WO1996013922A3 - Computer network switching system with expandable number of ports - Google Patents

Computer network switching system with expandable number of ports Download PDF

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Publication number
WO1996013922A3
WO1996013922A3 PCT/US1995/013838 US9513838W WO9613922A3 WO 1996013922 A3 WO1996013922 A3 WO 1996013922A3 US 9513838 W US9513838 W US 9513838W WO 9613922 A3 WO9613922 A3 WO 9613922A3
Authority
WO
WIPO (PCT)
Prior art keywords
switching
arbitration
port
bus
ports
Prior art date
Application number
PCT/US1995/013838
Other languages
French (fr)
Other versions
WO1996013922A2 (en
Inventor
Mark A Lenney
Hon Wah Chin
Original Assignee
Cisco 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 Cisco Systems Inc filed Critical Cisco Systems Inc
Priority to EP95939604A priority Critical patent/EP0788691A2/en
Priority to CA 2203500 priority patent/CA2203500A1/en
Publication of WO1996013922A2 publication Critical patent/WO1996013922A2/en
Publication of WO1996013922A3 publication Critical patent/WO1996013922A3/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/35—Switches specially adapted for specific applications
    • H04L49/351—Switches specially adapted for specific applications for local area network [LAN], e.g. Ethernet switches
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/20—Support for services
    • H04L49/205—Quality of Service based
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/25—Routing or path finding in a switch fabric
    • H04L49/253—Routing or path finding in a switch fabric using establishment or release of connections between ports
    • H04L49/254—Centralised controller, i.e. arbitration or scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/45—Arrangements for providing or supporting expansion

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Computer And Data Communications (AREA)

Abstract

A switching fabric circuit that provides on-the-fly switching of packets, an expandable number of ports, and the interconnection of heterogeneous LAN segments. The switching fabric circuit includes a switching link that comprises a switching bus and a plurality of packet processors, wherein each packet processor is coupled between the switching bus and a LAN segment. The switching bus is a time division multiple access (TDMA) bus, and arbitration for switching bus access is distinct from arbitration for access to the ports of the switching fabric circuit. Switching bus arbitration is done according to one of two priority levels, wherein high priority requests are guaranteed access to the switching bus during a synchronization period in which the high priority requests are made. This provides for guaranteed throughput and on-the-fly switching of packets. Port arbitration may be either uniport port arbitration or multiport port arbitration. Port arbitration is characterized by the transmission of a POE mask by a source port to a destination port and by the subsequent transmission of a DPA signal by the destination port to the source port.
PCT/US1995/013838 1994-10-26 1995-10-25 Computer network switching system with expandable number of ports WO1996013922A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP95939604A EP0788691A2 (en) 1994-10-26 1995-10-25 Computer network switching system with expandable number of ports
CA 2203500 CA2203500A1 (en) 1994-10-26 1995-10-25 Computer network switching system with expandable number of ports

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/330,074 US5561669A (en) 1994-10-26 1994-10-26 Computer network switching system with expandable number of ports
US08/330,074 1994-10-26

Publications (2)

Publication Number Publication Date
WO1996013922A2 WO1996013922A2 (en) 1996-05-09
WO1996013922A3 true WO1996013922A3 (en) 1996-06-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/013838 WO1996013922A2 (en) 1994-10-26 1995-10-25 Computer network switching system with expandable number of ports

Country Status (3)

Country Link
US (1) US5561669A (en)
EP (1) EP0788691A2 (en)
WO (1) WO1996013922A2 (en)

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