Achieving near-optimal traffic engineering solutions for current OSPF/IS-IS networks

Traffic engineering aims to distribute traffic so as to "optimize" some performance criterion. This optimal distribution of traffic depends on both the routing protocol and the forwarding mechanisms in use in the network. In IP networks running the OSPF or IS-IS protocols, routing is over...

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Bibliographic Details
Published in:IEEE/ACM transactions on networking 2005-04, Vol.13 (2), p.234-247
Main Authors: Sridharan, A., Guerin, R., Diot, C.
Format: Article
Language:English
Subjects:
Aggregation
Communications networks
Computer networks
Cost function
Internet Protocol
IP (Internet Protocol)
IP networks
Multiprotocol label switching
Networks
Optimization
Reliability engineering
Resource management
Routing
Routing (telecommunications)
Routing protocols
Shortest-path problems
Studies
Systems engineering and theory
Telecommunication traffic
Traffic control
Traffic engineering
Traffic flow
Web and internet services
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Summary:Traffic engineering aims to distribute traffic so as to "optimize" some performance criterion. This optimal distribution of traffic depends on both the routing protocol and the forwarding mechanisms in use in the network. In IP networks running the OSPF or IS-IS protocols, routing is over shortest paths, and forwarding mechanisms distribute traffic "uniformly" over equal cost shortest paths. These constraints often make achieving an optimal distribution of traffic impossible. In this paper, we propose and evaluate an approach that can realize near optimal traffic distribution without changes to routing protocols and forwarding mechanisms. In addition, we explore the tradeoff that exists between performance and the configuration overhead that our solution requires. The paper's contributions are in formulating and evaluating an approach to traffic engineering in IP networks that achieves near-optimal performance while preserving the existing infrastructure.
ISSN:1063-6692
1558-2566
DOI:10.1109/TNET.2005.845549