network-programming-28.txt

        URL:        https://www.rfc-editor.org/info/rfc8986

        DOI:        10.17487/RFC8986

The Segment Routing over IPv6 (SRv6) Network Programming framework
enables a network operator or an application to specify a packet
processing program by encoding a sequence of instructions in the IPv6
packet header.

Each instruction is implemented on one or several nodes in the
network and identified by an SRv6 Segment Identifier in the packet.

This document defines the SRv6 Network Programming concept and
specifies the base set of SRv6 behaviors that enables the creation of
interoperable overlays with underlay optimization.

This document is a product of the Source Packet Routing in Networking Working Group of the IETF.

This is now a Proposed Standard.

STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements.  Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the 
standardization state and status of this protocol.  Distribution of this 
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/ytDfGS-KvWHKZJrJaSe3DOwmFQk>
Subject: [spring] new draft on segment routing approach to TSN
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All,

I would like to call your attention to a new ID https://www.ietf.org/archiv=
e/id/draft-stein-srtsn-00.txt
which describes using a stack-based approach (similar to segment routing) t=
o time sensitive networking.
It furthermore proposes combining segment routing with this approach to TSN
resulting in a unified approach to forwarding and scheduling.

The draft is information at this point, since it discusses the concepts and=
 does not yet pin down the precise formats.

Apologies for simultaneously sending to 3 lists,
but I am not sure which WG is the most appropriate for discussions of this =
topic.

  *   DetNet is most relevant since the whole point is to control end-to-en=
d latency of a time-sensitive flow.
  *   Spring is also directly relevant due to the use of a stack in the hea=
der and the combined approach just mentioned.
  *   PCE is relevant to the case of a central server jointly computing an =
optimal path and local deadline stack.
I'll let the chairs decide where discussions should be held.

Y(J)S


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<p class=3D"MsoNormal">All, <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I would like to call your attention to a new ID <a h=
ref=3D"https://www.ietf.org/archive/id/draft-stein-srtsn-00.txt">
https://www.ietf.org/archive/id/draft-stein-srtsn-00.txt</a> <o:p></o:p></p=
>
<p class=3D"MsoNormal">which describes using a stack-based approach (simila=
r to segment routing) to time sensitive networking.<o:p></o:p></p>
<p class=3D"MsoNormal">It furthermore proposes combining segment routing wi=
th this approach to TSN<o:p></o:p></p>
<p class=3D"MsoNormal">resulting in a unified approach to forwarding and sc=
heduling.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The draft is information at this point, since it dis=
cusses the concepts and does not yet pin down the precise formats.<o:p></o:=
p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Apologies for simultaneously sending to 3 lists, <o:=
p></o:p></p>
<p class=3D"MsoNormal">but I am not sure which WG is the most appropriate f=
or discussions of this topic.<o:p></o:p></p>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso-list:l0 level1 =
lfo1">DetNet is most relevant since the whole point is to control end-to-en=
d latency of a time-sensitive flow.<o:p></o:p></li><li class=3D"MsoListPara=
graph" style=3D"margin-left:0in;mso-list:l0 level1 lfo1">Spring is also dir=
ectly relevant due to the use of a stack in the header and the combined app=
roach just mentioned.<o:p></o:p></li><li class=3D"MsoListParagraph" style=
=3D"margin-left:0in;mso-list:l0 level1 lfo1">PCE is relevant to the case of=
 a central server jointly computing an optimal path and local deadline stac=
k.<o:p></o:p></li></ul>
<p class=3D"MsoNormal">I&#8217;ll let the chairs decide where discussions s=
hould be held.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Y(J)S<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
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From: Shraddha Hegde <shraddha@juniper.net>
To: "spring@ietf.org" <spring@ietf.org>
Thread-Topic: New version of Seamless SR draft
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Date: Tue, 23 Feb 2021 19:00:54 +0000
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Subject: [spring] New version of Seamless SR draft
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Hi All,

Based on inputs received during last WG meeting, we have split the Seamless=
 SR draft
into two documents
1. https://datatracker.ietf.org/doc/draft-hegde-spring-mpls-seamless-sr/

This document focuses on Requirements and Use cases

2.https://datatracker.ietf.org/doc/draft-hegde-spring-seamless-sr-architect=
ure/
This document describes a solution.

Request working Group to review the documents and provide inputs.

Rgds
Shraddha


Juniper Business Use Only

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<p class=3D"MsoNormal">Hi All,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Based on inputs received during last WG meeting, we =
have split the Seamless SR draft<o:p></o:p></p>
<p class=3D"MsoNormal">into two documents<o:p></o:p></p>
<p class=3D"MsoNormal">1. <a href=3D"https://datatracker.ietf.org/doc/draft=
-hegde-spring-mpls-seamless-sr/">
https://datatracker.ietf.org/doc/draft-hegde-spring-mpls-seamless-sr/</a><o=
:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">This document focuses on Requirements and Use cases<=
o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">2.https://datatracker.ietf.org/doc/draft-hegde-sprin=
g-seamless-sr-architecture/<o:p></o:p></p>
<p class=3D"MsoNormal">This document describes a solution.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Request working Group to review the documents and pr=
ovide inputs.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Rgds<o:p></o:p></p>
<p class=3D"MsoNormal">Shraddha<o:p></o:p></p>
<br>
<p class=3D"msipfooter30b3d538" align=3D"Center" style=3D"margin:0"><span s=
tyle=3D"font-size:7.0pt;font-family:Calibri;color:#000000">Juniper Business=
 Use Only</span></p>
</div>
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From: "Dongjie (Jimmy)" <jie.dong@huawei.com>
To: "spring@ietf.org" <spring@ietf.org>
Thread-Topic: [spring] I-D Action: draft-ietf-spring-resource-aware-segments-02.txt
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Dear WG,=20

We've submitted a new version of draft-ietf-spring-resource-aware-segments.=
=20

Based on the comments and suggestions received, further clarifications abou=
t the semantics of resource-aware SID are added. More specifically, the sem=
antics of resource-aware prefix-SID and its associated behavior on the invo=
lved network nodes are elaborated. The related control plane considerations=
 are also described.=20

As always, review comments and suggestions are appreciated.=20

Best regards,
Jie (on behalf of coauthors)

> -----Original Message-----
> From: spring [mailto:spring-bounces@ietf.org] On Behalf Of
> internet-drafts@ietf.org
> Sent: Monday, February 22, 2021 7:53 PM
> To: i-d-announce@ietf.org
> Cc: spring@ietf.org
> Subject: [spring] I-D Action: draft-ietf-spring-resource-aware-segments-0=
2.txt
>=20
>=20
> A New Internet-Draft is available from the on-line Internet-Drafts direct=
ories.
> This draft is a work item of the Source Packet Routing in Networking WG o=
f the
> IETF.
>=20
>         Title           : Introducing Resource Awareness to SR Segments
>         Authors         : Jie Dong
>                           Stewart Bryant
>                           Takuya Miyasaka
>                           Yongqing Zhu
>                           Fengwei Qin
>                           Zhenqiang Li
>                           Francois Clad
> 	Filename        : draft-ietf-spring-resource-aware-segments-02.txt
> 	Pages           : 13
> 	Date            : 2021-02-22
>=20
> Abstract:
>    This document describes the mechanism to associate network resource
>    attributes to Segment Routing Identifiers (SIDs).  Such SIDs are
>    referred to as resource-aware SIDs in this document.  The resource-
>    aware SIDs retain their original forwarding semantics, but with the
>    additional semantics to identify the set of network resources
>    available for the packet processing action.  The resource-aware SIDs
>    can therefore be used to build SR paths or virtual networks with a
>    set of reserved network resources.  The proposed mechanism is
>    applicable to both segment routing with MPLS data plane (SR-MPLS) and
>    segment routing with IPv6 data plane (SRv6).
>=20
>=20
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-spring-resource-aware-segment=
s/
>=20
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-spring-resource-aware-segments-02
> https://datatracker.ietf.org/doc/html/draft-ietf-spring-resource-aware-se=
gmen
> ts-02
>=20
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-spring-resource-aware-segm=
ents-0
> 2
>=20
>=20
> Please note that it may take a couple of minutes from the time of submiss=
ion
> until the htmlized version and diff are available at tools.ietf.org.
>=20
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>=20
>=20
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring


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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/ThdT4LFmCGpQXl35MKp1ggL1OwY>
Subject: Re: [spring] new draft on segment routing approach to TSN
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Very interesting approach.

Thanks,
              Jim Uttaro

From: spring <spring-bounces@ietf.org> On Behalf Of Yaakov Stein
Sent: Tuesday, February 23, 2021 8:14 AM
To: detnet@ietf.org; spring@ietf.org; pce@ietf.org
Subject: [spring] new draft on segment routing approach to TSN

All,

I would like to call your attention to a new ID https://www.ietf.org/archiv=
e/id/draft-stein-srtsn-00.txt<https://urldefense.com/v3/__https:/www.ietf.o=
rg/archive/id/draft-stein-srtsn-00.txt__;!!BhdT!ywXwCcS1Fp_Gs_t6keSpxFAOxac=
e4nmdTFtKP9kkK9fmKk2gtwSZz2d6RFs$>
which describes using a stack-based approach (similar to segment routing) t=
o time sensitive networking.
It furthermore proposes combining segment routing with this approach to TSN
resulting in a unified approach to forwarding and scheduling.

The draft is information at this point, since it discusses the concepts and=
 does not yet pin down the precise formats.

Apologies for simultaneously sending to 3 lists,
but I am not sure which WG is the most appropriate for discussions of this =
topic.

  *   DetNet is most relevant since the whole point is to control end-to-en=
d latency of a time-sensitive flow.
  *   Spring is also directly relevant due to the use of a stack in the hea=
der and the combined approach just mentioned.
  *   PCE is relevant to the case of a central server jointly computing an =
optimal path and local deadline stack.
I'll let the chairs decide where discussions should be held.

Y(J)S


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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><b><span style=3D"font-size:12.0pt;color:#7030A0">Ve=
ry interesting approach.<o:p></o:p></span></b></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:12.0pt;color:#7030A0"><o=
:p>&nbsp;</o:p></span></b></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:12.0pt;color:#7030A0">Th=
anks,<o:p></o:p></span></b></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:12.0pt;color:#7030A0">&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
; Jim Uttaro<o:p></o:p></span></b></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:12.0pt;color:#7030A0"><o=
:p>&nbsp;</o:p></span></b></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> spring &lt;spring-bounces@ietf.org&gt; =
<b>On Behalf Of
</b>Yaakov Stein<br>
<b>Sent:</b> Tuesday, February 23, 2021 8:14 AM<br>
<b>To:</b> detnet@ietf.org; spring@ietf.org; pce@ietf.org<br>
<b>Subject:</b> [spring] new draft on segment routing approach to TSN<o:p><=
/o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">All, <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I would like to call your attention to a new ID <a h=
ref=3D"https://urldefense.com/v3/__https:/www.ietf.org/archive/id/draft-ste=
in-srtsn-00.txt__;!!BhdT!ywXwCcS1Fp_Gs_t6keSpxFAOxace4nmdTFtKP9kkK9fmKk2gtw=
SZz2d6RFs$">
https://www.ietf.org/archive/id/draft-stein-srtsn-00.txt</a> <o:p></o:p></p=
>
<p class=3D"MsoNormal">which describes using a stack-based approach (simila=
r to segment routing) to time sensitive networking.<o:p></o:p></p>
<p class=3D"MsoNormal">It furthermore proposes combining segment routing wi=
th this approach to TSN<o:p></o:p></p>
<p class=3D"MsoNormal">resulting in a unified approach to forwarding and sc=
heduling.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The draft is information at this point, since it dis=
cusses the concepts and does not yet pin down the precise formats.<o:p></o:=
p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Apologies for simultaneously sending to 3 lists, <o:=
p></o:p></p>
<p class=3D"MsoNormal">but I am not sure which WG is the most appropriate f=
or discussions of this topic.<o:p></o:p></p>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso-list:l0 level1 =
lfo3">DetNet is most relevant since the whole point is to control end-to-en=
d latency of a time-sensitive flow.<o:p></o:p></li><li class=3D"MsoListPara=
graph" style=3D"margin-left:0in;mso-list:l0 level1 lfo3">Spring is also dir=
ectly relevant due to the use of a stack in the header and the combined app=
roach just mentioned.<o:p></o:p></li><li class=3D"MsoListParagraph" style=
=3D"margin-left:0in;mso-list:l0 level1 lfo3">PCE is relevant to the case of=
 a central server jointly computing an optimal path and local deadline stac=
k.<o:p></o:p></li></ul>
<p class=3D"MsoNormal">I&#8217;ll let the chairs decide where discussions s=
hould be held.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Y(J)S<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
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From: "Swadesh Agrawal (swaagraw)" <swaagraw@cisco.com>
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From: "Weiqiang Cheng" <chengweiqiang@chinamobile.com>
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Date: Thu, 25 Feb 2021 10:06:43 +0800
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Subject: [spring] Whether the Point-to-multipoint requirement is in scope of SPRING?
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Hi Chairs and group,

 

SRCOMP design team is discussing the Point-to-multipoint requirement for SR
compression as text below. 

But we observed that the SPRING charter did not mention point-to-multipoint
content. 

 

One question for SPRING WG:

Whether the Point-to-multipoint requirement is in scope of SPRING?

 

===

Short Name: Point-to-Multipoint

 

   Description: The compression mechanism SHOULD support point-to-

   multipoint SR paths.

 

   Rationale: Many VPN services require point-to-multipoint SR paths.

 

   Metric: A compliant proposal can encode a multicast address in the

   ultimate segment of the segment list.

 

 

B.R.

Weiqiang Cheng on behalf of SRCOMP DT


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class=3DWordSection1><p class=3DMsoNormal><span lang=3DEN-US>Hi Chairs =
and group,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>SRCOMP design team is discussing the Point-to-multipoint =
requirement for SR compression as text below. <o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>But we observed that the SPRING =
charter did not mention point-to-multipoint content. =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>One question for SPRING WG:<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Whether the Point-to-multipoint =
requirement is in scope of SPRING?<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>=3D=3D=3D<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Short Name: =
Point-to-Multipoint<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;&nbsp; Description: The compression mechanism SHOULD =
support point-to-<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;&nbsp; multipoint SR paths.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>&nbsp;&nbsp; Rationale: Many VPN =
services require point-to-multipoint SR paths.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>&nbsp;&nbsp; Metric: A compliant =
proposal can encode a multicast address in the<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>&nbsp;&nbsp; ultimate segment of =
the segment list.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:10.5pt'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt'>B.R.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US style=3D'font-size:10.5pt'>Weiqiang =
Cheng on behalf of SRCOMP DT<o:p></o:p></span></p></div></body></html>
------=_NextPart_000_0470_01D70B5D.EBE115E0--




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From: Tianran Zhou <zhoutianran@huawei.com>
To: Yaakov Stein <yaakov_s@rad.com>, "detnet@ietf.org" <detnet@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "pce@ietf.org" <pce@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Date: Thu, 25 Feb 2021 08:13:43 +0000
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Hi Yaakov,

This is an interesting topic.
After a quick review, there are several questions as follows:
1. It's clear to me to have a deadline for each packet. So that router can =
schedule the packet based on the urgency. But what's the motivation to spli=
t the end to end deadline to several local ones?
2. How to divide an end to end deadline into several local deadlines? Is th=
ere any example algorithm that could be used by the controller?
3. As far as I know, most devices do not support edf. I am not sure whether=
 your proposal based on edf could really be useful.

