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Overview of IP Fast Reroute Solutions

机译：IP快速REROUTE解决方案概述

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摘要

IP Fast Reroute (IPFRR) is resiliency technology to provide fast traffic recovery upon link or node failure for mission critical services. This technology is able to recover impacted traffic in 50 ms upon any single link or node failure. The key aspect of IP Fast Reroute technology is fast failure detection and pre-calculation of alternative path in advance, before the link or node failure occurs. If specific failure within the network occurs, IP Fast Reroute mechanism uses this pre-calculated alternative path to bypass failure and restores communication. In this paper, we bring survey of advanced Fast Reroute solutions for IP-based intra-domain networks. There have been several approaches proposed such as Directed LFA, Topology Independent LFA, BIER-TE FRR and others.
机译：IP Fast REROUTE（IPFRR）是弹性技术，可根据关键任务服务的链路或节点故障提供快速流量恢复。在任何单链路或节点故障时，该技术能够在50 ms中恢复受影响的流量。在发生链路或节点故障之前，IP快速REROUTE技术的关键故障检测和替代路径的预先计算。如果发生网络内的特定故障，则IP快速REROUTE机制使用此预先计算的替代路径来绕过故障并恢复通信。在本文中，我们为基于IP的域内网络进行了高级快速REROUTE解决方案的调查。已经提出了几种方法，例如指示LFA，拓扑独立LFA，Bier-Te FRR等。

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