I don't know what is up with this, but I just got a new Motorola Surboard 5120. When I plug the ethernet connection into my computer it seems to be working ok (though I've been dropped a few times, comcast says it is due to an outage in my area.) But when I plug the ethernet into the wan port on my router, all of the activity lights on both my router and switch start flashing constantly. All the connections break down until I pull the modem out. Then everything returns to normal. What could possibly caust this?
