An information processing apparatus (PDEV), comprising: a physical layer device configured to distribute data to a plurality of physical coding sublayer lanes and to perform data transfer to and from an external device by using a plurality of physical lanes each of which has a number of the physical coding sublayer lanes; and a transfer circuit configured to transfer data output by a central processing unit performing arithmetic processing to the physical layer device, and to transfer data from the physical layer to the central processing unit, the transfer circuit that comprises: an information acquisition unit configured to receive, from the physical layer device, detection information of the individual physical coding sublayer lanes which detection information indicates whether or not an alignment marker has been detected in all the PCS lanes before a predetermined period of time elapses after an initial alignment marker is detected, and error information of the physical coding sublayer lanes which indicates that the data transferred to the physical layer device from the external device has an error, from the physical layer device, and a selection unit configured to specify a physical lane to be degenerated based on one of the error information and the detection information when a failure occurs in one of the plurality of physical coding sublayer lanes, and to select a physical lane to be used for data transfer to and from the external device from the physical lanes except for the specified physical lane. a physical layer device configured to distribute data to a plurality of physical coding sublayer lanes and to perform data transfer to and from an external device by using a plurality of physical lanes each of which has a number of the physical coding sublayer lanes; and a transfer circuit configured to transfer data output by a central processing unit performing arithmetic processing to the physical layer device, and to transfer data from the physical layer to the central processing unit, the transfer circuit that comprises: an information acquisition unit configured to receive, from the physical layer device, detection information of the individual physical coding sublayer lanes which detection information indicates whether or not an alignment marker has been detected in all the PCS lanes before a predetermined period of time elapses after an initial alignment marker is detected, and error information of the physical coding sublayer lanes which indicates that the data transferred to the physical layer device from the external device has an error, from the physical layer device, and a selection unit configured to specify a physical lane to be degenerated based on one of the error information and the detection information when a failure occurs in one of the plurality of physical coding sublayer lanes, and to select a physical lane to be used for data transfer to and from the external device from the physical lanes except for the specified physical lane. an information acquisition unit configured to receive, from the physical layer device, detection information of the individual physical coding sublayer lanes which detection information indicates whether or not an alignment marker has been detected in all the PCS lanes before a predetermined period of time elapses after an initial alignment marker is detected, and error information of the physical coding sublayer lanes which indicates that the data transferred to the physical layer device from the external device has an error, from the physical layer device, and a selection unit configured to specify a physical lane to be degenerated based on one of the error information and the detection information when a failure occurs in one of the plurality of physical coding sublayer lanes, and to select a physical lane to be used for data transfer to and from the external device from the physical lanes except for the specified physical lane.