Even if you have a single outbound proxy setting, you should still do a DNS lookup for the outbound proxy and you may get more than one proxy address from the DNS. (This assumes the outbound proxy setting had a DNS name and not an IP address.) You should try all the proxy addresses until you reach one of them successfully. That way, you get not just load balancing, but also redundancy for improved availability.
The relevant RFC is RFC 3263. You might also want to follow discussion of draft-ietf-sip-outbound-04, which is currently being discussed in the SIP working group. (Keep in mind that a draft is not a standard and may never be one.) -- DS SungWoo Lee wrote: >Dear, > >I guess I have seen something like SIP Proxy Load balancing and wondering this >is well-used >or recently-demanded functionality in the industry. Currently my SIP stack >allows a single >outbound proxy setting at a moment as stated in RFC3261. However, Proxy Load >balancing came from >an idea of letting one UAC have multiple SIP Proxies for Load balancing >purpose. > > >Does any of SIP implementors here know or experience this kinda Proxy Load >balancing? If so, >could you let me know where I can get any related reference document for it? >(RFCs or whatever) > >Thanks always. > >Sean > >_______________________________________________ >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
