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IETF - RFC 9085

Border Gateway Protocol - Link State (BGP-LS) Extensions for Segment Routing

inactive, Most Current
Organization: IETF
Publication Date: 1 August 2021
Status: inactive
Page Count: 27
scope:

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.

Document History

RFC 9085
August 1, 2021
Border Gateway Protocol - Link State (BGP-LS) Extensions for Segment Routing
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...

References

This document references:
RFC 9084 - OSPF Prefix Originator Extensions
Published by IETF on August 1, 2021
Abstract This document defines OSPF extensions to include information associated with the node originating a prefix along with the prefix advertisement. These extensions do not change the core OSPF...
This document references:
IETF RFC 5120 - M-ISIS: Multi Topology (MT) Routing in Intermediate System to Intermediate Systems (IS-ISs)
Published by IETF on February 1, 2008
This document describes an optional mechanism within Intermediate System to Intermediate Systems (IS-ISs) used today by many ISPs for IGP routing within their clouds. This document describes how to...
This document references:
IETF RFC 7684 - OSPFv2 Prefix/Link Attribute Advertisement
Published by IETF on November 1, 2015
OSPFv2 requires functional extension beyond what can readily be done with the fixed-format Link State Advertisements (LSAs) as described in RFC 2328. This document defines OSPFv2 Opaque LSAs based on...
This document references:
RFC 9084 - OSPF Prefix Originator Extensions
Published by IETF on August 1, 2021
Abstract This document defines OSPF extensions to include information associated with the node originating a prefix along with the prefix advertisement. These extensions do not change the core OSPF...
This document is referenced by:
RFC 9088 - Signaling Entropy Label Capability and Entropy Readable Label Depth Using IS-IS
Published by IETF on August 1, 2021
Abstract Multiprotocol Label Switching (MPLS) has defined a mechanism to load-balance traffic flows using Entropy Labels (EL). An ingress Label Switching Router (LSR) cannot insert ELs for packets...
This document is referenced by:
RFC 9125 - Gateway Auto-Discovery and Route Advertisement for Site Interconnection Using Segment Routing
Published by IETF on August 1, 2021
Abstract Data centers are attached to the Internet or a backbone network by gateway routers. One data center typically has more than one gateway for commercial, load-balancing, and resiliency...
This document is referenced by:
RFC 9089 - Signaling Entropy Label Capability and Entropy Readable Label Depth Using OSPF
Published by IETF on August 1, 2021
Abstract Multiprotocol Label Switching (MPLS) has defined a mechanism to load-balance traffic flows using Entropy Labels (EL). An ingress Label Switching Router (LSR) cannot insert ELs for packets...
This document is referenced by:
RFC 9086 - Border Gateway Protocol - Link State (BGP-LS) Extensions for Segment Routing BGP Egress Peer Engineering
Published by IETF on August 1, 2021
Abstract A node steers a packet through a controlled set of instructions, called segments, by prepending the packet with a list of segment identifiers (SIDs). A segment can represent any instruction,...
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