Upstream FortiManager provides delta only updates to downstream FortiManagers in cascade mode 7.4.2

This information is also available in the FortiManager 7.4 Administration Guide: Providing delta updates to downstream FortiManagers in cascade mode

Upstream FortiManager provides delta only updates to downstream FortiManagers in cascade mode - air gapped environments, to save the WAN bandwidth and reduce update time.

To provide delta updates to downstream FortiManager:

1. On the online FortiManager, go to FortiGuard > Query Services > Receive Status, and Export the FortiGuard package.
   A dialog appears with the option to enable or disable delta package downloads.

2. Enable the Download Delta Data toggle. When enabled, the merged FortiGuard package will be downloaded with delta packages.
   
   

3. On the upstream FortiManager, go to FortiGuard > Query Services > Receive Status and Import the package with the delta packages. The download history shows the imported delta packages.
   

4. The downstream FortiManager can pull delta packages from the upstream FortiManager instead of getting the entire merged package, saving bandwidth.