一种SDN网络路径异常监控方法

Method of Software Defined Network Path Abnormity Monitoring

在SDN网络中,及时掌握网络中数据传输路径的运行状态对于控制器进行网络安全监控和流量的负载均衡至关重要。利用SDN网络架构的特点,提出了一种主动测量与被动测量相结合的路径异常监控方法,以对网络路径的运行状态进行异常监控。从路径的延迟和可用带宽两个方面分析网络路径的运行情况,并对出现异常的路径进行检测和报警,保障网络的正常运行。实验结果表明,在不同的网络条件下,所提方法都能有效测量网络路径的延迟和可用带宽,并且能够及时发现网络中出现的路径异常情况。

In the SDN architecture,the controller has to master the operating state of network data transmission path segment,which is quite significant for controller to implement the network security monitoring and traffic load balancing.Based on the characteristics of SDN architecture,the paper proposed an approach which combines reactive measurement and passive measurement for monitoring the network path segment abnormity.The method analyzes the operating state of network traversing path from two aspects of path’s latency and available bandwidth,which can also perform the detection and give an alarm for the abnormal network path segments.Our experiments show that the method can not only measure the latency and available bandwidth of path segment,but also can detect the abnormal path segment out timely and send out alarm signals.In network conditions of constant and variable network cross traffic,the approach can monitor the abnormal path segment and measure the path’s performance parameters efficiently.