[Asterisk-Users] Clustering

[Douglas Garstang]

Hi JR. I'm dying to know... where'd you find your DUNDi documentation? Has something new appeared since I looked at it 2-3 months ago? The O'Reilly book's DUNDi section was impossible to follow, and the examples in the Asterisk DUNDi config files are no better. You do a search online and get almost no results (still wondering when Digium is going to realease some docs for what they call their protocol). I spent a few weeks working on it, tearing my hair out, and gave up. So did my boss.
 
Doug.

	-----Original Message----- 
	From: JR Richardson [mailto:jr.richardson at cox.net] 
	Sent: Fri 3/10/2006 8:55 PM 
	To: ronmccar at gmail.com; asterisk-users at lists.digium.com 
	Cc: jr.richardson at cox.net 
	Subject: re: [Asterisk-Users] Clustering
	
	

	------------------------------
	
	Message: 6
	Date: Fri, 10 Mar 2006 12:22:12 -0700
	From: "Ron McCarthy" <ronmccar at gmail.com>
	Subject: [Asterisk-Users] Clustering
	To: "Asterisk Users Mailing List - Non-Commercial Discussion"
	        <asterisk-users at lists.digium.com>
	Message-ID:
	        <3885f4fe0603101122m6742410ep25276b736072618c at mail.gmail.com>
	Content-Type: text/plain; charset="iso-8859-1"
	
	Hello All,
	
	Ive been doing more and more research on trying to setup a cluster/load
	balancer for Asterisk. All the Asterisk boxes would be using a config that
	is the same between them all (via a DB), but we want one location to point
	the phones to, and from there that machine/device will send it to a Asterisk
	server so the call can be processed. I know you cant balance the whole call,
	ie: once the call is started the RTP stream has to go to the same server,
	but a new call could go to a different server if perhaps the 1st server was
	unreachable.
	
	Has anyone tried this, or got this to work? Ive been looking at using a
	Juniper Session Border Controller, but not sure if thats gonna do the trick,
	and then we also have SER..
	
	Any comments would be great!
	
	Thanks
	Ron
	-------------- next part --------------
	
	
	Ron,
	
	I'm doing something similar with clustering.  I haven't gotten the total design down yet but so far I have 1 * server holding all the routes to several child/registration * servers where my iax and sip clients actually register to.  I'm using the 1 * server running dundi to peer with all the registration servers and all the registration servers only peer with the 1 * server, I call this the Registration Presence Server or RPS.  When a child/registration server does a lookup request to the RPS, the RPS does a lookup on all the other registration servers and knows who is registered where and relays that info back to the original requesting registration server.  Use a dundi ttl=1 in the RPS and ttl=2 in each registration server to avoid routing loops.  I'm still in the testing phase but it's going well, but I’m running into some cache timeout issues when a client drops off and re-registers to a different registration server, have to flush dundi to pickup the new location.  There is a cache timeout parameter I have yet to play with.
	
	I don’t have the load balancing session border controller function down yet, but that is on the list of things to do.
	
	Hope this helps.
	
	JR
	
	JR Richardson
	Engineering for the Masses
	
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