Hi,

I have a 4 floor house, and bought 4 Deco X50 PoE units (one for each floor). I set them up in the following way:

ISP modem -> Main Deco -> TP Link TL-SG-116P switch -> 3 satellite Deco units. They are in Router mode.

The satellite units are powered via PoE (cat6 cable directly from the switch), however Ethernet backhaul does not work, and instead they connect wirelessly. I tried plugging one of the Decos with the adapter as well, and the Ethernet backhaul started working for it. 

Is this not expected to work (PoE and EB from the same port) or is this an issue with the switch not supporting it?

The cables are all brand new and I have tried switching ports around, but with no success.

Can anyone help here?