@Machineage With that detailed description and a floor plan it would not be hard to provide proper recommendations. ------------- Type of Deco units (Deco model). For Internet speed of 100Mbps there...

@phad Yes, too much of a mess. I don't think I can offer any more help. I think the best would be for you to discuss these findings with your ISP Tech support and ask for explanation. The Internet...

@phad Can you give me a hint which one is right and which one is not? Also, one more test: connect same laptop with Ethernet cable to Main Deco, so that it connects to Internet through Main Deco, and...

@Decoxe75pt This Deco model has Ethernet backhaul. More info on the topic of Ethernet backhaul can be found in the following TP-Link FAQ: General questions about Ethernet Backhaul feature on your Deco

@Maddogg69 Question: do you own this "dual band gigabit wifi 6 router," or is it provided to you by ISP? If it is your router, you must know how (configuration settings, etc.) it is connected to ISP...

@phad I am reluctant to offer anything related to Deco mesh configuration. This is what you can do: 1. Connect laptop to free Ethernet port of "the box." Verify laptop has Ethernet link and not using...