Cheers,
Tianran


From: Pce [mailto:pce-bounces@ietf.org] On Behalf Of Yaakov Stein
Sent: Tuesday, February 23, 2021 9:14 PM
To: detnet@ietf.org; spring@ietf.org; pce@ietf.org
Subject: [Pce] new draft on segment routing approach to TSN

All,

I would like to call your attention to a new ID https://www.ietf.org/archiv=
e/id/draft-stein-srtsn-00.txt
which describes using a stack-based approach (similar to segment routing) t=
o time sensitive networking.
It furthermore proposes combining segment routing with this approach to TSN
resulting in a unified approach to forwarding and scheduling.

The draft is information at this point, since it discusses the concepts and=
 does not yet pin down the precise formats.

Apologies for simultaneously sending to 3 lists,
but I am not sure which WG is the most appropriate for discussions of this =
topic.

  *   DetNet is most relevant since the whole point is to control end-to-en=
d latency of a time-sensitive flow.
  *   Spring is also directly relevant due to the use of a stack in the hea=
der and the combined approach just mentioned.
  *   PCE is relevant to the case of a central server jointly computing an =
optimal path and local deadline stack.
I'll let the chairs decide where discussions should be held.

Y(J)S


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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi Yaakov,<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">This is an interesting=
 topic.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">After a quick review, =
there are several questions as follows:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">1. It&#8217;s clear to=
 me to have a deadline for each packet. So that router can schedule the pac=
ket based on the urgency. But what&#8217;s the motivation to split the end =
to end deadline to several local ones?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">2. How to divide an en=
d to end deadline into several local deadlines? Is there any example algori=
thm that could be used by the controller? &nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">3. As far as I know, m=
ost devices do not support edf. I am not sure whether your proposal based o=
n edf could really be useful.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Cheers,<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Tianran<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b>From:</b> Pce [mailto:pce-bounces@ietf.org] <b>On=
 Behalf Of
</b>Yaakov Stein<br>
<b>Sent:</b> Tuesday, February 23, 2021 9:14 PM<br>
<b>To:</b> detnet@ietf.org; spring@ietf.org; pce@ietf.org<br>
<b>Subject:</b> [Pce] new draft on segment routing approach to TSN<o:p></o:=
p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">All, <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I would like to call your attention to a new ID <a h=
ref=3D"https://www.ietf.org/archive/id/draft-stein-srtsn-00.txt">
https://www.ietf.org/archive/id/draft-stein-srtsn-00.txt</a> <o:p></o:p></p=
>
<p class=3D"MsoNormal">which describes using a stack-based approach (simila=
r to segment routing) to time sensitive networking.<o:p></o:p></p>
<p class=3D"MsoNormal">It furthermore proposes combining segment routing wi=
th this approach to TSN<o:p></o:p></p>
<p class=3D"MsoNormal">resulting in a unified approach to forwarding and sc=
heduling.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The draft is information at this point, since it dis=
cusses the concepts and does not yet pin down the precise formats.<o:p></o:=
p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Apologies for simultaneously sending to 3 lists, <o:=
p></o:p></p>
<p class=3D"MsoNormal">but I am not sure which WG is the most appropriate f=
or discussions of this topic.<o:p></o:p></p>
<ul style=3D"margin-top:0cm" type=3D"disc">
<li class=3D"MsoNormal" style=3D"mso-list:l0 level1 lfo3">DetNet is most re=
levant since the whole point is to control end-to-end latency of a time-sen=
sitive flow.<o:p></o:p></li><li class=3D"MsoNormal" style=3D"mso-list:l0 le=
vel1 lfo3">Spring is also directly relevant due to the use of a stack in th=
e header and the combined approach just mentioned.<o:p></o:p></li><li class=
=3D"MsoNormal" style=3D"mso-list:l0 level1 lfo3">PCE is relevant to the cas=
e of a central server jointly computing an optimal path and local deadline =
stack.<o:p></o:p></li></ul>
<p class=3D"MsoNormal">I&#8217;ll let the chairs decide where discussions s=
hould be held.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Y(J)S<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</body>
</html>

--_000_3c69571d0bcb4a6ea1d08bee53c0277dhuaweicom_--


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Hi All,

Two drafts have been submitted.  Please review them and any comments are
welcomed.

 

Compression requirement draft -04 version provided two more requirements: 

https://www.ietf.org/archive/id/draft-srcompdt-spring-compression-requiremen
t-04.txt

 

Compression analysis draft -00 provided a skeleton for the analysis of 4
candidate proposals.

https://www.ietf.org/archive/id/draft-srcompdt-spring-compression-analysis-0
0.txt

 

B.R.

Weiqiang


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vlink=3Dpurple style=3D'text-justify-trim:punctuation'><div =
class=3DWordSection1><p class=3DMsoNormal><span lang=3DEN-US>Hi =
All,<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US>Two =
drafts have been submitted. &nbsp;Please review them and any comments =
are welcomed.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Compression requirement draft -04 version provided two more =
requirements: <o:p></o:p></span></p><p class=3DMsoPlainText><span =
lang=3DEN-US><a =
href=3D"https://www.ietf.org/archive/id/draft-srcompdt-spring-compression=
-requirement-04.txt">https://www.ietf.org/archive/id/draft-srcompdt-sprin=
g-compression-requirement-04.txt</a><o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>Compression analysis draft -00 =
provided a skeleton for the analysis of 4 candidate =
proposals.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><a =
href=3D"https://www.ietf.org/archive/id/draft-srcompdt-spring-compression=
-analysis-00.txt">https://www.ietf.org/archive/id/draft-srcompdt-spring-c=
ompression-analysis-00.txt</a><o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US>B.R.<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
lang=3DEN-US>Weiqiang<o:p></o:p></span></p></div></body></html>
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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Tianran Zhou <zhoutianran@huawei.com>, Yaakov Stein <yaakov_s@rad.com>, "detnet@ietf.org" <detnet@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "pce@ietf.org" <pce@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Subject: Re: [spring] new draft on segment routing approach to TSN
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--_000_CO1PR11MB488181838180DBE6F5DB3B5BD89E9CO1PR11MB4881namp_
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Hi Yaakov and all:

Whereever Yaakov decides to place it I'll be there supporting the work. The=
 draft itself is incredibly well-written and information-rich.
Note that there's also work in RAW that mentions SR operation DetNet relate=
d operations (draft-pthubert-raw-architecture<https://tools.ietf.org/html/d=
raft-pthubert-raw-architecture-05>). RAW has vested interest in intelligent=
 forwarding decision, that would be the trademark vs. DetNet. With this dra=
ft, the forwarding is not based on Qbv schedule but the forwarder has some =
latitude as long as it matches the hop deadline. So RAW may be a good place=
.
And then there's draft-chen-detnet-sr-based-bounded-latency<https://tools.i=
etf.org/html/draft-chen-detnet-sr-based-bounded-latency-01>. Ideally all th=
ese related items would progress in the same room.

Also a few notes on the draft itself:
- maybe use latency instead of delay; it would be nice to maybe define dela=
y as something else, e.g., the delay representing the time the packet spend=
s queued in one hop vs. the latency that is end to end?
- not sure the term green wave is well understood by the public here; the d=
raft gives the impression that the TSN path is faster than the best effort =
and involves no queueing. For the most part that is untrue; the latency is =
bounded but for most flows it is longer than best effort. Best effort can b=
e really fast with passthrough in an empty network. The problem is the long=
 tail and possibly congestion loss. For TSN, there can be very special flow=
s that will traverse the city with all the lights green, but usually there'=
ll be queuing. The difference is that the queueing latency is constant and =
the overall latency is withing bounds.
- Time triggered is not the only TSN operation. I wonder what the draft wou=
ld become with asynchronous shaper in mind. We designed (and as I must anno=
unce, patented as US9602420<https://patents.google.com/patent/US9602420>) a=
 system very similar to the one proposed in the draft, but that is designed=
 to adapt QoS depending on whether the packet is early or late vs. its sche=
dule, and not tagging the schedule in the since the latency is considered e=
nd to end not hop by hop. The use case is slightly different since we apply=
 this without a global controller and a provable guarantees all flows will =
meet the deadline - so not really detnet-, but more like a best effort that=
 all flows meet their deadline in a stochastic environment. If Yaakov is in=
terested, we can contribute on that aspect.

Good luck with the draft,

Pascal


From: detnet <detnet-bounces@ietf.org> On Behalf Of Tianran Zhou
Sent: jeudi 25 f=E9vrier 2021 9:14
To: Yaakov Stein <yaakov_s@rad.com>; detnet@ietf.org; spring@ietf.org; pce@=
ietf.org
Subject: Re: [Detnet] new draft on segment routing approach to TSN

Hi Yaakov,

This is an interesting topic.
After a quick review, there are several questions as follows:
1. It's clear to me to have a deadline for each packet. So that router can =
schedule the packet based on the urgency. But what's the motivation to spli=
t the end to end deadline to several local ones?
2. How to divide an end to end deadline into several local deadlines? Is th=
ere any example algorithm that could be used by the controller?
3. As far as I know, most devices do not support edf. I am not sure whether=
 your proposal based on edf could really be useful.

Cheers,
Tianran


From: Pce [mailto:pce-bounces@ietf.org] On Behalf Of Yaakov Stein
Sent: Tuesday, February 23, 2021 9:14 PM
To: detnet@ietf.org<mailto:detnet@ietf.org>; spring@ietf.org<mailto:spring@=
ietf.org>; pce@ietf.org<mailto:pce@ietf.org>
Subject: [Pce] new draft on segment routing approach to TSN

All,

I would like to call your attention to a new ID https://www.ietf.org/archiv=
e/id/draft-stein-srtsn-00.txt
which describes using a stack-based approach (similar to segment routing) t=
o time sensitive networking.
It furthermore proposes combining segment routing with this approach to TSN
resulting in a unified approach to forwarding and scheduling.

The draft is information at this point, since it discusses the concepts and=
 does not yet pin down the precise formats.

Apologies for simultaneously sending to 3 lists,
but I am not sure which WG is the most appropriate for discussions of this =
topic.

  *   DetNet is most relevant since the whole point is to control end-to-en=
d latency of a time-sensitive flow.
  *   Spring is also directly relevant due to the use of a stack in the hea=
der and the combined approach just mentioned.
  *   PCE is relevant to the case of a central server jointly computing an =
optimal path and local deadline stack.
I'll let the chairs decide where discussions should be held.

Y(J)S


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<body lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72" style=3D"word-wrap:=
break-word">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">Hi Yaakov and all:<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">Whereever Yaakov decides to place it I&#8217;ll be there sup=
porting the work. The draft itself is incredibly well-written and informati=
on-rich.<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">Note that there&#8217;s also work in RAW that mentions SR op=
eration DetNet related operations (</span><a href=3D"https://tools.ietf.org=
/html/draft-pthubert-raw-architecture-05">draft-pthubert-raw-architecture</=
a>).
 RAW has vested interest in intelligent forwarding decision, that would be =
the trademark vs. DetNet. With this draft, the forwarding is not based on Q=
bv schedule but the forwarder has some latitude as long as it matches the h=
op deadline. So RAW may be a good
 place.<o:p></o:p></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">And then there&#8217;s
<a href=3D"https://tools.ietf.org/html/draft-chen-detnet-sr-based-bounded-l=
atency-01">
draft-chen-detnet-sr-based-bounded-latency</a>. Ideally all these related i=
tems would progress in the same room.
<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">Also a few notes on the draft itself:<o:p></o:p></span></fon=
t></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">- maybe use latency instead of delay; it would be nice to ma=
ybe define delay as something else, e.g., the delay representing the time t=
he packet spends queued in one hop vs. the
 latency that is end to end?<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">- not sure the term green wave is well understood by the pub=
lic here; the draft gives the impression that the TSN path is faster than t=
he best effort and involves no queueing.
 For the most part that is untrue; the latency is bounded but for most flow=
s it is longer than best effort. Best effort can be really fast with passth=
rough in an empty network. The problem is the long tail and possibly conges=
tion loss. For TSN, there can be
 very special flows that will traverse the city with all the lights green, =
but usually there&#8217;ll be queuing. The difference is that the queueing =
latency is constant and the overall latency is withing bounds.<o:p></o:p></=
span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">- Time triggered is not the only TSN operation. I wonder wha=
t the draft would become with asynchronous shaper in mind. We designed (and=
 as I must announce, patented as
<a href=3D"https://patents.google.com/patent/US9602420">US9602420</a>) a sy=
stem very similar to the one proposed in the draft, but that is designed to=
 adapt QoS depending on whether the packet is early or late vs. its schedul=
e, and not tagging the schedule in
 the since the latency is considered end to end not hop by hop. The use cas=
e is slightly different since we apply this without a global controller and=
 a provable guarantees all flows will meet the deadline &#8211; so not real=
ly detnet-, but more like a best effort
 that all flows meet their deadline in a stochastic environment. If Yaakov =
is interested, we can contribute on that aspect.<o:p></o:p></span></font></=
p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">Good luck with the draft,<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">Pascal</span></font><o:p></o:p></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><font size=3D"2" face=3D"Calibri"><span style=3D"=
font-size:11.0pt;font-weight:bold">From:</span></font></b> detnet &lt;detne=
t-bounces@ietf.org&gt;
<b><span style=3D"font-weight:bold">On Behalf Of </span></b>Tianran Zhou<br=
>
<b><span style=3D"font-weight:bold">Sent:</span></b> jeudi 25 f=E9vrier 202=
1 9:14<br>
<b><span style=3D"font-weight:bold">To:</span></b> Yaakov Stein &lt;yaakov_=
s@rad.com&gt;; detnet@ietf.org; spring@ietf.org; pce@ietf.org<br>
<b><span style=3D"font-weight:bold">Subject:</span></b> Re: [Detnet] new dr=
aft on segment routing approach to TSN<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#1f497d" face=3D"Calibri">=
<span style=3D"font-size:11.0pt;color:#1F497D">Hi Yaakov,<o:p></o:p></span>=
</font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#1f497d" face=3D"Calibri">=
<span style=3D"font-size:11.0pt;color:#1F497D"><o:p>&nbsp;</o:p></span></fo=
nt></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#1f497d" face=3D"Calibri">=
<span style=3D"font-size:11.0pt;color:#1F497D">This is an interesting topic=
.<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#1f497d" face=3D"Calibri">=
<span style=3D"font-size:11.0pt;color:#1F497D">After a quick review, there =
are several questions as follows:<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#1f497d" face=3D"Calibri">=
<span style=3D"font-size:11.0pt;color:#1F497D">1. It&#8217;s clear to me to=
 have a deadline for each packet. So that router can schedule the packet ba=
sed on the urgency. But what&#8217;s the motivation to
 split the end to end deadline to several local ones?<o:p></o:p></span></fo=
nt></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#1f497d" face=3D"Calibri">=
<span style=3D"font-size:11.0pt;color:#1F497D">2. How to divide an end to e=
nd deadline into several local deadlines? Is there any example algorithm th=
at could be used by the controller? &nbsp;<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#1f497d" face=3D"Calibri">=
<span style=3D"font-size:11.0pt;color:#1F497D">3. As far as I know, most de=
vices do not support edf. I am not sure whether your proposal based on edf =
could really be useful.
<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#1f497d" face=3D"Calibri">=
<span style=3D"font-size:11.0pt;color:#1F497D"><o:p>&nbsp;</o:p></span></fo=
nt></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#1f497d" face=3D"Calibri">=
<span style=3D"font-size:11.0pt;color:#1F497D">Cheers,<o:p></o:p></span></f=
ont></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#1f497d" face=3D"Calibri">=
<span style=3D"font-size:11.0pt;color:#1F497D">Tianran<o:p></o:p></span></f=
ont></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#1f497d" face=3D"Calibri">=
<span style=3D"font-size:11.0pt;color:#1F497D"><o:p>&nbsp;</o:p></span></fo=
nt></p>
<p class=3D"MsoNormal"><font size=3D"2" color=3D"#1f497d" face=3D"Calibri">=
<span style=3D"font-size:11.0pt;color:#1F497D"><o:p>&nbsp;</o:p></span></fo=
nt></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><font size=3D"2" face=3D"Calibri"><span style=3D"=
font-size:11.0pt;font-weight:bold">From:</span></font></b> Pce [<a href=3D"=
mailto:pce-bounces@ietf.org">mailto:pce-bounces@ietf.org</a>]
<b><span style=3D"font-weight:bold">On Behalf Of </span></b>Yaakov Stein<br=
>
<b><span style=3D"font-weight:bold">Sent:</span></b> Tuesday, February 23, =
2021 9:14 PM<br>
<b><span style=3D"font-weight:bold">To:</span></b> <a href=3D"mailto:detnet=
@ietf.org">
detnet@ietf.org</a>; <a href=3D"mailto:spring@ietf.org">spring@ietf.org</a>=
; <a href=3D"mailto:pce@ietf.org">
pce@ietf.org</a><br>
<b><span style=3D"font-weight:bold">Subject:</span></b> [Pce] new draft on =
segment routing approach to TSN<o:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">All,
<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">I would like to call your attention to a new ID
<a href=3D"https://www.ietf.org/archive/id/draft-stein-srtsn-00.txt">https:=
//www.ietf.org/archive/id/draft-stein-srtsn-00.txt</a>
<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">which describes using a stack-based approach (similar to seg=
ment routing) to time sensitive networking.<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">It furthermore proposes combining segment routing with this =
approach to TSN<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">resulting in a unified approach to forwarding and scheduling=
.<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">The draft is information at this point, since it discusses t=
he concepts and does not yet pin down the precise formats.<o:p></o:p></span=
></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">Apologies for simultaneously sending to 3 lists,
<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">but I am not sure which WG is the most appropriate for discu=
ssions of this topic.<o:p></o:p></span></font></p>
<ul style=3D"margin-top:0cm" type=3D"disc">
<li class=3D"MsoNormal" style=3D"mso-list:l0 level1 lfo3"><font size=3D"2" =
face=3D"Calibri"><span style=3D"font-size:11.0pt">DetNet is most relevant s=
ince the whole point is to control end-to-end latency of a time-sensitive f=
low.<o:p></o:p></span></font></li><li class=3D"MsoNormal" style=3D"mso-list=
:l0 level1 lfo3"><font size=3D"2" face=3D"Calibri"><span style=3D"font-size=
:11.0pt">Spring is also directly relevant due to the use of a stack in the =
header and the combined approach just mentioned.<o:p></o:p></span></font></=
li><li class=3D"MsoNormal" style=3D"mso-list:l0 level1 lfo3"><font size=3D"=
2" face=3D"Calibri"><span style=3D"font-size:11.0pt">PCE is relevant to the=
 case of a central server jointly computing an optimal path and local deadl=
ine stack.<o:p></o:p></span></font></li></ul>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">I&#8217;ll let the chairs decide where discussions should be=
 held.<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt">Y(J)S<o:p></o:p></span></font></p>
<p class=3D"MsoNormal"><font size=3D"2" face=3D"Calibri"><span style=3D"fon=
t-size:11.0pt"><o:p>&nbsp;</o:p></span></font></p>
</div>
</div>
</body>
</html>

