I have the AR300M and two WAN connections, tethering from iPad and Wifi repeater from a MiFi hotspot. I have installed a the MWAN3 load balancing plug in and set the metrics and weight of both connections all to 2. Hopefully, they are load balancing properly. I don’t have a ethernet WAN or 3G/4G WAN.
What I want to see is how much bandwidth is being used for each WAN interface since each connection has limited data.