I have a cisco 1700 that I had setup with my previous cable modem and worked great. Got a new modem when the old one crapped out. New modem is U10C019 ( and I am not sure how to set this up. The only thing that looks like it might be used to set this up is the pass through settings. On this page is the option to add mac address. Tried adding the mac address of the cisco port that is connected to the modem, but no luck. Can someone help me out?