When this issue occurs, the Cisco IOS image could be corrupt or the Supervisor Engine crash could be due to Cisco bug ID CSCee63221.
Another reason can be due to the incorrect config-register setting on both the Route Processor (RP) and the Switch Processor (SP). The configuration register boot field determines whether or not the switch loads an operating system image, and if so, where it obtains this system image. The config-register can get out of sync for a variety of reasons, for example, changes in ROMMON, a CatOS to Cisco IOS upgrade, and so forth.
If any one of the two (RP or SP) is set wrong, it causes communication failure between the RP and SP hence device crashes. Once you set the config-register to the proper setting, the RP and SP synchronize, which allows the device to boot properly.
If the Cisco IOS image is corrupt, complete these steps:
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