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IETF RFC 8667

IS-IS Extensions for Segment Routing

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Organization: IETF
Publication Date: 1 December 2019
Status: active
Page Count: 28
scope:

Abstract

Segment Routing (SR) allows for a flexible definition of end-to-end paths within IGP topologies by encoding paths as sequences of topological sub-paths, called "segments". These segments are advertised by the link-state routing protocols (IS-IS and OSPF).

This document describes the IS-IS extensions that need to be introduced for Segment Routing operating on an MPLS data plane.

Document History

IETF RFC 8667
December 1, 2019
IS-IS Extensions for Segment Routing
Abstract Segment Routing (SR) allows for a flexible definition of end-to-end paths within IGP topologies by encoding paths as sequences of topological sub-paths, called "segments". These segments...

References

This document references:
IETF RFC 8660 - Segment Routing with the MPLS Data Plane
Published by IETF on December 1, 2019
Abstract Segment Routing (SR) leverages the source-routing paradigm. A node steers a packet through a controlled set of instructions, called segments, by prepending the packet with an SR header. In...
This document references:
IETF RFC 8661 - Segment Routing MPLS Interworking with LDP
Published by IETF on December 1, 2019
Abstract A Segment Routing (SR) node steers a packet through a controlled set of instructions, called segments, by prepending the packet with an SR header. A segment can represent any instruction,...
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 5304 - IS-IS Cryptographic Authentication
Published by IETF on October 1, 2008
This document describes the authentication of Intermediate System to Intermediate System (IS-IS) Protocol Data Units (PDUs) using the Hashed Message Authentication Codes - Message Digest 5 (HMAC-MD5)...
This document references:
IETF RFC 8660 - Segment Routing with the MPLS Data Plane
Published by IETF on December 1, 2019
Abstract Segment Routing (SR) leverages the source-routing paradigm. A node steers a packet through a controlled set of instructions, called segments, by prepending the packet with an SR header. In...
This document references:
IETF RFC 8661 - Segment Routing MPLS Interworking with LDP
Published by IETF on December 1, 2019
Abstract A Segment Routing (SR) node steers a packet through a controlled set of instructions, called segments, by prepending the packet with an SR header. A segment can represent any instruction,...
This document is referenced by:
IETF RFC 8679 - MPLS Egress Protection Framework
Published by IETF on December 1, 2019
Abstract This document specifies a fast reroute framework for protecting IP/MPLS services and MPLS transport tunnels against egress node and egress link failures. For each type of egress failure, it...
This document is referenced by:
IETF RFC 8663 - MPLS Segment Routing over IP
Published by IETF on December 1, 2019
Abstract MPLS Segment Routing (SR-MPLS) is a method of source routing a packet through an MPLS data plane by imposing a stack of MPLS labels on the packet to specify the path together with any...
This document is referenced by:
IETF RFC 8664 - Path Computation Element Communication Protocol (PCEP) Extensions for Segment Routing
Published by IETF on December 1, 2019
Abstract Segment Routing (SR) enables any head-end node to select any path without relying on a hop-byhop signaling technique (e.g., LDP or RSVP-TE). It depends only on "segments" that are advertised...
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