Apparatus and method for finding the longest prefix in a router

Details Apparatus and method for finding the longest prefix in a router Apparatus and method for finding the longest prefix in a router

H - Electricity

04

L

H04L 12/56 (2006.01) H04L 29/12 (2006.01)

Patent

CA 2391275

An apparatus and method for reducing a number of matched entries to more relevant matched entries. In routers, a destination Internet Protocol address of an incoming packet is matched to a router table of Internet Protocol address prefixes, yielding multiple matching entries in the router table. Less relevant matching entries that contain shorter Internet Protocol address prefixes are automatically removed, leaving only the entry including a longest matching prefix.

La présente invention concerne un appareil et un procédé permettant de réduire un nombre d'entrées correspondantes en des entrées correspondantes plus pertinentes. Dans les routeurs, l'adresse Internet de destination d'un paquet entrant est appariée à une table de routage de préfixes d'adresses Internet, ce qui fait que la table de routage comporte plusieurs entrées correspondantes. Selon la présente invention, les entrées correspondantes moins pertinentes contenant des préfixes d'adresse Internet plus courts sont automatiquement éliminées, seule reste l'entrée comprenant le préfixe correspondant le plus long.

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