CUCM 8.6.2 Phones not registering 7841 and 8831

Question

Hi all
I am trying to register some new phones - 7841 and 8831.  We installed the COP and Device Pack and rebooted the cluster.  Firmware defaults in the server are sip78xx.10-1-1SR2-1 and sip8831.9-3-3-5. 
These are the first phones of these models that we are trying to use.  All other devices are up and working.  I added the phones manually, auto-reg is disabled.  These new phones are both displaying the same behavior - they booted, but neither device will register.  They are both running the the same firmware version configured as the default in the server.
I have looked at some other discussions but haven't seen any solutions that match up with our issue.   Your input and ideas appreciated, thanks

Answer 1

I'm having this same problem. Over the weekend, I installed the latest device packs and restarted both servers in the cluster. I'm running CUCM 8.6.2 and the phones are 8831.
What's really strange is that the phone is getting incorrect info from the switch port. It's getting a DHCP address from the VLAN2 subnet, when it should be receiving an IP from the VLAN100 subnet.
VLAN2 = Data
VLAN100 = Voice
The original port config:
interface FastEthernet0/25
 description Workstations on VLAN2 - Phones on VLAN 100
 switchport access vlan 2
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 2
 switchport mode trunk
 switchport voice vlan 100
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 spanning-tree portfast
end
I even changed the switch port configuration to this:
interface FastEthernet0/25
 description Workstations on VLAN2 - Phones on VLAN 100
 switchport access vlan 100
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 100
 switchport mode trunk
 switchport voice vlan 100
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 spanning-tree portfast
end
VLAN 2 isn't even in the configuration, but the phone (even after a RESET) is still getting an IP from the DHCP server on VLAN2.
Very strange behavior.
Additional info:
The phone status menu is showing a continuous message of:
TFTP Timeout : SEPXXXXXXXXXXXX.cnf.xm.
No Trust List Installed.
Any suggestions / ideas would be appreciated.