Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2008-01-01
2008-01-01
Patel, Ajit (Department: 2616)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S389000
Reexamination Certificate
active
07315547
ABSTRACT:
There is provided a packet forwarding device which always carries out high-speed search in a routing table by using a TCAM. The device includes a CAM (120) which includes a first CAM entry (120-1) to set high order bits of destination address conditions and a second CAM entry (120-2) to set low order bits of the destination address conditions, a first search unit which compares high order bits of a destination address of an input packet with the first CAM entry to search for a matching destination address condition, and a second search unit which compares low order bits of the destination address of the packet with the second CAM entry to search for a matching destination address condition when no destination address condition corresponding to the high order bits of the destination address of the packet is uniquely decided based on a result of the search. Forwarding information of the packet is set based on a destination address condition uniquely corresponding to the destination address of the packet retrieved by one of the first and second search units.
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Akahane Shinichi
Yazaki Takeki
A. Marquez, Esq. Juan Carlos
Fisher Esq. Stanley P.
Hitachi , Ltd.
Patel Ajit
Reed Smith LLP
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