QinQ工做原理

1、基礎知識

2、場景

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

業務名稱	vlan區間	外層vlan
租戶1	20	10
租戶2	30	10

PC1中的數據——>進入SW2的GE0/0/1的報文封裝外層vlan 10,反之相同

SW2<——>SW3容許VLAN10的報文經過

[HUAWEI] interface gigabitethernet0/0/1
[HUAWEI-GigabitEthernet0/0/1] port link-type hybrid  
[HUAWEI-GigabitEthernet0/0/1] port hybrid untagged vlan 2 3   #外層標籤 

[HUAWEI-GigabitEthernet0/0/1] port hybrid tagged vlan 1000  #接口透傳單層VLAN 1000，內層標籤

[HUAWEI-GigabitEthernet0/0/1] port vlan-stacking vlan 100 to 200 stack-vlan 2  #對內層VLAN 100～200的報文添加上VLAN ID爲2的外層Tag
[HUAWEI-GigabitEthernet0/0/1] port vlan-stacking vlan 300 to 400 stack-vlan 3  #對內層VLAN 300～400的報文添加上VLAN ID爲3的外層Tag
[HUAWEI-GigabitEthernet0/0/1] port vlan-mapping vlan 1000 map-vlan 1000  #對單層透傳的VLAN，須要配置自身映射到自身的VLAN Mapping，其餘形態不須要配置

[HUAWEI-GigabitEthernet0/0/1] qinq vlan-translation enable   #盒式設備，必須先使能VLAN轉換功能

[HUAWEI-GigabitEthernet0/0/1] quit