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Data flow monitoring at a network node using periodically incremented counters for comparison to predetermined data flow thresholds

  • US 6,381,649 B1
  • Filed: 02/05/1999
  • Issued: 04/30/2002
  • Est. Priority Date: 02/05/1999
  • Status: Expired due to Term
First Claim
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1. A method of monitoring data traffic at a node on a network, the node facilitating data transfer on at least one link having at least one class of service, the data being transferred in data packets and each data packet including at least one unit of data, said method comprising:

  • for each of at least one selected link and class of service, storing an updatable value in a storing device;

    periodically incrementing a counter value in a counter at a rate determined by an allowable data rate associated with the selected link and class of service;

    receiving a data packet;

    counting a number of units of data in the data packet;

    computing an adjusted updatable value by adjusting the updatable value according to the counter value when the data packet was received and the number of units of data in the data packet;

    comparing the adjusted updatable value to a predetermined threshold associated with the selected link and class of service; and

    marking the data packet with respect to the allowable data rate based on whether the adjusted updatable value exceeds the predetermined threshold.

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