Data Center Network Manager (DCNM), now superseded by Nexus Dashboard Fabric Controller (NDFC), is Cisco's version of an EVPN fabric controller. DCNM, or NDFC, has three essential primary components. Spines that act like physical aggregation points for all of the leaves. Leaves provide endpoint aggregation and link to the spine. The last essential component is the controller, which in the case of DCNM is a single device or HA pair, and for NDFC, it is a Nexus Dashboard cluster with a loaded NDFC application. In most cases, DCNM or NDFC will utilize OSPF for the underlay and VXLAN EVPN with MP-BGP as the overlay on Nexus 9000 switches. These fabric controllers are easier to use than similar fabric technologies on smaller to medium size networks, as most variables work out of the box without needing to change them. To what is known in the industry as a point and click your way to happiness.