RAP-3 have only 1 radio module :manembarrassed:
- it's cannot support mesh access and mesh backuhl.(it will not be able to connect to your mesh and on the same time give service to nearby clients)
Is not possible with a RAP3 since is not dual radio like IAP135 or 105
The mesh is built using the 5 ghz band
The iAP 104/105 will do what u need and asking for.
Keep and mind to do a good site survey - choose the right ant - and of course - make sure that all your deployment based on whether-proof wiring/AC/Poe/ant/pole.
regards.
Me.