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Re: [tsvwg] RFC 4301 on ECN codepoints (was RE: L4S vs SCE (Evolvability))

Jonathan Morton <chromatix99@gmail.com> Fri, 03 January 2020 21:05 UTC

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From: Jonathan Morton <chromatix99@gmail.com>
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Date: Fri, 03 Jan 2020 23:05:10 +0200
Cc: Ingemar Johansson S <ingemar.s.johansson=40ericsson.com@dmarc.ietf.org>, "Black, David" <David.Black@dell.com>, Bob Briscoe <ietf@bobbriscoe.net>, Roland Bless <roland.bless@kit.edu>, "tsvwg-chairs@ietf.org" <tsvwg-chairs@ietf.org>, "tsvwg@ietf.org" <tsvwg@ietf.org>
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To: Ingemar Johansson S <ingemar.s.johansson@ericsson.com>
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Subject: Re: [tsvwg] RFC 4301 on ECN codepoints (was RE: L4S vs SCE (Evolvability))
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> On 3 Jan, 2020, at 11:13 am, Ingemar Johansson S <ingemar.s.johansson@ericsson.com> wrote:
> 
> Thanks for the response. I assume then that RFC4301 should be listed as a
> possible issue for SCE, as already pointed out by Bob ?

Only to the extent that it forces a reversion to backwards compatible behaviour.  It's a performance thing rather than a safety thing, and as such it's a situation we can live with.

It does not, for example, prevent the safe deployment of SCE endpoints and middleboxes, in the way that RFC-3168 compliant middleboxes presently do for L4S endpoints.

 - Jonathan Morton

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