According to RFC 3261
"CSeq or Command Sequence contains an integer and a method name. The CSeq number is incremented for each new request within a dialog and is a traditional sequence number. " CSeq increment is not done for specific request it is done for all the request in the dialog. Regards, Vivek _____ From: [email protected] [mailto:[email protected]] On Behalf Of Dushyant Dhalia Sent: Friday, January 29, 2010 4:52 PM To: OKUMURA Shinji Cc: [email protected] Subject: Re: [Sip-implementors] CSeq of retried INVITE It must be greater that or equal to 3. Dushyant P S Dhalia OKUMURA Shinji wrote: Hi, I have a question regarding CSeq of retried INVITE. Consider the following scenario. | INVITE(CSeq:1) | |--------------------------->| | | | 18x | |<---------------------------| | | | PRACK(CSeq:2) | |--------------------------->| | | | 200 OK(PRACK) | |<---------------------------| | | | 415 | |<---------------------------| | | | ACK | |--------------------------->| | | | INVITE(CSeq:2) | |--------------------------->| | with the same Call-ID | | | according to the section 8.1.3.5 in RFC3261, 2nd INVITE "SHOULD have the same value of the Call-ID, To, and From of the previous request, but the CSeq should contain a new sequence number that is one higher than the previous." therefore, I think the CSeq of 2nd INVITE SHOULD be "2". Is my understanding correct? Regards, Shinji _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors -- "When work is a pleasure, life is a joy! When work is duty, life is slavery." _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
