Use this feature . the interface,which is connected to an end devices,such as a workstation,Never use the PortFast feature . switch ports that connect to other switches, hubs, or routers.

• 在连接到终端设备的端口上打开这个功能，比如说工作站，千万不要使用在连接到其他交换机、集线器或者路由器的端口上。