Hi, following set-up:

4 Deco E4R units with latest software release.

Main Deco E4 -> Access Point Mode, connected to router, connected to ISP

3 secondary Decos connected to main Deco.

Had some trouble setting up the 4 units because everytime when I turned the main Deco from the default Router Mode into Access Point I wasn't able to connect the secondary units. After finishing the set-up for the secondary units when they tried to connect (flashing blue turns into blinking red) they were not able to re-connect to the main unit again (turns to steady red). I realized that the main Deco has to stay in router mode until the last unit is connected then I was able to switch from router to AP. After a couple of minutes with the Internet connection going up and down it became stable.

In the second step I wanted to connect Ethernet Backhaul to one unit with the result that the Internet Connection of the Mesh network went up and down forever while a Wlan client (Smartphone) tried to cennet to the WLAN endlessly. DIsconnecting the Ether Backhaul immediatley re-connected the Wlan.

The Ethernet Backhaul is using a connection through some cascaded hubs but all devices connect in the same way (i.e. TV set) works perfectly fine.

A Deco unit that is connected in two ways (MESH and Lan cable) has to use differnet IP adress for the different interfaces. As such I think that the unit has a problem with resolving the right adress and gets in trouble with the DHCP server running in the router. But as I don't have any way to troubleshoot the problem (no support through the app) I don't know how to tackle the problem.

Has anyone any experience with symptoms like this? I tried to set fixed IP adresses for the units - no fix. I did reset the whole set several times - no fix.)BTW: I get the feeling that with every reset it takes longer to set-up the units!)

Any idea? Is there a way to "downgrade" the units to an earlier firmware version just to try an installation from the very beginning? Does the reset button really resets everything into factory default? Or is there another way to reset to "0"???

Any suggestion or help is much appreciated.

Thanks in advance

Lutz