Network access system including a programmable access device...

H - Electricity – 04 – L

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Details

H04L 12/28 (2006.01) G06F 15/16 (2006.01) H04L 12/56 (2006.01) H04L 29/06 (2006.01)

Patent

CA 2430129

A distributed network access system (30) in accordance with the present invention includes at least an external processor (42) and a programmable access device (40). The programmable access device has a message interface coupled to the external processor and first and second network interfaces through which packets are communicated with a network. The programmable access device includes a packet header filter and a forwarding table (50) that is utilized to route packets communicated between the first and second network interfaces. In response to receipt of a series of packets, the packet header filter in the programmable access device identifies messages in the series of messages upon which policy-based services are to be implemented and passes identified messages via the message interface to the external processor for processing. In response to receipt of a message, the external processor invokes service control on the message and may also invoke policy control (48) on the message.

La présente invention concerne un système d'accès au réseau distribué incluant au moins un processeur externe et un appareil d'accès programmable. Cet appareil d'accès programmable comporte une interface messages couplée au processeur externe, ainsi que deux interfaces réseau permettant l'échange des paquets avec un réseau. L'appareil d'accès programmable comporte un filtre à en-têtes de paquets et une table de réacheminement qui sert à l'acheminement des paquets échangés entre les deux interfaces réseau. En réaction à la réception d'une série de paquets, le filtre d'en-têtes de paquets de l'appareil d'accès programmable commence par identifier les messages dans la série de messages pour lesquels on doit mettre en oeuvre des services à base de politique, puis remet en vue de traitement les messages identifiés au processeur externe via l'interface messages. En réaction à la réception d'un message, le processeur externe sollicite la commande de service pour le message, tout en pouvant également solliciter la commande de politique pour ce même message.

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