不同冗余度下的网络级联失效仿真分析

为分析不同冗余度接入方式对多自治域网络在级联失效时的性能造成的影响，基于互联网的现实情况和多自治系统关联的特点，分析了不同冗余度下的多自治域网络拓扑结构，建立了多自治域网络级联失效模型,设立了级联失效评价指标，并对不同冗余度下的多自治域网络级联失效过程进行模拟仿真，分析级联失效的制约因素。结果表明：冗余度大的多自治域网络在级联失效发生时网络性能较好；发包率的增加会增大级联失效的规模。

Simulation Analysis of the Cascading Failure on Multi-AS Network under Different Redundancy

To analyze the influence of different redundancy access methods on the performance of multi-autonomous networks when the cascading failure occurs, this paper analyzes the topological structure of the multiple autonomous system with different redundancy and establishes the cascading failure model of Multi-AS with different redundancy, according to the actual situation of the Internet and the characteristics of the multiple autonomous system associated with the Internet. Futhermore, the paper analyzes the cascade failure constraints. The results demonstrate that the network with higher redundancy has better network performance when the cascading failures occur. They also show that the increase of packet delivery fraction will enlarge the scale of the cascading failure.