Dynamic control channel establishment for software-defined networks having centralized control
First Claim
1. A method comprising:
- receiving, by a centralized controller, a discover message originating from a network node, wherein the discover message includes an intermediate node list that specifies a plurality of network nodes the discover message traversed from the network node to an edge node;
determining, by the centralized controller and based on the plurality of nodes specified by the discover message, a path from the edge node to the network node;
allocating, by the centralized controller, each of a plurality of Multi-protocol Label Switching (MPLS) labels to a respective outgoing interface of each of the plurality of network nodes; and
outputting, by the centralized controller, one or more control messages for configuring the network node, wherein the control messages are encapsulated within a label stack comprising the allocated plurality of labels.
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Abstract
Dynamic control channel establishment for an access network is described in which a centralized controller provides seamless end-to-end service from a core-facing edge of a network to access nodes. For example, a method includes receiving, by the centralized controller, a discover message originating from a network node, which includes an intermediate node list that specifies a plurality of network nodes the discover message traversed from the network node to an edge node, determining, based on the plurality of nodes specified by the discover message, a path from the edge node to the network node, allocating each of a plurality of Multi-protocol Label Switching (MPLS) labels to a respective outgoing interface of each of the plurality of network nodes, and outputting one or more control messages for configuring the network node, wherein the control messages are encapsulated within a label stack comprising the allocated plurality of labels.
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Citations
13 Claims
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1. A method comprising:
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receiving, by a centralized controller, a discover message originating from a network node, wherein the discover message includes an intermediate node list that specifies a plurality of network nodes the discover message traversed from the network node to an edge node; determining, by the centralized controller and based on the plurality of nodes specified by the discover message, a path from the edge node to the network node; allocating, by the centralized controller, each of a plurality of Multi-protocol Label Switching (MPLS) labels to a respective outgoing interface of each of the plurality of network nodes; and outputting, by the centralized controller, one or more control messages for configuring the network node, wherein the control messages are encapsulated within a label stack comprising the allocated plurality of labels. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A centralized controller comprising:
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one or more physical interfaces configured to receive a discover message originating from a network node, wherein the discover message includes an intermediate node list that specifies a plurality of network nodes the discover message traversed from the network node to an edge node; a path computation module configured to determine, based on the plurality of nodes specified by the discover message, a path from the edge node to the network node; and a path provisioning module configured to allocate each of a plurality of Multi-protocol Label Switching (MPLS) labels to a respective outgoing interface of each of the plurality of network nodes, wherein the one or more physical interfaces are configured to output one or more control messages for configuring the network node, wherein the control messages are encapsulated within a label stack comprising the allocated plurality of labels, and wherein the one or more physical interfaces are configured to receive one or more control messages from the network node. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A non-transitory computer-readable medium storing instructions that when executed cause one or more processors of a centralized controller to:
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receive a discover message originating from a network node, wherein the discover message includes an intermediate node list that specifies a plurality of network nodes the discover message traversed from the network node to an edge node; determine, based on the plurality of nodes specified by the discover message, a path from the edge node to the network node; allocate each of a plurality of Multi-protocol Label Switching (MPLS) labels to a respective outgoing interface of each of the plurality of network nodes; and output one or more control messages for configuring the network node, wherein the control messages are encapsulated within a label stack comprising the allocated plurality of labels.
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Specification