Packet preprocessing interface for multiprocessor network...

Details Packet preprocessing interface for multiprocessor network... Packet preprocessing interface for multiprocessor network...

2005-06-07

2005-06-07

Phan, Man U. (Department: 2665)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S412000, C709S250000

Reexamination Certificate

active

06904040

ABSTRACT:
A network handler uses a DMA device to assign packets to network processors in accordance with a mapping function which classifies packets based on its content, e.g., bits in one or more header fields. Preferably, the mapping function is implemented as a hash function, which uses a predetermined number of bits from packet as inputs. The result of this function specifies the processor to which the packet is assigned. To make implementation manageable in a high-traffic environment, each processor may be equipped with a queue, which holds pointer information. Such a pointer provides an indication of the area in memory where incoming packet resides. The network handler is particularly useful in a Fiber Channel environment, where the hash function may be implemented to assign all packets from the same sequence to the same processor, thereby resulting in improved processing efficiency.

REFERENCES:
patent: 5938736 (1999-08-01), Muller et al.
patent: 6449251 (2002-09-01), Awadallah et al.
patent: 6625654 (2003-09-01), Wolrich et al.
patent: 6631422 (2003-10-01), Althaus et al.

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