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I would just like to verify my understanding regarding ‘Backup Routes’ with SIP.
Suppose one UA has 2 routes, one primary to PROXY1, and one secondary to PROXY2.
Suppose PROXY1 is down. When the UA sets up a session, it will Send INVITE to Proxy 1 Timeout Eventually send INVITE to Proxy 2, and setup the session.
Suppose now Proxy 1 and 2 are UP. UA send INVITE to Proxy 1 Proxy sends trying and sets up session. Proxy 1 dies. UA sends BYE to Proxy 1, though does not receive any response.
Shouldn’t at this point the UA try to send the BYE to the Proxy 2 as well?
E.g. I think that each INVITE, BYE and CANCEL transaction shall be treated separately from a routing perspective.
Am I thinking right? Regards, //Thomas.
Thomas Vasen B2 Bredband AB
E-mail: thomas.vasen@bredband.com
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