What must be true for FortiGate to add a static route to the routing table?

For FortiGate to successfully add a static route to the routing table, it is essential that the outgoing interface is up. This means that the interface designated for forwarding traffic must be operational and able to send and receive packets. If the outgoing interface is down, the device cannot use this route for traffic, making it impossible to add to the routing table since it would be ineffective for network communication.

This requirement highlights the importance of interface status in routing decisions. A static route without an active outgoing interface cannot function properly, as there will be no path for the traffic to travel through. Thus, having the outgoing interface up ensures that the routing entry is valid and can be utilized for directing packets to the respective destination.