Question about common way to setup 1140E IP phone 1

[chippowell]

Two CS1K’s, two sites: one “system.” Primary call server and backup call server. Geo-redundancy. Database is backed up to backup site during midnight routines and to removable media each night. Question about setting up IP phones.

Vendor recommended setting up 1140E IP phones like this: Server 1 (S1) is the backup site. Server 2 (S2) is the primary site. They say this is the best case scenario if the primary site fails and the backup needs to take over.

How bad would it be to reverse this? I.e., set up the primary call server as S1, and the backup call server as S2. During a failure at the primary call server, would the IP phone automatically reboot and then find S2 as the active server? Or would the IP phone just fail, and a manual reboot would be required?

Is this the common way to set up IP phones that can look to multiple call servers?

Thanks as always!

 

[KCFLHRC]

The way it is supposed to be set up is through NCS, Network Connect Service through NRS. And your S1 address is the Geo Site Node IP and through NCS that Node redirects the IP phones to the main site Node IP. Then your S2 address is the the primary site Node. Look in this document starting on page 79 NN43001-507_05.02_System_Redundancy_Fundamentals.pdf

 

[Tman45]

KCF is correct. We have it set up this way and is the 'best practice' so to speak. The thought behind it is if the primary site fails then you want the phone to register right away to it's local site versus waiting for several retries to fail on S1 and register to S2 (if you set the local/remote for S2 like you are asking). So always set S1 on remote phones to that remote Node IP and redirect to main site via NRS/NCS. Always set S2 for the main site on remote phones.

For example:
Main Site =
S1 10.1.1.100
S2 10.3.1.100

Remote Site =
S1 10.3.1.100
S2 10.1.1.100

 

[Tman45]

Also it is 'best practice' to use Relaxed Node config so if your node is 1000 for Main Site and 1001 for Remote Site you use 100 as your Node ID as it can register to both sites.