To prevent a transfer of control from one system to the other while a firmware update is in progress, you must disable automatic failback on the High Availability page before attempting to update the firmware on either system.
Update the Firmware
On each system (passive then active), perform the following steps:
- Go to the ADVANCED > High Availability page.
- In the Cluster Settings section, set the Failback Mode to Manual.
- Click Save Changes.
- Go to the ADVANCED > Firmware Update page. If a more recent firmware version is available, the Download Now button will be enabled.
- Click Download Now. Click Refresh to update the download progress display at any time.
- To update the firmware, click Apply Now.
Enable automatic failback, if desired, after both systems have been updated and are back online.
- Go to the ADVANCED > High Availability page.
- In the Cluster Settings section, set the Failback Mode back to Automatic.
- Click Save Changes.
Revert the Firmware
The Firmware Update page allows you also to revert to a previous firmware version. You should only revert to an old firmware version if your recently downloaded version causes unexpected problems. Always contact Barracuda Networks Technical Support before reverting to a previous firmware version.