PC Port Connectivity Issue

[dellpe]

I ran into a PC port connectiviity issue that I haven't seen before today. None of the devices connected to the PC port of the 6961 IP phones had mac address entries in the MAC address table of the Cisco 3560 switch. However, the MAC addresses of all of the IP phones were in the 3560's MAC address table and IP connectivity to the phones was never affected. Port security is defined on each switchport connected to an IP phone, but none of the switchports were in err-disable mode. We tried resolve the issue by sending a "reset" command to the phones through call manager, but it had no effect. After trying a few different things, we finally found a shut/no shut or power inline never / power inline auto on the switchports restored connectivity to the devices connected to the phones' PC ports. Also, there wasn't anything in the logs and the logging level is set to debugging.

We were able to isolate the problem to the Cisco IP phone, because the affected devices were connected to the phones PC ports and were on different VLANs and on different physical switches. Devices that were not connected through a IP phone were not affected. Has anyone ever seen this behavior before and were you able to determine what caused the issue? At this point, we have no solid answers. Thanks in advance for any help.

CUCM 8.6.2

Cisco WS-C3560X-24P-S 12.2(50)SE1

Cisco 6961 SCCP69xx.9-2-1-0

Sample port config:

interface FastEthernet0/8
description Register
switchport access vlan 919
switchport mode access
switchport nonegotiate
switchport voice vlan 911
switchport port-security maximum 2
switchport port-security
switchport port-security mac-address sticky
switchport port-security mac-address sticky yyyy.yyyy.yyyy vlan voice
switchport port-security mac-address sticky xxxx.xxxx.xxxx spanning-tree portfast
spanning-tree bpduguard enable
end