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| 在不使用动态路由协议的情况下,在IOS123-8以上版本中实现使用ISDN备份FR! [原创] frank_sun (普通用户) 发贴数: 10 2005-09-27 09:42 1.前提:在不使用动态路由协议的情况下 2.问题背景:在FR网络中一端DTE设备显示LINE PROTOCOL DOWN;而另一端仍显示LINE PROTOCOL UP,无法动态的进行主备路由的切换. 3.解决办法:使用CISCO IOS 种新的功能:通过PING方式监控对端某一地址的联通性,动态的启用或删除某一静态路由.实现主备路由的切换. 实际示例(仅供参考) 核心端主要配置: core# username SHNH password 0 cisco track 284 rtr 284 reachability interface LoopBack0 ip address 10.10.1.1 255.255.255.255 interface Serial1/1.3 point-to-point description desc connect to nh bandwidth 128 ip address 9.8.61.85 255.255.255.252 frame-relay interface-dlci 110 interface BRI4/1 description backup for nh bandwidth 128 ip address 9.8.60.85 255.255.255.252 encapsulation ppp dialer map ip 9.8.60.86 name SHNH broadcast dialer load-threshold 80 either dialer-group 1 isdn switch-type basic-net3 no cdp enable ppp authentication chap ppp multilink ip route 9.10.128.0 255.255.224.0 9.8.61.86 60 track 284 ip route 9.10.128.0 255.255.224.0 9.8.60.86 100 rtr 284 type echo protocol ipIcmpEcho 9.8.61.86 source-ipaddr 9.8.61.85 timeout 600 frequency 240 rtr schedule 284 life forever start-time now *********************************************************************************** 分支端主要配置: username core password 0 cisco track 100 rtr 100 reachability interface LoopBack0 ip address 9.10.128.1 255.255.255.255 interface Serial1/1.1 point-to-point description desc connect to core bandwidth 128 ip address 9.8.61.86 255.255.255.252 frame-relay interface-dlci 120 interface BRI4/1 description backup for core bandwidth 128 ip address 9.8.60.86 255.255.255.252 encapsulation ppp dialer map ip 9.8.60.85 name core 9999 dialer load-threshold 80 either dialer-group 1 isdn switch-type basic-net3 no cdp enable ppp authentication chap ppp multilink ip route 0.0.0.0 0.0.0.0 9.8.61.85 60 track 100 ip route 0.0.0.0 0.0.0.0 9.8.60.85 100 rtr 100 type echo protocol ipIcmpEcho 9.8.61.86 source-ipaddr 9.8.61.85 timeout 600 frequency 240 rtr schedule 100 life forever start-time now ip route-static 0.0.0.0 0.0.0.0 9.8.61.85 preference 40 detect-group 1 ip route-static 0.0.0.0 0.0.0.0 9.8.60.85 preference 100 : |