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SYSTEM AND METHOD FOR RESTRICTING NETWORK ACCESS USING FORWARDING DATABASES

  • US 20100040059A1
  • Filed: 02/12/2009
  • Published: 02/18/2010
  • Est. Priority Date: 05/03/2006
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving a data unit including layer 2 client-identification data;

    determining whether the data unit includes layer 3 address data;

    if the data unit does not include any layer 3 address data;

    determining whether the layer 2 client-identification data has been recorded;

    if the layer 2 client-identification data has not been recorded;

    recording the layer 2 client-identification data;

    enabling a layer 3 address assignment status restriction attribute;

    if the layer 2 client-identification data has been recorded, unless the address assignment status restriction attribute is enabled, forwarding the data unit.

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