The Cisco Nexus 5k series switches have been created and developed to deliver the best high-density Layer 2 and Layer 3 10/40 GbE with undivided ports in 1-, 2- and 4- rack unit types. The Cisco Nexus 5000 Series brings you the Nexus 5500 and Nexus 5600 systems, under the Cisco Unified Fabric portfo