QinQ工做原理

1、基础知识

2、场景

3、配置

SW1

interface GigabitEthernet0/0/1
 port link-type trunk
 port trunk allow-pass vlan 20 30
#
interface GigabitEthernet0/0/2
 port link-type access
 port default vlan 20
#
interface GigabitEthernet0/0/3
 port link-type access
 port default vlan 30
#

SW2

interface GigabitEthernet0/0/1
 port link-type dot1q-tunnel
 port default vlan 10

#
interface GigabitEthernet0/0/2
 port link-type trunk
 port trunk allow-pass vlan 10

SW3

interface GigabitEthernet0/0/1
 port link-type trunk
 port trunk allow-pass vlan 10
#
interface GigabitEthernet0/0/2
 port link-type dot1q-tunnel
 port default vlan 10
#

SW4

interface GigabitEthernet0/0/1
 port link-type trunk
 port trunk allow-pass vlan 20 30
#
interface GigabitEthernet0/0/2
 port link-type access
 port default vlan 20
#
interface GigabitEthernet0/0/3
 port link-type access
 port default vlan 30

业务名称	vlan区间	外层vlan
租户1	20	10
租户2	30	10

PC1中的数据——>进入SW2的GE0/0/1的报文封装外层vlan 10,反之相同

SW2<——>SW3容许VLAN10的报文经过

[HUAWEI] interface gigabitethernet0/0/1
[HUAWEI-GigabitEthernet0/0/1] port link-type hybrid  
[HUAWEI-GigabitEthernet0/0/1] port hybrid untagged vlan 2 3   #外层标签 

[HUAWEI-GigabitEthernet0/0/1] port hybrid tagged vlan 1000  #接口透传单层VLAN 1000，内层标签

[HUAWEI-GigabitEthernet0/0/1] port vlan-stacking vlan 100 to 200 stack-vlan 2  #对内层VLAN 100～200的报文添加上VLAN ID为2的外层Tag
[HUAWEI-GigabitEthernet0/0/1] port vlan-stacking vlan 300 to 400 stack-vlan 3  #对内层VLAN 300～400的报文添加上VLAN ID为3的外层Tag
[HUAWEI-GigabitEthernet0/0/1] port vlan-mapping vlan 1000 map-vlan 1000  #对单层透传的VLAN，须要配置自身映射到自身的VLAN Mapping，其余形态不须要配置

[HUAWEI-GigabitEthernet0/0/1] qinq vlan-translation enable   #盒式设备，必须先使能VLAN转换功能

[HUAWEI-GigabitEthernet0/0/1] quit