أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
in simpler diffention out of my mind; SDN is a Software to manage the network from a single console whatever how many or kind of the Appliance vendors you have, and manage it down to a deep low level of functionality and configuration through a protocl called OpenFlow "unlike SNMP or any other protocol".
and for why they care about it; in my humble opinion all vendors are care about because they saw that the market is going toward multi vendor "Hyprid Network" and the other important point is the great cabapilities for SDN to integrate with Cloud Software which is the new Era in networks.
Software-defined networking (SDN) is an approach to networking in which control is decoupled from hardware and given to a software application called a controller.
When a packet arrives at a switch in a conventional network, rules built into the switch's proprietary firmware tell the switch where to forward the packet. The switch sends every packet going to the same destination along the same path -- and treats all the packets the exact same way. In the enterprise, smart switches designed with application-specific integrated circuits (ASICs) are sophisticated enough to recognize different types of packets and treat them differently, but such switches can be quite expensive.
