[asterisk-users] Server redundancy

[Douglas Garstang]

DUNDi doesn't provide good redundancy for phone registrations. Each phone is only registered on a single, primary Asterisk system. In the event that the primary system for a given phone becomes available, the phone will not re-register until it's registraiton expirey period, on it's secondary Asterisk system. During this time, the phone cannot be reached. You can cut the phone registration period right down, to some small period of time, say 5min, but is that acceptible? Also, keep in mind that the lower the registration period, the greater the number of registrations, and therefore the greater the network traffic, and hence, the load on each Asterisk system.
 
Doug.
 

	-----Original Message----- 
	From: RR [mailto:ranjtech at gmail.com] 
	Sent: Mon 7/10/2006 10:09 PM 
	To: Asterisk Users Mailing List - Non-Commercial Discussion 
	Cc: 
	Subject: Re: [asterisk-users] Server redundancy
	
	

	unplug, thanks for pointing that out as well as opposed to or in
	complement with ARA where you can either implement DUNDi between
	clusters of Asterisk servers or have a redundant pair of DUNDi lookup
	servers (just like DNS) somewhere remote to the local asterisk
	servers. DUNDi is a p2p IAX based protocol to allow for looking up
	contact information for a particular registered extension. So in ARA
	you can really store all extension based information in the common
	database for servers that are local to your network i.e. perhaps on
	the same private network or even the same VLAN. Then implement DUNDi
	between asterisk servers that are remote to your location and in their
	own private network using their own database. Not sure the level of
	reliability one can expect using the public internet for DUNDi
	look-ups from a server on the other end of the world but in theory it
	might be do-able. So if you can't find an extension within your local
	database, you perform the DUNDi lookup and find it in your remote
	servers. I'm sure the gurus on the list might have plenty to say on
	this :)
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