@russel0531 EAP won't change device IP, it's running on layer 2 data link layer. If there is no Internet, you should check the connection between EAP and the main router. All network comes from your...

@leki389 I do not have a good solution for you, but I can confirm on tplink router, backup WAN only take effect when the primary WAN totally offline. So it may won't help your situation. I'm thinking...

@brizzio I believe it's the same like this thread.

@Stef_Funaro Are you able to visit your website from outside of the tplink network? If you can, it seems like a NAT loopback issue. But anyway you should try to upgrade the firmware to the newest....

@djwujek Only Cloud Based Controller require devices' SN. For OC300, if the omada devices and the controller are in different network, you can use Discovery Tool to add the device. For example link.

@tekbird Try the Omada Controller, you won't regret it. Many features are only available with the Controller.