@KlausDetlef Are you sure the problem got resolved? Did you run speed checks? I had the exact same problem and I replaced my main deco with an M5. But still i get less than 100Mbps on my slave Deco...

@PerryJankie Hi, I have the same issue. So I think if I replace my main Deco E4 with an M4 (Or any other deco that has gigabit port) and keep my existing decos as slave decos, the problem should be...