@Joerg2112 In your case, may I know your network diagram in detail? Which Deco is connected to which, by wired or wireless? When you test the wired speed, which Deco is the laptop connected to by an...

@HJB2020 Please help to confirm the following information about your problem. 1. What is the current network diagram? 2. What is the led status of the Deco P9 when you lost connection? How do you...

@TheFieldings You can refer to the link below to have a try. https://www.tp-link.com/support/faq/2718/

@Iconic In your case, please help to confirm the following information. 1. What's the firmware and hardware of the three Deco M5? What's the firmware of the two Deco M9 Plus now? 2. When the...

@yahwem What's the model number of your TP-Link product? How about the speed do you have from your ISP? How about the speed when you connect to your TP-Link device, wired or wirelessly?

@Garadiff Here is the instruction to set up an IPv6 connection on the Deco. https://www.tp-link.com/support/faq/2642/