[SR-Users] Kamailio + Asterisk, what happens when limit for gateway is reached

[Klaus Darilion]

Hi!

Kamailio can count the number of calls per gateway and use the least 
loaded one. Another approach, which is more reliable uses 
failure-routing. This means, the load balancer chooses any of the 
gateways, but if the gateway response with a certain error code, the 
"failure_route" will choose the next gateway and re-sends the request. 
You can do the failure routing multiple times until you ran out of gatways.

regards
Klaus

Am 12.03.2012 10:00, schrieb Sasa Vilic:
> Hello,
>
> I have read here about load balancing between multiple gateways by 
> using carrierroute module, but there is one particular question for 
> which I found no answer.
>
> Let's say I have two asterisk servers (X und Y), that are my gateways 
> to PSTN. Let we do it simple. Let's say that each gateway supports 
> only one outgoing call at the time and there is no incoming calls from 
> PSTN. Now:
>
> Bob calls one number and Kamailio uses X gateway.
> Alice calls other number and Kamailio uses Y gateway.
> Alice terminates the call.
> Alice place a new call, but Bob's call is still in progress.
> If we were used round robin algorithm, Kamailio would then use X 
> gateway, but X gateway is currently occupied. What shell happen now?
> And what if Alice didn't tear down call ordinary? What if it her SIP 
> client simply crashed? (Then kamailio would think that there is now 
> free gateway)
>
> So the main question is: can kamailio know/detect, how much calls are 
> going over one particular gateway and what can be done when limit for 
> this gateway is reached?
>
> Thank you in advance.
>
> Kind Regards,
> Sasa Vilic
>
>
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> sr-users at lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sip-router.org/pipermail/sr-users/attachments/20120312/79e67593/attachment.htm>