On achievable service differentiation with token bucket marking for TCP

The Differentiated services (diffserv) architecture has been proposed as a scalable solution for providing service differentiation among flows without any per-flow buffer management inside the core of the network. It has been advocated that it is feasible to provide service differentiation among a set of flows by choosing an appropriate “marking profile” for each flow. In this paper, we examine (i) whether it is possible to provide service differentiation among a set of TCP flows by choosing appropriate marking profiles for each flow, (ii) under what circumstances, the marking profiles are able to influence the service that a TCP flow receives, and, (iii) how to choose a correct profile to achieve a given service level. We derive a simple, and yet accurate, analytical model for determining the achieved rate of a TCP flow when edge-routers use “token bucket” packet marking and core-routers use active queue management for preferential packet dropping. From our study...

• Type: Conference
• Year: 2000
• Where: SIGMETRICS
• Authors: Sambit Sahu, Philippe Nain, Christophe Diot, Victor Firoiu, Donald F. Towsley
• Keywords: Achieved Rate, Hardware, Marking Profiles, SIGMETRICS 2000, Tcp flow