RIP大实验都是以大实验背景为基础,在其上进行的实验,拓扑图是相同的。
4. RIP大实验4: 边界自动汇总
1) 删除R1上重分布到RIP的缺省路由,R1和R4上通告回环口,但发现R1的回环口:192.168.1.92和 R4的回环口:192.168.1.33却不能互相访问:
R1(config-router)#no redistribute static
R1(config-router)#net 192.168.1.0
R4(config-router)#net 192.168.1.0
2) R4 ping R1的回环口:结果不通
R4#ping 192.168.1.92
Sending 5, 100-byte ICMP Echos to 192.168.1.92, timeout is 2 seconds:
.....
原因是边界自动汇总:R1和R4之间是10.1.134.0网段的,会执行边界汇总,若在同一个主网,就不会自动汇总。
3) 查看R1、R4路由信息,只有直连网段的路由:
R4#sh ip rou
R 3.0.0.0/8 [120/1] via 10.1.134.1, 00:00:10, FastEthernet0/0
10.0.0.0/24 is subnetted, 1 subnets
C 10.1.134.0 is directly connected, FastEthernet0/0
192.168.1.0/27 is subnetted, 1 subnets
C 192.168.1.32 is directly connected, Loopback0
4) R1和R4间配置辅助地址:
R1(config)#int f0/0
R1(config-if)#ip add 192.168.1.1 255.255.255.224 secondary
R4(config)#int f0/0
R4(config-if)#ip add 192.168.1.2 255.255.255.224 secondary
5) R1回环口ping R4回环口:结果通
R1#ping 192.168.1.33 source 192.168.1.92
Sending 5, 100-byte ICMP Echos to 192.168.1.33, timeout is 2 seconds:
Packet sent with a source address of 192.168.1.92
!!!!!
6) R1、R4查看路由表,出现相互的网段信息:
R4#sh ip rou
R 3.0.0.0/8 [120/1] via 192.168.1.1, 00:00:02, FastEthernet0/0
[120/1] via 10.1.134.1, 00:00:02, FastEthernet0/0
10.0.0.0/24 is subnetted, 2 subnets
R 10.0.0.0 [120/1] via 192.168.1.1, 00:00:02, FastEthernet0/0
C 10.1.134.0 is directly connected, FastEthernet0/0
192.168.1.0/27 is subnetted, 3 subnets
R 192.168.1.64 [120/1] via 192.168.1.1, 00:00:02, FastEthernet0/0
C 192.168.1.32 is directly connected, Loopback0
C 192.168.1.0 is directly connected, FastEthernet0/0
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