Design and Analysis of Flow Aware Load Balancing Mechanisms for Multi-Service Networks

Andrés Ferragut, D. Kofman, Federico Larroca, S. Oueslati
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引用次数: 4

Abstract

Ethernet technology is being deployed in metro and wide area networks. However, despite recent evolutions, Ethernet cannot be considered a carrier class technology due mainly to the lack of facilities for efficient traffic engineering (TE). In this article, we propose a Flow-aware TE approach for carrier class Ethernet networks providing services like those defined by the Metro Ethernet Forum. The flow-aware networking approach we consider is based on the Cross-protect router mechanisms, allowing satisfactory quality for streaming and elastic flows without explicitly identifying traffic classes by the combined use of fair queuing and admission control. Our proposal applies specifically to architectures where a tunnel is established between ingress and egress nodes (like Ethernet over MPLS). In this specific context, the Cross-protect mechanisms are applied on a per tunnel basis. We analyze the proposed approach in terms of flow blocking probabilities for which explicit formula are derived. We also extend the study framework to the case where several paths are established between a pair of ingress/egress nodes, and propose a simple load balancing scheme. We analyze its performance and derive approximate formula for the flow blocking probability in this case. The analysis is validated by extensive simulations.
多业务网络流感知负载均衡机制设计与分析
以太网技术正在城域网和广域网中部署。然而,尽管最近发展,以太网不能被认为是一种载波级技术,主要原因是缺乏有效的流量工程(TE)设施。在本文中,我们提出了一种流量感知TE方法,用于运营商级以太网网络,提供类似城域以太网论坛定义的服务。我们考虑的流量感知网络方法基于交叉保护路由器机制,允许流和弹性流的满意质量,而无需通过公平排队和准入控制的组合使用显式识别流量类别。我们的建议特别适用于在入口和出口节点之间建立隧道的体系结构(如MPLS上的以太网)。在这个特定的上下文中,交叉保护机制是基于每个隧道应用的。我们从流阻塞概率的角度分析了所提出的方法,并推导出了明确的公式。我们还将研究框架扩展到一对入口/出口节点之间建立多条路径的情况,并提出了一个简单的负载平衡方案。对其性能进行了分析,并推导出这种情况下流阻塞概率的近似公式。通过大量的仿真验证了分析的正确性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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