第1段：配置RIP协议 R1#conft Enter configuration commands, one per line. End with CNTL/Z. R1(config)#router rip R1(config-router)#eetwork 172.16.0.0 R1(config-router)# Term_Server>2 [Resuming connection 2 to R2 ...] R2#conft Enter configuration commands, one per line. End with CNTT ./Z R2(config)#router rip R2(config-router)#network 172.16.0.0 R2(config-router)# Term_Server>3 [Resuming connection 3 to R3 ...] R3#conft Enter configuration commands, one per line. End with CNTL/Z. R3(config)#router rip R3(config-router)#network 172.16.0.0 R3(config-router)# 第2段：查看路由表 Term_Server> 1 [Resuming connection I to R1... ] R1(config-router)#end R1#sh ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, 0 - OSPF, IA - OSPF inter area N - 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
172.16.0.0/24 is subnetted, 6 subnets R 172.16.23.0[20/1]via 172.16.12.2,00:00:06,Serial0 [20/1]via 172.16.13.3,00:00:07,Serial1 C 172.16.12.0 is directly connected, Serial0 C 172.16.13.0 is directly connected. Serial1 C 172.16.1.0 is directly connected, Ethernet0 R 172.16.2.0[20/1]via 172.16.12.2,00:00:06,Serial0 R 172.16.3.0[20/1]via 172.16.13.3,00:00:07,Serial1 R1# Term_Server>2 [Resuming connection 2 to R2 ... ] R2(config-router)#end R2#sh ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M " mobile, B - BGP D - EIGRP, EX - EIGRP external, 0 - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type I, 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
172.16.0.0/24 is subnetted, 6 subnets C 172.16.23.0 is directly connected, Seriall C 172.16.12.0 is directly connected, SerialO R 172.16.13.0[20/1]via 172.16.12.1,00:00:08,Serial0 [20/1]via 172.16.23.3,00:00:09,Serial1 R 172.16.1.0[20/1]via 172.16.12.1,00:00:08,Serial0 C 172.16.2.0 is directly connected, Ethernet0 R 172.16.3.0[20/1]via 172.16.23.3,00:00:09,Serial1 R2# Term_Server>3 [Resuming connection 3 to R3 ... ]
R3(config-.router)#end R3#sh ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX -EIGRP external, 0 - 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
172.16.0.0/24 is subnetted, 6 subnets C 172.16.23.0 is directly connected, Serial1 R 172.16.12.0 [120/13 via 172.16.13.1, 00:00:17, Serial0 [120/1} via 172.16.23.2, 00:00:26, Serial1 C 172.16.13.0 is directly connected, SerialO R 172.16.1.0 [120/1] via 172.16.13.1, 00:00:17, Serial0 R 172.16.2,0 [120/1] via 172.16.23.2,00:00:26, Serial1 C 172.16.3.0 is directly connected, Ethemet0 R3#
监测清单5-1 RIP协议常用监测命令 R3#sh ip PRotocol Routing Protocol is "rip" Sending updates every 30 seconds, next due in 24 second Invalid after 180 seconds, hold down 180, flushed after 240 Outgoing update filter list for all interfaces is Incoming update filter list for all interfaces is Redistributing: rip Default version control: send version 1, receive any version Interface Send Recv Triggered TIP Key-chain Ethernet0 1 12 Serial0 1 12 Serial1 1 12 Autonaatic network sunamarization is in effect Routing for Networks: 172.16.0.0 Routing Information Sources: Gateway Distance Last Update 172.16.23.2 120 00:00:14 172.16.13.1 120 00:00:00 Distance: (default is 120) R3#pmg 172.16.1.1
