[Ecn-sane] [bbr-dev] duplicating the BBRv2 tests at iccrg in flent?

[Neal Cardwell]

On Fri, Apr 5, 2019 at 12:20 PM Jonathan Morton <chromatix99 at gmail.com>
wrote:

> > On 5 Apr, 2019, at 6:10 pm, 'Neal Cardwell' via BBR Development <
> bbr-dev at googlegroups.com> wrote:
> >
> > Right. I didn't mean setting the codel target to 242us. Where the slide
> says "Linux codel with ECN ce_threshold at 242us sojourn time" I literally
> mean a Linux machine with a codel qdisc configured as:
> >
> >   codel ce_threshold 242us
>
> I infer from this that BBR's new ECN support won't work properly with
> standard CE marking behaviour, only with the sort of signal that DCTCP
> requires.  Is that accurate?
>

Yes, that's correct. Thus far BBR v2 is targeting only DCTCP/L4S-style ECN.


> SCE allows providing that sort of high-fidelity congestion signal without
> losing interoperability with RFC-3168 compliant flows.
>

Noted, thanks.

neal
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