3.4 OSPF配置详解-大赛人网

5.OSPF特殊区域

1）基本配置

[R1]ospf 1 router-id 1.1.1.1
[R1-ospf-1]area 1
[R1-ospf-1-area-0.0.0.1]network 1.1.1.1 0.0.0.0
[R1-ospf-1-area-0.0.0.1]network 12.1.1.0 0.255.255.255

[R2]ospf 1 router-id 2.2.2.2
[R2-ospf-1]area 1
[R2-ospf-1-area-0.0.0.1]network 12.1.1.0 0.255.255.255
[R2-ospf-1]area 0
[R2-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0
[R2-ospf-1-area-0.0.0.0]network 23.1.1.0 0.255.255.255

[R3]ip route-static 192.168.1.0 24 NULL 0
[R3]ip route-static 192.168.2.0 24 NULL 0
[R3]ospf 1 router-id 3.3.3.3
[R3-ospf-1]area 0
[R3-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0 
[R3-ospf-1-area-0.0.0.0]network 23.1.1.0 0.255.255.255
[R3-ospf-1]import-route static

2）查看R1的OSPF路由表

[R1]display ip routing-table protocol ospf 
Destination/Mask    Proto   Pre  Cost      Flags NextHop 
2.2.2.2/32  OSPF    10   1           D   12.1.1.2        GigabitEthernet0/0/0
3.3.3.3/32  OSPF    10   2           D   12.1.1.2        GigabitEthernet0/0/0
23.0.0.0/8   OSPF    10   2           D   12.1.1.2        GigabitEthernet0/0/0
192.168.1.0/24  O_ASE   150  1           D   12.1.1.2        GigabitEthernet0/0/0
192.168.2.0/24  O_ASE   150  1           D   12.1.1.2

3）查看R1的OSPF的LSDB

[R1]display  ospf lsdb 
         OSPF Process 1 with Router ID 1.1.1.1
                 Link State Database

                         Area: 0.0.0.1
Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metric
Router    2.2.2.2         2.2.2.2            517  36    80000004       1
Router    1.1.1.1         1.1.1.1            515  48    80000006       0 
Network   12.1.1.1        1.1.1.1            515  32    80000002       0
Sum-Net   23.0.0.0        2.2.2.2            474  28    80000001       1
Sum-Net   3.3.3.3         2.2.2.2            412  28    80000001       1
Sum-Net   2.2.2.2         2.2.2.2            483  28    80000001       0
Sum-Asbr  3.3.3.3         2.2.2.2            314  28    80000001       1 

                 AS External Database
Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metric
External  192.168.2.0     3.3.3.3            315  36    80000001       1
External  192.168.1.0     3.3.3.3            315  36    80000001       1

4）area 1配置为Stub区

[R1]ospf 1 
[R1-ospf-1]area 1
[R1-ospf-1-area-0.0.0.1]stub 
[R2]ospf 1  
[R2-ospf-1]area 1

5）查看R1的OSPF路由表（不在学习外部路由，R2下发Type-3默认路由）

[R1]display  ip routing-table protocol ospf 
Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface
0.0.0.0/0   OSPF    10   2           D   12.1.1.2        GigabitEthernet0/0/0
2.2.2.2/32  OSPF    10   1           D   12.1.1.2        GigabitEthernet0/0/0
3.3.3.3/32  OSPF    10   2           D   12.1.1.2        GigabitEthernet0/0/0
23.0.0.0/8   OSPF    10   2           D   12.1.1.2        GigabitEther

6）查看R1的OSPF的LSDB

[R1]display  ospf lsdb 
         OSPF Process 1 with Router ID 1.1.1.1
                 Link State Database 
                         Area: 0.0.0.1
Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metric
Router    2.2.2.2         2.2.2.2            271  36    80000004       1
Router    1.1.1.1         1.1.1.1            265  48    80000005       0
Network   12.1.1.1        1.1.1.1            265  32    80000002       0
Sum-Net   0.0.0.0         2.2.2.2            276  28    80000001       1
Sum-Net   23.0.0.0        2.2.2.2            276  28    80000001       1
Sum-Net   3.3.3.3         2.2.2.2            276  28    80000001       1
Sum-Net   2.2.2.2         2.2.2.2            276  28    80000001       0

7）在R2配置area 1配置为Totally-Stub区

[R2]ospf 1
[R2-ospf-1]area 1
[R2-ospf-1-area-0.0.0.1]stub no-summary

8）查看R1的OSPF路由表

[R2]display ip routing-table protocol ospf 
Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface
  0.0.0.0/0   OSPF    10   2           D   12.1.1.2        GigabitEthe

