VNF‐Consensus: A virtual network function for maintaining a consistent distributed software‐defined network control plane,International Journal of Network Management

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VNF‐Consensus: A virtual network function for maintaining a consistent distributed software‐defined network control plane
International Journal of Network Management ( IF 1.5 ) Pub Date : 2020-06-22 , DOI: 10.1002/nem.2124
Giovanni Venâncio ₁ , Rogério C. Turchetti ₂ , Edson T. Camargo ₃ , Elias P. Duarte ₁

Affiliation

Software‐defined networks (SDN) usually rely on a centralized controller, which has limited availability and scalability by definition. Although a solution is to employ a distributed control plane, the main issue with this approach is how to maintain the consistency among multiple controllers. Consistency should be achieved with as low impact on network performance as possible and should be transparent for controllers, without requiring any change of the SDN protocols. In this work, we propose VNF‐Consensus, a virtual network function that implements Paxos to ensure strong consistency among controllers of a distributed control plane. In our solution, controllers can perform their control plane activities without having to execute the expensive tasks required to keep consistency. Experimental results are presented showing the cost and benefits of the proposed solution, in particular in terms of low controller overhead.

中文翻译：

VNF-共识：一种虚拟网络功能，用于维护一致的分布式软件定义的网络控制平面

软件定义的网络（SDN）通常依赖于中央控制器，根据定义，该控制器的可用性和可扩展性有限。尽管解决方案是采用分布式控制平面，但是此方法的主要问题是如何保持多个控制器之间的一致性。应当在不对SDN协议进行任何更改的情况下实现一致性，并且对网络性能的影响尽可能小，并且对控制器应该透明。在这项工作中，我们提出了VNF-Consensus，这是一个实现Paxos的虚拟网络功能，以确保分布式控制平面的控制器之间的强一致性。在我们的解决方案中，控制器可以执行其控制平面活动，而不必执行保持一致性所需的昂贵任务。

更新日期：2020-06-22

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