Configuration prerequisites
Before you configure this feature, complete the following tasks:
Enable 802.1X on the port.
Set the port type to hybrid or trunk, because the port is assigned to the 802.1X voice VLAN as a tagged member. For information about port types, see Layer 2—LAN Switching Configuration Guide.
Configure LLDP or CDP compatibility on the device. For information about the LLDP and CDP compatibility features, see Layer 2—LAN Switching Configuration Guide.