@ThomasKramer There "might" be a firmware update that addresses this but since I cant see the region your in going to tag one of the tp-link staff who can see this info. @David-TP

@NCR2025 How would you like it to update?

@herbertpocket Going to guess you have a bad cable or the switch isn't compatible with deco ethernet backhaul See if the trouble shooting steps in this post help...

@David-TP

@David-TP

@Claire56 Few things to try. 1. Turn off the 5 GHz band by going into the deco app then click on More > WiFi Settings > 2,4 Ghz & 5 GHz Network > Advanced > Band > Uncheck 5 GHz and see if it will...