Adding FortiGate branch devices to device groups
Branch FortiGates are meant to be in the same region. It is recommended to create a device group in FortiManager for the branch devices before utilizing the SD-WAN Overlay template to configure SD-WAN. With device groups, you can add additional branch devices to the group, and the newly added devices will automatically inherit the configuration for SD-WAN.
Even if you have only one FortiGate as the branch device, add the device to a unique device group in FortiManager.
In Device Manager, use the Device Group menu in the banner to create a new device group.
In the following example, the device group named Branches contains two branch FortiGates: