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Adaptive post-failure load balancing in fast reroute enabled IP networks

Adaptive post-failure load balancing in fast reroute enabled IP networks,10.1109/INM.2011.5990548,Ning Wang,Abubaker Fagear,George Pavlou

Adaptive post-failure load balancing in fast reroute enabled IP networks  
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disrupted due to post-failure traffic congestion. Such a situation could be more severe in operational networks with highly dynamic traffic patterns. In this paper we propose a distributed technique that enables adaptive control of FRR protection paths against dynamic traffic conditions, resulting in self-optimisatio n in addition to the self-healing capability. Our approach is based on the Loop-free Alternates (LFA) mechanism that allows non-deterministi c provisioning of protection paths. The idea is for repairing routers to periodically re-compute LFA alternative next-hops using a lightweight algorithm for achieving and maintaining optimised post-failure traffic distribution in dynamic network environments. Our experiments based on a real operational network topology and traffic traces across 24 hours have shown that such an approach is able to significantly enhance relevant network performance compared to both TE-agnostic and static TE-aware FRR solutions.
Conference: Integrated Network Management , 2011
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