Specific Protocol between the controller and the OF switches. And a set of operations/messages sent to the switches.
1.4.0, 1.3.2, 1.3.1, 1.3.0, 1.2, 1.1.0, 1.0.0
http://www.valleytalk.org/wp-content/uploads/2013/02/Evaluation_Of_OF_Controllers.pdf
Características e funcionalidades