网络实验床中的虚拟化技术研究综述

A Survey of Virtualization Technology in Network Testbed

网络技术的研究和发展需要灵活、开放和便捷的测试环境,同时还要有充足的网络资源和计算能力来满足各种网络测试和研究的需求.虚拟化技术在网络实验床的应用有效的解决了上述问题,成为网络实验床领域的主要研究方向之一.网络实验床采用虚拟化技术进行实验资源管理,可以实现多实验的并发处理和隔离.首先介绍了网络实验床、虚拟化技术和SDN的概念,然后对传统网络虚拟化技术和SDN网络虚拟化分片技术进行了性能的分析,并且还对两类技术的特点从不同的维度进行了总结和归纳,重点分析了基于SDN网络的虚拟化分片机制,最后提出了未来网络实验床虚拟化技术发展的关键问题.

The research and development of network technology need a flexible,open and convenient test environment,but also has sufficient network resources and computing power to meet the needs of various network testing and research.The application of virtualization technology in network testbed effectively solved the above problems and became one of the main research directions in the field of network testbed.The network testbed uses the virtualization technology to carry on the experimental resource management,and it can realize the multitask concurrent processing and the isolation.Firstly,the concepts of network testbed,SDN and virtualization technology are introduced.Then,the performance of traditional network virtualization technology and SDN network virtualization slicing technology is analyzed respectively.The characteristics of the two types of technology are also summarized and concluded from different dimensions.And the virtualization slicing mechanism based on SDN is analyzed emphatically.Finally,some critical issues that must be addressed in the construction of the SDN testbed are identified.