+ When a voice VLAN is configured on a secure port that is also configured as a sticky secure port, all addresses seen on the voice VLAN are learned as dynamic secure addresses, and all addresses seen on the access VLAN (to which the port belongs) are learned as sticky secure addresses. + If any type of port security is enabled on the access VLAN, dynamic port security is automatically enabled on the voice VLAN. + When you enable port security on an interface that is also configured with a voice VLAN, you must set the maximum allowed secure addresses on the port to at least two. + You cannot configure static secure or sticky secure MAC addresses on a voice VLAN. + A secure port cannot belong to a Fast EtherChannel or Gigabit EtherChannel port group. + A secure port cannot be a destination port for Switched Port Analyzer (SPAN). + A secure port cannot be a dynamic access port.

+ Port security can only be configured on static access ports, trunk ports, or 802.1Q tunnel ports. Follow these guidelines when configuring port security:

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