Upgrading the FortiManager firmware for an operating cluster
You can upgrade the FortiManager firmware of an operating FortiManager cluster in the same was a upgrading the firmware of a standalone FortiManager unit. During the firmware upgrade procedure, you connect to the primary unit Web‑based Manager or CLI to upgrade the firmware. Then install the firmware on the slave units.
Similar to upgrading the firmware of a standalone FortiManager unit, normal FortiManager operations are temporarily interrupted while the cluster firmware upgrades. As a result of this interruption, you should upgrade the firmware during a quiet period.
To upgrade FortiManager HA cluster firmware:
1. Log into the primary unit Web‑based Manager.
2. Upgrade the primary unit firmware.
3. Log into the slave unit Web-based Manager.
4. Upgrade the slave unit firmware.
5. Do the same for all slave units.
Administrators may not be able to connect to the FortiManager Web‑based Manager until the upgrade synchronization process is complete. During the upgrade, using SSH or telnet to connect to the CLI may also be slow, however use the console to connect to the CLI.