一、实验拓扑：
二、实验要求：
1、R4、R1、R3、R2分别在BGP进程下部署邻居发送团体属性命令；
2、R4上部署ACL抓取4.4.4.4流量、route-map命名as、调用ACL、set community local-as；并在BGP进程中调用route-map as out；
3、验证：R1、R3有4.4.4.4，但是R2没有4.4.4.0的路由条目?
三、命令部署： R4(config)#route-map as permit 10 R4(config-route-map)#match ip address 10 R4(config-route-map)#set community local-as R4(config-route-map)##route-map as permit 1000
R4(config)#router bgp 4 R4(config-router)#neighbor 14.1.1.1 route-map as out
四、验证： R1#show ip bgp 4.4.4.4 BGP routing table entry for 4.4.4.0/24, version 4 Paths: (1 available, best #1, table Default-IP-Routing-Table, not advertised outside local AS) Flag: 0x8A0 Advertised to update-groups: 2 4 14.1.1.4 from 14.1.1.4 (4.4.4.4) Origin IGP, metric 0, localpref 100, valid, external, best Community: local-AS
R3#show ip bgp 4.4.4.4 BGP routing table entry for 4.4.4.0/24, version 4 Paths: (1 available, best #1, table Default-IP-Routing-Table, not advertised outside local AS) Flag: 0x8A0 Not advertised to any peer 4 1.1.1.1 (metric 156160) from 1.1.1.1 (1.1.1.1) Origin IGP, metric 0, localpref 100, valid, confed-internal, best Community: local-AS
R2#show ip bgp 4.4.4.4 % Network not in table
