虚实结合的虚拟网络实验平台设计与实现
发布时间：2019-07-05 19:26
【摘要】：2006年,为了推动校园网络创新,斯坦福大学首次提出了OpenFlow的概念。基于其网络可编程的特性,SDN概念应运而生。传统网络中,如果业务需求发生改变,需要重新配置网络设备,更新维护成本较高。SDN相较于传统网络,真正从物理上实现了控制平面与数据平面分离,网络由控制层集中管理,无需依赖底层的网络设备,更加适用于瞬息万变的互联网业务环境。近年来,越来越多研究机构向SDN领域投入大量科研力量。目前,SDN转发层已经有许多优秀技术,帮助用户搭建底层网络。然而还没有一个网络实验平台能够创建同时满足规模性和真实性要求的转发层网络。针对这个背景,本论文结合Mininet和Openvswitch两种开源技术的优点,设计了一个虚实结合的虚拟网络实验平台,为SDN领域研究者提供一个友好的实验环境。本文设计与实现的网络实验平台目标是帮助用户,便捷地创建一个大规模且真实性高的SDN转发层网络。相较于Mininet仿真平台,本实验平台能够有效解决Mininet上带宽和CPU资源的限制,用户可以在独立的Openvswitch交换机上运行程序、监听网络流量等。相较于Openvswitch交换机,本平台方便用户扩大网络规模,切换拓扑结构时不需要重新安装Openvswitch交换机。综上,本实验平台能够根据用户需求,灵活模拟各种网络拓扑结构,生成同时满足规模性和真实性要求的SDN转发层网络。为了实现实验平台,本文首先调研了相关技术,明确了系统的技术可行性。然后进行系统需求分析,梳理实验平台的功能性需求和非功能性需求。为了实现拓扑划分和拓扑下发两个核心功能,本文基于节点介数分析和重叠社区发现,提出了两种真实节点定位方法。同时,通过VxLan隧道技术,解决了虚实交换机间链路搭建问题。然后,完成实验平台的总体设计和编码工作,实现各模块功能和核心工作流程,并进行测试分析。最后,对论文进行总结,并为本网络实验平台提出了未来的研究方向。
[Abstract]:In 2006, in order to promote campus network innovation, Stanford University put forward the concept of OpenFlow for the first time. Based on its network programmable characteristics, the concept of SDN emerges as the times require. In the traditional network, if the service requirements change, it is necessary to reconfigure the network equipment and update and maintain the cost. Compared with the traditional network, SDN really realizes the separation of the control plane and the data plane physically. The network is managed centrally by the control layer and does not need to rely on the underlying network equipment. SDN is more suitable for the rapidly changing Internet business environment. In recent years, more and more research institutions have invested a lot of scientific research force in the field of SDN. At present, the SDN forwarding layer has many excellent technologies to help users build the underlying network. However, no network experimental platform can create a forwarding layer network that meets the requirements of scale and authenticity at the same time. In view of this background, combining the advantages of Mininet and Openvswitch open source technology, this paper designs a virtual network experimental platform which combines virtual and real, which provides a friendly experimental environment for researchers in the field of SDN. The goal of the network experiment platform designed and implemented in this paper is to help users to create a large-scale and high-authenticity SDN forwarding layer network conveniently. Compared with Mininet simulation platform, this experimental platform can effectively solve the limitation of bandwidth and CPU resources on Mininet. Users can run programs on independent Openvswitch switches, monitor network traffic and so on. Compared with Openvswitch switch, this platform is convenient for users to expand the network scale, and it is not necessary to reinstall Openvswitch switch when switching topology. In summary, the experimental platform can flexibly simulate various network topologies according to the needs of users, and generate SDN forwarding layer networks that meet the requirements of scale and authenticity at the same time. In order to realize the experimental platform, this paper first investigates the related technologies and clarifies the technical feasibility of the system. Then the system requirements are analyzed, and the functional and non-functional requirements of the experimental platform are combed. In order to realize the two core functions of topology partition and topology transmission, this paper proposes two real node location methods based on node intermediary analysis and overlapping community discovery. At the same time, the problem of link construction between virtual and real switches is solved by VxLan tunnel technology. Then, the overall design and coding of the experimental platform are completed, and the functions and core workflow of each module are realized, and the test and analysis are carried out. Finally, the paper is summarized, and the future research direction of the network experimental platform is put forward.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP393.02
[Abstract]:In 2006, in order to promote campus network innovation, Stanford University put forward the concept of OpenFlow for the first time. Based on its network programmable characteristics, the concept of SDN emerges as the times require. In the traditional network, if the service requirements change, it is necessary to reconfigure the network equipment and update and maintain the cost. Compared with the traditional network, SDN really realizes the separation of the control plane and the data plane physically. The network is managed centrally by the control layer and does not need to rely on the underlying network equipment. SDN is more suitable for the rapidly changing Internet business environment. In recent years, more and more research institutions have invested a lot of scientific research force in the field of SDN. At present, the SDN forwarding layer has many excellent technologies to help users build the underlying network. However, no network experimental platform can create a forwarding layer network that meets the requirements of scale and authenticity at the same time. In view of this background, combining the advantages of Mininet and Openvswitch open source technology, this paper designs a virtual network experimental platform which combines virtual and real, which provides a friendly experimental environment for researchers in the field of SDN. The goal of the network experiment platform designed and implemented in this paper is to help users to create a large-scale and high-authenticity SDN forwarding layer network conveniently. Compared with Mininet simulation platform, this experimental platform can effectively solve the limitation of bandwidth and CPU resources on Mininet. Users can run programs on independent Openvswitch switches, monitor network traffic and so on. Compared with Openvswitch switch, this platform is convenient for users to expand the network scale, and it is not necessary to reinstall Openvswitch switch when switching topology. In summary, the experimental platform can flexibly simulate various network topologies according to the needs of users, and generate SDN forwarding layer networks that meet the requirements of scale and authenticity at the same time. In order to realize the experimental platform, this paper first investigates the related technologies and clarifies the technical feasibility of the system. Then the system requirements are analyzed, and the functional and non-functional requirements of the experimental platform are combed. In order to realize the two core functions of topology partition and topology transmission, this paper proposes two real node location methods based on node intermediary analysis and overlapping community discovery. At the same time, the problem of link construction between virtual and real switches is solved by VxLan tunnel technology. Then, the overall design and coding of the experimental platform are completed, and the functions and core workflow of each module are realized, and the test and analysis are carried out. Finally, the paper is summarized, and the future research direction of the network experimental platform is put forward.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP393.02
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