ASA 5525: where is boot system disk0:\ ???

[briansciarra]

Hey,  I have an ASA 5525, I have to asa image files loaded in flash

when I do a 'sho run' I do not see

boot system disk0:/asa825-k8.bin

but I know it's using this image because when I do 'sho bootvar' I see

BOOT variable = disk0:/asa825-k8.bin

When I attempt to change the image it's using I do:

no boot system disk0:/asa825-k8.bin

boot system disk0:/asa825-26-k8.bin

wr mem

reload

When it reloads it's still using asa825-k8.bin

When I do a 'sho bootvar' it shows

boot system disk0:/asa825-k8.bin;disk0:/asa825.26-k8.bin

So it took what I added but didn't remove what I deleted

I also tried 'clear configure boot' to clear the boot entries but that didn't work either

Any idea what I have to do???   It seems like it accepts my commands to clear the boot variable but doesn't actually do it

[Marvin Rhoads · Accepted solution]

In addition to the boot variable commands, there is also the config-register value. the options for that are explained here: link.

On most Cisco devices (ASA included) the config-register value instructs the device whether to use a value configured in the startup-config as the system boot file or other options - such as first file on disk etc.

You can confirm your value with "show ver | i register".

[briansciarra]

You know what man, I rebooted my ASA and then suddenly all those boot system commands started to work.  Weird...