A Novel Approach for Fault Tolerance in MPLS Networks

There has been current demand on Internet Service Providers (ISPs) to provide Quality of Service (QoS) guarantees. Fault Tolerance is an important factor that needs to be considered to maintain the network survivability. It is the property of a system that continues to operate the network properly in the event of failure of some of its parts. There is no solution until now that can provide a recovery with no packet loss and delay at the same time. In addition, network resources such as bandwidth have to be significantly utilized. In this paper, we propose a novel approach for fault tolerance in MPLS networks that can easily handle single or multiple path failures. Our approach uses the (k, n) Threshold Sharing Algorithm with multi-path routing. Our approach guarantees to continue the network operation with no packet loss and recovery delay, and with reasonable network resource utilization.