Re: [tsvwg] FQ & VPNs

Tom Henderson <tomh@tomh.org> Sun, 21 February 2021 23:36 UTC

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To: Sebastian Moeller <moeller0@gmx.de>
Cc: Jonathan Morton <chromatix99@gmail.com>, TSVWG <tsvwg@ietf.org>
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From: Tom Henderson <tomh@tomh.org>
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Date: Sun, 21 Feb 2021 15:36:20 -0800
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Subject: Re: [tsvwg] FQ & VPNs
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> 
> 	[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