A method includes a second system that determines a type of a first management Internet Protocol (IP) address, and sends, to a first system, first information used to indicate the type of the first management IP address; the first system determines the first management IP address based on the type of the first management IP address indicated by the first information, and releases a first correspondence between system identification information and the first management IP address to an advertisement system; the advertisement system sends the first correspondence to a network management system; and the network management system manages the first system based on the first correspondence.