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1. WO1996004729 - A NETWORK SWITCH

Publication Number WO/1996/004729
Publication Date 15.02.1996
International Application No. PCT/US1995/009665
International Filing Date 01.08.1995
Chapter 2 Demand Filed 09.02.1996
IPC
H04L 12/28 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12Data switching networks
28characterised by path configuration, e.g. LAN or WAN
H04L 12/66 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12Data switching networks
66Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
H04L 12/935 2013.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12Data switching networks
70Packet switching systems
931Switch fabric architecture
935Switch interfaces, e.g. port details
H04Q 11/04 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
QSELECTING
11Selecting arrangements for multiplex systems
04for time-division multiplexing
H04L 12/70 2013.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12Data switching networks
70Packet switching systems
CPC
H04L 12/2801
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12Data switching networks
28characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
2801Broadband local area networks
H04L 12/66
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12Data switching networks
66Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
H04L 2012/5615
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12Data switching networks
54Store-and-forward switching systems
56Packet switching systems
5601Transfer mode dependent, e.g. ATM
5614User Network Interface
5615Network termination, e.g. NT1, NT2, PBX
H04L 2012/5619
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12Data switching networks
54Store-and-forward switching systems
56Packet switching systems
5601Transfer mode dependent, e.g. ATM
5619Network Node Interface, e.g. tandem connections, transit switching
H04L 49/3081
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
49Packet switching elements
30Peripheral units, e.g. input or output ports
3081ATM peripheral units, e.g. policing, insertion or extraction
H04Q 11/0478
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
QSELECTING
11Selecting arrangements for multiplex systems
04for time-division multiplexing
0428Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
0478Provisions for broadband connections
Applicants
  • 3COM CORPORATION [US/US]; 5400 Bayfront Plaza P.O. Box 58145 Santa Clara, CA 95052-8145, US
Inventors
  • BRONSTEIN, Zvika; IL
Agents
  • HAYNES, Mark, A.; Wilson, Sonsini, Goodrich & Rosati 650 Page Mill Road Palo Alto, CA 94304, US
Priority Data
11053701.08.1994IL
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) A NETWORK SWITCH
(FR) COMMUTATEUR DE RESEAU
Abstract
(EN)
An asynchronous transfer mode (ATM) workstation (20), an ATM switch (12), legacy LAN workstations (14) and at least two network switches (10) are provided in a network. The ATM switch (12) is connectable to a multiplicity of ATM workstations (20) and the network switches (10) are each connectable to a different multiplicity of the legacy LAN workstations (14) and also to the ATM switch (12). Each network switch (10) includes apparatus for converting (fig. 5) back and forth between a legacy LAN protocol and an ATM protocol and apparatus for creating at least one emulated LAN from some of the legacy LAN and ATM workstations (20). The apparatus for converting (fig. 5) includes a cell memory (54) and a cell memory manager (50). The cell memory (54) stores fixed length cells of message data and the cell memory manager (50) for inputing and outputing queues of cells which form a message. The apparatus for converting (fig. 5) also includes legacy LAN and ATM interface units (40, 68) for communicating respectively with the legacy LAN and the ATM workstations. On input, the legacy LAN interface unit (40) breaks a legacy LAN message into a plurality of cells and, on outptut, provides a plurality of cells as a single message. The apparatus for creating (fig. 5) includes an address translation unit (44) having a map of the network and a listing of which legacy LAN and ATM workstations (14, 20) belong to which of the emulated LANs. The listing includes a listing of which legacy LAN workstations (14) require that their messages be converted to the ATM protocol in order to pass through the ATM switch (10).
(FR)
Un poste de travail (20) à mode de transfert asynchrone (MTA), un commutateur MTA (12), des postes de travail de réseaux locaux (RL) préexistants (legacy) et au moins deux commutateurs de réseau (10) sont prévus dans un réseau. Le commutateur MTA (12) est connectable à une multiplicité de postes de travail MTA (20) et les commutateurs de réseau (10) sont chacun connectables à un groupe différent de postes de travail RL préexistants (14) et également au commutateur MTA (12). Chaque commutateur de réseau (10) comprend un appareil de conversion (fig. 5) entre le protocole RL préexistants et un protocole MTA, ainsi qu'un appareil conçu pour créer au moins un RL émulé à partir de certaines stations de travail RL et MTA (20). L'appareil de conversion (fig. 5) comporte une mémoire de cellules (54) et un gestionnaire (50) de mémoire de cellules. La mémoire de cellules (54) mémorise les cellules de longueur fixe de données de message et du gestionnaire de mémoire de cellules (50) pour entrer et sortir des queues de cellules formant un message. L'appareil de conversion (fig.5) comprend également des unités d'interface (40, 68) RL préexistant et MTA conçues pour communiquer respectivement avec les stations de travail RL et MTA. Lors de l'entrée, l'unité d'interface RL préexistants (40) divise un message RL préexistants en une pluralité de cellules et, lors de la sortie, produit une pluralité de cellules sous la forme d'un seul message. L'appareil de création (fig.5) comporte un unité de translation d'adresse (44) possédant une carte du réseau et une liste d'attribution des stations de travail de RL préexistants et MTA (14, 20) aux réseaux locaux émulés. La liste comprend également une liste des stations de travail RL préexistants (14) dont le message doit être converti en protocole MTA pour pouvoir passer par le commutateur MTA (10).
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