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SubjectRe: [PATCH] document ECN in 2.4
On Sun, 5 Nov 2000, Barry K. Nathan wrote:

> + 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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