I bought a new modem and I'm having trouble getting it to connect to my existing router. Everything was fine before I installed the new modem. Router isn't even detecting the internet connection from the modem. I know that the modem isn't the problem because I don't ahve an issue running an ethernet cable from the modem to my computer. It just doesn't work from the modem to the router. Is there something wrong with my router/network? Do I need to get a new router? As far as I can tell, there's no such thing as a compatibility issue between a modem and a router. The modem is a Motorola MB7220 and the router is a netgear WNDR4300v3. Physically, everything is connected correctly. There's a coax cable from the wall to the modem and an ethernet cable from the modem to the router. The WiFi network is there, but I haven't been able to configure the router. Netgear's network genie doesn't detect the connection. I should also note that the issue HAS to be the router because I can get a connection on my laptop with an ethernet cable directly from the modem. I cannot get a connection with an ethernet running from the modem to the router and an extra cable from the router to my computer.