IEEE COMMUNICATION SURVEYS & TUTORIALS, VOL. 16, NO. 4, FOURTH QUARTER 2014
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A Survey on Software-Defined Network and
OpenFlow: From Concept to Implementation
Fei Hu, Qi Hao, and Ke Bao
Abstract—Software-defined network (SDN) has become one of
the most important architectures for the management of large-
scale complex networks, which may require repolicing or recon-
figurations from time to time. SDN achieves easy repolicing by
decoupling the control plane from data plane. Thus, the network
routers/switches just simply forward packets by following the flow
table rules set by the control plane. Currently, OpenFlow is the
most popular SDN protocol/standard and has a set of design
specifications. Although SDN/OpenFlow is a relatively new area,