I wanna thank @bigmassa and @adamantios for there posts here. This helps solving my problem. https://forum.tp-link.com/showthread.php?109449-Problems-with-RE450-connected-to-Archer-AC1900-C9

update: Hopefully i finally find the solution. I switched off DHCP Server in RE450 and set manual IP address. It works now for 11 days without repeater blocked. I can't really understand why DHCP...

Excuse me, but refering to FAQ is quite useless in this case. In my opinion it is a bug in the firmware. Due to high sporadic problem repeater is blocked internal until power off/on reset. Can...

Model : Hardware Version : Firmware Version : ISP : Hi, first i have to apologize myself for bad english knowledge, but hopefully you will understand. My Wifi configuration is: Wifi Router TP Link...