Strange one, I wondered if people had encountered it. We havent until recently and its random affects random users?
We have switchports set up with seperate voice and data vlans and a max of 3 macs
switchport access vlan 71
switchport mode access
switchport nonegotiate
switchport voice vlan 553
switchport port-security maximum 3
switchport port-security
auto qos voip cisco-phone
spanning-tree portfast
Users complain they are disconnected and the phone is trying to register. When you check the switchport the phone MAC is stuck in the native untagged vlan 1. Clearing MAC and port security does not work, Removing the voice vlan and adding it back does not work, however Increasing the Mac address Max command to 4 allows it to start using the Voice Vlan again and register.
Has anyone experienced this before? I guess I need span the port when it occurs again and pick apart a capture!
