4.9 汇总OSPF路由

1.R3新生成直连路由，宣告进OSPF

[R3]interface LoopBack 0
[R3-LoopBack0]ip address 3.1.2.1 255.255.255.0 sub
[R3-LoopBack0]ip address 3.1.3.1 255.255.255.0 sub
[R3-LoopBack0]ip address 3.1.0.1 255.255.255.0 sub
[R3-LoopBack0]ospf enable 1 area 2

2.R3新生成直连路由执行区域内汇总

[R3]ospf 1
[R3-ospf-1]area 2
[R3-ospf-1-area-0.0.0.2]abr-summary 3.1.0.0 255.255.252.0

3.R1查看OSPF上3.1.0.0/22汇总路由信息

<R1>display ip routing-table protocol ospf 
Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface
        2.2.2.2/32  OSPF    10   10          D   12.1.1.2        GigabitEthernet0/0/0
        3.3.3.3/32  OSPF    10   11          D   12.1.1.2        GigabitEthernet0/0/0
        4.4.4.4/32  OSPF    10   12          D   12.1.1.2        GigabitEthernet0/0/0
       23.0.0.0/8   OSPF    10   11          D   12.1.1.2        GigabitEthernet0/0/0
       3.1.0.0/22  OSPF    10   11          D   12.1.1.2        GigabitEthernet0/0/0
       34.0.0.0/8   OSPF    10   12          D   12.1.1.2        GigabitEthernet0/0/0
       44.1.1.1/32  O_ASE   150  1           D   12.1.1.2        GigabitEthernet0/0/0
       44.1.2.1/32  O_ASE   150  1           D   12.1.1.2        GigabitEthernet0/0/0

3.R4新增路由执行路由汇总，R1查看44.1.0.0/22汇总路由信息

[R4]ospf 1
[R4-ospf-1]asbr-summary 44.1.0.0 255.255.252.0
<R1>display ip routing-table protocol ospf
 44.1.0.0/22  O_ASE   150  2           D   12.1.1.2        GigabitEthernet0/0/0