Re: [quicwg/base-drafts] Migration with zero-length CID is inadvisable (#3563)

[Martin Thomson <[e-mail]>]

@martinthomson commented on this pull request.



> @@ -2246,6 +2246,14 @@ that packet numbers cannot be used to correlate activity.  This does not prevent
 other properties of packets, such as timing and size, from being used to
 correlate activity.
 
+An endpoint SHOULD NOT initiate migration with a peer that uses a zero-length
+connection ID, for two reasons. First, if the peer routes incoming packets using

What Eric said.  This alone doesn't really motivate the SHOULD NOT; it is just a reason that you might come to regret ignoring it; what matters is the other point.

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