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OSPF手工汇总:区域间汇总、外部路由汇总1.实验目的通过本实验可以掌握:(1)路由汇总的目的(2)区域间路由汇总(3)外部自治系统路由汇总2.实验拓扑本实验的拓扑结构如图7-3所示。图7-3OSPF手工汇总路由器R1、R2和R3之间运行OSPF,路由器R3和R4之间运行RIPv2,路由器R1上的四个环回接口是为在路由器R2上做区域间路由汇总准备的,路由器R4上的四个环回接口是为在路由器R3上做外部路由汇总准备的。由于路由器R3是边界路由器,所以要完成双向 重分LcO;1-1-4.124Lo0:4.4.0.4-24Lo1:4A 14-24sOCOsOOdLO 1:11,5.1-24192/16C.23.0-24LO2:11A1 24LO 3:1.1,7,1-24L*3:4.4J,4-24http:毘加mb.旧朮GB.com布。3.实验步骤(1)步骤1:配置路由器R1R1(config)#routerospf1R1(config-router)#router-id1.1.1.1R1(config-router)#network1.1.4.0 0.0.0.255 area1R1(config-router)#network1.1.5.0 0.0.0.255 area1R1(config-router)#network1.1.6.0 0.0.0.255 area1R1(config-router)#network1.1.7.00.0.0.255 area1R1(config-router)#network 192.168.12.0 0.0.0.255 area1(2)步骤2:配置路由器R2R2(config)#routerospf1R2(config-router)#router-id2.2.2.2R2(config-router)#network192.168.12.0 0.0.0.255 area1R2(config-router)#network192.168.23.0 0.0.0.255 area0R2(config-router)#network2.2.2.0 0.0.0.255 area0R2(config-router)#area 1 range 1.1.4.0 255.255.252.0 由汇总由汇总3)步骤3:配置路由器R3R3(config)#routerospf1R3(config-router)#router-id3.3.3.3/配置区域间路配置区域间路R3(config-router)#network3.3.3.00.0.0.255area0R3(config-router)#network192.168.23.00.0.0.255area0R3(config-router)#summary-address 4.4.0.0 255.255.252.0/配置外部自治系统路由汇总R3(config-router)#redistributeripsubnets/将RIP路由重分布到OSPF中R3(config)#routerripR3(config-router)#version2R3(config-router)#noauto-summaryR3(config-router)#network192.168.34.0R3(config-router)#redistributeospf1metric2/将OSPF路由重分布到RIP中(4)步骤4:配置路由器R4R4(config)#routerripR4(config-router)#version2R4(config-router)#noauto-summaryR4(config-router)#network4.0.0.0R4(config-router)#network192.168.34.0【技术要点】(1)区域间路由汇总必须在区域间路由汇总必须在 ABR 上完成;上完成;(2)外部路由汇总必须在外部路由汇总必须在 ASBR 上完成。上完成。4.实验调试1)在R2上查看路由表,显示如下:R2#showiprouteospf1.0.0.0/8isvariablysubnetted,5subnets,3masksO1.1.5.1/32110/65via192.168.12.1,00:17:16,Serial0/0/0O1.1.4.0/24110/65via192.168.12.1,00:17:16,Serial0/0/0O1.1.4.0/22isasummary,00:17:16,Null0O1.1.7.1/32110/65via192.168.12.1,00:17:16,Serial0/0/0O1.1.6.1/32110/65via192.168.12.1,00:17:16,Serial0/0/03.0.0.0/24issubnetted,1subnetsO3.3.3.0110/65via192.168.23.3,00:12:14,Serial0/0/14.0.0.0/22issubnetted,1subnetsOE24.4.0.0110/20via192.168.23.3,00:11:09,Serial0/0/1OE2192.168.34.0/24110/20via192.168.23.3,00:12:15,Serial0/0/1以上输出表明R2对R1的四条环回接口的路由汇总后,会产生一条指向Null0的路由;同时收到经路由器R3汇总的路由因为是重分布进来的外部路由,斤以路由代码为OE2”(2)在R3上查看路由表,显示如下:R3#showiprouteospfOIA192.168.12.0/24110/128via192.168.23.2,00:23:20,Serial0/0/11.0.0.0/22issubnetted,1subnetsOIA1.1.4.0110/129via192.168.23.2,00:23:20,Serial0/0/12.0.0.0/24issubnetted,1subnetsO2.2.2.0110/65via192.168.23.2,00:23:20,Serial0/0/14.0.0.0/8isvariablysubnetted,5subnets,2masksO4.4.0.0/22isasummary,00:20:29,Null0以上输出表明R3对四条环回接口的RIP路由汇总后,会产生一条指向Null0的路由;同时收到经路由器R2汇总的路由,由于是区域间路由汇总,所以路由代码为“OIA”。
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