@Ke3ee How are you running speedtest.net? Their app (for Windows) or in a browser? They recommend using their app when your connection is fast as yours should be. I have 2 Deco M9 Plus behind an ATT...

@THop Tell us a bit more about the M5 and your LAN. Are the M5s in Router mode or AP? Which device in the network runs the DHCP server? Do you have other ethernet connected devices, and how are they...

I read this thread several times since the 'solution' was posted and didn't understand it (mostly because the diagram in the solution post was not clear which form was to be used). Then I followed...

Sorry for the late reply. I don't see whether you found a solution. I have a similar situation, and although it worked for months with no trouble, it has given me a fit the last two weeks. My LAN has...

This is a bit old, but I have an update to share. My Deco M9 has apparently restarted itself and changed the subnetwork (twice now). Each time it upsets my address reservations and most important,...

My experience creating address reservations is the opposite of that. My DHCP is set to 192.168.x.100 to 192.168.x.199 and I wanted to reserve 192.168.x.12 for a device. The Deco (M9 Plus) refuses...