WO1997024842A3 - Method and system for resilient frame relay network interconnection - Google Patents

Method and system for resilient frame relay network interconnection Download PDF

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Publication number
WO1997024842A3
WO1997024842A3 PCT/US1996/020275 US9620275W WO9724842A3 WO 1997024842 A3 WO1997024842 A3 WO 1997024842A3 US 9620275 W US9620275 W US 9620275W WO 9724842 A3 WO9724842 A3 WO 9724842A3
Authority
WO
WIPO (PCT)
Prior art keywords
resilient
atm
physical interface
self
network
Prior art date
Application number
PCT/US1996/020275
Other languages
French (fr)
Other versions
WO1997024842A2 (en
Inventor
David E Mcdysan
Original Assignee
Mci Communications Corp
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 Mci Communications Corp filed Critical Mci Communications Corp
Publication of WO1997024842A2 publication Critical patent/WO1997024842A2/en
Publication of WO1997024842A3 publication Critical patent/WO1997024842A3/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
    • H04L45/10—Routing in connection-oriented networks, e.g. X.25 or ATM
    • 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]
    • H04L12/46—Interconnection of networks
    • H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
    • H04L12/4608—LAN interconnection over ATM networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/10—Packet switching elements characterised by the switching fabric construction
    • H04L49/104—Asynchronous transfer mode [ATM] switching fabrics
    • H04L49/105—ATM switching elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
    • H04Q11/0478—Provisions for broadband connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5614—User Network Interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5625—Operations, administration and maintenance [OAM]
    • H04L2012/5627—Fault tolerance and recovery

Abstract

A method and system for resilient internetwork connection of frame relay (FR) networks and/or end systems. For FR relay networks interconnected by a self-healing network, a standard protocol is provided which allows a resilient network-to-network interface NNI to automatically respond to physical interfaces failures detected by the self-healing network. Switching gateways in the resilient NNI, re-route further traffic to avoid the failed physical interface. In one embodiment, a simple set of interacting protocols and mechanisms control communication between FR/ATM gateways and ATM switches. Each FR/ATM gateway includes interworking function (IWF) processing modules for converting user data between frame relay packets and ATM cells and for processing status signaling messages to achieve a resilient NNI. Status signaling messages are used to determine when the physical interface which receives cell data differs from the physical interface over which data was sent as the result of a failure detected by the self-healing network. Cell traffic can then be switched to the receive ATM physical interface or to another pre-configured back-up physical interface. End-to-end resiliency is obtained between frame relay networks interconnected by a self-healing network which is not vulnerable to single point failure.
PCT/US1996/020275 1995-12-29 1996-12-30 Method and system for resilient frame relay network interconnection WO1997024842A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US58126395A 1995-12-29 1995-12-29
US08/581,263 1995-12-29

Publications (2)

Publication Number Publication Date
WO1997024842A2 WO1997024842A2 (en) 1997-07-10
WO1997024842A3 true WO1997024842A3 (en) 1997-08-28

Family

ID=24324505

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/020275 WO1997024842A2 (en) 1995-12-29 1996-12-30 Method and system for resilient frame relay network interconnection

Country Status (2)

Country Link
US (1) US6226260B1 (en)
WO (1) WO1997024842A2 (en)

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WO1997024842A2 (en) 1997-07-10
US6226260B1 (en) 2001-05-01

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