Failing to set up IP Passthrough between BGW320-500 and TP-Link mesh
I am trying to set the modem/router provided by AT&T to IP passthrough so that my mesh system can forward ports (see image below). I have also turned off the WiFi network created by the BGW320-500 router. However, when I access TP-Link's configuration page, I still see an internet IP Address where the public address should be. In addition, I can't seem to forward the ports that I want to forward (I checked using an online tool). Are there any other steps I'm missing? I tried turning the DHCP Server off, but that then disconnects the mesh router from the internet. I'm also curious if I need to set up Cascaded Router (I couldn't figure out what Network Address to use). Any help would be greatly appreciated. Thanks.
Some further info: I have a mac mini connected to another LAN port on the BGW320-500, would that cause an issue? The mesh router is connected using the 5Gbps ethernet port, and I allocated a static IP address to it.