SDN In Real World

SDN is the biggest and latest trend of evolving technology. It allows flexibility and agility in the virtual infrastructure. It is the main point of focus for the researchers and scientists. Using SDN is a very cost effective and efficient approach.

SDN is everywhere but unfortunately many people are unable to figure out its uses in the modern world. So, we aim to provide you a bit idea of real world use cases of the SDN.

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Source: Comparitech

Converged storage

Converged storage is an amalgam of computational resources and storage. This amalgam is carried out in a single unit.

Covered Storage is used as a development in storage centric, server centric or hybrid workloads. SDN is actively used by many famous data companies providing companies for storage and data center technologies. This is because of virtualization through which agility of storage is achieved.

For instance, Edgenet. They have implemented SDN Ecosystem that is programmable and is used for the creation of virtual systems. Switching is also done to ensure efficiency.

Video Apps

A communication and border control vendor, Sonus Networks, introduced the market with a new application for SDN in terms of videos. They collaborated Juniper (virtualization platform) with session border controllers and it allowed the perks of communications.

SDN ensures that quality of services (QoS) is maintained. This allows more control on the network and manage agreements of the businesses dynamically. These usages of SDN helps in improving the efficiency of the system.

Orchestration of services (Mobile Network)

The NVF and SDN have conquered the world of mobile networks. It is used more widely by the vendors for setting the networks and ensuring resource utiliziation and provisioning in the maximum way.

A remarkable advantage is that SDN and NFV can provision with much accuracy. Another reason for which companies are more inclined to choose SDN is that it can separate the application logic. It was very harder before SDN.

It is a common perception of all the companies using SDN that after SDN their overall cost has been decreased, the lead time is reduced and overall performance of the network has increased evidently.

Scalability of Data Center

SDN is also a big replacement of wired infrastructures used in data centers. There are some researches going on in some big universities at SDN switches which aims to test new horizons of networks.

The researchers are determined to find about the bandwidth of the SDN servers.

If used the hardware in data centers, it would be very costly hence software virtualization is a better option with less cost and more speed. The scalability of load balancing and bandwidth will be ensured too.

Usage in Enterprise

The basic usage of SDN is in enterprise. After experiencing better control, performance and efficiency the companies have switched to the SDN. SDN is a way to invite efficiency and sharpness to your company.

SDN will not be a bad choice for your company ever!

SDN is our future in terms of networking and technology. If you want to get benefitted by this latest technology Logic Finder will help you in that by training you with SDN course and its new linked technologies. So register yourself and get all the information from the link provided:

https://www.logicfinder.net/wp-content/uploads/2018/06/course-2.pdf

Review of Architecture of SDN

SDN is nothing but an architectural model that aims to provide flexibility and agility to networks. It allows quick response to dynamic changes in the services and businesses.

SDN Architecture

SDN architecture is a way to show how networking systems are built by open technologies and hardware which separates control plane and data plane.

SDN Planes

SDN has three architectural planes used for performing operations:

  1. Data Plane:

Frame or packet forwarding is handled by the data plane.

For instance, it handles:

  • Encapsulation.
  • De-capsulation.
  • Checking the MAC address table for determining exit interface.
  • Checking the IP routing table for determining exit interface.
  • Traffic filtering with access control lists (ACLs).
  • Encryption of traffic.
  1. Control Plane: 

The control plane is responsible for the control of the data plane. A switch’s MAC address table and a router’s IP routing table is populated by the control plane. Spanning Tree Protocol (STP), IP routing protocols and other protocols run on the control plane.

  1. Management Plane: 

The administrative tasks and access of a network device is handled by the management plane. For instance, connecting a router or switch by Telnet or Secure Shell session, is done by the management plane.

Also the Simple Network Management Protocol (SNMP) communication occurs by the management plane.

Distributed vs. Centralized Control Planes

If there exists a number of network devices, with own data planes, control planes, and management planes individually, we call them as distributed control plane.

To run the networks more efficiently, there are some SDN installations which allow to have a network controller, and movement of the control planes in the network controller.

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Distributed Control Plane

The network controller is further used for communication with the routers and switches. The communication takes place as a two-way communication. The network controller can communicate or send info to the routers and then get back information from those devices.

If the control plane resides on a centralized network controller, then it is referred to as a centralized control plane.

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Centralized Control Plane

 

To get to know about how this communication takes place and all the hidden facts of SDN, refer to Logic Finder’s SDN courses

https://www.logicfinder.net/wp-content/uploads/2018/06/course-2.pdf

Need of SDN for Cisco Professionals

Why SDN?

