【作者】 闵笛；

【导师】 吕锋；

【作者基本信息】 武汉理工大学 ， 通信与信息系统， 2006， 硕士

【摘要】 EPON(Ethernet over Passive Optical Network,以太无源光网络)是一种新型的光纤接入网技术,它采用点到多点结构、无源光网络传输,在以太网之上提供多种业务。它综合了PON技术和以太网技术二者的优点,具有高带宽、低成本、易使用、易升级的优良特性。因此成为光接入网的最佳选择方案。 为了保证EPON系统能稳定高效的运行,并协调保持系统的正常工作使得EPON资源得以最大限度利用,一个高效的网络管理系统必不可少。本文研究的基于SNMP的EPON网管代理能识别管理站对被管设备发出的查询请求,还可以在自身发生故障的时候主动向管理站发送错误报告,它是EPON网络系统中的一个重要的组成部分,对整个EPON系统的正常运行及网络资源的有效利用具有重要的意义。 本文主要研究EPON网管系统中代理软件的设计和实现,主要内容如下: (1)介绍了EPON系统组成结构及技术特点,比较了其他几种接入网技术得出了EPON的技术优势,根据EPON的结构特点,结合本课题涉及的系统提出了基于SNMP的EPON的网络系统结构原型。 (2)系统的阐述了简单网络管理协议的原理,深入研究基于SNMP开发的网络管理系统的体系结构,包括SNMP协议支持的操作以及管理信息结构和管理信息库等。 (3)分析了EPON系统基于入Linux操作系统开发的原因,提出EPON系统中OLT/ONU的软件体系结构,并分析该架构设计的优点。最后给出了EPON系统中必须实现的MIB以及实现该MIB的机制。 (4)详细阐述了EPON网管系统中代理的具体实现方式,分别给出了几个重要模块的实现机制,包括SNMP管理代理的实现、MIB模块的设计与实现、如何实现系统配置信息的存储与恢复和系统告警信息的上报机制。 (5)根据SNMP Agent设计与实现要达到的功能目标,对系统进行测试,给出结果,并进行相关分析。更多还原

【Abstract】 EPON (Ethernet over Passive Optical Network) is one of the new solution for optical fiber access network. It takes a Point-to-Multipoint Architecture and provides Multi-Service basing on Ethernet. It combines the advantage of PON technology and Ethernet technology, has the feature of high bandwidth, low cost and being used and updated easily .So, it becomes the best solution for access network.It is too important to provide an effective network management system for EPON to assure more stable, effective and orderly servicing. The SNMP agent for EPON network management can identify the request from Manager and send error information to manager when there is a jam occurred. It is one important component and mainly in charge of managing and improving EPON performance which is very significant in EPON system.This article focuses on the design and implementation of Agent software of EPON network management system, and the main contents are as follows:(1)Introduce the structure and characters of EPON system, get the advantage of EPON after compared with other access network .At last, according to the characters of EPON, one network management solution basing on SNMP is given.(2)Depict the theory of simple network management protocol, deeply research the network system structure basing on SNMP ,including operations、 structure of management information and management information database.(3)Explain the reason why EPON system development should be based on linux embedded system, present the software structure of OLT/ONU in EPON system, then analyze the advantage of the design .Put out the necessary MIB in system and the realization mechanisms at last.(4)Do detailed illuminate the realization of Agent in EPON network management system, the realization mechanisms of some important modules are given such as the realization of Agent in SNMP management、 the design and realization of MIB module、 how to implement the save and recovery of system configuration information and mechanism of trap report.(5)Test system according to the function target of SNMP Agent, put out the result,then analyze it.更多还原