面向以太网的网络故障自动实时发现与定位方法

摘要

在网络应用已完全融入日常生产生活的今天，人们需要稳定、可靠的计算机网络，高效、准确地发现和定位网络故障，是提高网络可靠性的重要手段。现有的网络故障自动发现方法往往需要修改节点代码、控制节点行为来实现故障检测，而交换机等以太网设备通常并不具有可修改性。针对以太网故障的自动发现与定位问题，基于目前标准化交换机支持的简单网络管理协议SNMP（Simple Network Management Protocol）协议和管理信息库 MIB-2（Management Information Base）提出了“设备状态一致性检测算法”、“设备拥塞异常检测算法”等针对不同故障的检测算法。实验结果表明该故障检测算法对发现和定位以太网故障具有较高的效率和准确率。基于所提出的故障检测算法，该设计实现了一个故障发现与定位系统，并成功地在芜湖市国家电网计算机网络中部署运用。%Nowadays the network applications have been fully integrated into people’s daily life,the people require a stable and reliable computer network.To efficiently and accurately identify and locate network faults is the important means for improving networks reliability. However existing automatic network faults detection methods usually need to modify nodes code or control nodes behaviour to realise the faults detection,but the switches and other Ethernet devices are not modifiable typically.In this paper,in light of automatic Ethernet faults detection and localisation issue,we proposed based on SNMP and MIB-2 which supporting the standardised switches the “device status consistency de-tection algorithm”,“device congestion anomaly detection algorithm”and other detection algorithms aimed at different Ethernet faults.Experi-mental results indicate that these algorithms could identify and locate Ethernet faults with high efficiency and accuracy.Based on these pro-posed algorithms we design and implement a detection and localisation system for Ethernet faults,and it is successfully deployed in computer networks of State Grid in Wuhu Power Supply Company.