公开(公告)号：CA2144402A1

公开(公告)日：1995-10-15

申请号：CA2144402

申请日：1995-03-10

Applicant: IBM

Inventor： LEBIZAY GERALD ,  MUNIER JEAN M ,  PAUPORTE ANDRE ,  SPAGNOL VICTOR

IPC: H04L12/56

Abstract: The present invention relates to an efficient point-to-point and multi-points routing system and method for programmable data communication adapters in packetswitching nodes of high speed networks. The general principles of this efficiency are as follows. First, data packets are never copied, only packet pointers are copied for each destination, Space in Buffer Memory is saved, the number of instructions is significantly reduced improving the packet throughput (number of packets per seconds that the adapter is able to transmit). and the routing is independent of the packets length. Second, no overhead is generated by the multi-points mechanism in the real time procedures, the underrun/overrun problems on the outputs are reduced and the efficiency of the adapter in term data throughput (bits per second) is significantly improved. Third, each output is processed independently by means of interrupts, lines are managed in real time and lines of different speed or protocol can be supported in parallel. Fourth, the release of the resources is entirely realized on a non priority mode.