【作者】 朱晓峰；

【导师】 亓峰；

【作者基本信息】 北京邮电大学 ， 计算机科学与技术， 2007， 硕士

【摘要】 当今，OSPF作为应用最广的IGP被大量部署在运营商城域网和企业内部局域网上，但现有的技术手段却很难对其进行有效监测，这给网络维护和新业务推广带来了很大的障碍。如何对OSPF网络进行行之有效地监测和管理成为网络界关注的重要问题之一。本文综合分析了传统技术在OSPF网络监测中的应用方法及这些技术存在的问题，并结合网络监测的实际需求，提出了一种被动监听LSAs的OSPF网络监测技术。该技术以被动监听的方式捕获被监测网络上的包含OSPF协议分组的数据包，然后拆包解析LSAs，生成特定的监测消息，最终达到对网络进行实时监测的目的。该技术在很大程度上克服了传统技术在网络监测方面存在的网络负荷大、准确性低、可靠性差等缺点，满足了人们对OSPF网络进行有效监测的需求。本文根据被动监听LSAs技术提出了一个OSPF网络监测原型系统。该系统由路由器模块、数据包捕获模块、应用逻辑模块和呈现逻辑模块组成，主要实现了对OSPF网络的实时监测和离线查询统计。本文详细介绍了系统中各模块的设计和相关实现。当然，作为一种新技术的原型系统，该系统还有许多不足之处。本文最后总结分析了该系统存在的不足和局限性，并提出了系统将来的研究方向。更多还原

【Abstract】 Today, OSPF, as the most widely used IGP, is deployed in operator’s MAN and large-enterprise’s LAN. However, the technologies in existence are difficult to carry out effective monitoring. This brings a significant barrier for network maintenance and new businesses promotion. How to monitor and manage OSPF network effectively has become one of the major concerns.After analyzing the characters and problems of the traditional OSPF monitoring technologies, combined with the actual needs of network monitoring, this paper proposes an OSPF monitoring method based on the LSAs passive listening. This technology captures the OSPF protocol packets in the way of passive listening, then unpacks and parses LSAs to generate specific monitoring information and ultimately achieve the purpose of the real-time monitoring. It largely overcomes the traditional technologies’ disadvantages at overheads, correctness and reliability, and also meets the demand for effective OSPF monitoring.According to the LSAs passive listening technology, this paper presents an OSPF monitoring prototype system.The system consists of router module, packet capture module, application logic module and presentation logic module, it mainly achieves real-time monitoring and off-line query statistics. This paper introduces the design and related realization of each module in detail.As a prototype, the system still has many deficiencies. Finally, this paper analyzes the shortcomings and limitations of the system, and proposes the future research directions.更多还原