摘要:21世纪是一个以网络为平台的信息时代，企业信息化已经成为企业重要财富和宝贵资源。只有坚实的计算机网络基础设施才能承载信息化的飞速发展，进而推动企业变革、提升企业核心竞争力。构建一个安全可靠、高效实用、管理方便的大型企业网络已经企业信息化建设成功的关键基石。

　　本文对太仓港企业网进行了需求分析，根据分析结果对该企业网络进行了规划和设计，并对太仓企业网络设计中所采用的技术进行了说明，论文还对组网中所涉及的交换机和防火墙等设备进行了详细的配置，最后就如何保障企业网络高可用性做了介绍和部署。

　　经过规划、设计和配置的网络进行了试运行，运行时间达3600小时左右，未出现网络故障。运行结果表明：网络安全和管理策略有效。最后还对网络方案的扩展性进行了分析。

关键字：企业网; 网络设计与配置; 高可用性; 层次化网络结构

Abstract:The 21st century has now entered into information age which is on basis of a key platform---Internet. Informationization can be viewed as important assets and treasured resources of modern enterprises. Thus only solid network infrastructures can facilitate rapid growth of informationization and further promote reconstruction of enterprises. Moreover, core competitiveness can be improved. In a word, establishing a large-scale network which is safe, reliable, efficient, practical and convenient to control has been the priority of success for modern enterprises nowadays.  

　During the analysis of the needs of network forming at Taicang port, this thesis creates designs on the basis of the results and configures and gives illustations about the used technology. This thesis also involves detailed configurations of the swith and the fire wall appeared in the net forming. And elaborations and arrangements of how to protect the usability of network are also be shown.   During the past 3,600 hours, no mistakes have happened. Thus a conclusion can be drawn that the applied safety and arrangement strategies are useful and practical. Finally, a brief analysis of expansibility of the plan is expressed clearly.

Key words：enterprise network;  network design and configuration;  high availability;  hierarchical network structure