[Kamailio-Users] Question regarding TM module DNS failover with SRV records

[Daniel-Constantin Mierla]

On 12/10/09 3:02 PM, Iñaki Baz Castillo wrote:
> El Jueves, 10 de Diciembre de 2009, Daniel-Constantin Mierla escribió:
>    
>> does the 503 reply include a retry-after header?
>>      
> Does Kamailio behaviour depends on that header?

yes, this is what I can tell from sources. Personally, I haven't used it 
so far, therefore I haven't checked the specks.

The new tm, for K 3.0, does not have it.

Cheers,
Daniel

>   If so IMHO it's not correct.
>
> I've joined long discussions in sip-implementors about 503 with/without
> Retry-After header. Some people think that a 503 without this header must be
> considered as a 500. But after discussions this assumption is not correct and
> a 503 must be considered similary even if it doesn't contain this header.
>
> BTW RFC 3263 (Locating SIP Servers) says nothing about 500 error, neither
> about Retry-After header in 503 replies. It considers a 503 with/without
> Retry-After in same way.
>
> IMHO Kamailio/SR should consider Retry-After just as informative but never
> change the routing/failover behavior based on it.
>
> Regards.
>
>    

-- 
Daniel-Constantin Mierla
* http://www.asipto.com/