Research on An Approach of ARP Flooding Suppression in Multi-Controller SDN Networks
Jinhua Du, Xianming Gao, Jingchao Wang, Shaohua Liu, Weipeng Cao, Yanbo Song, Shanqing Jiang · 2021
ARP flooding has become an urgent problem in the deployment and application of SDN networks, which has been only effectively solved in single controller SDN networks. But it still has ARP flooding and data synchronization problems in multi-controller SDN networks. So we propose a two-stage "storing-blocking" suppression algorithm to suppress ARP flooding in multi-controller SDN networks. It stores the ARP response messages as ARP suppression entries, and uses the strong consistency algorithm to synchronize ARP suppression entries among controllers. Once an ARP request message matches the ARP suppression entries the mechanism blocks the flooding of ARP request messages, which can achieve the goal of the suppression of ARP flooding. Our experimental results show that our proposed mechanism can effectively reduce the impact of ARP flooding in multi-controller SDN networks in terms of flooding time, flooding scope, and controller overhead.