[Knowledge sharing] Common display commands for WLAN

Hello everyone,

In this post I would like to show you some useful commands that can be useful sometimes.
Huawei devices provides various display commands to display hardware, interface, and software information. The information helps you locate various faults.

The following table lists the commands used to collect fault information.

Basic information	display diagnostic-information	This command collects basic system information. It displays outputs of multiple display commands, including display version and display current-configuration. This command is necessary for any network problems. Executing this command takes a long time. You can press Ctrl+C to pause diagnosis information display on screen.
Device information	display device	This command displays card status. If the status of a card is displayed as Abnormal, the card is faulty.
Interface information	display interface	This command displays interface information to help you analyze cause of interface interconnection failures and check statistics on lost packets.
Versions	display version	Version information is important for device fault location. This command displays versions of the system software, BootROM, MPU, fan modules, as well as sizes of storage devices. NOTE: ACU2 has no fan.
Patch information	display patch-information	This command displays current patch information, including the patch package version and patch package name.
Electronic label information	display elabel	Electronic labels identify information about hardware components of a device. This command displays electronic labels of cards on a device.
Device status	display health	This command displays the temperature, power supply information, fan information, power, CPU usage, memory usage, and storage medium usage of a device. NOTE: ACU2 has no fan.
Current configurations	display current-configuration	This command displays all configuration information on a device. You can specify a regular expression to obtain the required configuration information.
Saved configurations	display saved-configuration	If a device has started but is not working properly, run the display saved-configuration command to check the startup files specified by the startup saved-configuration command. Run the display saved-configuration last command to check the configuration saved last time. Run the display saved-configuration time command to check the last time when the configuration is saved.
Time	display clock	This command displays the current system date and time.
User logs	display logfile buffer	Executing this command in the diagnostic view can display user logs in the log buffer.
Diagnostic log	display diag-logfile buffer	Executing this command in the diagnostic view can display user logs in the log buffer.
Alarms	display trapbuffer	This command displays information recorded in the trap buffer.
Memory usage	display memory-usage	This command displays memory usage of the device.
CPU usage	display cpu-usage	This command displays CPU usage of the device.
AP's running information	V200R005 or earlier: display ap-run-info V200R006 or later: display ap run-info	This command displays the AP's running information. NOTE: The prerequisite is that the AP is in normal state.
AP status	display ap all	This command displays the AP status.
Access user information	display access-user display station	This command displays information about an access user.
Full-process service diagnosis information about an AP or STA	display trace information	Before running this command, run the following commands to enable service diagnosis and configure the diagnosis object: [AC6605] trace enable [AC6605] trace object mac-address e468-a352-1160 //e468-a352-1160 is the MAC address of an AP or STA.