Re: [quicwg/base-drafts] Request to Retire Locally Issued CIDs (#2769)

Nick Banks <> Wed, 05 June 2019 14:27 UTC

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From: Nick Banks <>
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Subject: Re: [quicwg/base-drafts] Request to Retire Locally Issued CIDs (#2769)
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nibanks commented on this pull request.

> @@ -994,6 +994,14 @@ packets sent from only one local address.  An endpoint that migrates away from a
 local address SHOULD retire all connection IDs used on that address once it no
 longer plans to use that address.
+The endpoint can explicitly request its peer to retire connection IDs by sending
+a NEW_CONNECTION_ID frame that contains a Retire Prior To field.  The peer is
+required to retire these connection IDs in a timely manner.  On receipt of the
+acknowledgement for the packet that contained the NEW_CONNECTION_ID frame, the
+endpoint may start a 3 PTO timer, which on expiring may close the connection
+with a PROTOCOL_VIOLATION error if all the connection IDs were not retired as

I would also prefer a requirement that the peer MUST change CIDs immediately. I heard push back on that design. I would like to hear reasons why that wouldn't be a good idea, if anyone has some.

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