Where do you do bug reporting for this device?
The Optional WAN port will function even if nothing is plugged into it, so long as the device that serves your addresses, IE a cable modem, is plugged into the Dedicated WAN port.
had two static ip addresses. one assigned to dedicated, one assigned to optional. nothing plugged into optional. could access both address from the outside and if i disabled the dedicated, www.whatismyip.com from the inside would show the ip address of the optional, even though nothing was plugged into it.