US Patent 7580354 Multi-speed cut through operation in fibre channel switches

Patent 7580354 was granted and assigned to QLogic on August, 2009 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

QLogic

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

75803540

Date of Patent

August 25, 2009

Patent Application Number

108945870

Date Filed

July 20, 2004

Patent Primary Examiner

‌

Kwang B Yao

Patent abstract

A method and system for routing frames based on a port's speed using a fiber channel switch element is provided. The method includes, receiving a portion of a frame in a receive buffer of a port; determining a frame length threshold; and setting up a status bit based on the port's speed, the frame length threshold and an amount of frame received. The status bit is sent to a transmit segment of the fiber channel switch element and the frame length threshold value is inversely proportional to the port's speed. Also, if the receive buffer is almost full when a frame arrives at the receive port, then a cut status is based on a frames end of frame (“EOF”) value.