[Ecn-sane] osx not doing ecn for me

[Holland, Jake]

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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