一种基于虚拟化平台的网络仿真准实验床  

A Para-testbed for Network Simulation Based on Virtualized Platform

作　　者：黄锦松[1] 杨艺[1] 王文鼐[1,2] 

机构地区：[1]宽带无线通信与传感网技术教育部重点实验室,江苏南京210003 [2]南京邮电大学通信与信息工程学院,江苏南京210003

出　　处：《计算机技术与发展》2015年第8期208-212,共5页Computer Technology and Development

基　　金：江苏省科技支撑计划(工业)项目(BE2013019)

摘　　要：由于为通信网络验证实验构建真实环境的代价过大,而传统的仿真软件又缺乏真实性,针对这种情况,文中结合虚拟化平台技术,设计了一种网络仿真准实验床系统。通过物理资源虚拟化,将多个全功能网络节点和模拟的通信链路实体部署在虚拟机层面。系统基于XEN准虚拟化环境,引入GNS3和Net Em软件包,分别构造真实路由器和调控通信链路,再由虚拟机模拟网络端节点。实测表明,单台物理服务器可部署6个全功能网络节点和5条通信链路,配置构成一个哑铃型网络的准实验床。分析了Reno和Vegas TCP控制算法的公平性实验结果,并与NS2软件仿真对比,证实所设计的准实验床具有高逼真度。Because of the high costs of building real network environment for network verification experiments while the traditional simulators are lack of fidelity,in view of this, present a system of para-testbed for network simulation by the techniques of virtualized plat- form. Aiming at fidelity and scalability of simulation, propose a deployment approach for multiple fully-functional network nodes and communication link emulators on virtual machine layer by physical resources virtualization. The para-testbed is based on XEN server en- vironment to install realistic routers by open source packages GNS3, to control communication links by NetEm, and to simulate network terminals by virtual machines. An experimental para-testbed consisting of 6 nodes and 5 links is to set up over single a machine to simu- late a dumbbell typed network. The results on the fairness experiment of the current Reno and Vegas TCP algorithm are reported and com- pared with that by NS2 evaluations. It is showed that the proposed para-testbed disposes of the fidelity in network simulation.

关 键 词：准实验床 虚拟化平台 GNS3 NETEM 逼真度 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]