Patent ID: 8725863

Claim:
A method for obtaining an external IP address suitable to be used in a rack system, the method for obtaining an external IP address comprising steps of: detecting a jumper of a rack management controller to obtain an identification code when a Dynamic Host Configuration Protocol (DHCP) service being lost in the rack system; reading a first table; obtaining a first temporary IP address of the rack management controller as a first external IP address based on the identification code and the first table; setting an external LAN based on the first temporary IP address; sending a first command package including a temporary IP address set to a power distribution unit by the rack management controller based on a second table stored in the rack management controller; and after the first command package being received by the power distribution unit, activating an IP assign service to set a second temporary IP address of a node server as a second external IP address, wherein the temporary IP address set including the second temporary IP address is provided by the second table.