<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] port link-type trunk
[Sysname-GigabitEthernet1/0/1] port trunk permit vlan 2 3 50 to 100
[Sysname-GigabitEthernet1/0/1] qinq enable
[Sysname-GigabitEthernet1/0/1] qinq transparent-vlan 2 3 50 to 100
198