If you upgraded or modified the software on a Cisco Catalyst 6500 series switch or more specifically a Sup1 or Sup2 supervisor engine, you need to modify the system boot variable.

The system boot variable determines where the supervisor engine should boot from. If you upgrade the software, your system boot variable is most likely still set to boot from the old software image. To change the boot system variable perform the following:

Issue the following command:

set boot sys flash bootflash:cat6000-supk8.7-6-14.bin prepend

You will want to replace "cat6000-supk8.7-6-14.bin" above with the actual file name that you loaded on the switch.

Now if you reset the switch it should boot from the bootflash:cat6000-supk8.7-6-14.bin image.