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The Too-Big Trick (TBT) is a technique for IPv6 alias resolution via induced router fragmentation. Our work is detailed in a research paper that is currently under submission; please contact us for details or more information.


Alias resolution, the process of determining the set of interfaces corresponding to the same physical router, is a funamental requirement to accurately determine router-level network topologies (and, by extension, understand their security, robustness, and resilience properties). Many traditional methods for IPv4 alias resolution do not work for IPv6. Our technique provides a new and novel technique for IPv6 that is both reliable and widely applicable.


  • Billy Brinkmeyer (NPS)
  • kc claffy (CAIDA)
  • Matthew Luckie (CAIDA)
  • Robert Beverly (NPS)
  • Justin Rohrer (NPS)


Center for Measurement and Analysis of Network Data