[OpenSIPS-Users] dns srv question

[Bogdan-Andrei Iancu]

Hello,

OpenSIPS will automatically try NAPTR/SRV (of course, depending on the 
URI form - like port must be unknown in order to go for SRV lookup).

If I got it right, your hackish DNS configuration may work - using the 
same name for the SRV and for the A record - it should not be any 
conflict at all - phones with SRV capabilities will go via SRV, the ones 
without will do A lookup (in both cases on the same domain name).

Regards,

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com

On 11.02.2014 16:26, Miha wrote:
> Hi,
>
> opensips in my case does not use dns srv domin. I am using dns srv 
> domain just for UAC's, for geo redundancy. As some phones does not 
> support dns srv (small amount) it is easier (for me) to use the same 
> domain for registration's. I have tftp server for all configration and 
> it is easy and nicers that registrar in all config is the same. That 
> is why I would like to define same A record as is dns srv domain.
>
> So, I will have two A record and if I understand you right, Opensips 
> will sometimes bind to one and sometimes to another record? Could be 
> this causing any problems?
>
> tnx
> miha
>
> Dne 2/11/2014 2:53 PM, piše Olle E. Johansson:
>> On 11 Feb 2014, at 14:47, Miha <miha at softnet.si> wrote:
>>
>>> Hi
>>>
>>> Now I have one DNS SRV domain (sip.domain.com) which points to two A 
>>> record inputs with different weight (sip1.sss.domain.com and 
>>> sip2.sss.domain.com).
>>>
>>> If I add for sip.domain.com  A record which  will pont to the same 
>>> IP as sip1.sss.domain.com, could this be causing any problems for 
>>> opensips (there will be two A record two the same IP, one with the 
>>> same name as dns srv record)?
>> If you have configured your proxy to look up SRV records, those A 
>> records for "sip.domain.com" will not be asked for when doing SRV 
>> lookups.
>>
>> If your proxy is not configured for doing SRV lookups, then it will 
>> find the A records and use them. Debugging will be hard.
>>
>> I would start with adding SRV records in DNS, test everything. When I 
>> have confirmed that it works with software that implements SRV 
>> properly, I would add the A records for the same domain.
>>
>> /O
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>>
>
>
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