  The IP network is time-consuming for configuration and troubleshooting
because it requires access to every device command line interface (CLI) or
Graphical User Interface (GUI). In other words, the control plane (gathering
information to forward data) and data plane (data forwarding plane) are run on
every intermediary device. To solve this problem, the software defined network
emerged and separated the control plane (done by software) from the data plane
(done by hardware) [1]. In addition, the control plane is operated in the
central point named the controller. There are many controller software programs
in simulation and production network environments. In this paper, we compare
three open source controllers called POX, Floodlight and Opendaylight (ODL) in
simulation network created by MININET SDN emulation program in terms of TCP and
UDP throughput and average Round Trip Time (RTT) of the first packet of the
flow in the mesh and tree topology.
