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Optimization of device selectionfor price and

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Optimization of device selection–for price and performance independently of services features. Continuous visibility of flows from source to destination. Common management framework for all devices. Programmability to shape network behaviour according to users’ needs. Automation of and by policy. How Does Software-Defined Networking Work? Software-defined networking providers offer a wide selection of competing architectures, but at its most simple, the Software-Defined Networking method centralizes control of the network by separating the control logic to off-device computer resources. All SDN models have some version of an SDN Controller, as well as southbound APIs and northbound APIs: Controllers: The “brains” of the network, SDN Controllers offer a centralized view of the overall network, and enable network administrators to dictate to the underlying systems (like switches and routers) how the forwarding plane should handle network traffic. Southbound APIs: Software-defined networking uses southbound APIs to relay information to the switches and routers “below.” OpenFlow, considered the first standard in SDN, was the original southbound API and remains as one of the most common protocols. Despite some considering OpenFlow and SDN to be one in the same, OpenFlow is merely one piece of the bigger landscape. Northbound APIs: Software-Defined Networking uses northbound APIs to communicates with the applications and business logic “above.” These help network administrators to programmatically shape traffic and deploy services. The Software-Defined Networking Framework Software-Defined Networking is Not OpenFlow, Often people point to OpenFlow as being synonymous with software-defined networking, but it is only a single element in the overall SDN architecture. OpenFlow is an open standard for a communications protocol that enables the control plane to interact
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with the forwarding plane. It must be noted that OpenFlow is not the only protocol available or in development for SDN. Software-Defined Networking Use Cases As detailed above, Software-Defined Networking offers several benefits for businesses trying to move into a virtual environment. There is a multitude of use cases for different organizations, including carrier and service providers, cloud computing and data centres, as well as enterprise campuses. For carrier and service providers, Software-Defined Networking offers bandwidth-on-demand, which gives controls on carrier links to request additional bandwidth when necessary, as well as WAN optimization and bandwidth calendaring. For cloud computing and data centres, network virtualization for multi-tenants is an important use case as it offers better utilization of resources and faster turnaround times for creating a segregated network. Enterprise campuses experience network access control and network monitoring when using Software-Defined Network (n.a 2017) Benefits of SDN : “SDN not only reduces the complexity seen in today's networks, but also helps Cloud
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  • Summer '17
  • Unknon
  • Computer network

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