A policy-based quality of service management system for IP DiffServ networks

Policy-based management can guide the behavior of a network or distributed system through high-level declarative directives that are dynamically introduced, checked for consistency, refined, and evaluated, resulting typically in a series of low-level actions. We actually view policies as a means of extending the functionality of management systems dynamically in conjunction with preexisting hard-wired management logic. In this article we first discuss the policy management aspects of architecture for managing quality of service in IP DiffServ networks as presented in [1], and focus on the functionality of the dimensioning and resource management aspects. We then present an analysis of the policies that can influence the dimensioning behavior as well as the inconsistencies that may be caused by the introduction of such policies. Finally, we describe the design an implementation of the generic Policy Consumer component and present the current implementation status.