After tplink WDS bridging, the WAN port displays "no network connection "?

After two wireless routers (WDS) wirelessly Bridge, the secondary router (the router with the WDS function enabled) is used as a wireless signal amplifier. At this time, its WAN port cannot be used. Different types of routers have different prompts:

The "WAN port without network connection" or corresponding identifier is displayed on the general management interface, as shown in the figure below:

Tip type 1 (a few vrouters)

Tip type 2 (most routers)

After a successful wireless bridge is established, the primary and secondary routers communicate with each other through wireless signals. The WAN port of the secondary router is unavailable and the access of terminal devices under the secondary router is not affected.