Re: [tsvwg] Chairs slides for interim meeting

["Black, David" <[e-mail]>]

Alex,

Thanks for looking at the slides.

Point taken - not choosing either is a possible outcome (albeit, unlikely, IMHO), but "not both" is the more important point.   I'll revise the slide accordingly.

Also please do note that a decision on the usage of ECT(1) may well outlast the initial proposal to use it (L4S or SCE), as if such a proposal goes forward but does not achieve widespread deployment/usage, it may still leave behind a fair amount of "running code" that knows whether ECT(1) is an input or an output.  Such "running code" would make it harder to flip ECT(1) to the other role in the future.

Thanks, --David

> -----Original Message-----
> From: [e-mail] <[e-mail]>
> Sent: Wednesday, February 19, 2020 6:21 PM
> To: [e-mail]; Black, David
> Subject: Re: [tsvwg] Chairs slides for interim meeting
> 
> 
> [EXTERNAL EMAIL]
> 
> David,
>  one question in advance since I won't be at the meeting:
> The slides say "Choose exactly one, not both". Why 'exactly one', not 'at
> most one'? Should not both proposals need to put a positive case,
> as well as convincing us that they don't break the internet? Since this is the
> last codepoint, a given case may not be sufficient to use it up; and therefore
> both proposals may fail.
> 
> Alex
> 
> 
> 
> 
> On Wednesday, February 19, 2020, 10:28:34 PM GMT, Black, David
> <[e-mail]> wrote:
> 
> 
> 
> 
> 
> 
> 
> 
> I’ve posted the chairs slides for the interim meeting on how we plan (hope?)
> to make progress in the interim meeting and at the Vancouver
> meeting.  They focus on ECT(1) usage.
> 
> 
> 
> These slides and the rest of the materials for the interim meeting are (and
> will be) posted here:  https://datatracker.ietf.org/meeting/interim-2020-
> tsvwg-01/session/tsvwg
> 
> 
> 
> Hint: RFC 4774 “Specifying Alternate Semantics for the Explicit Congestion
> Notification (ECN) Field” is relevant background, especially Section 4.3
> (Option 3:  Friendly Coexistence with Competing Traffic).
> 
> 
> 
> Thanks, --David (with apologies for extending the IETF practice of just-in-time
> slide preparation)
> 
> ----------------------------------------------------------------
> 
> David L. Black, Sr. Distinguished Engineer, Dell EMC
> 
> Dell Technologies, Infrastructure Systems Group
> 
> 176 South St., Hopkinton, MA  01748
> 
> [phone]           Mobile: [phone]
> 
> [e-mail]
> 
> ----------------------------------------------------------------
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> 
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>