Users Guide

Layer 2 Switching Commands 858
Command Mode
Global Configuration mode
User Guidelines
This command has no user guidelines.
Example
The following example displays how to add all physical interfaces to the
protocol-based group identified by group ID “2.”
console(config)#protocol vlan group all 2
show dot1q-tunnel
Use the show dot1q-tunnel command to display the QinQ status for each
interface.
Syntax
show dot1q-tunnel [ interface interface-id ]
Default Configuration
If no interfaces are specified, information is shown for all interfaces.
Command Mode
Privileged Exec mode and all show modes
User Guidelines
Up to three additional TPIDs can be configured. The 802.1Q tag is pre-
defined in the system and cannot be removed.
It is not possible to configure an inner TPID value other than 0x8100.
The primary TPID is shown in the EtherType column. The primary TPID is
placed in the outer tag for traffic egressing the interface. The interface will
process incoming traffic as double tagged if any of the configured TPIDs is
present in the frames outer VLAN tag. Traffic with a TPID other than the
configured TPID is processed normally, i.e. as if it is not double tagged.