@Liverpool20 Thanks for the advice. Yes, the WAN IP address on the AX11000 was the same as the AT&T "fiber gateway" device. I tried everything I could think of and worked with an AT&T specialist for...

I have a TP-Link Archer AX11000 802.11ax Tri-band gaming router that is connected to over 30 devices in our house. I recently replaced our COX cable modem that had 1 Gbps internet with an AT&T...