h3c vlan qinq配置问题

实验组图

配置如下:

配置SWC:

[SWC]vlan 10

[SWC-vlan10]port GigabitEthernet 1/0/3

[SWC-vlan10]quit

[SWC]interface GigabitEthernet 1/0/1

[SWC-GigabitEthernet1/0/1]port link-type trunk

[SWC-GigabitEthernet1/0/1]port trunk permit vlan 10

配置SWD:

[SWD]vlan 10

[SWD-vlan10]port GigabitEthernet 1/0/3

[SWD-vlan10]quit

[SWD]interface GigabitEthernet 1/0/2

[SWD-GigabitEthernet1/0/2]port link-type trunk

[SWD-GigabitEthernet1/0/2]port trunk permit vlan 10

配置SWA:

[SWA]interface GigabitEthernet 1/0/1

[SWA-GigabitEthernet1/0/1]port link-type trunk

[SWA-GigabitEthernet1/0/1]port trunk permit vlan 100 10

[SWA-GigabitEthernet1/0/1]port trunk pvid vlan 100

[SWA-GigabitEthernet1/0/1]qinq enable

[SWA-GigabitEthernet1/0/48]port link-type trunk

[SWA-GigabitEthernet1/0/48]port trunk permit vlan 100

[SWA-GigabitEthernet1/0/48]qinq ethernet-type service-tag 8200

配置SWB:

[SWB]interface GigabitEthernet 1/0/2

[SWB-GigabitEthernet1/0/2]port link-type trunk

[SWB-GigabitEthernet1/0/2]port trunk permit vlan 100 10

[SWB-GigabitEthernet1/0/2]port trunk pvid vlan 100

[SWB-GigabitEthernet1/0/2]qinq enable

[SWB-GigabitEthernet1/0/48]port link-type trunk

[SWB-GigabitEthernet1/0/48]port trunk permit vlan 100

[SWB-GigabitEthernet1/0/48]qinq ethernet-type service-tag 8200

完全按照官方配置实例配置，但是最终还是无法使PCA和PCB互通，不知问题出在哪里？求老师们看看。