Make a Federation with CloudStack

[MEHDI ALI SOLTANI]

Hi Dears Developers
I want to make a federation , I know the concepts but, I would like know the 
easiest  way with  CloudStack. 
Actually  my issue is send a request from for example cloud A to Cloud B , and 
cloud B fulfill the request as the requests which receive from it's customers. 
I think there should be a broker as a cloud exchange requests.
 
sincerely
Mehdi Ali Soltani