Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Router boots continuously (boot loop)

Core Issue

Boot loops are usually caused by insufficient memory in the router for the Cisco IOS  Software version.

This is a typical error message during the boot loop:

Unexpected exception, CPU signal 10, PC = 0x60364244

60364244 60362E40 6041AAFC 6041AB74 60419870 60419B80 604261F4 60425394 604261D8 60425394 6041CF0C

The router may get stuck in a continuous loop, which may be caused by a hardware issue. A continuous loop does not allow you to gain access to the router. The router continues to display error messages until it powers off.


To resolve this issue, use a Cisco IOS Software image that fits the platform memory, or upgrade the router memory to meet the Cisco IOS Software requirement. 

For more information, refer to the Continuous/Boot Loop section of Hardware Troubleshooting for the Cisco 3600 Series Router.

Version history
Revision #:
1 of 1
Last update:
‎06-22-2009 03:37 PM
Updated by: