System and method for fast-rerouting of data in a data communication network
First Claim
1. A method of re-routing data traffic in a data communication network comprising:
- forming a protection path between a base node and an end node wherein the protection path avoids an intermediate node between the base node and the end node;
advertising within the network availability of protection provided by the protection path;
forming a protected path for communicating data, the protected path passing through the intermediate node;
detecting a fault in the network; and
avoiding the fault by using the protection path for communicating data.
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Abstract
A system and method for the fast re-routing of data in a data communication network. A protection label path is formed between a base node and an end node wherein the protection path avoids an intermediate node between the base node and the end node. Availability of protection provided by the protection path is advertised within the network. A protected path is formed for communicating data, the protected path passing through the intermediate node. When a fault is detected in the network, the fault is avoided by using the protection path for communicating data. Thus, alternate paths are defined for bypassing entire network nodes. As such, the protection paths allow data to be re-routed so as to avoid failed network nodes as well as failed network links.
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Citations
31 Claims
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1. A method of re-routing data traffic in a data communication network comprising:
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forming a protection path between a base node and an end node wherein the protection path avoids an intermediate node between the base node and the end node;
advertising within the network availability of protection provided by the protection path;
forming a protected path for communicating data, the protected path passing through the intermediate node;
detecting a fault in the network; and
avoiding the fault by using the protection path for communicating data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20)
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12. A method of re-routing data traffic in a data communication network comprising:
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identifying a base node in the network;
identifying an intermediate node in the network that is exactly one hop away from the base node;
identifying an end node in the network that is exactly one hop away from the intermediate node;
forming a protection path between the base node and the end node wherein the protection path avoids the intermediate node;
advertising within the network availability of protection provided by the protection path;
forming a protected path for communicating data, the protected path passing through the intermediate node;
detecting a fault in the network; and
avoiding the fault by using the protection path for communicating data.
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- 21. A system for re-routing data traffic in a data communication network comprising a plurality of interconnected nodes, at least one node having stored indicia of a protection path, the protection path extending between a base node and an end node wherein the protection path avoids a intermediate node between the base node and the end node, and the system comprising a protected path for communicating data, the protected path passing through the intermediate node, wherein when a fault is detected, the fault is avoided by using the protected path.
Specification