按照拓扑，模拟SW2-SW3之间为公网，运行公网VLAN 100和VLAN 200
实验要求：两端的VLAN10和VLAN20，相同VLAN之间可以互相通讯，在公网上分为VLAN10增加VLAN100 Tag，VLAN20增加VLAN200 Tag。
配置如下：
SW4：
sysname SW4 # vlan batch 10 20 # interface GigabitEthernet0/0/1 port link-type access port default vlan 20 # interface GigabitEthernet0/0/2 port link-type trunk port trunk allow-pass vlan 10 20 # interface GigabitEthernet0/0/3 port link-type access port default vlan 10 #
SW2:
# sysname SW2 # vlan batch 100 200 # interface GigabitEthernet0/0/1 qinq vlan-translation enable port hybrid untagged vlan 100 200 port vlan-stacking vlan 10 stack-vlan 100 port vlan-stacking vlan 20 stack-vlan 200 # interface GigabitEthernet0/0/2 port link-type trunk port trunk allow-pass vlan 100 200 #
SW1：
# sysname SW1 # vlan batch 100 200 # interface GigabitEthernet0/0/1 port link-type trunk port trunk allow-pass vlan 100 200 # interface GigabitEthernet0/0/2 port link-type trunk port trunk allow-pass vlan 100 200 #
SW3：
# sysname SW3 # vlan batch 100 200 # interface GigabitEthernet0/0/1 port link-type trunk port trunk allow-pass vlan 100 200 # interface GigabitEthernet0/0/2 qinq vlan-translation enable port hybrid untagged vlan 100 200 port vlan-stacking vlan 10 stack-vlan 100 port vlan-stacking vlan 20 stack-vlan 200 #
SW5：
# sysname SW5 # vlan batch 10 20 # interface GigabitEthernet0/0/1 port link-type trunk port trunk allow-pass vlan 10 20 # interface GigabitEthernet0/0/2 port link-type access port default vlan 10 # interface GigabitEthernet0/0/3 port link-type access port default vlan 20 #
实验结果：相同VLAN之间可以互相访问，在LSW1上抓包可以看见两层的VLAN Tag。
注意：灵活QinQ只能拥有2层标签，不支持多层标签。