配置基于VLAN的VLAN Mapping示例（2 to 1）

此举例是2 to 1 VLAN Mapping中的N:1场景，因为外层和内层VLAN Tag不同的业务报文，外层映射到了同一个VLAN。

如图10-7所示，用户通过家庭网关、楼道交换机和小区交换机接入汇聚层网络，为了节省运营商网络VLAN资源，及实现不同用户相同业务在传输过程中相互隔离，可以在楼道交换机上部署QinQ功能，在小区交换机上部署VLAN Mapping功能。

图10-7 2:1 VLAN Mapping组网图

配置思路

采用如下的思路配置2:1 VLAN Mapping：

1. 将连接用户的交换机接口分别划分到指定VLAN中，以区分不同的业务。

2. 在楼道交换机上部署QinQ功能，以区分用户、业务。

3. 在小区交换机上部署VLAN Mapping功能，节约VLAN资源。

操作步骤

1. 将S1和S2的下行口划分到指定的VLAN中

   # 配置S1。

   <HUAWEI> system-view
   [HUAWEI] sysname S1
   [S1] vlan batch 2 to 4
   [S1] interface gigabitethernet 0/0/1
   [S1-GigabitEthernet0/0/1] port link-type access
   [S1-GigabitEthernet0/0/1] port default vlan 2
   [S1-GigabitEthernet0/0/1] quit
   [S1] interface gigabitethernet 0/0/2
   [S1-GigabitEthernet0/0/2] port link-type access
   [S1-GigabitEthernet0/0/2] port default vlan 3
   [S1-GigabitEthernet0/0/2] quit
   [S1] interface gigabitethernet 0/0/3
   [S1-GigabitEthernet0/0/3] port link-type access
   [S1-GigabitEthernet0/0/3] port default vlan 4
   [S1-GigabitEthernet0/0/3] quit
   [S1] interface gigabitethernet 0/0/4
   [S1-GigabitEthernet0/0/4] port link-type trunk
   [S1-GigabitEthernet0/0/4] port trunk allow-pass vlan 2 to 4
   [S1-GigabitEthernet0/0/4] quit

   # 配置S2。

   <HUAWEI> system-view
   [HUAWEI] sysname S2
   [S2] vlan batch 2 to 4
   [S2] interface gigabitethernet 0/0/1
   [S2-GigabitEthernet0/0/1] port link-type access
   [S2-GigabitEthernet0/0/1] port default vlan 2
   [S2-GigabitEthernet0/0/1] quit
   [S2] interface gigabitethernet 0/0/2
   [S2-GigabitEthernet0/0/2] port link-type access
   [S2-GigabitEthernet0/0/2] port default vlan 3
   [S2-GigabitEthernet0/0/2] quit
   [S2] interface gigabitethernet 0/0/3
   [S2-GigabitEthernet0/0/3] port link-type access
   [S2-GigabitEthernet0/0/3] port default vlan 4
   [S2-GigabitEthernet0/0/3] quit
   [S2] interface gigabitethernet 0/0/4
   [S2-GigabitEthernet0/0/4] port link-type trunk
   [S2-GigabitEthernet0/0/4] port trunk allow-pass vlan 2 to 4
   [S2-GigabitEthernet0/0/4] quit

2. 部署QinQ功能，使楼道交换机上送到小区交换机的报文带有双层VLAN Tag

   # 配置S3。

   <HUAWEI> system-view
   [HUAWEI] sysname S3
   [S3] vlan batch 201 401
   [S3] interface gigabitethernet 0/0/1
   [S3-GigabitEthernet0/0/1] port link-type hybrid
   [S3-GigabitEthernet0/0/1] port hybrid untagged vlan 201 401
   [S3-GigabitEthernet0/0/1] qinq vlan-translation enable
   [S3-GigabitEthernet0/0/1] port vlan-stacking vlan 2 to 3 stack-vlan 201
   [S3-GigabitEthernet0/0/1] port vlan-stacking vlan 4 stack-vlan 401
   [S3-GigabitEthernet0/0/1] quit
   [S3] interface gigabitethernet 0/0/2
   [S3-GigabitEthernet0/0/2] port link-type trunk
   [S3-GigabitEthernet0/0/2] port trunk allow-pass vlan 201 401
   [S3-GigabitEthernet0/0/2] quit

   # 配置S4。

   <HUAWEI> system-view
   [HUAWEI] sysname S4
   [S4] vlan batch 201 401
   [S4] interface gigabitethernet 0/0/1
   [S4-GigabitEthernet0/0/1] port link-type hybrid
   [S4-GigabitEthernet0/0/1] port hybrid untagged vlan 201 401
   [S4-GigabitEthernet0/0/1] qinq vlan-translation enable
   [S4-GigabitEthernet0/0/1] port vlan-stacking vlan 2 to 3 stack-vlan 201
   [S4-GigabitEthernet0/0/1] port vlan-stacking vlan 4 stack-vlan 401
   [S4-GigabitEthernet0/0/1] quit
   [S4] interface gigabitethernet 0/0/2
   [S4-GigabitEthernet0/0/2] port link-type trunk
   [S4-GigabitEthernet0/0/2] port trunk allow-pass vlan 201 401
   [S4-GigabitEthernet0/0/2] quit

