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

Shwetha Bhandari <shwetha.bhandari@thoughtspot.com> Wed, 27 April 2022 08:06 UTC

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From: Shwetha Bhandari <shwetha.bhandari@thoughtspot.com>
Date: Wed, 27 Apr 2022 13:35:56 +0530
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To: James Guichard <james.n.guichard@futurewei.com>, "sfc-chairs@ietf.org" <sfc-chairs@ietf.org>
Cc: Med Boucadair <mohamed.boucadair@orange.com>, "Frank Brockners (fbrockne)" <fbrockne=40cisco.com@dmarc.ietf.org>, "sfc@ietf.org" <sfc@ietf.org>, "ippm@ietf.org" <ippm@ietf.org>, Tal Mizrahi <tal.mizrahi.phd@gmail.com>, "draft-ietf-sfc-ioam-nsh@ietf.org" <draft-ietf-sfc-ioam-nsh@ietf.org>, Greg Mirsky <gregimirsky@gmail.com>
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Subject: Re: [ippm] [sfc] WGLC for https://datatracker.ietf.org/doc/draft-ietf-sfc-ioam-nsh/
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Dear SFC chairs,

A new version of the draft I-D.ietf-sfc-ioam-nsh has been submitted per the
discussion in this thread.
https://www.ietf.org/rfcdiff?url2=draft-ietf-sfc-ioam-nsh-09
Can we please progress this draft to IESG if there are no further comments?

Thanks,
Shwetha

On Thu, Apr 14, 2022 at 6:41 PM Greg Mirsky <gregimirsky@gmail.com> wrote:

> Hi Shwetha,
> thank you for the proposed resolution. I agree with Med, direct normative
> reference to I-D.ietf-sfc-oam-packet seems like the logical conclusion of
> our discussion of the use of the NSH O bit. Please note that we're
> referring to I-D.ietf-sfc-oam-packet in the Active SFC OAM draft, e.g.,:
>
> The O bit in NSH MUST be set, according to [I-D.ietf-sfc-oam-packet].
>
>
> Regards,
> Greg
>
> On Thu, Apr 14, 2022 at 4:27 AM <mohamed.boucadair@orange.com> wrote:
>
>> 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>
>> *Envoyé :* jeudi 14 avril 2022 12:06
>> *À :* Greg Mirsky <gregimirsky@gmail.com>
>> *Cc :* BOUCADAIR Mohamed INNOV/NET <mohamed.boucadair@orange.com>; Frank
>> Brockners (fbrockne) <fbrockne=40cisco.com@dmarc.ietf.org>;
>> sfc-chairs@ietf.org; sfc@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
>> *Objet :* Re: [sfc] WGLC for
>> https://datatracker.ietf.org/doc/draft-ietf-sfc-ioam-nsh/
>> <https://urldefense.com/v3/__https://datatracker.ietf.org/doc/draft-ietf-sfc-ioam-nsh/__;!!MZ3Fw45to5uY!LWQuxxxKpUum5gUoK44-znjehj2YRtlGMOATxfRVSc-7JOrPsk4BA4iP0oLQE4d0rObPhOCG_1iiipywftwMIMOEWh8lJI4$>
>>
>>
>>
>> Hi Med, Greg,
>>
>>
>>
>> How about this text :
>>
>>
>>
>> “The O-bit MUST be handled following the rules in and any updates
>> to [RFC8300] ."
>>
>>
>>
>> Given that I-D.ietf-sfc-oam-packet  will update RF8300 and there could
>> be others in future?
>>
>>
>>
>> Thanks,
>>
>> Shwetha
>>
>>
>>
>> On Tue, Apr 12, 2022 at 9:24 PM Greg Mirsky <gregimirsky@gmail.com>
>> wrote:
>>
>> Hi Shwetha,
>>
>> I believe that the text you've quoted is helpful. I would suggest
>> changing references from [RFC8300] to [I-D.ietf-sfc-oam-packet] throughout
>> that paragraph.
>>
>>
>>
>> Regards,
>>
>> Greg
>>
>>
>>
>> On Tue, Apr 12, 2022 at 7:56 AM Shwetha Bhandari <
>> shwetha.bhandari@thoughtspot.com> wrote:
>>
>> Med,
>>
>>
>>
>> Thanks for the details: this is exactly what we had before the latest
>> revision:
>>
>> *4.2 <https://urldefense.com/v3/__https:/datatracker.ietf.org/doc/html/draft-ietf-sfc-ioam-nsh-06*section-4.2__;Iw!!MZ3Fw45to5uY!NBsrzhHEf0Y_-Sindy74K4QDA6EWJjx35STSH-UxEi3eYIX0GVli9Sn1azrOPJVcI2qUzWfezK_1D2RpyFB_FOIpJPfzrvI$>.  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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