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1、Ospfstub路由分析如下图所示，R2为ABR路由器，R1将直连路由重分布进ospf，在此主要测试ospfstub以及no-summary等命令的使用技巧。R1(config-router)#doshowrun
2、brouterrouterospf1router-id1.1.1.1redistributeconnectedsubnetsnetwork1.1.1.10.0.0.0area0network192.1.1.10.0.0.0area01.没有配置stub区域，查看R3上的路由R2(config-router)#doshowrun
3、broutero
4、uterospf1router-id2.2.2.2network2.2.2.20.0.0.0area0network192.1.1.20.0.0.0area0network193.1.1.10.0.0.0area1R3(config-router)#doshowiprouteGatewayoflastresortisnotset1.0.0.0/32issubnetted,1subnetsOIA1.1.1.1[110/66]via193.1.1.1,00:00:07,Serial0/02.0.0.0/32issubnetted,1subnetsOIA2.2
5、.2.2[110/65]via193.1.1.1,00:00:07,Serial0/03.0.0.0/32issubnetted,1subnetsC3.3.3.3isdirectlyconnected,Loopback010.0.0.0/24issubnetted,4subnetsOE210.213.4.0[110/20]via193.1.1.1,00:00:07,Serial0/0OE210.213.3.0[110/20]via193.1.1.1,00:00:07,Serial0/0OE210.213.2.0[110/20]via193.1.1.1,0
6、0:00:07,Serial0/0OE210.213.1.0[110/20]via193.1.1.1,00:00:07,Serial0/0193.1.1.0/30issubnetted,1subnetsC193.1.1.0isdirectlyconnected,Serial0/0192.1.1.0/30issubnetted,1subnetsOIA192.1.1.0[110/65]via193.1.1.1,00:00:08,Serial0/0总结：R3可以学到区域内的、区域间的、包括ospf外的路由。1.当R2和R3上将area1上配置为stub区域时R
7、2(config-router)#doshowrun
8、brouterouterospf1router-id2.2.2.2log-adjacency-changesarea1stubnetwork2.2.2.20.0.0.0area0network192.1.1.20.0.0.0area0network193.1.1.10.0.0.0area1R3(config-router)#doshowiprouteGatewayoflastresortis193.1.1.1tonetwork0.0.0.01.0.0.0/32issubnetted,1subnetsO
9、IA1.1.1.1[110/66]via193.1.1.1,00:06:14,Serial0/02.0.0.0/32issubnetted,1subnetsOIA2.2.2.2[110/65]via193.1.1.1,00:06:14,Serial0/03.0.0.0/32issubnetted,1subnetsC3.3.3.3isdirectlyconnected,Loopback0193.1.1.0/30issubnetted,1subnetsC193.1.1.0isdirectlyconnected,Serial0/0192.1.1.0/30iss
10、ubnetted,1subnetsOIA192.1.1.0[110/65]via193.1.1.1,00:06:14,Serial0/0O*IA0.0.0.0/0[110/65]via193.1.1.1,00:06:14,Serial0/0//多了一条默认路由总结：多了一条默认路由，ospf外部路由都消失了，区域内和区域间的路由还在。2.当R2上配置no-summary时，在R3上查看区域路由R2(config-router)#doshowrun
11、brouterouterospf1router-id2.2.2.2log-adjacency-changes
12、area1stubno-summarynetwork2.2.2.20.0.0.0
