HA graceful upgrade to FortiOS 7.0.15

Use the following steps to upgrade a FortiGate 6000 or 7000 HA cluster with uninterruptible-upgrade enabled from FortiOS 6.4.15 build 1940 or FortiOS 7.0.13 build 0206 to FortiOS 7.0.15 Build 0249.

Enabling 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 6.4.15 or 7.0.13 to FortiOS 7.0.15:

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

   config system ha

   set uninterruptible-upgrade enable

   end

2. Download FortiOS 7.0.15 firmware for FortiGate-6000 or 7000 from the https://support.fortinet.com FortiGate-6K7K 7.0.15 firmware image folder.

3. Perform a normal upgrade of your HA cluster using the downloaded firmware image file.

4. Verify that you have installed the correct firmware version. For example, for a FortiGate-6301F:

   get system status
   Version: FortiGate-6301F v7.0.15,build0249,240404 (GA.M)
   ...