[Ecn-sane] osx not doing ecn for me

[Pete Heist]

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...

> 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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