Traffic engineering with traditional IP routing protocols

Bernard Fortz, Jennifer L. Rexford, Mikkel Thorup

Research output: Contribution to journalArticlepeer-review

340 Scopus citations


Traffic engineering involves adapting the routing of traffic to network conditions, with the joint goals of good user performance and efficient use of network resources. In this article we describe an approach to intradomain traffic engineering that works within the existing deployed base of interior gateway protocols, such as Open Shortest Path First and Intermediate System-Intermediate System. We explain how to adapt the configuration of link weights, based on a networkwide view of the traffic and topology within a domain. In addition, we summarize the results of several studies of techniques for optimizing OSPF/IS-IS weights to the prevailing traffic. The article argues that traditional shortest path routing protocols are surprisingly effective for engineering the flow of traffic in large IP networks.

Original languageEnglish (US)
Pages (from-to)118-124
Number of pages7
JournalIEEE Communications Magazine
Issue number10
StatePublished - Oct 2002

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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