OpenVirtex网络虚拟化平台虚网识别机制的改进与实现

发布时间：2018-05-21 06:35

本文选题：网络虚拟化 + OpenVirtex　；参考：《北京邮电大学》2017年硕士论文

【摘要】：网络虚拟化技术是未来网络最重要的技术方向之一。通过网络虚拟化技术,网络服务提供商可在底层物理网络上创建多个虚拟网络,为用户提供多样化的可定制化服务。通过虚拟网络流量识别机制能够将物理网络资源划分为多个虚拟网络,并将物理网络中的流分割成多个互不相交的集合分配给不同虚拟网络处理,维护各个虚拟网络控制逻辑的独立性与流量隔离性。尽管学术界与工程界对虚拟网络识别机制这一课题的研究已经取得了一定的成果,但在虚网识别机制中仍然存在许多需要改进和完善的地方。现有虚拟化平台存在一个共同的问题,它们都是基于数据包中常见的字段或者字段组合去标识切片的,这必然要求强制性地对用户屏蔽掉相关字段,而这些字段对于不同要求的试验用户组,或许其希望去控制的字段也不同,这就需要能够提供灵活的虚网识别机制,也使得这一问题面临不小的挑战。本文针对这一问题,对OpenVirtex虚网识别机制进行改进与优化,以更加整体化、全局化的视野作为出发点,综合考虑实际应用环境中的各种限制条件与有用信息,通过动态的映射算法将虚拟网络映射至物理网络,具有任意拓扑结构的虚拟网络能力。支持多种虚网流量识别标签,形成机制更加完善、优化全局性更强、并可用于工程实践的虚网识别机制方案。这种更为灵活的虚网识别机制可满足绝大多数试验用户组的需求,大大地提高了网络虚拟化平台的可用性与可扩展性。
[Abstract]:Network virtualization is one of the most important technologies in the future. Through network virtualization technology, network service providers can create multiple virtual networks on the underlying physical network, providing users with a variety of customizable services. Through the virtual network traffic identification mechanism, the physical network resources can be divided into several virtual networks, and the flow in the physical network can be divided into several disjoint sets to be allocated to different virtual networks. Maintain the independence and flow isolation of each virtual network control logic. Although some achievements have been made in the research of virtual network recognition mechanism in the academic and engineering circles, there are still many areas that need to be improved and perfected in the virtual network recognition mechanism. There is a common problem with existing virtualization platforms, which are based on common fields or combinations of fields in data packets to identify slicing, which inevitably requires mandatory shielding of related fields from users. These fields may be different for the experimental user groups with different requirements, which need to provide a flexible virtual network identification mechanism, and make this problem face a great challenge. In order to solve this problem, this paper improves and optimizes the OpenVirtex virtual network recognition mechanism, taking a more integrated and global view as the starting point, considering all kinds of restrictions and useful information in the practical application environment. The virtual network is mapped to the physical network by dynamic mapping algorithm, which has the capability of arbitrary topology. It supports a variety of virtual network traffic identification tags, which makes the formation mechanism more perfect, optimizes the overall situation more strongly, and can be used in engineering practice to identify the virtual network identification mechanism. This more flexible virtual network identification mechanism can meet the needs of most experimental user groups and greatly improve the availability and scalability of the network virtualization platform.
【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】：TP393.01

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