Big Flow Collision Avoidance Strategy for Load Balancing in SDN

Software definition network (SDN) as a new model of the future network architecture system, which gains the academic and industry attention. Large traffic often leads to congestion and transmission of network links. Equal-Cost Multi-Path (ECMP) routing can play a significant role in balancing the load, but it cannot solve two or more large and long cycle of flow through the pseudo-random algorithm to select the same link forwarding collision. Then, we propose a big flow collision avoidance strategy for load balancing (BFCAS) to handle the collision of the huge flow, the default basic ECMP to handle the tiny flow. Finally, the SDN of the Fat-Tree topology is deployed, and the effect of BFCAS collision avoidance and the scalability are analyzed experimentally.