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:
Sep. 30, 2008
Filed:
Jul. 20, 2004
Frank R. Dropps, Maple Grove, MN (US);
Craig M. Verba, Maple Grove, MN (US);
Gary M. Papenfuss, St. Paul, MN (US);
Ernest G Kohlwey, Eagan, MN (US);
Mark A. Owen, Apple Valley, MN (US);
Frank R. Dropps, Maple Grove, MN (US);
Craig M. Verba, Maple Grove, MN (US);
Gary M. Papenfuss, St. Paul, MN (US);
Ernest G Kohlwey, Eagan, MN (US);
Mark A. Owen, Apple Valley, MN (US);
QLOGIC, Corporation, Aliso Viejo, CA (US);
Abstract
Method and system for routing fiber channel frames using a fiber channel switch element is provided. The method includes, inserting a time stamp value in a fiber channel frame that is received at a receive segment of the fiber channel switch element; determining if a timeout occurs after a frame arrives at a receive buffer; and processing the frame if the timeout occurred. The method also includes, determining if a delta time value, which provides an accumulated wait time for a frame, is present in frame data; subtracting the delta time stamp value from a global time stamp value and using the resulting time stamp value to determine frame timeout status in the fiber channel switch element. A timeout checker circuit declares a timeout after comparing a time stamp value that is inserted in a fiber channel frame with a programmed time out value and global counter value.