These communications should ideally follow well defined standards to facilitate

These communications should ideally follow well

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These communications should ideally follow well-defined standards to facilitate easy adoption and make the SDN architecture vendor independent. The standard bodies define several of the southbound messages. Applications can use the northbound messages to extract information about the
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network. Programmable Control Plane Programming the control plane allows different parts of the network to communicate absolutely and gives a network flexible adoption control. SDN controller software runs on a separate hardware and thus providing centralized access to the entire network. Business Values of SDN Automation through network programmability (by using a DevOps method for the network) is one of the methods in which IT can check the costs associated with rapid growth without burning out engineers. Flexibility: IT groups could turn more agile, and the deployment backlogs could become less problematic. Departments can self-select services namely third party, external, and internal cloud services. Business Values of SDN Automation: It can easily include features (such as add policies, provision) to devices, workloads, segment, and cloud resources. Visibility drives speed: Provides a holistic view of application connectivity and external needs (branch, device). Applications can ask for resources, routes, and instantaneously access heat maps (by the application) of traffic across the campus and data center. Revenue generation (for SPs): Innovation in software can accelerate service delivery. Service providers can provide more value-added services to customers. Overview of SDN is Open Flow - General Myth Reality: OpenFlow is the protocol that allows the SDN controllers to communicate with the forwarding plane of network devices. It is considered one of the first software-defined networking (SDN) standards. An SDN Controller is the “brain” of the SDN network. Any device that wants to communicate to an SDN Controller must support OpenFlow
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protocol. Through the OpenFlow, the SDN Controller pushes down changes to the switch or router flow-table allowing network administrators to segment traffic, control flows for optimal performance, and start testing new configurations and applications. OpenFlow has been managed by the Open Networking Foundation (ONF), a user-led organization dedicated to open standards and SDN adoption. Since its release, multiple companies and projects like the OpenDaylight Project support OpenFlow and also provide OpenDaylight Controllers. Other companies like Cisco and Brocade also offer OpenFlow enabled controllers, with Cisco XNC and Brocade Vyatta Controller. Benefits of OpenFlow Programmability: Programmabilty enables innovation/differentiation. Accelerate new features and services introduction. Centralized Intelligence: Simplify provisioning. Optimize performance. Granular policy management. Abstraction: Decoupling of Hardware and Software, Control plane and forwarding Physical and logical configuration. SDN OpenDayLight OpenDaylight is an open source SDN controller, founded by the Linux Foundation. It is the popular open source SDN controllers at the moment.
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  • Winter '17
  • Parth

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