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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