Reading counter information of flow editing devices

Track all Sdn enable devices.

Determines how forwarding devices are Interconnected and Create a topology graph.

Discover where IP address and MAC addresses of hosts are located on the network

Controlling network behavior

VMware NSX is a network virtualization and security platform that enables the virtual cloud network, a software-defined approach to networking that extends across data centres, clouds and application frameworks. NSX is a commercial solution that delivers a fully functional network in software, provisioned independent of the underlying networking devices, entirely based around SDN principles[3]

Provide equipment to process computational issues that are hunger for resources

improve different challenge management from different resources

SDDC transport flexible design including administrate, operate of cloud infrastructure.

enhance networks to permit the changing system requirements

Cloud employees use such as google, yeahoo processors parallel algorithms very large scale to manage the challenges of scalability.

Companies use services of high performance to secure the efficient connectivity between physical servers

determine and minimize policy conflicts among SDN controllers.

Enhance the ability of the network by switching circuit performance and enabling to save great bandwidth for application.

Enhance the ability of the network by switching circuit performance and enabling to save great bandwidth for application

Provide infinite resource elastic provisioned which is based on users demands

Applications that have storage wide are very easy to manage through the cloud

Cloud able to reduce the technology high cost spending for large and medium companies

The software-defined wide area network (SD-WAN) is a natural application of SDN that extends the technology over a WAN. SD-WAN lets companies aggregate a variety of network connections – including MPLS, 4G LTE and DSL – into a branch or network edge location and have a software management platform that can turn up new sites, prioritize traffic and set security policies.[4]

management and retrieving information would be applied from one logical point (controller) resulting uniform network.

2-Software installed on your own server (or In the Cloud like amazon cloud cisco cloud

2-FORCES (FORWARDING AND CONTROL ELEMENT SEPARATION) (configuration roles)

3-OVSD(OPEN V SWICH DATA BASE MANAGMENT PROTOCOL) (configuration roles)

network switches become simple forwarding devices and the control logic is implemented in a logically centralized controller(or network operating system1)

simplifying policy enforcement(policy decisions regarding : routing, forwarding, redirecting, load balancing), network (re)configuration ,evolution
and less error

separating the network’s control logic (the control plane) from the underlying routers and switches that forward the traffic (the data plane)

Control logic is moved to an external entity, called SDN controller or NOS. The NOS is a software platform that runs on commodity server technology and provides the essential resources and abstractions to facilitate the programming of forwarding devices based on a logically centralized, abstract network view

Protocol specification between control and forwarding elements

Simplification of SDN and control capabilities for optical transport

Simplification of SDN and control capabilities for wireless transport

[1] N. Rani and A. Ali, “Software Defined Networking : Motivation , Challenges and Architecture,” vol. 7, no. 3, pp. 741–752, 2020.

[2] H. Anderson, S. Yull, and B. Hellingsworth, “Networking concepts,” Higher National Computing, pp. 236–273, 2020, doi: 10.4324/9780080472935-9.

[3] Diego Kreutz. Paulo Esteves Verı´ssimo ISiamak Azodolmolky, Senior EEE et al., “Software-Defined Networking : A Comprehensive Survey,” vol. 103, no. 1, 2015.

Network device topology management. carry on the information about the interconnection details between network devices to the end-user devices

End-user device discovery, such as laptops

Flow management: carry on database of the flows and performed to ensure synchronization of the device flow entries with that database.

Use to deliver the data and content of network from cloud to users

Topology manager(maintain interconnection topology information)

has the capacity to centrally administer networks by virtualizing the data and network control planes, enabling users to deploy both physical and virtual components from a single location.

Faster innovation as a result of a network that is software-governed and doesn't require hardware upgrades.

Reduce costs in purchasing network equipment via migration to software on standard servers.

a greater capacity for service agility to accommodate new, quicker QoS launches.

NFVs can elastically scale up and down as needed by allocating more or fewer resources to its software components.

The plane where applications that rely on the network to provide services for end users and processes reside.

Disaggregate network control and forwarding tasks from switches and routers.

It enables a network component to interact with a component at a lower level.

SDN controllers route traffic based on network operator-set forwarding policies.

[1] Igor Godanj, Krešimir Nenadić, Krešimir RomićI “Simple Example of Software Defined Network, “International Conference on Smart Systems and Technologies (SST). IEEE, 2016.

[2] Han’guk T’ongsin Hakhoe. and Hanʼguk Chŏnja Tʻongsin Yŏnʼguso., “Software Defined Networking: A Reference Architecture and Open APis,”International Conference on ICT Convergence : October 15-17, 2012, Ramada Plaza Jeju Hotel, Jeju Island, Korea. IEEE, 2012.

in more than one SDN application running on a single controller. issues related to application prioritization and flow handling become important.

since As there are more large-scale commercial deployments so the issue related to coordination between applications, the lack of a standard northbound API,

Dynamic Host Control Protocol (DHCP), Domain name system (DNS), Content delivery network (CDN), hardware

Network Address Translation (NAT), Residential Gateway, Set Top Box hardware

virtual application is a pre- configured virtual machine image , ready to run on hypervisor virtual applications are a subset of the broader class of software appliances

orchestration :provide automated control and management network resource

abstraction :provide abstraction of network resource (flexibility for services)

East/westbound APIs, when we have distributed controllers(to transfer data between controllers),