[cisco-voip] Registering a hardphone to a different CCM cluster

[Paul Yago]

These suggestions (Alternate TFTP, DHCP enabled, TFTP setting) work fine on the 7940s and IPCommunicators. However the 7905s and the 7912s are still staying with the original CCM. 

Unfortunately, we also have 7902s which are useless because we can't even change the TFTP settings, and register with the right CCM.

-Paul




-----Original Message-----
From: Ryan Ratliff [mailto:rratliff at cisco.com] 
Sent: Wednesday, August 10, 2005 10:59 AM
To: Paul Yago
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Registering a hardphone to a different CCM cluster

Since the TFTP server tells the phone what CM to register with the only 
way to force your phone to register to another CM cluster would be to 
change the TFTP settings.

That said you do not need to disable DHCP to achieve this.  Simply set 
"Alternate TFTP" to True, then manually enter in the TFTP server IP 
address.

-Ryan
On Aug 10, 2005, at 1:49 PM, Paul Yago wrote:

Hello,
 
Does anyone know the secret to forcing a phone to register to another 
CCM cluster on the same subnet?
 
We have one CCM cluster, running TFTP on both CCMs, to which our DHCP 
server points new phones (via the 150 option). Sometimes I would like 
to switch a hardphone (i.e. 7905) from this cluster to another separate 
cluster.
 
To do so, on the phone I disable DHCP and change the TFTP Server 1 
value to the other CCM. And when I validate, it restarts the phone and 
50% of the time, the phone registers with the other CCM. 50% of the 
time it stays with the original CCM, regardless of the new settings. In 
such a case, the network settings on the phone still have the correct 
TFTP and DHCP settings, but the Call Manager settings are still set to 
the original CCM.
 
I would like to find a way to force my phone to register with the new 
CCM. Is there a way other than changing the TFTP settings? By the way, 
I've tried turning off the TFTP service of the original CCM, which 
works. However I don't always have access to that CCM.
 
 
Thanks,
Paul
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