Re: [quicwg/base-drafts] Clarify text around preferred address (#3589)

[Eric Kinnear <[e-mail]>]

@erickinnear commented on this pull request.



> @@ -1084,10 +1084,10 @@ Sending a RETIRE_CONNECTION_ID frame indicates that the connection ID will not
 be used again and requests that the peer replace it with a new connection ID
 using a NEW_CONNECTION_ID frame.
 
-As discussed in {{migration-linkability}}, endpoints limit the use of a
-connection ID to a single network path where possible. Endpoints SHOULD retire
-connection IDs when no longer actively using the network path on which the
-connection ID was used.
+As discussed in {{migration-linkability}}, endpoints MUST limit the use of a
+connection ID to packets sent from a single local address.  Endpoints SHOULD
+retire connection IDs when they are no longer actively using the network path on
+which the connection ID was used.

Updated the text in f7a9c3b to refer to being done with either your local address (migrated to a new address) or your destination address (only relevant for preferred_address and someday maybe server migration). Whenever you're done with an address on either end, you should probably retire the CID that you used with that address.

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