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1、微思网络，专注高端实现双出口NAT负载均衡和备份一.实验拓扑物理连接图：TEL:0592-2236681-1-HTTP://WWW.XMWS.CN微思网络，专注高端二.实验目的当网络连接正常时,网段1(172.16.1.0/24)通过ISP_A到达6.6.6.6,网段2(172.16.2.0/24)通过ISP_B到达6.6.6.6,当ISP_A或ISP_B其中一条链路出现故障时,能实现自己切换,以达到备份的目的。TEL:0592-2236681-2-HTTP://WWW.XMWS.CN微思网络，专注
2、高端三.实验步骤1、按以上拓扑的要求配置各路由器的IP地址,其中R4,R5,R6运行OSPFAREA0,地址6.6.6.6用来作为internet的服务器,方便后面的测试所用。配置R3:Ints1/2Ipaddress172.16.1.3255.255.255.0NoshutIntloopback0Ipaddress172.16.2.3255.255.255.0Iproute0.0.0.00.0.0.0172.16.1.7配置R7:interfaceSerial1/0descriptiontoLAN
3、ipaddress172.16.1.7255.255.255.0noshutdowninterfaceSerial1/1descriptiontoISP_Bipaddress75.1.1.7255.255.255.0noshutdowninterfaceSerial1/3descriptiontoISP_Aipaddress74.1.1.7255.255.255.0noshutdown配置R7的路由iproute0.0.0.00.0.0.074.1.1.4iproute0.0.0.00.0.0.07
4、5.1.1.5iproute172.16.2.0255.255.255.0172.16.1.3//到达LAN172.16.2.0/24的回程路由配置R4:interfaceSerial1/1ipaddress46.1.1.4255.255.255.0noshutdowninterfaceSerial1/2ipaddress74.1.1.4255.255.255.0noshutdownrouterospf4network0.0.0.0255.255.255.255area0TEL:0592-22366
5、81-3-HTTP://WWW.XMWS.CN微思网络，专注高端配置R5:interfaceSerial1/1ipaddress56.1.1.5255.255.255.0noshutdowninterfaceSerial1/2ipaddress75.1.1.5255.255.255.0noshutdownrouterospf5network0.0.0.0255.255.255.255area0配置R6:interfaceLoopback0ipaddress6.6.6.6255.255.255.255
6、interfaceSerial1/0ipaddress46.1.1.6255.255.255.0noshutdowninterfaceSerial1/1ipaddress56.1.1.6255.255.255.0noshutrouterospf6network0.0.0.0255.255.255.255area0验证基本配置(R3)R3#showipinterfacebriefInterfaceIP-AddressOK?MethodStatusProtocolFastEthernet0/0unass
7、ignedYESunsetadministrativelydowndownFastEthernet0/1unassignedYESunsetadministrativelydowndownSerial1/0unassignedYESunsetadministrativelydowndownSerial1/1unassignedYESunsetadministrativelydowndownSerial1/2172.16.1.3YESmanualupupSerial1/3unassignedYESun
8、setadministrativelydowndownLoopback0172.16.2.3YESmanualupupR3#showiprouteCodes:C-connected,S-static,R-RIP,M-mobile,B-BGPD-EIGRP,EX-EIGRPexternal,O-OSPF,IA-OSPFinterareaN1-OSPFNSSAexternaltype1,N2-OSPFNSSAexternaltype2E1-OSPFexternaltype
