This session presents an in-depth study of the architecture of the Nexus 5000 Data Center switch and the Nexus 2000 Fabric Extender. Topics include internal architecture of the Nexus 5000 and 2000, the architecture of VN-Link port extension as implemented in the Nexus 2000, Unified I/O, and 10G cut-thru Ethernet. What’s in a switch?