MPLS Segment Routing over IP
RFC 8663, “MPLS Segment Routing over IP”, is a Proposed Standard document published in December 2019 by X. Xu, S. Bryant, A. Farrel, S. Hassan, W. Henderickx, Z. Li. The canonical text is published by the RFC Editor.
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 packet-specific instructions to be executed on it. SR-MPLS can be leveraged to realize a source-routing mechanism across MPLS, IPv4, and IPv6 data planes by using an MPLS label stack as a source-routing instruction set while making no changes to SR-MPLS specifications and interworking with SR-MPLS implementations.
This document describes how SR-MPLS-capable routers and IP-only routers can seamlessly coexist and interoperate through the use of SR-MPLS label stacks and IP encapsulation/tunneling such as MPLS-over-UDP as defined in RFC 7510.
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 8663 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
- RFC 8662 Entropy Label for Source Packet Routing in Networking Tunnels
- RFC 8664 Path Computation Element Communication Protocol Extensions for Segment Routing
- RFC 8661 Segment Routing MPLS Interworking with LDP
- RFC 8665 OSPF Extensions for Segment Routing
- RFC 8660 Segment Routing with the MPLS Data Plane
- RFC 8666 OSPFv3 Extensions for Segment Routing
- RFC 8659 DNS Certification Authority Authorization Resource Record
- RFC 8667 IS-IS Extensions for Segment Routing