Andreipr wrote So, case 1: the advantage to turn off the non Deco router it's to be sure that the the devices will connect always to a wifi6 wireless network generated by Deco device, right?...

@SanderBun That means, wired link is good, but some Deco settings must be throttling traffic. Check the QoS value in Deco app and if it is less than 500, set it manually to 500. That might work. See...

@Peterdu There is known case when WAN IP or WAN DNS IP is from the same IP segment as LAN. I thought it might be the case here, but it is not. If you try different LAN IP range, for example...

@SanderBun With Deco M9 Plus, you can run "Test Internet Speed" from Deco app, which can be found under More. Not every Deco model has that feature, but M9 Plus does. That will report the speed of...

@Peterdu Peterdu wrote My setup: WAN: Bridge Mode LAN IP: 192.168.2.254/24 DHCP Server: Start IP: 192.168.2.50 End IP: 192.168.2.250 What is your Main Deco WAN IP and WAN DNS servers IPs? See...

@Andreipr In Access Point mode, Deco mesh runs its own WiFi network. It will not expand non-Deco router WiFi network. Because of that: Case 1 will work, and Deco X60s will form WiFi 6 network. You...