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From: Yaakov Stein <yaakov_s@rad.com>
To: "Pascal Thubert (pthubert)" <pthubert@cisco.com>, Tianran Zhou <zhoutianran@huawei.com>, "detnet@ietf.org" <detnet@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "pce@ietf.org" <pce@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/18sUxSC8dTzudx4dm9-xFonhVu0>
Subject: Re: [spring] new draft on segment routing approach to TSN
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Pascal,

Wow, there is a lot to respond to.

Thanks for the pointers. I was not aware of this work.
However, I believe this proposal is both different and can be complementary=
 to the ones you mention.

I was going to add a section on how to reproduce Qbv behavior using a stack=
 of deadlines (the argument is a bit tricky, but straightforward).
I don't necessarily think that is a good idea, but it should be there to co=
unter claims that SRTSN only reduces the expectation
but can't provide an absolute upper bound on latency (when based on EDF).

I like to use the term latency, but sometimes use delay to avoid overusing =
it.

I thought that "green wave" would be understood by those who drive cars in =
cities where traffic light coordination is common.

I attempted to describe a data structure for EDF to be used instead of a qu=
eue,
but never implied that "queueing" (meaning packets waiting to be transmitte=
d) doesn't occur.
If that were the case there would not be a need for any data structure at a=
ll.
(Another thing I didn't get into was the trade-offs among the different opt=
ions,
 from worst case complexity and difficulty to implement in hardware PoVs.)

I took a quick look at US 9602420 and will study it further.
However the purpose of this draft is not to mandate any specific scheduling=
 mechanism,
rather to show how such mechanisms can be integrated and hopefully more rea=
dily distributed.
Incidentally I am working on a joint path+deadline optimization algorithm w=
hich only requires partial information.

Proofs of absolute upper bounds on latency are nice, but generally come at =
the price of either

  1.  significantly reduced bandwidth efficiency (like TDM, or equivalently=
 time gating as in Qbv or FlexE),
  2.  unscalable computation
  3.  relatively loose deadlines to being with (like Andrews Zhang)
  4.  assumptions that aren't necessarily obeyed in real life (like a lot o=
f the network calculus proofs).
I would be happy to discuss your variant to see in which class it falls.

Y(J)S


From: Pascal Thubert (pthubert) <pthubert@cisco.com>
Sent: 25/02/2021 19:40
To: Tianran Zhou <zhoutianran@huawei.com>; Yaakov Stein <yaakov_s@rad.com>;=
 detnet@ietf.org; spring@ietf.org; pce@ietf.org
Subject: RE: new draft on segment routing approach to TSN


CAUTION: External sender. Do not click links or open attachments unless you=
 know the content is safe.
Hi Yaakov and all:

Whereever Yaakov decides to place it I'll be there supporting the work. The=
 draft itself is incredibly well-written and information-rich.
Note that there's also work in RAW that mentions SR operation DetNet relate=
d operations (draft-pthubert-raw-architecture<https://eur01.safelinks.prote=
ction.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Fdraft-pthube=
rt-raw-architecture-05&data=3D04%7C01%7Cyaakov_s%40rad.com%7C5a6ae47118cf45=
3d263d08d8d9b4776b%7Cf9047108cc2c4e4897a343fad1b3bf9d%7C1%7C0%7C63749871642=
3474214%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI=
6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3Dml5Lr%2FvJHvhBtJnP6KqQ2gE20rkYMihRA9=
NYOEhye4E%3D&reserved=3D0>). RAW has vested interest in intelligent forward=
ing decision, that would be the trademark vs. DetNet. With this draft, the =
forwarding is not based on Qbv schedule but the forwarder has some latitude=
 as long as it matches the hop deadline. So RAW may be a good place.
And then there's draft-chen-detnet-sr-based-bounded-latency<https://eur01.s=
afelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%=
2Fdraft-chen-detnet-sr-based-bounded-latency-01&data=3D04%7C01%7Cyaakov_s%4=
0rad.com%7C5a6ae47118cf453d263d08d8d9b4776b%7Cf9047108cc2c4e4897a343fad1b3b=
f9d%7C1%7C0%7C637498716423484210%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMD=
AiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3D7DTzliy8OHR=
PIqZ719W7Ul2lPqgpcxcOU4oYb8VmSSM%3D&reserved=3D0>. Ideally all these relate=
d items would progress in the same room.

Also a few notes on the draft itself:
- maybe use latency instead of delay; it would be nice to maybe define dela=
y as something else, e.g., the delay representing the time the packet spend=
s queued in one hop vs. the latency that is end to end?
- not sure the term green wave is well understood by the public here; the d=
raft gives the impression that the TSN path is faster than the best effort =
and involves no queueing. For the most part that is untrue; the latency is =
bounded but for most flows it is longer than best effort. Best effort can b=
e really fast with passthrough in an empty network. The problem is the long=
 tail and possibly congestion loss. For TSN, there can be very special flow=
s that will traverse the city with all the lights green, but usually there'=
ll be queuing. The difference is that the queueing latency is constant and =
the overall latency is withing bounds.
- Time triggered is not the only TSN operation. I wonder what the draft wou=
ld become with asynchronous shaper in mind. We designed (and as I must anno=
unce, patented as US9602420<https://eur01.safelinks.protection.outlook.com/=
?url=3Dhttps%3A%2F%2Fpatents.google.com%2Fpatent%2FUS9602420&data=3D04%7C01=
%7Cyaakov_s%40rad.com%7C5a6ae47118cf453d263d08d8d9b4776b%7Cf9047108cc2c4e48=
97a343fad1b3bf9d%7C1%7C0%7C637498716423494204%7CUnknown%7CTWFpbGZsb3d8eyJWI=
joiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=
=3DaSHLwTc0xl9SbP%2BTLsd4R6EY542%2FOSII1bfC3Jrpueg%3D&reserved=3D0>) a syst=
em very similar to the one proposed in the draft, but that is designed to a=
dapt QoS depending on whether the packet is early or late vs. its schedule,=
 and not tagging the schedule in the since the latency is considered end to=
 end not hop by hop. The use case is slightly different since we apply this=
 without a global controller and a provable guarantees all flows will meet =
the deadline - so not really detnet-, but more like a best effort that all =
flows meet their deadline in a stochastic environment. If Yaakov is interes=
ted, we can contribute on that aspect.

Good luck with the draft,

Pascal


From: detnet <detnet-bounces@ietf.org<mailto:detnet-bounces@ietf.org>> On B=
ehalf Of Tianran Zhou
Sent: jeudi 25 f=E9vrier 2021 9:14
To: Yaakov Stein <yaakov_s@rad.com<mailto:yaakov_s@rad.com>>; detnet@ietf.o=
rg<mailto:detnet@ietf.org>; spring@ietf.org<mailto:spring@ietf.org>; pce@ie=
tf.org<mailto:pce@ietf.org>
Subject: Re: [Detnet] new draft on segment routing approach to TSN

Hi Yaakov,

This is an interesting topic.
After a quick review, there are several questions as follows:
1. It's clear to me to have a deadline for each packet. So that router can =
schedule the packet based on the urgency. But what's the motivation to spli=
t the end to end deadline to several local ones?
2. How to divide an end to end deadline into several local deadlines? Is th=
ere any example algorithm that could be used by the controller?
3. As far as I know, most devices do not support edf. I am not sure whether=
 your proposal based on edf could really be useful.

Cheers,
Tianran


From: Pce [mailto:pce-bounces@ietf.org] On Behalf Of Yaakov Stein
Sent: Tuesday, February 23, 2021 9:14 PM
To: detnet@ietf.org<mailto:detnet@ietf.org>; spring@ietf.org<mailto:spring@=
ietf.org>; pce@ietf.org<mailto:pce@ietf.org>
Subject: [Pce] new draft on segment routing approach to TSN

All,

I would like to call your attention to a new ID https://www.ietf.org/archiv=
e/id/draft-stein-srtsn-00.txt<https://eur01.safelinks.protection.outlook.co=
m/?url=3Dhttps%3A%2F%2Fwww.ietf.org%2Farchive%2Fid%2Fdraft-stein-srtsn-00.t=
xt&data=3D04%7C01%7Cyaakov_s%40rad.com%7C5a6ae47118cf453d263d08d8d9b4776b%7=
Cf9047108cc2c4e4897a343fad1b3bf9d%7C1%7C0%7C637498716423494204%7CUnknown%7C=
TWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0=
%3D%7C1000&sdata=3D8JOBA97tVXOHG3Ao6HOcXU%2FkaqYcMyIjVXQfVRA4twU%3D&reserve=
d=3D0>
which describes using a stack-based approach (similar to segment routing) t=
o time sensitive networking.
It furthermore proposes combining segment routing with this approach to TSN
resulting in a unified approach to forwarding and scheduling.

The draft is information at this point, since it discusses the concepts and=
 does not yet pin down the precise formats.

Apologies for simultaneously sending to 3 lists,
but I am not sure which WG is the most appropriate for discussions of this =
topic.

  *   DetNet is most relevant since the whole point is to control end-to-en=
d latency of a time-sensitive flow.
  *   Spring is also directly relevant due to the use of a stack in the hea=
der and the combined approach just mentioned.
  *   PCE is relevant to the case of a central server jointly computing an =
optimal path and local deadline stack.
I'll let the chairs decide where discussions should be held.

