Importance

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Abstract

A method routes an information packet towards an output port of a telecommunication router comprising N output ports, the router receiving incoming packets comprising a destination address defined by four address elements. The method successively comprises: looking up a first-level table from the first address element of the information packet; looking up a second-level table from the first and second address elements of the packet; searching, with linear or dichotomizing search, a third-level table allowing a third level of search, from the third address element of the packet; searching, with linear or dichotomizing search, a fourth-level table from the fourth address element of the packet. In this way the size of the routing table can be reduced, while still allowing fast processing of incoming packets. Also provided is a router allowing easy integration in a VLSI circuit.

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First Claim