ATT Fiber 1gbps speed halved when connecting through cascaded router
I have an ATT uverse modem/router (5268ac fxn). I have another router, a netgear ac1750 connected to the att router. I have a 1gbps internet connection. If I connect my computer to the netgear router through ethernet, I only get 500mbps, whereas if I connect to the att router I get the 1gbps on speedtest. What could be going on?