Y(J)S


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</head>
<body lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"WordSection1">
<p class=3D"MsoNormal">Pascal, <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Wow, there is a lot to respond to.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks for the pointers. I was not aware of this wor=
k.<o:p></o:p></p>
<p class=3D"MsoNormal">However, I believe this proposal is both different a=
nd can be complementary to the ones you mention.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I was going to add a section on how to reproduce Qbv=
 behavior using a stack of deadlines (the argument is a bit tricky, but str=
aightforward).<o:p></o:p></p>
<p class=3D"MsoNormal">I don&#8217;t necessarily think that is a good idea,=
 but it should be there to counter claims that SRTSN only reduces the expec=
tation
<o:p></o:p></p>
<p class=3D"MsoNormal">but can&#8217;t provide an absolute upper bound on l=
atency (when based on EDF).<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I like to use the term latency, but sometimes use de=
lay to avoid overusing it.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I thought that &#8220;green wave&#8221; would be und=
erstood by those who drive cars in cities where traffic light coordination =
is common.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I attempted to describe a data structure for EDF to =
be used instead of a queue,<o:p></o:p></p>
<p class=3D"MsoNormal">but never implied that &#8220;queueing&#8221; (meani=
ng packets waiting to be transmitted) doesn&#8217;t occur.<o:p></o:p></p>
<p class=3D"MsoNormal">If that were the case there would not be a need for =
any data structure at all.<o:p></o:p></p>
<p class=3D"MsoNormal">(Another thing I didn&#8217;t get into was the trade=
-offs among the different options,
<o:p></o:p></p>
<p class=3D"MsoNormal">&nbsp;from worst case complexity and difficulty to i=
mplement in hardware PoVs.)<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I took a quick look at US 9602420 and will study it =
further.<o:p></o:p></p>
<p class=3D"MsoNormal">However the purpose of this draft is not to mandate =
any specific scheduling mechanism,<o:p></o:p></p>
<p class=3D"MsoNormal">rather to show how such mechanisms can be integrated=
 and hopefully more readily distributed.<o:p></o:p></p>
<p class=3D"MsoNormal">Incidentally I am working on a joint path+deadline o=
ptimization algorithm which only requires partial information.
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Proofs of absolute upper bounds on latency are nice,=
 but generally come at the price of either<o:p></o:p></p>
<ol style=3D"margin-top:0in" start=3D"1" type=3D"1">
<li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso-list:l0 level1 =
lfo4">significantly reduced bandwidth efficiency (like TDM, or equivalently=
 time gating as in Qbv or FlexE),
<o:p></o:p></li><li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso=
-list:l0 level1 lfo4">unscalable computation
<o:p></o:p></li><li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso=
-list:l0 level1 lfo4">relatively loose deadlines to being with (like Andrew=
s Zhang)<o:p></o:p></li><li class=3D"MsoListParagraph" style=3D"margin-left=
:0in;mso-list:l0 level1 lfo4">assumptions that aren&#8217;t necessarily obe=
yed in real life (like a lot of the network calculus proofs).<o:p></o:p></l=
i></ol>
<p class=3D"MsoNormal">I would be happy to discuss your variant to see in w=
hich class it falls.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Y(J)S<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>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Pascal Thubert (pthubert) &lt;pthubert@=
cisco.com&gt; <br>
<b>Sent:</b> 25/02/2021 19:40<br>
<b>To:</b> Tianran Zhou &lt;zhoutianran@huawei.com&gt;; Yaakov Stein &lt;ya=
akov_s@rad.com&gt;; detnet@ietf.org; spring@ietf.org; pce@ietf.org<br>
<b>Subject:</b> RE: new draft on segment routing approach to TSN<o:p></o:p>=
</p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<table class=3D"MsoNormalTable" border=3D"0" cellspacing=3D"0" cellpadding=
=3D"0" align=3D"left">
<tbody>
<tr>
<td style=3D"background:#BBA555;padding:5.25pt 5.5pt 5.25pt 1.5pt"></td>
<td width=3D"100%" style=3D"width:100.0%;background:#FFE599;padding:5.25pt =
3.75pt 5.25pt 11.25pt;word-wrap:break-word">
<div>
<p style=3D"mso-element:frame;mso-element-frame-hspace:2.25pt;mso-element-w=
rap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizon=
tal:column;mso-height-rule:exactly">
<b><span style=3D"font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;=
color:#212121">CAUTION:</span></b><span style=3D"font-size:9.0pt;font-famil=
y:&quot;Arial&quot;,sans-serif;color:#212121"> External sender. Do not clic=
k links or open attachments unless you know the content
 is safe. </span><o:p></o:p></p>
</div>
</td>
</tr>
</tbody>
</table>
<div>
<p class=3D"MsoNormal">Hi Yaakov and all:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Whereever Yaakov decides to place it I&#8217;ll be t=
here supporting the work. The draft itself is incredibly well-written and i=
nformation-rich.<o:p></o:p></p>
<p class=3D"MsoNormal">Note that there&#8217;s also work in RAW that mentio=
ns SR operation DetNet related operations (<span style=3D"font-size:10.0pt"=
><a href=3D"https://eur01.safelinks.protection.outlook.com/?url=3Dhttps%3A%=
2F%2Ftools.ietf.org%2Fhtml%2Fdraft-pthubert-raw-architecture-05&amp;data=3D=
04%7C01%7Cyaakov_s%40rad.com%7C5a6ae47118cf453d263d08d8d9b4776b%7Cf9047108c=
c2c4e4897a343fad1b3bf9d%7C1%7C0%7C637498716423474214%7CUnknown%7CTWFpbGZsb3=
d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000=
&amp;sdata=3Dml5Lr%2FvJHvhBtJnP6KqQ2gE20rkYMihRA9NYOEhye4E%3D&amp;reserved=
=3D0">draft-pthubert-raw-architecture</a>).
 RAW has vested interest in intelligent forwarding decision, that would be =
the trademark vs. DetNet. With this draft, the forwarding is not based on Q=
bv schedule but the forwarder has some latitude as long as it matches the h=
op deadline. So RAW may be a good
 place.<o:p></o:p></span></p>
<p class=3D"MsoNormal">And then there&#8217;s <a href=3D"https://eur01.safe=
links.protection.outlook.com/?url=3Dhttps%3A%2F%2Ftools.ietf.org%2Fhtml%2Fd=
raft-chen-detnet-sr-based-bounded-latency-01&amp;data=3D04%7C01%7Cyaakov_s%=
40rad.com%7C5a6ae47118cf453d263d08d8d9b4776b%7Cf9047108cc2c4e4897a343fad1b3=
bf9d%7C1%7C0%7C637498716423484210%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwM=
DAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3D7DTzli=
y8OHRPIqZ719W7Ul2lPqgpcxcOU4oYb8VmSSM%3D&amp;reserved=3D0">
draft-chen-detnet-sr-based-bounded-latency</a>. Ideally all these related i=
tems would progress in the same room.
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Also a few notes on the draft itself:<o:p></o:p></p>
<p class=3D"MsoNormal">- maybe use latency instead of delay; it would be ni=
ce to maybe define delay as something else, e.g., the delay representing th=
e time the packet spends queued in one hop vs. the latency that is end to e=
nd?<o:p></o:p></p>
<p class=3D"MsoNormal">- not sure the term green wave is well understood by=
 the public here; the draft gives the impression that the TSN path is faste=
r than the best effort and involves no queueing. For the most part that is =
untrue; the latency is bounded but
 for most flows it is longer than best effort. Best effort can be really fa=
st with passthrough in an empty network. The problem is the long tail and p=
ossibly congestion loss. For TSN, there can be very special flows that will=
 traverse the city with all the
 lights green, but usually there&#8217;ll be queuing. The difference is tha=
t the queueing latency is constant and the overall latency is withing bound=
s.<o:p></o:p></p>
<p class=3D"MsoNormal">- Time triggered is not the only TSN operation. I wo=
nder what the draft would become with asynchronous shaper in mind. We desig=
ned (and as I must announce, patented as
<a href=3D"https://eur01.safelinks.protection.outlook.com/?url=3Dhttps%3A%2=
F%2Fpatents.google.com%2Fpatent%2FUS9602420&amp;data=3D04%7C01%7Cyaakov_s%4=
0rad.com%7C5a6ae47118cf453d263d08d8d9b4776b%7Cf9047108cc2c4e4897a343fad1b3b=
f9d%7C1%7C0%7C637498716423494204%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMD=
AiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3DaSHLwTc=
0xl9SbP%2BTLsd4R6EY542%2FOSII1bfC3Jrpueg%3D&amp;reserved=3D0">
US9602420</a>) a system very similar to the one proposed in the draft, but =
that is designed to adapt QoS depending on whether the packet is early or l=
ate vs. its schedule, and not tagging the schedule in the since the latency=
 is considered end to end not hop
 by hop. The use case is slightly different since we apply this without a g=
lobal controller and a provable guarantees all flows will meet the deadline=
 &#8211; so not really detnet-, but more like a best effort that all flows =
meet their deadline in a stochastic environment.
 If Yaakov is interested, we can contribute on that aspect.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Good luck with the draft,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Pascal<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 style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> detnet &lt;<a href=3D"mailto:detnet-bou=
nces@ietf.org">detnet-bounces@ietf.org</a>&gt;
<b>On Behalf Of </b>Tianran Zhou<br>
<b>Sent:</b> jeudi 25 f=E9vrier 2021 9:14<br>
<b>To:</b> Yaakov Stein &lt;<a href=3D"mailto:yaakov_s@rad.com">yaakov_s@ra=
d.com</a>&gt;;
<a href=3D"mailto:detnet@ietf.org">detnet@ietf.org</a>; <a href=3D"mailto:s=
pring@ietf.org">
spring@ietf.org</a>; <a href=3D"mailto:pce@ietf.org">pce@ietf.org</a><br>
<b>Subject:</b> Re: [Detnet] new draft on segment routing approach to TSN<o=
:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi Yaakov,<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">This is an interesting=
 topic.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">After a quick review, =
there are several questions as follows:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">1. It&#8217;s clear to=
 me to have a deadline for each packet. So that router can schedule the pac=
ket based on the urgency. But what&#8217;s the motivation to split the end =
to end deadline to several local ones?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">2. How to divide an en=
d to end deadline into several local deadlines? Is there any example algori=
thm that could be used by the controller? &nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">3. As far as I know, m=
ost devices do not support edf. I am not sure whether your proposal based o=
n edf could really be useful.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Cheers,<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Tianran<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Pce [<a href=3D"mailto:pce-bounces@ietf=
.org">mailto:pce-bounces@ietf.org</a>]
<b>On Behalf Of </b>Yaakov Stein<br>
<b>Sent:</b> Tuesday, February 23, 2021 9:14 PM<br>
<b>To:</b> <a href=3D"mailto:detnet@ietf.org">detnet@ietf.org</a>; <a href=
=3D"mailto:spring@ietf.org">
spring@ietf.org</a>; <a href=3D"mailto:pce@ietf.org">pce@ietf.org</a><br>
<b>Subject:</b> [Pce] new draft on segment routing approach to TSN<o:p></o:=
p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">All, <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I would like to call your attention to a new ID <a h=
ref=3D"https://eur01.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2F=
www.ietf.org%2Farchive%2Fid%2Fdraft-stein-srtsn-00.txt&amp;data=3D04%7C01%7=
Cyaakov_s%40rad.com%7C5a6ae47118cf453d263d08d8d9b4776b%7Cf9047108cc2c4e4897=
a343fad1b3bf9d%7C1%7C0%7C637498716423494204%7CUnknown%7CTWFpbGZsb3d8eyJWIjo=
iMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdat=
a=3D8JOBA97tVXOHG3Ao6HOcXU%2FkaqYcMyIjVXQfVRA4twU%3D&amp;reserved=3D0">
https://www.ietf.org/archive/id/draft-stein-srtsn-00.txt</a> <o:p></o:p></p=
>
<p class=3D"MsoNormal">which describes using a stack-based approach (simila=
r to segment routing) to time sensitive networking.<o:p></o:p></p>
<p class=3D"MsoNormal">It furthermore proposes combining segment routing wi=
th this approach to TSN<o:p></o:p></p>
<p class=3D"MsoNormal">resulting in a unified approach to forwarding and sc=
heduling.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The draft is information at this point, since it dis=
cusses the concepts and does not yet pin down the precise formats.<o:p></o:=
p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Apologies for simultaneously sending to 3 lists, <o:=
p></o:p></p>
<p class=3D"MsoNormal">but I am not sure which WG is the most appropriate f=
or discussions of this topic.<o:p></o:p></p>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoNormal" style=3D"mso-list:l1 level1 lfo3">DetNet is most re=
levant since the whole point is to control end-to-end latency of a time-sen=
sitive flow.<o:p></o:p></li><li class=3D"MsoNormal" style=3D"mso-list:l1 le=
vel1 lfo3">Spring is also directly relevant due to the use of a stack in th=
e header and the combined approach just mentioned.<o:p></o:p></li><li class=
=3D"MsoNormal" style=3D"mso-list:l1 level1 lfo3">PCE is relevant to the cas=
e of a central server jointly computing an optimal path and local deadline =
stack.<o:p></o:p></li></ul>
<p class=3D"MsoNormal">I&#8217;ll let the chairs decide where discussions s=
hould be held.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Y(J)S<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</div>
</div>
</body>
</html>

