Online Traffic Engineering Using A Hybrid IGP+MPLS Routing Approach
نویسنده
چکیده
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. Hybrid uses a route optimization approach where an IP flow is routed along a path so that (1) the interference among the flows (which quantifies the network reliability) is minimized to re-route fewer flows under link failure and (2) the congestion distance (which quantifies the network optimality) is maximized to reject fewer flows under congestion. Hybrid implements a path selection model where flows are classified at the ingress of the network and handled differently in the core where low bandwidth demanding flows are routed using the OSPF model while high bandwidth flows are carried over MPLS tunnels. The IGP+MPLS routing approach is applied to compute paths for the traffic offered to a 50node 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.
منابع مشابه
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تاریخ انتشار 2004