The ReAssure testbed is comprised of a firewall, a rack of experimental PCs, a control switch, a network "experimental" switch, a web server and an image server. The image server drives a RAID array and a backup system. We control the experimental switch through the serial port, using a library we developed (which is available for download). The host OS doesn't have an IP stack associated with interfaces connected to the experimental switch. Finally, all the network connections use Gbit links.