静态路由设置实例

本实验的拓扑结构如下图所示。

3台路由器分别命名为R1、R2和R3，所使用的接口和相应的IP地址分配如上图中的标注。图中的"/24"表示子网掩码为24位，即255.255.255.0。 　　实验中，应使用静态路由的设置。实现R2到R3在IP层的连通性，即要求从R2可以ping通R3，反之亦然。END

3台Cisco 808路由器，具有2个以太网接口

2台Hub，4条双绞线 (也可以用2条交叉网线直接把3台路由器连接起来)

1台带有超级终端程序的PC机，以及Console电缆及转接器。

根据拓扑结构图的要求，正确配置各路由器的以太网接口。路由器R1的接口配置如下：　　R1>enable　　R1#config terminal　　R1(config)#interface ethernet 0/0　　R1(config-if)#ip address 10.1.1.1 255.255.255.0　　R1(config-if)#no shutdown　　R1(config-if)#exit　　R1(config)#interface ethernet 0/1　　R1(config-if)#ip address 172.16.1.1 255.255.255.0　　R1(config-if)#no shutdown　　R1(config-if)#end路由器R2的接口配置如下：　　R2>enable　　R2#config terminal　　R2(config)#interface ethernet 0/0　　R2(config-if)#ip address 10.1.1.2 255.255.255.0　　R2(config-if)#no shutdown　　R2(config-if)#end路由器R3的接口配置如下： 　　R3>enable　　R3#config terminal　　R3(config)#interface ethernet 0/0　　R3(config-if)#ip address 172.16.1.3 255.255.255.0　　R3(config-if)#no shutdown　　R3(config-if)#end

测试自身连通性R1#ping 10.1.1.1Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 msR1#ping 172.16.1.1Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.1.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 msR2#ping 10.1.1.2Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 msR3#ping 172.16.1.3Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.1.3, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms

设置路由前测试网络连通性R2#ping 172.16.1.3Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.1.3, timeout is 2 seconds: !!!!! Success rate is 0 percent (0/5)R3#ping 10.1.1.2Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds: !!!!! Success rate is 0 percent (0/5)

检查路由表R1#show ip route Gateway of last resort is not setrout C 10.1.1.0/24 is directly connected, 10.1.1.1 C 172.16.1.0/24 is directly connected, 172.16.1.1R2#show ip route Gateway of last resort is not set C 10.1.1.0/24 is directly connected, 10.1.1.2R3#show ip route Gateway of last resort is not set C 172.16.1.0/24 is directly connected, 172.16.1.3

加入静态路由并测试连通性R2#config terminalR2(config)#ip route 172.16.1.0 255.255.255.0 10.1.1.1R2(config)#endR2#show ip route 　　　　　 C10.1.1.0/24 is directly connected, 10.1.1.2 S　 172.16.1.0/24 [1/0] via 10.1.1.1R2#ping 172.16.1.1Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.1.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 msR2#ping 172.16.1.3Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.1.3, timeout is 2 seconds: !!!!! Success rate is 0 percent (0/5)R3#config terminalR3(config)#ip route 10.1.1.0 255.255.255.0 172.16.1.1R3(config)#endR3#show ip route 　　　　　 C172.16.1.0/24 is directly connected, 172.16.1.3 S　 10.1.1.0/24 [1/0] via 172.16.1.1R3#ping 10.1.1.1

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms

R3#ping 10.1.1.2

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms

R1#show ip route

C 10.1.1.0/24 is directly connected, 10.1.1.1 C 172.16.1.0/24 is directly connected, 172.16.1.1