Setting the Flush TimeoutLECs can transmit unicast frames to the same destination LAN address through either the BUS or a data direct VCC at different times. To avoid the possibility that frames are sent out of order, because of the dual paths, a procedure known as the Flush Message Protocol is used. The flush protocol requires that the LEC transmit an LE_Flush_Request on the previously used path, before switching to the second path. An LE_Flush_Response must be returned to the sender by the destination client. When the LEC that originated the flush request receives the response, the old path is clear of data and the originating LEC begins using the new path. You can set the maximum amount of time that the LEC waits to receive an LE_Flush_Response after it sends a request. If this period of time is exceeded, the originating LEC begins using the new path. |