Abstract
Distributed control plane architecture in SDN solves the problem of single point of failure. However, it does not protect the network from security attacks. Therefore, we investigate SDN with multiple controllers' attacks using Stochastic Petri Net. We identify attacker actions and model the attacker scenarios against the control plane. We analyze the developed SPN attack graph and study the uncertainty of the attacker such as the number of attackers in the network and attacker rates.