[asterisk-users] SER Dispatcher Load Balance How-To?

[Adam Linford]

SER/OpenSER can get around call forwarding/transfer problems.  You just need
to account for those SIP dialogue's that can be problematic, and bypass
using the dispatcher module for those situations.  

One thing to remember is to replicate usr-loc info that is cached in memory,
otherwise load-balancing for INVITE's will fail if passed to a proxy that
did not receive the REGISTER request for sending party.  The standard
t_replicate() function only supports replication between two SER/OpenSER
proxies, so if you are looking to add in any more, you will need a more
manual approach.  OpenSER 1.1.0 actually offers the ability to operate
completely out of a database, even for usr-loc, which could work for you.

Other approaches for load balancing include DNS round-robin techniques, and
separate software or hardware appliances dedicated to load distribution.  I
have successfully worked with Foundry ServerIron's, and Vovida's Open Source
load-balancing proxy, in the past.

Cheers,
Adam

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Douglas
Garstang
Sent: 30 August 2006 04:05
To: Asterisk Users Mailing List - Non-Commercial Discussion;
asterisk-users at lists.digium.com
Subject: RE: [asterisk-users] SER Dispatcher Load Balance How-To?

That might not be a good idea. If you transfer or forward calls on your
phones, you MUST make sure the transferred or forwarded call goes back to
the same Asterisk box it was handled on. If you use the dispatcher, and load
balance, there is no guarantee of that, and transfers and forwarding will
break.
 
Doug.

	-----Original Message----- 
	From: Andy Chung (Power-All) [mailto:andychung at powerallnetworks.com]

	Sent: Tue 8/29/2006 7:49 PM 
	To: asterisk-users at lists.digium.com 
	Cc: 
	Subject: [asterisk-users] SER Dispatcher Load Balance How-To?
	
	

	Hi all,
	
	I have three Asterisk servers behind a SER. I want to know how to
	configure the Dispatcher module of SER to achieve load balance for
the
	Asterisk servers. I have visited
	http://www.openser.org/docs/modules/1.1.x/dispatcher.html, is there
any
	web sites have more detail information on that?
	
	Thanks!
	Andy
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