Hi, 

I"m trying to get better signal from downstairs where modem/router sits to upstairs.  I was able to get wifi mesh to work but I'm wondering if I could get better signal upstairs if I wired the units with ethernet cable.  The challenge is that it will be hard to get cable from modem/main deco to upstairs unless I go from main deco -->wifi--->deco 2---ethernet to upstairs-->deco3--->wifi to other deco units.

Will this work, or does the ethernet backhaul only work if units are connected to main deco by ethernet:

Modem/router--ethernet--main unit--ethernet---deco2---ethernet---deco 3---etc.

Thanks for your assistance!

Andy