The Importance Of Resource Allocation And Scalability

Chen, J., Zhang, C., Jiang, H., Li, Y., Zhang, L., Robin, A., . . . Chopp, M. (n.d.).

A more proficient IT infrastructure is required as the use of more software increases the needs of powerful and faster PCs. One of the trends that can help this issue is Virtualization. This technology is described as the “abstraction” of the physical elements (such as network resources, operating system and storage) into virtual ones (Portnoy, 2012, p.2). Virtualization allows a physical machine to run several virtual machines (VM).

Haigh, J Phelps and CW Geib, 2002; T Hirsch et al., 2000 and JA Jore, 2001). They

In the present computer networks are being built by implementing complex protocols on an array of network devices such as routers, switches and middleware like ISD intrusion detection systems and firewalls systems. In order to allow the network to be modified to the changing environment, the network Administrator have to manually configures all new configuration policies by converting them into the low level commands that are supported by the system. Companies need to depend on the network vendors in order to deal with the problems related to security, scalability, manageability and other issues. Many efforts have been done to make the network programmable even before the SDN. Some of those are Forces (2003), Routing Control Platform (2004), Ethane (2007), and Open Flow (2008).

Network virtualization can be explained as a network environment in which multiple virtual networks coexist in the same physical device. A virtual network is a collection of network enabled virtual devices and virtual links. Network virtualisation segregate the existing Internet Service Providers (ISPs) into two separate entities. Infrastructure Providers (InPs);

“A model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources (e.g. networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction.”

Today we are living in the era of internet where everything depends on it. As the days and years passes, traffic on internet is increasing abundantly, users wants high speed internet which can give the result of their aspired question within a fraction of seconds. To accomplish the requirement of the user, the need for improvement of existing network architecture. Here comes the role of SDN which is an emerging network architecture, our project is based on it which is discussed in later chapters. In the introduction part we are going to check about SDN and its related components.

Software-defined networking (SDN) technology is an approach to computer networking that allows network administrators to programmatically initialize, control, change, and manage network behavior dynamically via open interfaces and provide abstraction of lower-level functionality. SDN is meant to address the fact that the static architecture of traditional networks doesn't support the dynamic, scalable computing and storage needs of more modern computing environments such as data centers. This is done by decoupling or disassociating the system that makes decisions about where traffic is sent (the SDN controller, or control plane) from the underlying systems that forward traffic to the selected

Software defined networking allows to experiment with new protocols and distribute it across the network. There are two modes across it

To reduce networks problem, we can use Software Defined Network. Software-Defined Networking (SDN) is an outgoing architecture that is progressive, manageable, cost-effective, and painful, making it ideal for the high-bandwidth, cheaper to build, powerfully faster and more skilled dynamic nature of today 's applications [2]. SDN demands to reduce this effort dramatically [4]. SDN is called the birds-eye perspective on a network. The idea behind it is middle "intelligence" that is able to looking the big picture and is thus able to control and optimistic data streams better and efficiently. Adopting an SDN methodology has a countless of benefits including facility, scalability, thickness, and performance [4]. In addition, a growing network

The implementation of this project makes use of a lot of modern technologies. However, the state of art technology in this project is Software Defined Networking [1]. In the Networking community, SDN

Software Defined Network (SDN) Controllers are software applications that are able to perform network functions in an independent manner. They work as the brain of the network and take decisions based on fixed policies and the load present on the network, just like physical switches and network modules. SDNs are the technology of the future, and researchers around the world are eager to produce applications that employ them in various applications. Currently, researchers are finding out the important parameters of SDNs in order to use them on a larger, more unified scale. We will take a look at some important literature studies that have been recently presented on the topic of SDNs. Most of these studies were represented as conference

Applications are the engine for modern businesses driving innovation, operational efficiency and revenue generation. They demand an infrastructure that is highly agile and is easy to manage, while reducing overall costs. Typically residing in the data centers, these applications, which include mission critical systems, multitier Web applications, Big Data, etc. has placed new constraints on the networking infrastructure. Additionally, many such applications often consist of both physical and virtualize workloads, adding to

Now a day’s it is important to have centralize control over the resources rather than distributed one. In current network architectures, the network devices are bundled with a specialized control plane and various specialized features. This essentially binds us with the features shipped with the device. SDN breaks

SDN topology should be designed to provide support to existing traditional applications and at the same time, offer better network control, performance, and reliability.