Core Backbone Convergence Mechanisms and Microloops Analysis

In this article we study approaches that can be used to minimise the convergence time, we also make a focus on microloops phenomenon, analysis and means to mitigate them. The convergence time reflects the time required by a network to react to a failure of a link or a router failure itself. When all nodes (routers) have updated their respective routing and forwarding databases, we can say the network has converged. This study will help in building real-time and resilient network infrastructure, the goal is to make any evenement in the core network, as transparent as possible to any sensitive and real-time flows. This study is also, a deepening of earlier works presented in [10] and [11]. Keywords-component: FC(Fast-convergence); RSVP(ressource reservation protocol); LDP (Label Distribution Protocol); VPN(Virtual Private Network); LFA (loop free alternate); MPLS (Multiprotocol Label Switching); PIC(Protocol independent convergence); PE(Provider edge router); P(Provider core router ).