Hi Experts, We have one Publisher and one subscriber -Our phones are registered with Subscriber. CM Group has subscriber as the first CM and publisher as the second. During failover (I unplugged the subscriber) found that half the phones couldn't failover to publisher but other half did.
I created a another CM group (Publisher First & Subscriber second) and new device pool. Assigned new configuration to my phone only but phone can't register with publisher. I believe it tries it cos it show CM1 is publisher but it shows active CM is subscriber which is CM2.
I have checked the access-list between phone & Call Managers.
It can be the network problem, which stopping half phone to register with Publisher. Also make sure that under system tab Publisher is registered with IP address not with System name. I suggest have a look at other url also in enterprise parameters.
Hope it help.
Sounds like replication is working.
Here is another test you can do.
Make sure you reset the device pool after you add in the pub/sub to the CM group you just created. The phone should be restarted then (rebooted).
You also try and put the phone in a device pool with only the Pub or only the Sub. This will ensure that both CUCM servers are infact working correctly.
One more option, I have had issues with 7975 phone firmware.. Id imagine the 7965s are also the same... but cant confirm. Possibly downgrade the firmware and try again