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Packet network linear protection systems and methods in a dual home or multi-home configuration

  • US 9,407,535 B2
  • Filed: 04/03/2014
  • Issued: 08/02/2016
  • Est. Priority Date: 04/03/2014
  • Status: Active Grant
First Claim
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1. A packet network linear protection method in a dual or multi-home configuration, comprising:

  • designating each of a plurality of home nodes in the dual or multi-home configuration as a working home or a protect home;

    designating each link between each of the plurality of home nodes and an end node in the dual or multi-home configuration as active or standby;

    operating a protection switch state machine based on an associated linear protection protocol at each of the plurality of home nodes and the end node;

    communicating protection messages to each of the plurality of home nodes from the end node;

    communicating protection states in an associated protection switch state machine by each of the plurality of home nodes to other home nodes and to the end node;

    communicating the protection states by each of the plurality of home nodes to other home nodes via the end node; and

    implementing protection switching responsive to a fault on any link between each of the plurality of home nodes and the end node, wherein the associated protection switch state machine at a home node of the plurality of home nodes isolated by the fault is out of synchronization until recovery of the fault.

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