[OpenSIPS-Users] t_replicate and dispatcher module to forward REGISTER messages

[Bogdan-Andrei Iancu]

Hi Jonathan,

Unfortunately this is a design problem - the t_replicate() is actually a 
t_reply() but without passing the received replies back to the caller. 
So t_replicate() behaves on parallel forking exactly as t_reply().

Some additional work may be required to change this and have 
t_replicate() properly replicating to all destination. Could you please 
open a ticket on github about this ?

Thanks and Regards,

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

On 03.08.2016 19:15, Jonathan Hunter wrote:
> Hi Guys,
>
> We have an old platform we are looking to redesign but in the meantime 
> we need to fix a problem we have.
>
> Currently we have an opensips proxy/registrar with 2 x Asterisk boxes 
> behind it.
>
> Now currently we use t_replicate and the dispatcher module 
> (ds_next_domain()) to send REGISTER requests in parallel to both 
> Asterisk Servers so they can update their sip peers.
>
> This works great but we sometimes (an issue we are investigating) dont 
> always get a 200ok response back from one or both Asterisk servers for 
> the REGISTER message.
>
> Therefore I am looking to resend the REGISTER whenever this may happen.
>
> This is fine using the fr timers should both Asterisk Servers not 
> respond, however if only 1 Server doesnt respond, and the other does, 
> this problem is lost, due to the parallel forking being applied to the 
> t_replicate scenario.
>
> I can capture 200 ok messages in onreply routes to confirm which 
> Asterisk servers have responded, however I cannot t_relay again from 
> this type of route.
>
> Is there another way to do this? Whereby I can remain transaction 
> stateful, and resend a REGISTER message if only one of the Asterisk 
> Servers doesnt respond to a REGISTER message?
>
> Thanks
>
> Jon
>
>
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