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为了改进开放式最短路径优先(O SPF)协议实现的性能,该文深入分析了O SPF复杂的协议行为并建立了随机Petri网模型。同时提出了耗时过程的概念,并且从O SPF协议行为中提取出耗时过程,简化上述Petri网模型。最后利用工具SPNP进行了模拟分析。实验结果表明O SPF协议在不同的网络状况下具有不同的性能表现:当网络变化频繁时,O SPF协议的主要负载是路由计算;当网络变化平缓时,O SPF协议的主要负载是链路状态声明信息(LSA)检索。这样为提高O SPF协议的性能提供了定量分析方法。
In order to improve the performance of Open Shortest Path First (O SPF) protocol implementation, this paper deeply analyzes the O SPF complex protocol behavior and establishes a stochastic Petri net model. At the same time, the concept of time-consuming process is proposed, and the time-consuming process is extracted from O SPF protocol to simplify the Petri net model. Finally, using the tool SPNP simulation analysis. The experimental results show that O SPF protocol has different performance under different network conditions: when the network changes frequently, the main load of O SPF protocol is routing calculation; when the network changes gently, the main load of O SPF protocol is the link state Claims Information (LSA) Search. This provides a quantitative approach to improve the performance of the O SPF protocol.