PACKET TRANSFER PROCESSING APPARATUS AND METHOD

摘要

A write preference determination unit (30A) compares a reception rate of packets received from the lines of a first network (NW1) with a reception rate threshold for write preference determination, and in a case where the reception rate exceeds the reception rate threshold, determines that preference of a write operation is necessary. A write preference control unit (30B) increases, out of a total access bandwidth of a packet buffer (BUF), a write bandwidth for a packet write operation to the packet buffer (BUF) as compared to a read bandwidth for a packet read operation from the packet buffer (BUF) in a case where the write preference determination unit (30A) determines that the preference is necessary, thereby preferentially executing the packet write operation to the packet buffer. This suppresses occurrence of linked discard of reception packets caused by a shortage of the write bandwidth.

主权项

1. A packet transfer processing apparatus that concentrates a plurality of lines from a first network and connects the lines to a second network, characterized by comprising:
register files equipped for each of the lines and configured to hold packets received from the respective lines; a selector configured to sequentially selectively output one of the packets read out of said register files; a data write unit configured to write the packet selectively output from said selector in a packet buffer; a data read unit configured to transmit a packet read out of the packet buffer to the second network; a write preference determination unit configured to compare a reception rate of packets received from the lines with a reception rate threshold for write preference determination, and in a case where the reception rate exceeds the reception rate threshold, determine that preference of a write operation is necessary; and a write preference control unit configured to increase, out of a total access bandwidth of the packet buffer, a write bandwidth for a packet write operation to the packet buffer as compared to a read bandwidth for a packet read operation from the packet buffer in a case where said write preference determination unit determines that the preference is necessary, thereby preferentially executing the packet write operation to the packet buffer.