While individual network requirements might vary, you should consider the following principles when planning your network topology:
- Regions - Depending on how your network is structured geographically, you might need multiple regions.
- Devices - Each FortiGate device should be added to its corresponding region. In addition, each FortiGate device must be able to connect to FortiManager.
- Hub and edges - You can identify one FortiGate device from each region to act as a primary hub and another to act as a secondary hub. Each region can have one primary hub device and one secondary hub device, but multiple edge devices are allowed in each region.
SD-WAN Orchestrator MEA automatically establishes overlay links between all hubs. Each hub also establishes tunnels to every edge device in the same region.
If you choose not to identify a hub device, SD-WAN Orchestrator MEA does not set up an overlay network for the region.