CLI Guide

Layer 2 Switching Commands 881
• vman—Define the Ethertype as 0x88A8.
• custom—Define the Ethertype as a 16 bit user defined value (in decimal).
Default Configuration
802.1Q is the default Ethertype for both inner and outer VLAN TPIDs. The
802.1Q TPID cannot be removed from the configuration.
By default QinQ processing of frames is disabled.
Command Mode
Global Configuration
User Guidelines
This command globally defines additional TPIDs for use by the system for
matching of ingress packets in the outer tag. The switch uses the default
primary TPID 0x8100 and any of the additional TPIDs to match packets in
the outer tag on ingress. A TPID must be configured globally before it can be
applied to an interface. Up to three additional TPIDs can be configured for
acceptance in the outer VLAN tag on the SP port. Packets received on the SP
port which do not contain one of the configured TPIDs or which do not
contain the SP VLAN ID in the outermost VLAN tag are processed by the
port as if they are not part of the QinQ tunnel.
Use the no form of the command to remove an additional TPID. Doing so
removes the TPID from all interfaces. If the removed TPID is the primary
TPID for an interface, the interface is configured to use the default primary
TPID 0x8100.
Packets are always transmitted by the system using the primary TPID value in
the outer VLAN tag.
It is not possible to configure an inner VLAN TPID value. The inner VLAN
TPID value is always 802.1Q (0x8100).
Use the switchport dot1q ethertype Interface Configuration mode command
to apply a configured TPID value to an interface.