20 
Command Mode 
Interface Configuration Mode (interface fastEthernet / interface range 
fastEthernet / interface gigabitEthernet / interface range gigabitEthernet) 
Example 
Configure the Fast Ethernet port 3 to operate in the auto voice VLAN mode: 
TL-SL2428(config)#interface fastEthernet 1/0/3 
TL-SL2428(config-if)#switchport voice vlan mode auto 
switchport voice vlan security 
Description 
The  switchport voice vlan security command is used to enable the Voice 
VLAN security feature. To disable the Voice VLAN security feature, please use 
no switchport voice vlan security command. 
Syntax 
switchport voice vlan security   
no switchport voice vlan security 
Command Mode 
Interface Configuration Mode (interface fastEthernet / interface range 
fastEthernet / interface gigabitEthernet / interface range gigabitEthernet) 
Example 
Enable the Fast Ethernet port 3 for Voice VLAN security feature: 
TL-SL2428(config)#interface fastEthernet 1/0/3  
TL-SL2428(config-if)#switchport voice vlan security   
show voice vlan   
Description 
The  show voice vlan command is used to display the global configuration 
information of Voice VLAN.   
Syntax 
show voice vlan