When connecting a Joey over cat5 are there any settings to change or is it plug and play? Also can it be run on a LAN that does not have internet conection available (i assume it will as it's just a Hopper to Joey link)? Has anyone had issues with cable lenght on cat5?
I would make sure that the coax is connected and operating first, then add the cat5 and let it obtain an IP address. Then unhook the coax. I'm not sure about running it on a segment of network that does not have internet access, but at the same point I would want to ask why not give that segment of network internet access? Its very easy to do and it would also keep you from having two routers/DHCP servers. If it's that you don't want the hopper/joeys to have internet access, I would just leave them on the MOCA network and not hook up the hopper to it. Cat5 cable length is 100 meters (328 feet). If you need to go further than that, I would look into setting up a wireless bridge.