I was of the understanding that requests and responses should be re-transmitted irrespective of the transport reliability in case of unreliable hops on the route. However I had reason to question that understanding and upon checking the RFC I'm now not sure what the correct behaviour is?
"13.3.1.4 The INVITE is Accepted ... Since 2xx is retransmitted end-to-end, there may be hops between UAS and UAC that are UDP. To ensure reliable delivery across these hops, the response is retransmitted periodically even if the transport at the UAS is reliable." Seemingly conflicts with. "17.1.1.1 Overview of INVITE Transaction ... The request is not retransmitted over reliable transports. ... For unreliable transports, that response is retransmitted periodically, and for reliable transports, it is sent once." Aaron _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
