With the development of internet and the constant appearances of the high - bandwith networked application , the power of the migration from traditional ethernet lan to fastethernet lan or gigabitethernet lan becomes stronger and stronger . today , 10 / 100mbps fastethernet lan has become the mainstream . in the network environment with tens of nodes , the ethernet switch has been the absolute necessary network device 随着互联网的发展、高带宽占用率的应用系统不断出现,从传统以太网向快速以太网( 100mb s , ieee802 . 3u )和千兆以太网( 1000mb s , ieee802 . 3z和ieee802 . 3ab )的迁移动力就越来越强劲。
This paper introduces the the development of the switched ethernet lan , analyses the function structure of the ethernet switch and points out the plotting of the software domain and hardware domain in ethernet switch . this paper puts forward the the architecture of the layer 2 ethernet switch versatile software platform . following of the idea of layering in the network stack and adopting modular design method in the design of the versatile software platform provides it with the characteristics of good porting , good scalability , and good cutting . and because the design of the layer 2 switched protocol comforms to the specificaion of ieee 802 . 1 completely , the platform has the characteristic of versatility in the field of ethernet switch . at last , we implement a layer 2 managed switch in a specific switch hardware 本文介绍了交换式以太网的发展过程,认真分析了以太网交换机的功能结构,明确了交换机硬件域与软件域划分,在此基础上提出了二层以太网交换机通用软件平台的体系结构,并对其中关键技术进行了深入剖析与设计。该通用软件平台的设计遵循了网络协议栈分层设计的思想,采用模块化设计方法,使其具有可移植、可扩展、可裁剪的特点。同时,所设计的二层交换协议完全遵循ieee802 . 1标准,在以太网交换机领域具有通用性。
The paper is originated from the project " high - performance ethernet switch research and development " . it investigates a switched ethernet and gives a design and realization of mainboard of a ethernet switch . based on the thorough understanding of principle of ethernet switch , most effort is focused on new technologies emerged at present , such as vlan , multicasting , priority strategy and flow control 本文在讨论以太网交换原理的基础上,主要讨论了交换式以太网出现的新技术:虚拟局域网( vlan ) 、组播、优先级技术、以及半双工和全双工流量控制技术,并设计和实现了24口的10 / 100mbps自协商的交换网板。
Regarding the prevailing broadband access technology , research focus is put on the new development of ethernet technology and the analysis of the application hi the access networks . secondly , with elemental concepts of network management introduced , the network management model is studied . followed that , a design model of the management agent software for ethernet switch is developed with respect to the function requirement 论文首先介绍了接入网的概念,比较了目前流行的宽带接入技术,着重研究了以太网技术的新发展,分析了新的以太网技术在接入网中的应用;其次,介绍了网络管理的基本概念,研究了网络管理的模型;接着,在分析了以太网交换机的功能需求的基础上,建立了以太网交换机管理代理的设计模型,并依据模型设计了管理代理软件的总体结构。
Five types of hardware will appear to serve the gigabit migration : gigabit ethernet network interface cards ( nic ) , aggregating switches that connect 100m and 1g bit / sec ethernet segments , all - gigabit ethernet switches , all - gigabit ethernet repeaters and gigabit - enabled routers (市场)将出现五类硬件产品,为向千兆位过渡服务,它们是千兆位以太网卡( nic ) 、连接100兆和1千兆位/秒以太网段的混合交换机、全千兆位以太网交换机、全千兆位以太网中继器和千兆位使能的路由器。