软件定义网络客户信息链路故障恢复仿真

摘要

对客户信息链路故障恢复,能够有效提高软件定义网络的运行质量.对软件定义网络客户信息链路故障的恢复,需要对数据流量转发状态进行划分,定义客户信息链路故障判断阈值,完成信息链路故障恢复.传统方法先通过链路发现协议来获得全网拓扑,监控网络链路状态,但忽略了定义客户信息链路故障判断阈值,导致故障恢复效果不理想.提出基于改进着色树扩展的客户信息链路故障恢复方法.对数据流量转发状态进行划分,将查询数据包头识别位和入口链路所在的着色树颜色标识信息定义为客户信息链路故障判断阈值,给出客户信息链路故障恢复最优策略,由此进行软件定义网络的客户信息链路故障恢复.实验结果证明,所提方法故障恢复精度高,大幅度地提高了网络故障恢复能力.%For the fault recovery of customer information link of software-defined network,it is necessary to divide the traffic forwarding state of data and define the judgment threshold of customer information link fault.The tradi-tional method ignores the definition of fault judgment threshold of customer information link,so that the failure recovery effect is not satisfactory.A method of fault recovery for customer information link based on improved colored tree expansion is proposed.Firstly,the traffic forwarding state of data is divided.Secondly,the identification information of colored tree is defined as the fault judgment threshold of customer information link.Then,the optimal strategy for link failure recovery of customer information is given.Thus,the failure of customer information link is recovered from software-defined network.Simulation results prove that the proposed method has high accuracy for fault recovery,which greatly improves the recovery capability of network failure.