Is it rare for me to see, or is it a recent buzzword? Don't get me wrong, I certainly don't know that the IT industry is crazy at the speed of innovation, but it seems that the current technology evolution is faster than ever, and fundamental changes are taking place. We can attribute it to one thing: the cloud. Cloud computing is by no means new, but it has been very active since 2014.
From software to hardware, cloud computing is changing the way data centers deploy, develop, and consume everything. It is rapidly and thoroughly disrupting the way companies deliver products and services to their customers.
Let's take a brief look at the next few popular techniques and discuss why you will eventually adopt them.
Software Defined Network (SDN) - What exactly is it?
The definition of SDN is endless, mainly because it is a relatively new technology and has different meanings for different vendors. Before the market matures, the confusing situation will continue for at least some time. SDN separates the system (control plane) from which the traffic is sent to the underlying system (data plane) that forwards traffic to the selected destination. Investors and vendors of these systems believe that this can simplify the network1. Through the controller, the network administrator can quickly and easily determine how the underlying systems (switches, routers) located in the forwarding plane control traffic.
SDN requires some way for the control plane to communicate with the data plane. OpenFlow is such a mechanism, people often mistake it for SDN, but other mechanisms also conform to the corresponding concept.
By separating the control plane from the forwarding plane, the data center can reduce costs and provide better agility. Who wouldn't want this? This is achieved in the following ways:
1. Reduce reliance on expensive dedicated ASIC network hardware and related pay-as-you-go models that often lead to over-provisioning. In other words, you can get more value from your own network.
2. SDN provides greater programmability, making network expansion, system design and management easier.
3. Agility and flexibility. Everyone needs it, wants to get good agility and flexibility, and SDN can have both. SDN enables organizations to quickly deploy new infrastructure, applications, and servers much faster than traditional networks.
OpenFlow
People often mix OpenFlow and SDN, but they are not the same. OpenFlow is just a component of the entire SDN architecture and is an open standard for implementing a communication protocol that enables the control plane to interact with the forwarding plane. As an open standard, it is controlled by the OpenFlow ConsorTIum. OpenFlow is not the only SDN-oriented protocol that is currently available (or under development). The open source network OS (ie ONOS) led by The Open Networking Lab (ON.Lab) is another option.
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