Border Gateway Protocol - Link State Extensions for Segment Routing
RFC 9085, “Border Gateway Protocol - Link State Extensions for Segment Routing”, is a Proposed Standard document published in August 2021 by S. Previdi, K. Talaulikar, C. Filsfils, H. Gredler, M. Chen. It has since been updated by RFC 9356. The canonical text is published by the RFC Editor.
Abstract
Segment Routing (SR) allows for a flexible definition of end-to-end paths by encoding paths as sequences of topological subpaths, called "segments". These segments are advertised by routing protocols, e.g., by the link-state routing protocols (IS-IS, OSPFv2, and OSPFv3) within IGP topologies.
This document defines extensions to the Border Gateway Protocol - Link State (BGP-LS) address family in order to carry SR information via BGP.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9085 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
- RFC 9084 OSPF Prefix Originator Extensions
- RFC 9086 Border Gateway Protocol - Link State Extensions for Segment Routing BGP Egress Peer Engineering
- RFC 9083 JSON Responses for the Registration Data Access Protocol
- RFC 9087 Segment Routing Centralized BGP Egress Peer Engineering
- RFC 9082 Registration Data Access Protocol Query Format
- RFC 9088 Signaling Entropy Label Capability and Entropy Readable Label Depth Using IS-IS
- RFC 9081 Interoperation between Multicast Virtual Private Network and Multicast Source Directory Protocol Source-Active Routes
- RFC 9089 Signaling Entropy Label Capability and Entropy Readable Label Depth Using OSPF