华为eNSP实验-QinQ基本实验

1.拓扑图如下

PC1的设置如下：

在未配置VLAN之前，PC1可以ping通PC3，PC2可以ping通PC4（因为同一网段）

2.SW1和SW4配置VLAN

<Huawei>system-view 
[Huawei]undo info-center enable  //关闭提示信息
[Huawei]sysname SW1
[SW1]vlan batch 10 20
[SW1]interface GigabitEthernet 0/0/1
[SW1-GigabitEthernet0/0/1]port link-type access 
[SW1-GigabitEthernet0/0/1]port default vlan 10
[SW1-GigabitEthernet0/0/1]int g0/0/2
[SW1-GigabitEthernet0/0/2]port link-type access 
[SW1-GigabitEthernet0/0/2]port default vlan 20	
[SW1-GigabitEthernet0/0/2]int g0/0/24
[SW1-GigabitEthernet0/0/24]port link-type trunk
[SW1-GigabitEthernet0/0/24]port trunk allow-pass vlan 10 20

<Huawei>system-view 
[Huawei]sysname SW4
[SW4]undo info-center enable
[SW4]vlan batch 10 20
[SW4]interface g0/0/1
[SW4-GigabitEthernet0/0/1]port link-type access
[SW4-GigabitEthernet0/0/1]port default vlan 10 
[SW4-GigabitEthernet0/0/1]int g0/0/2
[SW4-GigabitEthernet0/0/2]port link-type access 
[SW4-GigabitEthernet0/0/2]port default vlan 20
[SW4-GigabitEthernet0/0/2]int g0/0/24
[SW4-GigabitEthernet0/0/24]port link-type trunk 
[SW4-GigabitEthernet0/0/24]port trunk allow-pass vlan 10 20

配完后，PC1和PC2，PC3，PC4都不通（原因，SW2和SW3未配VLAN）

3.配置SW2交换机

<Huawei>system-view 
[Huawei]undo info-center enable 
[Huawei]sysname SW2
[SW2]vlan 100
[SW2]interface GigabitEthernet 0/0/24
[SW2-GigabitEthernet0/0/24]port link-type dot1q-tunnel
[SW2-GigabitEthernet0/0/24]port default vlan 100 
[SW2-GigabitEthernet0/0/24]int g0/0/23
[SW2-GigabitEthernet0/0/23]port link-type trunk 
[SW2-GigabitEthernet0/0/23]port trunk allow-pass vlan 100

4.配置SW3交换机

<Huawei>system-view 
[Huawei]un in en
[Huawei]sysname SW3
[SW3]vlan 100
[SW3]interface GigabitEthernet 0/0/23
[SW3-GigabitEthernet0/0/23]port link-type trunk 
[SW3-GigabitEthernet0/0/23]port trunk allow-pass vlan 100 
[SW3-GigabitEthernet0/0/23]int g0/0/24
[SW3-GigabitEthernet0/0/24]port link-type dot1q-tunnel 
[SW3-GigabitEthernet0/0/24]port default vlan 100

验证：PC1可以ping通PC3，PC2可以ping通PC4

5. PC1不间断pingPC3，PC2不间断pingPC4，在SW2端口0/0/23上抓包，可以发现对应的VLAN

5.1 如下图，10.1.1.2发向10.1.1.3的数据包中，内层VLAN为10，外层VLAN为100.