Re: Comment on DERIVE and B2BUAs
"Iñaki Baz Castillo" <[email protected]>
| Newsgroups | gmane.ietf.sip |
|---|---|
| Message-ID | <[email protected]> |
2008/10/28 Elwell, John <[email protected]>: > Viktor, > > An interesting draft addressing a known problem space. Dan Wing has already pointed out similarities with draft-wing-sip-e164-rrc (now expired). I fear the present draft will not work in the presence of B2BUAs along the path of the INVITE request, since these tend to change things like call-ID, to-tag and from-tag. Since B2BUAs, and SBCs in particular, are the main reasons why RFC 4474 will not work, any solution has to be able to work through these devices. Since the B2BUA has detailed info of both legs A and B, it is capable of doing needed changes, as replacing call-id and to-tag in Event header. Also, the B2BUA could handle the SUBSCRIBE by its own, this is, becoming a dialog presence server instead of forwarding the SUBSCRIBE to the UA. B2BUA must handle all this stuff since they are, in fact, the end point, not the UA's behind them. -- Iñaki Baz Castillo <[email protected]> _______________________________________________ Sip mailing list https://www.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [email protected] for questions on current sip Use [email protected] for new developments on the application of sip