关键词:  , 软件定义网络, 数据中心网络, 流量调度, 流量工程, 多商品流问题

Abstract:  In the data center network, multipath is widespread, but the traditional traffic scheduling method based on ECMP is likely to cause flow collision problem, therefore a new dynamic traffic scheduling method based on SDN is proposed. SDN has the advantages of centralized control, and global view of the network, so, it is used to schedule the elephant flow in network. In the scheme, firstly, the sFlow protocols is used to collect network information. Secondly the elephant flow path selection is modelled according to the multi-commodity flow problem. Last, we are trying to solve it by the particle swarm optimization to get the global optimal solution. Finally, the simulation results show that, the proposed algorithm can improve network utilization, achieve higher bisection bandwidth compared with the ECMP algorithm.

Key words:  Software Defined Network(SDN), data center network, traffic scheduling, traffic engineering, multi-commodity flow