I have purchased 6 Deco X50. I have one connected to my modem router and then connected to a TP 8 port Switch, the other Decos are then connected via ethernet around the house leading back to the switch. When I use the app to view my network, it says the decos are connected wirelessly. 

Is this because it does not support a switch ? or do I have to do something else to set it up.  When they work wirlessly the signal drops and is flaky due to the thickness of the cottage stone walls.