Start from verifying the current version of ROMMON. It is done with the show module command, and is listed under “Fw Version”

- Download the desired ROMMON image from official Cisco website and put it on a device which will act as a server for the FTP transfer.
- Upload the ROMMON image to the ASA flash memory with the following command:
copy ftp://[ip address of the server]/asa5508-firmware-xxxx.SPA flash0:asa5508-firmware-xxxx.SPA
- Upgrade the ROMMON image using the command below:
upgrade rommon flash0:asa5508-firmware-xxxx.SPA
- During the process of the ROMMON upgrade ASA will have to be restarted. When the question about the restart will be asked – confirm the restart.
- Verify that the ROMMON is successfully upgraded by issuing the command used at the beginning:
show module
Author: Jaroslaw Banakh