VLAN Commands 4

switchport dot1q-tunnel tpid

This command sets the Tag Protocol Identifier (TPID) value of a tunnel port. Use the no form to restore the default setting.

Syntax

switchport dot1q-tunnel tpid tpid no switchport dot1q-tunnel tpid

tpid – Sets the ethertype value for 802.1Q encapsulation. This identifier is used to select a nonstandard 2-byte ethertype to identify 802.1Q tagged frames. The standard ethertype value is 0x8100. (Range: 0800-FFFF hexadecimal)

Default Setting

0x8100

Command Mode

Interface Configuration (Ethernet, Port Channel)

Command Usage

Use the switchport dot1q-tunnel tpid command to set a custom 802.1Q ethertype value on the selected interface. This feature allows the switch to interoperate with third-party switches that do not use the standard 0x8100 ethertype to identify 802.1Q-tagged frames. For example, 0x1234 is set as the custom 802.1Q ethertype on a trunk port, incoming frames containing that ethertype are assigned to the VLAN contained in the tag following the ethertype field, as they would be with a standard 802.1Q trunk. Frames arriving on the port containing any other ethertype are looked upon as untagged frames, and assigned to the native VLAN of that port.

All ports on the switch will be set to the same ethertype.

Example

Console(config)#interface ethernet 1/1

Console(config-if)#switchport dot1q-tunnel tpid 9100

Console(config-if)#

Related Commands

show interfaces switchport (4-175)

show dot1q-tunnel

This command displays information about QinQ tunnel ports.

Command Mode

Privileged Exec

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Accton Technology ES3528M-SFP manual Switchport dot1q-tunnel tpid, Show dot1q-tunnel, 0x8100