Conclusion: Preparing the modern business for Cloud requires a common computing and networking infrastructure with new Cloud architectures converging with data centres over a hybrid of both direct Cloud connections and traditional wide area networking.
Organisations must begin by conducting a “triage” of their applications into three networking categories: those in pure public Cloud deployment; a hybrid of public and private (“on-premises”) computing; and those that will never go to Cloud (such as legacy apps, or for regulatory or security requirements).
At Cloud-scale the network becomes a fabric that facilitates software-defined technologies1 (compute virtualisation, SD Storage, SD Networking and SD Security). Software-defined networking (SDN) abstracts network functions so that existing switches, routers and appliances can be made programmable to enhance their functions and reduce costs.
Eventually business IT processing will be delivered by SD Everything as all fundamental IT functions coalesce.
From today, businesses should be placing new emphasis on the “management” of their networking as both “virtual” and physical networks and plan to drastically reduce manual configuration and operation of networked IT as indicated below.