Hi, 

I have a network of mesh Deco M9 + 

and I'm running a cable from upper to lower floor for back haul connection, the main deco is on the upper floor, 

when i tryed the cable connection directly on a laptop with Ethernet port I was getting full speed, around 300Mbps , but when I connect the deco unit and test the speed on the laptop or phone, it drops to 30-50 , so I assumed there is an issue with the deco unit I'm using, and I tried differnt units, tried 3 of them, but nothing was changing, I would appreciate any help , Thank you