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US 10,764,146 B2Granted
Segment routing over label distribution protocol
AssigneeCisco Technology, Inc.
InventorsAhmed R. Bashandy, Clarence Filsfils, David D. Ward
Life of this patent
Estimating the term…
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 a packet with an attached segment ID stack, wherein the segment ID stack comprises a first segment ID, a second segment ID, and a service segment ID, wherein the first segment ID and the service segment ID correspond to the node and a service provided by the node, respectively, wherein the second segment ID corresponds to another node, and wherein the node and the other node are in a network of nodes;
- the node processing the packet in accordance with the service;
- the node forwarding the packet after it is processed.
An apparatus comprising:
- a first node comprising a first interface for receiving a packet with an attached segment ID stack, wherein the segment ID stack comprises a first segment ID, a second segment ID, and a service segment ID, wherein the first segment ID and the service segment ID correspond to the first node and a service provided by the first node, respectively, wherein the second segment ID corresponds to another node;
- the first node comprising a module for processing the packet in accordance with the service;
- the first node comprising a second interface for forwarding the packet after it is processed in accordance with the service.
A system comprising:
- a first node comprising a first interface for receiving a packet;
- the first node comprising a module for attaching a segment ID stack to the packet, wherein the segment ID stack comprises a first segment ID, a second segment ID and a service segment ID, wherein the first segment ID and the service segment ID correspond to a second node and a service provided by the second node, respectively, and wherein the second segment ID corresponds to a third node;
- the first node comprising a second interface for forwarding the packet towards the second node after the first node attaches the segment ID stack.
Dependencies are inferred from the claim text.