Which model? ROMMON command vary slightly from unit to unit.
Can you capture the error? Sounds like you either
- Loaded an image which is not compatible with your hardware
- Loaded an image which won't fit in RAM.
So
- What image name are you loading?
- What hardware is this?
- What is the exact error?
Usually, routers will store the configuration and software in different palces (flash: and nvram:) but there are minor variations by platforms (especially 800 series)
So... More details. The config file will not cause a crash unless there is a specific bug triggered by the config and that almost never ever happens.
If you suspect the config is a problem, you can set the unit to boot up and IGNORE the config file using the confreg command in ROMMON (tell it to ignire config file during the questions).
I suspect your real issue is an incompatible system image loaded into the unit. ROMMON doesn't check compatability.
Also, I have seen some of the older platforms fail with a checksum error even if the image is good. This usually indicates a hardware failure of some fort, either with the flash itself or the flash controller. I saw a few 3800 series suffer this in their flash (slot0:)