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Methods and apparatus for multi-path flow control within a multi-stage switch fabric

  • US 8,811,183 B1
  • Filed: 10/04/2011
  • Issued: 08/19/2014
  • Est. Priority Date: 10/04/2011
  • Status: Expired due to Fees
First Claim
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1. An apparatus, comprising:

  • a first switch from a plurality of switches associated with a stage of a switch fabric, the first switch configured to receive a first data packet having a destination address of a destination device from a source device, the first switch configured to store the first data packet in a queue,the first switch configured to define a message based on the queue having an available capacity less than a threshold, the first switch configured to include a congestion root indicator in the message if the available capacity of the queue is decreasing and the first switch is sending data packets at substantially a maximum rate, the first switch is configured to not include the congestion root indicator in the message if the first switch is sending data packets at a rate substantially less than the maximum rate, the first switch configured to send the message to the source device such that the source device sends a second data packet having the destination address of the destination device to a second switch from the plurality of switches and not to the first switch from the plurality of switches if the message includes the congestion root indicator.

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