Intra-Domain Routing Topology Bandwidth Management Architecture

In this paper, we define architecture of a system for managing network resources in a hierarchical OSPF routing domain supporting DiffServ, wherein resources in terms of bandwidth are dynamically allocated among data flows, each traversing the domain from an ingress edge router to an egress edge router. Specifically, we consider a bandwidth management system in a hierarchical routing domain, wherein each level of the hierarchy comprises a number of areas defined for that level. We propose two alternative approaches for bandwidth management in such a routing domain. In the first approach, the admission control function is centralized at a domain-level bandwidth management agent. In the second approach, bandwidth management functions are distributed among a number of bandwidth managers, and edge-to-edge session admission control is executed on an area-by-area basis.