基于网络时延的SDN逻辑一致性策略研究

对SDN网络更新过程中的暂时中间态进行了研究, 阐述了因网络时延导致的控制逻辑不一致问题, 并提出了一种解决方案. 该方案通过在控制平面上调整安装控制规则的时序, 使网络达到控制逻辑一致的目的, 进一步建立了一种基于节点平均网络时延的目标优化模型, 通过对模型求解得到SDN网络逻辑一致的时延最小路由路径. 最后通过仿真实验验证了该方案的可行性和有效性.

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.