Backpressure mechanism for switching fabric

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 7983287
APP PUB NO 20080212472A1
SERIAL NO

12120533

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Abstract

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Roughly described, a packet switching fabric contains a separate queue scheduler for each combination of an input module and a fabric output port. The schedulers may also be specific to a single class of service. Each queue scheduler schedules its packets without regard to state of other input queues and without regard to packets destined for other output ports. In an aspect, the fabric manages per-flow bandwidth utilization of output port bandwidth capacity by monitoring the same and asserting backpressure toward the queue scheduler for any thread that is exceeding its bandwidth allocation. In another aspect, a switching fabric uses leaky buckets to apply backpressure in response to overutilization of downstream port capacity by particular subflows. In another aspect, a switching fabric includes a cascaded backpressure scheme.

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Patent Owner(s)

Patent OwnerAddress
INTEL CORPORATION2200 MISSION COLLEGE BLVD SANTA CLARA CA 95054

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Agarwal, Gaurav San Jose, US 52 412
Mo, Jeonghoon Sunnyvale, US 13 190
Musacchio, John T Berkeley, US 5 201
Myers,, Jr Roy T Santa Clara, US 2 3
Parekh, Shyam P Orinda, US 16 259
Walrand, Jean Berkeley, US 18 685

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