Hi, 

Running a 3 m5 network on 3 floors. Router mode, ethernet backhaul. After network setup, wifi speed tests for all the 3 decos showed 520-530 down on fast.com. Then added devices,laptops, cameras accross all 3 floors.

Ground floor seemed a little slow so tested and today the main deco wifi shows 200 down. Reboots did not solve anything  Satellites are still at 520-530. Deco app speed test shows 620 down. 

What could be going on ?

Thanks