[Ecn-sane] BBRv3 ecn_low per-route feature and the CE confusion

[Jonathan Morton]

> On 28 Nov, 2023, at 2:57 pm, Pete Heist via Ecn-sane <ecn-sane at lists.bufferbloat.net> wrote:
> 
> This isn't a problem with BBR. The problem is, we've started an
> experiment [RFC9331] that redefines the meaning of CE in a way that's
> incompatible with existing RFC3168 middleboxes. This feature in BBR is
> just a reflection of that. CCA developers are now tasked with somehow
> deciding which type of CE they're seeing.
> 
> Speaking of ecn "sane", does anyone else see this as not? :) and as a
> problem that needs solving?

Count me in the "not sane" camp, at least.  This is exactly the kind of ambiguity that SCE is designed to avoid.

 - Jonathan Morton