ospf虚拟链路

miaolingzizhzu

R1:
Router#conf t
Router(config)#no ip do loo
Router(config)#line c 0
Router(config-line)#logg syn
Router(config-line)#exec-time 0 0
Router(config-line)#exit
Router(config)#inter lo0
Router(config-if)#ip add 192.168.1.3 255.255.255.0
Router(config-if)#inter lo1
Router(config-if)#ip add 192.168.0.3 255.255.255.0
Router(config-if)#inter s1/1
Router(config-if)#ip add 192.168.244.1 255.255.255.0
Router(config-if)#no shut

Router(config)#router ospf 1
Router(config-router)#network 192.168.1.3 0.0.0.0 area 0
Router(config-router)#network 192.168.0.3 0.0.0.0 area 0
Router(config-router)#network 192.168.224.1  0.0.0.0 area 51
Router(config-router)#area 51 virtual-link 192.168.3.1






R2:
Router#conf t
Router(config)#no ip do loo
Router(config)#line c 0
Router(config-line)#logg syn
Router(config-line)#exec-time 0 0
Router(config-line)#exit
Router(config)#inter lo0
Router(config-if)ip add 192.168.3.1 255.255.255.0
Router(config-if)#inter s1/0
Router(config-if)#ip add 192.168.224.2 255.255.255.0
Router(config-if)#no shut
Router(config-if)#clock rate 64000
Router(config-if)#inter s1/1
Router(config-if)#ip add 192.168.240.1 255.255.255.252
Router(config-if)#no shut
Router(config-if)#clock rate 64000
Router(config)#router ospf 1
Router(config-router)#network 192.168.3.1 0.0.0.0 area 51
Router(config-router)#network 192.168.224.2  0.0.0.0 area 51
Router(config-router)#network 192.168.240.1 0.0.0.0 area 3
Router(config-router)#area 51 virtual-link 192.168.1.3




R3:
Router#conf t
Router(config)#no ip do loo
Router(config)#line c 0
Router(config-line)#logg syn
Router(config-line)#exec-time 0 0
Router(config-line)#exit
Router(config)#inter lo0
Router(config-if)#ip add 192.168.252.1 255.255.255.0
Router(config)#inters1/1
Router(config-if)#ip add 192.168.240.2 255.255.255.252
Router(config-if)#no shut
Router(config)#router ospf 1
Router(config-router)#network 192.168.240.2  0.0.0.0 area 3
Router(config-router)#network 192.168.252.1  0.0.0.0 area 3



实验现象
R3
Router#show 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 192.168.224.0/24 [110/128] via 192.168.240.1, 00:03:26, Serial1/0
     192.168.240.0/24 is variably subnetted, 2 subnets, 2 masks
O       192.168.240.0/30 [110/128] via 192.168.240.1, 00:03:26, Serial1/0
C       192.168.240.0/24 is directly connected, Serial1/0
     192.168.0.0/32 is subnetted, 1 subnets
O IA    192.168.0.3 [110/129] via 192.168.240.1, 00:03:06, Serial1/0
     192.168.1.0/32 is subnetted, 1 subnets
O IA    192.168.1.3 [110/129] via 192.168.240.1, 00:03:07, Serial1/0
C    192.168.252.0/24 is directly connected, Loopback0
     192.168.3.0/32 is subnetted, 1 subnets
O IA    192.168.3.1 [110/65] via 192.168.240.1, 00:03:26, Serial1/0
Router#



R2
Router# show 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    192.168.224.0/24 is directly connected, Serial1/0
     192.168.240.0/24 is variably subnetted, 2 subnets, 2 masks
C       192.168.240.0/30 is directly connected, Serial1/1
O       192.168.240.0/24 [110/128] via 192.168.240.2, 00:03:49, Serial1/1
     192.168.0.0/32 is subnetted, 1 subnets
O       192.168.0.3 [110/65] via 192.168.224.1, 00:03:29, Serial1/0
     192.168.1.0/32 is subnetted, 1 subnets
O       192.168.1.3 [110/65] via 192.168.224.1, 00:03:29, Serial1/0
     192.168.252.0/32 is subnetted, 1 subnets
O       192.168.252.1 [110/65] via 192.168.240.2, 00:03:49, Serial1/1
C    192.168.3.0/24 is directly connected, Loopback0



R1
Router#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    192.168.224.0/24 is directly connected, Serial1/1
     192.168.240.0/24 is variably subnetted, 2 subnets, 2 masks
O IA    192.168.240.0/30 [110/128] via 192.168.224.2, 00:04:01, Serial1/1
O IA    192.168.240.0/24 [110/192] via 192.168.224.2, 00:04:01, Serial1/1
C    192.168.0.0/24 is directly connected, Loopback1
C    192.168.1.0/24 is directly connected, Loopback0
     192.168.252.0/32 is subnetted, 1 subnets
O IA    192.168.252.1 [110/129] via 192.168.224.2, 00:04:01, Serial1/1
     192.168.3.0/32 is subnetted, 1 subnets
O       192.168.3.1 [110/65] via 192.168.224.2, 00:04:11, Serial1/1


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