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Methods, systems, and computer program products for selective layer 2 port blocking using layer 2 source addresses

  • US 20070195793A1
  • Filed: 02/17/2006
  • Published: 08/23/2007
  • Est. Priority Date: 02/17/2006
  • Status: Active Grant
First Claim
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1. A method for selective layer 2 port blocking based on a layer 2 source address, the method comprising:

  • (a) receiving a layer 2 frame;

    (b) identifying, based on a layer 2 source address in the layer 2 frame, an input/output (I/O) port block list;

    (c) performing a forwarding phase lookup to identify a set of ports to which the frame should be forwarded; and

    (d) blocking forwarding of the layer 2 frame to ports in the set that are also in the I/O port block list.

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