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1.引言网络技术的迅猛发展,Internet的广泛渗透,作为网络的最终用户希望从ISP(Internet提供商)得到高质量的服务,所以Internet运行性能的研究变得更加重要、更具有挑战性,大型IP网络(特别是Internet主干网)的性能监控变成了一个非常值得研究和重视的问题。目前在国际上有很多组织致力于网络性能监控的项目,例如IETF(Internet Engineer Task Force)IPPM工作组,提出了对于网络性能进行评价的标准,定义大范围网络性能测试的模型,为正确进行网络性能的测量提供高效的测量工具和测量技术[RFC2330];CAIDA(Cooperative Association for In-ternet Data Analysis)是专门对Internet流量进行研究和分析的国际组织。CAIDA已经开发出了许多的工具,对于Internet网络流量进行采集、统计和分析,以期达到全球网络基础设施的合理利用,优化网络拓扑结构,提高网络的使用性能等目的;APAN(Asia-Pa-
1. INTRODUCTION With the rapid development of network technology and the extensive penetration of the Internet, as the end user of the network hopes to obtain high-quality services from ISPs (Internet Providers), the research on Internet operation performance becomes more and more important and more challenging. The large The performance monitoring of IP networks (especially the Internet backbone) has become a very worthwhile research topic. At present, there are many organizations in the world that are devoted to network performance monitoring projects. For example, IETF (Internet Engineer Task Force) IPPM Working Group has put forward standards for evaluating network performance, models for defining a wide range of network performance tests, Performance measurement provides efficient measurement tools and measurement techniques [RFC2330]; CAIDA is an international organization that specializes in Internet traffic research and analysis. CAIDA has developed a number of tools to collect, analyze and analyze Internet network traffic in order to achieve the rational utilization of global network infrastructure, optimize the network topology and improve the network performance. APAN (Asia-Pa-