I can't connect like this :(

@drew1998 i don't think the switch is the problem (netgear brand new switch unmanaged)... deco are prioritizes wifi over ethernet backhaul...

@Alexandre. This is the current setup

I just connected all the cable to an unmanaged switch and used the Deco as router (PppoE), the other 2 units are still using wireless to connect to each other instead of using the wired connection.

@Alexandre. All the deco devices are connect to the same ISP router (adb VV5822) through a CAT5E cable... Can I change any settings on the ISP router ?

@Alexandre. There is any way to make it work with an external switch ?