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Detecting path break conditions while minimizing network overhead

  • US 10,637,721 B2
  • Filed: 03/12/2018
  • Issued: 04/28/2020
  • Est. Priority Date: 03/12/2018
  • Status: Active Grant
First Claim
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1. A method for determining a break condition in a communication path by a receiving network appliance of a plurality of network appliances, the method comprising:

  • transmitting a first plurality of data packets for a data flow, by a transmitting network appliance to a receiving network appliance over a communication path;

    receiving at the receiving network appliance, the first plurality of data packets for the data flow over the communication path;

    determining that;

    a first predetermined time interval has elapsed since a last data packet of the first plurality of data packets was received by the receiving network appliance over the communication path;

    no data packets of any data flow have been received during the first predetermined time interval; and

    no health probe packets have been received during the first predetermined time interval;

    after expiration of the first predetermined time interval and during a second predetermined time interval;

    determining by the transmitting network appliance that no data packets of any data flow have been transmitted from the transmitting network appliance to the receiving network appliance during the first predetermined time interval, and transmitting a plurality of health probe packets to the receiving network appliance;

    expecting receipt at the receiving network appliance of either a data packet of a data flow, or a health probe packet of the plurality of health probe packets, during the second predetermined time interval;

    determining, by the receiving network appliance, that;

    the second predetermined time interval has elapsed;

    no data packets of any data flow have been received during the second predetermined time interval; and

    no health probe packets have been received during the second predetermined time interval; and

    sending a message to the transmitting network appliance that there is likely a break condition in the communication path.

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