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Telecommunication Systems

, Volume 52, Issue 2, pp 947–958 | Cite as

Comparison of IP-based and explicit paths for one-to-one fast reroute in MPLS networks

  • David HockEmail author
  • Matthias Hartmann
  • Michael Menth
  • Michał Pióro
  • Artur Tomaszewski
  • Cezary Żukowski
Article

Abstract

Primary and backup paths in MPLS fast reroute (FRR) may be established as shortest paths according to the administrative link costs of the IP control plane, or as explicitly calculated arbitrary paths. In both cases, the path layout can be optimized so that the maximum link utilization for a specific traffic matrix and for a set of considered failure scenarios is minimized. In this paper, we propose a linear program for the optimization of the path layout for explicitly calculated paths, which can either produce single paths and route entire traffic along those paths, or generate multiple paths and spread the traffic among those paths providing load balancing. We compare the resulting lowest maximum link utilization in both cases with the lowest maximum link utilization that can be obtained by optimizing unique IP-based paths. Our results quantify the gain in resource efficiency usage provided by optimized explicit multiple paths or explicit single paths as compared to optimized IP-based paths. Furthermore, we investigate if explicit path layouts cause an increased configuration effort compared to IP-based layouts and if yes, to what extend.

Keywords

Routing Multiprotocol label switching MPLS fast reroute Optimization Linear programs Performance comparison 

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • David Hock
    • 1
    Email author
  • Matthias Hartmann
    • 1
  • Michael Menth
    • 2
  • Michał Pióro
    • 3
    • 4
  • Artur Tomaszewski
    • 3
  • Cezary Żukowski
    • 3
  1. 1.Institute of Computer ScienceUniversity of WürzburgWürzburgGermany
  2. 2.Wilhelm-Schickard-Institute of Computer ScienceUniversity of TübingenTübingenGermany
  3. 3.Institute of TelecommunicationsWarsaw University of TechnologyWarsawPoland
  4. 4.Department of Electrical and Information TechnologyLund UniversityLundSweden

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