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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Yaakov Stein <yaakov_s@rad.com>
CC: Tianran Zhou <zhoutianran@huawei.com>, "detnet@ietf.org" <detnet@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "pce@ietf.org" <pce@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Date: Thu, 25 Feb 2021 21:26:57 +0000
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Subject: Re: [spring] new draft on segment routing approach to TSN
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: "Pascal Thubert (pthubert)" <pthubert=40cisco.com@dmarc.ietf.org>, "Yaakov Stein" <yaakov_s@rad.com>
CC: "detnet@ietf.org" <detnet@ietf.org>, Tianran Zhou <zhoutianran@huawei.com>, "pce@ietf.org" <pce@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Date: Thu, 25 Feb 2021 23:35:34 +0000
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Subject: Re: [spring] new draft on segment routing approach to TSN
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From: Yaakov Stein <yaakov_s@rad.com>
To: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
CC: Tianran Zhou <zhoutianran@huawei.com>, "detnet@ietf.org" <detnet@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "pce@ietf.org" <pce@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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From: Yaakov Stein <yaakov_s@rad.com>
To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>, "Pascal Thubert (pthubert)" <pthubert=40cisco.com@dmarc.ietf.org>
CC: "detnet@ietf.org" <detnet@ietf.org>, Tianran Zhou <zhoutianran@huawei.com>, "pce@ietf.org" <pce@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Subject: Re: [spring] new draft on segment routing approach to TSN
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Yaakov Stein <yaakov_s@rad.com>, "Pascal Thubert (pthubert)" <pthubert=40cisco.com@dmarc.ietf.org>
CC: "detnet@ietf.org" <detnet@ietf.org>, Tianran Zhou <zhoutianran@huawei.com>, "pce@ietf.org" <pce@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
Thread-Index: AdcJ5AjgmuXpLt94R1Stsoh/vUDwUABaAaLAAAtVwoAADcpzUAADGHv+AARIBxAACpyWAAAASPaA
Date: Fri, 26 Feb 2021 04:47:28 +0000
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Subject: Re: [spring] new draft on segment routing approach to TSN
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From: Yaakov Stein <yaakov_s@rad.com>
To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>, "Pascal Thubert (pthubert)" <pthubert=40cisco.com@dmarc.ietf.org>
CC: "detnet@ietf.org" <detnet@ietf.org>, Tianran Zhou <zhoutianran@huawei.com>, "pce@ietf.org" <pce@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Date: Fri, 26 Feb 2021 04:55:54 +0000
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Yaakov Stein <yaakov_s@rad.com>, "Pascal Thubert (pthubert)" <pthubert=40cisco.com@dmarc.ietf.org>
CC: "detnet@ietf.org" <detnet@ietf.org>, Tianran Zhou <zhoutianran@huawei.com>, "pce@ietf.org" <pce@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Subject: Re: [spring] new draft on segment routing approach to TSN
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From: Yaakov Stein <yaakov_s@rad.com>
To: Tianran Zhou <zhoutianran@huawei.com>
CC: "detnet@ietf.org" <detnet@ietf.org>, "spring@ietf.org" <spring@ietf.org>,  "pce@ietf.org" <pce@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Date: Fri, 26 Feb 2021 05:09:03 +0000
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Subject: Re: [spring] new draft on segment routing approach to TSN
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From: Yaakov Stein <yaakov_s@rad.com>
To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>, "Pascal Thubert (pthubert)" <pthubert=40cisco.com@dmarc.ietf.org>
CC: "detnet@ietf.org" <detnet@ietf.org>, Tianran Zhou <zhoutianran@huawei.com>, "pce@ietf.org" <pce@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Subject: Re: [spring] new draft on segment routing approach to TSN
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From: Yaakov Stein <yaakov_s@rad.com>
To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>, "Pascal Thubert (pthubert)" <pthubert=40cisco.com@dmarc.ietf.org>
CC: "detnet@ietf.org" <detnet@ietf.org>, Tianran Zhou <zhoutianran@huawei.com>, "pce@ietf.org" <pce@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Subject: Re: [spring] new draft on segment routing approach to TSN
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Yaakov Stein <yaakov_s@rad.com>, "Pascal Thubert (pthubert)" <pthubert=40cisco.com@dmarc.ietf.org>
CC: "detnet@ietf.org" <detnet@ietf.org>, Tianran Zhou <zhoutianran@huawei.com>, "pce@ietf.org" <pce@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Subject: Re: [spring] new draft on segment routing approach to TSN
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From: Yaakov Stein <yaakov_s@rad.com>
To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>, "Pascal Thubert (pthubert)" <pthubert=40cisco.com@dmarc.ietf.org>
CC: "detnet@ietf.org" <detnet@ietf.org>, Tianran Zhou <zhoutianran@huawei.com>, "pce@ietf.org" <pce@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Yaakov Stein <yaakov_s@rad.com>, "raw-chairs@ietf.org" <raw-chairs@ietf.org>
CC: "detnet@ietf.org" <detnet@ietf.org>, "spring@ietf.org" <spring@ietf.org>,  "pce@ietf.org" <pce@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Subject: Re: [spring] new draft on segment routing approach to TSN
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Yaakov Stein <yaakov_s@rad.com>
CC: "Pascal Thubert (pthubert)" <pthubert=40cisco.com@dmarc.ietf.org>, "detnet@ietf.org" <detnet@ietf.org>, Tianran Zhou <zhoutianran@huawei.com>, "pce@ietf.org" <pce@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Subject: Re: [spring] new draft on segment routing approach to TSN
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From: Yaakov Stein <yaakov_s@rad.com>
To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
CC: "Pascal Thubert (pthubert)" <pthubert=40cisco.com@dmarc.ietf.org>, "detnet@ietf.org" <detnet@ietf.org>, Tianran Zhou <zhoutianran@huawei.com>, "pce@ietf.org" <pce@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Date: Fri, 26 Feb 2021 08:05:22 +0000
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From: Tianran Zhou <zhoutianran@huawei.com>
To: Yaakov Stein <yaakov_s@rad.com>
CC: "detnet@ietf.org" <detnet@ietf.org>, "spring@ietf.org" <spring@ietf.org>,  "pce@ietf.org" <pce@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Subject: Re: [spring] new draft on segment routing approach to TSN
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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Yaakov Stein <yaakov_s@rad.com>
CC: "detnet@ietf.org" <detnet@ietf.org>, "spring@ietf.org" <spring@ietf.org>,  "pce@ietf.org" <pce@ietf.org>, "raw@ietf.org" <raw@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Subject: Re: [spring] new draft on segment routing approach to TSN
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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: "Jakob Heitz (jheitz)" <jheitz=40cisco.com@dmarc.ietf.org>
CC: Yaakov Stein <yaakov_s@rad.com>, "detnet@ietf.org" <detnet@ietf.org>, Tianran Zhou <zhoutianran@huawei.com>, "pce@ietf.org" <pce@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Subject: Re: [spring] new draft on segment routing approach to TSN
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From: Yaakov Stein <yaakov_s@rad.com>
To: Tianran Zhou <zhoutianran@huawei.com>
CC: "detnet@ietf.org" <detnet@ietf.org>, "spring@ietf.org" <spring@ietf.org>,  "pce@ietf.org" <pce@ietf.org>
Thread-Topic: new draft on segment routing approach to TSN
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Date: Fri, 26 Feb 2021 10:13:30 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/X6OwLdkIAQ7lJSxFDa62Dgzy99A>
Subject: Re: [spring] new draft on segment routing approach to TSN
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Tianran,

All valid points.

I do not doubt that there are RT cases with drop-dead deadlines,
but even they must live with rare losses (which is what a failure to meet d=
eadline becomes).

As I said earlier the stack mechanism can replicate time gating behavior.
But time gating loses bandwidth efficiency and is really hard to scale up.

EDF in general will beat calendaring (i.e., has a lower expected latency),
but has a longer tail (which will be the aforementioned losses).
Given some statistics of packet transmission times one can calculate the pe=
rcentage of packets
in that tail for a simple-to-setup approach with EDF.
It might be the case that some loss is better than not being able to calcul=
ate the schedule
and having to devote a lambda to each flow.

Y(J)S


From: Tianran Zhou <zhoutianran@huawei.com>
Sent: 26/02/2021 10:20
To: Yaakov Stein <yaakov_s@rad.com>
Cc: detnet@ietf.org; spring@ietf.org; pce@ietf.org
Subject: RE: new draft on segment routing approach to TSN


CAUTION: External sender. Do not click links or open attachments unless you=
 know the content is safe.
Hi Yaakov,

Thanks for your clarification.
Again I think this is an interesting work.
Please see inline.

Cheers,
Tianran

From: Yaakov Stein [mailto:yaakov_s@rad.com]
Sent: Friday, February 26, 2021 1:09 PM
To: Tianran Zhou <zhoutianran@huawei.com<mailto:zhoutianran@huawei.com>>
Cc: detnet@ietf.org<mailto:detnet@ietf.org>; spring@ietf.org<mailto:spring@=
ietf.org>; pce@ietf.org<mailto:pce@ietf.org>
Subject: RE: new draft on segment routing approach to TSN

Tianran,

For some reason I didn't see your email and thus never responded to it. My =
apologies.


1.       I believe that I address this question at the beginning of my draf=
t.

Using a single deadline per packet at is suboptimal at any particular switc=
h.

For example, say two packets arrive at a switch, one with only 20 microseco=
nds left on its deadline

and one with 50. The switch would naturally schedule the 10 microsecond one=
 first.

But what the switch doesn't know is that it is the last hop for the 10 micr=
osecond one

and there are only 2 microseconds from it to destination,

while the 50 microsecond packet still has 45 microseconds of physical time =
ahead of it!



ZTR> Yes, you provided a valid use case in some sense.

But I have to say, IMO, the real-time system cares more about whether the d=
eadline could meet.

So in practice, the task set is fixed, and all the latencies are calculated=
 and guaranteed to meet the dead line. I do not care whether the packet cou=
ld arrive earlier or not.

So, an deterministic and easy schedule make the evaluation/plan easier. And=
 It's better to see all the tasks could be accommodated in the plan.



ZTR> I can provide an use case, say a task could meet the 20 end to end dea=
dline within 2 hops, one hop for 14, and the other for 6.

If we give split hop by hop deadlines, 10 for each.  That means the first h=
op with 14 delay cannot meet the 10 local deadline.

So for the first schedule, this task could be accommodated. But for the sec=
ond one, this task cannot be accommodated.



  1.  I gave a specific algorithm in the draft and pointed to Andrews and Z=
hang who give another one.

ZTR> Thanks for the pointer, I would like to look into them.


  1.  I don't think a service needs to support EDF, but perhaps a switch do=
es.

I haven't seen EDF support since the ATM days, but am proposing that perhap=
s the time has come to re-evaluate it.

However, I am not advocating for EDF in this draft, just for the stack.

I mention a variant of EDF which I believe is better, and am working on ano=
ther variant which is even better.

They can all be built into hardware, although admitted are more complex tha=
n a simple queue.

But they may be simpler than a set of queues with time schedules like Qbv

and are much much simpler than monstrosities like MEF 10.3 token bucket wit=
h cross-color/cross-CoS sharing and coupling.



ZTR> Not sure if my thoughts are common sense or not. :)

IMO, the merit of Qbv, or TAS, is to isolate hard real-time, soft real-time=
, best effort tasks. So that they can accommodate in one switch.

This is one critical requirement for IT/OT integration.

EDF does not conflict with TAS. I worked on some hierarchical scheduling me=
chanisms many years ago, EDF is used in the time slot for hard real-time ta=
sks.


Y(J)S



From: detnet <detnet-bounces@ietf.org<mailto:detnet-bounces@ietf.org>> On B=
ehalf Of Tianran Zhou
Sent: jeudi 25 f=E9vrier 2021 9:14
To: Yaakov Stein <yaakov_s@rad.com<mailto:yaakov_s@rad.com>>; detnet@ietf.o=
rg<mailto:detnet@ietf.org>; spring@ietf.org<mailto:spring@ietf.org>; pce@ie=
tf.org<mailto:pce@ietf.org>
Subject: Re: [Detnet] new draft on segment routing approach to TSN

Hi Yaakov,

This is an interesting topic.
After a quick review, there are several questions as follows:
1. It's clear to me to have a deadline for each packet. So that router can =
schedule the packet based on the urgency. But what's the motivation to spli=
t the end to end deadline to several local ones?
2. How to divide an end to end deadline into several local deadlines? Is th=
ere any example algorithm that could be used by the controller?
3. As far as I know, most devices do not support edf. I am not sure whether=
 your proposal based on edf could really be useful.

Cheers,
Tianran


From: Pce [mailto:pce-bounces@ietf.org] On Behalf Of Yaakov Stein
Sent: Tuesday, February 23, 2021 9:14 PM
To: detnet@ietf.org<mailto:detnet@ietf.org>; spring@ietf.org<mailto:spring@=
ietf.org>; pce@ietf.org<mailto:pce@ietf.org>
Subject: [Pce] new draft on segment routing approach to TSN

All,

I would like to call your attention to a new ID https://www.ietf.org/archiv=
e/id/draft-stein-srtsn-00.txt<https://eur01.safelinks.protection.outlook.co=
m/?url=3Dhttps%3A%2F%2Fwww.ietf.org%2Farchive%2Fid%2Fdraft-stein-srtsn-00.t=
xt&data=3D04%7C01%7Cyaakov_s%40rad.com%7Cad8cd800d9504f145a9a08d8da2f6322%7=
Cf9047108cc2c4e4897a343fad1b3bf9d%7C1%7C0%7C637499244365725326%7CUnknown%7C=
TWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0=
%3D%7C1000&sdata=3DxBIZ5ReTMzcAfx1TafhEl5wBlIzK6M8KskAQG%2BdtSZY%3D&reserve=
d=3D0>
which describes using a stack-based approach (similar to segment routing) t=
o time sensitive networking.
It furthermore proposes combining segment routing with this approach to TSN
resulting in a unified approach to forwarding and scheduling.

The draft is information at this point, since it discusses the concepts and=
 does not yet pin down the precise formats.

Apologies for simultaneously sending to 3 lists,
but I am not sure which WG is the most appropriate for discussions of this =
topic.

  *   DetNet is most relevant since the whole point is to control end-to-en=
d latency of a time-sensitive flow.
  *   Spring is also directly relevant due to the use of a stack in the hea=
der and the combined approach just mentioned.
  *   PCE is relevant to the case of a central server jointly computing an =
optimal path and local deadline stack.
I'll let the chairs decide where discussions should be held.

