I hope someone can help me. I have an Arris SB8200 modem with 2 ethernet ports. I have been working from home for about 2 years now and I have never had an issue with plugging my home ethernet cord and my work ethernet cord in and have internet on both. Now all of the sudden I can only do one at a time. I have tried both cords, both ports and only can connect to one or the other when I reset the modem, even though both ports are lit up and recognized. Can anyone explain to me what has happened? Again, both ports and cords work, but only 1 at a time.