Research on the SDN Consistency Problems of the Control Logic Based on Network Delay

This paper studies the transitional state in the software defined networking (SDN) networks during the SDN network update process. A route optimization scheme is proposed after the brief review of the logic inconsistency issues in SDN networks due to the delay in the network. In this scheme, the timing sequence of the control rules is tuned adaptively on the control plane so as to ensure that the control logic in the whole network is consistent. In addition, an objective optimization model based on the average network latency of nodes is constructed. With this model, we find the minimum-delay route while retaining the logic consistency in the SDN network. The simulation results demonstrate that the proposed scheme is feasible and effective.