【CCNP】BGP联盟配置案例【CCNP】BGP联盟配置案例.docx

【CCNP】BGP联盟配置案例版本V1.0密级开放内部机密类型讨论版测试版正式版修订记录修订日期修订人版本号审核人修订说明2012-11-21Jeff1.0Jeff正式发布案例配置拓扑案例配置需求如上图所示，IP地址规划方面，R2上有一环回接口loopback 200，地址为/32，R5上有一环回接口loopback 100，地址为/32，路由器互连的接口为172.8.AB.X/24（其中AB为路由器编号叠加，X为路由器编号，如R1连接R2的接口S0/0的地址为/24）如图所示，联盟AS 100中有两个子AS，它们分别为AS 65501、AS 65502，配置R1与R2行成联盟iBGP邻居关系，R2与R3之间行成联盟eBGP邻居关系，R3与R4行成联盟iBGP邻居关系，R3与R5形成eBGP邻居关系，采用物理接口配置邻居建立；将R2的loopback 200、R5的loopback 100接口宣告到相应的BGP中，观察联盟内部的特征；案例配置思路R1上的关键配置：router bgp 65501 /联盟子AS/ no synchronization bgp log-neighbor-changes bgp confederation identifier 100 /指定对联盟外呈现的AS/雏鹰论坛CCNP neighbor remote-as 65501 no auto-summaryR2上的关键配置：router bgp 65501 no synchronization bgp log-neighbor-changes bgp confederation identifier 100 bgp confederation peers 65502 /指定联盟内部eBGP邻居关系的邻居AS/ network mask 55 neighbor remote-as 65501 neighbor remote-as 65502 no auto-summaryR3上的关键配置：router bgp 65502 no synchronization bgp log-neighbor-changes bgp confederation identifier 100 bgp confederation peers 65501 neighbor remote-as 65501 neighbor remote-as 65502 neighbor remote-as 200 no auto-summaryR4上的关键配置：router bgp 65502 no synchronization bgp log-neighbor-changes bgp confederation identifier 100 neighbor remote-as 65502 no auto-summaryR5上的关键配置：router bgp 200 no synchronization bgp log-neighbor-changes network mask 55 neighbor remote-as 100 no auto-summary案例检验结果查看认证后BGP邻居建立的情况：R5#show ip bgp BGP table version is 3, local router ID is Status codes: s suppressed, d damped, h history, * valid, best, i - internal, r RIB-failure, S StaleOrigin codes: i - IGP, e - EGP, ? - incomplete Network Next Hop Metric LocPrf Weight Path* /32 0 32768 i* /32 0 100 i/AS PATH中不包含联盟内部的子AS/R3#show ip bgpBGP table version is 3, local router ID is Status codes: s suppressed, d damped, h history, * valid, best, i - internal, r RIB-failure, S StaleOrigin codes: i - IGP, e - EGP, ? - incomplete雏鹰论坛CCNP Network