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Hello,<br>
<br>
On 3/12/12 10:11 AM, Klaus Darilion wrote:
<blockquote cite="mid:4F5DBDD5.7000509@pernau.at" type="cite">
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Hi!<br>
<br>
Kamailio can count the number of calls per gateway and use the
least loaded one.</blockquote>
<br>
not sure this is out of the box with carrier route module, but
dispatcher module has call load balancing. Another option to track
active calls per destination is using dialog module and profiles.<br>
<br>
However, I would go with round robin and the failure route solution
as pointed by Klaus, it is more flexible and lightweight.<br>
<br>
Cheers,<br>
Daniel<br>
<br>
<blockquote cite="mid:4F5DBDD5.7000509@pernau.at" type="cite">
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.<br>
<br>
regards<br>
Klaus<br>
<br>
Am 12.03.2012 10:00, schrieb Sasa Vilic:
<blockquote cite="mid:4F5DBB45.1090807@gmail.com" type="cite">
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<div class="moz-text-flowed" style="font-family: -moz-fixed;
font-size: 14px;" lang="x-western">Hello, <br>
<br>
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. <br>
<br>
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: <br>
<br>
Bob calls one number and Kamailio uses X gateway. <br>
Alice calls other number and Kamailio uses Y gateway. <br>
Alice terminates the call. <br>
Alice place a new call, but Bob's call is still in progress. <br>
If we were used round robin algorithm, Kamailio would then use
X gateway, but X gateway is currently occupied. What shell
happen now? <br>
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) <br>
<br>
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? <br>
<br>
Thank you in advance. <br>
<br>
Kind Regards, <br>
Sasa Vilic <br>
</div>
<br>
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<br>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla
Kamailio Advanced Training, April 23-26, 2012, Berlin, Germany
<a class="moz-txt-link-freetext" href="http://www.asipto.com/index.php/kamailio-advanced-training/">http://www.asipto.com/index.php/kamailio-advanced-training/</a></pre>
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