Comments inline....
Thanks, Nataraju A B > -----Original Message----- > From: [email protected] [mailto:sip- > [email protected]] On Behalf Of Iñaki Baz > Castillo > Sent: 20 January 2011 13:14 > To: Kondaveeti Seshagiri > Cc: RahulSrivastava 71616; [email protected] > Subject: Re: [Sip-implementors] Query > > 2011/1/20 Kondaveeti Seshagiri <[email protected]>: > > If proxy not retransmit non-2XX final responses to a TCP UAC, then > > What is difference between transport over UDP and TCP? > > non 2XX responses are hop by hop, so if a SIP UAS or proxy replies a > non-2XX via TCP it doesn't need to send retransmissions as it > *already* knows that the response has been received by the UAC or > previous proxy (due to the usage of TCP). [ABN] if any proxy needs to interface between TCP (ingress) and UDP (egress) and vice versa, then it shall implement the stateful(TSF/CSF) proxy functionality.... Proxy being stateless, cannot interface between TCP and UDP transports... </3261 ... sec 16.1> In some circumstances, a proxy MAY forward requests using stateful transports (such as TCP) without being transaction-stateful. For instance, a proxy MAY forward a request from one TCP connection to another transaction statelessly as long as it places enough information in the message to be able to forward the response down the same connection the request arrived on. Requests forwarded between different types of transports where the proxy's TU must take an active role in ensuring reliable delivery on one of the transports MUST be forwarded transaction statefully. </3261> > > -- > Iñaki Baz Castillo > <[email protected]> > > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
