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Re: [quicwg/base-drafts] Update initial congestion window on MTU decrease (#3998)

ianswett <notifications@github.com> Mon, 17 August 2020 13:55 UTC

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Subject: Re: [quicwg/base-drafts] Update initial congestion window on MTU decrease (#3998)
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@ianswett commented on this pull request.



> +If the maximum datagram size is decreased in order to complete the handshake,
+the initial congestion window SHOULD be recalculated with the new smaller size.
+This avoids overly large initial congestion windows.  The initial window is
+not recalculated at any other time.

Is your specific concern that you pick a max datagram size during the handshake, and then do PMTUD and find the path supports a larger datagram size, but you never increase the initial congestion window?

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