对SDN控制器进行定性和定量评估

Pedro Bispo, Daniel Corujo, R. Aguiar
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引用次数: 12

摘要

随着连接设备数量的不断增加,网络领域提出了新的挑战。软件定义网络(SDN)为未来5G网络的部署提供了更大程度的动态性和简化性。在这种网络中,控制器通过南向(SB)接口应用基于流的规则来管理转发实体(如交换机),从而发挥主要作用。反过来,控制器本身可以通过高级网络功能提供的操作和策略,通过北向(NB)接口进行管理。SDN集成新机制和网络架构的增长导致了不同控制器解决方案的发展,具有各种各样的特点。尽管已有研究,但SDN控制器的最新评估仅关注性能,而不是最新的,因为最流行的控制器的新版本不断发布。因此,这项工作提供了对几个开源控制器(即OpenDaylight (ODL),开放网络操作系统(ONOS), Ryu和POX)的更广泛的研究,不仅评估了它们的性能,还以定性的方式评估了它们的特性。将性能作为SDN控制器的关键问题,我们通过使用Cbench工具对不同操作条件下的控制器进行基准测试,定量评估了几个标准。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A qualitative and quantitative assessment of SDN controllers
With the increasing number of connected devices, new challenges are being raised in the networking field. Software Defined Networking (SDN) enables a greater degree of dynamism and simplification for the deployment of future 5G networks. In such networks, the controller plays a major role by being able to manage forwarding entities, such as switches, through the application of flow-based rules via a southbound (SB) interface. In turn, the controller itself can be managed by means of actions and policies provided by high-level network functions, via a northbound (NB) interface. The growth of SDN integration in new mechanisms and network architectures led to the development of different controller solutions, with a wide variety of characteristics. Despite existing studies, the most recent evaluations of SDN controllers are focused only on performance and are not up to date, since new versions of the most popular controllers are constantly being released. As such, this work provides a wider study of several open-source controllers, (namely, OpenDaylight (ODL), Open Network Operative System (ONOS), Ryu and POX), by evaluating not only their performance, but also their characteristics in a qualitative way. Taking performance as a critical issue among SDN controllers, we quantitatively evaluated several criteria by benchmarking the controllers under different operational conditions, using the Cbench tool.
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