Effects of Rerouting After Service Disruption in MPLS based networks

Abstract:- This paper considers the effects of dynamic restoration routing after a failure in MPLS based networks. MPLS technology enables scalable VPNs and end-to-end QoS over the Internet which requires efficient fault recovery in presence of link or node failures. A major factor on net-work performance after a failure is the transient congestion that results from restored connections trying to retransmit packets lost since the failure. We focus on the importance of appropriate se-lection of a rerouting algorithm to control the transient congestion, and we present results from a simulation-based performance study of several routing algorithms. The results show that proper selection of fault recovery routing algorithm can improve MPLS-network performance after a fail-ure.