BGP路由策略与选路控制

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1、BGP路由策略与选路控制一、实验目标：根据BGP路由选择原则，用BGP属性控制BGP路由二、网络拓扑图:普通IBGPL0:10.0.09LO10,CU52/3010.5.5.1/24E3/0IGP>OSPP1Are^0SO/110.0.15.1/3D10.Q.26.1/3010,0.1.1/301OHAS65000…•意迪？?里••坐•軻吧••…1卩1/0IGF：OS帛IArsa0Fl/01.1/3010.5.1.2/30s三、配置:IP地址如图所示用OSPF实现IGP路由可达BGP配置如下：nosynchronizationNoauto-summaryUpdate-sourceloO

2、Next-hop-selfR3和R4为同簇路由反射器，R1,R2分别为R3和R4的客户端R3,R4建立普通IBGP邻居R3,R4都发布10.0.0.0/16,10.2.0.0/16,10.4.0.0/16,10.3.0.0/16到BGPR5,R6发布10.5.0.0/16,10.6.0.0/16到BGPR1与R5,R2与R6建立EBGP现分析下面路由RTl#showipbgpNetworkNextHopMetricLocPrfWeightPath*订0.5.0.0/1610.0.0.20100065001i*>10.0」5.20065001i*il0.6.0.0/1610.0.0.20

3、100065001i*>10.0.15.20065001i根据EBGP路由优先于IBGP路由RTl#showipbgp10.5.0.0BGProutingtableentryfor10.5.0.0/16,version11Paths:(2available,best#2,tableDefault-IP-Routing-Table)Advertisedtoupdateroups:26500110.0.0.2(metric101)from10.0.0.4(10.0.0.4)OriginIGP,metric0,localpref100,valid,internalOriginator:10.

4、0.0.2,Clusterlist:10.0.0.4来口IBGP10.0.0.4反射的路rh6500110.0」5.2from10.0.15.2(10.5.0」)来自EBGP10.0」5.2的路市Origin1GP,metric0,localpref100,valid,external,bestRT2#showipbgpR2同R1NetworkNextHopMetricLocPrfWeightPath*>10.5.0.0/1610.0.26.20065001i*i10.0.0.10100065001i*>10.6.0.0/1610.0.26.20065001i*i10.0.0.1010

5、0065001iRT2#showipbgp10.5.0.0BGProutingtableentryfor10.5.0.0/16,version10Paths:(2available,best#1,tableDefault-IP-Routing-Table)Advertisedtoupdate-groups:26500110.0.26.2from10.0.26.2(10.6.0」)OriginIGP,metric0,localpref100,valid,external,best6500110.0.0」(metric101)from10.0.0.3(10.0.0.3)OriginIGP,

6、metric0,localpref100,valid,internalOriginator:10.0.0.1,Clusterlist:10.0.0.3RT3#showipbgpNetwork*订0.5.0.0/16*i*>i*il0.6.0.0/16NextHop10.0.0.210.0.0.210.0.0.110.0.0.210.0.0.210.0.0.10100065001i0100065001i0100065001i0100065001i0100065001i0100065001iMetricLocPrfWeightPath根据到达下一•跳IGP开销小的RT3#showipbgp

7、10.5.0.0BGProutingtableentryfor10.5.0.0/16,version18Paths:(3available,best#3,tableDefault-IP-Routing-Table)Advertisedtoupdate-groups:1265001,(ReceivedfromaRR-client)10.0.0.2(metric201)from10.0.0.2(10.0.0.2)来自IBGP10.0.0.2Orig