The cost of QoS support in edge devices an experimental study

This paper investigates the problem of making QoS guarantees available in access devices such as edge routers, that are commonly deployed in today's IP networks. In the paper, we propose a specific design which we evaluate by carrying out a complete implementation, whose performance we then measure in the context of an experimental testbed. Our results indicate that a reasonable level of service differentiation, i.e., rate and delay guarantees, can he provided with a minimal impact on the raw packet forwarding performance of edge devices. © 1999 IEEE.