Re: [quicwg/base-drafts] Don't change CID on peer CID change (#2145)

Mike Bishop <> Thu, 13 December 2018 20:22 UTC

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From: Mike Bishop <>
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Subject: Re: [quicwg/base-drafts] Don't change CID on peer CID change (#2145)
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IIRC, @ekr is correct; we agreed to do this on peer address change.

- If you don't know you've been rebound and you reuse a CID, you've already linked yourself; the peer changing CID in response is pointless.
- If you either anticipate a rebinding or proactively change ports, and change both CID and address simultaneously, then it doesn't matter which of those triggers the peer to switch.
- If you switch CID without changing address, the address links you with fairly high probability anyway, so it doesn't really matter if the peer switches.

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