Method and apparatus for input/output link retry, failure and recovery in a computer network

From a source (3) node data transmission to a target (4) node method, comprising an intermediate part and packet serial number. Copy of the packet is received till receiving which is a source node's buffer associated a data of middle part success receiving. The intermediate joint assigns an intermediate joint are connected to the packets, and a copy of the packet are retained in a buffer till holding the multipoint to receiving a data from the second transmission. Once packets in buffer is received successfully; the packet is released. The receiving and an indicating; each packet flowing of the retransmission. The receiving end, follows, packet of the is received from indication and related packet is discarded, wherein the packet successfully of the retransmission thereof. A single prevention indicates confirmation with the prevention and data packet includes at least two, and at indicated correctly is received at the formerly packet of the prevention and data packet is received. Front controller, a disconnecting link serial number of assigned to each packet.