Engineering a New Loop-Free Shortest Paths Routing Algorithm

  • Gianlorenzo D’Angelo
  • Mattia D’Emidio
  • Daniele Frigioni
  • Vinicio Maurizio
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7276)

Abstract

We present LFR (Loop Free Routing), a new loop-free distance vector routing algorithm, which is able to update the shortest paths of a distributed network with n nodes in fully dynamic scenarios. If Φ is the total number of nodes affected by a set of updates to the network, and φ is the maximum number of destinations for which a node is affected, then LFR requires O(Φ ·Δ) messages and O(n + φ ·Δ) space per node, where Δ is the maximum degree of the nodes of the network.

We experimentally compare LFR with DUAL, one of the most popular loop-free distance vector algorithms, which is part of CISCO’s EIGRP protocol and requires O(Φ ·Δ) messages and Θ(n ·Δ) space per node. The experiments are based on both real-world and artificial instances and show that LFR is always the best choice in terms of memory requirements, while in terms of messages LFR outperforms DUAL on real-world instances, whereas DUAL is the best choice on artificial instances.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Gianlorenzo D’Angelo
    • 1
  • Mattia D’Emidio
    • 2
  • Daniele Frigioni
    • 2
  • Vinicio Maurizio
    • 2
  1. 1.MASCOTTE ProjectI3S(CNRS/UNSA)/INRIAFrance
  2. 2.Department of Electrical and Information EngineeringUniversity of L’AquilaItaly

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