生成树协议在OPNET中的建模与仿真研究

本文以生成树技术为重点,结合网络仿真软件OPNETModeler,详细分析了在该软件环境下STP、RSTP的建模机制.以一个包含6个网桥的环状拓扑为例,构建了网络仿真模型.通过测试3个Ethernet_station接收数据的情况,详细分析比较了STP和RSTP在拓扑变化方式、收敛时间、资源占用量等方面的差异.通过对所设计的环状拓扑的模拟仿真,可以有效地测试出RSTP在拓扑变化方式和收敛时间上对STP所作的改进,并且还能有效地测试出RSTP对STP有着较好的兼容性.仿真实验所得的结果验证了2个协议的正确性和有效性.

Modeling and simulation of spanning tree protocol based on OPNET

This paper focus on spanning tree technology,using network simulation tool OPNET Modeler,to analyze the modeling mechanism for STP and RSTP.A loop topology includes six bridges is chosen as an instance,and the simulation network model is built up.The topology change mechanism,the convergence time,which is needed to converge to an active topology,and the resource occupancy are compared by testing the three Ethernet-stations' ethernet data reception.By testing the loop topology proposed in this paper,the results indicate the improvement on STP in the convergence time and topology change mechanism by RSTP,and the compatibility between RSTP and STP can also be guaranteed.The simulation results can demonstrate that the two protocols are correct and effective.