Load Balancing among Wide-Area SDN Controllers
Abhishek Kumar Singh, Mayank Tiwray, Raj Kumar, Rachita Misra · 2016
In Software Defined Network, the controller response time is the bottleneck for Quality of Service parameters for end users. This work aims at optimizing response time by a controller for an OpenFlow device (OFdevices) by selecting appropriate controller inWide Area Network environment. When the OFdevices select appropriate controller for minimization of the response time, they also stabilize the load on the physically distributed control plane. The proposed model checks for load imbalance in fixed time intervals for controllers and if a controller is overloaded then the proposed methods are called for migrating some of the OFdevices. The migration process affects QoS parameters for end user and therefore, this work focuses on improving end-users QoS while the OFdevice migrates. We evaluated our proposed work on Minimet and Floodlight controller. Simulation results shows that our proposed algorithms outperforms the existing works for load balancing.