WO2001043370A3 - Method and apparatus for longest match address lookup - Google Patents

Method and apparatus for longest match address lookup Download PDF

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Publication number
WO2001043370A3
WO2001043370A3 PCT/CA2000/001442 CA0001442W WO0143370A3 WO 2001043370 A3 WO2001043370 A3 WO 2001043370A3 CA 0001442 W CA0001442 W CA 0001442W WO 0143370 A3 WO0143370 A3 WO 0143370A3
Authority
WO
WIPO (PCT)
Prior art keywords
address lookup
longest match
match address
lookup table
key
Prior art date
Application number
PCT/CA2000/001442
Other languages
French (fr)
Other versions
WO2001043370A2 (en
Inventor
David A Brown
Original Assignee
Mosaid Technologies Inc
David A Brown
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 Mosaid Technologies Inc, David A Brown filed Critical Mosaid Technologies Inc
Priority to CA 2393760 priority Critical patent/CA2393760C/en
Priority to AU23341/01A priority patent/AU2334101A/en
Priority to GB0213390A priority patent/GB2374174B/en
Priority to EP20000986911 priority patent/EP1250779A2/en
Priority to JP2001542955A priority patent/JP2003516666A/en
Priority to DE2000185388 priority patent/DE10085388T1/en
Publication of WO2001043370A2 publication Critical patent/WO2001043370A2/en
Publication of WO2001043370A3 publication Critical patent/WO2001043370A3/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
    • H04L45/74—Address processing for routing
    • H04L45/742—Route cache; Operation thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/90—Details of database functions independent of the retrieved data types
    • G06F16/901—Indexing; Data structures therefor; Storage structures
    • G06F16/9017—Indexing; Data structures therefor; Storage structures using directory or table look-up
    • G06F16/902—Indexing; Data structures therefor; Storage structures using directory or table look-up using more than one table in sequence, i.e. systems with three or more layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C15/00—Digital stores in which information comprising one or more characteristic parts is written into the store and in which information is read-out by searching for one or more of these characteristic parts, i.e. associative or content-addressed stores
    • 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
    • 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
    • H04L45/02—Topology update or discovery
    • H04L45/04—Interdomain routing, e.g. hierarchical 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
    • H04L45/74—Address processing for routing
    • H04L45/745—Address table lookup; Address filtering
    • H04L45/7453—Address table lookup; Address filtering using hashing
    • 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
    • H04L45/74—Address processing for routing
    • H04L45/745—Address table lookup; Address filtering
    • H04L45/74591—Address table lookup; Address filtering using content-addressable memories [CAM]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99931—Database or file accessing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99931—Database or file accessing
    • Y10S707/99933—Query processing, i.e. searching
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99941—Database schema or data structure
    • Y10S707/99943—Generating database or data structure, e.g. via user interface

Abstract

We present a lookup table for providing a longest prefix match for a key provided in a search request. The search key is provided in a single search request issued to the lookup table. The lookup table performs a multi-level search for the result value based on successive portions of the key.
PCT/CA2000/001442 1999-12-10 2000-12-08 Method and apparatus for longest match address lookup WO2001043370A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA 2393760 CA2393760C (en) 1999-12-10 2000-12-08 Method and apparatus for longest match address lookup
AU23341/01A AU2334101A (en) 1999-12-10 2000-12-08 Method and apparatus for longest match address lookup
GB0213390A GB2374174B (en) 1999-12-10 2000-12-08 Method and apparatus for longest match address lookup
EP20000986911 EP1250779A2 (en) 1999-12-10 2000-12-08 Method and apparatus for longest match address lookup
JP2001542955A JP2003516666A (en) 1999-12-10 2000-12-08 Method and apparatus for longest match address lookup
DE2000185388 DE10085388T1 (en) 1999-12-10 2000-12-08 Longest match address search method and apparatus

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US17023299P 1999-12-10 1999-12-10
US60/170,232 1999-12-10
US21296600P 2000-06-21 2000-06-21
US60/212,966 2000-06-21

Publications (2)

Publication Number Publication Date
WO2001043370A2 WO2001043370A2 (en) 2001-06-14
WO2001043370A3 true WO2001043370A3 (en) 2001-11-08

Family

ID=26865861

Family Applications (4)

Application Number Title Priority Date Filing Date
PCT/CA2000/001442 WO2001043370A2 (en) 1999-12-10 2000-12-08 Method and apparatus for longest match address lookup
PCT/CA2000/001444 WO2001043346A2 (en) 1999-12-10 2000-12-08 Method and apparatus for longest match address lookup
PCT/CA2000/001443 WO2001043345A2 (en) 1999-12-10 2000-12-08 Method and apparatus for longest match address lookup
PCT/CA2000/001441 WO2001043400A2 (en) 1999-12-10 2000-12-08 Method and apparatus for longest match address lookup

Family Applications After (3)

Application Number Title Priority Date Filing Date
PCT/CA2000/001444 WO2001043346A2 (en) 1999-12-10 2000-12-08 Method and apparatus for longest match address lookup
PCT/CA2000/001443 WO2001043345A2 (en) 1999-12-10 2000-12-08 Method and apparatus for longest match address lookup
PCT/CA2000/001441 WO2001043400A2 (en) 1999-12-10 2000-12-08 Method and apparatus for longest match address lookup

Country Status (10)

Country Link
US (5) US7423981B2 (en)
EP (4) EP1250775A2 (en)
JP (4) JP4741134B2 (en)
KR (4) KR100748772B1 (en)
CN (5) CN1435030A (en)
AU (4) AU2133701A (en)
CA (4) CA2393760C (en)
DE (4) DE10085390T1 (en)
GB (4) GB2373084A (en)
WO (4) WO2001043370A2 (en)

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