A multi-port packet retransmission method and device based on a shared buffer

Abstract

The present disclosure relates to the technical field of message transmission, and provides a multi-port message retransmission method and device based on a shared buffer area. The method comprises: receiving an initial message sent by an upstream module, adding a local message identifier to a message reservation field of the initial message to form a candidate message; sending the candidate message to a downstream port and backing up the candidate message to a logical storage space in a retransmission buffer area, the physical storage space of the retransmission buffer area being shared by a plurality of downstream ports; taking the local message identifier as an index to record the logical storage address of the candidate message in the logical storage space to a retransmission address management module; receiving retransmission indication information fed back by the downstream port for the candidate message; and determining a target message in the logical storage space according to the retransmission indication information, and performing data retransmission or data release on the target message. The technical scheme provided by one or more embodiments of the present disclosure can effectively save the buffer device resources used for message retransmission.