As Divya correctly said, the CSeq of the ACK matches that in the INVITE. And so would a CANCEL.
CANCEL and ACK have the same CSeq as the INVITE. Regards, Attila >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] Behalf Of Divya >> Sachdeva >> Sent: 16 November 2006 07:14 >> To: Sachin Rastogi >> Cc: [email protected] >> Subject: Re: [Sip-implementors] Re-Invite Cseq >> >> >> Soory but i dont agrree with this as per RFC 3261 in section 13.2,24 >> >> "The header fields of the ACK are constructed >> in the same way as for any request sent within a dialog (see Section >> 12) with the exception of the CSeq and the header fields related to >> authentication. The sequence number of the CSeq header field MUST be >> the same as the INVITE being acknowledged, but the CSeq method MUST >> be ACK. The ACK MUST contain the same credentials as the INVITE." >> >> >> So the Cseq of ACK will be 1 >> >> Rgds >> Divya >> >> On 11/16/06, Sachin Rastogi <[EMAIL PROTECTED]> wrote: >> > >> > Hi Divya, >> > Re-Invite with Cseq 3 is correct. >> > INVITE-200OK with cseq as 1 >> > ACK for INVITE-200OK with Cseq as 2 >> > Re-INVITE with cseq as 3 is a correct. >> > >> > As per Rfc 3261 "Therefore, if >> > the local sequence number is not empty, the value of the local >> > sequence number MUST be *incremented by one*, and this >> value MUST be >> > placed into the CSeq header field. " >> > >> > Regards >> > Sachin >> > >> > >> > On 11/16/06, Divya Sachdeva <[EMAIL PROTECTED]> wrote: >> > >> > > If a session is already established between 2 UAs >> > > and the Cseq for the Invite was 1 then >> > > If i now send a reInvite from UA1 to UA2 what will be >> the Cseq for this >> > > Invite ..will it be incremented by 1 or again any >> arbitary number will >> > > be >> > > chosen >> > > As in my case wheni was implementing ,it got >> incremented from 1 to 3 >> > > .Can >> > > anybody explain me this behaviour >> > > _______________________________________________ >> > > 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 >> _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
