Would it be feasible to perform dual WAN using the wan port only, with both modems accessed via a switch,
and for example, Modem 1 on 192.168.0.1 and modem 2 on 192.168.0.2?, using static IP wan address in the asus router?
the dual wan function works because it looks at 2 separate connections those being ether from its wan port or its ewan port or its 3g/4g usb port , there is no way for the router to see two connections from its primary wan port
why you would have 2 modems connected to a switch in the first place would be my question