Hi,
We've got a weird problem that seems to only affect 7941 and 7970 phones. We've getting a lot of errors in the logs on the switches:
Feb 20 14:17:34: %SWITCH_QOS_TB-5-TRUST_DEVICE_LOST: cisco-phone no longer detec
ted on port Fa2/0/21, operational port trust state is now untrusted.
Feb 20 14:19:12: %SWITCH_QOS_TB-5-TRUST_DEVICE_LOST: cisco-phone no longer detec
ted on port Fa2/0/23, operational port trust state is now untrusted.
Feb 20 14:26:12: %SWITCH_QOS_TB-5-TRUST_DEVICE_LOST: cisco-phone no longer detec
ted on port Fa2/0/6, operational port trust state is now untrusted.
Feb 20 14:30:10: %SWITCH_QOS_TB-5-TRUST_DEVICE_DETECTED: cisco-phone detected on
port Fa2/0/6, port's configured trust state is now operational.
Feb 20 14:35:32: %SWITCH_QOS_TB-5-TRUST_DEVICE_DETECTED: cisco-phone detected on
port Fa2/0/21, port's configured trust state is now operational.
Feb 20 14:35:55: %SWITCH_QOS_TB-5-TRUST_DEVICE_DETECTED: cisco-phone detected on
port Fa2/0/23, port's configured trust state is now operational.
When you look at the devices that are affected by this, it's only 7941 and 7970 phones. These phones are experiencing "robot" voices and the call quality is terrible.
This was only affecting one particular switch stack (3750's - 5 in a stack mixture of v1 and v2's, all on the latest firmware). This is now affecting another site on another 3750 switch stack (on older firmware). The phones are all on the latest firmware and we've tried rolling back the firmware, but it's still happening.
Struggling to get a support case logged as the individual phones and switches aren't on support, but the CUCM servers are.
Any ideas what might be causing this?
