I have an old 4000 router that I use in my test environment.
It now won't boot. I can see the image in dir flash:, but when I command boot flash:filename.bin, I get an error saying that the image is not valid.
Although I did not get a cookie error, the cookie command in rommon returns all zeros.
Before chucking this thing, I'd like to try to recreate the cookie info just to see what happens.
If anyone has an old 4000/4500 laying around and can provide a sample cookie, it would be appreciated.