Hi Stephen,

Nice post Looks for me "HPs view of SDN", Potential used case for SDN would be lower cost to keep operating networking devices.

Intelligent networks provide best out of them during uncertainty caused by (Active path failover, Fast convergence during link failures, line card failures and hundreds of used cases),for this to happen every networking device needs to be intelligent and program themself during uncertainty, todays networking devices do this at every node and they keep evolving.

SDNs changes networking concept by centralising network information and programing all nodes via controller and this results effectively lower cost of devices said by SDN gurus. Does SDN based used cases can handle uncertainty as traditional devices do?