Despite the benefits of Software Defined Networking, the technology also introduces new challenges including addressing dynamic real-time change, accommodating rapid on-demand growth, and integrating service context.
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The challenge to moving to SDN is really not so much technical as it is organizational. It means a different way of doing things, and not just doing forwarding and routing, but doing network operations, network management, network monitoring and application development. It also will involve a change in the roles, responsibilities and the talents of staff.
The challenges that are happening for people that move to SDN, is that you have this silent approach, where you have this Cisco expert, or networking expert and then you have the security expert and then you have the application and you have your server expert. Then, obviously when there is a problem or you're deploying something you all have to get together. The skill set, that is what the world is today. Now SDN all of these rules will merge in terms of you have the application person, that's obviously still there, he'll probably doesn't need to know the network, because that is what SDN provides, it basically abstracts the network and allows you to have this programming layer where your application requests from the infrastructure certain connectivity and it just happens. You don't have to worry about I have a switch here or a router there. SDN doesn't eliminate that networking expert or security, it just gives them a tool, a better tool to apply their skill set.
As the need for the specialized knowledge decreases doesn't mean that the skill sets that may be required can't be applied to different types of problems. The problems going to move, the nature of the problem isn't going to change as much. They're still trying to deliver a network service, but rather than focusing on the hardware capabilities as a singular thing, they will be focused more on what are the software capabilities that are required there.