int f0/0 ip rip authencaiton mode md5 ip rip authencation key-chain rip router rip ver 2 no auto network 192.168.1.0 network 2.2.2.0 network 3.3.3.0 passive-interface default 置 为被动接口,只收不发 neighbor 192.168.1.1 指定邻居,向他发单播