Unicast, multicast, and broadcast method and apparatus

Details Unicast, multicast, and broadcast method and apparatus Unicast, multicast, and broadcast method and apparatus

1997-09-11

2000-09-05

Vu, Huy D.

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370401, 370409, H04L 1256

Patent

active

061153796

ABSTRACT:
At least a portion of the data units in a bridge/router are processed by logic circuits according to cast type. The cast type, source address and destination address of an incoming data unit are determined by examining the header. For a unicast data unit, the source address and destination address are employed to obtain a transmit port indicator from memory, and the unicast data unit is directed to the port indicated by the transmit port indicator. For a non-unicast data unit, the source address and destination address are employed to obtain a first port mask that indicates valid ports for receipt of the data unit and a second port mask that indicates valid ports for transmission of the data unit from memory. The first and second port masks are combined to generate a third port mask, and the non-unicast data unit is directed to the ports indicated by the third port mask.

REFERENCES:
patent: 5963556 (1999-10-01), Varghese et al.
patent: 5982775 (1999-11-01), Brunner et al.
patent: 5991297 (1999-11-01), Palnati et al.
patent: 6014380 (2000-01-01), Hendel et al.

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