Permutation Routing for Increased Robustness in IP Networks

  • Hung Quoc Vo
  • Olav Lysne
  • Amund Kvalbein
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7289)

Abstract

We present Permutation Routing as a method for increased robustness in IP networks with traditional hop-by-hop forwarding. Permutation Routing treats routers involved in traffic forwarding as a sequence of resources, and creates permutations of these resources that give several forwarding options. We introduce Permutation Routing as a concept, and use it to create routings where we seek to maximize single link fault coverage. Analogous to the IETF standardized Loop-Free Alternate (LFA), Permutation Routing can easily be implemented for OSPF or IS-IS networks to augment existing ECMP forwarding with additional loop-free forwarding entries for improved load balancing or fault tolerance. Our evaluations show that Permutation Routing can increase single link fault coverage by up to 28% compared to LFA in inferred network topologies.

Keywords

IP networks Multipath Routing Resilience Fault-tolerant 

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Copyright information

© IFIP International Federation for Information Processing 2012

Authors and Affiliations

  • Hung Quoc Vo
    • 1
  • Olav Lysne
    • 1
  • Amund Kvalbein
    • 1
  1. 1.Simula Research LaboratoryNorway

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