Core Issue
Causes for the error message include bootup processes, Online Insertion and Removal (OIR) events, attempting to access a bad or missing Flash device, or a Cisco IOS Software bug.
Resolution
The severity of the error depends on the cause. In some cases, no action is required. In other cases, a configuration change or an upgrade may be necessary. For more information on the %SYS-3-CPUHOG error message as well as troubleshooting steps, refer to What Causes %SYS-3-CPUHOG Messages?.
