A tree division approach to support local failure recovery for multicasting in MPLS networks

O. Banimelhem, A. Agarwal, J. Atwood
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引用次数: 1

Abstract

This paper introduces a novel approach to support local failure recovery in multicast trees. Although, the presented approach can be implemented in any large backbone network that employs multicast communication mode, we concentrate our discussion on MPLS networks. In the proposed approach, a multicast tree is divided into several domains where each domain represents a sub-tree of the original one. Backup paths are built between the root of the domain and each leaf router which is called a border router. Simulation results conducted on two network topologies show the performance of the proposed approach in terms of the total capacity required for reserving the backup paths and in terms of the maximum delay needed to notify about link/node failure. The results have shown that tree division approach compared with global recovery approach reduces the time needed to notify the router that is responsible for switching the traffic to the backup path.
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在MPLS网络中支持组播本地故障恢复的树形划分方法
提出了一种支持组播树局部故障恢复的新方法。尽管所提出的方法可以在任何采用多播通信模式的大型骨干网中实现,但我们主要讨论的是MPLS网络。该方法将组播树划分为若干个域,每个域代表原树的一个子树。在域的根节点和每个叶子路由器(称为边界路由器)之间建立备份路径。在两种网络拓扑上进行的仿真结果表明,所提出的方法在保留备份路径所需的总容量和通知链路/节点故障所需的最大延迟方面具有良好的性能。结果表明,与全局恢复方法相比,树划分方法减少了通知负责将流量切换到备份路径的路由器所需的时间。
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