Cloud Computing: In the WAN, it’s better to be single than attached

Grazed from NetworkWorld.  Author: Khalid Raza.

In a traditional WAN infrastructure, the control plane and data plane are tightly coupled, typically congruent, and cannot be separated due to how they are integrated with each network device. This architecture served the networking needs of enterprises well until now, since most data flows were structured around data centers with centralized exits.
 
However, the emergence of cloud computing and new dynamic business requirements that involve communicating with multiple partners and suppliers have forced enterprises to embrace new connectivity models. Today, enterprises need secure access to both partners and cloud provider infrastructures. This new model requires a different policy structure that is very difficult to instantiate and maintain within a legacy MPLS WAN...
 
The changing nature of enterprise networks demands the ability to add network capacity on-demand, create new service offerings, and concurrently attain real-time visibility into network and application performance. These requirements are best addressed with a new model suited to these challenges, rather than retrofitting existing technology intended for other purposes...

Read more from the source @ www.networkworld.com/article/3031172/software-defined-networking/in-the-wan-its-better-to-be-single-than-attached.html