Sometimes network resources including IP address, MAC address, and hostname could be misused for the weakness of TCP/IP protocol suite and the deficiency of network management. Therefore, there is urgent need to solve the problems from the viewpoint of network management and operation. In this paper, we propose a network network blocking algorithm based on ARP spoofing and evaluate the robustness of this algorithm via various experiments. We have performed several experiments on the gratuitous ARP exchange and IP address conflict detection in order to identify the robustness of the network blocking algorithm under both homogeneous and heterogeneous operating system.