Multiple IOS mages in BOOTVAR string ASA 5500 series

[goodwinag]

Hello,

We have an ASA that is our main firewall, when typing the show bootvar command, the following output appears:

BOOT variable = disk0:/asa961-smp-k8.bin;disk0:/asa931-1-smp-k8.bin;disk0:/asa931-1-smp-k8.bin;disk0:/asa921-smp-k8.bin
Current BOOT variable = disk0:/asa961-smp-k8.bin;disk0:/asa931-1-smp-k8.bin;disk0:/asa922-4-smp-k8.bin;disk0:/asa921-smp-k8.bin

We would like to have the first one in the string as the boot image, would removing the remaining images be as simple as follows?

no boot disk0:/asa931-1-smp-k8.bin

no boot disk0:/asa931-1-smp-k8.bin (duplicate)

no boot disk0:/asa921-smp-k8.bin

After doing so, would the above mentioned images be removed from the bootvar?

Thanks In Advance,

Tony

[Anton Abik · Accepted solution]

Hi,

1. just execute show run boot
2. copy the output of this command. You will see something like this "boot system disk0:/asaXXX-smp-k8.bin" multiple times for every image
3. put down "NO" before every image you dont want, like this "no boot system disk0:/asaXXX-smp-k8.bin"
4. Leave just the one you want
5. copy run start

Hope it helps