3.6RIP的防环机制.docVIP

3.6 RIP的防环机制 2008-03-09 21:10:54 　标签：毒性逆转 水平分割 16跳 防环 RIP　　　[推送到技术圈] 版权声明：原创作品，允许转载，转载时请务必以超链接形式标明文章 原始出处 、作者信息和本声明。否则将追究法律责任。/325987/64861 ? RIP的防环机制 实验连接图 提要描述 基本配置 R1的配置 R2的配置 ! hostname R1 ! interface Loopback0 ip address ! interface Serial1/0 ip address no shut ! interface Serial1/1 ip address no shut ! router rip network network network ! ! hostname R2 ! interface Serial1/0 ip address no shut ! interface Serial1/1 ip address no shut ! router rip network network ! R3的配置 ! hostname R3 ! interface Serial1/0 ip address no shut ! interface Serial1/1 ip address no shut ! router rip network network ! ↓调试配置及监测步骤↓ !!：请在完成每个分解实验的时候，重启路由器重新配置表格的基本配置，再进行调试。 (一) 记数无穷大，16跳情况 ? ? 操作步骤： 第一步：各个路由器完成基本配置，R2的路由表如下： R2#sh ip route R /8 [120/1] via , 00:00:01, Serial1/0 /24 is subnetted, 1 subnets C is directly connected, Serial1/1 /24 is subnetted, 1 subnets C is directly connected, Serial1/0 R /8 [120/1] via , 00:00:23, Serial1/1 [120/1] via , 00:00:01, Serial1/0 网络是学自R1的 第二步：被动R1的s1/1接口，令R2学到网络A是来自R3，而不是R1， 大约4分钟后，R2的路由表如下： R1(config)#router rip R1(config-router)#passive-interface s1/1 R2#show ip route R /8 [120/2] via , 00:00:06, Serial1/1 /24 is subnetted, 1 subnets C is directly connected, Serial1/1 /24 is subnetted, 1 subnets C is directly connected, Serial1/0 R /8 [120/1] via , 00:00:22, Serial1/1 现在R2学到的网络是来自R3了 第三步：把R1的s1/0的接口也被动掉，且断开lookback0接口。且打开个各个路由器的debug ip rip R1(config)#router rip R1(config-router)#passive-interface s1/0 R1(config)#int loopback 0 R1(config-if)#shutdown 第四步：直到R1收来的网络是来自R2后，再取消R1被动s1/0接口。 R1#sh ip route R /8 [120/3] via , 00:00:01, Serial1/1 R /8 [120/1] via , 00:00:19, Serial1/0 [120/1] via , 00:00:01, Serial1/1 /24 is subnetted, 1 subnets C is directly connected, Serial1/1 /24 is subnetted, 1 subnets C is directly connected, Serial1/0 R1现在的路由表学到的网络是来自R2的 R1(config)#router rip R1(c