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1、鸿鹄论坛 实验七实验七 备份中心原理备份中心原理7.17.17.17.1 实验目的：实验目的：实验目的：实验目的：1.掌握备份中心的概念及功能； 2.掌握物理接口作主接口的配置； 3.掌握物理接口作备份接口的配置； 4.掌握逻辑接口作主接口的配置； 5.掌握逻辑接口作备份接口的配置。7.27.27.27.2 实验环境：实验环境：实验环境：实验环境：实验环境一，物理接口作主接口，dialer 口作备份接口。实验组网如下：PCARTARTB S0E0SwitchPCBS0E0SwitchPSTNPSTNPSTNPSTNPSTNPSTNPSTNPSTNmodemmodemS1S1实验环境二，逻辑接口
2、作主接口（帧中继的需电路） ，物理接口作备份接口。实验组网如下：鸿鹄论坛 PCARTARTB S0E0SwitchPCBE0SwitchS1S1 S0 PPPFrame-Relay7.37.37.37.3 实验步骤：实验步骤：实验步骤：实验步骤：7.3.17.3.17.3.17.3.1 物理接口作主接口，物理接口作主接口，dialerdialerdialerdialer 口作备份接口口作备份接口所有接口 （Dialer 口除外） 都可以作主接口， 所有接口都可以作备份接口对主接口进行备份。 主接口还可以拥有多个备份接口，指定各备份接口的优先级来确定谁作为第一备份接口。 下 面我们来完成一个典型
3、的实验，以便我们熟悉、掌握接口备份的配置。该实验使用实验环境 一，路由器的 S0 口通过 modem 和 PSTN 网连接，S1 口直接相连，封装成 PPP。具体实验 步骤如下：1.配置主接口； 2.给主接口指定备份接口； 3.配置备份接口； 4.配置静态路由。配置完成后的配置信息如下：RTA#show running-configNow create configuration.Current configuration!version 1.5.6dialer-listdialer-listdialer-listdialer-list 1 1 1 1 protocolprotocolprot
4、ocolprotocol ipipipip permitpermitpermitpermit鸿鹄论坛 logging consolehostnameRTA!interfaceAux0async mode interactiveencapsulation ppp!interface Ethernet0speed autoduplex autono loopbackipipipip addressaddressaddressaddress 10.110.32.110.110.32.110.110.32.110.110.32.1 255.255.248.0255.255.248.0255.255.2
5、48.0255.255.248.0!interface Serial0physical-layerphysical-layerphysical-layerphysical-layer asyncasyncasyncasyncmodemmodemmodemmodemasyncasyncasyncasync modemodemodemode dedicateddedicateddedicateddedicatedencapsulationencapsulationencapsulationencapsulation ppppppppppppipipipip addressaddressaddres
6、saddress 1.0.0.11.0.0.11.0.0.11.0.0.1 255.255.255.0255.255.255.0255.255.255.0255.255.255.0dialerdialerdialerdialer in-bandin-bandin-bandin-banddialer-groupdialer-groupdialer-groupdialer-group 1 1 1 1dialerdialerdialerdialer mapmapmapmap ipipipip 1.0.0.21.0.0.21.0.0.21.0.0.2 2342234223422342!interfac
7、e Serial1鸿鹄论坛 encapsulation pppbackupbackupbackupbackup interfaceinterfaceinterfaceinterface SerialSerialSerialSerial 0 0 0 0/ / / /指定备份接口指定备份接口ipipipip addressaddressaddressaddress 2.0.0.12.0.0.12.0.0.12.0.0.1 255.255.255.0255.255.255.0255.255.255.0255.255.255.0!exitipipipip routerouterouteroute 10
8、.110.10.010.110.10.010.110.10.010.110.10.0 255.255.255.0255.255.255.0255.255.255.0255.255.255.0 2.0.0.22.0.0.22.0.0.22.0.0.2 preferencepreferencepreferencepreference 60606060ipipipip routerouterouteroute 10.110.10.010.110.10.010.110.10.010.110.10.0 255.255.255.0255.255.255.0255.255.255.0255.255.255.
9、0 1.0.0.21.0.0.21.0.0.21.0.0.2 preferencepreferencepreferencepreference 60606060!endRTB#show running-configNow create configuration.Current configuration!version 1.5.6dialer-listdialer-listdialer-listdialer-list 1 1 1 1 protocolprotocolprotocolprotocol ipipipip permitpermitpermitpermithostname RTB!i
10、nterfaceAux0async mode interactiveencapsulation ppp!interface Ethernet0鸿鹄论坛 speed autoduplex autono loopbackipipipip addressaddressaddressaddress 10.110.10.10010.110.10.10010.110.10.10010.110.10.100 255.255.255.0255.255.255.0255.255.255.0255.255.255.0!interface Serial0physical-layerphysical-layerphy
11、sical-layerphysical-layer asyncasyncasyncasyncmodemmodemmodemmodemasyncasyncasyncasync modemodemodemode dedicateddedicateddedicateddedicatedencapsulationencapsulationencapsulationencapsulation ppppppppppppipipipip addressaddressaddressaddress 1.0.0.21.0.0.21.0.0.21.0.0.2 255.255.255.0255.255.255.025
12、5.255.255.0255.255.255.0dialerdialerdialerdialer in-bandin-bandin-bandin-banddialer-groupdialer-groupdialer-groupdialer-group 1 1 1 1dialerdialerdialerdialer mapmapmapmap ipipipip 1.0.0.11.0.0.11.0.0.11.0.0.1 2342234223422342!interface Serial1encapsulationencapsulationencapsulationencapsulation pppp
13、ppppppppipipipip addressaddressaddressaddress 2.0.0.22.0.0.22.0.0.22.0.0.2 255.255.255.0255.255.255.0255.255.255.0255.255.255.0!exitipipipip routerouterouteroute 10.110.32.010.110.32.010.110.32.010.110.32.0 255.255.248.0255.255.248.0255.255.248.0255.255.248.0 1.0.0.11.0.0.11.0.0.11.0.0.1 preferencep
14、referencepreferencepreference 60606060ipipipip routerouterouteroute 10.110.32.010.110.32.010.110.32.010.110.32.0 255.255.248.0255.255.248.0255.255.248.0255.255.248.0 2.0.0.12.0.0.12.0.0.12.0.0.1 preferencepreferencepreferencepreference 60606060!鸿鹄论坛 end在配置时需要注意的是为主接口指定备份接口只需要在其中一端配置即可， 并且是在主接口配置模式下配
15、置的。同时必须配置静态路由指向不同的下一跳地址。完成上述配置之后， 进 行实验需求验证，首先测试网络是否能相互通信，如果能它是通过那一接口进行通信的， 将 该接口 shutdown 后，有什么现象出现？此时网络能相互通信吗？如果又将刚才的接口 no shutdown 有时什么现象呢？下面是完成上述操作的显示信息：RTA(config-if-Serial1)#ping 10.110.10.100PING 10.110.10.100: 56data bytes, press CTRL_C to breakReply from 10.110.10.100: bytes=56 Sequence=0 t
16、tl=255 time = 27 msReply from 10.110.10.100: bytes=56 Sequence=4 ttl=255 time = 27 ms- 10.110.10.100 ping statistics -5 packets transmitted5 packets received0.00% packet lossround-trip min/avg/max = 27/27/28 msRTA(config-if-Serial1)#shutdownRTA(config-if-Serial1)#shutdownRTA(config-if-Serial1)#shutdownRTA(config-if-Serial1)#shutdown% InterfaceInterfaceInterfaceInterface Serial1Serial1Serial1Serial1 is
