Method and device for transmitting data

H - Electricity – 04 – L

Patent

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Details

H04L 12/66 (2006.01) H04L 12/46 (2006.01) H04L 29/06 (2006.01) H04L 29/12 (2006.01) H04Q 11/04 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2376950

The invention relates to a method and a gateway (N1) for transmitting data from a first router (R1) to a second router (R2) via an external communications network (ATM), which makes it possible to couple notably local networks (LAN1, LAN2) connected to these routers. The first router (R1) is connected to the communications network (ATM) via a gateway (N1) which, among other things, is used for conversion between a transmission protocol used by the first router (R1) and a transmission protocol used by the communications network (ATM). The first router assigns to the data a hardware address (MAC2) which identifies the second router (R2) and constitutes a target address. In the gateway (N1) a network address (ATM2) which identifies an output point (N2) from the communications network is assigned to this target address. On the basis of this network address the data are transmitted to the output point (N2) of the communications network and from there to the second router (R2).

L'invention concerne un procédé et une passerelle (N1) pour la transmission de données d'un premier routeur (R1) à un deuxième routeur (R2) par l'intermédiaire d'un réseau de communication externe (ATM), permettant ainsi de coupler des réseaux locaux (LAN1, LAN2) reliés en particulier à ces routeurs. Le premier routeur (R1) est relié au réseau de communication (ATM) par l'intermédiaire d'une passerelle (N1) servant, entre autres, à la conversion entre un protocole de transmission utilisé par le premier routeur (R1) et un protocole de transmission utilisé dans le réseau de communication (ATM). Le premier routeur affecte aux données, comme adresse cible, une adresse matérielle (MAC2) identifiant le deuxième routeur (R2). A cette adresse cible est affectée, dans la passerelle (N1), une adresse de réseau (ATM2) identifiant un point de sortie (N2) du réseau de communication, grâce à laquelle les données sont transmises au point de sortie (N2) du réseau de communication et, de là, au deuxième routeur (R2).

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