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Internet由多个自治系统相互连接而成,AS间的互联结构体现了Internet的宏观结构。研究AS间的连接关系可以辅助分析网络特性。该文研究了Internet AS级拓扑发现,实现了一个Internet AS级拓扑发现系统。该系统分析BGP路由表得到Internet AS级拓扑并直观显示出来。分析了AS级拓扑的度分布属性,分析结果显示生成的拓扑具有幂律分布特性。
Internet by a number of autonomous systems connected to each other, the inter-AS Internet structure reflects the macro structure. Studying the connection between ASs can help analyze network characteristics. This paper studies Internet AS level topology discovery and implements an Internet AS level topology discovery system. The system analyzes the BGP routing table to get the Internet AS level topology and displays it visually. The degree distribution of AS-level topology is analyzed. The analysis results show that the generated topology has power-law distribution.