Core issue
The switch boot goes into ROMmon mode and sometimes can go into a continuous boot loop with this error message:
Self decompressing the image : #################################################
#################################################
##########################
################################### [OK]
%SYSTEM-1-INITFAIL: Network boot is not supported.
This can be caused due to this reason:
The boot variables are not set correctly to boot the switch from a valid software image.
The software image in the Flash memory is missing or corrupted, or there is a software upgrade failure.
Resolution
Complete these steps in order to resolve this issue:
Check the boot variable that points to the valid software image.
If the boot variable is correct and the manual boot fails again, then perform a software recovery procedure.
Refer to Supervisor Engine module does not come online due to continuous booting loop, invalid boot variable, incorrect configuration register setting or corrupt image for more information.