December 1st, 2000
Differentiated Services (DiffServ) is a mechanism for supporting network Quality of Service (or QoS) whereby packets that are transmitted by a client program are marked with a priority setting that can be interpreted by the router to effect special treatment of the packet. In particular the marked packets are promoted to a higher priority queue in the router and, as a result, spend a minimum amount of time in the router. Packets that are not marked are attached to a lower priority queue, and in some cases may be dropped when congestion arises. A more detailed description of DiffServ may be found in the paper by Sander et al [Sander et al 2000].
A series of experiments were performed over a wide area DiffServ testbed as part of the EMERGE project. EMERGE is a Department of Energy funded project for designing, deploying and testing Differentiated Services on an IP / ATM Regional GigaPoP Network interoperating with ESnet for applications in Combustion, Climate and High-Energy Physics. The main participants of the experiments in this report were EVL and Argonne National Laboratory (ANL).
Leigh, J., Yu, O., Verlo, A., Roy, A., Winkler, L., DeFanti, T., Differentiated Services Experiments Between the Electronic Visualization Laboratory and Argonne National Laboratory, EMERGE Report, December 1st, 2000.