Patt,
No, when it comes to the DFF1, there would be no difference on settings with a NavNet 1 versus a Vx2. There is no doubt you have a communications problem. We just need to find the issue and solve it. It is not uncommon to run into an issue like this with an off the shelf hub. Besides not being designed for boat power, these hubs generally do not have auto sensing ports like the Furuno Hub101. This mean you really have to watch what cables you use. (Straight & cross-over) The currently shipping DFF1 units are shipped with a RJ45 to RJ45 network cable (part# 000-167-176). That cable is a cross-over cable to allow it to connect directly to a unit like the NavNet 3D MFD12. If all of your other connections to the Netgear are straight, the hub does a cross and then the cross-over cable to the DFF1, results in an overall straight connection between the DFF1 and the NavNet 1. This won't work because the send lines are going into the other units send lines, instead of the receive lines where it belongs. Without knowing all of your cabling, I think you can solve the issue in one of two ways. 1.) Replace the cross-over network cable from the DFF1 to the hub with an off the shelf straight cable from a normal computer or department store. 2.) Keep the existing cable, but add a cross-over adaptor between the cable and the DFF1. You can normally pick up a cross-over adaptor at places like Circuit City, CompUSA, Best Buy, Staples etc... Adding a Cross-over to a cross-over cable will un-cross it or make it a straight connection. I hope that makes sense. :questions
