Using 3rd Party Router with UVerse - DVR Connected via Ethernet
So I have been dissatisfied with AT&T's gateway as a router and purchased a Netgear R8000 Tri-Band Router. I am finding myself having issues getting things setup. Current Setup is as follows: Port 1 of Gateway to Ethernet Port of Netgear Router; Port 1 of Router to 16 Port Switch; 16 Port Switch to 8 Port Switch; Port 4 of Switch to DVR. (Note: 16 Port switch send signals to different rooms of the house, 8 Port switch sinds the signal of that room to various hardwired devices).
I keep getting "No Signal" from the DVR box. AT&T wants me to pay $50 for Elevated Support, when I know how to do this stuff. I just need to know what exact setting the DVR Box needs to communicate with the Gateway. Is it an MTU Size issue? Is it an IP address range setting? Any help would be appreciated.