期刊名称：International Journal of Computer Technology and Applications
电子版ISSN：2229-6093
出版年度：2013
卷号：4
期号：1
页码：78-83
出版社：Technopark Publications
摘要：In order to provide reliable services MPLS network uses set of procedures (fault detection, fault notification and fault recovery) which provide appropriate protection to the traffic carried in active LSP (Label Switching Path). When fault occur in active LSP, the recovery scheme must re-direct the affected traffic to the recovery path which bypass the fault. The two basic recovery mechanism defined by IETF used to re-direct affected traffic is rerouting and protection switching. In protection switching number of faults can be handled simultaneously in the active and recovery path and is faster as compared to rerouting switching. On the other hand, rerouting switching can utilize resources in an efficient way but is slower than protection switching. In this paper we present a survey of various fault recovery schemes, initially we start reviewing some approaches of protection switching then we discuss the characteristics of some rerouting approaches. Finally the review recovery mechanisms are classified according to the set of characteristics considered relevant
