SDN using ONOS controller

In today’s world, the need to manage and customize the networks outgrows the physical capabilities of today’s technology. There are an everlasting number of users. From here, we can see that the size of the content that needs to be delivered from one “place” to another is growing. Also, the demand that the user has is also growing. Since the invention of the smart phone, we have seen the rise of the Internet of Things era. Hence, the user now wants to be connected with everything, constantly. Examples of these are: “I want to be able to control and monitor the temperature of my apartment from my smart-watch”; or “I want to check the contents of my fridge from my smart-phone”. These kinds of services additionally add traffic to the already heavily loaded networks. This is a problem. Why? This is a problem because the physical capabilities of the enabling technology have become the bottleneck. The switches, routers, hubs and etc. have limitations that need time to be outgrown. This is why, in the last years, there is an intense research and work done regarding Software Defined Networks (SDN). In this paper, we will see the importance of a controller that has been developed from 2014 and is an SDN Controller. The ONOS Controller is used in a number of different scenarios, but here we will see only two use-cases. The first use case is “CORD: Leaf-Spine with Segment Routing”. The second use-case is “Packet-Optical Networks”. Both use-cases are managed by the ONOS Controller.