Study of Buffer Management of Input-Buffered Switches
Qian Hua-lin · Microelectronics & Computer · 2003
The VOQ switch can forward traffic at line rate without internal speedup while eliminating HOL blocking in single FIFO queueing switches, so it has recently received increasing attention of many designers and is considered as the best solution for high performance switches. The function of buffers in switches is to store the packets or cells temporarily which can not be forwarded to the output links due to resource contention. The fashion of buffer organization and management has direct influence on switches performance. In this paper, we compared effects of various buffer management schemes on the performance of input buffered switches with finite buffer capacity by simulations. The results show that the performance indexes, such as throughput, delay, packet lost ratio, have inconsistent requirements for buffer with each other and tradeoff is necessary in resource management.