WO2004045169A3 - Routing system and method for synchronizing - Google Patents

Routing system and method for synchronizing Download PDF

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Publication number
WO2004045169A3
WO2004045169A3 PCT/US2003/036099 US0336099W WO2004045169A3 WO 2004045169 A3 WO2004045169 A3 WO 2004045169A3 US 0336099 W US0336099 W US 0336099W WO 2004045169 A3 WO2004045169 A3 WO 2004045169A3
Authority
WO
WIPO (PCT)
Prior art keywords
routing
backup
processor
failure
prefix table
Prior art date
Application number
PCT/US2003/036099
Other languages
French (fr)
Other versions
WO2004045169A2 (en
Inventor
John Galen Scudder
David Delano Ward
Original Assignee
Cisco Tech Ind
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 Cisco Tech Ind filed Critical Cisco Tech Ind
Priority to CA002504825A priority Critical patent/CA2504825C/en
Priority to EP03768920A priority patent/EP1561313B1/en
Priority to AU2003291516A priority patent/AU2003291516A1/en
Priority to DE60309197T priority patent/DE60309197T2/en
Publication of WO2004045169A2 publication Critical patent/WO2004045169A2/en
Publication of WO2004045169A3 publication Critical patent/WO2004045169A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/02—Topology update or discovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/22—Alternate routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/54—Organization of routing tables
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/58—Association of routers
    • 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
    • G06F11/14—Error detection or correction of the data by redundancy in operation
    • G06F11/1402—Saving, restoring, recovering or retrying
    • G06F11/1471—Saving, restoring, recovering or retrying involving logging of persistent data for recovery
    • 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
    • G06F11/1658—Data re-synchronization of a redundant component, or initial sync of replacement, additional or spare unit

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Hardware Redundancy (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Circuits Of Receivers In General (AREA)
  • Synchronizing For Television (AREA)

Abstract

A routing system provides for transparent routing system failover by checkpointing route prefixes during normal operation by maintaining a route prefix table. After failure of a primary routing processor, routing with peer routing systems is synchronized through the use of this prefix table. The prefix table is managed by the primary routing processor and is accessible by a backup routing processor at least after failure of the primary routing processor. Upon the detection of a failure, a backup routing processor solicits routes from peer routing systems in response to the failure and generates a backup routing database from the routes received from peer routing systems. The backup routing processor also compares prefixes of routes in the backup routing database with prefixes in the prefix table, and sends route withdraw messages to the peer routing systems for routes having prefixes listed in the prefix table and not identified in the backup routing database.
PCT/US2003/036099 2002-11-12 2003-11-12 Routing system and method for synchronizing WO2004045169A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA002504825A CA2504825C (en) 2002-11-12 2003-11-12 Routing system and method for synchronizing
EP03768920A EP1561313B1 (en) 2002-11-12 2003-11-12 Routing system and method for synchronizing
AU2003291516A AU2003291516A1 (en) 2002-11-12 2003-11-12 Routing system and method for synchronizing
DE60309197T DE60309197T2 (en) 2002-11-12 2003-11-12 WAY SELECTION SYSTEM AND SYNCHRONIZATION METHOD THEREFOR

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/293,162 2002-11-12
US10/293,162 US7286468B2 (en) 2002-11-12 2002-11-12 Routing system and method for synchronizing a routing system with peers after failover

Publications (2)

Publication Number Publication Date
WO2004045169A2 WO2004045169A2 (en) 2004-05-27
WO2004045169A3 true WO2004045169A3 (en) 2004-08-12

Family

ID=32229615

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/036099 WO2004045169A2 (en) 2002-11-12 2003-11-12 Routing system and method for synchronizing

Country Status (8)

Country Link
US (1) US7286468B2 (en)
EP (2) EP1768331B1 (en)
CN (1) CN100456738C (en)
AT (2) ATE434884T1 (en)
AU (1) AU2003291516A1 (en)
CA (1) CA2504825C (en)
DE (2) DE60309197T2 (en)
WO (1) WO2004045169A2 (en)

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Also Published As

Publication number Publication date
EP1768331A1 (en) 2007-03-28
ATE343283T1 (en) 2006-11-15
DE60328137D1 (en) 2009-08-06
CN100456738C (en) 2009-01-28
ATE434884T1 (en) 2009-07-15
US20040090913A1 (en) 2004-05-13
AU2003291516A1 (en) 2004-06-03
EP1561313B1 (en) 2006-10-18
EP1768331B1 (en) 2009-06-24
CA2504825A1 (en) 2004-05-27
WO2004045169A2 (en) 2004-05-27
CN1711729A (en) 2005-12-21
DE60309197T2 (en) 2007-08-23
EP1561313A2 (en) 2005-08-10
DE60309197D1 (en) 2006-11-30
CA2504825C (en) 2008-07-22
US7286468B2 (en) 2007-10-23

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