Re: [quicwg/base-drafts] Clarify simultaneous path validation (#3932)

[Martin Thomson <[e-mail]>]

@ianswett, do you want to think about how you reached your conclusion here and see if there is something we can do to avoid that?  It seems to me that the cost to a server is limited by how many paths it wants to probe, not how many the client probes, so the state is well managed.

It's a little less neat if the client actively migrates multiple times.  But I would say that the server can abandon probes to keep the number of active probes down to at most 2 (one for the most recent *validated* path, one for the most recent *active* path).  Is that something we need to explain more thoroughly?

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