Noobie----I have a Motorola Surfboard 6580 in basement as main router with incoming cable TV and internet hooked up thru it. I have a Linksys ea4500 that I got for wifi media streaming but have since hardwired smart TV, AV amp, and blue ray player with powerline amplification thru basic switch. I need ea4500 for better wif signal upstairs and would like to have a home network where I can see all devices connected to network (laptop/desktop/printer/external storage). House is hard wired except for area where TV is with powerline amplification and switch. How would I accomplish this? Bridge/cascade, or is there another way? When ea4500 is connected to internet all I see is devices using ea4500. Please assist.