Thank you very much it worked. Just changed RJ45 on both sides and it worked

@Alexandre. Alright, let me try to replace them. We'll be back

Hey guys, So we got a apartment with 3 piece of Deco S4. It goes like this: HUAWEI GPON router --- Deco S4 --- Deco S4 --- Deco S4 --- wired 1st and 2nd Deco found themselves and made ethernet...

@Alexandre. Awesome, thank you very much for the clarification.

Hey guys, We have 3 pieces of S4 wirelessly connected with each other and using access point mode. We want all of them to have 100% of speed, so we're planning to wired them all together. But in deco...

Ok, that was not the smartest move by TP-LINK or the person, who decided to do that