[Serusers] DNS SRV problem

[Mark Cerrajetto]

Hello:

I have a SER proxy server, and 2 SIP-to-pstn gateways (GW1, GW2). I would 
like to provide redundancy with SER using DNS SRV entries.

The scenario is: every call must be directed to GW1, and **only** if GW1 
fails, these calls must be directed to GW2.

I've created these dns entries in Bind:

   _sip._udp.my.service.com.  IN  SRV  10  0  5060  gw1.service.com.
   _sip._udp.my.service.com.  IN  SRV  20  0  5060  gw2.service.com.

   gw1.service.com.  IN  A  192.168.1.1
   gw2.service.com.  IN  A  192.168.1.2
   service.com.  IN  A  192.168.1.10


SER receives calls to "user1 at service.com", and after a dns srv lookup it 
sends the call to gw1.service.com correcly. SER configuration is:

   if (uri=~"user1"){
     rewritehost("my.service.com");
     forward(uri:host, uri:port);
     break;
   };

But, if gw1.service.com is down, SER never tries to send the calls to 
gw2.service.com.

SER never send INVITEs to the server with priority 20.

Is it a SER limitation, or is it a configuration problem?

Thank you,
Mark





I would like to provide failover redundancy with SER