Switchport Trunk Native Vlan Command on CISCO Router/Switch

Command

Switchport Trunk Native Vlan

Use

Changes the native VLAN for dot1q encapsulation.

Syntax

Switch(config-if)#switchport trunk native vlan <vlan #>

Example

In this example, the native VLAN for int fa0/2 is changed.

SW#conf t
SW#int fa0/2
SW3(config-if)#switchport trunk native vlan 55

Here’s the trunking information for SW3.

SW3(config-if)#do show int trunkPort Mode Encapsulation Status Native vlan
Fa0/19 auto 802.1q trunking 55
Fa0/20 auto n-802.1q trunking 1
Fa0/21 auto n-802.1q trunking 1
Fa0/22 auto n-802.1q trunking 1
Port Vlans allowed on trunk
Fa0/19 1-4094
Fa0/20 1-4094
Fa0/21 1-4094
Fa0/22 1-4094

Port Vlans allowed and active in management domain
Fa0/19 1,10-20,55,99,555
Fa0/20 1,10-20,55,99,555
Fa0/21 1,10-20,55,99,555
Fa0/22 1,10-20,55,99,555

Port Vlans in spanning tree forwarding state and not pruned
Fa0/19 10-11
Fa0/20 none
Fa0/21 1

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