[OpenSIPS-Users] Question on dispatcher module

[Vlad Paiu]

Hello,

Here is a nice tutorial about how to do load-balacing between several 
gateways :
     http://www.opensips.org/Resources/DocsTutLoadbalancing

You can force sequential requests to take the same path as the original 
INVITE message by using the Record-Route mechanism. So basically you 
will load-balance just the initial requests ( INVITE ), and let the 
sequential requests within the dialog follow the same path.

Regards,

Vlad Paiu
OpenSIPS Developer


On 09/28/2011 08:11 PM, Alejandro Recarey wrote:
> Hello all,
>
> I was reading the documentation on the dispatcher module and it says:
>
> "Is dispatcher dialog stateful?
>
> No. Dispatcher is stateless, although some distribution algorithms are
> designed to select same destination for subsequent requests of the
> same dialog (e.g., hashing the call-id)."
>
> I am trying to load balance calls between different asterisk gateways,
> and I think the round-robin algorithm would be ideal (I would like the
> option of having a weighted round robin, but that is beside the
> point). I don't understand the use of the dispatcher module if, for
> example, the CANCEL request from the originating caller is sent to a
> different asterisk box than the one that had the INVITE request. As
> far as I can read into the module, there is no guarantee that the
> requests in the same dialog will go to the same box.
>
> How can I setup the dispatcher to load balance between asterisk gateways?
>
> Regards,
>
> Alex
>
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