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SubjectRe: RFC3168, section 6.1.1.1 - ECN and retransmit of SYN
Date
> RFC3168 section 6.1.1.1 says this:
>
> A host that receives no reply to an ECN-setup SYN within the normal
> SYN retransmission timeout interval MAY resend the SYN and any
> subsequent SYN retransmissions with CWR and ECE cleared. To overcome
> normal packet loss that results in the original SYN being lost, the
> originating host may retransmit one or more ECN-setup SYN packets
> before giving up and retransmitting the SYN with the CWR and ECE bits
> cleared.
>
> Supporting this would make using ECN a lot less painful - currently, if
> I want to use ECN by default, I get to turn it off anytime I find an
> ECN-hostile site that I'd like to communicate with.

Linux shouldn't encourage the use of equipment that violates RFCs, in
this case, RFC 739.

The correct way to deal with it, is to contact the maintainers of the
site, and ask them to fix the non conforming equipment.

If the problem is caused upstream, by equipment out of the
site's maintainers' control, it is their responsibility to contact the
relevant maintainers, or change their upstream provider.

John.
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