拓扑如下
,
查看R1的OSPF邻居信息
R1#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
2.2.2.2 1 FULL/BDR 00:00:33 12.0.0.2 FastEthernet0/0
查看OSPF的路由
R1#sho 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
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, Loopback1
2.0.0.0/32 is subnetted, 1 subnets
O IA 2.2.2.2 [110/2] via 12.0.0.2, 00:08:30, FastEthernet0/0
3.0.0.0/32 is subnetted, 1 subnets
O IA 3.3.3.3 [110/3] via 12.0.0.2, 00:06:40, FastEthernet0/0
4.0.0.0/32 is subnetted, 1 subnets
O IA 4.4.4.4 [110/4] via 12.0.0.2, 00:00:48, FastEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
C 12.0.0.0 is directly connected, FastEthernet0/0
23.0.0.0/24 is subnetted, 1 subnets
O IA 23.0.0.0 [110/2] via 12.0.0.2, 00:08:40, FastEthernet0/0
34.0.0.0/24 is subnetted, 1 subnets
O IA 34.0.0.0 [110/3] via 12.0.0.2, 00:06:19, FastEthernet0/0
查看R1的链路状态数据库
R1#sho ip ospf database
OSPF Router with ID (1.1.1.1) (Process ID 1)
Router Link States (Area 1)
Link ID ADV Router Age Seq# Checksum Link count
1.1.1.1 1.1.1.1 555 0x80000003 0x006caf 2
2.2.2.2 2.2.2.2 550 0x80000003 0x0051d5 1
Net Link States (Area 1)
Link ID ADV Router Age Seq# Checksum
12.0.0.1 1.1.1.1 555 0x80000001 0x00a27c
Summary Net Link States (Area 1)
Link ID ADV Router Age Seq# Checksum
23.0.0.0 2.2.2.2 540 0x80000001 0x002b14
2.2.2.2 2.2.2.2 530 0x80000002 0x00f854
3.3.3.3 2.2.2.2 421 0x80000003 0x00d274
34.0.0.0 2.2.2.2 400 0x80000004 0x009f90
4.4.4.4 2.2.2.2 73 0x80000005 0x00aa95
R1#
Router>en
Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#ho R2
R2(config)#int f0/1
R2(config-if)#ip add 12.0.0.2 255.255.255.0
R2(config-if)#no shu
R2(config-if)#exit
R2(config)#int fastEthernet 0/0
R2(config-if)#ip add 23.0.0.2 255.255.255.0
R2(config-if)#no shu
R2(config)#int lo 0
R2(config-if)#ip add 2.2.2.2 255.255.255.0
R2(config-if)#exit
R2(config)#router ospf 1
R2(config-router)#net 12.0.0.2 0.0.0.0 a 1
R2(config-router)#net 23.0.0.2 0.0.0.0 area 0
R2(config-router)#net 2.2.2.2 0.0.0.0 a 0
R2(config-router)#exit
R2(config)#exit
R2#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
1.1.1.1 1 FULL/DR 00:00:39 12.0.0.1 FastEthernet0/1
3.3.3.3 1 FULL/DR 00:00:39 23.0.0.3 FastEthernet0/0
R2#sho 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
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 [110/2] via 12.0.0.1, 00:14:02, FastEthernet0/1
2.0.0.0/24 is subnetted, 1 subnets
C 2.2.2.0 is directly connected, Loopback0
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [110/2] via 23.0.0.3, 00:11:56, FastEthernet0/0
4.0.0.0/32 is subnetted, 1 subnets
O IA 4.4.4.4 [110/3] via 23.0.0.3, 00:06:04, FastEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
C 12.0.0.0 is directly connected, FastEthernet0/1
23.0.0.0/24 is subnetted, 1 subnets
C 23.0.0.0 is directly connected, FastEthernet0/0
