Christer Holmberg wrote:
> I don't think the spec is broken. I think the spec was written based on
> the assumption that a UA instance is not interested in receiving an
> INVITE multiple times in parallel (the UA will return 484 for all but
> one INVITE) - which I don't think is desired even in normal forking
> scenarios - but that it should be possible to, if one flow is down,
> choose another flow to reach the UA (read: serial forking).

IIRC, it was a deliberate choice (a feature of the spec) that it prevent
 redundant message delivery, as that would most likely screw up a UA.

The whole point of the instance-id is so that the proxy can know that
two contacts refer to the same UA, and therefore NOT fork request to
both contacts.

--
Dean


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