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The Strategic Justification for BGP

Author

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  • Levin, Hagay
  • Schapira, Michael
  • Zohar, Aviv

Abstract

The Internet consists of many administrative domains, or \emph{Autonomous Systems} (ASes), each owned by an economic entity (Microsoft, AT\&T, The Hebrew University, etc.). The task of ensuring interconnectivity between ASes, known as \emph{interdomain routing}, is currently handled by the \emph{Border Gateway Protocol} (BGP). ASes are self-interested and might be willing to manipulate BGP for their benefit. In this paper we present the strategic justification for using BGP for interdomain routing in today's Internet: We show that, in the realistic Gao-Rexford setting, BGP is immune to almost all forms of rational manipulation by ASes, and can easily be made immune to all such manipulations. The Gao-Rexford setting is said to accurately depict the current commercial relations between ASes in the Internet. Formally, we prove that a slight modification of BGP is incentive-compatible in \emph{ex-post Nash equilibrium}. Moreover, we show that, if a certain reasonable condition holds, then this slightly modified BGP is also \emph{collusion-proof} in ex-post Nash -- i.e., immune to rational manipulations even by \emph{coalitions} of \emph{any} size. Unlike previous works on achieving incentive-compatibility in interdomain routing, our results \emph{do not require any monetary transfer between ASes} (as is the case in practice). We also strengthen the Gao-Rexford constraints by proving that one of the three constraints can actually be enforced by the rationality of ASes if the two other constraints hold.

Suggested Citation

  • Levin, Hagay & Schapira, Michael & Zohar, Aviv, 2006. "The Strategic Justification for BGP," MPRA Paper 2110, University Library of Munich, Germany.
  • Handle: RePEc:pra:mprapa:2110
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    File URL: https://mpra.ub.uni-muenchen.de/2110/1/MPRA_paper_2110.pdf
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    References listed on IDEAS

    as
    1. Nisan, Noam & Ronen, Amir, 2001. "Algorithmic Mechanism Design," Games and Economic Behavior, Elsevier, vol. 35(1-2), pages 166-196, April.
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    More about this item

    Keywords

    Networks; Ex post Nash; Routing; rational manipulation; Border Gateway Protocol; Dispute Wheel;

    JEL classification:

    • D8 - Microeconomics - - Information, Knowledge, and Uncertainty
    • D7 - Microeconomics - - Analysis of Collective Decision-Making
    • D85 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Network Formation

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