Installation manual

4-253
SIGNAMAX LLC • www.signamax.eu
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
Related Commands
show interfaces switchport (4-197)
show dot1q-tunnel
This command displays information about QinQ tunnel ports.
Command Mode
Privileged Exec
Console(config)#interface ethernet 1/1
Console(config-if)#switchport dot1q-tunnel tpid 9100
Console(config-if)#