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BGP Zombies: An Analysis of Beacons Stuck Routes

  • Romain FontugneEmail author
  • Esteban Bautista
  • Colin Petrie
  • Yutaro Nomura
  • Patrice Abry
  • Paulo Goncalves
  • Kensuke Fukuda
  • Emile Aben
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11419)

Abstract

Network operators use the Border Gateway Protocol (BGP) to control the global visibility of their networks. When withdrawing an IP prefix from the Internet, an origin network sends BGP withdraw messages, which are expected to propagate to all BGP routers that hold an entry for that IP prefix in their routing table. Yet network operators occasionally report issues where routers maintain routes to IP prefixes withdrawn by their origin network. We refer to this problem as BGP zombies and characterize their appearance using RIS BGP beacons, a set of prefixes withdrawn every four hours. Across the 27 monitored beacon prefixes, we observe usually more than one zombie outbreak per day. But their presence is highly volatile, on average a monitored peer misses 1.8% withdraws for an IPv4 beacon (2.7% for IPv6). We also discovered that BGP zombies can propagate to other ASes, for example, zombies in a transit network are inevitably affecting its customer networks. We employ a graph-based semi-supervised machine learning technique to estimate the scope of zombies propagation, and found that most of the observed zombie outbreaks are small (i.e. on average 10% of monitored ASes for IPv4 and 17% for IPv6). We also report some large zombie outbreaks with almost all monitored ASes affected.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Romain Fontugne
    • 1
    Email author
  • Esteban Bautista
    • 2
  • Colin Petrie
    • 3
  • Yutaro Nomura
    • 4
  • Patrice Abry
    • 5
    • 6
  • Paulo Goncalves
    • 2
  • Kensuke Fukuda
    • 6
  • Emile Aben
    • 3
  1. 1.IIJ Research LabTokyoJapan
  2. 2.Univ Lyon, Ens de Lyon, Inria, CNRS, UCB Lyon 1LyonFrance
  3. 3.RIPE NCCAmsterdamNetherlands
  4. 4.The University of TokyoTokyoJapan
  5. 5.Univ Lyon, Ens de Lyon, Univ Claude Bernard, CNRS, Laboratoire de PhysiqueLyonFrance
  6. 6.NII/SokendaiTokyoJapan

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