



X. Dimitropoulos, M. Serrano, and D. Krioukov, "On Cycles in AS
Relationships", ACM SIGCOMM Computer Communication Review (CCR), vol. 38,
no. 3, pp. 102--104, Jul 2008.
On Cycles in AS Relationships
Several users of our AS relationship inference data, released with cs/0604017, asked us why it contained AS relationship cycles, e.g., cases where AS A is a provider of AS B, B is a provider of C, and C is a provider of A, or other cycle types. Having been answering these questions in private communications, we have eventually decided to write down our answers here for future reference.
Keywords: routing, topology