1. 创建VLAN
[LSW1]vlan batch 100 200
[LSW2]vlan batch 100 200
2. 配置接口类型为QinQ，并配置外层vlan
[LSW1-GigabitEthernet0/0/1]port link-type dot1q-tunnel
[LSW1-GigabitEthernet0/0/1]port default vlan 100
[LSW1-GigabitEthernet0/0/2]port link-type dot1q-tunnel
[LSW1-GigabitEthernet0/0/2]port default vlan 200
[LSW2-GigabitEthernet0/0/3]port link-type dot1q-tunnel
[LSW2-GigabitEthernet0/0/3]port default vlan 100
[LSW2-GigabitEthernet0/0/4]port link-type dot1q-tunnel
[LSW2-GigabitEthernet0/0/4]port default vlan 200
3. 配置Switch连接公网侧的接口
[LSW1-GigabitEthernet0/0/3]port link-type trunk
[LSW1-GigabitEthernet0/0/3]port trunk allow-pass vlan 100 200
[LSW2-GigabitEthernet0/0/1]port link-type trunk
[LSW2-GigabitEthernet0/0/1]port trunk allow-pass vlan 100 200
4. 配置外层VLAN tag的TPID值
[LSW1-GigabitEthernet0/0/3]qinq protocol 9100
[LSW2-GigabitEthernet0/0/1]qinq protocol 9100
5.IPS配置略
