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Date: Mon, 6 Nov 2000 01:34:14 -0600 (CST)
From: Oliver Xymoron <oxymoron@waste.org>
To: barryn@pobox.com
cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] document ECN in 2.4 Configure.help
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On Sun, 5 Nov 2000, Barry K. Nathan wrote:

> +CONFIG_INET_ECN
> +  Explicit Congestion Notification (ECN) allows routers to notify
> +  clients about network congestion, resulting in fewer dropped packets
> +  and increased network performance. This option adds ECN support to the
> +  Linux kernel, as well as a sysctl (/proc/sys/net/ipv4/tcp_ecn) which
> +  allows ECN support to be disabled at runtime.

You might mention the RFC here, 2481 IIRC.

> +  Note that, on the Internet, there are many broken firewalls which
> +  refuse connections from ECN-enabled machines, and it may be a while
> +  before these firewalls are fixed. Until then, to access a site behind
> +  such a firewall (some of which are major sites, at the time of this
> +  writing) you will have to disable this option, either by saying N now
> +  or by using the sysctl.

I'm still not sure why it's been decided not to do fallback or how this
whole situation is any different from path MTU discovery.

--
 "Love the dolphins," she advised him. "Write by W.A.S.T.E.." 


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