CA2117619A1 - Method and Apparatus for Fault Tolerant Connection of a Computing System to Local Area Networks - Google Patents

Method and Apparatus for Fault Tolerant Connection of a Computing System to Local Area Networks

Info

Publication number
CA2117619A1
CA2117619A1 CA2117619A CA2117619A CA2117619A1 CA 2117619 A1 CA2117619 A1 CA 2117619A1 CA 2117619 A CA2117619 A CA 2117619A CA 2117619 A CA2117619 A CA 2117619A CA 2117619 A1 CA2117619 A1 CA 2117619A1
Authority
CA
Canada
Prior art keywords
network
computing system
pair
local area
area networks
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2117619A
Other languages
French (fr)
Other versions
CA2117619C (en
Inventor
Kevin J. Rowett
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tandem Computers Inc
Original Assignee
Tandem Computers Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tandem Computers Inc filed Critical Tandem Computers Inc
Publication of CA2117619A1 publication Critical patent/CA2117619A1/en
Application granted granted Critical
Publication of CA2117619C publication Critical patent/CA2117619C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/2002—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where interconnections or communication control functionality are redundant
    • G06F11/2005—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where interconnections or communication control functionality are redundant using redundant communication controllers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/2002—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where interconnections or communication control functionality are redundant
    • G06F11/2007—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where interconnections or communication control functionality are redundant using redundant communication media
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/202—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant
    • G06F11/2046—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant where the redundant components share persistent storage
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/2017—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where memory access, memory control or I/O control functionality is redundant
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/202—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant
    • G06F11/2038—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant with a single idle spare processing component
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/2097—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements maintaining the standby controller/processing unit updated

Abstract

A computing system, having an input/output bus for communicating data thereon, is connected to a network by a pair of network controller devices. Each of the network controller devices, in turn, connect to a corresponding one of a pair of multi-ported network repeater elements which are, in turn, connected to one another by a pair of network links. At least one workstation is connected to each of the network repeaters. One of the network controllers is initially selected as a primary data communicating path from the computing system to the network. The network controllers periodically transmit messages to one another, and if receipt of those messages by the primary network controller is noted, the selection of the primary controller will be switched to the other.
CA002117619A 1993-10-15 1994-09-01 Method and apparatus for fault tolerant connection of a computing system to local area networks Expired - Fee Related CA2117619C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/137,436 1993-10-15
US08/137,436 US5448723A (en) 1993-10-15 1993-10-15 Method and apparatus for fault tolerant connection of a computing system to local area networks

Publications (2)

Publication Number Publication Date
CA2117619A1 true CA2117619A1 (en) 1995-04-16
CA2117619C CA2117619C (en) 1999-05-11

Family

ID=22477427

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002117619A Expired - Fee Related CA2117619C (en) 1993-10-15 1994-09-01 Method and apparatus for fault tolerant connection of a computing system to local area networks

Country Status (6)

Country Link
US (1) US5448723A (en)
EP (1) EP0649092B1 (en)
JP (1) JP2583023B2 (en)
AU (1) AU685497B2 (en)
CA (1) CA2117619C (en)
DE (1) DE69414219T2 (en)

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Also Published As

Publication number Publication date
EP0649092B1 (en) 1998-10-28
CA2117619C (en) 1999-05-11
AU685497B2 (en) 1998-01-22
JPH07235933A (en) 1995-09-05
DE69414219T2 (en) 1999-04-22
DE69414219D1 (en) 1998-12-03
US5448723A (en) 1995-09-05
JP2583023B2 (en) 1997-02-19
EP0649092A1 (en) 1995-04-19
AU7581694A (en) 1995-05-04

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