Forwarding data in a data communication network
First Claim
1. An apparatus for forwarding data in a data communications network having as components:
- nodes and links therebetween;
the apparatus comprising one or more processors;
the apparatus configured to forward, before an event of non availability of a component in the network occurs, data towards a destination on a label switched path;
the apparatus configured to advertise to nodes in the network, before the event of non availability of the component in the network occurs, its label for the label switched path and a repair label for a repair label switched path for use in the event of non availability of the component in the network;
the apparatus configured to advertise to a remote node in the network, before the event of non availability of the component occurs, additional information for deriving repair label switched path information at the remote node.
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Accused Products
Abstract
An apparatus for forwarding data in a data communications network having as components nodes and links therebetween is described. The apparatus is arranged to forward data towards a destination on a label switched path and advertise in a label advertisement to nodes in the network in a label advertisement its label for the label switched path and its label for a repair label switched path for use in the event of non availability of a component in the network. The apparatus is further arranged to advertise to a remote node in the network in a label advertisement additional information for deriving repair label switched path information at the remote node.
13 Citations
32 Claims
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1. An apparatus for forwarding data in a data communications network having as components:
- nodes and links therebetween;
the apparatus comprising one or more processors; the apparatus configured to forward, before an event of non availability of a component in the network occurs, data towards a destination on a label switched path; the apparatus configured to advertise to nodes in the network, before the event of non availability of the component in the network occurs, its label for the label switched path and a repair label for a repair label switched path for use in the event of non availability of the component in the network; the apparatus configured to advertise to a remote node in the network, before the event of non availability of the component occurs, additional information for deriving repair label switched path information at the remote node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- nodes and links therebetween;
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18. A method of forwarding data in a data communications network having as components nodes and links therebetween, wherein the method is performed at an apparatus configured to forward data towards a destination on a label switched path, the method comprising:
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advertising to nodes in the network before an event of non availability of a component in the network occurs, a label for the label switched path and a repair label for a repair label switched path for use in the event of non availability of the component in the network; and advertising to a remote node in the network before the event of non availability of the component occurs, additional information for deriving repair label switched path information at the remote node; wherein the apparatus comprises one or more processors.
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19. A non-transitory computer readable storage medium comprising one or more sequences of instructions which, when executed by one or more processors, cause the one or more processors to perform steps comprising:
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forwarding data in a data communications network having as components nodes and links therebetween, wherein the forwarding is performed at an apparatus configured to forward data towards a destination on a label switched path, wherein the forwarding comprises; advertising to nodes in the network before an event of non availability of a component in the network occurs, a label for the label switched path and a repair label for a repair label switched path for use in the event of non availability of the component in the network, and advertising to a remote node in the network before the event of non availability of the component occurs, additional information for deriving repair label switched path information at the remote node. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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- 30. An apparatus for forwarding data in a data communication network having as components node and links therebetween, the apparatus being configured to forward data towards a destination on a label switched path, the apparatus further configured to receive (a) an advertisement of labels from an advertising node, the advertisement of labels including a label for the label switched path, a repair label for a repair label switched path for use in an event of non availability of a component in the network, and (b) additional information for deriving the repair label switched path for use in the event of non-availability of the component in the network and deriving repair label switched path information therefrom, wherein the apparatus receives the advertisement of labels and the additional information before the event of non-availability of the component in the network occurs, wherein the apparatus comprises a processor.
Specification