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

[Lelio Fulgenzi]

I've used similar instructions for the 7910s and 7912s. The menu options might be different, but the goal is to set an alternate TFTP server pointing to the other cluster.

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Lelio Fulgenzi, B.A.
Network Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
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"I had a coffee and Coke at lunch today...and now, I've got more jitter than an
IP phone on a long haul 10base2 connection"                                           LFJ
  ----- Original Message ----- 
  From: Paul Yago 
  To: Ryan Ratliff 
  Cc: cisco-voip at puck.nether.net 
  Sent: Wednesday, August 10, 2005 3:24 PM
  Subject: RE: [cisco-voip] Registering a hardphone to a different CCM cluster


  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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