The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 2009
Filed:
Dec. 17, 2004
Jack C. Wybenga, Plano, TX (US);
Patricia K. Sturm, Marion, IA (US);
Patrick W. Ireland, Sanger, TX (US);
Jack C. Wybenga, Plano, TX (US);
Patricia K. Sturm, Marion, IA (US);
Patrick W. Ireland, Sanger, TX (US);
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A router comprising a switch fabric and routing nodes coupled to the switch fabric. Each routing node comprises a trie tree search table for storing routing information associated with received variable length subnet masks. The trie tree search table comprises a plurality of stages that are searched by N-bit address symbols derived from the received variable length subnet masks. Each routing node also comprises a control processor for generating the stages associated with the trie tree search table. The control processor generates for each entry in a first one of the plurality of stages: 1) an end flag indicating whether each entry is a leaf or a branch; 2) a subnet flag indicating whether a subnet mask ends at each entry; and 3) a masked flag indicating whether a subnet mask ending at each entry ends on a boundary of an N-bit address symbol associated with entry.