Controller consolidation moves SDN closer to your network

In Software Defined Networking the controller is the focal point of network architecture, sitting between applications that will make demands of the network and the network devices themselves. For network professionals, the centralized controller takes on the role of the control-plane, where distributed routing protocols such as BGP and OSPF have traditionally sat.
We are still in early days of SDN with groups and vendors jockeying for position and dominance, and as such there are an abundance