@Baru 

For that to work, you will need to configure Deco mesh to run in Access Point mode: Switching a Deco to Access Point (AP) Mode

  @Alexandre. It's already in the Access Point mode.

  @Baru 

This should work in Access Point mode, there are no other configuration changes to make in Deco app.

To make sure nothing is wrong with Ethernet cables, bring both Deco units to where Archer router is and connect them to Archer using very short Ethernet cables: 1 meter (2 feet) or less.

If you have short Cat 5E or Cat 6 cables, or even Cat 5, use them for that test. 

  @Alexandre. I've already tested the cables and the ports itself, when I connect a cable to the port it works as expected. I have also exchanged the RJ45 cables between devices just to make sure. Also I've connected one deco straight into the other one, and it was showing that it's connected via ethernet. The only problem is when I try to connect them to the router.

  @David-TP Thank you, I'll keep an eye on my e-mails. :)

  @David-TP Hello David,

I have turned off the Easy Mesh option and it seems like everything is working fine. I can see in the app that the second Deco is connected via ethernet.

On the other hand I think that there is a bug in the smartphone app, easy mesh was disabled there, but I decided to double check with browser configuration and it was still showing as enabled. Now I'll let it run for a couple of hours to check if there are no issues, and turn off Wi-Fi on the Archer C6 completely to not interfere with Deco units.

Thanks!