Fault Administration by Load Balancing in Distributed SDN Controller: A Review

Tremendous amount of data generated due to increasing no of users every day in the technology world. It is difficult to manage huge amount of discrete data with the traditional network. Even it is difficult to manage with technologies such as, big data, cloud computing in traditional network. Software Defined Networking (SDN) brings all the functionalities to a single location and making centralized decision. Controllers are the main entity of the SDN design, which governs decisions while routing packets. Centralized decision increases performance of the network. Distributed SDN controllers are physically distributed and logically centralized. Through this paper, we presented basics of distributed SDN controllers with its properties, studied classification of SDN controllers vide their logical design (hierarchical/flat model), programming language, adaptability, application domain etc. We categorize fault management issues in management plane, control plane and infrastructure plane and their interface. Paper will be concentrated on the faults generated through overloading of the controllers. As a solution switch migration technique will be derived. Provide detail discussion on prior work done in switch migration techniques for fault management through load balancing in distributed controllers. At last addition of fault management plane will be proposed in the SDN stack for generating robust distributed SDN controller.