Ultimate Forwarding Resilience in OpenFlow Networks
Ultimate Forwarding Resilience in OpenFlow Networks
复制标题
OpenFlow 网络中的终极转发弹性
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
Jianhui Wang
中科院分区：
文献类型：
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作者：
Christopher Hannon;Dong Jin;Chen Chen;Jianhui Wang
软件定义网络是一种快速扩展的网络范例，旨在将控制逻辑与转发设备分离。通过集中控制，网络运营商能够部署和管理更有效的转发策略。传统上，当网络因维护、故障或网络攻击而发生变化时，集中式控制器会处理这些事件并反应性地部署新的转发规则。这项工作提供了一种策略，不需要控制器来保持连接，同时只使用现有OpenFlow协议版本1.3或更高版本中的功能。在本文中，我们说明了为什么转发弹性是需要在OpenFlow网络，并提供了一个算法，计算所需的流条目，以实现最大的转发弹性在任何任意网络上的多个链路和控制器故障的存在。
Software defined networking is a rapidly expanding networking paradigm that aims to separate the control logic from the forwarding devices. Through centralized control, network operators are able to deploy and manage more efficient forwarding strategies. Traditionally, when the network undergoes a change through maintenance, failure, or cyber attack, the centralized controller processes these events and deploys new forwarding rules reactively. This work provides a strategy that does not require a controller in order to maintain connectivity while only using features within the existing OpenFlow protocol version 1.3 or greater. In this paper we illustrate why forwarding resiliency is desired in OpenFlow networks and provide an algorithm that computes the flow entries required to achieve maximal forwarding resiliency in presence of both multiple link and controller failures on any arbitrary network.