On Sun, 17 May 2015, Kevin Darbyshire-Bryant wrote:
Thanks Mikael - some ECN tweakage in progress. I'll see which bits of
the Internet I use break :-)
I have been running this on my macbook for almost 2 years (since I got
it):
$ cat /etc/sysctl.conf
net.inet.tcp.ecn_initiate_out=1
net.inet.tcp.ecn_negotiate_in=1
and this on my linux server for 5+ years:
$ cat /etc/sysctl.conf | grep -i ecn
net.ipv4.tcp_ecn = 1
I used the same on my previous Ubuntu based laptop for 5+ years.
I have yet to encounter any ECN related breakage. I have had significant
problems with IPv6 PMTUD blackholing, but no ECN related problems. I had
ECN related problems back in 2001 (or whenever it was) when Linux first
introduced it due to a lot of firewalls being very paranoid about it, but
then I turned it back on again 5-7 years ago and by then all problems were
gone.
--
Mikael Abrahamsson email: [email protected]
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