Modeling and understanding end-to-end class of service policies in operational networks

Business and economic considerations are driving the extensive use of service differentiation in Virtual Private Networks (VPNs) operated for business enterprises today. The resulting Class of Service (CoS) designs embed complex policy decisions based on the described priorities of various applications, extent of bandwidth availability, and cost considerations. These inherently complex high-level policies are realized through low-level router configurations. The configuration process is tedious and error-prone given the highly intertwined nature of CoS configuration, the multiple router configurations over which the policies are instantiated, and the complex access control lists (ACLs) involved. Our contributions include (i) a formal approach to modeling CoS policies from router configuration files in a precise manner; (ii) a practical and computationally efficient tool that can determine the CoS treatments received by an arbitrary set of flows across multiple routers; and (ii...

• Type: Conference
• Year: 2009
• Where: SIGCOMM
• Authors: Yu-Wei Eric Sung, Carsten Lund, Mark Lyn, Sanjay G. Rao, Subhabrata Sen
• Keywords: Communications, Cos Configurations, Multiple Routers, Router Configuration, SIGCOMM 2009