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:
Mar. 14, 2006
Filed:
Nov. 02, 2000
Jonathan S. Turner, St. Louis, MO (US);
Zubin D. Dittia, Sunnyvale, CA (US);
Jonathan S. Turner, St. Louis, MO (US);
Zubin D. Dittia, Sunnyvale, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Methods and apparatuses are disclosed for controlling the rate at which packets are sent from a first to a second component of a packet switching system. In one implementation, the first component represents an input line card to a packet switch, and the second component represents an output of the packet switch. In such a system, a state is maintained for each output at each line card. For example, these states may include an unconstrained state during which traffic is sent at a full rate to the output, an off state during which no traffic is sent to the output, and a constrained state during which traffic is sent at a reduced rate to the output. Typically, this reduced rate is proportional to the arrival rate of packets at the input line card which are destined for the output. The state of the output is changed based on received flow control information about the output and whether traffic remains queued for the output at the input line card.