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Re: [aqm] [tcpm] ECN support and usage on the Internet

Rick Jones <rick.jones2@hp.com> Tue, 19 March 2013 14:46 UTC

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Date: Tue, 19 Mar 2013 07:45:59 -0700
From: Rick Jones <rick.jones2@hp.com>
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To: Mikael Abrahamsson <swmike@swm.pp.se>
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Cc: tcpm@ietf.org, Mirja Kühlewind <mirja.kuehlewind@ikr.uni-stuttgart.de>, aqm@ietf.org, iccrg@irtf.org
Subject: Re: [aqm] [tcpm] ECN support and usage on the Internet
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On 03/19/2013 02:22 AM, Mikael Abrahamsson wrote:
> On Tue, 19 Mar 2013, Mirja Kühlewind wrote:
>
>> Do we need to start a campaign to further encourage greater ECN
>> support (also of network providers)? Asking the content providers on
>> the list(s): What are the reasons to not enable ECN support?
>
> Let me speculate:
>
> It's not on by default in Windows. There is little reason to turn it on,
> because "nobody" acts on ECN, and nobody acts on ECN because there is no
> demand for AQM, and even if there was AQM, it would most likely not be
> ECN enabled.

Out of curiosity, which stacks have ECN enabled by default?  To my 
recollection, on netperf.org I had to explicitly enable TCP's use of ECN 
in the kernel which ships with Ubuntu 12.04.

rick jones

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