[Serusers] DNS SRV support ?

[Klaus Darilion]

Kostas Marneris wrote:
> 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 ?

In ser CVS there was DNS cache and SRV failover support added recently. 
It will do the failover automatically.
regards
klaus

> 
> 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
>>> >> _______________________________________________
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