I too have the SMCD3GNV router from Comcast and I just threw in the towel after trying to get the Chromecast I bought tonight to work after three hours. I rebooted and reset, enabled unpn, and every other suggestion I could find online and still nothing-it can't connect to my wireless network. It keeps telling me to check network settings and try again. I'll call comcast tomorrow but I'm not expecting much help.
... View more