4.13 配置area2位NSSA区域

1.R3查看OSPF路由信息

[R3]display ip routing-table protocol ospf
Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface
        0.0.0.0/0   O_ASE   150  1           D   34.1.1.4        GigabitEthernet0/0/0
        1.1.1.1/32  OSPF    10   2           D   23.1.1.2        GigabitEthernet0/0/1
        2.2.2.2/32  OSPF    10   1           D   23.1.1.2        GigabitEthernet0/0/1
        4.4.4.4/32  OSPF    10   1           D   34.1.1.4        GigabitEthernet0/0/0
       12.0.0.0/8   OSPF    10   2           D   23.1.1.2        GigabitEthernet0/0/1
       44.1.0.0/22  O_ASE   150  2           D   34.1.1.4        GigabitEthernet0/0/0

2.R3、R4的area2配置为NSSA区域

[R3]ospf 1
[R3-ospf-1]area 2 
[R3-ospf-1-area-0.0.0.2]nssa

[R4]ospf 1 
[R4-ospf-1]area 2
[R4-ospf-1-area-0.0.0.2]nssa 

3.R4查看OSPF路由信息

[R4-ospf-1-area-0.0.0.2]display ip routing-table protocol ospf
Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface
        0.0.0.0/0   O_NSSA  150  1           D   34.1.1.3        GigabitEthernet0/0/0
        1.1.1.1/32  OSPF    10   3           D   34.1.1.3        GigabitEthernet0/0/0
        2.2.2.2/32  OSPF    10   2           D   34.1.1.3        GigabitEthernet0/0/0
        3.1.0.1/32  OSPF    10   1           D   34.1.1.3        GigabitEthernet0/0/0
        3.1.2.1/32  OSPF    10   1           D   34.1.1.3        GigabitEthernet0/0/0
        3.1.3.1/32  OSPF    10   1           D   34.1.1.3        GigabitEthernet0/0/0
        3.3.3.3/32  OSPF    10   1           D   34.1.1.3        GigabitEthernet0/0/0
       12.0.0.0/8   OSPF    10   3           D   34.1.1.3        GigabitEthernet0/0/0
       23.0.0.0/8   OSPF    10   2           D   34.1.1.3        GigabitEthernet0/0/0

4.ABR（R3）配置为完全次末节区域

[R3]ospf 1
[R3-ospf-1]area 2
[R3-ospf-1-area-0.0.0.2]nssa no-summary

5.R4查看OSPF路由信息，没有了区域间路由

[R4]display ip routing-table protocol ospf
Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface
        0.0.0.0/0   OSPF    10   2           D   34.1.1.3        GigabitEthernet0/0/0
        3.1.0.1/32  OSPF    10   1           D   34.1.1.3        GigabitEthernet0/0/0
        3.1.2.1/32  OSPF    10   1           D   34.1.1.3        GigabitEthernet0/0/0
        3.1.3.1/32  OSPF    10   1           D   34.1.1.3        GigabitEthernet0/0/0
        3.3.3.3/32  OSPF    10   1           D   34.1.1.3        GigabitEthernet0/0/0