Segment Routing MPLS Interworking with LDP
RFC 8661, “Segment Routing MPLS Interworking with LDP”, is a Proposed Standard document published in December 2019 by A. Bashandy, C. Filsfils, S. Previdi, B. Decraene, S. Litkowski. The canonical text is published by the RFC Editor.
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, topological or service based. SR allows enforcing a flow through any topological path while maintaining per-flow state only at the ingress node to the SR domain.
The Segment Routing architecture can be directly applied to the MPLS data plane with no change in the forwarding plane. This document describes how Segment Routing MPLS operates in a network where LDP is deployed and in the case where SR-capable and non-SR-capable nodes coexist.
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 8661 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
- RFC 8660 Segment Routing with the MPLS Data Plane
- RFC 8662 Entropy Label for Source Packet Routing in Networking Tunnels
- RFC 8659 DNS Certification Authority Authorization Resource Record
- RFC 8663 MPLS Segment Routing over IP
- RFC 8658 RADIUS Attributes for Softwire Mechanisms Based on Address plus Port
- RFC 8664 Path Computation Element Communication Protocol Extensions for Segment Routing
- RFC 8657 Certification Authority Authorization Record Extensions for Account URI and Automatic Certificate Management Environment Method Binding
- RFC 8665 OSPF Extensions for Segment Routing