Segment routing over label distribution protocol
AssigneeCisco Technology, Inc.
InventorsAhmed R. Bashandy, Clarence Filsfils, David D. Ward
Life of this patent
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Abstract
An apparatus and method is disclosed for segment routing (SR) over label distribution protocol (LDP). In one embodiment, the method includes a node receiving a packet with an attached segment ID. In response, the node may attach a label to the packet. Thereafter, the node may forward the packet with the attached label and segment ID to another node via a label switched path (LSP).
Claims20
A method comprising:
- a node receiving an advertisement from another node;
- the node creating a segment ID stack in response to the node receiving the advertisement;
- the node receiving a packet;
- the node attaching the segment ID stack to the packet, wherein the segment ID stack comprises a first segment ID and a service segment ID, wherein the first segment ID and the service segment ID correspond to the other node and a service provided by the other node, respectively;
- the node forwarding the packet towards the other node after attaching the segment ID stack to the packet.
An apparatus comprising:
- a node configured to receive a first segment ID and a service segment ID from another node in a network of nodes, wherein the first segment ID and the service segment ID correspond to the other node and a service provided by the other node, respectively;
- the node comprising a module for generating a segment ID stack comprising the first segment ID and the service segment ID;
- a node comprising a first interface for receiving a packet;
- the node comprising a module for attaching the segment ID stack to the packet;
- the node comprising a second interface for forwarding the packet towards the other node after attaching the segment ID stack to the packet.
A computer readable memory (CRM) for storing instructions that are executable by a processor in a node, wherein the processor implements a method in response to executing the instructions, the method comprising:
- receiving an advertisement from another node;
- creating a segment ID stack in response to the node receiving the advertisement;
- attaching the segment ID stack to a packet in response to the node receiving the packet at a first interface, wherein the segment ID stack comprises a first segment ID and a service segment ID, wherein the first segment ID and the service segment ID correspond to another node and a service provided by the other node, respectively;
- forwarding the packet towards the other node after attaching the segment ID stack to the packet.
Dependencies are inferred from the claim text.