摘要随着计算机网络的迅猛发展，曾经在园区网中被广泛使用的10M/100M以太网技术、ATM等技术已经渐渐不能适应业务需求。现在，千兆以至10G级别以太网技术正逐渐成为园区网主干的主流技术。因此，许多大型园区网络面临着技术改造或者重新设计。本文针对当前园区网络中存在的设计混乱、层次复杂、稳定性低，安全性不足等一系列问题，采用工程化设计方法，依照行业规范，设计并模拟实现一个园区网络，该网络依照行业规范设计，采用新近成熟的产品与技术，满足用户安全性、通用性、可操作性和拓展性的要求，由于网络设计过程中严格依照行业规范，采用模块化设计思想，因此网络系统各层可移植性强，极大的方便了以后的网络设计工作。关键词：交换机；路由器；规划；设计；系统集成IAbstractWiththerapiddevelopmentofcomputernetwork,thekindsofbusinessinenterpriseororganizationhaveincreased,andthedataflowofbusinesshasrisenalot,thetendenceofwhichisveryevident.Theoncewidelyusesdtechnologies10/100MEthernet,ATMetc.graduallyfailtomeetthedemandsofbusiness;atthemoment,theEthernetof1000Moreven10Gisbecomingthemaintechnologyinthemajorcampusnetwork.Inconsequence,manylargecampusnetworkarefacingtheproblemsoftechnologychangingornewdesigning.Aimingattheproblemsincampusnetandenterprisenetsuchasdisorderlydesign,complicatedlevels,lowstability,lackofsecurityandsoon,thisthesiswilladopttheengineeringdesignmethod,Accordingtotheprofessionalstandards,theauthorofthisthesisintendstodesignandimitatealargescaleofcampusnet.Byfollowingtheprofessionalstandardsandadoptingtheupdatedproductsaswellastechnology,thisnetcansatisfytheusersforitssecurity,versatility,manipulationandextension.Becauseofthestrictconformitytoprofessionalstandardsinthedesigningofthenetandtheemploymentofmoduledesigntechnology,everylevelinthisnetsystemcanbeimplanted,whichwillgreatlybenefitthenetdesigningworkinthefuture.keywords:switch;router;plan;design;Systemintegration目录摘要......................................................................I英文摘要...................................................................II第一章绪论.................................................................11.1选题来源.............................................................11.2主要内容.............................................................11.3论文结构.............................................................1第二章园区网概述...........................................................32.1园区网含义...........................................................32.2园区网特点...........................................................32.3园区网发展趋势.......................................................3第三章园区网设计...........................................................43.1需求分析.............................................................43.2网络设计原则.........................................................43.3网络模型设计.........................................................53.3.1核心层（CoreLayer）............................................63.3.2汇聚层（DistributionLayer）......................................63.3.3接入层（AccessLayer）..........................................63.4网络模型选择.........................................................63.5园区网络拓扑图.......................................................73.6IP地址规划...........................................................73.7VLAN规划...........................................................83.8路由协议选择........
