International Research Journal of Engineering and Technology (IRJET) Volume: 04 Issue: 02 | Feb -2017
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e-ISSN: 2395 -0056 p-ISSN: 2395-0072
SDN: A New Approach to Networking Technology Afshan Rehman1, Dr D Annapurna2 1
Research Scholar, PESIT-Bangalore South Campus, Bangalore, India 2Professor, PESIT-Bangalore South Campus, Bangalore, India
------------------------------------------------------------------------***------------------------------------------------------which allowed programmability by the implementation Abstract - In an era where Information Technology is in
of open interfaces in each node of a Network. Next we have the separation of the control plane from the data plan and lastly we have the OpenFlow protocol[9] and Network Operative System(NOS). OpenFlow is the basic element for the solutions pertaining SDN. It is an open standard that allows researchers to execute experimental protocols in the campus Networks that we use on a daily basis.
complete boom, we have multiple technologies working together to provide solutions and services. The basis of their interconnection being Networks. It is not possible to use the traditional networks for their connection as it has many drawbacks such as high cost, no flexibility, manual configuration is compulsorily etc. Hence, here we can see the evolution and a drift in the hardware perspective i.e moving to software in terms of functioning of networks(SDN). The expectation from today’s networks is the implementation of virtualization of as many devices possible combined with the concept of programmability, to create efficient networks which are in their evolving stages. One such Network is the SDN wherein we eliminate as many hardware connections and replace it with softwares which are quick in reconfiguration and very efficient.
With regards to the hardware components every time a new function is required, these are carried out in the hardware environment. NFV is a new approach which is established on the concept of Virtualized Network Function (VNFs) whose target is to reduce the cost related to the deployment and management of all the new network applications. NFV depends upon traditional server virtualization but also differs from it. Virtual Network Platform may compose of one or more VM’S running different softwares and processes which runs on top of standard high-volume servers, switches and storage devices or even cloud computing framework rather than having custom hardware devices for each Network function. The implementation of partition of control plane and data plane can be carried out by a well illustrated interface between the switches and the SDN controller.
Key Terms: Virtualization Network, FlowVisor, Network Function Virtualization(NFV), Software Defined Networks(SDN)
I. Introduction In the world of exponentially growing information technology where communication plays a critical role, we can see the rapid evolution of programmable network configuration and management. This is implemented by combining the concepts of Software Defined Networks (SDNs) and Network Virtualization to cater flexible networks which can be easily re-configured [1].
In the current times, devices such as load balancers and firewall are carried out in a hardware environment; NFV’s main aim is to move these functions to the software surroundings. This would result in the reduced expenses in the provisioning and management of telecom services. NFV and SDN are two different terminologies which go hand in hand, whose relationship would be seen further in this paper.
The concept of Network Function Virtualization is also introduced here which is the elevation of Network Virtualization, here the aim is to virtualize those functions of the network that are typically implemented by dedicated hardware devices like routers, firewalls and load balancers.
II. Related Work Virtualisation Network: The very first
The main design aspect of a Software Defined Networks (SDNs) is to separate the control and the data panel in the networking devices to enhance the ability to program the network [1].
Virtualization is quiet an old concept, wherein the first device to be virtualized was memory. In today’s time it is even possible to virtualize the OS, storage capabilities and even the computer hardware and networks [1]. Virtualization is basically the abstraction of logical assets from the physical assets [2]. In this particular sense, Network Virtualization allows multiple simultaneous Virtual Networks on top of a physical network as shown in Fig.1.
An exhaustive study of the benefits of the SDN network and the threats that can be expected while using SDN is mentioned in [2]. The concept of SDN is not completely novel, rather it has evolved in three phases in the history of Networks First of all we had the active Networks
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