Hi Thanks for the reply..One more of clarification required.. So If UA wishes to create multiple transport flows with "sip:primary.example.com"(As specified in draft-ietf-sip-outbound-20#section-13 to honor RFC3261 requirement for message size greater than MTU), would it be OK it one FLOW lands on Host1 and other FLOW lands on Host2? i.e for example if "sip:primary.example.com" got resolved into (IP1, Port1, TCP) -> (IP2, Port2, TCP) -> (IP2, Port2, UDP) -> (IP1, Port1, UDP) in that order, and if UA wises to create both TCP and UDP FLOWs with "sip:primary.example.com", then it starts creating TCP FLOW with (IP1, Port1, TCP) and can create a UDP FLOW with (IP2, Port2, UDP) based on RFC 3263 procedures. Is my understanding correct here? In the above example, if (IP1) is down/crashed for some reasons, then "sip:primary.example.com", can never use the TCP FLOW for transporting inbound messages to that UA (Even though the IP1 and IP2 are state synchronized) until User Agent detects the FLOW failure with (IP1) and re-create the TCP FLOW with (IP1 or IP2). Is my understanding correct here? Please clarify.. Regard Srikanth
________________________________ From: Francois Audet [mailto:au...@nortel.com] Sent: Thursday, August 27, 2009 9:22 PM To: Vavilapalli Srikanth-A19563; s...@ietf.org Subject: RE: [Sip] Question on draft-ietf-sip-outbound-20 draft: multiple flowcreation You would have 2. One for primary, and one for secondary. For each one of those, you would use normal RFC 3263 procedures for determining which SRV record to use. ________________________________ From: sip-boun...@ietf.org [mailto:sip-boun...@ietf.org] On Behalf Of Vavilapalli Srikanth-A19563 Sent: Thursday, August 27, 2009 07:57 To: s...@ietf.org Subject: [Sip] Question on draft-ietf-sip-outbound-20 draft: multiple flowcreation Hi As specified in section 3.3/3.4 of draft-ietf-sip-outbound-20 draft, If a UA is configured with a outbound-proxy-set with two proxy uris: "sip:primary.example.com" and "sip:secondary.example.com" And for example, "sip:primary.example.com" got DNS resolved in to two SRV records "Host1" and "Host2" and "sip:secondary.example.com" got DNS resolved in to "Host3" and "Host4", Should UA create four FLOWs, One with each host OR just two FLOWs, one with each proxy URI(i.e one flow with either Host1 or Host2 and second flow with Host3 or Host4)? Please clarify. Regards Srikanth _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
