Command Line Interface
4-178
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
Related Commands
show interfaces switchport (4-125)
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)#
Summary of Contents for 8126L2
Page 2: ......
Page 18: ...Contents xiv ...
Page 22: ...Tables xviii ...
Page 26: ...Figures xxii ...
Page 44: ...Initial Configuration 2 10 2 ...
Page 108: ...Configuring the Switch 3 64 3 Figure 3 41 802 1X Port Configuration ...
Page 488: ...Software Specifications A 4 A ...
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