3Com 7750 Series Command Reference Manual page 155

3Com Switch 7750 Series
Command Reference Guide — Q-in-Q Commands
untagged attribute. When the uplink port is not available, if you modify this configuration,
the configuration of the raw-vlan-id inbound command is removed at the same time.
Caution:
Do not add a Q-in-Q-enabled port and its corresponding uplink port into the same link
aggregation group.
Note that the vlan-vpn vid command needs to be coupled by the raw-vlan-id inbound
command.
Example
# Configure to insert the outer tag VLAN 20 to the packets whose inner tag is VLAN 10
received on Ethernet1/0/1.Specify Ethernet1/0/5 as the uplink port. Configure the port
to remove the outer VLAN tag of the packets.
<3Com> system-view
System View: return to User View with Ctrl+Z.
[3Com] interface Ethernet 1/0/1
[3Com-Ethernet1/0/1] vlan-vpn vid 20 uplink Ethernet 1/0/5 untagged
[3Com-Ethernet1/0/1-vid-20] raw-vlan-id inbound 10
Chapter 2 Selective Q-in-Q Configuration Commands
2-3