Motorola AP-51XX Product Reference Manual page 615

9.3.1.3 Configuring AP#3
To define the configuration for AP#3 (a client bridge connecting to both AP#1 and AP#2
simultaneously):
1. Provide a known IP address for the LAN1 interface.
2. Assign the maximum value (65535) for the Mesh STP Priority.
Configuring Mesh Networking 9-27