Hi ,

I have a question on a specific behavior seen with a Proxy, the behavior
is as follows.

UAC                                        Proxy
|---Invite(req-URI:A, callid:1, Ftag=1)----->|
|                                            |
|<----Invite(URI:B, callid:1,ftag=2)---------|

And the Proxy Record-Routes as well retaining the Original Contact.

In this specific case the UAC on seeing a call-id which it generated
with a different From Tag is failing the Invite Request.

Question is whether it is a correct behavior on the Proxy to change the
>From Tag retaining the same call-id in the above case.

I would also like opinion on what shld be the behavior of UAC in this
case. The UAC is assuming that Call-id is globally unique and is able to
detect that this call-id belongs to itself and since the From tag is not
matching with what it generated it is failing the request.

Thanks

Kasturi Narayanan   


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