毕业设计 中型企业网络设计及仿真模拟

摘要

一个高效的企业办公环境对企业来说是效率和利益的保证，图形操作系统的出现催生了办公自动化的发展，办公自动化确实给企业的办公带来了很大的帮助。办公局域网的出现又一次彻底的颠覆了企业的办公理念，网络能使企业内部之间实现高速的通信和全方位的信息共享，给企业的办公带来了极大地便利。正是由于局域网的巨大优势，各公司企业和政府部门都纷纷建设和加强高速局域网络，利用现代化的信息技术使公司在残酷的市场竞争中立于不败之地。

本设计中的公司是一家处于快速成长且资金雄厚的高科技技术研发和生产的中型企业，在公司网络的设计中公司决定全部使用国际知名的思科公司的产品。在参考大量以往成功的实例后决定网络拓扑采用三层设计结构，分别是：核心层、汇聚层和接入层，这样可以有效地分割整个企业网络的流量，保持网络的长久稳定，也便于未来的网络扩展。然后根据思科官方提供的资料选择各个层中的设备及模块并做相应的配置。最后在工程实施之前在思科提供的模拟软件上模拟设计好的企业网络，以验证网络的合理性和稳定性。其次规划好在网络中启用的高级服务应用，做好相应的配置，并在VM虚拟机上进行模拟配置以便及时发现问题并解决。

关键词：中型企业网络设计交换机服务器虚拟机

Abstract

An efficient business enterprise office environment is the interests of efficiency and guarantee. The appearance of Graphical Operating System spawned the development of Office Automation. Office Automation to the company's office did bring a lot of help. The appearance of Office LAN overthrow the corporate office concept. The network make the high-speed and full range of information sharing of internal communication possible, and brings to the enterprise greatly facilitated. Because of the great advantages of local area network, the companys and government departments have to build and strengthen Enterprise LAN, using modern information technology make companies stand stadily in a brutal market competition.

The company of this design is a rapidly growing and financially strong high-tech R & D and manufacturing of medium-sized enterprises. In the company's decision the network all use the world-renowned Cisco‘s products. In reference to a large number of successful examples of the past decided network,the topology design using three-tier structure, namely: the core layer, collect layer and access layer. This can not divide the entire enterprise network traffic effectively and maintain long-term stability of the network, but also to facilitate the network expansion in the future. Then according to the official information provided by Cisco. We Select the equipment and the module configuration accordingly for each layer. Finally, before the implementation of the project we better simulate in Cisco's corporate network simulation software to verify the rationality and stability of the network design. Secondly, make a plan for advanced services and applications.Then appropriate configure server in VMware Workstaion in order to discover and solve problems.

Key words: Medium-sized Enterprise Network Design Switch Servers VMware Packet Tracer

目录

第1章绪论 (1)

第2章需求分析 (6)

2.1 硬件需求 (6)

2.2 软件（服务）需求 (6)

第3章硬件设计 (7)

3.1 系统总体设计 (7)

3.2 交换模块设计 (9)

3.2.1 核心层设计 (9)

3.2.1.1 设备的选择 (9)

3.2.1.2 核心层交换机的配置 (10)

3.2.2 汇聚层设计 (20)

3.2.2.1 设备的选择 (20)

3.2.2.2 汇聚层交换机配置 (20)

3.2.3 接入层设计 (22)

3.2.3.1 设备的选择 (22)

3.2.3.2 接入层交换机配置 (23)

3.3 防火墙模块设计 (28)

3.3.1 设备选择 (28)

3.3.1.1 Cisco PIX 525概述 (28)

3.3.1.2 Cisco PIX 525产品特性 (28)

3.3.2 防火墙配置 (30)

3.3.2.1 防火墙的基本配置 (30)

3.3.2.2 配置fixup协议 (31)

3.3.2.3 设置最大传输单元（MTU） (32)

3.3.2.4 设置PIX入侵检测 (32)

3.4 服务器模块设计 (32)

3.4.1 服务器的性能指标和参数 (32)

3.4.2 服务器的可用性 (33)

第4章软件设计 (34)

4.1 域名服务 (34)

4.1.1 DNS服务 (34)