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对于ospf路由协议的配置，下面的教程共分了五个步骤，包括基本IP通讯、宣告OSPF路由到对应区域、查看路由表、打通虚电路、再次查看路由表。全部的配置命令行都列了出来，供网管参考和学习。
第一步：基本IP通讯！
R1>en
R1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R1(config)#int s0/0
R1(config-if)#no sh
R1(config-if)#ip add 192.168.12.1 255.255.255.0
R1(config-if)#clock rate 64000
R1(config-if)#exit
R1(config)#int s0/1
R1(config-if)#no sh
R1(config-if)#ip add 192.168.13.1 255.255.255.0
R1(config-if)#clock rate 64000
R1(config-if)#exit
R1(config)#
-----------------------
R2>en
R2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R2(config)#int s0/0
R2(config-if)#no sh
R2(config-if)#ip add 192.168.12.2 255.255.255.0
R2(config-if)#exit
R2(config)#int s0/1
R2(config-if)#no sh
R2(config-if)#ip add 192.168.24.2 255.255.255.0
R2(config-if)#clock rate 64000
R2(config-if)#exit
R2(config)#
------------------------
R3>en
R3#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R3(config)#int s0/1
R3(config-if)#no sh
R3(config-if)#ip add 192.168.13.3 255.255.255.0
R3(config-if)#exit
R3(config)#int s0/0
R3(config-if)#no sh
R3(config-if)#ip add 192.168.35.3 255.255.255.0
R3(config-if)#clock rate 64000
R3(config-if)#exit
R3(config)#
-----------------------
R4>en
R4#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R4(config)#int s0/1
R4(config-if)#no sh
R4(config-if)#ip add 192.168.24.4 255.255.255.0
R4(config-if)#exit
R4(config)#
-----------------------
R5>en
R5#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R5(config)#int s0/0
R5(config-if)#no sh
R5(config-if)#ip add 192.168.35.5 255.255.255.0
R5(config-if)#exit
R5(config)#
---------------------
第二步：宣告OSPF路由到对应区域！
R1(config)#router ospf 1 ----这里的“1”不像eigrp里面的一样，这里的是进程号，不需要全部一致！
R1(config-router)#router-id 1.1.1.1
R1(config-router)#net 192.168.12.1 0.0.0.0 area 0 -------区域0（骨干区域）
R1(config-router)#net 192.168.13.1 0.0.0.0 area 13 --------区域13（常规区域）
R1(config-router)#end
R1#
在这里我解释下：除区域0以外全部都是常规区域！
R2(config)#router ospf 1 R2(config-router)#router-id 2.2.2.2
R2(config-router)#net 192.168.12.2 0.0.0.0 area 0
R2(config-router)#net 192.168.24.2 0.0.0.0 area 24
R2(config-router)#end
R2#
-----------------------
R3(config)#router ospf 1
R3(config-router)#router-id 3.3.3.3
R3(config-router)#net 192.168.13.3 0.0.0.0 area 13
R3(config-router)#net 192.168.35.3 0.0.0.0 area 35
R3(config-router)#end
R3#
------------------
R4(config)#router ospf 1
R4(config-router)#router-id 4.4.4.4
R4(config-router)#net 192.168.24.4 0.0.0.0 area 24
R4(config-router)#end
R4#
--------------------------------------------------------------------------------------------------R5(config)#router ospf 1
R5(config-router)#router-id 5.5.5.5
R5(config-router)#net 192.168.35.5 0.0.0.0 area 35
R5(config-router)#end
R5#
第三步：查看路由表！
R1#sh ip route
Codes: C - connected, S - static, 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
i - IS-IS, su - IS-IS summary, 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
C 192.168.12.0/24 is directly connected, Serial0/0
C 192.168.13.0/24 is directly connected, Serial0/1
O IA 192.168.24.0/24 [110/128] via 192.168.12.2, 00:05:25, Serial0/---O IA代表从其他区域学到的路由
R1#
---------------
R2#sh ip route
Codes: C - connected, S - static, 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
i - IS-IS, su - IS-IS summary, 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
C 192.168.12.0/24 is directly connected, Serial0/0
O IA 192.168.13.0/24 [110/128] via 192.168.12.1, 00:04:45, Serial0/0
C 192.168.24.0/24 is directly connected, Serial0/1
R2#
-------------------
R3#sh ip route
Codes: C - connected, S - static, 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
i - IS-IS, su - IS-IS summary, 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
O IA 192.168.12.0/24 [110/128] via 192.168.13.1, 00:04:28, Serial0/1
C 192.168.13.0/24 is directly connected, Serial0/1
O IA 192.168.24.0/24 [110/192] via 192.168.13.1, 00:04:28, Serial0/1
C 192.168.35.0/24 is directly connected, Serial0/0
R3#
-------------------
R4#sh ip route
Codes: C - connected, S - static, 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
