@AdamTal What you describe points at switch which might not be compatible with Deco backhaul. There had been other reports when one or two Satellite Deco can use wired backhaul, but not all of them....

@Evrard If you plan to run your Deco mesh on powerline backhaul exclusively, would you consider Deco P9 instead? These are similar specs as S4, but P9 has integrated powerline backhaul. You would not...

@Qis If you can take your S4 back - take them back and buy Deco M5 set instead. Deco M5 has firmware 1.6 which will allow you to configure how Deco nodes connect to each other.

@Evrard Yes, it does. Because E4 has 100Mbps Ethernet ports, its Ethernet backhaul speed will be limited by that. More info about Deco Ethernet backhaul can be found here: General questions about...

@RajatBoon Your Deco M9 Plus has old firmware. It is version 1.2.12 from 2019, three years old. The latest version is 1.5.6. When you update M9 Plus to the latest version, you'll see the option to...

@Jonathan1115 The only special case I know of is Deco WiFi 6E capable devices: AXE11000 Deco XE200/Wi-Fi 6E Deco Mesh System According to TP-Link FAQ, it appears on these devices one can create a...