The advent of the Software Defined Networking (SDN) paradigm represents a great opportunity for the definition of new network management solutions. In this work, we focus on the definition and implementation of a novel technique to solve the Traffic Matrix Assessment (TMA) problem from the perspective of an Internet Service Provider. Since the migration from legacy IP networks to fully-deployed SDN ones needs to be incremental due to budget and technical constraints, this paper proposes a mixed measurement and estimation scalable solution for hybrid IP/SDN networks to accurately solve the TMA problem by exploiting the availability of flow rule counters in SDN switches. The performance evaluation shows that our error-tolerant solution is able to assess the TM with a negligible estimation error by only measuring a small percentage of traffic flows, overcoming other state-of-the-art algorithms proposed in the literature. Moreover, the performance analysis of the proposed implementation using the OpenDaylight controller over an emulated network environment, shows that a trade-off between the quality of the assessed TM and its impact on the network in terms of control messages can be found by properly tuning the number of measured flows.

中文翻译：

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混合 IP/SDN 网络中流量矩阵评估的可扩展和容错解决方案

软件定义网络 (SDN) 范式的出现代表了定义新网络管理解决方案的绝佳机会。在这项工作中，我们专注于从互联网服务提供商的角度定义和实现解决流量矩阵评估 (TMA) 问题的新技术。由于预算和技术限制，从传统 IP 网络到完全部署的 SDN 网络的迁移需要增量，本文提出了混合 IP/SDN 网络的混合测量和估计可扩展解决方案，通过利用可用性来准确解决 TMA 问题。 SDN 交换机中的流规则计数器。性能评估表明，我们的容错解决方案能够通过仅测量一小部分流量来以可忽略的估计误差评估 TM，克服文献中提出的其他最先进的算法。此外，在模拟网络环境中使用 OpenDaylight 控制器的拟议实现的性能分析表明，可以通过适当调整控制消息来找到评估 TM 的质量与其对网络的影响之间的权衡测量流量的数量。