基于业务流的局域网业务可靠性评估与分析

摘要

In order to solve the problem that dynamics and continuity of application are ignored in present application reliabil⁃ity research, the continuous multi⁃state model of node performance is put forward by application flow combining with time and rele⁃vance of application flow, and then the application reliability evaluation indicators that show the quality of accomplishment of appli⁃cation flow are established. The simulation and analysis on one local area network with three⁃tier architecture are experienced. The results of experiences show that increasing the capacity and throughput rate of network equipment on convergence layer have signifi⁃cant improvement on application reliability;however, that on access layer has little improvement on application reliability.%为解决业务可靠性研究中忽略业务的动态性和连续性问题，结合业务流在时间上的关联性，提出了节点性能的连续多态模型，建立了表征业务流完成性的可靠性评估指标。以三层网络架构的局域网络为实例，进行仿真实验与分析。结果表明，增大汇聚层网络设备的容量和吞吐率可以明显提高网络业务的可靠性，而增大接入层网络设备的容量和吞吐率对业务可靠性的提高无明显影响。