There are some misleading assumptions here, so I'm going to clarify for future Googlers. This is an old post, but it came up in the first page of search results while looking up the ASA confreg bitmap.
Thanks for those who are willing to take the time to assist. So I just want to make sure my device is booting the right way and I guess not understanding how these feature works is really bothering me. I then did a factory-default just to load something simple to NVRAM, saved it and did a reload and the configurations where still there. I then did the "boot system flash:asamodel.bin" then changed the config-register to 0x1 as it was set to a 0x20xx, I don't remember what it was set to exactly but then I saved it, did a reload and it booted with the IOS image. So to get to where I am now, I copied the IOS to flash thru a TFTP server on my laptop and saved it to NVRAM "wr mem". Am I not understanding it right or do these codes apply differently with other models? If I set it to 0x1 it loads like normal, or at least to the factory default that I created and is currently in flash.
I've read that 0x2102 is default and is what it should be set at but when I set it to this and do a reload it takes me back into rommon mode again.
Cisco asa 5505 setup code#
So I had an employee accidently erase flash on a Cisco ASA 5505 and it kept booting to rommon mode because it lost the IOS and had a question regarding the config-register code after re-loading the IOS thru TFTP and saving it to flash.
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