@pysh Use this guide in your case. Depending on your topology select Case 1 or Case 2. In Case 2 a port-forwarding has to be done and there's a link how to do that.

@Sam_Maran You've found the correct configuration guide for building WDS on your W9960. You may try to use DHCP relay instad of disabling the DHCP server poited to to your main router IP address: WDS...

@tttg Better contact Optus. They will tell you if your modem is compatible with their service and how to set up your AX55 Internet connection type.

@Guima_br I would suggest to open your own thread for more clarity on your request. If your ISP modem is not in bridge mode the AX73 and RE505x would see each other without setting a route in the ISP...

@Ricov40 If you plan to extend your Archer A6 guest network in a mesh with a range extender, this won't work. You can extend a guest wireless network only in a regular range extender mode - check...

@AJPC That's possible but not recommended: