The UA-2 should send a 491 response for the re-INVITE-2 with a Retry-After header. It is true that the 491 response will not result in the ACK generation for re-INVITE-1 but at the same time the UA-2 should also retransmit the 200 response for the re-INVITE-1 which will result in the ACK from UA-1
Ajay -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Leonid Fainshtein Sent: Saturday, May 20, 2006 3:24 PM To: [email protected] Subject: [Sip-implementors] Miss-ordered re-INVITE request Hi, Is the following UAS behavior correct? UA-1 UA-2 ------INVITE ---------> <------200 ------------ ------- ACK ----------> ------ re-INVITE-1-----> <------200 ------------ ------ re-INVITE-2-----> <------ 400( with Retry-After header) ---- As you can see, the second re-INVITE arrives to the UAS when the previous re-INVITE transaction is not confirmed yet (ACK is not received). What should UAS do in this situation? Silently ignore re-INVITE2? Reject it with response 400 or 500? Thanks, Leonid _______________________________________________ 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
