1、例如：
arp -s 157.55.85.212 00-aa-00-62-c6-09
2、不过这句话在Windows7显得这么无助，会提示：ARP 项添加失败: 请求的操作需要提升。
（英文版提示：The ARP entry addition failed: Access is denied. ）
3、询问了下Windows Client TechCenter，其中一个Moderator回答了我：
"Maybe you were trying to add a new IP-to-MAC record for an existed IP address or MAC address. We are not able to realize it with arp commands in Windows 7. "
4、原来windows7不支持用arp添加已经绑定了的地址，看来arp不行，只能拿起“万能而且万恶”的netsh了,
netsh interface ipv4 set neighbors 12 "57.55.85.212" "00-aa-00-62-c6-09" store=active
5、注意：12是网卡序号，需要运行前先查下。