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Date: Mon, 6 Nov 2000 12:11:53 +0100
From: Andi Kleen <ak@suse.de>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Andrew Morton <andrewm@uow.edu.au>, Oliver Xymoron <oxymoron@waste.org>,
        barryn@pobox.com, linux-kernel@vger.kernel.org,
        jamal <hadi@cyberus.ca>
Subject: Re: [PATCH] document ECN in 2.4 Configure.help
Message-ID: <20001106121153.A14104@gruyere.muc.suse.de>
In-Reply-To: <3A068C00.272BD5D2@uow.edu.au> <E13sk36-00066o-00@the-village.bc.nu>
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In-Reply-To: <E13sk36-00066o-00@the-village.bc.nu>; from alan@lxorguk.ukuu.org.uk on Mon, Nov 06, 2000 at 11:02:47AM +0000
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On Mon, Nov 06, 2000 at 11:02:47AM +0000, Alan Cox wrote:
> >        with the TCP ECN_ECHO and CWR flags set, to indicate
> >        ECN-capability, then the sender should send its second
> >        SYN packet without these flags set. This is because
> 
> Now that is nice. The end user perceived effect is that folks with faulty 
> firewalls have horrible slow web sites with a 3 or 4 second wait for each
> page. The perfect incentive. If only someone could do the same to path mtu
> discovery incompetents.

And it penalizes good guys.
If the host cannot answer to the first SYN for some legitimate reason 
then it'll never be able to use ECN. 

-Andi

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