@Dunk-c Probably AX20 v3 is with a different WebGUI. Try the following: Switch to route mode, setup TP-Link ID and then switch back to AP mode - then test. Some of the features configured in router...

@Dunk-c Missing Advanced menu is usually a sign that you're using the router in AP mode. Is that the case ? If that's the case you should know that some features are not available when the device is...

@lMarcel You probably describing a topology like this one: If that's the case switch your Deco in AP mode.

@Dunk-c Login through the web management interface this menu should be here:

@yasreddy That seem like a cabling issue. Try replacing the cable that goes to your C50 WAN port. If the issue persists you can contact your ISP for further assistance.

@Ghost-Fire WDS could be tricky to configure due to its non-standartized implementaion accross different vendors. As for the VPN server feature its better to replace the Archer C6 for Archer C6U if...