WO1996013108A3 - Method and apparatus for determining ip communications path - Google Patents

Method and apparatus for determining ip communications path Download PDF

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Publication number
WO1996013108A3
WO1996013108A3 PCT/IB1995/001027 IB9501027W WO9613108A3 WO 1996013108 A3 WO1996013108 A3 WO 1996013108A3 IB 9501027 W IB9501027 W IB 9501027W WO 9613108 A3 WO9613108 A3 WO 9613108A3
Authority
WO
WIPO (PCT)
Prior art keywords
path
determining
source
communications path
snmp
Prior art date
Application number
PCT/IB1995/001027
Other languages
French (fr)
Other versions
WO1996013108A2 (en
Inventor
Ajay Aggarwal
Walter Scott
Eric Rustici
David Bucciero
Andrew Haskins
Wallace Matthews
Original Assignee
Cabletron Systems 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 Cabletron Systems Inc filed Critical Cabletron Systems Inc
Priority to EP95936062A priority Critical patent/EP0788699A2/en
Priority to AU38142/95A priority patent/AU3814295A/en
Publication of WO1996013108A2 publication Critical patent/WO1996013108A2/en
Publication of WO1996013108A3 publication Critical patent/WO1996013108A3/en

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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
    • H04L45/02—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
    • H04L45/20—Hop count for routing purposes, e.g. TTL
    • 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
    • H04L45/26—Route discovery packet

Abstract

Method and apparatus for determining a data path between source (11) and destination (12) IP devices. A TTL mechanism is used, in combination with loose-source routing, to incrementally discover the routers on the path, wherein the querying node (13) sending the UDP probe packets need not be the source node. Once an intermediate router on the path is known which can communicate via SNMP, an SNMP query may be sent to determine the next-hop router from the IP routing table. If this fails, the method reverts to the incrementing TTL mechanism.
PCT/IB1995/001027 1994-10-25 1995-10-24 Method and apparatus for determining ip communications path WO1996013108A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP95936062A EP0788699A2 (en) 1994-10-25 1995-10-24 Method and apparatus for determining ip communications path
AU38142/95A AU3814295A (en) 1994-10-25 1995-10-24 Method and apparatus for determining ip communications path

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/328,513 1994-10-25
US08/328,513 US5675741A (en) 1994-10-25 1994-10-25 Method and apparatus for determining a communications path between two nodes in an Internet Protocol (IP) network

Publications (2)

Publication Number Publication Date
WO1996013108A2 WO1996013108A2 (en) 1996-05-02
WO1996013108A3 true WO1996013108A3 (en) 1996-08-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1995/001027 WO1996013108A2 (en) 1994-10-25 1995-10-24 Method and apparatus for determining ip communications path

Country Status (4)

Country Link
US (1) US5675741A (en)
EP (1) EP0788699A2 (en)
AU (1) AU3814295A (en)
WO (1) WO1996013108A2 (en)

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US5675741A (en) 1997-10-07

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