Internet topology: connectivity of IP graphs

  • Broido A
  • Claffy K
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Abstract

In this paper we introduce a framework for analyzing local properties of Internet connectivity. We compare BGP and probed topology data, finding that currently probed topology data yields much denser coverage of AS-level connectivity. We describe data acquisition and construction of several IP- level graphs derived from a collection of 220 M skitter traceroutes. We find that a graph consisting of IP nodes and links contains 90.5{\\ } of its 629 K nodes in the acyclic subgraph. In particular, 55{\\ } of the IP nodes are in trees. Full bidirectional connectivity is observed for a giant component containing 8.3{\\ } of IP nodes.

Author-supplied keywords

  • 3
  • active probing
  • and in
  • fchmo1
  • giant compo-
  • internet topology
  • ipv4 global address space
  • lected to stratify the
  • of methods described here
  • probed are specifically se-
  • the ip destination addresses
  • via a variety
  • weibull

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Authors

  • Andre Broido

  • K C Claffy

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