Re: [ippm] [sfc] WGLC for https://datatracker.ietf.org/doc/draft-ietf-sfc-ioam-nsh/

"Frank Brockners (fbrockne)" <fbrockne@cisco.com> Thu, 14 April 2022 12:24 UTC

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From: "Frank Brockners (fbrockne)" <fbrockne@cisco.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "Shwetha Bhandari" <shwetha.bhandari@thoughtspot.com>, Greg Mirsky <gregimirsky@gmail.com>
CC: "Frank Brockners (fbrockne)" <fbrockne=40cisco.com@dmarc.ietf.org>, "sfc-chairs@ietf.org" <sfc-chairs@ietf.org>, "sfc@ietf.org" <sfc@ietf.org>, "ippm@ietf.org" <ippm@ietf.org>, James Guichard <james.n.guichard@futurewei.com>, Tal Mizrahi <tal.mizrahi.phd@gmail.com>, "draft-ietf-sfc-ioam-nsh@ietf.org" <draft-ietf-sfc-ioam-nsh@ietf.org>
Thread-Topic: [sfc] WGLC for https://datatracker.ietf.org/doc/draft-ietf-sfc-ioam-nsh/
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Date: Thu, 14 Apr 2022 12:24:06 +0000
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Subject: Re: [ippm] [sfc] WGLC for https://datatracker.ietf.org/doc/draft-ietf-sfc-ioam-nsh/
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IMHO it would be better to refer to directly RFC8300 – since this is a stable reference; and it allows us to finish up draft-ietf-sfc-ioam-nsh and get the code points allocated. I-D.ietf-sfc-oam-packet is early stages and still evolving.

Cheers, Frank

From: mohamed.boucadair@orange.com <mohamed.boucadair@orange.com>
Sent: Thursday, 14 April 2022 13:28
To: Shwetha Bhandari <shwetha.bhandari@thoughtspot.com>om>; Greg Mirsky <gregimirsky@gmail.com>
Cc: Frank Brockners (fbrockne) <fbrockne=40cisco.com@dmarc.ietf.org>rg>; sfc-chairs@ietf.org; sfc@ietf.org; ippm@ietf.org; James Guichard <james.n.guichard@futurewei.com>om>; Tal Mizrahi <tal.mizrahi.phd@gmail.com>om>; draft-ietf-sfc-ioam-nsh@ietf.org
Subject: RE: [sfc] WGLC for https://datatracker.ietf.org/doc/draft-ietf-sfc-ioam-nsh/

Hi Shwetha,

I prefer we go for an explicit reference to I-D.ietf-sfc-oam-packet rather than “any update to RFC8300”. This is consistent with the usage in the other OAM draft.

Thank you.

Cheers,
Med

De : Shwetha Bhandari <shwetha.bhandari@thoughtspot.com<mailto:shwetha.bhandari@thoughtspot.com>>
Envoyé : jeudi 14 avril 2022 12:06
À : Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>>
Cc : BOUCADAIR Mohamed INNOV/NET <mohamed.boucadair@orange.com<mailto:mohamed.boucadair@orange.com>>; Frank Brockners (fbrockne) <fbrockne=40cisco.com@dmarc.ietf.org<mailto:fbrockne=40cisco.com@dmarc.ietf.org>>; sfc-chairs@ietf.org<mailto:sfc-chairs@ietf.org>; sfc@ietf.org<mailto:sfc@ietf.org>; ippm@ietf.org<mailto:ippm@ietf.org>; James Guichard <james.n.guichard@futurewei.com<mailto:james.n.guichard@futurewei.com>>; Tal Mizrahi <tal.mizrahi.phd@gmail.com<mailto:tal.mizrahi.phd@gmail.com>>; draft-ietf-sfc-ioam-nsh@ietf.org<mailto:draft-ietf-sfc-ioam-nsh@ietf.org>
Objet : Re: [sfc] WGLC for https://datatracker.ietf.org/doc/draft-ietf-sfc-ioam-nsh/

Hi Med, Greg,

How about this text :

“The O-bit MUST be handled following the rules in and any updates to [RFC8300] ."

Given that I-D.ietf-sfc-oam-packet  will update RF8300 and there could be others in future?

Thanks,
Shwetha

On Tue, Apr 12, 2022 at 9:24 PM Greg Mirsky <gregimirsky@gmail.com<mailto:gregimirsky@gmail.com>> wrote:
Hi Shwetha,
I believe that the text you've quoted is helpful. I would suggest changing references from [RFC8300] to [I-D.ietf-sfc-oam-packet] throughout that paragraph.

Regards,
Greg

On Tue, Apr 12, 2022 at 7:56 AM Shwetha Bhandari <shwetha.bhandari@thoughtspot.com<mailto:shwetha.bhandari@thoughtspot.com>> wrote:
Med,

Thanks for the details: this is exactly what we had before the latest revision:

4.2<https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/html/draft-ietf-sfc-ioam-nsh-06*section-4.2__;Iw!!MZ3Fw45to5uY!NBsrzhHEf0Y_-Sindy74K4QDA6EWJjx35STSH-UxEi3eYIX0GVli9Sn1azrOPJVcI2qUzWfezK_1D2RpyFB_FOIpJPfzrvI$>I$>.  IOAM and the use of the NSH O-bit



   [RFC8300] defines an "O bit" for OAM packets.  Per [RFC8300<https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/html/rfc8300__;!!MZ3Fw45to5uY!NBsrzhHEf0Y_-Sindy74K4QDA6EWJjx35STSH-UxEi3eYIX0GVli9Sn1azrOPJVcI2qUzWfezK_1D2RpyFB_FOIpEB5AbbE$>] the O

   bit must be set for OAM packets and must not be set for non-OAM

   packets.  Packets with IOAM data included MUST follow this

   definition, i.e. the O bit MUST NOT be set for regular customer

   traffic which also carries IOAM data and the O bit MUST be set for

   OAM packets which carry only IOAM data without any regular data

   payload.

This was removed as per the discussion in this thread. Please check https://mailarchive.ietf.org/arch/msg/sfc/srMit5zE8UseNOhxknAw_dqvj6M/<https://urldefense.com/v3/__https:/mailarchive.ietf.org/arch/msg/sfc/srMit5zE8UseNOhxknAw_dqvj6M/__;!!MZ3Fw45to5uY!NBsrzhHEf0Y_-Sindy74K4QDA6EWJjx35STSH-UxEi3eYIX0GVli9Sn1azrOPJVcI2qUzWfezK_1D2RpyFB_FOIp-CeLfeA$>

It looks like we are going in a loop here. This definition of SFC OAM packet to include the OAM data that comes in inner packets via the next protocol header chain is introduced in draft-ietf-sfc-oam-packet to update the RFC8300.
Jim, What are you thoughts on this? Should we reintroduce the above text ?

Thanks,
Shwetha


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