Hi, > Does this mean that there is even no recommendation to > reuse existing TCP connection for sending BYE request?
For clarity, there are recommendations concerning the reuse of existing connections. For instance, see RFC 5626 section 4.3; similarly, RFC 5923 discusses the RFC 3261 persistent connection topic and introduces a new reuse mechanism. If I understand the thread correctly, you are wondering if there is a RFC 3263 related recommendation to resolve mid-dialog requests differently from out-of-dialog requests. No recommendation exists; however, RFC 3261 section 8.1.2 discusses the potential for a local policy to behave differently. For instance, you might want to give preference to the previously selected location when resubmitting a request with higher cseq after acting upon failure responses such as 401, 407, 422, and 488. This helps to traverse the same path (e.g. can help with HERFP problem which is discussed within draft-rosenberg-sip-unify-00) and attempts to bypass locations which may have been originally non-responsive. Some vendors have local policies to behave as you are asking. As far as I know, the main complaint is that it can temporarily prevent/delay honoring the DNS configured load balancing and priorities. _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
