Definition: SDN: Software Defined Networks
“SDN Complexity and Reality” by Russ White and Shawn Zandi, was published on page 31 of The Internet Protocol Journal, November 2016 (Volume 19, Number 3). You can download ipj19-3.pdf at http://ipj.dreamhosters.com/.
In the article, White and Zandi, examine the original three crucial elements to the SDN story:
First, SDNs were supposed to remove the intelligence from the distributed control planes and consolidate that intelligence in a centralized controller.
Second, SDNs were supposed to provide a more granular level of control – down to the flow level.
Third, SDNs would enable the network to be programmable…