Patent ID: 8625585

Claim:
A switch apparatus comprising: a first switch circuit to receive frame data sent from a first device, to send first frame data created based on the received frame data and including the received frame data, and to send second frame data created based on the received frame data and including the received frame data after a predetermined time period elapses from sending of the first frame data; a first controller to output the first frame data received from the first switch circuit; a second controller to output the second frame data received from the first switch circuit; and a second switch circuit to: receive the first frame data from the first controller and second frame data received from the second controller, determine whether each of the first frame data created and the second frame data created has an error, send the received frame data in the first data to a second device when determining that the first frame data created is free from an error, send the received frame data in the second frame data-to the second device when determining that the first frame data created has an error and when determining that the second frame data created is free from an error, and prevent sending of the second frame data to the second device when the received frame data in the first frame data is sent to the second device.