[Ecn-sane] osx not doing ecn for me

[Dave Taht]

On Thu, Jan 9, 2020 at 3:30 PM Pete Heist <pete at heistp.net> wrote:
>
> Mine negotiates it, but I’m stuck on 10.13.
>
> This likely isn’t the problem, but I’ve fallen for the trap before that “netstat -sp tcp” needs to be run as root or all counters show 0...

No, that was the trap I'd fallen for. I'd seen it not attempt a couple
negotiations (from looking at the packet captures), then ran that, and
panicked!

Thx!!!!
> > On Jan 9, 2020, at 10:41 PM, Holland, Jake <jholland at akamai.com> wrote:
> >
> > Are you sure it's not just temporarily held down?
> >
> > IIRC Padma said they shut it off for something like an hour or 3
> > whenever they notice an "anomaly", according to a bunch of heuristics
> > that can occasionally hit false positives:
> > https://datatracker.ietf.org/meeting/98/materials/slides-98-maprg-tcp-ecn-experience-with-enabling-ecn-on-the-internet-padma-bhooma-00.pdf
> >
> > Anyway, my mac still asks for ECN, fwiw.  My sysctls say it like this,
> > and tweaking them I would imagine would change it around in ways I'd
> > want to check if I had done anything to them:
> >
> > net.inet.tcp.ecn_timeout: 60
> > net.inet.tcp.ecn_setup_percentage: 100
> > net.inet.tcp.ecn_initiate_out: 2
> > net.inet.tcp.ecn_negotiate_in: 2
> >
> > HTH.
> >
> > -Jake
> >
> > On 2020-01-09, 13:18, "Dave Taht" <dave.taht at gmail.com> wrote:
> >
> > sometime in the last three months my osx box stopped attempting ecn negotiation.
> >
> > It would to verify if its working or not on other osx and ios boxes.
> >
> > --
> > Make Music, Not War
> >
> > Dave Täht
> > CTO, TekLibre, LLC
> > http://www.teklibre.com
> > Tel: 1-831-435-0729
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> >
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-- 
Make Music, Not War

Dave Täht
CTO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-831-435-0729