Re: [tsvwg] FQ & VPNs

Ingemar Johansson S <ingemar.s.johansson@ericsson.com> Mon, 22 February 2021 06:07 UTC

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From: Ingemar Johansson S <ingemar.s.johansson@ericsson.com>
To: Tom Henderson <tomh@tomh.org>, Sebastian Moeller <moeller0@gmx.de>
CC: TSVWG <tsvwg@ietf.org>
Thread-Topic: [tsvwg] FQ & VPNs
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Subject: Re: [tsvwg] FQ & VPNs
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Hi Tom, Sebastian
Just to clarify.. there is no SCE alternative on the table in TSVWG. SCE is only an individual contribution, it is not a WG item. L4S got a wide support, while SCE was only supported by a few when this discussion was brought up 9-10 months ago.
Only Sebastian and others can explain why they repeatedly bring up SCE over and over again..

Tom: I think the two step approach proposed by you is definitely worth a closer look.

/Ingemar

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________________________________
Från: tsvwg <tsvwg-bounces@ietf.org> på uppdrag av Tom Henderson <tomh@tomh.org>
Skickat: måndag, februari 22, 2021 12:37 fm
Till: Sebastian Moeller
Kopia: TSVWG
Ämne: Re: [tsvwg] FQ & VPNs


>
>        [SM] Why? Honest question. Sure L4S requires exclusive access to ECT(1) but in SCE promoting a weak ECT(1) to a stronger CE at a later node seems like exactly the right behavior.

Sebastien,
OK, I see your point now; keeping legacy behavior would still allow
legacy code to generate CE for an SCE flow.  However, it would have to
be a multiple bottleneck scenario with the second bottleneck being the
classic one for this to matter, I suppose.

I was hoping to propose a way forward for the backward compatibility
concerns by decoupling these steps, but if it is not agreeable, I guess
the deadlock remains.

- Tom