Abstract: An IP address assigning method is provided. Firstly, an IP address request packet containing a media access control address is transmitted to a DHCP server. The IP address request packet is analyzed, so that the media access control address is acquired. Then, at least one address forwarding table of at least one network switch is acquired. Then, the address forwarding table is analyzed according to the media access control address, so that an assigned number of a port of the network switch is acquired. Then, a predetermined IP address listed in an IP address assigning table is assigned to the network device according to the assigned number of the port of the network switch. Afterwards, the media access control address and/or the assigned IP address is recorded in a field of the IP address assigning table corresponding to the assigned number of the port of the network switch.

Abstract: A management method for a cloud server for managing IP addresses hostnames, network topology mapping and task synchronization of cloud hosts. The cloud server assigns a temporary IP addresses to host for performing a system boot up and installation task upon a host starting to perform a system boot up and installation task. As the system boot up and the installation task at the host proceeds to a stage, the cloud server receives requests from hosts via a DNS inquiry instruction, and replying the mapping table of a hostnames and a fixed IP addresses to the host via a DNS answer.