A method and apparatus for dynamically modifying routing information in an interconnect architecture without quiescence is herein described. This system includes an identification unit which executes parameter identification processing to determine a transfer function of the FF controller as well as a control operation. The communication control station performs a transfer switching process concerning the authenticated terminal based on the transfer switching request outputted from the first terminal. The variation distribution value and a variation distribution error standard are compared to determine whether the variation distribution value is smaller than the error standard.