REFINE:一种可重构的SDN转发平面实现模型  

REFINE: an Implementation Model of Reconfigurable Forwarding Planes for SDN

作　　者：赵涛[1] 李韬[1] 孙志刚[1] 卞洪飞[1] 黄金锋[1] 

机构地区：[1]国防科学技术大学计算机学院,长沙410073

出　　处：《小型微型计算机系统》2015年第10期2284-2288,共5页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(61202483)资助;国家"九七三"重点基础研究发展计划项目(2012CB315906)资助;国家"八六三"高技术研究发展计划项目基金项目(2011AA01A10)资助

摘　　要：SDN(Software-Defined Networking)转发平面抽象是有效提升网络控制能力的关键.由于Open Flow描述能力有限,难以有效应用于多种网络场景.因此,针对不同的网络应用场景,出现了多种SDN转发平面抽象,且具有其定制的转发平面实现模型.然而,异构的实现模型具有不同的架构和实现特点,为SDN网络研究带来极大挑战.提出一种可重构的SDN转发平面实现模型REFINE(Reconfigurable Forwarding Plane for SDN),通过提高灵活性从而支撑多样化SDN转发平面的实现.与传统的实现模型相比,它灵活性高、实现快速且成本低.通过分析目前SDN转发平面的处理流程将SDN转发平面实现模型分为八个功能模块,并根据这些模块的具体实现与转发平面抽象的相关性将REFINE模型分为抽象相关逻辑和抽象无关逻辑.通过重构抽象相关逻辑并使用统一接口可以灵活快速低成本地实现不同的SDN转发平面.原型系统表明REFINE可以灵活有效支持多种SDN转发平面抽象的实现.Forwarding plane abstract for SDN （ Software-Defined Networking） can efficiently enhance the ability of SDN. Due to the limited description ability of OpenFlow,OpenFlow cannot he applied to some network environments. Thus, SDN needs many kinds of forwarding abstracts to support more environments. Besides, each forwarding abstract has its own customized forwarding plane implementation model. However, different implementation models have different architectures and features, which makes network study face some challenges. Thus,we propose the REFINE （ reconfigurable forwarding plane for SDN ） implementation model, which enhances the flexibility of implementations to satisfy many abstracts. Compared with customized models, the model has three advantages ： high flexibility, fast implementation and low cost. Through analyzing the processing of forwarding plane, the model is divided into eight function modules. Besides ,the REFINE model is divided into abstract-dependent logic and abstract-independent logic according to the dependency between implementation and forwarding abstract. Reconfiguring modules of the abstract-dependent logic and using interfaces of abstract-independent logic can implement different forwarding planes. Prototype proves that the model can support many forwarding plane abstracts for SDN.

关 键 词：可重构 SDN转发平面抽象 REFINE 实现模型 

分 类 号：TP303[自动化与计算机技术—计算机系统结构]