have multiple CP7911s flapping between the data ahd voice vlan both when idle and during a call.
-Port Config Looks Like-
switchport access vlan 4
switchport voice vlan 512
Have upgraded and downgraded switch firmware. Have upgraded and downgraded phone firmware.
Phone log shows the following.
NOT 08:47:24.959415 CDP-D: vvlan changed --> New:4096 old:512 4096
NOT 08:47:24.964826 CDP-D: vlan Configured --> New:4096 old:4 :4096
NOT 08:47:25.008963 CDP-D: vvlan changed --> New:512 old:4096 512
NOT 08:47:25.014483 CDP-D: vlan Configured --> New:4 old:4096 :4
NOT 09:01:24.959628 CDP-D: vvlan changed --> New:4096 old:512 4096
NOT 09:01:24.965456 CDP-D: vlan Configured --> New:4096 old:4 :4096
Anyone have any ideas what may be causing this.