High speed header translation processing

Details High speed header translation processing High speed header translation processing

1997-09-11

1999-11-23

Patel, Ajit

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370389, 370401, H04L 1228

Patent

active

059912995

ABSTRACT:
A method and apparatus is disclosed for translating data link layer and network layer frame headers at speeds approximating the reception rate of frames on respective communication links. High-speed header translation is achieved via the use of a dedicated microsequencer which identifies the receive frame encapsulation type and the transmit frame encapsulation type and based on such identification, selects a processing routine which is then executed to translate the frame header. The microsequencer is employed to control the movement of control information and frame header and payload information from an input FIFO, through the dedicated header processor, and to an output FIFO. The headers of the respective frames are translated within the dedicated header processor to facilitate header translation at high speeds. Via use of the presently disclosed header translation apparatus, layer 2 and layer 3 header translations, as well as other header translation functions may be rapidly performed.

REFERENCES:
patent: 5077732 (1991-12-01), Fischer
patent: 5428615 (1995-06-01), Backes
patent: 5651002 (1997-07-01), Van Seters
patent: 5729543 (1998-03-01), Weigand
patent: 5732081 (1998-03-01), Grenot
patent: 5825774 (1998-10-01), Ready et al.

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