Re: [quicwg/base-drafts] Clarify path validation and connection migration (#4102)

[Mike Bishop <[e-mail]>]

@MikeBishop commented on this pull request.



> -An endpoint uses a new connection ID for probes sent from a new local address;
-see {{migration-linkability}} for further discussion. An endpoint that uses
-a new local address needs to ensure that at least one new connection ID is
-available at the peer. That can be achieved by including a NEW_CONNECTION_ID
-frame in the probe.

The first sentence is probably duplicative, but it leads into the second -- if the peer is to respond *on the same path*, they will need an extra CID, so bundling a NCID frame is a good idea.  (That's actually why NCID is allow in probing packets, IIRC.)  But on the other hand, the peer isn't required to respond on the same path any longer, so no harm done if omitted.

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