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Sampling packets for network monitoring

  • US 6,920,112 B1
  • Filed: 06/29/1998
  • Issued: 07/19/2005
  • Est. Priority Date: 06/29/1998
  • Status: Expired due to Fees
First Claim
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1. A system including an input port for receiving network packets;

  • a sampling element for selecting a fraction of those packets for review, said sampling element including a feedback element for adaptively altering said fraction;

    a queue of selected packets;

    a packet-type detector to detect packets of a particular type, said packet type detector coupled to said queue; and

    a frequency measurement element to determine an expected frequency of a particular packet type, said frequency measurement element coupled to said packet-type detector;

    wherein said feedback element is responsive to a length of said queue.

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