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Re: [quicwg/base-drafts] PMTUD (#64)

martinduke <notifications@github.com> Sat, 31 December 2016 05:45 UTC

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Date: Fri, 30 Dec 2016 21:45:04 -0800
From: martinduke <notifications@github.com>
To: quicwg/base-drafts <base-drafts@noreply.github.com>
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Subject: Re: [quicwg/base-drafts] PMTUD (#64)
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On Tue, Dec 13, 2016 at 9:04 AM, ianswett <notifications@github.com> wrote:

>
> Right, what I had in mind was completing the handshake, then sending out a
> RFC 4821 style PMTUD packet and if an ICMP message comes back, try that
> size one more time to see if it gets through. If the original probe got
> through, even though an ICMP message was received, then QUIC should ignore
> the ICMP message and stick with the probed size.


Because there is no retransmission ambiguity, there is no need to try the
larger size again. If the ack comes back for the original packet, than the
ICMP message is spurious.

I probably should have put this consideration in the pull request.


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