[OpenSER-Users] Forwarding to SRV records not working

[James Holden]

Hi,

I'm having problems with OpenSER forwarding calls to a domain where
there are only SRV records.

OpenSER seems not to perform any balancing or failover when a target
server is unavailable or gives an error.

I wish to forward calls to a number of onward gateways that at times may
not respond at all, or may respond with something like "503 Service
Unavailable".

The actual destination address is derived from an enum lookup, but it
may be for example 123456 at example.com

There are SRV records as follows:

_sip._udp.example.com. 600 IN    SRV  10 50 5060 gw1.example.com.
_sip._udp.example.com. 600 IN    SRV  10 50 5060 gw2.example.com.

The behaviour I'd expect/like would be that OpenSER will distribute the
calls between the two targets specified in the SRV records, and will
fail over to the other target if one fails to respond or gives a fatal
error such as a 503.

What actually happens, is that the calls all go to the first one
regardless.

Are my expectations reasonable?

Does OpenSER's SRV record implementation work like this or am I misled?

Kind regards,

James