Cisco WS-C3560E-48PD-SF Command Reference - Page 717
vlan dot1q tag native
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Chapter 2 Catalyst 3560 Switch Cisco IOS Commands vlan dot1q tag native vlan dot1q tag native Use the vlan dot1q tag native global configuration command 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. vlan dot1q tag native no vlan dot1q tag native Syntax Description This command has no arguments or keywords. Defaults The IEEE 802.1Q native VLAN tagging is disabled. Command Modes Global configuration Command History Release 12.2(25)EA1 Modification This command was introduced. 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. Examples 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. 78-16405-05 Catalyst 3560 Switch Command Reference 2-685