I am trying to connect an ethernet switch (D-Link Gigabit DGS-1005G) to one of the LAN ports of my ASUS RT N66R to extend wired access. When wired directly from the router to the PC, the internet connectivity works just fine. When I attempt to plug into the switch and connect to the PC through the switch, I get no internet connection. Do I need a crossover cable? Not sure why the router and switch are not talking.