Upgrading the ROMMON Version on a Cisco ASA

If you need to upgrade the ROMMON version on your ASA, here is a quick guide. Note that you cannot downgrade ROMMON versions, only upgrade.

Here are the steps to Upgrade the ROMMON version:

Before you begin: Verify your current version of ROMMON. The current version is listed under ‘Fw Version’

Step 1: Obtain the new ROMMON image from Cisco and put it on a server to copy. This example will be for TFTP.

Step 2: Copy the ROMMON image to the ASA flash memory:

copy tftp://server-ip/asa5500-firmware-xxxx.SPA disk0:asa5510-firmware-xxxx.SPA

Step 3: Upgrade the ROMMON image:

upgrade rommon disk0:asa5500-firmware-xxxx.SPA

Step 4: Confirm the reload when prompted on the ASA. The ASA will upgrade the ROMMON version and then perform a reload to complete the process.

Step 5: Verify the correct version of ROMMON is loaded after the upgrade.

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Alison Wallick. Network Support Engineer

Other Networking Basics:

Taking and Restoring ASDM Backups

Setting up SSH and Local Authentication 

Upgrading ASA and ASDM Images on New ASAs

Setting Up New Meraki Access Points

Adding and Removing Devices from the Meraki Dashboard

Site-to-Site VPN between Meraki and ASA