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NetScope: traffic engineering for IP networks
Citation key FGLRR-NTEIPN-00
Author Feldmann, Anja and Greenberg, Albert and Lund, Carsten and Reingold, Nick and Rexford, Jennifer
Pages 11–19
Year 2000
ISSN 0890-8044
DOI http://dx.doi.org/10.1109/65.826367
Journal IEEE Network Magazine
Volume 14
Number 2
Month March
Note Special Issue on Internet Traffic Engineering
Abstract Managing large IP networks requires an understanding of the current traffic flows, routing policies, and network configuration. However, the state of the art for managing IP networks involves manual configuration of each IP router, and traffic engineering based on limited measurements. The networking industry is sorely lacking in software systems that a large Internet service provider can use to support traffic measurement and network modeling, the underpinnings of effective traffic engineering. This article describes the AT\&T Labs NetScope, a unified set of software tools for managing the performance of IP backbone networks. The key idea behind NetScope is to generate global views of the network on the basis of configuration and usage data associated with the individual network elements. Having created an appropriate global view, we are able to infer and visualize the networkwide implications of local changes in traffic, configuration, and control. Using NetScope, a network provider can experiment with changes in network configuration in a simulated environment rather than the operational network. In addition, the tool provides a sound framework for additional modules for network optimization and performance debugging. We demonstrate the capabilities of the tool through an example traffic engineering exercise of locating a heavily loaded link, identifying which traffic demands flow on the link, and changing the configuration of intradomain routing to reduce the congestion.
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