基于OpenFlow的软件定义网络虚拟化方案  

Software defining network virtualization scheme based on OpenFlow

作　　者：张衍志[1] 叶小琴[1] 梁刚[2] Zhang Yanzhi;Ye Xiaoqin;Liang Gang(Sichuan Engineering Technical College,Deyang Sichuan 618000,China;Sichuan University,Chengdu 610065,China)

机构地区：[1]四川工程职业技术学院,四川德阳618000 [2]四川大学,成都610065

出　　处：《计算机应用研究》2018年第11期3377-3381,共5页Application Research of Computers

基　　金：四川省教育厅重点项目(17ZA0238)

摘　　要：软件定义网络(SDN)可以将网络控制平面与数据平面分离开来,为网络虚拟化提供了良好的平台。为了解决SDN中多租户下的虚拟化,提出了一种基于OpenFlow的网络虚拟化方案。通过一个中间代理来转换并匹配物理MAC地址与虚拟MAC地址,以及物理流表项和虚拟流表项,以此实现流量空间的虚拟化。其中,根据实际数据包的惰性计算,使用前缀或通配符来精确匹配流表项。另外,为了保障物理OpenFlow网络上不同租户之间的隔离,将单个虚拟MAC-通配符流表项映射为多个具有精确MAC地址的物理流表项。实验结果表明,该方案成功地实现了网络虚拟化,且虚拟化开销较小,具有可行性。The software definition network(SDN)can separate the network control plane from the data plane,and provides a good platform for network virtualization.In order to solve the virtualization of multi-tenant under SDN,this paper proposed a network virtualization scheme based on OpenFlow.It used an intermediate agent to achieve the virtualization of traffic space.The agent could convert and match physical MAC addresses with virtual MAC addresses,as well as physical flow entries with virtual flow entries.Among them,it used of prefix or wildcard to match the flow table entries according to the actual data packet lazy evaluation.In addition,to protect the isolation between different tenants on a physical OpenFlow network,it mapped the single virtual MAC-wildcard flow entry to multiple physical flow entries with an exact MAC address.The experimental results show that the scheme has successfully implemented the network virtualization,and the virtualization cost is small and feasible.

关 键 词：软件定义网络 虚拟化 OpenFlow 中间代理 流表项转换 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]