Atm repeater

H - Electricity – 04 – L

Patent

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Details

H04L 12/28 (2006.01) H04L 12/56 (2006.01) H04Q 11/04 (2006.01) H04L 29/06 (2006.01)

Patent

CA 2271879

An ATM repeater realizing high speed hop-by-hop forwarding without employing any high speed processor comprises a processor (11) and a forwarding destination retrieving circuit (12) constituted of hardware. The destination retrieving circuit (12) extracts header information from the received IP packet data and searches an associative memory (21) using the header information as a key. When the corresponding forwarding information cannot be acquired by searching the associative memory (21), a pointer table (22) for HASH search is searched by using an HASH function. When forwarding information is acquired from a forwarding table (23) as a result of the search, hop-by-hop forwarding of the IP packet data is performed based on the forwarding information.

L'invention concerne un répéteur ATM réalisant un transfert point par point à haute vitesse sans utiliser un processeur haute vitesse. Ledit répéteur comprend un processeur (11) et un circuit de recherche de destination de transfert (12), se présentant sous la forme d'un matériel. Le circuit de recherche de destination (12) extrait les informations d'en-tête des données de paquet IP reçues et recherche une mémoire associative (21) qui utilise les informations d'en-tête comme une clé. Lorsque l'information de transfert correspondante ne peut pas être obtenue par recherche de la mémoire associative (21), un tableau de pointeur (22) pour recherche par hachage est recherché au moyen d'une fonction hachage. Lorsque l'information de transfert est trouvée à partir d'un tableau de transfert (23), suite à la recherche, le transfert point par point des données de paquet IP se fait sur la base de l'information de transfert.

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