@AndreasDpunkt If you can, configure Deco mesh to run in Access Point mode, and check again. Switching a Deco to Access Point (AP) Mode ----------------------- I have Deco M5 hardwired to the ISP...

@AndreasDpunkt On your NAS, check what it reports for the negotiated speed of its Ethernet ports.

@COiSman You must have ISP router that you configured with 10.0.0.* IP range. You connected Main Deco to it. You want devices that connect to Deco mesh to be in the same 10.0.0.* IP range. If this is...

Meshdave wrote @David-TP One further thought - I have been experimenting with Adguard running on my Home Assistant machine (an advert filtering DNS server), but I have not configured the router to...

@RGaskell I thought about one other thing you could try with your Deco M4 mesh. Your Main Deco is connected to the router (not modem). That means, you can switch Deco mesh to run in Access Point...

@RGaskell Deco M9 Plus is quite a good choice. I went with that for my Deco mesh when I had 300Mbps Internet link, then upgraded to 500Mbps and later to gigabit. While M9 Plus can't deliver gigabit...