Abstract
Measurement studies of Internet topologies show that the degree distribution of the topologies exhibits a power-law attribute. However, it is apparent that only degree distributions do not determine the structure of ISP topologies, where ISP designs routerlevel topologies based on their own design policies. Other structural properties than degree distribution are important to generate realistic Internet topologies. In this paper, we develop a modeling method for generating realistic ISP Internet topologies that obey a power-law degree distribution and have similar structural properties observed in the measurement studies. Our modeling method adds nodes one by one, and each node connects to optimal nodes to minimize overall network-cost. Then we answer the following question: what design factors are important to form realistic Internet topologies? Our results show that the answers are node locations and traffic demands.
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