@PasBoh Have you tried to disable the TL-WA850RE DHCP server so the only DHCP server in your network be the TL-WR840N's. Reboot the TL-WR840N, after that reboot TL-WA850RE and test if there's an...

@HorseCollar I wouldn't know that - you can try it yourself. But as I posted before: "That's why it's a good idea to write down your current settings (in notepad for example), just in case."

@minislayer Looking at your AP configuration and given the fact that your network topology is pretty simple, I can't see any obvious reason that will cause a loop in your network. It would be best if...

Coriander wrote For the DNS queries they cycle through the following hostnames in random order: "wikipedia,org", "amazon,com", "reddit,com", "bing,com", "linkedin,com", "live,com", "netflix,com",...

@KaoLat Try @QRene suggestion about using the WPS method (video guide).

@minislayer Can you tell us where the TP-Link WA1201 is connected to - directly to your main router or some other device (describe your network infrastructure) ?