A method for managing communication between nodes in a virtual network is provided. A first computing system utilizes first information to forward first data to the second computing system in a physical network. If the first information is incorrect, the second computing system forwards an unlearning request to the first computing system, and the first computing system updates or deletes the first information. If the first information is not available, the first computing system forwards the first data to a group of computing systems in the physical network by way of a multicast service. Upon receiving the first data, the second computing system or a third computing system in the physical network forwards a learning request to the first computing system, and the first computing system utilizes the learning request to generate the first information.