Use the following steps to upgrade a FortiGate-6000 or 7000 HA cluster with
uninterruptible-upgrade enabled from FortiOS 6.2.11 build 1223 or 6.4.8 build 1823 to FortiOS 6.4.10 Build 1875.
You cannot use the information in this section to upgrade a FortiGate-7121F from FortiOS 6.4.6 build 1783 to FortiOS 6.4.10 Build 1875. Instead, see the section, Upgrading a FortiGate-7121F from FortiOS 6.4.6 to 6.4.10.
uninterruptible-upgrade allows you to upgrade the firmware of an operating FortiGate-6000 or 7000 HA configuration with only minimal traffic interruption. During the upgrade, the secondary FortiGate upgrades first. Then a failover occurs and the newly upgraded FortiGate becomes the primary FortiGate and the firmware of the new secondary FortiGate upgrades.
To perform a graceful upgrade of your FortiGate-6000 or 7000 from FortiOS 6.2.11 or 6.4.8 to FortiOS 6.4.10:
Use the following command to enable uninterruptible-upgrade to support HA graceful upgrade:
config system ha
set uninterruptible-upgrade enable
Download FortiOS 6.4.10 firmware for FortiGate-6000 or 7000 from the https://support.fortinet.com FortiGate-6K7K 6.4.10 firmware image folder.
Perform a normal upgrade of your HA cluster using the downloaded firmware image file.
Verify that you have installed the correct firmware version. For example, for a FortiGate-6301F:
get system status Version: FortiGate-6301F v6.4.10,build1875,221122(GA) ...