System and method for fault notification in a data communication network
First Claim
1. A method for propagating a fault notification in a network comprising:
- identifying possible points of failure in a network;
forming indicia of each identified possible point of failure;
propagating the indicia of the identified possible points of failure within the network;
storing the indicia of the identified possible points of failure in network nodes; and
determining whether a fault has occurred in the network and when a fault has occurred, propagating a fault notification by at least one of the network nodes that detects the fault to its neighboring network nodes.
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Abstract
A system and method for fault notification in a data communication network. In accordance with the invention, notification of each fault occurring in the network is quickly and efficiently propagated throughout the network. In response, appropriate action can be taken to recover from the fault. Possible points of failure are identified in the network. Indicia of each identified possible point of failure is formed. The indicia of the identified possible points of failure are propagated within the network. The indicia of the identified possible points of failure are stored in network nodes. Whether a fault has occurred in the network is determined. When a fault has occurred, a fault notification is propagated by at least one of the network nodes that detects the fault to its neighboring network nodes. Propagation of the fault notification may include sending the fault notification by a label switched packet. The label switched packet may have a fault information label (FIL) that distinguishes the fault notification from data traffic.
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Citations
31 Claims
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1. A method for propagating a fault notification in a network comprising:
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identifying possible points of failure in a network;
forming indicia of each identified possible point of failure;
propagating the indicia of the identified possible points of failure within the network;
storing the indicia of the identified possible points of failure in network nodes; and
determining whether a fault has occurred in the network and when a fault has occurred, propagating a fault notification by at least one of the network nodes that detects the fault to its neighboring network nodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 26, 27, 28, 29, 30, 31)
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25. A system for propagating a fault notification in a network comprising a plurality of interconnected network nodes, each having stored indicia of identified possible points of failure in the network and wherein, when a fault occurs in the network, at least one of the network nodes that detects the fault propagates a fault notification by to its neighboring network nodes, each neighboring node having a multicast distribution list for distributing the fault notification throughout the network.
Specification