QINQ（Vlan堆叠）

基本QinQ

拓扑图

PC 1 1.1.1.1/24 PC2 1.1.1.2/24

[SW3-GigabitEthernet0/0/1]dis this
interface GigabitEthernet0/0/1
port link-type trunk
port trunk allow-pass vlan 2 to 4094

[SW3-GigabitEthernet0/0/1]int g0/0/2
[SW3-GigabitEthernet0/0/2]dis this
interface GigabitEthernet0/0/2
port link-type access
port default vlan 10

[SW1]int g0/0/1
[SW1-GigabitEthernet0/0/1]dis this
interface GigabitEthernet0/0/1
port link-type dot1q-tunnel
port default vlan 5

[SW1-GigabitEthernet0/0/1]int g0/0/2
[SW1-GigabitEthernet0/0/2]dis this
port link-type trunk
port trunk allow-pass vlan 2 to 4094

[SW2]int g0/0/1
[SW2-GigabitEthernet0/0/1]dis this
interface GigabitEthernet0/0/1
port link-type trunk
port trunk allow-pass vlan 2 to 4094

[SW2]int g0/0/2
[SW2-GigabitEthernet0/0/2]dis this
interface GigabitEthernet0/0/2
port link-type dot1q-tunnel
port default vlan 5

[SW2]int g0/0/1
[SW2-GigabitEthernet0/0/1]dis this
interface GigabitEthernet0/0/1
port link-type trunk
port trunk allow-pass vlan 2 to 4094

[SW2]int g0/0/2
[SW2-GigabitEthernet0/0/2]dis this
interface GigabitEthernet0/0/2
port link-type access
port default vlan 10

在SW2的g0/0/2接口上抓包，可以看到数据被打上了两层802.1Q标签

灵活QinQ

在基本QinQ配置的基础上增加PC3和PC4
清除SW1 g0/0/1和SW2g0/0/2接口上的配置 改成灵活QinQ 配置 如下 记得创建VLAN5和15

基于VLAN的灵活QinQ利用hybrid端口实现，需要按步骤在hybrid端口开启QinQ功能，设置灵活QinQ策略，设置去标签策略

[SW1]int g0/0/1
[SW1-GigabitEthernet0/0/1]dis this
interface GigabitEthernet0/0/1
qinq vlan-translation enable //开启QinQ功能
port hybrid untagged vlan 5 15 //设置去标签策略
port vlan-stacking vlan 10 stack-vlan 5 //如果内层标签是10，就再打上外标签5
port vlan-stacking vlan 20 stack-vlan 15 //如果内层标签是20，就再打上外标签15

[SW2]int g0/0/2
[SW2-GigabitEthernet0/0/2]dis this
interface GigabitEthernet0/0/2
qinq vlan-translation enable
port hybrid untagged vlan 5 15
port vlan-stacking vlan 10 stack-vlan 5
port vlan-stacking vlan 20 stack-vlan 15