I have a basic setup. Two laptops, a tower in the closet, and a raspi as a setop box. The raspi is a recent purchase  It is directly connected to my 3800 running CeroWrt Modena 3.7.5-2. I can only connect to other machines that are simultaneously on a particular interface. Like the laptops on 2.4 ghz can file share, but can not see the tower on 5 ghz. I really need to ssh into the raspi on eth from 2.4 ghz or 5 ghz. I reinstalled the firmware, and also reset the setting from the system menu.