[OpenSIPS-Users] PRACK not using correct dispatcher endpoint Socket IP

Monideth Pen monideth.pen at one-n.co.uk
Wed Jul 7 11:13:55 EST 2021


opensips 2.4.x

I have a specific fail scenario when a call has failed over from a
non-responsive dispatcher endpoint to another healthy endpoint.

The INVITE is relayed correctly to the healthy endpoint, but the PRACK
being relayed back to a 183 from the endpoint is not using the
correct/expected socket IP defined for the healthy dispatcher endpoint.

The PRACK source IP is that of the interface that the original internal
INVITE came in on.

Why would the PRACK use another IP address, instead of the Socket IP
configured for the dispatcher endpoint it has sent the INVITE to?

Thank you.
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