QOS evaluation model for a campus-wide network: an alternative approach focussing on availability

This paper discusses a model for evaluating the quality of service (QOS) of a campus-wide network. The main goal is to achieve a mathematical model th at can be applied to any network, providing its availability. The network w here it will be tested has more than 5000 nodes with SNMP managed network d evices. The model discards the classical approach to QOS that considers parameters such as delay or jitter. Instead, we evaluate quality as a function of the availability indexes for either the services or the network itself. Once the model is described, we will explain how it has been implemented at the Universitat Autonoma de Barcelona Campus network and the requirements- software and hardware-to install such a system in any network. (C) 2001 Els evier Science B.V. All rights reserved.