IP流量弹性保护策略研究

Study of IP traffic resilient protection mechanisms

典型的IP网对链路故障的反应是在故障被发现后寻找一条替换的传输路径,这样做的结果是在收敛时间内失效链路上的流量会丢失。然而,IP流量可以使用三层以下的技术来保护。本文研究了IP流量保护机制,分析了路由器的线性SDH自动保护倒换,MPLS快速变更路由,弹性分组环保护,不同的保护方法共存和过失处理机制。

Typically IP networks respond to a link failure by finding an alternate traffic path alter the failure is discovered. This results in a convergence time during which traffic may be dropped at the failed link. However, IP traffic can be protected using techniques below layer 3. This article study of IP traffic protection mechanisms, analysis of linear SDH automatic protection switching for routers, MPLS fast reroute , Resilient Packet Ring protection, coexistence of various protection methods and defect disposal mechanism.