RIP的定时器配置.doc

RIP的定时器配置【实验名称】 RIP的定时器配置【实验目的】 掌握RIP中各个定时器的用途，如何修改定时器保证网络的连通。【背景描述】 某企业的广域网连接是一条低速的链路，网络管理员想降低路由协议对链路带宽的消耗，提高带宽的利用率，他决定修改RIP的定时器缺省值，通过增大定时器值来减少路由刷新的频率，进而减少带宽消耗。【实现功能】 通过修改RIP定时器值来减少网络带宽消耗，或者加速网络收敛，加快网络故障恢复。【实验设备】 R1762 (2台)、V35DCE（1根）、V35DTE（1根）、pc机（两台）、交叉线（两跟）【实验拓扑】 【实验步骤】 注：以下实验假定已配置了RIP 路由协议及接口IP地址。第一步：修改路由器Router1上的RIP定时器值Router1#show ip protocols /查看当前的RIP定时器值Routing Protocol is rip Sending updates every 30 seconds, next due in 4 seconds Invalid after 180 seconds, hold down 180, flushed after 240 Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set Default redistribution metric is 5 Redistributing: rip Default version control: send version 1, receive any version Interface Send Recv Key-chain FastEthernet0/0 1 1 2 Serial0/0/1 1 1 2 Routing for Networks: 172.16.0.0 Routing Information Sources: Gateway Distance Last Update 172.16.2.2 120 00:00:03 Distance: (default is 120)Router1(config)# router rip /创建RIP路由进程Router1(config-router)#timers basic 60 360 360 480 /修改路由更新/无效/拒绝/清除时间分别为60，360，360，480（秒） 验证测试：查看修改后的RIP定时器值Router1#show ip protocols /查看当前的RIP定时器值 Routing Protocol is rip Sending updates every 60 seconds, next due in 44 seconds Invalid after 360 seconds, hold down 360, flushed after 480 Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set Default redistribution metric is 5 Redistributing: rip Default version control: send version 1, receive any version Interface Send Recv Key-chain FastEthernet0/0 1 1 2 Serial0/0/1 1 1 2 Routing for Networks: 172.16.0.0 Routing Information Sources: Gateway Distance Last Update 172.16.2.2 120 00:00:23 Distance: (default is 120)第二步：修改路由器Router2上的RIP定时器值Router2#show ip protocols /查看当前的RIP定时器值Routing Protocol is rip Sending updates every 30 seconds, next due in 18 seconds Invalid after 180 seconds, hold down 180, flushed after 240 Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set Default redistribution metric is 5 Redistributing: rip Default version control: send version 1, receive any version Interface Send Recv Key-chain FastEthernet0/0 1 1 2 Serial0/0/1 1 1 2 Routing for Networks: 172.16.0.0 Routing Information Sources: Gateway Distance Last Update 172.16.2.1 120 00:00:07 Distance: (default is 120)Router2(config)# router rip /创建RIP路由进程Router2(config-router)#timers basic 60 360 360 480 /修改路由更新/无效/拒绝/清除时间分别为60，360，360，480（秒）验证测试：查看修改后的RIP定时器值Router2#show ip protocols /查看当前的RIP定时器值 Routing Protocol is rip Sending updates every 60 seconds, next due in 12 seconds Invalid after 360 seconds, hold down 360, flushed after 480 Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set Default redistribution metric is 5 Redistributing: rip Default version control: send version 1, receive any version Interface Send Recv Key-chain FastEthernet0/0 1 1 2 Serial0/0/1 1 1 2 Routing for Networks: 172.16.0.0 Routing Information Sources: Gateway Distance Last Update 172.16.2.1 120 00:00:39 Distance: (default is 120)【注意事项】连接在同一网络中的各个路由器的RIP定时器设置应该一致。一般不建议更改缺省值；RIP定时器的缺省值为：路由更新时间为30s，路由无效时间180s，路由拒绝时间180s，路由清除时间240 ；恢复定时器缺省值用命令no timers basic 。【参考配置】Router1#show running-config /显示路由器Router1的全部配置Building configuration. Current configuration: hostname Router1 interface FastEthernet0/0 ip address 172.16.1.1 255.255.255 interface Serial0/0/1 ip address 172.16.2.1 255.255.255.0 clock rate 64000 interface Serial1 no ip address shutdown voice-port 3router rip timers basic 60 360 360 480 network 172.16.0.0ip classlessline con 0line 1 8line aux 0line vty 0 4 password star loginendRouter2#show running-config /显示路由器Router2的全部配置Current configuration:hostname Router2interface FastEthernet0/0 ip