BGP 安全问题：伪AS号连接隐藏真实AS

均其他常规配置,AS2隐藏变为65000

R1# E1/0  AS2  -------  AS3 e1/2 R2 e1/7--------R3e1/7 

R1
router bgp 2
 bgp router-id 1.1.1.1
 bgp log-neighbor-changes
 neighbor 2.2.2.2 remote-as 3
 neighbor 2.2.2.2 local-as 65000 no-prepend replace-as ---路由器R1 邻居加该命令是，用AS 65000替换本地AS 2 
 neighbor 2.2.2.2 ebgp-multihop 2
 neighbor 2.2.2.2 update-source Loopback0
R2
router bgp 3
 bgp router-id 2.2.2.2
 bgp log-neighbor-changes
 neighbor 1.1.1.1 remote-as 65000
 neighbor 1.1.1.1 ebgp-multihop 2
 neighbor 1.1.1.1 update-source Loopback0