Unlike a traditional network architecture, Software Define Network (SDN) provides central control over the Network. When network visibility and network device programmability is concerned, standard documented open flow enabled physical or open vSwitch is a priority. Because of the central control over the network devices can be programed for different functionality of network application such as switches, routers, firewall and load balancer. One can program a network switch even though it is physical or virtual switch which supports standard southbound API interfacing to controller like open flow to act as hub, switch, firewall, etc. using those network application which can be interfaced with restful API to the controller platform choosen. In this paper, we study the behavior of different network functionality such as hub, switch, firewall and load balancer of open vSwitches over the SDN in linear topology. To create required virtual environment, we used mininet a network emulator tool for analysis and demonstration for network behavior of open vSwitches as hub, switch, firewall and load balancer role by running pox controller remotely outside the network of topology running machine and analyzed whether does it affect on throughput if we run our controller locally or remotely outside network boundary e.g. running on AWS cloud.
