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IP subnet discovery with ranked results

  • US 7,970,938 B1
  • Filed: 08/16/2006
  • Issued: 06/28/2011
  • Est. Priority Date: 08/16/2006
  • Status: Active Grant
First Claim
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1. A method of determining a probable IP subnet of a network, the method comprising:

  • maintaining a table of possible networks in a memory of a computer system, wherein entries of the table of possible networks comprise respective network addresses, respective subnet masks and respective scores;

    observing a packet received by the computer system;

    determining an IP address of the packet;

    comparing the IP address of the packet with the respective network addresses of the entries of the table of possible networks; and

    provided the IP address of the packet falls under the respective network address of a particular entry, adjusting the respective score of the particular entry;

    provided the IP address of the packet does not fall under the respective network addresses of the entries of the table of possible networks, creating a new entry in the table of possible networks corresponding to the IP address of the packet; and

    ranking the entries of the table of possible networks based on their respective score.

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