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System and method for detecting unidirectional links

  • US 7,480,251 B2
  • Filed: 06/04/2004
  • Issued: 01/20/2009
  • Est. Priority Date: 08/30/1999
  • Status: Expired due to Fees
First Claim
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1. A method of testing a primary device for two-way communication between the primary device and one or more neighbor devices in communication therewith in a network, the method comprising:

  • inserting into an echo packet an originating device identifier in an originating device field and a primary device identifier in a primary device field;

    transmitting the echo packet containing the originating device identifier and the primary device identifier from the primary device; and

    receiving a reply packet at the primary device and detecting two-way communication if the reply packet contains the originating device identifier in the originating device field and the primary device identifier in the primary device field.

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