Y(J)S


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<body lang=3D"EN-US" link=3D"#0563C1" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal">Tianran, <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">All valid points.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I do not doubt that there are RT cases with drop-dea=
d deadlines,<o:p></o:p></p>
<p class=3D"MsoNormal">but even they must live with rare losses (which is w=
hat a failure to meet deadline becomes).<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">As I said earlier the stack mechanism can replicate =
time gating behavior.<o:p></o:p></p>
<p class=3D"MsoNormal">But time gating loses bandwidth efficiency and is re=
ally hard to scale up.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">EDF in general will beat calendaring (i.e., has a lo=
wer expected latency),
<o:p></o:p></p>
<p class=3D"MsoNormal">but has a longer tail (which will be the aforementio=
ned losses).
<o:p></o:p></p>
<p class=3D"MsoNormal">Given some statistics of packet transmission times o=
ne can calculate the percentage of packets<o:p></o:p></p>
<p class=3D"MsoNormal">in that tail for a simple-to-setup approach with EDF=
. <o:p></o:p></p>
<p class=3D"MsoNormal">It might be the case that some loss is better than n=
ot being able to calculate the schedule<o:p></o:p></p>
<p class=3D"MsoNormal">and having to devote a lambda to each flow.<o:p></o:=
p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Y(J)S<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>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Tianran Zhou &lt;zhoutianran@huawei.com=
&gt; <br>
<b>Sent:</b> 26/02/2021 10:20<br>
<b>To:</b> Yaakov Stein &lt;yaakov_s@rad.com&gt;<br>
<b>Cc:</b> detnet@ietf.org; spring@ietf.org; pce@ietf.org<br>
<b>Subject:</b> RE: new draft on segment routing approach to TSN<o:p></o:p>=
</p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<table class=3D"MsoNormalTable" border=3D"0" cellspacing=3D"0" cellpadding=
=3D"0" align=3D"left">
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<tr>
<td style=3D"background:#BBA555;padding:5.25pt 5.5pt 5.25pt 1.5pt"></td>
<td width=3D"100%" style=3D"width:100.0%;background:#FFE599;padding:5.25pt =
3.75pt 5.25pt 11.25pt;word-wrap:break-word">
<div>
<p style=3D"mso-element:frame;mso-element-frame-hspace:2.25pt;mso-element-w=
rap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizon=
tal:column;mso-height-rule:exactly">
<b><span style=3D"font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;=
color:#212121">CAUTION:</span></b><span style=3D"font-size:9.0pt;font-famil=
y:&quot;Arial&quot;,sans-serif;color:#212121"> External sender. Do not clic=
k links or open attachments unless you know the content
 is safe. </span><o:p></o:p></p>
</div>
</td>
</tr>
</tbody>
</table>
<div>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi Yaakov,<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Thanks for your clarif=
ication.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Again I think this is =
an interesting work.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Please see inline.<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Cheers,<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Tianran<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Yaakov Stein [<a href=3D"mailto:yaakov_=
s@rad.com">mailto:yaakov_s@rad.com</a>]
<br>
<b>Sent:</b> Friday, February 26, 2021 1:09 PM<br>
<b>To:</b> Tianran Zhou &lt;<a href=3D"mailto:zhoutianran@huawei.com">zhout=
ianran@huawei.com</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:detnet@ietf.org">detnet@ietf.org</a>; <a href=
=3D"mailto:spring@ietf.org">
spring@ietf.org</a>; <a href=3D"mailto:pce@ietf.org">pce@ietf.org</a><br>
<b>Subject:</b> RE: new draft on segment routing approach to TSN<o:p></o:p>=
</p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Tianran, <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">For some reason I didn&#8217;t see your email and th=
us never responded to it. My apologies.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:23.05pt;margin-bottom:.0001pt;text-inden=
t:-.25in;mso-list:l2 level1 lfo2">
<![if !supportLists]><span style=3D"mso-list:Ignore">1.<span style=3D"font:=
7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]><span dir=3D"LTR"></span>I believe that I address t=
his question at the beginning of my draft.<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:23.05pt;margin-bottom:.0001pt">
Using a single deadline per packet at is suboptimal at any particular switc=
h.<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:23.05pt;margin-bottom:.0001pt">
For example, say two packets arrive at a switch, one with only 20 microseco=
nds left on its deadline<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:23.05pt;margin-bottom:.0001pt">
and one with 50. The switch would naturally schedule the 10 microsecond one=
 first.<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:23.05pt;margin-bottom:.0001pt">
But what the switch doesn&#8217;t know is that it is the last hop for the 1=
0 microsecond one
<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:23.05pt;margin-bottom:.0001pt">
and there are only 2 microseconds from it to destination,<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:23.05pt;margin-bottom:.0001pt">
while the 50 microsecond packet still has 45 microseconds of physical time =
ahead of it!<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:0in;margin-bottom:.0001pt">
<span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:0in;margin-bottom:.0001pt">
<span style=3D"color:#1F497D">ZTR&gt; Yes, you provided a valid use case in=
 some sense.
<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:0in;margin-bottom:.0001pt">
<span style=3D"color:#1F497D">But I have to say, IMO, the real-time system =
cares more about whether the deadline could meet.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:0in;margin-bottom:.0001pt">
<span style=3D"color:#1F497D">So in practice, the task set is fixed, and al=
l the latencies are calculated and guaranteed to meet the dead line. I do n=
ot care whether the packet could arrive earlier or not.<o:p></o:p></span></=
p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:0in;margin-bottom:.0001pt">
<span style=3D"color:#1F497D">So, an deterministic and easy schedule make t=
he evaluation/plan easier. And It&#8217;s better to see all the tasks could=
 be accommodated in the plan.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:0in;margin-bottom:.0001pt">
<span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:0in;margin-bottom:.0001pt">
<span style=3D"color:#1F497D">ZTR&gt; I can provide an use case, say a task=
 could meet the 20 end to end deadline within 2 hops, one hop for 14, and t=
he other for 6.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:0in;margin-bottom:.0001pt">
<span style=3D"color:#1F497D">If we give split hop by hop deadlines, 10 for=
 each.&nbsp; That means the first hop with 14 delay cannot meet the 10 loca=
l deadline.
<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:0in;margin-bottom:.0001pt">
<span style=3D"color:#1F497D">So for the first schedule, this task could be=
 accommodated. But for the second one, this task cannot be accommodated.<o:=
p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:0in;margin-bottom:.0001pt">
<span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<ol style=3D"margin-top:0in" start=3D"2" type=3D"1">
<li class=3D"MsoNormal" style=3D"mso-margin-top-alt:5.0pt;margin-right:.5in=
;margin-bottom:5.0pt;margin-left:-12.75pt;mso-list:l2 level1 lfo2">
I gave a specific algorithm in the draft and pointed to Andrews and Zhang w=
ho give another one.<o:p></o:p></li></ol>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:5.0pt;margin-right:.5in;=
margin-bottom:5.0pt;margin-left:0in">
<span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:5.0pt;margin-right:.5in;=
margin-bottom:5.0pt;margin-left:0in">
<span style=3D"color:#1F497D">ZTR&gt; Thanks for the pointer, I would like =
to look into them.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:5.0pt;margin-right:.5in;=
margin-bottom:5.0pt;margin-left:0in">
<span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<ol style=3D"margin-top:0in" start=3D"3" type=3D"1">
<li class=3D"MsoNormal" style=3D"mso-margin-top-alt:5.0pt;margin-right:.5in=
;margin-bottom:5.0pt;margin-left:-12.75pt;mso-list:l2 level1 lfo2">
I don&#8217;t think a service needs to support EDF, but perhaps a switch do=
es.<o:p></o:p></li></ol>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:23.05pt;margin-bottom:.0001pt">
I haven&#8217;t seen EDF support since the ATM days, but am proposing that =
perhaps the time has come to re-evaluate it.<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:23.05pt;margin-bottom:.0001pt">
However, I am not advocating for EDF in this draft, just for the stack.<o:p=
></o:p></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:23.05pt;margin-bottom:.0001pt">
I mention a variant of EDF which I believe is better, and am working on ano=
ther variant which is even better.<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:23.05pt;margin-bottom:.0001pt">
They can all be built into hardware, although admitted are more complex tha=
n a simple queue.<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:23.05pt;margin-bottom:.0001pt">
But they may be simpler than a set of queues with time schedules like Qbv<o=
:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:23.05pt;margin-bottom:.0001pt">
and are much much simpler than monstrosities like MEF 10.3 token bucket wit=
h cross-color/cross-CoS sharing and coupling.<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:0in;margin-bottom:.0001pt">
<span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:0in;margin-bottom:.0001pt">
<span style=3D"color:#1F497D">ZTR&gt; Not sure if my thoughts are common se=
nse or not.
</span><span style=3D"font-family:Wingdings;color:#1F497D">J</span><span st=
yle=3D"color:#1F497D"><o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:0in;margin-bottom:.0001pt">
<span style=3D"color:#1F497D">IMO, the merit of Qbv, or TAS, is to isolate =
hard real-time, soft real-time, best effort tasks. So that they can accommo=
date in one switch.
<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:0in;margin-bottom:.0001pt">
<span style=3D"color:#1F497D">This is one critical requirement for IT/OT in=
tegration.
<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:0in;margin-bottom:.0001pt">
<span style=3D"color:#1F497D">EDF does not conflict with TAS. I worked on s=
ome hierarchical scheduling mechanisms many years ago, EDF is used in the t=
ime slot for hard real-time tasks. &nbsp;<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:0in;margin-right:=
.5in;margin-bottom:0in;margin-left:0in;margin-bottom:.0001pt">
<span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:5.0pt;margin-right:1.0in=
;margin-bottom:5.0pt;margin-left:0in">
Y(J)S<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"mso-margin-top-alt:5.0pt;margin-righ=
t:.5in;margin-bottom:5.0pt;margin-left:41.25pt">
<o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">&nbsp;<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 #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> detnet &lt;<a href=3D"mailto:detnet-bou=
nces@ietf.org">detnet-bounces@ietf.org</a>&gt;
<b>On Behalf Of </b>Tianran Zhou<br>
<b>Sent:</b> jeudi 25 f=E9vrier 2021 9:14<br>
<b>To:</b> Yaakov Stein &lt;<a href=3D"mailto:yaakov_s@rad.com">yaakov_s@ra=
d.com</a>&gt;;
<a href=3D"mailto:detnet@ietf.org">detnet@ietf.org</a>; <a href=3D"mailto:s=
pring@ietf.org">
spring@ietf.org</a>; <a href=3D"mailto:pce@ietf.org">pce@ietf.org</a><br>
<b>Subject:</b> Re: [Detnet] new draft on segment routing approach to TSN<o=
:p></o:p></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi Yaakov,</span><o:p>=
</o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">&nbsp;</span><o:p></o:=
p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">This is an interesting=
 topic.</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">After a quick review, =
there are several questions as follows:</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">1. It&#8217;s clear to=
 me to have a deadline for each packet. So that router can schedule the pac=
ket based on the urgency. But what&#8217;s the motivation to split the end =
to end deadline to several local ones?</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">2. How to divide an en=
d to end deadline into several local deadlines? Is there any example algori=
thm that could be used by the controller? &nbsp;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">3. As far as I know, m=
ost devices do not support edf. I am not sure whether your proposal based o=
n edf could really be useful.
</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">&nbsp;</span><o:p></o:=
p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Cheers,</span><o:p></o=
:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Tianran</span><o:p></o=
:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">&nbsp;</span><o:p></o:=
p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">&nbsp;</span><o:p></o:=
p></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Pce [<a href=3D"mailto:pce-bounces@ietf=
.org">mailto:pce-bounces@ietf.org</a>]
<b>On Behalf Of </b>Yaakov Stein<br>
<b>Sent:</b> Tuesday, February 23, 2021 9:14 PM<br>
<b>To:</b> <a href=3D"mailto:detnet@ietf.org">detnet@ietf.org</a>; <a href=
=3D"mailto:spring@ietf.org">
spring@ietf.org</a>; <a href=3D"mailto:pce@ietf.org">pce@ietf.org</a><br>
<b>Subject:</b> [Pce] new draft on segment routing approach to TSN<o:p></o:=
p></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal">All, <o:p></o:p></p>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal">I would like to call your attention to a new ID <a h=
ref=3D"https://eur01.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2F=
www.ietf.org%2Farchive%2Fid%2Fdraft-stein-srtsn-00.txt&amp;data=3D04%7C01%7=
Cyaakov_s%40rad.com%7Cad8cd800d9504f145a9a08d8da2f6322%7Cf9047108cc2c4e4897=
a343fad1b3bf9d%7C1%7C0%7C637499244365725326%7CUnknown%7CTWFpbGZsb3d8eyJWIjo=
iMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdat=
a=3DxBIZ5ReTMzcAfx1TafhEl5wBlIzK6M8KskAQG%2BdtSZY%3D&amp;reserved=3D0">
https://www.ietf.org/archive/id/draft-stein-srtsn-00.txt</a> <o:p></o:p></p=
>
<p class=3D"MsoNormal">which describes using a stack-based approach (simila=
r to segment routing) to time sensitive networking.<o:p></o:p></p>
<p class=3D"MsoNormal">It furthermore proposes combining segment routing wi=
th this approach to TSN<o:p></o:p></p>
<p class=3D"MsoNormal">resulting in a unified approach to forwarding and sc=
heduling.<o:p></o:p></p>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal">The draft is information at this point, since it dis=
cusses the concepts and does not yet pin down the precise formats.<o:p></o:=
p></p>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal">Apologies for simultaneously sending to 3 lists, <o:=
p></o:p></p>
<p class=3D"MsoNormal">but I am not sure which WG is the most appropriate f=
or discussions of this topic.<o:p></o:p></p>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoNormal" style=3D"mso-list:l0 level1 lfo5">DetNet is most re=
levant since the whole point is to control end-to-end latency of a time-sen=
sitive flow.<o:p></o:p></li><li class=3D"MsoNormal" style=3D"mso-list:l0 le=
vel1 lfo5">Spring is also directly relevant due to the use of a stack in th=
e header and the combined approach just mentioned.<o:p></o:p></li><li class=
=3D"MsoNormal" style=3D"mso-list:l0 level1 lfo5">PCE is relevant to the cas=
e of a central server jointly computing an optimal path and local deadline =
stack.<o:p></o:p></li></ul>
<p class=3D"MsoNormal">I&#8217;ll let the chairs decide where discussions s=
hould be held.<o:p></o:p></p>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal">Y(J)S<o:p></o:p></p>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
</div>
</div>
</div>
</body>
</html>

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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Yaakov Stein <yaakov_s@rad.com>
CC: Tianran Zhou <zhoutianran@huawei.com>, "spring@ietf.org" <spring@ietf.org>, "detnet@ietf.org" <detnet@ietf.org>, "pce@ietf.org" <pce@ietf.org>
Thread-Topic: [Detnet] new draft on segment routing approach to TSN
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Subject: Re: [spring] [Detnet] new draft on segment routing approach to TSN
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--_000_4803C949F9854CF4BFDC250993F1ABE3ciscocom_--


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From: Tianran Zhou <zhoutianran@huawei.com>
To: "Pascal Thubert (pthubert)" <pthubert@cisco.com>, Yaakov Stein <yaakov_s@rad.com>
CC: spring <spring@ietf.org>, detnet <detnet@ietf.org>, pce <pce@ietf.org>
Thread-Topic: [Detnet] new draft on segment routing approach to TSN
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Date: Fri, 26 Feb 2021 11:55:24 +0000
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Subject: Re: [spring] [Detnet] new draft on segment routing approach to TSN
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/4WZocfGZOYy5Gq4jaZdSLM0uTuY>
Subject: Re: [spring] new draft on segment routing approach to TSN
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Hi Yaakov,

many thanks for this well-written and information-rich draft.
I have enjoyed to read it (and also the discussions on the lists). :--)))


Conceptual (clarification) questions:
1, What is the node behavior if deadtime expires? Drop? That requires a qui=
te good design/allocation of the latency budget. Otherwise it may result in=
 unnecessary loss of a packet being relative late at a hop, however that mi=
ght be compensated by the remaining hops. (E.g., see your Figure 2, getting=
 35 microsecond at R1 instead of the designed 25, but R2,R3,R4 adds only 10=
-10-10 extra microseconds). You may consider to add a "late flag" to the pa=
cket instead of a drop ...

2, Do I understand it correctly that the described solution is practically =
a new per-hop-behavior? Does it have no tools to "influence" the arrival ti=
me at the next hops? In end-to-end latency design the DetNet/TSN functions =
are often used to "adapt" the arrival of packets belonging to a DetNet flow=
/TSN stream at given network points. If "latency design" requires such a "t=
ime shift" then the described method has to be combined with other DetNet/T=
SN tools.

3, Design of a guaranteed upper bound usually requires deterministic arriva=
l at each node along the path. In this solution the flow becomes less-an-le=
ss deterministic as it reaches the destination. I mean e.g., as per Figure =
2, arrival time range at R1 is 2-2 usec, at R2 is 26-51 usec, at R3 is 70-1=
20 usec and at R4 is 92-167 usec. So, the flow is getting less-and-less det=
erministic at each hop. That can make deterministic design of other flows p=
assing R4 more difficult or even impossible in some scenarios. Have I misse=
d something here?

4, Wire-speed timestamping and calculation: I would be interested in your v=
iew regarding how realistic are (1) the wire speed timestamping capability =
and (2) adding multiple calculated deadline to packets. Both are required f=
or this solution. DetNet flows can have high bandwidth, not like 1588 packe=
ts.


Specific comments (Section 2-3):
5, Time gated Queuing [802.1Qbv] allows multiple gates to be open simultane=
ously. Furthermore preemption [802.1Qbu] can be combined with Qbv. So I can=
not fully agree with your evaluation of time-aware scheduling. (Section 2, =
"However, time-aware scheduling suffers from two major disadvantages.") Of =
course with a bad design one may shoot in his/her own leg, but in well-desi=
gned scenarios efficiency loss can be eliminated without expensive computat=
ion.

6, Deadtime calculation is also complex if impact of other DetNet flows mus=
t be considered. The pre-calculation of individual "local" deadlines may ne=
ed to be re-calculated when flows added to the network and they are using s=
ome common links. So I cannot agree with your statement. (Section 3, "... S=
ince the ingress router inserts the deadline stack into the packet headers,=
 no other router needs to be aware of the requirements of the time sensitiv=
e flows.  Hence admitting a new flow only requires updating the information=
 base of the ingress router."). Adding a flow may result in updating many i=
ngress routers' configuration.


Some topics for further discussions/considerations:
7, Impact of some DetNet functions (e.g., PREOF [RFC8655]) needs further di=
scussions. The usage of replication/elimination impacts the deadline calcul=
ation. Disjoint paths used by member flows requires different label stack a=
nd deadlines. Furthermore, these path specific labels+deadlines must be add=
ed by the replication node (PRF). So at least, a combination of PRF with B-=
SID and computing/adding deadlines (ingress SRTSN function) seems to be nec=
essary in your solution.

8, The ever-green topic ( and not the green-wave :--))) ): label stack size=
. You need multiple labels per hop and the label stack contains them for ea=
ch hop. Could result in a quite big label stack to be pushed at the ingress=
 (nx10s of labels).


