3Com Switch 7750 Configuration Guide

Displaying QinQ 161
n
The Voice VLAN feature is mutually exclusive with the QinQ feature for a port.
■ When you use the specific command to enable the Voice VLAN feature for a
QinQ-enabled port, the switch will prompt errors.
■ If you use the copy configuration command to duplicate the configuration of
a port to a QinQ-enabled port, the Voice VLAN feature is not duplicated.
c
CAUTION: The 3C16863 and 3C16862 I/O Modules do not support the QinQ
feature.
Displaying QinQ After the configuration above, you can verify QinQ configuration by executing the
display command in any view.
QinQ Configuration
Example
Network requirements
■ Switch A, Switch B, and Switch C are Switch 7750s.
■ Two networks are connected to the Ethernet2/0/1 ports of Switch A and Switch
C.
■ Switch B only permits the packets of VLAN 10.
■ It is required that packets of the VLANs other than VLAN 10 be exchanged
between the networks connected to Switch A and Switch C.
Enter Ethernet port view interface interface-type
interface-number
-
Enable QinQ for the port vlan-vpn enable Required
By default, QinQ is disabled on a
port.
Configure inner-to-outer
tag priority mapping
vlan-vpn priority
inner-priority remark
outer-priority
Optional
Table 98 Configure QinQ
Operation Command Description
Table 99 Display QinQ configuration
Operation Command Description
Display the QinQ configuration
of all the ports
display port vlan-vpn This command can be executed in
any view.