Configuring Bridge in Cisco AP

Add AP Mac Address in Security-MAC Filtering

Make sure that WLC is configured with single country code, Mesh AP will not join WLC if it has more than 1 country code configured.

Configure Both AP Mode to Bridge

When an AP Joins WLC go to AP and select RootAP - AP which will be connected to Wired end.

When an AP Joins WLC go to AP and select MeshAP - AP which will be creating backhaul connectivity using wireless and which does not have flexibility to connect Wired network.(could be turned on by Power Adapter or Power Injector)

Check the neighbor details by going at the end of AP, click on neighbor information tab.

Parent is configured as RootAP and the Child is configured as MeshAP

Parent

Child

That is all about basic configuration of Bridging.