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Source: Lookingglass Cyber Solutions

SDN has been so much in hype since ages. But what is the reason? The reason is its adaption to dynamic environment. For Instance you want to run your own e-commerce business, and on that day you are going to announce a sale on your products. There will be a lot of traffic on your site and to handle that you run some VMs on site. Also, you need to adjust QoS policies. Now, as the sale is over you will have to move to the older configuration. You cannot change every single configuration through command line but need a centralized access to these changes. This is what SDN does.

Need of SDN for CISCO Professionals

For all engineers who fear of programming, let me tell you that programming is the future demand of Cisco professionals. This is because all Cisco devices will be controlled by softwares either they are switches or routers or anything else.

So, a basic knowledge of Python programming is necessary for all network engineers.

Logic Finder will help you in that regard. We have an excellently written book for network engineers in Python. Here is the link. https://www.logicfinder.net/wp-content/uploads/2018/06/course-1.pdf

You can register for the course or buy this book online.

You can also grab your hands on the course of SDN by Logic Finders. Here is its link

https://www.logicfinder.net/wp-content/uploads/2018/06/course-2.pdf

 

SDN VS NFV

NFV and SDN are two closely related technologies and are used hand to hand. Although used along but these two technologies are somewhat different.

SDN is a virtualization using networks and switches deployed automatically. SDN controllers and OpenFlow are the tools that provide this automation.

SDN can be thought of as server virtualization, for sticking together VMs. It can also involve NFV (not necessarily).

NFV moves services from hardware to the virtual environment. The services include load balancing, firewalls and intrusion detection. This is, indeed a big step ahead.

Caching and content control are easily transferable to a virtual environment, however this does not reduce costs of operation unless an intelligent system is derived. These intelligent properties are derived through NFV deployments like appliance deployments and quality of services.

An authentic example of this system is Application Delivery Controllers (ADCs) which spins servers on demand. However, in traditional hardware deployments the configuration is static.

Image result for SDN with NFV

Source: TechTarget

Working of SDN and NFV

With amalgam of SDN and NFV many useful things occur which helps in provisioning and management of virtual networks along with NFV. Traffic Loads are managed efficiently by SDN. ADCs can be provisioned if the load increases. It also helps in cloning and redeploying in developing environment.. NFV and SDN are worked and deployed together, forming a very powerful combination.

SDN and NFV were not in hype since 2014 but slowly the integration policies start to happen. However, the architecture of both SDN and NFV is still progressing with modern ways of deployments. SDN and NFV is in use since ages for big companies.

Both the technologies are the need of present times. To know about each of them Logic Finders will help you.

For further details please check this link below:

https://www.logicfinder.net/wp-content/uploads/2018/06/course-2.pdf

What is SDN and How It is Different From Traditional Networks?

SDN is a virtual technology using protocols like OpenFlow for controlling the network flow and switches and routers access. The interesting thing about SDN is that its architecture is varying from organization to organization so it is hard to draw a final line to its definition.

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Source: Comparitech.com

Whatever the definition is SDN is a way to virtualize the hardware. A software defined network is responsible for building a vast network by dividing them into two segments or planes.

The control plane is used for managing performance and faults of protocols like NetFlow, IPFIX and SNMP. The configuration of remote devices is also managed by SDN.

The other divided segment is the data plane that manages and forwards the traffic to destination. The control plane decides and watches the path to be taken before the traffic reaches to data plane. A flow protocol helps to complete this process. Here, the admin communicates with SDN and actual management of network takes place.

Scalability is the major feature of SDN and hence it was used initially by Google and Amazon. Then, it prevailed to other enterprises too due to immense benefits and cost effectiveness.

The network is expanded and new servers with much efficiency are introduced by SDN. SDN upscales the resources and increases efficiency. All big companies are now trying to adapt SDN for making their resources more efficient.

Difference between SDN and Traditional Networking?

The major difference that lies between SDN and other conventional network is that SDN is a software based network unlike others.

The infrastructure of traditional network is purely physical comprising switches and routers while software based infrastructure operates virtually by control planes. SDN is much easier as the user has to interact with the software rather than any physical gadget.

SDN can communicate more conveniently with gadgets as compared to physical infrastructures of conventional networks. The main difference that differentiates SDN from conventional network is the virtualization ability. An abstraction of physical network is formed by virtualization that helps in provisioning of resources.

The data plane guides the data flow in a traditional network which is located within routers or switches.

For SDN the control plane is a software entity. This ensures that traffic is controlled with much efficiency and care by centralized user interface. This provides more hold over the network. Also, the configuration settings of a network can be changed and managed remotely. This is a much cost effective approach.

SDN is now considered as the best alternative of traditional networks for their provisioning and bandwidth properties. It is more cost effective as there is no need to invest money in expensive infrastructures. However, a traditional network is always costly with a lot of investment.

You decide what is more convenient? Buying equipments? Or pressing buttons?

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