3Com S7906E Command Reference Manual page 266

<Sysname> system-view
[Sysname] interface gigabitethernet 2/0/1
[Sysname-GigabitEthernet2/0/1] qinq enable downlink
# Enable customer-side QinQ on port group 1.
<Sysname> system-view
[Sysname] port-group manual 1
[Sysname-port-group-manual-1] group-member gigabitethernet 2/0/1 to gigabitethernet 2/0/6
[Sysname-port-group-manual-1] qinq enable downlink
qinq enable uplink
Syntax
qinq enable uplink
undo qinq enable
View
Ethernet interface view, port group view, Layer-2 aggregate interface view
Default Level
2: System level
Parameters
None
Description
Use the qinq enable uplink command to enable service provider-side QinQ on the current Ethernet
port(s).
Use the undo enable downlink command to disable service provider-side QinQ on the current
Ethernet port(s).
By default, service provider-side QinQ is disabled on Ethernet ports.
Configuration made in Ethernet interface view takes effect on the current port only, while configuration
made in port group view takes effect on all ports in the port group.
Examples
# Enable service provider-side QinQ on GigabitEthernet 2/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 2/0/1
[Sysname-GigabitEthernet2/0/1] qinq enable uplink
# Enable service provider-side QinQ on port group 1.
<Sysname> system-view
[Sysname] port-group manual 1
[Sysname-port-group-manual-1] group-member gigabitethernet 2/0/1 to gigabitethernet 2/0/6
[Sysname-port-group-manual-1] qinq enable uplink
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