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Detection of failures in network devices

  • US 10,461,992 B1
  • Filed: 09/26/2017
  • Issued: 10/29/2019
  • Est. Priority Date: 09/26/2017
  • Status: Active Grant
First Claim
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1. A method of monitoring network devices for failures, the method comprising:

  • transmitting packets in a network using a network monitoring agent executing on a server computer;

    determining that multiple packets transmitted by the network monitoring agent did not reach respective destination addresses of the multiple packets;

    transmitting traceroute packets in order to determine why the multiple packets did not reach the destination addresses;

    determining a set of frequencies of last hops associated with the traceroute packets that did not reach the destination addresses;

    clustering the set of frequencies into first and second groups, wherein the first group is a high-frequency group of last hops and the second group is a lower-frequency group of last hops;

    comparing a most frequent last hop in the first group with another last hop in the second group within the set of frequencies; and

    determining a network device associated with the most frequent last hop is defective when its frequency exceeds the other last hop frequencies by a predetermined amount; and

    re-routing network traffic around the network device.

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