A WLAN device restarts unexpectedly

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The possible causes of an unexpected restart or repeated restarts of a WLAN device are as follows:
- The WLAN device has a hardware failure or system software bug.
- Other exceptions occur on the WLAN device.
You can rectify the faults by following these procedures:
1. Check the cause of restart.
Run the display reset-reason command to check the causes of a device restart.
- If "Reset for power off" is displayed, the device restarts due to a power-off.
- If "Reset for unknown reason" is displayed, the device restarts due to an unknown error.
- If "Reset for update version success" is displayed, the device restarts due to a successful upgrade.
- If "Reset for update version failed" is displayed, the device restarts due to an upgrade failure.
- If "Reset for kernel panic" is displayed, the device restarts due to a kernel error.
- If "Reset for mfpi detect fwd abnormal" is displayed, the device restarts due to a forwarding kernel error.
- If "Reset for memory use out" is displayed, the device restarts due to insufficient memory.
- If "Reset for exception" is displayed, the device restarts due to a VOS error.
2. Handle the fault according to the causes displayed in step 1. If the restart is caused by a hardware failure or system software bug, contact Huawei technical support.
Perform the following operations to collect information, and provide the information to help Huawei engineers locate the faults:
Note: Do not power off the WLAN device before information collection.
a. Run the display diagnostic-information command in any view to obtain the diagnostic information of the WLAN device.
The display diagnostic-information command displays outputs of multiple display commands. You can use this command to collect device diagnostic information.
b. Collect user logs and diagnostic logs.
The command used on the AC and Fat AP are the same. The following takes the configuration on the AC as an example:
save logfile
system-view
[AC6605] diagnose
[AC6605-diagnose] save diag-logfile
Save diagnostic log file successfully.
[AC6605-diagnose] info-center create logbook flash:/logfile/logbook.xml
c. Run the following command to collect information (V200R003 or later).
The command used on the AC and Fat AP are the same. The following takes the configuration on the AC as an example:
display reset-reason
system-view
[AC6605] diagnose
[AC6605-diagnose] display inspect black-box record 8 0 0 0
[AC6605-diagnose] display inspect black-box record 10 0 0 0
[AC6605-diagnose] display inspect black-box record 12 0 0 0
[AC6605-diagnose] display inspect black-box record 13 0 0 0
[AC6605-diagnose] set kernel-monitor irq
[AC6605-diagnose] display kernel-monitor irq level 1
[AC6605-diagnose] display kernel-monitor irq level 2
[AC6605-diagnose] display kernel-monitor irq level 3
[AC6605-diagnose] display lastwords all

Other related questions:
Scheduled restart of a WLAN device
WLAN devices support scheduled restart since V200R002. Run the schedule reboot { at < time > | delay < interval > } command in the user view to enable the scheduled restart function. - at < time >: specifies the specific scheduled restart time. - delay < interval >: specifies the waiting time before the scheduled restart.

What should I do if the configuration is lost after a WLAN device is restarted
The loss of configuration after AC restart is generally caused by either of the following: the configuration file is not saved successfully, or the specified startup file is incorrect. Perform the following operations for different problems: Scenario 1: The configuration is not saved or fails to be saved. save The current configuration will be written to the device. Are you sure to continue?[Y/N]Y Info: Please input the file name(*.cfg,*.zip)[vrpcfg.zip]:Y If it is a new AC, the system will ask you to enter the file name (vrpcfg.zip by default, which can also be created with the file name extension .zip or .cfg) when you save the configuration for the first time. If you do not need to save the configuration to another file, press Enter directly. (You must press Enter or enter a new configuration file name. Otherwise, the configuration cannot be saved and the AC is unconfigured after restart.) If the system shows "Info: Save the configuration successfully.", the configuration file is successfully saved. You are advised to run the display saved-configuration command to verify that the configuration is properly saved. Scenario 2: The configuration file is not specified, or the configuration file specified for the next startup is different from the saved configuration file. a. Check the configuration file. dir /all b. Check the startup file. Check whether the name of the next startup saved-configuration file is the same as that of the saved configuration file. If the file name is null or is different from that of the saved configuration file, specify the configuration file for next startup again. display startup c. Specify the configuration file for the next startup startup saved-configuration vrpcfg.zip Scenario 3: WLAN service configurations on the AC are not delivered to Fit APs and therefore do not take effect. After WLAN services are configured on the AC, run the commit { all | ap ap-id } command in the WLAN view to deliver the configuration.

Change the SSID on WLAN devices
Change the SSID on WLAN devices. Command output on the CLI: [HUAWEI]wlan [HUAWEI-wlan-view]service-set name test [HUAWEI-wlan-service-set-test]ssid huawei If the SSID is in use and cannot be modified, unbind SSID invocation and change the SSID again.

What is a patch of a WLAN device
A patch is a kind of software compatible with the system software. It is used to remove some critical bugs from system software. Patch classification: - Hot patch Hot patches do not interrupt running services of a WLAN device and can repair software defects of the current system without restarting the device. - Cold patch Cold patches repair software defects of the current system only after a device restart. SPH indicates a hot patch, while SPC indicates a cold patch. The patch file uses .pat as the file name extension.

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