Re: [quicwg/base-drafts] active_connection_id_limit defaults to 0 (#3197)

Kazuho Oku <> Thu, 07 November 2019 02:29 UTC

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From: Kazuho Oku <>
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Subject: Re: [quicwg/base-drafts] active_connection_id_limit defaults to 0 (#3197)
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> The implication, of course, is that 0 => infinite, but we don't actually say that anywhere. (This part might be editorial; it omits to say what we all know it means.)
> 1 is also a mostly-invalid value, since you can't avoid exceeding that limit without the peer dropping to zero CIDs in the interim and therefore stalling the connection for an RTT + any recovery time needed.

I am literally not sure if this is the case.

As I've pointed out in, the normative language suggests that active_connection_id_limit actually means the number of "spare" CIDs that should be available, though the definition of "active connection ID" is defined differently.

_If_ we are to consider the normative language as being correct, it would be totally valid to set active_connection_id_limit to 1 (i.e. I want one spare CID!), or 0 (i.e. I do not want any).

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