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Re: [spring] [EXTERNAL] Re: Chair Review of draft-ietf-spring-srv6-srh-compression-11

Ron Bonica <rbonica@juniper.net> Thu, 28 March 2024 15:02 UTC

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From: Ron Bonica <rbonica@juniper.net>
To: Alexander Vainshtein <Alexander.Vainshtein@rbbn.com>
CC: Tom Herbert <tom@herbertland.com>, "spring@ietf.org" <spring@ietf.org>, Alvaro Retana <aretana.ietf@gmail.com>, Robert Raszuk <robert@raszuk.net>, Stewart Bryant <stewart.bryant@gmail.com>, Andrew Alston - IETF <andrew-ietf=40liquid.tech@dmarc.ietf.org>
Thread-Topic: [spring] [EXTERNAL] Re: Chair Review of draft-ietf-spring-srv6-srh-compression-11
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Date: Thu, 28 Mar 2024 15:02:08 +0000
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Subject: Re: [spring] [EXTERNAL] Re: Chair Review of draft-ietf-spring-srv6-srh-compression-11
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Sasha,

I think that we are in agreement regarding points 1 and 2. Issue #3 is the bone of contention.

More inline.......

                                   Ron



Juniper Business Use Only

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From: spring <spring-bounces@ietf.org> on behalf of Alexander Vainshtein <Alexander.Vainshtein@rbbn.com>
Sent: Wednesday, March 27, 2024 11:48 AM
To: Ron Bonica <rbonica@juniper.net>
Cc: Tom Herbert <tom@herbertland.com>; spring@ietf.org <spring@ietf.org>; Alvaro Retana <aretana.ietf@gmail.com>; Robert Raszuk <robert@raszuk.net>; Stewart Bryant <stewart.bryant@gmail.com>; Andrew Alston - IETF <andrew-ietf=40liquid.tech@dmarc.ietf.org>
Subject: Re: [spring] [EXTERNAL] Re: Chair Review of draft-ietf-spring-srv6-srh-compression-11

[External Email. Be cautious of content]


Ron,

I think we are – in a way.



  1.  We agree that SRv6 SIDs are not aligned with the IPv6 addressing architecture as defined in RFC 4291
     *   This is recognized by the 6MAN WG and there seems to be a consensus there about the way this can be handled
     *   IMHO and FWIW their proposal is good enough - but beauty is always in the eye of the beholder
  2.  We agree (or so I think) that certain things that happen around SRv6 would be violations of RFC 8200
     *   I have not heard that 6MAN WG has ever agreed to these violations
     *   From my POV such violations must be blocked if SRv6 remains part of IPv6
     *   I think that the SPRING WG recognizes the limits set by RFC 8200, will refrain from crossing these limits
  3.  I object to separation of SRv6 from IPv6 using a new optional Ethertype because:
     *
It is by far too late for that, and, probably, has been too late before SRv6 has been born

[RB] Is it? I think that we have a choice between correcting the error now or watching engineering debt accumulate over the years. Both options are painful. In my experience, it is better to endure a sharp pain that ends quickly than a dull pain that lasts forever.


     *   You cannot force people to use an optional Ethertype while the normal IPv6 Ethertype is allowed, and therefore nothing would be really achieved this way



[RB] I agree that an optional Ethertype will achieve little. It should be mandatory.

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