# Kb271

## Emulab FAQ: Using the Testbed: Available network topological data

>I'm trying to find the router-level topology data for any big >networks, like Abilene or some big ISPs, for a research on setting up >connections among end hosts and networks, but I'm having a hard time >to reach the right persons or sources of the data. Can any one please >point me to the right direction to where I can possibly get the data.

The Rocketfuel work comes to mind, specifically their 2002 SigComm paper. The data is there to download, too. See http://www.cs.washington.edu/research/networking/rocketfuel .

Also see /share/data/rocketfuel on Ops for a copy of the data, and some little scripts we once used to transform the ISP data for our purposes. More details in the README.txt file there.

Note one point to be wary of: Rocketfuel often uses incomplete data, and several of the graphs are not fully connected. Therefore, when using a Rocketfuel topology, be sure to check for connectivity, and if it isn't fully connected, possibly just use the largest partition.