Cisco VM-FEX license - license

Based on the IEEE 802.1Qbh port extender technology, Cisco Virtual Machine Fabric Extender extends the fabric from the switch chassis to the virtual machine (VM). Each VM is associated with a network adapter vNIC, which in turn is associated with a virtual Ethernet port on the parent switch. This dedicated virtual interface can be managed, monitored, and spanned in the same way as a physical interface. Local switching in the hypervisor is eliminated, with all switching being performed by the physical switch.