Lot off good work done by Nopparat. Talented and just do it. This two Dell 2950 with 2x quadcore can run about 30 Virtual Servers.
Cabeling in colors. Blue for public, redundant on to Gb switches. Yellow for VMotion, and backup lan. Also redundant. 2x Orange fiberchanel to SAN and last but not least: dual power on two powergroups.