一种针对SDN网络的测景系统
发布时间：2018-09-18 17:00
【摘要】：软件定义网络(SDN)是一种新型的网络架构,具有控制和转发相分离的特性。OpenFlow是一种比较成熟的SDN网络实现方式,由OpenFlow控制器和OpenFlow交换机组成,控制器拥有全局的网络拓扑,能对网络进行集中控制和管理,交换机则负责根据控制器下发的流表匹配数据包并执行转发或接收等操作,实现对网络更加细致的管理。当前针对SDN网络的测量方案都有一定的局限性,没有充分结合SDN网络的特点和优势,不能对SDN网络进行全面的、方便的、灵活的测量。论文设计了一种针对SDN网络的测量系统,充分结合了SDN网络的特性和优势,将测量模块的控制逻辑和转发逻辑分别部署于控制器和扩展的交换机中,利用扩展的OpenFlow协议定义测量消息,实现以软件定义的方式定义测量任务,完成对路径的时延、丢包率等指标的测量,更加灵活方便。论文利用搭建的小型虚拟网络进行验证和测试。先验证各个模块的功能是否能够正确实现,然后在各个模块的功能均能正确实现的基础上,对整个测量系统进行了集成测试,在虚拟网络内完成时延和丢包率等网络指标的测量。通过对网络内传输的测量包的捕获和分析,可以得到测量包的时间戳信息、选路信息、排序信息等,并得到时延和丢包率等测量结果。由解析的信息和测得的数据可知,该SDN的网络测量系统能够实现对SDN网络的测量,与预期的结果相符。
[Abstract]:Software defined network (SDN) is a new type of network architecture. OpenFlow is a mature SDN network implementation mode with the separation of control and forwarding. It is composed of OpenFlow controller and OpenFlow switch. The controller has a global network topology. It can control and manage the network centrally, and the switch is responsible for matching the data packets according to the stream table sent by the controller and performing the operations of forwarding or receiving, so that the network can be managed more carefully. The current measurement schemes for SDN network have some limitations, not fully combined with the characteristics and advantages of SDN network, can not be comprehensive, convenient and flexible measurement of SDN network. In this paper, a measurement system for SDN network is designed, which combines the characteristics and advantages of SDN network. The control logic and forwarding logic of the measurement module are deployed in the controller and the extended switch, respectively. The extended OpenFlow protocol is used to define the measurement message, to define the measurement task in the way of software definition, and to measure the path delay, packet loss rate and so on, which is more flexible and convenient. The paper uses the small virtual network to verify and test. First, verify that the functions of each module can be realized correctly, and then, on the basis of the correct realization of each module, the integrated test of the whole measurement system is carried out. The measurement of network parameters such as delay and packet loss rate is completed in the virtual network. Through the acquisition and analysis of the measurement packets transmitted in the network, the time stamp information, routing information and sorting information of the measurement packets can be obtained, and the measurement results such as delay and packet loss rate can be obtained. From the analytical information and the measured data, it can be seen that the network measurement system of SDN can realize the measurement of SDN network, which is in accordance with the expected results.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP393.0
本文编号：2248554
[Abstract]:Software defined network (SDN) is a new type of network architecture. OpenFlow is a mature SDN network implementation mode with the separation of control and forwarding. It is composed of OpenFlow controller and OpenFlow switch. The controller has a global network topology. It can control and manage the network centrally, and the switch is responsible for matching the data packets according to the stream table sent by the controller and performing the operations of forwarding or receiving, so that the network can be managed more carefully. The current measurement schemes for SDN network have some limitations, not fully combined with the characteristics and advantages of SDN network, can not be comprehensive, convenient and flexible measurement of SDN network. In this paper, a measurement system for SDN network is designed, which combines the characteristics and advantages of SDN network. The control logic and forwarding logic of the measurement module are deployed in the controller and the extended switch, respectively. The extended OpenFlow protocol is used to define the measurement message, to define the measurement task in the way of software definition, and to measure the path delay, packet loss rate and so on, which is more flexible and convenient. The paper uses the small virtual network to verify and test. First, verify that the functions of each module can be realized correctly, and then, on the basis of the correct realization of each module, the integrated test of the whole measurement system is carried out. The measurement of network parameters such as delay and packet loss rate is completed in the virtual network. Through the acquisition and analysis of the measurement packets transmitted in the network, the time stamp information, routing information and sorting information of the measurement packets can be obtained, and the measurement results such as delay and packet loss rate can be obtained. From the analytical information and the measured data, it can be seen that the network measurement system of SDN can realize the measurement of SDN network, which is in accordance with the expected results.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP393.0
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