Forum discussion tagged with sb6121.
  1. Dan Silviu

    Motorola cable modem SB6121 keeps dropping off

    Hey guys, I've been having a bit of a problem with my internet from Xfinity. My modem needs to be restarted every other day to resume internet at a shitty speed. (20mbps in a 100mbps plan) I've had the modem since 2014 and it ran like a champ since recently. If anyone can recognize a specific...