拓扑图:

配置

路由基本配置 Router> Router> Router>en Router#conf ter Enter configuration commands, one per line. End with CNTL/Z. Router(config)#host r1 r1(config)#no ip domain lookup r1(config)#line conso r1(config)#line console 0 r1(config-line)#exect-tiemou r1(config-line)#exect-time r1(config-line)#exec-tim r1(config-line)#exec-timeout 00 r1(config-line)#log r1(config-line)#logg r1(config-line)#logging sync r1(config-line)#logging synchronous r1(config-line)#exit r1(config)#inter s1/1 r1(config-if)#ip address 10.10.10.1 255.255.255.0 r1(config-if)#no shut r1(config-if)#no shutdown r1(config-if)#exit r1(config)#inter loopback 1

r1(config-if)# %LINK-5-CHANGED: Interface Loopback1, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up

r1(config-if)#ip address 172.16.1.1 255.255.255.0 r1(config-if)#no shut r1(config-if)#inter loop 2

r1(config-if)# %LINK-5-CHANGED: Interface Loopback2, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback2, changed state to up

r1(config-if)#ip address 171.16.2.1 255.255.255.0 r1(config-if)#no shutdown r1(config-if)#inter loop 1 r1(config-if)#ip address 171.16.1.1 255.255.255.0 r1(config-if)#no shut r1(config-if)#inter loop 3

r1(config-if)# %LINK-5-CHANGED: Interface Loopback3, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback3, changed state to up

r1(config-if)#ip address 171.16.3.1 255.255.255.0 r1(config-if)#no shutdown r1(config-if)#exit

配置单区域ospf路由 r1(config-if)#ip address 171.16.3.1 255.255.255.0 r1(config-if)#no shutdown r1(config-if)#exit r1(config)#router os r1(config)#router ospf a r1(config)#router ospf ? <1-65535> Process ID r1(config)#router ospf 111 ? <cr> r1(config)#router ospf 111 r1(config-router)#net r1(config-router)#network ? A.B.C.D Network number r1(config-router)#network 10.10.10.0 0.0.0.255 area ? <0-4294967295> OSPF area ID as a decimal value A.B.C.D OSPF area ID in IP address format r1(config-router)#network 10.10.10.0 0.0.0.255 area 0 ? <cr> r1(config-router)#network 10.10.10.0 0.0.0.255 area 0 r1(config-router)#exit r1(config)#exit r1# %SYS-5-CONFIG_I: Configured from console by console

r1# %LINK-5-CHANGED: Interface Serial1/1, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/1, changed state to up

r1# 00:15:59: %OSPF-5-ADJCHG: Process 111, Nbr 172.16.3.1 on Serial1/1 from LOADING to FULL, Loading Done

查看路由 -------------R1路由表------------- r1#show ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area * - candidate default, U - per-user static route, o - ODR P - periodic downloaded static route

Gateway of last resort is not set

 10.0.0.0/24 is subnetted, 1 subnets

C 10.10.10.0 is directly connected, Serial1/1 20.0.0.0/24 is subnetted, 1 subnets O 20.20.20.0 [110/128] via 10.10.10.2, 00:03:17, Serial1/1 171.16.0.0/24 is subnetted, 3 subnets C 171.16.1.0 is directly connected, Loopback1 C 171.16.2.0 is directly connected, Loopback2 C 171.16.3.0 is directly connected, Loopback3

-------------R2路由表------------- r2#show ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area * - candidate default, U - per-user static route, o - ODR P - periodic downloaded static route

Gateway of last resort is not set

 10.0.0.0/24 is subnetted, 1 subnets

C 10.10.10.0 is directly connected, Serial1/0 20.0.0.0/24 is subnetted, 1 subnets C 20.20.20.0 is directly connected, Serial1/1 172.16.0.0/24 is subnetted, 3 subnets C 172.16.1.0 is directly connected, Loopback1 C 172.16.2.0 is directly connected, Loopback2 C 172.16.3.0 is directly connected, Loopback3

-------------R3路由表------------- r3#show ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area * - candidate default, U - per-user static route, o - ODR P - periodic downloaded static route

Gateway of last resort is not set

 10.0.0.0/24 is subnetted, 1 subnets

O 10.10.10.0 [110/128] via 20.20.20.1, 00:00:12, Serial1/0 20.0.0.0/24 is subnetted, 1 subnets C 20.20.20.0 is directly connected, Serial1/0 173.16.0.0/24 is subnetted, 3 subnets C 173.16.1.0 is directly connected, Loopback1 C 173.16.2.0 is directly connected, Loopback2 C 173.16.3.0 is directly connected, Loopback3

ping测试

-----------r1上ping r3路由------------ r1#ping 173.16.3.1

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 173.16.3.1, timeout is 2 seconds: ..... Success rate is 0 percent (0/5)

r1#ping 20.20.20.2

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 20.20.20.2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 2/5/7 ms

-----------r3上ping r1路由------------ r3#ping 10.10.10.1

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.10.10.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 2/5/7 ms

拓展信息 ----查看ospf接口信息----- r1#show ip ospf interface Serial1/1 is up, line protocol is up Internet address is 10.10.10.1/24, Area 0 Process ID 111, Router ID 171.16.3.1, Network Type POINT-TO-POINT, Cost: 64 Transmit Delay is 1 sec, State POINT-TO-POINT, Priority 0 No designated router on this network No backup designated router on this network Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:04 Index 1/1, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 1 , Adjacent neighbor count is 1 Adjacent with neighbor 172.16.3.1 Suppress hello for 0 neighbor(s)

----查看ospf数据表------ r1#show ip ospf database OSPF Router with ID (171.16.3.1) (Process ID 111)

            Router Link States (Area 0)

Link ID ADV Router Age Seq# Checksum Link count 171.16.3.1 171.16.3.1 1728 0x80000002 0x002c1c 2 172.16.3.1 172.16.3.1 339 0x80000004 0x00b6b3 4 173.16.3.1 173.16.3.1 339 0x80000002 0x00d135 2

-----查看ospf邻居表----- r1#show ip ospf neighbor

Neighbor ID Pri State Dead Time Address Interface 172.16.3.1 0 FULL/ - 00:00:33 10.10.10.2 Serial1/1

------查看ospf路由----- r1#show ip route ospf 20.0.0.0/24 is subnetted, 1 subnets O 20.20.20.0 [110/128] via 10.10.10.2, 00:09:35, Serial1/1