【作者】 王晓欣；

【导师】 陈振翼； 阮康敏；

【作者基本信息】 天津工业大学 ， 控制理论与控制工程， 2002， 硕士

【摘要】 本文叙述了应用于小区宽带体系的VLAN交换机和网管交换机的软、硬件设计。 目前，我国的现代化小区建设日新月异，而小区宽带交换体系的完善程度是信息社会人们衡量其现代化水平的重要标准，宽带小区除了要有较高的出口带宽外，还要求有强大的内部交换能力。因为我国的宽带小区规模越来越大，小区内部信息交换也越来越多，如VOD点播、联网游戏等，如此大量数据交换工作都交给骨干网来完成，将远远超过目前我国骨干网的负载能力，而骨干网的升级代价又是如此之高，显然这种解决方法是不现实的。因此，急需一种新的解决方案。目前国内市场上的绝大多数交换设备都是OEM国外的网络产品，种类少、价格高，不适合国内的操作习惯，而且没有自主的知识产权。这些因素都极大的阻碍国内宽带小区建设。为了解决人们日益增长的信息交换需求与网络现状之间的矛盾，我们提出了一种全新的小区宽带交换体系解决方案。这套方案的硬件体系是建立在VLAN交换机和网管交换机基础之上的。VLAN交换机直接面向小区用户，位于整个宽带小区网络框架的最底层。它不同于传统的“傻”交换设备，而是应用了SST89C58大容量FLASH的MCU，硬件成本很低、操作简便，而且能进行在线VLAN划分和端口速率配置。网管交换机则是一种国内各大网络厂商正在大力开发的高档交换机，它位于小区网络框架的高层。它应用了当前国内外最先进的CPU处理芯片、最新的网络管理框架和自主开发的eCos操作系统，因此它是一种性价比极高的高档交换机。 把这两款交换机在小区宽带交换体系中进行有机的组合，是目前国内宽带小区中一种比较领先的综合解决方案。在2002年7月，该方案作为有创意的解决方案，被推荐到在北京召开的中国宽带网络建设交流会上参加大会交流，得到了国内各大网络厂商很好的评价。并且该小区宽带网络方案已被国家广电总局所采用，在江西南昌某小区正式投入使用，得到了业界广泛的好评。更多还原

【Abstract】 This article tells us the designation of VLAN and management switchers for modern district broadband transfer system.Our modem district is developing quickly, and the level of information is a main standard to evaluate the living environment. Broadband district needs high internal transfer ability besides high broadband export. Because the district is becoming larger and larger, more and more information is transferred inside one building or a district, such as VOD and Internet games. It is impossible to send all these information to the main net. On the one hand, lots of the information is internal, so it is best to transfer them in the local area net. On the other hand the cost of updating the main net will be so large and its updating time is so long that the main net can’t supply enough broad band and will come to paralyze. So we should divide the information into two parts, one for external and the other for internal. We should transfer different information by different manners, and we need special transfer devices for the modern district. There are few transfer devices designed by ourselves in our country, most of which are OEM products. There are few kinds of transfer devices and the price is so high. Above all, their operations are not suitable to us. So it is necessary to develop our own transfer device.This article introduces the request and the questions of the broadband district. It puts forward a new project to resolve these problems. Two kinds of switchers are designed for this project, one is VLAN switcher and the other is management switcher. VLAN switcher is at the bottom of the management frame. Because of the application of the SST89C58 MCU with large amount of FLASH, its cost is cut down and the operation is so simple that the switcher can be configured online. The management switcher is top grade device, which is located on the top of the frame. It adopts ARM? CPU, SNMP protocol and eCos operation system. It can be managed by PC through Internet.The two Ethernet switchers cooperate in the new project very well. This is an advanced transfer frame in our country, and it is suitable to the development of our broadband district. Now this project and the two switchers have been applied in several modern districts and received good comments.更多还原