Patent ID: 7047290

Claim:
A computer system comprising: at least one upper node device each having at least one connection port; an information exchanger connected to the connection port for controlling packet transfer; and a storage controller connected to the information exchanger for passing a packet via the information exchanger with the upper node device, wherein the storage controller has a control table containing identification information of the upper node device, identification information of the connection port and security information of the connection port, and when connection status of an input/output port was changed in the upper node device, replacement of the connection port is detected by the storage controller on the basis of information notified from the information exchanger, and in the control table, the identification information of the connection port before replacement is replaced with identification information of the connection port after the replacement, and in case that the security information of the connection port before replacement was access enabled, security information of the connection port after replacement is set to be access enabled in the control table, and for a newly added input/output port, identification information of corresponding upper node device, identification information of the newly added input/output port and security information in which access disabled is set are registered in the control table; and wherein said security information is added to the port name information so as to constitute the fiber channel port configuration information of the upper node device.