Type escape sequence to abort. Sending 5, 100-bytelCMPEchos to 172.16.1.1,timeout is 2 seconds: !!!!! SUCcess rate is 100 percent (5/5), rouad-tripmin/avg/max=8/8/8 ms R3#trace 172.16.1.1
Type escape sequence to abort. Tracing the route to 172.16.1.1 1 172.16.13.14 msec * R3#conft Enter configuration commands, one per line. End with CNTL/Z. R3(config)#int s1 R3(config-if)#shut R3(config-if)#end R3#sh ip route Codes: C - connecte-IS inter area * - candidate default, U - per-user static route, o - ODR P - periodic downloaded static route
Gateway of last resort is not set
172.16.0.0/24 is subnetted, 5 subnets R 172.16.12.0 [120/1] via 172.16.13.1, 00:00:04, Serial0 C 172.16.13.0 is directly connected, Serial0 R 172.16.1.0 [120/1] via 172.16.13.1, 00:00:04, Serial0 R 172.16.2.0 (.120/21 via 17246.13.1, 00:00:04,Serial0 C 172.16.3.01s directly connected, Ethernet0 R3#trace 172.16.2.2
Type escape sequence to abort. Tracing the route to 172.16.2.2
1 172.16.13.14 msec 4 msec 8 msec 2 172.16.12.2 16 msec 8 msec* R3#conft Enter configuration commands,one per line.End with CNTL/Z. R3(config)#int s1 R3(ocnfig-if)#no sh R3(config-if)#exit R3(config)#logg con R3(config)#exit R3#de 01:29:45:%SYS-5CONFIG_I:Configured from console by console R3:debug ip rip RIP protocol debugging is on R3# 01:29:56:RIP:sending v1 update to 255.255.255.255 via Ethernet0(172.16.3.3) 01:29:56:RIP:build update entries 01:29:56: subnet 172.16.1.0 metric 2 01:29:56: subnet 172.16.2.0 metric 2 01:29:56: subnet 172.16.12.0 metric 2 01:29:56: subnet 172.16.13.0 metric 1 01:29:56: subnet 172.16.23.0 metric 1 01:29:56: RIP: sending v1 update to 255.255.255.255 via Serial0 (172.16.13.3) 01:29:56: RIP: build update entries 01:29:56: subnet 172.16.2.0 metric 2 01:29:56: subnet 172.16.3.0 metric 1 01:29:56: subnet 172.16.23.0 metric 1 01:29:56: RIP: sending v1 update to 255.255.255.255 via Serial1 (172.16.23.3) 01:29:56: RIP: build update entries 01:29:56: subnet 172.16.1.0 metric 2 01:29:56: subnet 172.16.3.0 metric 1 01:29:56: subnet 172.16.13.0 metric 1 01:30:00: RIP: received v1 update from 172.16.23.2 on Serial1 01:30:00: 172.16.1.0 in 2 hops 01:30:00: 172.16.2.0 in 1 hops 01:30:00: 172.16.12.0 in 1 hops R3# 01:30:07: RIP: received v1 update from 172.16.13.1 on Serial0 01:30:07: 172.16.1.0 in 1 hops 01:30:07: 172.16.2.0 in 2 hops 01:30:07: 172.16.12.0 in 1 hops R3-#indebug all
(1)show ip protocol命令的执行结果中包含了有关RIP协议的大量信息，主要有:各种计时器信息; 版本信息，发送version 1，接收任何version; 各接口的发送(Send)和接收(Receive)的版本; 自动汇总生效(Automatic network summarization is in effect); 所路由的网络，172.16.0.0; 路由信息源，即从何处学月来的路由; 治理距离，缺省值为120。 (2)用ping和trace命令测试网络连通性，尤其是trace命令给出了相应的路径信息。 (3)我们把R3路由器的S1接口关闭后，使用show ip route指令查看路由表，显示到达172.16.2.0的路由己经变为R1，度量值也变为2. trace命令的结果也显示了这一变化。 (4)使用debug ip rip命令可以监测到RIP协议的路由更新发送和接收情况，在此命令后面的若干行中，可以看出RIP协议工作的特点，大致有以下几点: 更新信息缺省情况下向所有参与路由的接口发送; RIP版木1的更新包是广播包，即目的地址为255.255.255.255; RIP把整个路由表向相邻路由器发送; 当前所有接口发送和接收的RIP更新包的版本均为1。 (5)最后应关闭debug进程。
