[Serusers] DNS SRV support ?

[Kostas Marneris]

ok thanks .

Is there any way to combine DNS SRV and t_on_failure() ?
With rewritehost("pstngw.foo.com") SER sends DNS SRV queries, so load balance is Ok.
How I know the first IP that SER sends the INVITE, so I can use the 2nd IP in failure_route[1] block ?

I mean, something like that :
# --- PSTN Handler ---
	...
         if (uri =~ "^sip:XXXXXXXXXXXX@") {
		rewritehost("pstngw.foo.com");
                 t_on_failure("1");
                 route(1);
                 break;
         };
	...

failure_route[1] {
         if ((!t_check_status("487")) && (!t_check_status("486"))) {
                 rewritehostport("pstn2.foo.com:5060");
                 append_branch();
                 route(1);
                 break;
         };
}

Is there any way to determine that SER tried that IP (pstn1-gw or pstn2-gw),
in order to use the other one ?


regards,
Kostas

samuel wrote:
> SER's CVS HEAD version has this fetaure...I guess you would have to
> use t_on_failure and such...
> 
> Samuel
> 
> 2006/9/25, Kostas Marneris <K.Marneris at otenet.gr>:
> 
>> thanks. This works Ok.
>>
>> I have one more question :
>> My DNS SRV config is something like that :
>>
>> $ORIGIN pstngw.foo.com.
>> _sip._udp       SRV 1 1 5060 pstn1.foo.com.
>>                 SRV 1 1 5060 pstn2.foo.com.
>>
>> I can load balance (50-50) with the above.
>>
>> But if one of the GWs is down, then SER keeps on doing "load balancing 
>> 50-50" ,
>> so the ~50% of the calls are routed to GW that is down .
>>
>>
>> Is there a way to have a redundancy setup with DNS SRV only (with 
>> 50-50 load balancing) ?
>> Does this supported by SER's DNS SRV implementation (t_relay() ) ?
>>
>> Or do I have to handle this issue with the t_on_failure() mechanism ?
>>
>>
>> thanx.
>> Kostas
>>
>> Greger V. Teigre wrote:
>> > Use rewritehost("pstngw.foo.com");
>> > (If port is specified, DNS SRV is not used, ref. the RFC)
>> > g-)
>> >
>> > Kostas Marneris wrote:
>> >
>> >> Hello,
>> >>
>> >> I run ser.0.9.6 and I can use
>> >> either
>> >>     rewritehostport("1.2.3.4:5060");
>> >> or
>> >>     rewritehostport("pstngw.foo.com:5060");
>> >>
>> >> with t_relay() command on INVITE/PSTN handler in order
>> >> to route calls to a Cisco PSTN GW.
>> >> This works fine.
>> >>
>> >>
>> >> Is "DNS SRV queries" supported on ser.0.9.6 and is there a specific
>> >> conf ?
>> >>
>> >>
>> >> thanx
>> >> Kostas
>> >> _______________________________________________