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.
翻译：IP 网络在配置和排除故障方面耗时,因为它需要访问每个设备命令线界面(CLI)或图形用户界面(GUI) 。 换句话说, 控制平面( 收集信息到转发数据) 和数据平面( 数据转发平面) 运行在每个中间设备上。 为了解决这个问题, 定义的网络出现并分离了控制平面( 通过软件连接软件) 与数据平面( 通过硬件连接) [1] 。 此外, 控制平面是在名为控制器的中心点操作的。 在模拟和生产网络环境中有许多控制器软件程序 。 在本文中, 我们比较了由MININET SDN 模拟程序创建的3个开源控制器, 称为 POX、 Floodlight和 Opendaylight (ODL ) 。 在模拟网络中, 3个开源控制器被称作 POX、 Fladlight 和 Opaylight (ODL) 模拟控制器, 模拟控制器, 程序由MINNDNDN 和UDP 模拟程序在MES和树表和树表和树表图图图表中第一个流的第一个组合中, 的输入和平均和平均回程的平均和平均回翻时间(RTTTTTTTT) 。
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