基于隧道模式的动态多出口多业务网络接入的研究与实现

【作者】 王思敏；

【导师】 葛玮；

【作者基本信息】 西北大学 ， 计算机系统结构， 2008， 硕士

【摘要】 随着高校扩招和教育信息化的开展,我国加强了高校校园网的建设。校园网从原先单一的教育网(CERNET)出口,发展到现在的多出口网络(CERNET和本地ISP两出口并存)。如今,网络服务日益增多,部分用户对网络服务质量提出了更高的要求。传统的多出口单业务网络已经不能满足高端用户的需求。基于隧道技术的动态多出口多业务网络接入方案是为了让多个运营商同时提供宽带接入服务而提出的。多出口多业务的核心技术问题是实现面向用户面向业务的动态路由能力。这种需求是传统路由器的面向IP的路由模式所不能满足的。本方案基于隧道,客户端策略路由,网关调度三种技术有机结合,低成本的实现了多出口多业务网络解决方案。其的特点在于:1.采用客户端策略路由,可以提供灵活的路由选择能力;2.通过隧道,将客户端策略路由和传统IP路由结合起来完成面向业务的路由;3.中心网关动态调度创建隧道,实现业务选择和管理;4.多接入模式并存,原有接入方式和隧道接入方式并存且互不影响,用户根据需要灵活选择;5.采用三层隧道技术,不受具体的网络接入设备影响,适应复杂的网络结构;6.网络建设简单,无需改变原有网络结构,成本低;7.支持各运营商独立计费,多种网络运营方式并存;8.支持负载平衡,当用户数量增加时,只需增加接入网关就能完成扩容。目前此方案已经在某高校试点运行,结果证明方案的易用型、灵活性和可扩展性,可以方便在已有的校园网中实现多业务。事实证明,将隧道技术、客户端策略路由以及中心网关调度三者结合起来,低成本的解决了校园网多出口、多业务需求的技术问题。本方案不仅可用于校园网,也可用于企业或者小区的改造。更多还原

【Abstract】 With the development of College Expansion and education informationize, our country reinforces the construction of campus network. Campus Network develops from single CERNET exports to multi-network (CERNET exists with local ISP). Today, the numbers of network services increases rapidly, thus, users need higher quality in network services. The traditional network which is multi-exports but single service has been unable to meet the demand of the users who need better service of network.The dynamic multi-exports and multi-services network solution based on Tunnel pattern is designed to allow more ISP provide services in one campus network. The key technology of multi-exports and multi-services is implementing dynamic routing technology which is user-oriented and service-oriented. This solution integrates three technologies, which are Tunnel, strategy routing by the client and gateway scheduling, and could achieve the multi-exports and multi-services network with lower cost. This solution has many advantages as follows:1. It can provide flexible routing capabilities by strategy routing on the client;2. Integrated client strategy routing with traditional IP routing by Tunnel to implement business-oriented routing;3. Centre gateway create tunnel dynamic and implement the selection and management of different business;4. Multi-experts exist and worded independently, User can chose expert flexibly;5. Don’t affected by network equipment and adapt to complex network structure by use the layer three Tunnel technology; 6. Easy to rebuild network, It needn’t to changing the original network structure and have a low cost;7. Support billing by different ISP and multiple network operators;8. Support load balancing, when the number of users increases, we can only increase the gateway to expand the network.At present, this solution has been running in several colleges, It is proved to be simple, flexible and easy to expanded. It can build multi-services campus network conveniently. It is proved that the technology that integrating the Tunnel technology, strategy routing by the client and center gateway scheduling could meet the requirements of campus for multi-exports and multi-services in a lower cost. This solution not only can be used in the campus network, but also can be used in enterprises or district.更多还原