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[WLC/WLA] Troubleshooting Access Point (AP) reboots

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Article ID: KB29236 KB Last Updated: 19 Jun 2014Version: 1.0
Summary:

This article provides information on what data to gather when troubleshooting AP reboots.

Symptoms:

Cause:

Solution:

If you are experiencing AP reboots and are able to rule out any network issues as the cause:

  1. Collect the data below.
  2. Analyze the data yourself to determine the cause of the fault, or provide it to JTAC.


CONTROLLER TRACES:

# set log trace enable severity debug
# set trace tapa level 10
# set trace apm_fmx level 10
# set trace apm_mgr level 10

As the traces are verbose, a syslog server is highly recommended:

# set log server a.b.c.d severity debug 


PACKET CAPTURES:

Configure a packet capture at the controller's uplink.


NOTES:

  • Both the traces and packet captures should capture the same time interval, relative to the same reference watch. For example, if the traces are running between 00:00 and 00:02, the packet capture should be collected during the same time interval.

  • The management traffic between the WLAs and WLCs is usually encrypted. The management traffic must be analyzed. Disable this feature while the troubleshooting efforts are running:

# set ap security none

Manually reboot the monitored APs. Manual and voluntary reboot completely turns off the encryption feature.


OTHER OUTPUTS

#show tech-support file <filename>
#show log buffer -20000
#show log trace
(or the syslog output)

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