A Survey On The Controller Placement Problem In SDN

Software-defined networking (SDN) is a technology that is emerging in today's world and it is mainly used for changing the state of the network by breaking the older version of it and by separating the network's control layer from the layer of the routers and switches. It also introduces the ability to program any network in any given situation and it is also promoting the logical centralization of the network control. SDN makes it easy to introduce and create new inventions in a networking system, simplifies the network management and makes net- work evolution easier. In SDN, the control plane and the data plane can be separated with the help of a well-defined programming interface between the SDN controllers and the switches. The Controller Placement Problem (CPP) is one of the most important tasks that have to be done in the Software Defined Networks. CPP affects all the desired aspects of a decoupled control plane, for example the option of state distribution, the fault tolerance capacity and also the performance metrics of a network. In latest researches, we will study about the introduction of a novel method named Garter Snake Optimization Capacitated Controller Placement Problem (GSOCCPP) to obtain the near-optimal minimal propagation delays in the Capacitated Controller Placement Problems.