Method and apparatus for performing frame processing for a network

Inactive Publication Date: 2002-01-24
AVAYA MANAGEMENT LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One problem with conventional frame processing apparatuses, such as the conventional frame processing apparatus 100 illustrated in FIG. 1, is that the general purpose microprocessor is not able to process data frames at high speed.
As a result, the number of ports that the conventional frame processing apparatus can support is limited by the speed at which the general purpose microprocessor can perform the filtering operations.
The use of specialized microprocessors is an improvement but places additional burdens on the bandwidth requirements of the data paths.
Another problem with the conventional frame processing apparatus is that the

Method used

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  • Method and apparatus for performing frame processing for a network
  • Method and apparatus for performing frame processing for a network
  • Method and apparatus for performing frame processing for a network

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Experimental program
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Embodiment Construction

[0130]

3 Opcode Instruction Effect 00 halt # Stop processing until restart at next frame, optionally abort frame 01 jmp # jmp to immediate location 02 sti #,d1 store immediate to RxFIFO, variable ram or registers 03 or #,s mem[d] = mem[s] OR immediate, if only s specified, d=s 04 xor #,s mem[d] = mem[s] XOR immediate, if only s specified, d=s 05 and #,s mem[d] = mem[s] AND immediate, if only s specified, d=s 06 sub #,s, mem[d] = mem[s] - immediate, if only s specified, d =s 07 add #,s, mem[d] = mem[s] + immediate, if only s specified, d=s 08 cje #,s,pc compare mem[s] with immediate; jump to PC if result zero 09 cjne #,s,pc compare mem[s] with immediate; jump to PC if result non-zero 0A cjgte #,s,pc compare mem[s] with immediate; jump to PC if greater or equal 0B cjlt #,s,pc compare mem[s] with immediate; jump to PC if less than 0C subje #,s,pc mem[s] = (mem[s] - immediate); jump to PC if result non-zero 0D subjne #,s,pc mem[s] = (mem[s] - immediate); jump to PC if result zero 0E cjin...

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Abstract

An improved frame processing apparatus for a network that supports high speed frame processing is disclosed. The frame processing apparatus uses a combination of fixed hardware and programmable hardware to implement network processing, including frame processing and media access control (MAC) processing. Although generally applicable to frame processing for networks, the improved frame processing apparatus is particular suited for token-ring networks and ethernet networks. The invention can be implemented in numerous ways, including as an apparatus, an integrated circuit and network equipment.

Description

COPYRIGHT NOTICE[0001] A portion of the disclosure of this patent document contains material which is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all copyright rights whatsoever.[0002] 1. Field of the Invention[0003] The present invention relates to data communications networks and, more particularly, to switching data frames through data communications networks.[0004] 2. Description of the Related Art[0005] Frame processing is performed at nodes of networks, such as local area networks (LANs). By processing frames, the nodes are able to determine how to forward or switch frames to other nodes in the network.[0006] FIG. 1 is a block diagram of a conventional frame processing apparatus 100. The conventional frame processing apparatus 100 is suitable for use in a LAN, namely a t...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L29/06
CPCH04L49/90H04L69/12
Inventor NOLL, MICHAELSMALLWOOD, MARKCLARKE, MICHAEL
Owner AVAYA MANAGEMENT LP
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