Vlan Dot1Q Tag Native - Cisco Catalyst 3750-X Command Reference Manual

Cisco ios release 15.2(1)e and later

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vlan dot1q tag native

Use the vlan dot1q tag native global configuration command on the switch stack or on a standalone

switch to enable tagging of native VLAN frames on all IEEE 802.1Q trunk ports. Use the no form of this

command to return to the default setting.

This command is not supported on switches running the LAN base feature set.

Syntax Description

This command has no arguments or keywords.

The IEEE 802.1Q native VLAN tagging is disabled.

Command Modes

Global configuration

Command History

Usage Guidelines

When enabled, native VLAN packets going out all IEEE 802.1Q trunk ports are tagged.

When disabled, native VLAN packets going out all IEEE 802.1Q trunk ports are not tagged.

You can use this command with the IEEE 802.1Q tunneling feature. This feature operates on an edge

switch of a service-provider network and expands VLAN space by using a VLAN-in-VLAN hierarchy

and tagging the tagged packets. You must use IEEE 802.1Q trunk ports for sending packets to the

service-provider network. However, packets going through the core of the service-provider network

might also be carried on IEEE 802.1Q trunks. If the native VLANs of an IEEE 802.1Q trunks match the

native VLAN of a tunneling port on the same switch, traffic on the native VLAN is not tagged on the

sending trunk port. This command ensures that native VLAN packets on all IEEE 802.1Q trunk ports are

tagged. For more information about IEEE 802.1Q tunneling, see the software configuration guide for

this release.

This example shows how to enable IEEE 802.1Q tagging on native VLAN frames:

Switch# configure terminal

Switch (config)# vlan dot1q tag native

Switch (config)# end

You can verify your settings by entering the show vlan dot1q tag native privileged EXEC command.

Catalyst 3750-X and 3560-X Switch Command Reference

vlan dot1q tag native

no vlan dot1q tag native

Modification

This command was introduced.

Chapter 2 Catalyst 3750-X and 3560-X Switch Cisco IOS Commands

Catalyst 3560-x