I am happy to have further discussions on this interesting idea

Thanks & Cheers
Bala'zs

From: detnet <detnet-bounces@ietf.org> On Behalf Of Yaakov Stein
Sent: Tuesday, February 23, 2021 2:14 PM
To: detnet@ietf.org; spring@ietf.org; pce@ietf.org
Subject: [Detnet] new draft on segment routing approach to TSN

All,

I would like to call your attention to a new ID https://www.ietf.org/archiv=
e/id/draft-stein-srtsn-00.txt
which describes using a stack-based approach (similar to segment routing) t=
o time sensitive networking.
It furthermore proposes combining segment routing with this approach to TSN
resulting in a unified approach to forwarding and scheduling.

The draft is information at this point, since it discusses the concepts and=
 does not yet pin down the precise formats.

Apologies for simultaneously sending to 3 lists,
but I am not sure which WG is the most appropriate for discussions of this =
topic.

  *   DetNet is most relevant since the whole point is to control end-to-en=
d latency of a time-sensitive flow.
  *   Spring is also directly relevant due to the use of a stack in the hea=
der and the combined approach just mentioned.
  *   PCE is relevant to the case of a central server jointly computing an =
optimal path and local deadline stack.
I'll let the chairs decide where discussions should be held.

Y(J)S


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<p class=3D"MsoNormal">Hi Yaakov,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">many thanks for this well-written and information-ri=
ch draft.<o:p></o:p></p>
<p class=3D"MsoNormal">I have enjoyed to read it (and also the discussions =
on the lists). :--)))<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>
<p class=3D"MsoNormal"><b>Conceptual (clarification) questions:<o:p></o:p><=
/b></p>
<p class=3D"MsoNormal">1, What is the node behavior if deadtime expires? Dr=
op? That requires a quite good design/allocation of the latency budget. Oth=
erwise it may result in unnecessary loss of a packet being relative late at=
 a hop, however that might be compensated
 by the remaining hops. (E.g., see your Figure 2, getting 35 microsecond at=
 R1 instead of the designed 25, but R2,R3,R4 adds only 10-10-10 extra micro=
seconds). You may consider to add a &quot;late flag&quot; to the packet ins=
tead of a drop ...<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">2, Do I understand it correctly that the described s=
olution is practically a new per-hop-behavior? Does it have no tools to &qu=
ot;influence&quot; the arrival time at the next hops? In end-to-end latency=
 design the DetNet/TSN functions are often used
 to &quot;adapt&quot; the arrival of packets belonging to a DetNet flow/TSN=
 stream at given network points. If &quot;latency design&quot; requires suc=
h a &quot;time shift&quot; then the described method has to be combined wit=
h other DetNet/TSN tools.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">3, Design of a guaranteed upper bound usually requir=
es deterministic arrival at each node along the path. In this solution the =
flow becomes less-an-less deterministic as it reaches the destination. I me=
an e.g., as per Figure 2, arrival
 time range at R1 is 2-2 usec, at R2 is 26-51 usec, at R3 is 70-120 usec an=
d at R4 is 92-167 usec. So, the flow is getting less-and-less deterministic=
 at each hop. That can make deterministic design of other flows passing R4 =
more difficult or even impossible
 in some scenarios. Have I missed something here?<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">4, Wire-speed timestamping and calculation: I would =
be interested in your view regarding how realistic are (1) the wire speed t=
imestamping capability and (2) adding multiple calculated deadline to packe=
ts. Both are required for this solution.
 DetNet flows can have high bandwidth, not like 1588 packets.<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>
<p class=3D"MsoNormal"><b>Specific comments (Section 2-3):<o:p></o:p></b></=
p>
<p class=3D"MsoNormal">5, Time gated Queuing [802.1Qbv] allows multiple gat=
es to be open simultaneously. Furthermore preemption [802.1Qbu] can be comb=
ined with Qbv. So I cannot fully agree with your evaluation of time-aware s=
cheduling. (Section 2, &quot;However, time-aware
 scheduling suffers from two major disadvantages.&quot;) Of course with a b=
ad design one may shoot in his/her own leg, but in well-designed scenarios =
efficiency loss can be eliminated without expensive computation.<o:p></o:p>=
</p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">6, Deadtime calculation is also complex if impact of=
 other DetNet flows must be considered. The pre-calculation of individual &=
quot;local&quot; deadlines may need to be re-calculated when flows added to=
 the network and they are using some common
 links. So I cannot agree with your statement. (Section 3, &quot;... Since =
the ingress router inserts the deadline stack into the packet headers, no o=
ther router needs to be aware of the requirements of the time sensitive flo=
ws.&nbsp; Hence admitting a new flow only
 requires updating the information base of the ingress router.&quot;). Addi=
ng a flow may result in updating many ingress routers' configuration.<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>
<p class=3D"MsoNormal"><b>Some topics for further discussions/consideration=
s:<o:p></o:p></b></p>
<p class=3D"MsoNormal">7, Impact of some DetNet functions (e.g., PREOF [RFC=
8655]) needs further discussions. The usage of replication/elimination impa=
cts the deadline calculation. Disjoint paths used by member flows requires =
different label stack and deadlines.
 Furthermore, these path specific labels+deadlines must be added by the rep=
lication node (PRF). So at least, a combination of PRF with B-SID and compu=
ting/adding deadlines (ingress SRTSN function) seems to be necessary in you=
r solution.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">8, The ever-green topic ( and not the green-wave :--=
))) ): label stack size. You need multiple labels per hop and the label sta=
ck contains them for each hop. Could result in a quite big label stack to b=
e pushed at the ingress (nx10s of
 labels).<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>
<p class=3D"MsoNormal">I am happy to have further discussions on this inter=
esting idea<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks &amp; Cheers<o:p></o:p></p>
<p class=3D"MsoNormal">Bala'zs<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> detnet &lt;detnet-bounces@ietf.org&gt; =
<b>On Behalf Of
</b>Yaakov Stein<br>
<b>Sent:</b> Tuesday, February 23, 2021 2:14 PM<br>
<b>To:</b> detnet@ietf.org; spring@ietf.org; pce@ietf.org<br>
<b>Subject:</b> [Detnet] new draft on segment routing approach to TSN<o:p><=
/o:p></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">All, <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I would like to call your attention to a new ID <a h=
ref=3D"https://www.ietf.org/archive/id/draft-stein-srtsn-00.txt">
https://www.ietf.org/archive/id/draft-stein-srtsn-00.txt</a> <o:p></o:p></p=
>
<p class=3D"MsoNormal">which describes using a stack-based approach (simila=
r to segment routing) to time sensitive networking.<o:p></o:p></p>
<p class=3D"MsoNormal">It furthermore proposes combining segment routing wi=
th this approach to TSN<o:p></o:p></p>
<p class=3D"MsoNormal">resulting in a unified approach to forwarding and sc=
heduling.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The draft is information at this point, since it dis=
cusses the concepts and does not yet pin down the precise formats.<o:p></o:=
p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Apologies for simultaneously sending to 3 lists, <o:=
p></o:p></p>
<p class=3D"MsoNormal">but I am not sure which WG is the most appropriate f=
or discussions of this topic.<o:p></o:p></p>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso-list:l0 level1 =
lfo3">DetNet is most relevant since the whole point is to control end-to-en=
d latency of a time-sensitive flow.<o:p></o:p></li><li class=3D"MsoListPara=
graph" style=3D"margin-left:0in;mso-list:l0 level1 lfo3">Spring is also dir=
ectly relevant due to the use of a stack in the header and the combined app=
roach just mentioned.<o:p></o:p></li><li class=3D"MsoListParagraph" style=
=3D"margin-left:0in;mso-list:l0 level1 lfo3">PCE is relevant to the case of=
 a central server jointly computing an optimal path and local deadline stac=
k.<o:p></o:p></li></ul>
<p class=3D"MsoNormal">I&#8217;ll let the chairs decide where discussions s=
hould be held.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Y(J)S<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</body>
</html>

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From: Rishabh Parekh <rishabhp@gmail.com>
Date: Fri, 26 Feb 2021 09:41:02 -0800
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To: Weiqiang Cheng <chengweiqiang@chinamobile.com>
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Subject: Re: [spring] Whether the Point-to-multipoint requirement is in scope of SPRING?
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Weiqiang,
Text quoted below from the SPRING charter indirectly covers
Point-to-Multipoint requirement which is addressed by SR Replication
Segment draft
https://datatracker.ietf.org/doc/draft-ietf-spring-sr-replication-segment/ .

New types of segments mapping to forwarding behaviour (e.g., local
ingress replication, local forwarding resources, a pre-existing
replication structure) if needed for new usages.

For the Point-to-Multipoint compression requirement, what exactly is
"multicast address" in the Metric? Is this an IPv6 multicast address? If
so, it really does not conform to SRv6 data plane.

I would rather consider the SRv6 Replication SID, described in the latest
version of SR Replication segment draft, to be the Metric for measuring
P2MP requirement. Maybe we should also consider adding it to SRv6
Functionality Section 4.2.1 of the compression requirements draft.

-Rishabh

On Wed, Feb 24, 2021 at 6:07 PM Weiqiang Cheng <
chengweiqiang@chinamobile.com> wrote:

> Hi Chairs and group,
>
>
>
> SRCOMP design team is discussing the Point-to-multipoint requirement for
> SR compression as text below.
>
> But we observed that the SPRING charter did not mention
> point-to-multipoint content.
>
>
>
> One question for SPRING WG:
>
> Whether the Point-to-multipoint requirement is in scope of SPRING?
>
>
>
> ===
>
> Short Name: Point-to-Multipoint
>
>
>
>    Description: The compression mechanism SHOULD support point-to-
>
>    multipoint SR paths.
>
>
>
>    Rationale: Many VPN services require point-to-multipoint SR paths.
>
>
>
>    Metric: A compliant proposal can encode a multicast address in the
>
>    ultimate segment of the segment list.
>
>
>
>
>
> B.R.
>
> Weiqiang Cheng on behalf of SRCOMP DT
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
>

--00000000000044072d05bc40c6d8
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<div dir=3D"ltr"><div>Weiqiang,</div><div>Text quoted below from the SPRING=
 charter indirectly covers Point-to-Multipoint requirement which is address=
ed by SR Replication Segment draft <a href=3D"https://datatracker.ietf.org/=
doc/draft-ietf-spring-sr-replication-segment/">https://datatracker.ietf.org=
/doc/draft-ietf-spring-sr-replication-segment/</a> .<br></div><div>
<pre>New types of segments mapping to forwarding behaviour (e.g., local
ingress replication, local forwarding resources, a pre-existing
replication structure) if needed for new usages.</pre>

</div><div>For the Point-to-Multipoint compression requirement, what exactl=
y is &quot;multicast address&quot; in the Metric? Is this an IPv6 multicast=
 address? If so, it really does not conform to SRv6 data plane. <br></div><=
div><br></div><div>I would rather consider the SRv6 Replication SID, descri=
bed in the latest version of SR Replication segment draft, to be the Metric=
 for measuring P2MP requirement. Maybe we should also consider adding it to=
 SRv6 Functionality Section 4.2.1 of the compression requirements draft.</d=
iv><div><br></div><div>-Rishabh<br></div></div><br><div class=3D"gmail_quot=
e"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Feb 24, 2021 at 6:07 PM We=
iqiang Cheng &lt;<a href=3D"mailto:chengweiqiang@chinamobile.com">chengweiq=
iang@chinamobile.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quo=
te" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204=
);padding-left:1ex"><div lang=3D"ZH-CN"><div class=3D"gmail-m_4873917858982=
127979WordSection1"><p class=3D"MsoNormal"><span lang=3D"EN-US">Hi Chairs a=
nd group,<u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-U=
S"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-U=
S">SRCOMP design team is discussing the Point-to-multipoint requirement for=
 SR compression as text below. <u></u><u></u></span></p><p class=3D"MsoNorm=
al"><span lang=3D"EN-US">But we observed that the SPRING charter did not me=
ntion point-to-multipoint content. <u></u><u></u></span></p><p class=3D"Mso=
Normal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p><p class=3D"Mso=
Normal"><span lang=3D"EN-US">One question for SPRING WG:<u></u><u></u></spa=
n></p><p class=3D"MsoNormal"><span lang=3D"EN-US">Whether the Point-to-mult=
ipoint requirement is in scope of SPRING?<u></u><u></u></span></p><p class=
=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p><p class=
=3D"MsoNormal"><span lang=3D"EN-US">=3D=3D=3D<u></u><u></u></span></p><p cl=
ass=3D"MsoNormal"><span lang=3D"EN-US">Short Name: Point-to-Multipoint<u></=
u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=
=A0<u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0=C2=
=A0 Description: The compression mechanism SHOULD support point-to-<u></u><=
u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0=C2=A0 m=
ultipoint SR paths.<u></u><u></u></span></p><p class=3D"MsoNormal"><span la=
ng=3D"EN-US"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span la=
ng=3D"EN-US">=C2=A0=C2=A0 Rationale: Many VPN services require point-to-mul=
tipoint SR paths.<u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=
=3D"EN-US"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span lang=
=3D"EN-US">=C2=A0=C2=A0 Metric: A compliant proposal can encode a multicast=
 address in the<u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=
=3D"EN-US">=C2=A0=C2=A0 ultimate segment of the segment list.<u></u><u></u>=
</span></p><p class=3D"MsoNormal"><span style=3D"font-size:10.5pt" lang=3D"=
EN-US"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D=
"font-size:10.5pt" lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p><p class=
=3D"MsoNormal"><span style=3D"font-size:10.5pt" lang=3D"EN-US">B.R.<u></u><=
u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:10.5pt" la=
ng=3D"EN-US">Weiqiang Cheng on behalf of SRCOMP DT<u></u><u></u></span></p>=
</div></div>_______________________________________________<br>
spring mailing list<br>
<a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a><br=
>
<a href=3D"https://www.ietf.org/mailman/listinfo/spring" rel=3D"noreferrer"=
 target=3D"_blank">https://www.ietf.org/mailman/listinfo/spring</a><br>
</blockquote></div>

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From: Rishabh Parekh <rishabhp@gmail.com>
Date: Fri, 26 Feb 2021 09:50:02 -0800
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--0000000000006fec4e05bc40e6c3
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 Weiqiang,
Text quoted below from the SPRING charter indirectly covers
Point-to-Multipoint requirement which is addressed by SR Replication
Segment draft
https://datatracker.ietf.org/doc/draft-ietf-spring-sr-replication-segment/

New types of segments mapping to forwarding behaviour (e.g., local
ingress replication, local forwarding resources, a pre-existing
replication structure) if needed for new usages.

For the Point-to-Multipoint compression requirement, what exactly is
"multicast address" in the Metric? Is this an IPv6 multicast address? If
so, it really does not conform to SRv6 data plane.

I would rather consider the SRv6 Replication SID, described in the latest
version of SR Replication segment draft, to be the Metric for measuring
P2MP requirement. Maybe we should also consider adding it to SRv6
Functionality Section 4.2.1 of the compression requirements draft.

