SDN Pilot and Testbed

Current networks are based on hardware equipment, provided by manufacturer, in a single system package. The abilities of equipment are based on protocols, implemented by manufacturer, and clients cannot change or improve these capabilities. The distribution of equipment provides network control and necessary routes. The current approach has some limitations, which in recent years, with increase of traffic volume and more diversity of clients’ demands, more appearance has been shown:

  • There can be no general vision and concentration of network. Different equipment can identify network topology and routing process, by routing protocols.
  • For different requirements (routing, security, quality of service and etc.), different protocols are used, which will result in complexity of network equipment. Therefore, current networks are resistant and configurations are not changeable instantly. On the other hand, there are new services such as cloud computing and multimedia traffics, which contain more traffic diversity. As a result, current networks are not responsive to network requirements.
  • Since the implementation of general network policies (e.g. security policies, quality of service and etc.) are done through distribution, the assurance of completion in network is difficult.
  • Adding new equipment to network, for improving scalability, it’s not going to be easy and it would need to configure other network equipment, so that by using the distributed protocols, they can work with new equipment.
  • The dependency to equipment manufacturer exists and there is no protocol, mechanism, idea or a new method, which can be tested in real network.
Networks that need to support diversity and various services, will require necessary flexibility, therefore, new architecture based on SDN (Software Defined Networking) is introduced. SDN is the combination of techniques that provides design and operation of network services in diverse and complete clear vision. In this architecture, unlike traditional network architecture, which network equipment decide the routes and controlling traffics, the control of network is done through a centralized controller. In other words, instead of having all equipment with one control panel, all the processing of network control is centralized. As a result, planning and controlling the behavior of network equipment is possible for different traffics by the applications that are scalable over the controller. Network equipment act only as packet forwarder and necessary rules by the controller are applied and arranged on switches and they can be changed anytime. The advantages of SDN architecture is the following:
  • Controlling the network is independent from manufacturer and different protocols can be implemented over different operating applications.
  • Control and management of network can be done automatically, by operating applications in controller.
  • Better network control and accuracy, and also assurance of higher QoS and QoE, due to general vision of network in controller.
  • Optimal use of network resources based on different policies.
  • Implementing end-to-end security policies and quality of service in the network.
  • In order to check the capabilities of SDN functionality, FavaPars Corporation, has implemented a sample laboratory, which is a combination of tools, used in SDN networks.

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