You need to:
1- Set an SNMP read string on the controller
2- Add the Controller in Airwave using Add Device(s)
3-Put the ip address of Airwave in the controller
Step 1 and 2 sets up Airwave to poll the controller via SNMP
Step 3 sets the controller to push a data feed (AMON) to Airwave
Step 3 will not display any data in Airwave until steps 1 and 2 are completed.