Zero Configuration - Fortinet FortiAP U421EV Quick Start Manual

Zero
Configuration
The FortiAP unit is designed to require no configuration in most
networks. Zero configuration mode works if the unit is directly
connected to a Wireless LAN Controller (WLC) or is on the same
layer-2 network and subnet as the FortiWLC, or if the unit is directly
connected to the FortiGate LAN Controller or is on the same layer-3
network and subnet as the FortiGate or FortiCloud controller.
If the FortiAP wireless controller's IP address cannot be determined
using Zero Configuration mode, or if the network uses static IP
addresses, it can be configured to use a static IP address.
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