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:
Aug. 02, 2011
Filed:
Feb. 25, 2009
William K. Petty, Colorado Springs, CO (US);
William K. Petty, Colorado Springs, CO (US);
LSI Corporation, Milpitas, CA (US);
Abstract
Apparatus and methods for full address resolution in a zoning SAS expander. A single memory circuit is used in a zoning SAS expander to store zone information associated with the SAS address (e.g., WWN) of devices exchanging information through the expander. The source and destination addresses in a received SAS frame are used as inputs to the memory circuit to generate outputs of the memory circuit representing the source and destination zone group identifiers. These outputs are then applied to the zone permission table to determine the zoning permission for forwarding the frame through the expander. Pipelined logic within the expander sequences the operations of the memory circuit and the zone permissions table to account for clock cycle delays in processing of each. In one exemplary embodiment, the memory circuit is a content addressable memory (CAM). In another exemplary embodiment, the CAM also includes port routing information.