bgp实例配置 bgp配置命令

Cisco(config)#router bgp 100 //配置BGP进程号
 Cisco(config-router)#bgp router-id 1.1.1.1 //配置BGP的router-id
 Cisco(config-router)#neighbor 12.1.1.2 remote-as 200 //配置BGP邻居
 Cisco(config-router)#neighbor 2.2.2.2 remote 100 //配置IBGP邻居
 Cisco(config-router)#neighbor 2.2.2.2 update-source loopback 0 //指定IBGP的更新源
 Cisco(config-router)#neighbor 2.2.2.2 next-hop-self //在AS边界路由器上配置
 Cisco(config-router)#neighbor 2.2.2.2 ebgp-multihop 2 //配置EBGP跳数为2
 Cisco(config-router)#network 12.1.1.0 mask 255.255.255.0 //宣告有类网络
 Cisco(config-router)#auto-summary //打开自动汇总
 Cisco(config-router)#network 12.0.0.0 //宣告无类网络
 Cisco#show tcp brief //查看TCP连接摘要
 Cisco#show ip bgp neighbors //查看BGP邻居
 Cisco#show ip bgp summary //查看BGP邻居摘要信息
 Cisco#show ip bgp //查看BGP表
 Cisco(config)#router bgp 100
 Cisco(config-router)#neighbor a1 peer-group //定义peer-group
 Cisco(config-router)#neighbor a1 remote-as 200
 Cisco(config-router)#neighbor a1 update-source loopback 0
 Cisco(config-router)#neighbor a1 next-hop-self
 Cisco(config-router)#neighbor a1 distribute-list 20 out
 Cisco(config-router)#neighbor 12.1.1.2 peer-group a1 //引用peer-group
 Cisco(config-router)#bgp listen range 1.1.1.0/24 peer-group a1 //使BGP被动侦听1.1.1.0/24网段的BGP连接请求并动态建立BGP对等体
 Cisco(config-router)#neighbor 12.1.1.2 password abc123 //配置BGP认证，只支持MD5认证
 Cisco#clear ip bgp 12.1.1.2 //硬重置单个邻居
 Cisco#clear ip bgp * //硬重置所有邻居
 Cisco#clear ip bgp * soft //软重置双向的所有邻居
 Cisco#clear ip bgp * soft in //软重置进方向的所有邻居
 Cisco#clear ip bgp * soft out //软重置出方向的所有邻居
 Cisco#show ip bgp neighbors 12.1.1.2 received-routes //从邻居接收到的BGP路由条目
 Cisco#show ip bgp neighbors 12.1.1.2 routes //查看从邻居学到的BGP路由
 Cisco#show ip bgp neighbors 12.1.1.2 advertised-routes //查看发送给邻居的BGP路由条目
 Cisco#show ip bgp rib-failure //查看为加入到RIB的BGP路由以及没有被加载的原因
 Cisco#debug ip bgp updates //查看BGP的update报文
 Cisco(config-router)#bgp default local-preference 100 //修改EBP本地优先级，默认是100，越大越优
 Cisco(config)#ip bgp-community new-format //修改community属性的显示方式
 Cisco(config)#route-map rm1 permit 10
 Cisco(config-route-map)#set community 100:1 //设置community属性值
 Cisco(config-router)#neighbor 12.1.1.2 send-community //发送community属性的值
 Cisco(config-route-map)#match community 1 //匹配community属性值
 Cisco(config-route-map)#match community 1 exact-match //匹配community属性值
 Cisco(config)#ip community-list 1 permit 100:1 // 匹配community属性为100:1
 Cisco(config)#ip community-list 1 permit internet //匹配所有BGP路由
 Cisco(config)#ip community-list standard d1 permit 1 //匹配要删除的community属性值
 Cisco(config)#route-map rm1 permit 10
 Cisco(config-route-map)#set comm-list d1 delete //删除该属性
 Cisco#show ip community-list
