Cisco 4400 Series User Manual

D-5
Cisco Wireless LAN Controller Configuration Guide
OL-17037-01
Appendix D Troubleshooting
Using the CLI to Troubleshoot Problems
Using the CLI to Troubleshoot Problems
If you experience any problems with your controller, you can use the commands in this section to gather
information and debug issues.
1. show process cpu—Shows how various tasks in the system are using the CPU at that instant in time.
This command is helpful in understanding if any single task is monopolizing the CPU and
preventing other tasks from being performed.
Information similar to the following appears:
Name Priority CPU Use Reaper
reaperWatcher ( 3/124) 0 % ( 0/ 0)% I
osapiReaper (10/121) 0 % ( 0/ 0)% I
TempStatus (255/ 1) 0 % ( 0/ 0)% I
emWeb (255/ 1) 0 % ( 0/ 0)% T 300
cliWebTask (255/ 1) 0 % ( 0/ 0)% I
UtilTask (255/ 1) 0 % ( 0/ 0)% T 300
In the example above, the following fields provide information:
• The Name field shows the tasks that the CPU is to perform.
• The Priority field shows two values: 1) the original priority of the task that was created by the
actual function call and 2) the priority of the task divided by a range of system priorities.
• The CPU Use field shows the CPU usage of a particular task.
• The Reaper field shows three values: 1) the amount of time for which the task is scheduled in
user mode operation, 2) the amount of time for which the task is scheduled in system mode
operation, and 3) whether the task is being watched by the reaper task monitor (indicated by a
“T”). If the task is being watched by the reaper task monitor, this field also shows the timeout
value (in seconds) before which the task needs to alert the task monitor.
Note If you want to see the total CPU usage as a percentage, enter the show cpu command.
RADIUS_SERVERS_FAILED Check network connectivity between RADIUS
and the controller.
CONFIG_SAVED Running configuration has been saved to flash -
will be active after reboot.
MULTIPLE_USERS Another user with the same username has logged
in.
FAN_FAILURE Monitor controller temperature to avoid
overheating.
POWER_SUPPLY_CHANGE Check for power-supply malfunction.
COLD_START The controller may have been rebooted.
WARM_START The controller may have been rebooted.
Table D-1 System Messages and Descriptions (continued)
Error Message Description

Cisco 4400 Series Specifications

General

Brand	Cisco
Model	4400 Series
Category	Controller
Language	English