physical port control 物理端口控制
Choosing A Physical Port 选择一个物理端口
Identify physical port roles 识别物理端口角色
Physical port and logical port 物理端口和逻辑端口
physical user port 物理用户端口
physical service port 物理业务端口
One "port Security" feature lets you force your switch to allow only one MAC address for each physical port on the switch.
有一个“端口安全”功能是允许你强制使你的交换机在每个端口只允许(IP地址对应的)一个MAC地址通过。
If it isn't, there may be a problem with the physical connection from the network adapter on your host to the gateway (for example, a faulty switch port, cable, network card).
如果无法到达这个网关，那么从您主机上的网络适配器到网关的物理连接可能有问题（例如交换机端口、线路和网卡有故障）。
Make sure to test both ways from each physical server, as switch ports can be mis-configured for inbound and outbound per port.
确保测试每个物理服务器的双向通信，因为交换机对每个端口的入站和出站通信可能配置有误。
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