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3Com Switch 7750 Series
Command Reference Guide — Q-in-Q Commands Chapter 2 Selective Q-in-Q Configuration Commands
2-2
Example
# Configure that the single-tagged inbound packets of VLAN 8 through VLAN 15 are
tagged with VLAN 20 tags on Ethernet1/0/1 port. Configure Ethernet 1/0/5 as the uplink
port and configure it to remove the outer VLAN tag.
<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 8 to 15
2.1.2 vlan-vpn vid
Syntax
vlan-vpn vid vlan-id uplink interface-type interface-number [ untagged ]
undo vlan-vpn vid vlan-id
View
Ethernet port view
Parameter
vid vlan-id: ID of the VLAN whose tag is to be inserted to matched packets as the outer
VLAN tag.
uplink interface-type interface-number: Specifies an uplink port for the packet where
an outer VLAN tag is to be encapsulated.
Untagged: Configure whether to retain a VLAN tag when a packet encapsulated with
vid is transmitted through the uplink port.
Description
Use the vlan-vpn vid command to specify the VLAN whose tag is to be inserted to
matched packets as the outer VLAN tag and the uplink port for these packets. You can
use the raw-vlan-id inbound command to specify the VLANs, the single-tagged
packets of which are to be tagged with outer VLAN tags when the packets reach a
Q-in-Q-enabled port.
Use the undo vlan-vpn vid command to remove the configuration.
When the uplink port and the port to which a VLAN tag is inserted are not on the same
board, if the board where the uplink port resides is pulled out, this configuration is
invisible. After you insert this board again, the configuration is recovered.
When the specified uplink port is available, the configuration of the raw-vlan-id
inbound command remains unchanged after you modify the uplink port or the