A survey on software defined networking with multiple controllers
A survey on software defined networking with multiple controllers
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DOI：
10.1016/j.jnca.2017.11.015
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发表时间：
2018-02
期刊：
影响因子：
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通讯作者：
Yuan Zhang-;Lin Cui;Wei Wang;Yuxiang Zhang
中科院分区：
文献类型：
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作者：
Yuan Zhang-;Lin Cui;Wei Wang;Yuxiang Zhang
与传统网络相比，软件定义网络（SDN）将控制平面和数据平面解耦，提供了可编程的网络配置能力。尽管有这样的能力，对SDN的批评之一是SDN控制器是单点故障，因此控制器降低了整个网络的可用性。多控制器可以提高网络的可靠性，因为如果一个控制器故障，数据平面可以继续运行。此外，单一的SDN控制器在性能和可扩展性方面都有很多限制。因此，需要多个控制器，并且对于大规模网络至关重要。然而，多控制器的出现大大增加了网络的复杂性，给SDN的管理和调度带来了许多新的挑战。本文综述了SDN多控制器的最新研究进展。在概述了SDN和OpenFlow的基础上，讨论了多控制器的优点和挑战。随后，我们详细讨论了多控制器SDN的设计原则和体系结构。在此基础上，对多控制器布置与调度的研究现状进行了总结和分析。最后，对全文进行了总结，并对今后的研究方向提出了建议。
Compared with traditional network, Software Defined Networking (SDN) decouples control plane and data plane, providing programmability to configure the network. In spite of such capability, one of the criticisms of SDN is that the SDN controller is a single point of failure and hence the controller decreases overall network availability. Having multiple controllers improves reliability of the network because the data plane can continue to operate if one controller fails. Furthermore, a single controller of SDN has many limitations on both performance and scalability. Thus, multiple controllers are required and critical for large-scale networks. However, multiple controllers increase network complexity dramatically and impose many new challenges to the management and schedule of SDN. This paper surveys latest researches on multiple controllers of SDN. Benefits and challenges of multiple controllers are discussed after giving an overview of SDN and OpenFlow in the paper. Afterward, we dwell on the detailed design principles and architectures of SDN with multiple controllers. Following that, current research works on multiple controllers placement and scheduling are carefully summarized and analyzed. Finally, we conclude this survey paper with some future works and suggested open research directions.