34.0.0.0/24 is subnetted, 1 subnets
O IA 34.0.0.0 [110/2] via 23.0.0.3, 00:11:35, FastEthernet0/0
R2#sho ip ospf database
OSPF Router with ID (2.2.2.2) (Process ID 1)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
2.2.2.2 2.2.2.2 765 0x80000003 0x005e97 2
3.3.3.3 3.3.3.3 708 0x80000004 0x007077 2
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
23.0.0.3 3.3.3.3 765 0x80000001 0x0007fa
Summary Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
12.0.0.0 2.2.2.2 839 0x80000001 0x00ba8f
1.1.1.1 2.2.2.2 839 0x80000002 0x00311f
34.0.0.0 3.3.3.3 703 0x80000001 0x007db2
4.4.4.4 3.3.3.3 372 0x80000002 0x0088b7
Router Link States (Area 1)
Link ID ADV Router Age Seq# Checksum Link count
1.1.1.1 1.1.1.1 849 0x80000003 0x006caf 2
2.2.2.2 2.2.2.2 844 0x80000003 0x0051d5 1
Net Link States (Area 1)
Link ID ADV Router Age Seq# Checksum
12.0.0.1 1.1.1.1 849 0x80000001 0x00a27c
Summary Net Link States (Area 1)
Link ID ADV Router Age Seq# Checksum
23.0.0.0 2.2.2.2 835 0x80000001 0x002b14
2.2.2.2 2.2.2.2 825 0x80000002 0x00f854
3.3.3.3 2.2.2.2 716 0x80000003 0x00d274
34.0.0.0 2.2.2.2 694 0x80000004 0x009f90
4.4.4.4 2.2.2.2 368 0x80000005 0x00aa95
R2#
Router>en
Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#ho R3
R3(config)#int fastEthernet 0/1
R3(config-if)#ip add 23.0.0.3 255.255.255.0
R3(config-if)#no shu
R3(config-if)#exit
R3(config)#int fastEthernet 0/0
R3(config-if)#ip add 34.0.00.3 255.255.255.0
R3(config-if)#no shu
R3(config-if)#exit
R3(config)#int lo 0
R3(config-if)#ip ad 3.3.3.3 255.255.255.0
R3(config-if)#no shu
R3(config-if)#exit
R3(config)#router ospf 1
R3(config-router)#net 23.0.0.3 0.0.0.0 a 0
R3(config-router)#network 3.3.3.3 0.0.0.0 a 0
R3(config-router)#network 34.0.0.3 0.0.0.0 a 2
R3(config-router)#exit
R3(config)#exit
R3#sho ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
2.2.2.2 1 FULL/BDR 00:00:38 23.0.0.2 FastEthernet0/1
4.4.4.4 1 FULL/BDR 00:00:33 34.0.0.4 FastEthernet0/0
R3#sho ip ospf database
OSPF Router with ID (3.3.3.3) (Process ID 1)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
2.2.2.2 2.2.2.2 927 0x80000003 0x005e97 2
3.3.3.3 3.3.3.3 870 0x80000004 0x007077 2
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
23.0.0.3 3.3.3.3 927 0x80000001 0x0007fa
Summary Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
12.0.0.0 2.2.2.2 1001 0x80000001 0x00ba8f
1.1.1.1 2.2.2.2 1001 0x80000002 0x00311f
34.0.0.0 3.3.3.3 865 0x80000001 0x007db2
4.4.4.4 3.3.3.3 534 0x80000002 0x0088b7
Router Link States (Area 2)
Link ID ADV Router Age Seq# Checksum Link count
3.3.3.3 3.3.3.3 539 0x80000002 0x00b63a 1
4.4.4.4 4.4.4.4 539 0x80000004 0x0003c2 2
Net Link States (Area 2)
Link ID ADV Router Age Seq# Checksum
34.0.0.3 3.3.3.3 539 0x80000001 0x000cd5
Summary Net Link States (Area 2)
Link ID ADV Router Age Seq# Checksum
