For some reason, all the IP phones on one of our sites rebooted today. It was a short outage (but disruptive). The same thing has happened last week so I'm trying to find the root cause.
On 3300 ICP rel 6.0 system, the logs show:
CompleteFsmRequest: MID:987232a2 CID: 7efba70 PCC[ 0x7EFBA70 ]:Tx[ TDM, PortId:21, CompId:16, DN: ] Rx[ IP_PHONE, PortId=1116, CompId=1, DN:47004 ] completed in [ 10010 ] msec in state [ RX_CLOSED ] with a failure [ FSM_RX_CLOSE_TIMEDOUT ]
Module Main
File Name and Line Number IPSwSP_fsm.cpp;5266
Then:
ICP has lost contact with ( (08-00-0F-7B-2C-74)), network driver cluster pool free: 6127 and low water mark: 3896
Module Main
And went on with the IP/XNET trunks dropping, then the IP phones re registering back to the primary controller.
Now if it was failure with the primary controller, I would have expected the phone to failover to the secondary controller.
Our phones are on a different VLAN than the ICPs. The Cisco router and the switches do not have logs/error that can indicate a reason of the reboot. No network changes were done that could have caused this either.
Has anyone seen this before? Any thoughts? Thanks for all your input.