@LukePL You are saying that when Deco nodes on a certain floor are wirelessly connected to the rest of Deco mesh, this somehow messes all office LAN, wired and wireless. This is easy to test: when...

@dickymoo It is possible your laptop and workstation prefer 2.4GHz WiFi band. This band is slower but it can allow devices to connect on farther distances. Disable 2.4GHz in Deco Main Network,...

@Ranb There is something strange going on, because with that network diagram there is no way devices connected to the switch will get IP addresses from Host Router. This is what I would suggest:...

@Ray072 This is what I can tell you about current state your Deco mesh, based on screenshots you provided. Having Deco M9 at 2 bars is OK. You will almost never get three bars, they must be really...

@Ray072 You shared Show List screenshot. This is what I needed, but please also give me Show Map screenshot. It appears "Schuur" decide to connect to Main Deco again, which is wrong, but I can't tell...

Ray072 wrote I have 2 Deco's on 2 of 3 bars signal and 1 Deco on 1 of 3 bars @Ray072 Please share your current Show List and Show Map from Deco app. After you removed powerline adapters the next step...