Load Balancing Approach for Finding Best Path in SDN

摘要

Software Defined Networking (SDN) is a new network model, and it eliminates the current limits of network facilities. SDN has the advantage of taking global view of overall network. In large networks, a single server is often unable to handle client requests with the fast growth of internet users and applications. Our network should be able to cope with large volume of traffic without introducing unnecessary delay. One solution to this problem is load balancing for network scalability and service availability. Load Balancer is a device that distributes the traffic among number of servers. But traditional vendor specific Load Balancer is a device that is much more expensive. Internet user can not change the functionality of that device i.e. Traditional Load Balancer are non-programmable. In a network single Load Balancer becomes a single point of failure or sometimes in large network it becomes bottleneck. Software defined networking is a promising solution to all these disadvantages. SDN improved the performance of transmission using six features like bandwidth ratio, hop count, latency, packet overhead, trust and packet loss. Find load on each node using this feature. Select least loaded path for transmission as a new incoming data flow in a real time.