 Cisco(config-router)#aggregate-address 172.16.0.0 255.255.0.0 //配置BGP的路由聚合，通告汇总和明细路由
 Cisco(config-router)#aggregate-address 172.16.0.0 255.255.0.0 summary-only //配置BGP的路由聚合，只通告汇总路由，抑制明细路由
 Cisco(config-router)# aggregate-address 172.16.0.0 255.255.0.0 summary-only as-set //配置BGP的路由聚合，只通告汇总路由，抑制明细路由,且继承原有明细路由的AS属性
 Cisco(config)#ip prefix-list p1 permit 172.16.1.0/24
 Cisco(config)#route-map rm1 permit 10
 Cisco(config-route-map)#match ip address prefix-list p1
 Cisco(config)#router bgp 100
 Cisco(config-router)# aggregate-address 172.16.0.0 255.255.0.0 as-set suppress-map rm1 //配置BGP的路由聚合，只通告汇总路由，抑制特定路由,且继承原有明细路由的AS属性
 Cisco(config-router)#neighbor 12.1.1.2 unsuppress-map rm1 //配置BGP的路由聚合时取消对特定路由的抑制
 Cisco(config-router)# aggregate-address 172.16.0.0 255.255.0.0 summary-only as-set
 Cisco(config-router)# aggregate-address 172.16.0.0 255.255.0.0 summary-only as-set advertise-map rm1 //配置BGP的路由聚合时只继承特定路由的路径属性
 Cisco(config)#route-map rm2 permit 10
 Cisco(config-route-map)#set c ommunity 100:1
 Cisco(config)#router bgp 100
 Cisco(config-router)#aggregate-address 172.16.0.0 255.255.0.0 summary-only as-set attribute-map rm2 //在BGP路由汇总时直接设置路径属性
 Cisco(config)#ip as-path access-list 1 permit _100$ //配置as-path访问控制列表，匹配起源于as 100的路由条目
 Cisco(config-router)#neighbor 12.1.1.2 filter-list 1 in //关联as-path访问控制列表到filter-list进行路由过滤
 Cisco#show ip bgp regexp xx //查看BGP表中被正则表达式匹配上的路由
 Cisco#show ip as-path-access-list //查看as-path访问控制列表的配置
 Cisco#show ip bgp filter-list 1 //查看BGP中被该filter-list匹配的路由
 Cisco(config-router)#neighbor 12.1.1.2 route-reflector-client //配置路由反射器的客户端
 Cisco(config-router)#bgp cluster-id 1.1.1.1 //修改放射器的簇ID
 Cisco(config-router)#redistribute ospf 1 match internal external //将OSPF的内部和外出路由都重发布到BGP
 Cisco(config-router)#distribute-list prefix 1 out connected //将直连路由重分布到BGP时在出方向过滤
 Cisco(config)#ip prefix-list 11 permit 11.11.11.0/24
 Cisco(config)#route-map rm1 permit 10
 Cisco(config-route-map)#set community 100:11
 Cisco(config)#router bgp 100
 Cisco(config-router)#network 11.11.11.0 mask 255.255.255.0 route-map rm1 //给所有邻居在network时关联执行路由策略
 Cisco(config-router)#neighbor 12.1.1.2 route-map rm1 out //给特定邻居执行路由策略
 Cisco(config-router)#$ redistribute ospf 110 route-map rm1 match external internal //将OSPF的内部和外出路由重发布到BGP时关联路由策略
 Cisco(config-router)#bgp confederation identifier 123 //标识BGP联邦号
 Cisco(config-router)#bgp confederation peers 234 //配联邦EBGP号
 Cisco(config-router)#neighbor 12.1.1.2 weight 1 //修改从特定邻居学到的所有路由的weight值
 Cisco(config-router)#bgp default local-preference 100 //修改local-preference值，默认为100
 Cisco(config-router)#maximum-paths 2 //修改等价负载均衡路由数量
 Cisco(config-router)#maximum-paths ibgp 2