Re: [quicwg/base-drafts] Describe a new version negotiation mechanism which allows for (#1755)

Mike Bishop <> Fri, 28 September 2018 16:30 UTC

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From: Mike Bishop <>
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Subject: Re: [quicwg/base-drafts] Describe a new version negotiation mechanism which allows for (#1755)
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I think we don't want to remove the client's initially-offered version or the server's list of other supported versions -- they're there for valid reasons and are still needed.  The client's original version is used for the server to ensure that the VN wasn't spurious.  The server's other supported versions are useful for the client to remember and pick a more-preferred version next time.

This optimization should strictly add to the VN information in the handshake, with a list of compatible version the server could switch to in its response.

(The suggestion that such compatible versions would include near-final draft versions and the final RFC is definitely intriguing from a deployment standpoint, incidentally.)

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