Packet network linear protection systems and methods in a dual home or multi-home configuration
First Claim
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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Accused Products
Abstract
A packet network linear protection method, a network, and a node in a dual or multi-home configuration include 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; and 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.
29 Citations
18 Claims
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1. A packet network linear protection method in a dual or multi-home configuration, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A network providing packet network linear protection in a dual or multi-home configuration, comprising:
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an end node; a plurality of home nodes each communicatively coupled to the end node by an associated link in the dual or multi-home configuration; and an associated linear protection protocol operating between the end node and the plurality of home nodes; wherein the end node and the plurality of home nodes are configured to; receive a designation as a working home or a protect home, designate each associated link between each of the plurality of home nodes and the end node as active or standby, operate a protection switch state machine based on the associated linear protection protocol, communicate protection messages therebetween, communicate protection states in an associated protection switch state machine therebetween, communicate the protection states by each of the plurality of home nodes to other home nodes via the end node, and implement 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. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A packet network linear protection method in a dual or multi-home configuration, comprising:
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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; and 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, wherein the associated linear protection protocol is configured to switch in a single home configuration between the end node and another end node, and wherein the packet network linear protection method adapts the associated linear protection protocol to switch between the end node and the plurality of home nodes while preserving the protection messages and the associated protection switch state machine of the associated linear protection protocol. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification