@pajtaz The good news is, tplink also notice this issue, and we will see the update soon.

You can try MAC clone function and copy the MAC address from your old R600VPN router‘s WAN port. MAC clone will make modem think you actually still use the "old router".

@Hugo00 You may need to check the Ethernet connection from your router to the root CPE. All Internet comes from your router. Maybe try a shorter Ethernet cable, or another port on the router. Other...

@Menyu Yes, insturction link

@Unraider In normal case it means your IPv6 service is ended. You can try to connect PC to the Modem directly and check if you have IPv6 service.

@IsakMu Yes, they can work without Omada router. However some of the advance settings(related to gateway) on Controller will not be available