-Rishabh


On Thu, Feb 25, 2021 at 9:25 AM Weiqiang Cheng <
chengweiqiang@chinamobile.com> wrote:

> Hi All,
>
> Two drafts have been submitted.  Please review them and any comments are
> welcomed.
>
>
>
> Compression requirement draft -04 version provided two more requirements:
>
>
> https://www.ietf.org/archive/id/draft-srcompdt-spring-compression-requirement-04.txt
>
>
>
> Compression analysis draft -00 provided a skeleton for the analysis of 4
> candidate proposals.
>
>
> https://www.ietf.org/archive/id/draft-srcompdt-spring-compression-analysis-00.txt
>
>
>
> B.R.
>
> Weiqiang
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
>

--0000000000006fec4e05bc40e6c3
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">
<div>Weiqiang,</div><div>Text quoted below from the SPRING charter=20
indirectly covers Point-to-Multipoint requirement which is addressed by=20
SR Replication Segment draft <a href=3D"https://datatracker.ietf.org/doc/dr=
aft-ietf-spring-sr-replication-segment/" target=3D"_blank">https://datatrac=
ker.ietf.org/doc/draft-ietf-spring-sr-replication-segment/</a><br></div><di=
v>
<pre>New types of segments mapping to forwarding behaviour (e.g., local
ingress replication, local forwarding resources, a pre-existing
replication structure) if needed for new usages.</pre>

</div><div>For the Point-to-Multipoint compression requirement, what=20
exactly is &quot;multicast address&quot; in the Metric? Is this an IPv6 mul=
ticast=20
address? If so, it really does not conform to SRv6 data plane. <br></div><d=
iv><br></div><div>I
 would rather consider the SRv6 Replication SID, described in the latest
 version of SR Replication segment draft, to be the Metric for measuring
 P2MP requirement. Maybe we should also consider adding it to SRv6=20
Functionality Section 4.2.1 of the compression requirements draft.</div><di=
v><br></div><div>-Rishabh<br></div><font color=3D"#888888"><div><br></div><=
/font>

</div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">=
On Thu, Feb 25, 2021 at 9:25 AM Weiqiang Cheng &lt;<a href=3D"mailto:chengw=
eiqiang@chinamobile.com">chengweiqiang@chinamobile.com</a>&gt; wrote:<br></=
div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bor=
der-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=3D"ZH-CN"><=
div><p class=3D"MsoNormal"><span lang=3D"EN-US">Hi All,<u></u><u></u></span=
></p><p class=3D"MsoNormal"><span lang=3D"EN-US">Two drafts have been submi=
tted.=C2=A0 Please review them and any comments are welcomed.<u></u><u></u>=
</span></p><p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u>=
</span></p><p class=3D"MsoNormal"><span lang=3D"EN-US">Compression requirem=
ent draft -04 version provided two more requirements: <u></u><u></u></span>=
</p><p><span lang=3D"EN-US"><a href=3D"https://www.ietf.org/archive/id/draf=
t-srcompdt-spring-compression-requirement-04.txt" target=3D"_blank">https:/=
/www.ietf.org/archive/id/draft-srcompdt-spring-compression-requirement-04.t=
xt</a><u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US">=
<u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US">=
Compression analysis draft -00 provided a skeleton for the analysis of 4 ca=
ndidate proposals.<u></u><u></u></span></p><p class=3D"MsoNormal"><span lan=
g=3D"EN-US"><a href=3D"https://www.ietf.org/archive/id/draft-srcompdt-sprin=
g-compression-analysis-00.txt" target=3D"_blank">https://www.ietf.org/archi=
ve/id/draft-srcompdt-spring-compression-analysis-00.txt</a><u></u><u></u></=
span></p><p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></=
span></p><p class=3D"MsoNormal"><span lang=3D"EN-US">B.R.<u></u><u></u></sp=
an></p><p class=3D"MsoNormal"><span lang=3D"EN-US">Weiqiang<u></u><u></u></=
span></p></div></div>_______________________________________________<br>
spring mailing list<br>
<a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org</a><br=
>
<a href=3D"https://www.ietf.org/mailman/listinfo/spring" rel=3D"noreferrer"=
 target=3D"_blank">https://www.ietf.org/mailman/listinfo/spring</a><br>
</blockquote></div>

--0000000000006fec4e05bc40e6c3--


From nobody Sat Feb 27 10:19:27 2021
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Date: Sat, 27 Feb 2021 19:19:08 +0100
From: Toerless Eckert <tte@cs.fau.de>
To: "Pascal Thubert (pthubert)" <pthubert=40cisco.com@dmarc.ietf.org>
Cc: Tianran Zhou <zhoutianran@huawei.com>, Yaakov Stein <yaakov_s@rad.com>, "detnet@ietf.org" <detnet@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "pce@ietf.org" <pce@ietf.org>
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Subject: Re: [spring] [Detnet] new draft on segment routing approach to TSN
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To add to Pascals reading list, check out:

https://www.ietf.org/archive/id/draft-stein-srtsn-00.txt

This isn't meaning to endorse all the opinions and conclusions offered, but while probably
not being complete, i found it to be is AFAIK the most comprehensive survey for large scale
network bounded latency.

On Thu, Feb 25, 2021 at 05:40:29PM +0000, Pascal Thubert (pthubert) wrote:
> Hi Yaakov and all:
> 
> Whereever Yaakov decides to place it I'll be there supporting the work. The draft itself is incredibly well-written and information-rich.
> Note that there's also work in RAW that mentions SR operation DetNet related operations (draft-pthubert-raw-architecture<https://tools.ietf.org/html/draft-pthubert-raw-architecture-05>). RAW has vested interest in intelligent forwarding decision, that would be the trademark vs. DetNet. With this draft, the forwarding is not based on Qbv schedule but the forwarder has some latitude as long as it matches the hop deadline. So RAW may be a good place.
> And then there's draft-chen-detnet-sr-based-bounded-latency<https://tools.ietf.org/html/draft-chen-detnet-sr-based-bounded-latency-01>. Ideally all these related items would progress in the same room.
> 
> Also a few notes on the draft itself:
> - maybe use latency instead of delay; it would be nice to maybe define delay as something else, e.g., the delay representing the time the packet spends queued in one hop vs. the latency that is end to end?
> - not sure the term green wave is well understood by the public here; the draft gives the impression that the TSN path is faster than the best effort and involves no queueing. For the most part that is untrue; the latency is bounded but for most flows it is longer than best effort. Best effort can be really fast with passthrough in an empty network. The problem is the long tail and possibly congestion loss. For TSN, there can be very special flows that will traverse the city with all the lights green, but usually there'll be queuing. The difference is that the queueing latency is constant and the overall latency is withing bounds.
> - Time triggered is not the only TSN operation. I wonder what the draft would become with asynchronous shaper in mind. We designed (and as I must announce, patented as US9602420<https://patents.google.com/patent/US9602420>) a system very similar to the one proposed in the draft, but that is designed to adapt QoS depending on whether the packet is early or late vs. its schedule, and not tagging the schedule in the since the latency is considered end to end not hop by hop. The use case is slightly different since we apply this without a global controller and a provable guarantees all flows will meet the deadline - so not really detnet-, but more like a best effort that all flows meet their deadline in a stochastic environment. If Yaakov is interested, we can contribute on that aspect.
> 
> Good luck with the draft,
> 
> Pascal
> 
> 
> From: detnet <detnet-bounces@ietf.org> On Behalf Of Tianran Zhou
> Sent: jeudi 25 février 2021 9:14
> To: Yaakov Stein <yaakov_s@rad.com>; detnet@ietf.org; spring@ietf.org; pce@ietf.org
> Subject: Re: [Detnet] new draft on segment routing approach to TSN
> 
> Hi Yaakov,
> 
> This is an interesting topic.
> After a quick review, there are several questions as follows:
> 1. It's clear to me to have a deadline for each packet. So that router can schedule the packet based on the urgency. But what's the motivation to split the end to end deadline to several local ones?
> 2. How to divide an end to end deadline into several local deadlines? Is there any example algorithm that could be used by the controller?
> 3. As far as I know, most devices do not support edf. I am not sure whether your proposal based on edf could really be useful.
> 
> Cheers,
> Tianran
> 
> 
> From: Pce [mailto:pce-bounces@ietf.org] On Behalf Of Yaakov Stein
> Sent: Tuesday, February 23, 2021 9:14 PM
> To: detnet@ietf.org<mailto:detnet@ietf.org>; spring@ietf.org<mailto:spring@ietf.org>; pce@ietf.org<mailto:pce@ietf.org>
> Subject: [Pce] new draft on segment routing approach to TSN
> 
> All,
> 
> I would like to call your attention to a new ID https://www.ietf.org/archive/id/draft-stein-srtsn-00.txt
> which describes using a stack-based approach (similar to segment routing) to time sensitive networking.
> It furthermore proposes combining segment routing with this approach to TSN
> resulting in a unified approach to forwarding and scheduling.
> 
> The draft is information at this point, since it discusses the concepts and does not yet pin down the precise formats.
> 
> Apologies for simultaneously sending to 3 lists,
> but I am not sure which WG is the most appropriate for discussions of this topic.
> 
>   *   DetNet is most relevant since the whole point is to control end-to-end latency of a time-sensitive flow.
>   *   Spring is also directly relevant due to the use of a stack in the header and the combined approach just mentioned.
>   *   PCE is relevant to the case of a central server jointly computing an optimal path and local deadline stack.
> I'll let the chairs decide where discussions should be held.
> 
> Y(J)S
> 

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


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From: Toerless Eckert <tte@cs.fau.de>
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Subject: Re: [spring] [Detnet] new draft on segment routing approach to TSN
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whow... that was a mayor coyp&paste blunder...
No idea how that went through...
apologies! Correct URL:

https://arxiv.org/pdf/1905.08478.pdf

On Sat, Feb 27, 2021 at 07:19:08PM +0100, Toerless Eckert wrote:
> To add to Pascals reading list, check out:
> 
> https://www.ietf.org/archive/id/draft-stein-srtsn-00.txt
> 
> This isn't meaning to endorse all the opinions and conclusions offered, but while probably
> not being complete, i found it to be is AFAIK the most comprehensive survey for large scale
> network bounded latency.
> 
> On Thu, Feb 25, 2021 at 05:40:29PM +0000, Pascal Thubert (pthubert) wrote:
> > Hi Yaakov and all:
> > 
> > Whereever Yaakov decides to place it I'll be there supporting the work. The draft itself is incredibly well-written and information-rich.
> > Note that there's also work in RAW that mentions SR operation DetNet related operations (draft-pthubert-raw-architecture<https://tools.ietf.org/html/draft-pthubert-raw-architecture-05>). RAW has vested interest in intelligent forwarding decision, that would be the trademark vs. DetNet. With this draft, the forwarding is not based on Qbv schedule but the forwarder has some latitude as long as it matches the hop deadline. So RAW may be a good place.
> > And then there's draft-chen-detnet-sr-based-bounded-latency<https://tools.ietf.org/html/draft-chen-detnet-sr-based-bounded-latency-01>. Ideally all these related items would progress in the same room.
> > 
> > Also a few notes on the draft itself:
> > - maybe use latency instead of delay; it would be nice to maybe define delay as something else, e.g., the delay representing the time the packet spends queued in one hop vs. the latency that is end to end?
> > - not sure the term green wave is well understood by the public here; the draft gives the impression that the TSN path is faster than the best effort and involves no queueing. For the most part that is untrue; the latency is bounded but for most flows it is longer than best effort. Best effort can be really fast with passthrough in an empty network. The problem is the long tail and possibly congestion loss. For TSN, there can be very special flows that will traverse the city with all the lights green, but usually there'll be queuing. The difference is that the queueing latency is constant and the overall latency is withing bounds.
> > - Time triggered is not the only TSN operation. I wonder what the draft would become with asynchronous shaper in mind. We designed (and as I must announce, patented as US9602420<https://patents.google.com/patent/US9602420>) a system very similar to the one proposed in the draft, but that is designed to adapt QoS depending on whether the packet is early or late vs. its schedule, and not tagging the schedule in the since the latency is considered end to end not hop by hop. The use case is slightly different since we apply this without a global controller and a provable guarantees all flows will meet the deadline - so not really detnet-, but more like a best effort that all flows meet their deadline in a stochastic environment. If Yaakov is interested, we can contribute on that aspect.
> > 
> > Good luck with the draft,
> > 
> > Pascal
> > 
> > 
> > From: detnet <detnet-bounces@ietf.org> On Behalf Of Tianran Zhou
> > Sent: jeudi 25 février 2021 9:14
> > To: Yaakov Stein <yaakov_s@rad.com>; detnet@ietf.org; spring@ietf.org; pce@ietf.org
> > Subject: Re: [Detnet] new draft on segment routing approach to TSN
> > 
> > Hi Yaakov,
> > 
> > This is an interesting topic.
> > After a quick review, there are several questions as follows:
> > 1. It's clear to me to have a deadline for each packet. So that router can schedule the packet based on the urgency. But what's the motivation to split the end to end deadline to several local ones?
> > 2. How to divide an end to end deadline into several local deadlines? Is there any example algorithm that could be used by the controller?
> > 3. As far as I know, most devices do not support edf. I am not sure whether your proposal based on edf could really be useful.
> > 
> > Cheers,
> > Tianran
> > 
> > 
> > From: Pce [mailto:pce-bounces@ietf.org] On Behalf Of Yaakov Stein
> > Sent: Tuesday, February 23, 2021 9:14 PM
> > To: detnet@ietf.org<mailto:detnet@ietf.org>; spring@ietf.org<mailto:spring@ietf.org>; pce@ietf.org<mailto:pce@ietf.org>
> > Subject: [Pce] new draft on segment routing approach to TSN
> > 
> > All,
> > 
> > I would like to call your attention to a new ID https://www.ietf.org/archive/id/draft-stein-srtsn-00.txt
> > which describes using a stack-based approach (similar to segment routing) to time sensitive networking.
> > It furthermore proposes combining segment routing with this approach to TSN
> > resulting in a unified approach to forwarding and scheduling.
> > 
> > The draft is information at this point, since it discusses the concepts and does not yet pin down the precise formats.
> > 
> > Apologies for simultaneously sending to 3 lists,
> > but I am not sure which WG is the most appropriate for discussions of this topic.
> > 
> >   *   DetNet is most relevant since the whole point is to control end-to-end latency of a time-sensitive flow.
> >   *   Spring is also directly relevant due to the use of a stack in the header and the combined approach just mentioned.
> >   *   PCE is relevant to the case of a central server jointly computing an optimal path and local deadline stack.
> > I'll let the chairs decide where discussions should be held.
> > 
> > Y(J)S
> > 
> 
> > _______________________________________________
> > detnet mailing list
> > detnet@ietf.org
> > https://www.ietf.org/mailman/listinfo/detnet
> 
> _______________________________________________
> detnet mailing list
> detnet@ietf.org
> https://www.ietf.org/mailman/listinfo/detnet

-- 
---
tte@cs.fau.de


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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Toerless Eckert <tte@cs.fau.de>
CC: "Pascal Thubert (pthubert)" <pthubert=40cisco.com@dmarc.ietf.org>, "Yaakov Stein" <yaakov_s@rad.com>, "spring@ietf.org" <spring@ietf.org>, "detnet@ietf.org" <detnet@ietf.org>, "pce@ietf.org" <pce@ietf.org>, "Tianran Zhou" <zhoutianran@huawei.com>
Thread-Topic: [Detnet] new draft on segment routing approach to TSN
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Subject: Re: [spring] [Detnet] new draft on segment routing approach to TSN
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