Thursday, January 28, 2010

VLAN Trunking Command List

Trunking Command ListThe following table lists important commands for configuring and monitoring trunking on a switch.

Command
Switch(config-if)#switchport mode trunk
Switch(config-if)#switchport trunk encapsulation dot1q 
Switch(config-if)#switchport trunk encapsulation isl
Switch(config-if)#switchport mode dynamic auto
Switch(config-if)#switchport mode dynamic desirable
Switch(config-if)#switchport mode access
Switch#show interface trunk
Switch#show interface fa0/1 trunk
Note: Two switches both configured to use desirable dynamic trunking will not trunk. At least one of the switches must be set to manually trunk or to use auto dynamic trunking.

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