After having discussed this point with some people deeply implied into the IMS Development, they definitely think that's the way an UA should handle the Service-Route. As for myself, I don't see any caveat to this (I would rather see a lot of advantages :)) I'm looking forward to the upcoming revisions Regards, Olivier B. Benny Prijono a ?crit : > Okay, thanks for the info. > > So is appending Service-Route to existing/preconfigured route set > the best approach? Any potential pitfalls with this? (I can't think > of any). > > -benny > > > Olivier Beytrison wrote: >> let me quote the book "The IMS IP Multimedia Concepts and Services" from >> Wiley >> >> Page 180 reguarding the 200 OK returned from a successful Registration >> >> "" >> The UE, when receiving the 200 (OK) response, will store the entries in >> the Service-Route header. Whenever the UE sends out any initial >> requestion other than a REGISTER message, it will : >> >> * include the addresses that were received in the Service-Route header >> within a Route header of the initial requests; and >> * include the P-CSCF address as the topmost Route entry in the initial >> request. >> >> "" >> >> should clear your doubts :) >> >> Regards, >> >> Olivier >> >> Benny Prijono a ?crit : >>> Klaus Darilion wrote: >>>> Olivier Beytrison schrieb: >>>>> I don't think so. Because th P-CSCF address will be mostly assigned by >>>>> DHCP Option. Because when you're are moving with your device, you move >>>>> from one area to another one covered by annother GGSN, which mean you'll >>>>> have to contact a new P-CSCF, this without invalidating your registration. >>>> In the 3G book from Gonzalo Camarillo, the Service Route only includes >>>> the S-CSCF (no P and no I). >>> Thanks for joining the discussion, Klaus. I think I must have >>> misunderstood RFC 3608 Section 6.1, which I thought says that the >>> Service-Route headers replace the whole route set configured in the UA. >>> >>> So as a confirmation, is it correct to append Service-Route headers >>> into existing route set? >>> >>> -benny >>> >>> >>>> Nevertheless I think Benny is right: without reREGISTRATION after >>>> changing the P-CSCF the client can not receive incoming calls (still >>>> routed to old P-CSCF using the old path). >>>> >>>> klaus >>> >>> _______________________________________________ >>> Visit our blog: http://blog.pjsip.org >>> >>> pjsip mailing list >>> pjsip at lists.pjsip.org >>> http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > > -- Olivier Beytrison Telecommunication Engineer Mobile: +41 (0)78 619 73 53 Mail: olivier at heliosnet.org GPG: 0x4FB83528 http://pgp.mit.edu/
