FortiGate-FortiExtender zero-touch provisioning (ZTP)

FortiExtender supports FortiGate-FortiExtender zero-touch provision (ZTP). FortiExtender default discovery mode is set to auto with DHCP server enabled over the LAN interface. The process is outlined stepwise as follows:

1. A SIM card without a PIN code is expected to be used for ZTP, and the default APN should be retrieved automatically at first connection.
2. Acting as a DHCP client, FortiGate connects to a FortiExtender LAN port (1, 2, or 3) interface to obtain a private IP to reach FortiManager.
3. FortiGate reports the discovered FortiExtender to FortiManager to authorize it (FortiExtender).
4. Once authorized, FortiExtender switches to IP-passthrough mode and then reboots itself.
5. Upon booting up in IP-passthrough mode, FortiExtender serves as the FortiExtender WAN interface of FortiGate.