考试要求，站点1、站点2通过单臂路由方式配置，站点3通过单臂路由+qinq方式配置

需求如下：

pc6-vlan60（内层vlan）-vlan600（外层vlan）

pc7-vlan70（内层vlan）-vlan700（外层vlan）

配置如下：

sw7作为接入交换机，连接pc，正常vlan配置即可

[huawei]sysname sw7
[sw7]undo info-center enable
[sw7]vlan batch 60 70
[sw7]interface GigabitEthernet0/0/1
[sw7-GigabitEthernet0/0/1] port link-type trunk
[sw7-GigabitEthernet0/0/1] port trunk allow-pass vlan 60 70
[sw7-GigabitEthernet0/0/1]#
[sw7-GigabitEthernet0/0/1]interface GigabitEthernet0/0/2
[sw7-GigabitEthernet0/0/2] port link-type access
[sw7-GigabitEthernet0/0/2] port default vlan 60
[sw7-GigabitEthernet0/0/2]#
[sw7-GigabitEthernet0/0/2]interface GigabitEthernet0/0/3
[sw7-GigabitEthernet0/0/3] port link-type access
[sw7-GigabitEthernet0/0/3] port default vlan 70

路由器的子接口和sw6为qinq配置

sw6配置

[huawei]sysname sw6
[sw6]undo info-center enable
[sw6]vlan batch 60 70 600 700
[sw6]interface GigabitEthernet0/0/1
[sw6-GigabitEthernet0/0/1] port link-type trunk
[sw6-GigabitEthernet0/0/1] port trunk allow-pass vlan 600 700
[sw6-GigabitEthernet0/0/1]#
[sw6-GigabitEthernet0/0/1]interface GigabitEthernet0/0/2
[sw6-GigabitEthernet0/0/2] qinq vlan-translation enable //开启QinQ的VLAN转换功能
[sw6-GigabitEthernet0/0/2] port hybrid untagged vlan 600 700 //定义接口出方向剥离VLAN100和VLAN200的标签（其实就是外层ip）
[sw6-GigabitEthernet0/0/2] port vlan-stacking vlan 60 stack-vlan 600//接口收到来自VLAN60的数据帧后叠加一层VLAN600的外层标签
[sw6-GigabitEthernet0/0/2]port vlan-stacking vlan 70 stack-vlan 700//接口收到来自VLAN70的数据帧后叠加一层VLAN700的外层标签

路由器配置

[R3]sysname R3
[R3]undo info-center enable
[R3]interface GigabitEthernet0/0/1.600
[R3-GigabitEthernet0/0/1.600] qinq termination pe-vid 600 ce-vid 60 //拆外层vlan600 识别内层vlan60
[R3-GigabitEthernet0/0/1.600] ip address 192.168.1.222 255.255.255.224
[R3-GigabitEthernet0/0/1.600] arp broadcast enable
[R3-GigabitEthernet0/0/1.600]interface GigabitEthernet0/0/1.700
[R3-GigabitEthernet0/0/1.700] qinq termination pe-vid 700 ce-vid 70 //拆外层vlan700 识别内层vlan70
[R3-GigabitEthernet0/0/1.700] ip address 192.168.1.238 255.255.255.224
[R3-GigabitEthernet0/0/1.700] arp broadcast enable

qinq配置完成后就可以实现单臂路由通信了，通信过程中内层标签外多了一层外层标签