Hi, I am attaching the ethereal captures, so as to be clear on the problem. I am using the following network setup.
HOST1---HOST2 HOST1(202.125.84.170) and HOST2(202.125.84.171) are windows-XP machines with AOL instant messengers as the UAs. Now a sip call is initiated from HOST1. I am attaching the ethereal capture on HOST2 where the problem behaviour is seen. Packets (1-11) in the capture show the case where the SIP call was established and terminated normally. Packets (12-27) show the case where i observed the problem behavior. Please go through the capture and let me know your comments on this. Regards Mahesh On Tue, 2004-11-30 at 20:49, Nataraju A B wrote: > If you can send the message details it would be easy to find out the > actual problem... > > Otherwise we could only find vague answer which may not be useful to > your actual problem... > > Best Regards, > Nataraju A.B. > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of michael > koehler > Sent: Tuesday, November 30, 2004 4:51 PM > To: mahesh akarapu > Cc: [EMAIL PROTECTED] > Subject: Re: [Sip-implementors] 200 OK after recieving ACK > > Mahesh, > > > when UAS is sending 200 after ACK then it could be that UAS is not > understaending your ACK request. > > ensure that your ACK request is matching: > > - request uri from INVITE (or record route) > - to/from headers incl. TAGS (to-tag from 200) > - call-id from INVITE > - cseq from INVITE > > > > > Have in mind this could also be a proxy bug and without further details > it is only possible to give hints. At least, maybe your ACK is never > reaching the right destination. > > > > Regards, > > Michael > > > On Nov 30, 2004, at 6:17 AM, mahesh akarapu wrote: > > > Hi all, > > I have a doubt regarding how ACK requests are handled. > > I am trying to establish a SIP session. The following is the scenario. > > A------------B > > INV---------> > > <----------100 > > <----------180 > > <----------200 > > ACK---------> > > Till this point, it is OK.But after this there are repeated 200Ok from > > > B > > as below. > > <----------200 > > ACK---------> > > <----------200 > > ACK---------> > > > > I guess according to the RFC 3261, once ACK is received, the UA should > > stop sending the 200 OK.Could someone please tell me if this a > possible > > scenario, that is under what circumstances 200 OK is sent after > > recieving ACK. I could not get the answer for this from the RFC. > > > > Could someone answer this. > > > > thanks > > Mahesh > > > > > > > > _______________________________________________ > > Sip-implementors mailing list > > [EMAIL PROTECTED] > > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > > > > _______________________________________________ > Sip-implementors mailing list > [EMAIL PROTECTED] > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
_______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