3. 在S5上部署VLAN Mapping功能

   <HUAWEI> system-view
   [HUAWEI] sysname S5
   [S5] vlan batch 501
   [S5] interface gigabitethernet 0/0/1
   [S5-GigabitEthernet0/0/1] port link-type trunk
   [S5-GigabitEthernet0/0/1] port trunk allow-pass vlan 501
   [S5-GigabitEthernet0/0/1] qinq vlan-translation enable
   [S5-GigabitEthernet0/0/1] port vlan-mapping vlan 201 inner-vlan 2 to 3 map-vlan 501
   [S5-GigabitEthernet0/0/1] port vlan-mapping vlan 401 inner-vlan 4 map-vlan 501
   [S5-GigabitEthernet0/0/1] quit
   [S5] interface gigabitethernet 0/0/2
   [S5-GigabitEthernet0/0/2] port link-type trunk
   [S5-GigabitEthernet0/0/2] port trunk allow-pass vlan 501
   [S5-GigabitEthernet0/0/2] qinq vlan-translation enable
   [S5-GigabitEthernet0/0/2] port vlan-mapping vlan 201 inner-vlan 2 to 3 map-vlan 501
   [S5-GigabitEthernet0/0/2] port vlan-mapping vlan 401 inner-vlan 4 map-vlan 501
   [S5-GigabitEthernet0/0/2] quit
   [S5] interface gigabitethernet 0/0/3
   [S5-GigabitEthernet0/0/3] port link-type trunk
   [S5-GigabitEthernet0/0/3] port trunk allow-pass vlan 501
   [S5-GigabitEthernet0/0/3] quit

4. 验证配置结果

   上述配置完成后，不同家庭用户可以正常访问网络，相同业务共用一个VLAN传输。

配置文件

• S1的配置文件

  #
  sysname S1
  #
  vlan batch 2 to 4
  #
  interface GigabitEthernet0/0/1
   port link-type access
   port default vlan 2
  #
  interface GigabitEthernet0/0/2
   port link-type access
   port default vlan 3
  #
  interface GigabitEthernet0/0/3
   port link-type access
   port default vlan 4
  #
  interface GigabitEthernet0/0/4
   port link-type trunk
   port trunk allow-pass vlan 2 to 4
  #
  return

• S2的配置文件

  #
  sysname S2
  #
  vlan batch 2 to 4
  #
  interface GigabitEthernet0/0/1
   port link-type access
   port default vlan 2
  #
  interface GigabitEthernet0/0/2
   port link-type access
   port default vlan 3
  #
  interface GigabitEthernet0/0/3
   port link-type access
   port default vlan 4
  #
  interface GigabitEthernet0/0/4
   port link-type trunk
   port trunk allow-pass vlan 2 to 4
  #
  return

• S3的配置文件

  #
  sysname S3
  #
  vlan batch 201 401
  #
  interface GigabitEthernet0/0/1
   port link-type hybrid
   qinq vlan-translation enable
   port hybrid untagged vlan 201 401
   port vlan-stacking vlan 2 to 3 stack-vlan 201
   port vlan-stacking vlan 4 stack-vlan 401
  #
  interface GigabitEthernet0/0/2
   port link-type trunk
   port trunk allow-pass vlan 201 401
  #
  return

• S4的配置文件

  #
  sysname S4
  #
  vlan batch 201 401
  #
  interface GigabitEthernet0/0/1
   port link-type hybrid
   qinq vlan-translation enable
   port hybrid untagged vlan 201 401
   port vlan-stacking vlan 2 to 3 stack-vlan 201
   port vlan-stacking vlan 4 stack-vlan 401
  #
  interface GigabitEthernet0/0/2
   port link-type trunk
   port trunk allow-pass vlan 201 401
  #
  return

• S5的配置文件

  #
  sysname S5
  #
  vlan batch 501
  #
  interface GigabitEthernet0/0/1
   port link-type trunk
   qinq vlan-translation enable
   port trunk allow-pass vlan 501
   port vlan-mapping vlan 201 inner-vlan 2 to 3 map-vlan 501                                                                          
   port vlan-mapping vlan 401 inner-vlan 4 map-vlan 501
  #
  interface GigabitEthernet0/0/2
   port link-type trunk
   qinq vlan-translation enable
   port trunk allow-pass vlan 501
   port vlan-mapping vlan 201 inner-vlan 2 to 3 map-vlan 501                                                                          
   port vlan-mapping vlan 401 inner-vlan 4 map-vlan 501
  #
  interface GigabitEthernet0/0/3
   port link-type trunk
   port trunk allow-pass vlan 501
  #
  return