CCIE复习指导：配置BGP案例八

会计考友

Case 8
9 a9 o! E/ z( J+ ]9 q( ^只允许路由器C把超网160.10.0.0/8发送给路由器A,而过滤掉网络160.10.0.0/16:
路由器C配置如下:
!
router bgp 300
network 170.10.0.0
neighbor 3.3.3.3 remote-as 200
neighbor 2.2.2.2 remote-as 100
neighbor 2.2.2.2 distribute-list 1 out
& Z7 \+ N8 D; m7 \/ \, J!
access-list 101 permit ip 160.0.0.0 0.255.255.255 255.0.0.0 0.255.255.255
!
5 d) C' t) l2 P/ fAS_PATH Filtering
使用AS_PATH属性过滤BGP路由的步骤如下:
1.定义AS_PATH ACL:
Aiko(config)#ip as-path access-list {number} {permit|deny} {regex}
2.调用AS_PATH ACL过滤BGP路由:
' T) V  \% p5 WAiko(config-router)#neighbor {ip-address} filter-list {AS_PATH ACL} {in|out}