MIXED PATH FOR ELEPHANT FLOW AND MICE FLOW FOR DELAY REDUCTION IN SDN

Software-Defined Networking is gaining popularity in industries as well as in the academic since its inception. Open flow is widely accepted southbound interface and is managed by Open Networking Foundation (ONF). Open flow uses the concept of backup path for packet transmission in the switches so that if primary path fails, it may use backup path without having to pass through controller so that path stability is maintained. But this leads to high miss rate in the lookup table of all the switches of the path in the network and thus adds extra overhead of miss penalty to all the switches in path (encapsulation of the packet and sending the packet to the controller through secure channel for further processing and controller sends the packet back to the switch). This adds extra latency to end delay. In this paper we proposed mixed path where elephant flow uses double (backup) path and mice flow uses single path so as to reduce miss rate in lookup table of the switches and path stability is maintained.