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Measuring robustness of SDN control layers

机译:衡量SDN控制层的健壮性

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摘要

The controller placement problem remains a key aspect of Software Defined Networking (SDN). The selection of a suboptimal controller may impact severely the performance of the control layer and, in consequence, cause a substantial degradation in the data layer. Different approaches for controller placement have been proposed with various objectives in mind, but most of them do not consider the characteristics of the resulting control layer in terms of robustness. In this paper we propose and formalize a complete metric for estimating robustness of a SDN control layer, and we evaluate two heuristics for controller selection and control layer construction: Fast Failover and a simplified version of k-Critical. The results of the performed evaluation indicate that the control layer topology induced by k-Critical is less prone to failures, more robust and more homogenous than those computed by Fast Failover.
机译:控制器放置问题仍然是软件定义网络(SDN)的关键方面。次优控制器的选择可能会严重影响控制层的性能,并且结果在于,在数据层中导致实质性降级。考虑到各种目标,已经提出了不同目标的控制器放置方法,但大多数人在鲁棒性方面都不考虑所得到的控制层的特征。在本文中,我们提出并正式化了一个完整的公制来估算SDN控制层的稳健性,我们评估了两个控制器选择和控制层构造的启发式信息:快速故障转移和简化版本的K-Critical版本。所执行的评估结果表明,K-Trical诱导的控制层拓扑不太容易发生故障,比通过快速故障转移计算的那些更稳健更均匀。

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