中型贸易公司的网络拓扑设计研究

中型贸易公司的网络拓扑设计研究(论文11700字)
摘要
在现代社会，信息化重要性日益凸显，逐渐渗入到各个领域之中，企业网络方面的发展已经十分普遍，一个发展好的企业的网络的优点很多，一方面可以通过提高网络系统，进一步提升自身的全面的综合竞争力，另一方面能够把企业自身的日常使用开支的开销降低很多。为了设计符合这个公司的网络必须先了解公司需求然后再对其分析，通过与公司管理层的交谈我了解了公司队网络的需求和未来的发展，通过与员工的交谈我了解对网络的使用率和需要支持的服务。本文的关于网络的设计在总体的结构的设计的方面是采用两极星型的拓扑结构的设计方案。一级，二级分别是垂直的干线与水平的配线的子系统两者共同组成。在核心层使用两台三层交换机通过光缆连接各楼层提供吉比特的数据传输并通过热待机路由协议HSRP提供核心层的冗余。在公司的地区分部方面本文设计使用VPN来连接他们。用IP电话代替集团电话，进一步提升网络的复用率，与VPN相配合很大程度降低了长途电话的费用。既便利了局域网的规范管理，又避免了相应的网络存在的安全性的问题。完成后使用OPNET这款专业的模拟软件对网络进行了分析，本文对其中的两个参数比较关注就是网络的延时和IP电话的延时，测出来的数值在误差范围内，峰值与估计值也相近。并且能满足日后的发展。
关键字：VPN，VLAN，HSRP，IP电话
 
Medium-sized Trading Company Network Topology Design
ABSTRACT
With the arrival of information age, enterprise's network has been already more and more general, a good enterprise network may enhance the enterprise the comprehensive competitive power and reduce enterprise the daily expenses. In order to design conforms to this company's network to have to understand the company demand first then to analyzes, I talk with the boss of the company, understood the company to the network demand and the future development, at the same time also converses with the staff understood and must support the service to the network utilization ratio, like this may propose my design proposal through the demand analysis. I design in the overall structure use two polar stars topology plan, the vertical skeleton line subsystem is the first level, the level skeleton line subsystem is the second level. I used two three layer switch in the core level to provide the G bit data transmission through an optical cable connection floor and through HSRP to provide the core level the redundancy. Because the company has the local branch so I use VPN to provide the connection between them. Substituted for the group telephone with the IP telephone to enhance network duplicate using rate, coordinated VPN will reduce the long-distance telephone call with expense branch greatly. Use VLAN to facilitate the local area network management and enhance the network security. After the design completed, I use the OPNET that is specialized simulation software to analyze the network, the two parameters of my attention is the network time delay and the IP telephone time delay. The measured value in may accept in scope, the network transmission data peak value also approach my anticipated estimate, and will be able to satisfy in the future development.
Key words: VPN, VLAN, HSRP, IP call
 

目  录
第一章    需求与设计------------------------------------------------------------------------------------1
1.1    用户需求--------------------------------------------------------------------------------------1
1.1.1 公司概况---------------------------------------------------------------------------------1
1.1.2 客户需求---------------------------------------------------------------------------------1
1.2    系统分析和规划-------------------------------------------------------------------------------2
1.2.1 系统流量分析------------------------------------------------------------------------2
1.2.2 系统规划----------------------------------------------3
第二章    网络构建-------------------------------------------------------------------------------------4
2.1 综合布线----------------------------------------------------------------------------------------4
2.1.1 网络拓扑结构设计---------------------------------------------------------------------4
2.1.2 垂直主干子系统布线------------------------------------------------------------------4
2.1.3 水平主干子系统布线------------------------------------------------------------------4
2.1.4 工作区子系统布线---------------------------------------------------------------------4
2.2 中心机房的规划-------------------------------------------------------------------------------5
2.2.1 机房工作区设置------------------------------------------------------------------------5
2.2.2 机房布线---------------------------------------------------------------------------------5
2.3 局域网构建与Internet连接------------------------------------------------------------------6
2.3.1 局域网主干系统设计和设备选择---------------------------------------------------6
2.3.2 IP电话系统------------------------------------------------------------------------------7
2.3.3 Internet连接配置----------------------------------------8
第三章    网络管理与安全---------------------------------------------------------------------------10
3.1网络地址转换-----------------------------------------------------------------------------------10
3.2安全访问规则-----------------------------------------------------------------------------------10
3.3内部网用户Internet访问配置---------------------------------------------------------------10
3.4网络防病毒管理--------------------------------------------------------------------------------10
第四章 性能分析---------------------------------------------------------------------------------------12
第五章 结论---------------------------------------------------------------------------------------------16
5.1 设计----------------------------------------------------------------------------------------------16
5.1.1 用VPN取代DDN、FR等专线设计-----------------------------------------------16
5.1.2 使用了IP电话--------------------------------------------------------------------------16
5.1.3 使用VLAN组建局域网--------------------------------------------------------------16
5.2 遇到的困难和解决方法----------------------------------------------------------------------17
参考文献-------------------------------------------------------------------------------------------------18
致谢-------------------------------------------------------------------------------------------------------19