23.0.0.0 3.3.3.3 866 0x80000001 0x000d2e
3.3.3.3 3.3.3.3 866 0x80000002 0x00ac98
2.2.2.2 3.3.3.3 866 0x80000003 0x00e264
12.0.0.0 3.3.3.3 866 0x80000004 0x00a0a1
1.1.1.1 3.3.3.3 866 0x80000005 0x001731
R3#sho 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
1.0.0.0/32 is subnetted, 1 subnets
O IA 1.1.1.1 [110/3] via 23.0.0.2, 00:15:42, FastEthernet0/1
2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2 [110/2] via 23.0.0.2, 00:15:42, FastEthernet0/1
3.0.0.0/24 is subnetted, 1 subnets
C 3.3.3.0 is directly connected, Loopback0
4.0.0.0/32 is subnetted, 1 subnets
O 4.4.4.4 [110/2] via 34.0.0.4, 00:09:09, FastEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
O IA 12.0.0.0 [110/2] via 23.0.0.2, 00:15:42, FastEthernet0/1
23.0.0.0/24 is subnetted, 1 subnets
C 23.0.0.0 is directly connected, FastEthernet0/1
34.0.0.0/24 is subnetted, 1 subnets
C 34.0.0.0 is directly connected, FastEthernet0/0
R3#
Router>en
Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#ho R4
R4(config)#interface FastEthernet0/1
R4(config-if)#ip add 34.0.0.4 255.255.255.0
R4(config-if)#no shutdown
R4(config-if)#exit
R4(config)#router ospf 1
R4(config-router)#network 34.0.0.4 0.0.0.0 a 2
R4(config-router)#net 4.4.4.4 0.0.0.0 a 2
R4(config-router)#exit
R4(config)#exit
R4#sho ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
3.3.3.3 1 FULL/DR 00:00:37 34.0.0.3 FastEthernet0/1
R4#sho 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
1.0.0.0/32 is subnetted, 1 subnets
O IA 1.1.1.1 [110/4] via 34.0.0.3, 00:00:18, FastEthernet0/1
2.0.0.0/32 is subnetted, 1 subnets
O IA 2.2.2.2 [110/3] via 34.0.0.3, 00:00:18, FastEthernet0/1
3.0.0.0/32 is subnetted, 1 subnets
O IA 3.3.3.3 [110/2] via 34.0.0.3, 00:00:18, FastEthernet0/1
4.0.0.0/24 is subnetted, 1 subnets
C 4.4.4.0 is directly connected, Loopback0
12.0.0.0/24 is subnetted, 1 subnets
O IA 12.0.0.0 [110/3] via 34.0.0.3, 00:00:18, FastEthernet0/1
23.0.0.0/24 is subnetted, 1 subnets
O IA 23.0.0.0 [110/2] via 34.0.0.3, 00:00:18, FastEthernet0/1
34.0.0.0/24 is subnetted, 1 subnets
C 34.0.0.0 is directly connected, FastEthernet0/1
R4#sho ip ospf database
OSPF Router with ID (4.4.4.4) (Process ID 1)
Router Link States (Area 2)
Link ID ADV Router Age Seq# Checksum Link count
4.4.4.4 4.4.4.4 788 0x80000004 0x0003c2 2
3.3.3.3 3.3.3.3 788 0x80000002 0x00b63a 1
Net Link States (Area 2)
Link ID ADV Router Age Seq# Checksum
34.0.0.3 3.3.3.3 788 0x80000001 0x000cd5
Summary Net Link States (Area 2)
Link ID ADV Router Age Seq# Checksum
23.0.0.0 3.3.3.3 1115 0x80000001 0x000d2e
3.3.3.3 3.3.3.3 1115 0x80000002 0x00ac98
2.2.2.2 3.3.3.3 1115 0x80000003 0x00e264
12.0.0.0 3.3.3.3 1115 0x80000004 0x00a0a1
1.1.1.1 3.3.3.3 1115 0x80000005 0x001731
R4#
实验小结:OSPF的多区域配置,通过对每个路由器路由表,OSPF邻居,OSPF数据库的查看,对OSPFDR和BDR选举,个区域路由信息,以及OSPF有了更深刻的认识。