基于负载通告的SDN多控制器负载均衡机制

发布时间：2018-03-27 06:07

本文选题：软件定义网络　切入点：控制器负载均衡　出处：《电子与信息学报》2017年11期

【摘要】：多控制器负载均衡是SDN网络部署研究中关注的问题之一。该文针对多控制器间负载均衡的时间效率问题,提出一种基于负载通告策略的负载均衡机制(LILB)。该机制包括负载测量、负载通告、均衡决策和交换机迁移4个核心功能组件。借助于负载通告的能力,每个控制器可以在过载后无需收集其他控制器的负载信息而尽快完成均衡决策。为了减少负载通告带来的通信负荷和处理负荷,该文提出一个抑制算法来降低负载通告的频率。此外,该文还提出了最重过载控制器、迁移交换机和目标控制器的决策方法,以及目标控制器接受迁移请求的判定策略来避免控制器的负载震荡;并为支持交换机迁移过程中控制器角色的平滑切换设计了一种交换机迁移的消息交互机制。最后,在基于Floodlight和Mininet的实验环境中验证了所提出方法的有效性。
[Abstract]:Multicontroller load balancing is one of the most important issues in the research of SDN network deployment. In this paper, a load balancing mechanism based on load notification strategy is proposed to solve the problem of time efficiency of load balancing between multiple controllers. This mechanism includes load measurement. Load announcement, balancing decision, and switch migration are four core functional components. Each controller can complete the balancing decision as soon as possible after overload without collecting load information from other controllers. In this paper, a suppression algorithm is proposed to reduce the frequency of load notification. In addition, the decision methods of heavy overload controller, transfer switch and target controller are also proposed. And the decision strategy that the target controller accepts the request of migration to avoid the load oscillation of the controller. In order to support the smooth switching of the controller role in the switch migration process, a message exchange mechanism of switch migration is designed. Finally, The effectiveness of the proposed method is verified in the experimental environment based on Floodlight and Mininet.
【作者单位】：北京邮电大学网络与交换技术国家重点实验室;
【基金】：国家自然科学基金(61501044) 国家863计划项目(2013AA013502)~~
【分类号】：TP393.0

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