基于SDN的服务链的研究与实现

发布时间：2018-11-19 19:13

【摘要】：SDN是一种新兴网络体系结构,亦是一种新的网络编程方法。SDN架构的技术亮点是控制平面和数据平面的分离,在控制平面通过软件集中管理和部署底层的转发设备,重点强调了软件在网络中的重要性。服务链是一种转发技术,目标是引导网络业务报文按次序通过服务节点。服务节点是网络中处理特定服务的设备,根据服务列表中配置的服务类型对报文进行处理,可以是物理设备,也可以是虚拟设备。在理论上,服务链支持任意数量的服务节点和网络服务,但需根据具体场景的需求选择。在本论文中,基于H3C平台的工程实践的服务链是单服务节点单服务的,而基于OpenDaylight平台的调度策略研究的服务链是多服务节点多服务的。基于H3C公司平台,其中Service Chain(SC)模块的本质就是组合服务链系统中具备各种功能的模块,使得模块之间有序安全高效的协作,以实现服务链在该场景中的功能。作者主要工作是完成SC模块的需求分析、编码实现以及组网验证其可行性。基于OpenDaylight平台,作者分析现有的服务链系统的服务功能调度策略,提出两种调度策略:基于Shuffle调度策略和基于优先级调度策略。前者在实现随机调度的前提下,最大化服务功能的利用率;而后者满足同一类型服务功能内容呈递减或递增的需求,并且可随时设置服务功能的优先级,以避免个别服务功能持续闲置,并设计了相关的调度方案验证其可行性。
[Abstract]:SDN is a new network architecture and a new network programming method. The technical highlight of SDN architecture is the separation of control plane and data plane. The importance of software in network is emphasized. Service chain is a kind of forwarding technology, whose goal is to guide network service packets through service nodes in order. The service node is the device that processes the specific service in the network. It can be physical device or virtual device according to the service type configured in the service list. In theory, the service chain supports any number of service nodes and network services, but needs to be selected according to the requirements of specific scenarios. In this paper, the service chain of engineering practice based on H3C platform is single service node, while the service chain based on OpenDaylight platform scheduling strategy research is multi-service node and multi-service chain. Based on H3C platform, the essence of Service Chain (SC) module is to combine the modules of service chain system with various functions, which makes the cooperation between modules orderly, safe and efficient, in order to realize the function of service chain in this scenario. The main work of the author is to complete the requirement analysis of SC module, coding implementation and networking to verify its feasibility. Based on the OpenDaylight platform, the author analyzes the service function scheduling strategy of the existing service chain system, and proposes two scheduling strategies: based on Shuffle scheduling policy and based on priority scheduling policy. Under the premise of realizing random scheduling, the former maximizes the utilization ratio of service function. The latter can meet the demand of decreasing or increasing the content of the same type of service function, and can set the priority of the service function at any time to avoid the individual service function remaining idle, and design the related scheduling scheme to verify its feasibility.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP393.0

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