Vlan-mapping、QINQ和802.1q隧道堆叠Vlan

Vlan-mapping：二层隧道，城域网技术。

在ISP连接客户端的交换机上配置：

①定义truank链路

②启用qinq的vlan转换能力

③定义vlan映射列表

④定义vlan允许列表

实验拓扑：

实验配置：

[sw1]vlan batch 10 20 1000 2000

[sw1]int g 0/0/2	
[sw1-GigabitEthernet0/0/2]port  link-type  trunk 
[sw1-GigabitEthernet0/0/2]qinq vlan-translation enable 
[sw1-GigabitEthernet0/0/2]port vlan-mapping vlan 10 map-vlan 1000
[sw1-GigabitEthernet0/0/2]port vlan-mapping vlan 20 map-vlan 2000
[sw1-GigabitEthernet0/0/2]port trunk allow-pass vlan 1000 2000

[sw1-GigabitEthernet0/0/2]int g 0/0/1
[sw1-GigabitEthernet0/0/1]port link-type trunk 
[sw1-GigabitEthernet0/0/1]port trunk allow-pass vlan 1000 2000

	
[sw 2]vlan batch 10 20 1000 2000

[sw 2]int g 0/0/2
[sw 2-GigabitEthernet0/0/2]port link-type trunk 
[sw 2-GigabitEt