On Tue, 2006-10-10 at 11:33 +0530, Suganthi Chinnappan - TLS, Chennai wrote: > Hi All, > > I have some doubts related to SIP multicasting. > > 1. Is it possible to run multiple registrars with different domain names > (say D1 & D2) in a network? > > > 2. Assuming (1) is possible and an UA that belongs to D1 sends multicast > REGISTER request to login. What will be the response of D2 on receiving > multicast REGISTER? I think D2 should not reply because, if the response > from D2 reaches first at UA, login will be failed since UA will take the > first response according to RFC 3261 Section 17.1.3 > > > "If a request is sent via multicast, it is possible that it will generate > multiple responses from different servers. These responses will all have > the same branch parameter in the topmost Via, but vary in the To tag. The > first response received, based on the rules above, will be used, and > others will be viewed as retransmissions. That is not an error; multicast > SIP provides only a rudimentary "single-hop-discovery-like" service that is > limited to processing a single response." > > > Can anyone clarify this please?
I think a good summary would be 'use of multicast for SIP REGISTER is a bad idea'. -- Scott Lawrence tel:+1-781-938-5306;ext=162 or sip:[EMAIL PROTECTED] sipXpbx project coordinator - SIPfoundry http://www.sipfoundry.org/sipX Chief Architect - Pingtel Corp. http://www.pingtel.com/ _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
