I'm using this router with an OC200 controller, and all of the firmware is up to date. I'm able to log in to the controller via the cloud using either the web interface or the Omada app (on Android).  I have my Spectrum Business cable modem connected to the the "WAN2" ethernet port.

I would like to add a T-Mobile 5G Gateway as a second internet connection and have the ER7206 load balance and fall over between the two connections. 

My question is: I can't see how to do this using the cloud interface. How do I turn, for example, the "WAN/LAN3" port into a dedicated WAN port? 

Will the options for load balance, etc., appear once I have added in a second internet connection?

Or is there something I'm missing?

Thanks very much for your help.

Best,

Subba