三、命令部署：
R1(config)#router bgp 1
R1(config-router)#neighbor 12.1.1.2 remote-as 234
四、验证：
1、查看R1正常状态下BGP状态：show ip bgp neighbor
R1#show ip bgp neighbor
BGP state = Established, up for 02:08:06
2、R1进程下将邻居修改为remote-as 234，再次查看BGP状态：
R1#show ip bgp neighbor
BGP state = Active
R1#show ip bgp summary
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
12.1.1.2 4 234 6 6 0 0 0 never Active
原文：http://blog.51cto.com/13856092/2137553