See RFC 3261 section 8.1.1.7. Your understanding is correct if the branch starts with the magic cookie (which is required by RFC 3261).
> -----Original Message----- > From: sip-implementors-boun...@lists.cs.columbia.edu [mailto:sip- > implementors-boun...@lists.cs.columbia.edu] On Behalf Of NK > Sent: Friday, August 19, 2016 3:20 PM > To: sip-implementors@lists.cs.columbia.edu > Subject: [Sip-implementors] Branch Header in BYE > > Dear All, > > As far as i know Branch Parameter in the VIA Header, must be unique for every > new transaction. > > Which means, when we send the BYE to any dialog, then the BRANCH parameter > will be different as compare the Initial invite. > > However i cannot see any document which stating the same. > > Can you please let me know if my understanding is correct for this and if any > senior can please share the document for this. > > Thank you in advance., > > Regards, > Nitin > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors