Online traffic engineering: A hybrid IGP+MPLS routing approach
The dualism of IGP and MPLS routing has raised a debate separating the IP community into divergent groups expressing different opinions concerning how the future Internet will be engineered. This paper presents an on-line traffic engineering model which uses a hybrid IGP+MPLS routing approach to achieve efficient routing of flows in IP networks. The approach referred to as Hybrid assumes a network-design process where an optimal network configuration is built around optimality, reliability and simplicity. The IGP+MPLS routing approach is applied to compute paths for the traffic offered to a 50-node network. Simulation reveals performance improvements compared to both IGP and MPLS routing in terms of several performance parameters including routing optimality, network reliability and network simplicity. © Springer-Verlag Berlin Heidelberg 2004.