A WLAN device restarts unexpectedly

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
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