HA graceful upgrade to FortiOS 6.0.16

Use the following steps to upgrade a FortiGate-6000 or 7000 HA cluster with uninterruptible-upgrade enabled from FortiOS 6.0.15 build 0405 to FortiOS 6.0.16 Build 0416.

Enabling uninterruptible-upgrade allows you to upgrade the firmware of an operating FortiGate-6000 or 7000 HA cluster 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 6.0.15 build 0405 to FortiOS 6.0.16 Build 0416:

1. Use the following commands to enable uninterruptible-upgrade to support HA graceful upgrade:

   config system ha

   set session-pickup enable

   set uninterruptible-upgrade enable

   end

2. Download the FortiGate-6000 or 7000 FortiOS 6.0.16 Build 0416 image file from the https://support.fortinet.com FortiGate-6K7K 6.0.16 firmware image folder.

3. Perform a normal upgrade of your HA cluster.

4. Wait a few minutes, and when the upgrade is complete, verify that you have installed the correct firmware version. For example, for the FortiGate-6301F:

   get system status
   Version: FortiGate-6301F v6.0.16,build0416,221219 (GA)
   ...