@valiant3600 There are many reasons why some devices might not like or can't handle WiFi mesh. How about I suggest you a workaround you could try instead? First, question: do you have Deco S7 unit...

@ahmetm Please open 2nd Floor Deco info page in Deco app, and post its screenshot here. This is the example of Deco info page I am asking you to share:

@stepgimb When Deco product description says "Gigabit" it means "1 Gbps." Also, there are multiple X50 models: X50 - 3× Gigabit Ports X50 Pro - 2× 2.5 Gbps Ports X50-PoE - 1× 2.5 Gbps port + 1×...

@DSER To add to the above. For connection type, see Step 11 from this FAQ: How to use Deco with your existing router

@DSER 1. TP-Link Deco mesh WiFi will not join Archer AX2300 WiFi. After configuring Deco mesh, you will need to turn off WiFi in Archer AX2300, otherwise you'll end with two different WiFi networks...

@HustiUK TP-Link Deco does not support OneMesh. See this document for more info: TP-Link Deco Mesh vs EasyMesh vs OneMesh vs Omada Mesh What's the Difference?