基于NPU架构的旁路式双10G POS分流接入平台设计

【作者】 严明；

【导师】 支晓繁； 于建华；

【作者基本信息】 复旦大学 ， 软件工程， 2008， 硕士

【摘要】 随着网络的迅猛发展,网络给社会群体带来信息便利促进经济发展的同时,也给网络运营商和监管层带来了更多的挑战,从前只管网络不管传输内容的运营模式已在淘汰,网络管理者需要在不影响原有网络结构的情况下,对网络数据进行有效的分析,现有旁路式分析系统前端一般采用路由器或专用芯片构成的系统实现网络线路接入和数据获取分发,随着骨干线路升级到10G POS(Packet OverSDH,SDH即Synchronous Digital Hierarchy),传统旁路式接入方案在保证性能前提下面临成本、系统灵活度(指能快速调整满足不同后端业务系统需求,包括实现七层过滤等)及可升级性(如满足未来网络协议等),这三者不能有效兼顾的问题。本文针对这些问题,通过分析相关网络处理器(NPU,Network ProcessingUnit)的特点,并结合旁路式接入系统要求和相关保持连接负载均衡算法,提出了以NPU作为处理核心的解决方案,即旁路式双10G POS分流接入平台,并以此为基础,具体描述了平台的硬件架构,平台数据平面与控制平面的系统功能和实现及对平台原型机部分指标的评测,最后通过相关案例展示了平台应用场景。通过NPU在旁路式分流接入平台的应用,提升了平台灵活性,增强了七层过滤功能,有效降低了系统整体成本,便于结合各种不同应用的旁路式分析系统形成相关解决方案,实现了社会效益和经济效益的双丰收,同时也为今后其它类似平台的设计开发提供参考。更多还原

【Abstract】 Huge development of the networking conveniences the public to gain information and promotes the economy. At the same time it brings the Internet Service Providers (ISP) and Internet Service Supervisors (ISS) with more challenges. The old-time pattern of management which ignored the transmitted content has been eliminated. A network manager ought to analyze the networking effectively without influencing the existed network construct. The existing front-end of traditional bypass-analyzing system generally makes use of the system comprising routers or specialized chips to carry out the network-line access and obtainment and distribution of data. As the bone-network upgraded to 10Gbps POS (Packet over Synchronous Digital Hierarchy), the access-project of traditional bypass-analyze confronts the issues from three aspects in order to hold performance: cost, system flexibility (refers to rapidly adjust the different back-end service requirement, including 7-layer filtration etc.) and upgradeable services (for example, satisfy the needs of network protocol in future such as IPv6.).Aiming at the problems above, the essay put forward the project through analyzing the features of Network Processing Unit (NPU), integrating with requirement of the bypass-access system and concerned keep-session arithmetic of payload balance. The solution, namely Bypass Dual 10G POS Distributary’s Access Platform, takes the NPU as processing core, gives a specific description of hardware construct; system function and implementation of the date transmitting plane and control managing plane; tests of part guide line of antitype-machine of the platform. At last, the solution presents the application scenes by giving some concerned cases.Via the application by NPU in the bypass-access platforms, the solution advances flexibility of the platform, boosts up the 7-layer filtration function and reduces holistic cost effectively. It helps to form the correlated solution by combining with different kinds of bypass-analyzing systems which have different application. The solution could achieve success both in social benefit and economical benefit. Also, it provides reference design for other similar platforms.更多还原