9）查看R1的OSPF的LSDB

[R2]display ospf lsdb         
Type      LinkState ID    AdvRouter          Age  Len   Router    2.2.2.2         2.2.2.2            128  36    8000000E       1
 Router    1.1.1.1         1.1.1.1            132  48    8000000C       0
 Network   12.1.1.2        2.2.2.2            128  32    80000002       0
 Sum-Net   0.0.0.0         2.2.2.2            293  28    80000001       1

10）在R2配置area 1配置为NSSA区

图片[2]-3.4 OSPF配置详解-大赛人网 — 图3-48 OSPF 多区域配置（及NSSA、Totally-NSSA）网络拓扑

[R1]ip route-static 192.168.3.0 24 NULL 0
[R1]ospf 1
[R2-ospf-1]import-route static
[R1-ospf-1-area-0.0.0.1]undo stub 
[R1-ospf-1-area-0.0.0.1]nssa

[R2]ospf 1 
[R2-ospf-1]area 1
[R2-ospf-1-area-0.0.0.1]
[R2-ospf-1-area-0.0.0.1]undo  stub 
[R2-ospf-1-area-0.0.0.1]nssa

11）查看R1的OSPF路由表

[R1]display ip routing-table protocol ospf 
Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface
0.0.0.0/0   O_NSSA  150  1           D   12.1.1.2        GigabitEthernet0/0/0
2.2.2.2/32  OSPF    10   1           D   12.1.1.2        GigabitEthernet0/0/0
3.3.3.3/32  OSPF    10   2           D   12.1.1.2        GigabitEthernet0/0/0
23.0.0.0/8   OSPF    10   2           D   12.1.1.2        GigabitEthernet0/0/0

12）查看R1的OSPF的LSDB

[R1]display ospf lsdb 
                         Area: 0.0.0.1
Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metric
Router    2.2.2.2         2.2.2.2             74  36    80000006       1
Router    1.1.1.1         1.1.1.1             68  48    80000011       0
Network   12.1.1.1        1.1.1.1             68  32    80000002       0
Sum-Net   23.0.0.0        2.2.2.2             79  28    80000001       1
Sum-Net   3.3.3.3         2.2.2.2             79  28    80000001       1
Sum-Net   2.2.2.2         2.2.2.2             79  28    80000001       0
NSSA      192.168.3.0     1.1.1.1            180  36    80000001       1
NSSA      0.0.0.0         2.2.2.2             79  36    80000001       1

13）查看R3的OSPF的LSDB

<R3>display ospf lsdb 
         Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metric
 Router    2.2.2.2         2.2.2.2           1611  48    80000008       1
 Router    3.3.3.3         3.3.3.3            698  48    80000007       1
 Network   23.1.1.2        2.2.2.2            797  32    80000004       0
 Sum-Net   1.1.1.1         2.2.2.2            198  28    80000001       1
 Sum-Net   12.0.0.0        2.2.2.2            201  28    80000007       1
 

                 AS External Database
 Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metric
 External  192.168.2.0     3.3.3.3            698  36    80000003       1
 External  192.168.1.0     3.3.3.3            698  36    80000003       1
 External  192.168.3.0     2.2.2.2            198  36    80000001       1

14）查看R3的OSPF的路由表

<R3>display ip routing-table protocol ospf 
Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface
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
12.0.0.0/8   OSPF    10   2           D   23.1.1.2        GigabitEthernet0/0/1
192.168.3.0/24  O_ASE   150  1           D   23.1.1.2        GigabitEthernet0/0/1

15）在R2配置area 1配置为Totally-NSSA区

[R2]ospf 1  
[R2-ospf-1]area 1  
[R2-ospf-1-area-0.0.0.1]nssa  no-summary

16）在R1查看OSPF的LSDB

<R1>display  ospf lsdb 
 Router    2.2.2.2         2.2.2.2             13  36    80000008       1
 Router    1.1.1.1         1.1.1.1              6  48    8000001B       0
 Network   12.1.1.1        1.1.1.1              6  32    80000002       0
 Sum-Net   0.0.0.0         2.2.2.2             19  28    80000001       1
 NSSA      192.168.3.0     1.1.1.1            471  36    80000001       1
 NSSA      0.0.0.0         2.2.2.2            370  36    80000001       1

17）在R1查看OSPF的路由表

[R1]display ip routing-table protocol ospf 
Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface
0.0.0.0/0   OSPF    10   2           D   12.1.1.2        GigabitEthernet0/0/0

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