i - IS-IS, su - IS-IS summary, 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
O IA 192.168.12.0/24 [110/128] via 192.168.24.2, 00:05:03, Serial0/1
O IA 192.168.13.0/24 [110/192] via 192.168.24.2, 00:05:03, Serial0/1
C 192.168.24.0/24 is directly connected, Serial0/1
R4#
------------
R5#sh ip route
Codes: C - connected, S - static, 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
i - IS-IS, su - IS-IS summary, 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
C 192.168.35.0/24 is directly connected, Serial0/0
R5#
这里可以看出除R5外全部都学到了路由，R5未学到其他路由也未让别人学到它的路由！这是因为常规区域必须都直接连到骨干区域！在显示生活中当然有这种情况，解决办法就是在R1和R3之间打通一条虚电路！
第四步：打通虚电路！
R1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R1(config)#router ospf 1
R1(config-router)#area 13 virtual-link 3.3.3.3
R1(config-router)#end
R1# http://www.luyouqiwang.com/15534/
------------------
R3#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R3(config)#router ospf 1
R3(config-router)#area 13 virtual-link 1.1.1.1
R3(config-router)#end
R3#
第五步：再次查看路由表！
R1#sh ip route
Codes: C - connected, S - static, 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
i - IS-IS, su - IS-IS summary, 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
C 192.168.12.0/24 is directly connected, Serial0/0
C 192.168.13.0/24 is directly connected, Serial0/1
O IA 192.168.24.0/24 [110/128] via 192.168.12.2, 00:01:41, Serial0/0
O IA 192.168.35.0/24 [110/128] via 192.168.13.3, 00:01:41, Serial0/1
R1#
-------------------
R2#sh ip route
Codes: C - connected, S - static, 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
i - IS-IS, su - IS-IS summary, 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
C 192.168.12.0/24 is directly connected, Serial0/0
O IA 192.168.13.0/24 [110/128] via 192.168.12.1, 00:01:41, Serial0/0
C 192.168.24.0/24 is directly connected, Serial0/1
O IA 192.168.35.0/24 [110/192] via 192.168.12.1, 00:01:41, Serial0/0
R2#
-----------------------
-R3#sh ip route
Codes: C - connected, S - static, 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
i - IS-IS, su - IS-IS summary, 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
O 192.168.12.0/24 [110/128] via 192.168.13.1, 00:01:49, Serial0/1
C 192.168.13.0/24 is directly connected, Serial0/1
O IA 192.168.24.0/24 [110/192] via 192.168.13.1, 00:01:49, Serial0/1
C 192.168.35.0/24 is directly connected, Serial0/0
R3#
-------------------
R4#sh ip route
Codes: C - connected, S - static, 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
i - IS-IS, su - IS-IS summary, 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
O IA 192.168.12.0/24 [110/128] via 192.168.24.2, 00:05:04, Serial0/1
O IA 192.168.13.0/24 [110/192] via 192.168.24.2, 00:05:04, Serial0/1
C 192.168.24.0/24 is directly connected, Serial0/1
O IA 192.168.35.0/24 [110/256] via 192.168.24.2, 00:01:53, Serial0/1
R4#
--------------------
R5#sh ip route
Codes: C - connected, S - static, 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
i - IS-IS, su - IS-IS summary, 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
O IA 192.168.12.0/24 [110/192] via 192.168.35.3, 00:01:58, Serial0/0
O IA 192.168.13.0/24 [110/128] via 192.168.35.3, 00:02:14, Serial0/0
O IA 192.168.24.0/24 [110/256] via 192.168.35.3, 00:01:58, Serial0/0
C 192.168.35.0/24 is directly connected, Serial0/0
R5#
这个时候所有路由全部学习到了！
第六步：ping测试！
R4#ping 192.168.12.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.12.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/25/44 ms
R4#ping 192.168.13.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.13.1, timeout is 2 seconds:
!!!!! http://www.luyouqiwang.com/15534/
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/41/64 ms
R4#ping 192.168.35.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.35.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/54/80 ms
R4#ping 192.168.35.5
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.35.5, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/51/88 ms
R4#
到这里又得给各位说再见了，算是告一段落了！这个ospf配置的教程写的不好，谢谢大家的阅览！
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