东华理工大学-企业局域网规划和设计--学士学位论文.doc

毕业设计（论文） 题 目：企业局域网规划和设计 Title：Enterprise LAN planning and design 系 别： 软件学院 专 业： 网络工程 学 号：学生姓名： 张 伟 指导教师： 王 志 波 二零一二 年 三 月摘 要 网络技术高速发展的今天，企业网络的优劣已经成为衡量企业竞争力的标准之一。针对金融行业的特点，本文介绍了一个行业专用网络的整体设计方案。 本方案充分考虑到网络的负载均衡和稳定性能，所以采用三层网络结构。其中，核心层采用两台设备，配置Cisco HSRP协议进行双机热备份。汇聚层采用双链路与核心相连，提高链路的稳定性同时采用双链路捆绑提高网络链路带宽利用率，所有网关设在汇聚层避免广播到达核心，提高核心路由的利用率以达到数据高速转发的要求。路由协议则选择安全性高、收敛速度快的OSPF协议。服务器群组则重点介绍了DHCP、邮件服务器及FTP服务器等企业中较常用到的服务器的软件选择及搭建方法。对于网络中可能存在的安全威胁，针对不同的需求，方案中提出了VLAN技术、访问控制列表、防火墙技术等安全解决方案，以求构建一个安全、高效、可考性业务网络。 关键词：网络层次化； 热备份； 虚拟局域网； 控制列表； 防火墙ABSTRACT As the high-speed development of the network technique, the quality of enterprise network has already become one of the standards that measure the competition ability of the enterprise. Aiming at the characteristics of the certificate profession, this paper will introduce an overall design of professional network applying for enterprise. Seriously Considering the load balance and stability of the network, we adopt three layers structure in the design. Core Layer adopts two equipments to master slave scratching and duplicate copy with the protocol of Cisco HSRP. Convergence layer adopts double link and the core is connected, to improve link stability and dual link bundling improves the network link bandwidth utilization, all gateway in convergence layer avoid broadcasting arrived at the core, improve the utilization rate of core routing to achieve high speed data forwarding requirements.The routing protocol chooses the protocol of OSPF, which has high security and rapidly converging. The server applications set the point on introducing the method of creation and software selection for the common enterprise server applications, such as DHCP, the mail server and the FTP server etc. In order to set up a safety, fuel-efficient and reliable enterprise network, we put forward the VLAN technique, the fire wall technique for the different needs in resisting the safety threaten.