How to Update Mellanox CX455A Firmware on ESXi?

Updating the firmware of Mellanox CX455A network interface cards (NICs) on an ESXi server is crucial for maintaining optimal performance and security. This guide will walk you through the process, ensuring you have the latest firmware for your Mellanox CX455A NICs.

Preparation for Mellanox CX455A Firmware Update

Before initiating the firmware update, ensure you have the following:

• Latest Firmware and Tools: Download the latest firmware for Mellanox CX455A from the Mellanox official support site. Additionally, obtain the Mellanox Firmware Utility (mlxup or MFT) which is essential for the update process.
• Access to ESXi Server: Make sure you have administrative access to your ESXi server via SSH or the ESXi Shell.
• Backup: Always create a backup of your current configuration and data before performing any firmware updates.

Steps to Update Mellanox CX455A Firmware

1. Download and Install Mellanox Firmware Tools

Navigate to the Mellanox support page and download the appropriate firmware package and the Mellanox Firmware Utility (either mlxup or MFT). Transfer these files to your ESXi server. Follow the installation instructions provided by Mellanox, typically involving unpacking the tarball and running an installation script.

2. Verify Current Firmware Version

Using the Mellanox Firmware Utility, check the current firmware version of your CX455A NICs. This step is crucial to confirm the necessity of the update and to have a reference point in case a rollback is needed. Execute a command similar to:

bash mlnx-fw-util --check

or for MFT:

bash mst status

3. Perform the Firmware Update

With the Mellanox Firmware Utility, initiate the firmware update process by specifying the path to the downloaded firmware file. Ensure the server is in a maintenance window to avoid service disruptions. The update command might look like:

bash mlnx-fw-util --update -f

For MFT, use the flint command after ensuring the firmware file is accessible and has the correct permissions:

bash flint -d /dev/mst/ -i burn

Monitor the update process closely and verify the success of the operation once completed.

Post-Update Verification and Best Practices

After successfully updating the firmware of your Mellanox CX455A NICs, reboot the ESXi server (if required by the update process) and verify the new firmware version using the same utility commands. Additionally:

• Test Network Connectivity: Ensure all network connections are functioning correctly post-update.
• Document Changes: Keep a record of the firmware versions and update dates for future reference.
• Regular Updates: Schedule regular firmware checks and updates to benefit from the latest features and security patches.

Updating the firmware of Mellanox CX455A NICs on an ESXi server is a straightforward process when done with the right tools and preparation. By following these steps, you ensure the continued optimal performance and reliability of your network infrastructure.