The performance of measurement-based overlay networks

  • Authors:
  • Daniel Bauer;Sean Rooney;Paolo Scotton;Sonja Buchegger;Ilias Iliadis

  • Affiliations:
  • IBM Research, Zurich Laboratory, Rüschlikon, Switzerland;IBM Research, Zurich Laboratory, Rüschlikon, Switzerland;IBM Research, Zurich Laboratory, Rüschlikon, Switzerland;IBM Research, Zurich Laboratory, Rüschlikon, Switzerland;IBM Research, Zurich Laboratory, Rüschlikon, Switzerland

  • Venue:
  • QofIS'02/ICQT'02 Proceedings of the 3rd international conference on quality of future internet services and internet charging and QoS technologies 2nd international conference on From QoS provisioning to QoS charging
  • Year:
  • 2002

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Abstract

The literature contains propositions for the use of overlay networks to supplement the normal IP routing functions with higher-level information in order to improve aspects of network behavior. We consider the use of such an overlay to optimize the end-to-end behavior of some special traffic flows. Measurements are used both to construct the virtual links of the overlay and to establish the link costs for use in a link-state routing protocol. The overlay attempts to forward certain packets over the least congested rather than the shortest path. We present simulation results showing that contrary to common belief overlay networks are not always beneficial and can be detrimental.