Network switch with separate cut-through buffer

Details Network switch with separate cut-through buffer Network switch with separate cut-through buffer

1996-12-30

2000-07-25

Ngo, Ricky Q.

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370423, 370429, H04L 1256, H04L 1266

Patent

active

06094434&

ABSTRACT:
A network switch including a separate cut-through buffer for facilitating cut-through mode of data transfer. The switch further includes a data bus coupled to each of the ports, a memory and a switch manager coupled to the data bus and to the memory for controlling data flow. The switch manager includes a receive buffer for handling data received by the switch, a transmit buffer for handling data to be transmitted by the switch, and a separate cut-through buffer for receiving data at any of the ports and for buffering the data to another one of the ports during cut-through mode of operation. The switch manager includes status memory, which includes programmable receive and transmit mode values for each of the ports, the modes selecting between cut-through and store-and-forward mode of operation for an indicated direction for each port. Control logic operates source and destination ports in cut-through mode if the receive mode value of the source port and the transmit mode value of the destination port have both been programmed to select cut-through mode.

REFERENCES:
patent: 5546385 (1996-08-01), Caspi et al.
patent: 5737635 (1998-04-01), Daines et al.
patent: 5764895 (1998-06-01), Chung
patent: 5781549 (1998-07-01), Dai

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