Re: Constraining transport parameter allocations

Matt Joras <> Tue, 04 May 2021 22:33 UTC

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From: Matt Joras <>
Date: Tue, 04 May 2021 15:33:00 -0700
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Subject: Re: Constraining transport parameter allocations
Cc: Martin Thomson <>, Martin Duke <>
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Hello all,

It is the opinion of the chairs and the editors that this is something
worth fixing with IANA. We are using this email to make a call for any
objections to this change at this stage. This call will run through
May 11th. Please reply with any concerns or further discussion.

QUIC Chairs

On Mon, May 3, 2021 at 5:55 PM Martin Thomson <> wrote:
> Most of our registries reserve the short varint values (0x00-0x3f) for RFCs.  We didn't do that for transport parameters.
> Is there any reason why we should not ask IANA to change this?  The RFC editor noted the discrepancy and I can't say that it was deliberate.
> It is probably an accident.  Remember that we only changed the format of transport parameters fairly late in the process and so we probably missed this when that happened.
> I would like to ask IANA to tweak the registry policies here, but that means we need to be careful.  Minimally, that means AD approval (Hi Zahed).
> See for an issue.
> does this (it's attached to but that pulls in other changes).