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System and Method for Establishing Protected Connections

  • US 20080170857A1
  • Filed: 09/10/2007
  • Published: 07/17/2008
  • Est. Priority Date: 10/16/2006
  • Status: Active Grant
First Claim
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1. A method for establishing protected connections, comprising:

  • determining a primary path to a first node through a first layer of a multi-layer network, the primary path comprising a plurality of first layer links, at least one link of the plurality of first layer links comprising at least one second layer link at a second layer; and

    determining a secondary path to the first node through the first layer, wherein;

    upon detecting a first link of the plurality of first layer links is protected against link failure by the at least one second layer link, the secondary path comprises the first link of the first layer; and

    upon detecting a second link of the plurality of first layer links is not protected against link failure by the at least one second layer link, the secondary path comprises a third link of the first layer.

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