DARPA: Tomography
Dynamic discovery of Net topologies -- correlation of
- BGP relationships for major ISPs
- performance info. between specific nodes
- characterization of specific paths, e.g. available bandwidth and throughput across specific links
Skitter -- up to 60,000 hosts; 200 kbit/sec w/ 200 sec poll cycle; record route conf. for spanning tree structure 9 hops into infrastructure (figure @ right); RTT & variance measured