@Christoph151224 Hi, thanks for your efforts and sharing~ May I confirm the model, hardware and firmware of your range extender?

@KittTPL Hi, according to the official website I shared, the lastest firmware is Archer MR600(EU)_V2_240716, which seems different from what you shared above. It is suggested to follow "Local...

@Matthew3798 Hi, it is pity that the powerline backhaul can not take its biggest effect in your environment. Apparently, Ethernet backhual can provide more stable and fast speed compared to...

@PureITy Hi, thanks for your sharing~ Yes, your router got a private IP instead of public IP, which is the reason.

@mousehunt Hi, thanks for your detailed update. Is your Archer C9 only used for connecting wired client devices? If you remove C9, do same problems remain? At the same time, to assist you...

@mkfzdmr May I know the model of your another TP-Link product? Is it also a wireless router? If you set it up with VLAN ID 0, can you get internet access from your ISP to that product?