OSPF外部路由汇总

拓扑图

 

实验过程

1.       R1的预配置

Router>en Router#config t Enter configuration commands, one per line.  End with CNTL/Z. Router(config)#no ip domain-lookup Router(config)#line console 0 Router(config-line)#no exec-timeout Router(config-line)#loggin syn Router(config-line)#exit Router(config)#host  R1 R1(config)#int lo0 R1(config-if)#ip add 10.1.1.1 255.255.255.0 R1(config-if)#int lo1 R1(config-if)#ip add 10.1.2.1 255.255.255.0 R1(config-if)#int s0/0 R1(config-if)#no shut R1(config-if)#ip add 192.168.1.1 255.255.255.252 R1(config-if)#exit

2.       R2的预配置

Router>en Router#config t Enter configuration commands, one per line.  End with CNTL/Z. Router(config)#no ip domain-lookup Router(config)#line console 0 Router(config-line)#no exec-timeout Router(config-line)#loggin syn Router(config-line)#exit Router(config)#host  R2 R2(config)#int s0/0 R2(config-if)#no shut R2(config-if)#ip add 192.168.1.2 255.255.255.252 R2(config-if)#int s0/1 R2(config-if)#no shut R2(config-if)#ip add 192.168.1.5 255.255.255.252 R2(config-if)#exit

3.       R3的预配置

Router>en Router#config t Enter configuration commands, one per line.  End with CNTL/Z. Router(config)#no ip domain-lookup Router(config)#line console 0 Router(config-line)#no exec-timeout Router(config-line)#loggin syn Router(config-line)#exit Router(config)#host  R3 R3(config)#int s0/1 R3(config-if)#no shut R3(config-if)#ip add 192.168.1.6 255.255.255.252 R3(config-if)#int s0/2 R3(config-if)#no shut R3(config-if)#ip add 172.16.1.1 255.255.255.0 R3(config-if)#exit

4.       R4的预配置

Router>en Router#config t Enter configuration commands, one per line.  End with CNTL/Z. Router(config)#no ip domain-lookup Router(config)#line console 0 Router(config-line)#no exec-timeout Router(config-line)#loggin syn Router(config-line)#exit Router(config)#host  R4 R4(config)#int s0/2 R4(config-if)#no shut R4(config-if)#ip add 172.16.1.2 255.255.255.0 R4(config-if)#int lo0 R4(config-if)#ip add 172.16.2.1 255.255.255.0 R4(config-if)#int lo1 R4(config-if)#ip add 172.16.3.1 255.255.255.0 R4(config-if)#exit

5.       R1的OSPF配置

R1(config)#router ospf 1 R1(config-router)#router-id 1.1.1.1 R1(config-router)#net 192.168.1.1 0.0.0.0 area 1 R1(config-router)#net 10.1.1.1 0.0.0.0 area 1 R1(config-router)#net 10.1.2.1 0.0.0.0 area 1 R1(config-router)#end

6.       R2的OSPF配置

R2(config)#router ospf 1 R2(config-router)#router-id 2.2.2.2 R2(config-router)#net 192.168.1.2 0.0.0.0 area 1 R2(config-router)#net 192.168.1.5 0.0.0.0 area 0 R2(config-router)#end

7.       R3的OSPF和RIP配置

R3(config)#router ospf 1 R3(config-router)#router-id 3.3.3.3 R3(config-router)#net 192.168.1.6 0.0.0.0 area 0 R3(config-router)#exit R3(config)#router rip R3(config-router)#version 2 R3(config-router)#no auto R3(config-router)#net 172.16.0.0 R3(config-router)#end

8.       R4的RIP配置

R4(config)#router rip R4(config-router)#version 2 R4(config-router)#no auto R4(config-router)#net 172.16.0.0 R4(config-router)#end

9.       在R3上配置重分布

R3(config)#router ospf 1 R3(config-router)#redistribute rip metric 100  subnet R3(config-router)#exit R3(config)#router rip R3(config-router)#redistribute ospf 1 metric 10 R3(config-router)#end

10.   查看R1的链路状态数据库

R1#show ip ospf da               OSPF Router with ID (1.1.1.1) (Process ID 1)                   Router Link States (Area 1)  //LSA 1   Link ID         ADV Router      Age         Seq#       Checksum Link count 1.1.1.1         1.1.1.1         50          0x80000005 0x000878 4 2.2.2.2         2.2.2.2         51          0x80000001 0x006E4D 2                   Summary Net Link States (Area 1)  //LSA 3   Link ID         ADV Router      Age         Seq#       Checksum 192.168.1.4     2.2.2.2         52          0x80000001 0x00D8B0                   Summary ASB Link States (Area 1)  //LSA 4   Link ID         ADV Router      Age         Seq#       Checksum 3.3.3.3         2.2.2.2         52          0x80000001 0x0037B0                   Type-5 AS External Link States  //LSA 5   Link ID         ADV Router      Age         Seq#       Checksum Tag 172.16.1.0      3.3.3.3         285         0x80000002 0x001E67 0 172.16.2.0      3.3.3.3         285         0x80000002 0x001371 0 172.16.3.0      3.3.3.3         291         0x80000002 0x00087B 0

11.   查看R1的路由表

R1#show ip route ospf      172.16.0.0/24 is subnetted, 3 subnets O E2    172.16.1.0 [110/100] via 192.168.1.2, 00:02:51, Serial0/0 O E2    172.16.2.0 [110/100] via 192.168.1.2, 00:02:51, Serial0/0 O E2    172.16.3.0 [110/100] via 192.168.1.2, 00:02:51, Serial0/0      192.168.1.0/30 is subnetted, 2 subnets O IA    192.168.1.4 [110/128] via 192.168.1.2, 00:02:51, Serial0/0

O IA为外部区域的路由，O E2为重发布进来的路由。

 

12.   测试连通性

R1# R1#ping 172.16.2.1   Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.2.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 28/52/88 ms R1#ping 172.16.3.1   Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.3.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 24/64/108 ms

13.   在R3上对外部网络进行汇总

R3(config)#router ospf 1 R3(config-router)#summary-address 172.16.2.0 255.255.252.0  //区域外部汇总用summary命令 R3(config-router)#end

14.   查看R1的链路状态数据库

R1#show ip ospf da               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         761         0x80000005 0x000878 4 2.2.2.2         2.2.2.2         762         0x80000001 0x006E4D 2                   Summary Net Link States (Area 1)   Link ID         ADV Router      Age         Seq#       Checksum 192.168.1.4     2.2.2.2         763         0x80000001 0x00D8B0                   Summary ASB Link States (Area 1)   Link ID         ADV Router      Age         Seq#       Checksum 3.3.3.3         2.2.2.2         763         0x80000001 0x0037B0                   Type-5 AS External Link States   Link ID         ADV Router      Age         Seq#       Checksum Tag 172.16.0.0      3.3.3.3         24          0x80000001 0x001C6E 0

15.   查看R1的路由表

R1#show ip route ospf      172.16.0.0/22 is subnetted, 1 subnets O E2    172.16.0.0 [110/100] via 192.168.1.2, 00:03:11, Serial0/0      192.168.1.0/30 is subnetted, 2 subnets O IA    192.168.1.4 [110/128] via 192.168.1.2, 00:15:26, Serial0/0

16.   再次测试连通性

R1#ping 172.16.2.1   Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.2.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 16/65/148 ms R1#ping 172.16.3.1   Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.3.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 40/69/144 ms