All You Need To Know About SDN Application

All You Need To Know About SDN Application

What is Software-Defined Networking (SDN) Application?
Software-defined networking application is a software program which is designed to perform a task in a software-defined networking environment. It is that approach to computer networking that not only allows network administrators to change programmatically, control, initialize, and manage network behaviour dynamically through open interfaces but also provides the concept of lower-level functionality. SDN applications also help in enlarging and substituting upon functions that are accomplished in the hardware devices of a regular network through firmware.
SDN could influence as much as 40% of all networking spending within the next few years – SDN Market Size Expected to Reach $35B by 2018,” SDN Central, April 24, 2013
With the help of SDN, the administrators are able to manage and control the entire network through the abstraction of higher-level functionality.  Even though management is abstracted, there has to be some kind of communication between the two planes, i.e. the control plane and the data plane.

Control plane – This system manages how traffic is distributed and where it is being sent.

Data plane – The underlying system helps in controlling traffic destination.

SDN application environment

Internal SDN Applications

Applications that are hosting the rest of the OpenDaylight controller software and are deployed internally, run inside the container. These applications must be written in the native language which is Java for ODL. Internal SDN applications must also adhere to the execution and design constraints of the controller. It must also execute in the same Java Machine as the controller which means that these types of the application must run locally with the controller. It can also access the MD-SAL applications and Java APIs of the controller running inside the controller’s OSGi container.

External SDN Applications

Applications that are hosting the rest of the Open Daylight controller software, and are deployed externally, run outside the container. Any language can be used for writing External SDN applications that is even scripting languages such as Bash. These applications can be run remotely which means on a different host than the controller. These applications will also use the application providing Restful access to their services and REST API provided by the controller.

Top Apps and Service that can benefit from SDN are:

Security services

The modern virtualization ecosystem supports specific virtual service that is running within the network layer. It means an incorporating function like NFV into SDN platforms. This type of network security creates a genuinely proactive environment that is capable of risk reduction and responds to the incidents very quickly. Whenever a violation occurs, every second is quite critical to stop the attack. It is also essential to identify the attack and also to ensure that other network components are safe from the attack. As the organization in the modern era becomes even more digitized, and as the network layer becomes even more critical, we will see even more attacks and more advanced sophisticated advanced persistent threats. You will be able to create a more proactive environment that is capable of responding to the changes if you integrate potent services into the SDN layer.

Network Monitoring and Intelligence

Modern SDN technologies help in abstracting one of the most critical layers within the data centre that is the network. Network architectures are very much complicated and have to handle a lot more data than ever before. This means it’s critical to know what is following through your environment. Do you have remission issues on a port? What will happen if you are running heterogeneous network architecture? Or, are you passing a lot of traffic and are heavily virtualized through the network architecture? All of these challenges or issues are diminished if you have a solid network monitoring and intelligence layer. However, you also gain benefit and true insight if you integrate these technologies into your SDN architecture. Even optimization, alerting, hypervisor integration, port configurations, and traffic flow can be incorporated into network monitoring and intelligence technologies. Also, these types of agile systems will also help you to monitor network traffic between your cloud ecosystem and your data centre.

Bandwidth Management

With the help of SDN applications, operators can use bandwidth management to ensure the end users to receive online video watching and optimal browsing experiences. This SDN application can also monitor the bandwidth requirements then provision user flows to match the latency and bandwidth requirements of the layer 7 application. This type of application-aware approach to bandwidth management will also ensure a better user experience with zero buffering through better video playback. At this stage in the game, there is little doubt that SDN is becoming a reality in operator networks.

However, it is the SDN applications that will really bring powerful improvements to operator’s business and networks, beyond the immediate impact of simpler management of the network. And so the network infrastructure providers need to start mapping out this future to calculate all the potential that can be provided by SDN.By acting and thinking ahead on SDN applications now, network infrastructure operators and providers will be able to rapidly evolve to provide flexible, customized networks that can entirely enhance their own bottom lines and can also enhance the end user experience.

Content Availability

There will be content servers used for media delivery or caching, on a service-provider edge network. These are installed by the content delivery network or operator service providers. Content that is to be served to the users is distributed and preoccupied across multiple content servers and also across various geographies in some cases.

SDN apps will be able to provision flows in the network based on the availability and types of the content which is built to handle content availability. SDN applications can also check the availability of the content in the content servers before routing requests to servers. A content-routing application will provide intelligence on its availability along with enabling discovery of content in the content servers.

This intelligence can be further used to route requests to the correct servers wherever the content is residing. Therefore, SDN application will direct requests from those websites which are non-cache-able and that generate active content to a server that provides active content rather than a caching server which significantly reduces network discontinuation.

Regulation and Compliance-Bound Applications

Network points, network traffic travelling between switches, and even hypervisors can be controlled in SDN architecture. You should also remember that this layer abstracts virtual hardware and functions controls. This powerful layer can then span various virtualization points, locations, and even cloud locations.

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Written by Shayamal Kumar

Lavelle Networks offers an SDN networking platform that solves the biggest challenges to enterprises connecting over the WAN. All users, locations and cloud networks are connected using a patent pending user interface & SDN gateways, which can manage with amazing levels of visibility


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