Voice over IP Cisco - Graceful Failover between CallManagers.

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Author Graceful Failover between CallManagers.
Scott O'Donnell

2006-05-19, 1:11 pm

Can someone confirm my thinking on this.

I have a Publisher /Subscriber setup with the phones registered to the
Subscriber.

I had thought that if the subscriber goes off line, the phones will
reboot and re-register with the publisher
but if I shutdown the callmanager process on the subscriber the phones
will re-home to the publisher without a phone reboot.

Any thoughts?

Scott


Ryan Ratliff

2006-05-19, 1:11 pm

The phones are simply reregistering not rebooting. It should be a
very quick process.

-Ryan

On May 19, 2006, at 10:43 AM, Scott O'Donnell wrote:

Can someone confirm my thinking on this.

I have a Publisher /Subscriber setup with the phones registered to
the Subscriber.

I had thought that if the subscriber goes off line, the phones will
reboot and re-register with the publisher
but if I shutdown the callmanager process on the subscriber the
phones will re-home to the publisher without a phone reboot.

Any thoughts?

Scott

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Lelio Fulgenzi

2006-05-19, 1:11 pm

There is no reboot required. I think if the phone itself is already connected to the backup callmanager as standy the failover is relatively quick. A quick screen refresh happens if I'm not mistaken. If it is the third CallManager that it is failing over to, it might take a little longer.

If there is an actve call, the whole process waits until that call is over.


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Network Analyst (CCS) * university of Guelph * Guelph, Ontario N1G 2W1
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----- Original Message -----
From: Scott O'Donnell
To: cisco-voip@puck.nether.net
Sent: Friday, May 19, 2006 10:43 AM
Subject: [cisco-voip] Graceful Failover between CallManagers.


Can someone confirm my thinking on this.

I have a Publisher /Subscriber setup with the phones registered to the Subscriber.

I had thought that if the subscriber goes off line, the phones will reboot and re-register with the publisher
but if I shutdown the callmanager process on the subscriber the phones will re-home to the publisher without a phone reboot.

Any thoughts?

Scott



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