Sorry in advance if this issue has been discussed many times and the question/answer 
is obvious.

According to RFC 3261: 17.1.1.1 and 17.1.2.1
Requests and/or 2xx responses are being retransmitted ONLY when unreliable transport 
is being used.
But what about the following case:

          TCP                                 UDP
UAC-------------stateless proxy----------------------------UAS

The UAC sends a request, it gets lost on the UDP ifc, and never retransmitted, same 
can happen with the response.

Can that situation indeed happen?

Uri

=======================================================================
Uri Baniel - Distinguished Member of Technical Staff - Motorola  
Tel: (847) 632 4616; Fax: (847) 632 3963; 
"Learning that does not daily increase will daily decrease. - EWC
=======================================================================


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