Performance evaluation of a Linux DiffServ implementation
This paper aims to discuss the possibilities and the limitations of differentiated services (DiffServ) based on end-to-end performance measurement results obtained with a DiffServ implementation on Linux routers. The paper describes methods for end-to-end performance measurements of bandwidth, delay, and jitter for both TCP and UDP flow. The measurement results show that both per-hop-behaviours-expedited (EF) and assured forwarding (AF)-are able to provide a guaranteed bandwidth together with a very small delay and jitter even in a highly congested network as long as sufficient network resources are provisioned. The results further show that not only EF but also AF can be used to provide low delay services. (C) 2002 Elsevier Science B.V. All rights reserved.
performance evaluation differentiated services quality of service