An unexpected consequence of recent worm attacks on the Internet was
that the routing infrastructure showed evidence of increased BGP
announcement churn. As worm propagation dynamics are a function of the
topology of a very large-scale network, a faithful simulation model
must capture salient features at a variety of resolution scales. This
paper describes our efforts to model worm propagation and its affect
on routers and application traffic. Using our implementations of the
Scalable Simulation Framework (SSF) API, we model worm propagation,
its affect on the routing infrastructure and its affect on application
traffic using multiscale traffic models.