![图片[1]-4.19 点到点子接口运行OSPF-大赛人网](https://www.dsrw.com/wp-content/uploads/2023/03/图片1-25.png)
1.R1配置子接口
[R1]interface Serial 0/0/0.12 p2p
[R1-Serial0/0/0.12]ip address 12.1.1.1 8
[R1-Serial0/0/0.12]fr dlci 102
[R1]interface Serial 0/0/0.13 p2p
[R1-Serial0/0/0.13]ip address 13.1.1.1 8
[R1-Serial0/0/0.13]fr dlci 103
2.R2配置子接口
[R2]interface Serial 0/0/0.12 p2p
[R2-Serial0/0/0.12]ip address 12.1.1.2 8
[R2-Serial0/0/0.12]fr dlci 201
3.R3配置子接口
[R3]interface Serial 0/0/0.13 p2p
[R3-Serial0/0/0.13]ip address 13.1.1.3 8
[R3-Serial0/0/0.13]fr dlci 301
4.R1配置子OSPF
[R1]ospf 1 router-id 1.1.1.1
[R1-ospf-1]area 0
[R1-ospf-1-area-0.0.0.0]network 1.1.1.1 0.0.0.0
[R1-ospf-1-area-0.0.0.0]network 12.1.1.0 0.255.255.255
[R1-ospf-1-area-0.0.0.0]network 13.1.1.0 0.255.255.255
5.R2配置子OSPF
[R2]ospf 1 router-id 2.2.2.2
[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 12.1.1.0 0.255.255.255
6.R3配置子OSPF
[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 13.1.1.0 0.255.255.255
7.查看R1的OSPF网络接口,为NBMA类型
[R1]display ospf interface Serial 0/0/0.12
Cost: 1562 State: DR Type: NBMA MTU: 1500
Interface: 13.1.1.1 (Serial0/0/0.13)
Cost: 1562 State: DR Type: NBMA MTU: 1500
8.修改R1、R2、R3的OSPF网络接口类型为p2p类型
[R1]interface Serial 0/0/0.12
[R1-Serial0/0/0.12]ospf network-type p2p
[R1]interface Serial 0/0/0.13
[R1-Serial0/0/0.13]ospf network-type p2p
[R2]interface Serial 0/0/0.12
[R2-Serial0/0/0.12]ospf network-type p2p
[R3]interface Serial 0/0/0.13
[R3-Serial0/0/0.13]ospf network-type p2p
9.查看R1的OSPF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 1562 D 12.1.1.2 Serial0/0/0.12
3.3.3.3/32 OSPF 10 1562 D 13.1.1.3 Serial0/0/0.13
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