A. You can check the memory usage of the device by executing the display memory-usage command. If "Memory Using Percentage Is" exceeds 80%, you need to pay special attention currently.
B. You can check the running status of the board by executing the display device command, the “Online” of the board should be “Present”
C. You can view the fan status by executing the display fan command. When the Present item is NO, it means normal
D. You can view the FTP network service port by executing the display ftp-server command, and the unused FTP network service port needs to be recorded