CONTROL AND MANAGEMENT SOFTWARE FOR SDNS: CONCEPTUAL MODELS AND PRACTICAL VIEW NATA LIA CA S T RO F ER NA N DES AND LU I Z CL AU DIO SCH ARAM AGA LH Ã ES

SDN Controllers 99 Intelligent Route Service Control Point 99 Secure Architecture for the Networked Enterprise and Ethane 100 OpenFlow Reference Controller 101 Nox 102 Onix 103 Beacon 104 Other Controllers 105

Hybrid Control Approaches 105 Distributed Flow Architecture for Networked Enterprises 106 Devolved Flow 108 Discussion 109

Wireless and Optical SDN Models 110 Optical SDN Models 110 Wireless SDN Models 111

Case Studies 112 Simple Application Examples 113

L2 Switching 113 Routing 113

Software defined networks (SDNs) are based on the separation of data and control planes. The control plane abstraction allows an easy deployment of network applications based on a central view of the network and also allows an unprecedented high-level view of network configuration. The network operating system, which is the software inside the network controller, provides a simple programming interface and a topological view of the network, which simplifies the tasks of network engineers.