said by andyross:There was another thread where a bunch of people ran into the same issue. Usually, a reboot fixes it. For some, it happened 2 or 3 days in a row, then was fine.
Well also if all lights on the modem are solid(even the activity light), and your using a router. There could be a problem between modem and router. So checking your ethernet cable between the modem and router, and the router. If your direct connected to the modem check ethernet cable between the two and possible your NIC. I would first reset the modem, and see if anything was logged besides you rebooting the modem. If nothing in there keep a eye out on what I posted above.