SR MPLS Tutorials

Whatever your SR MPLS training need, we have you covered

SR concepts

Segment Routing Global Block (SRGB)

See what the Segment Routing Global Block is. Learn about the best practices to use the same SRGB on all segment routing nodes. Further, learn how to modify the Segment Routing Global Block.


Segment Routing IGP Control plane

Learn how to use IS-IS or OSPF to distribute segments, how to configure segment routing and how segment routing works in a multi-area or multi-level network. Further, learn how to verify segment routing advertisements.

Topology Independent LFA (TI-LFA) and uloop avoidance

An introduction to the Topology Independent LFA and micro-loop (uloop) avoidance technology. See how Topology Independent LFA provides a simple, automatic, optimal and topology independent sub-50ms per-prefix protection to the network. Further, see what uloops are and how SR effectively prevents these uloops.

SR and LDP

Segment Routing and LDP co-existence

See how segment routing can co-exist with LDP and other MPLS protocols, both on the control plane and on the data plane. Further learn how to affect a simple migration from LDP to segment routing.

Segment Routing Mapping server

Learn about the objective of the Mapping Server and see how one may configure it. Further, verify the mapping server functionality.

Segment Routing and LDP interworking

Learn about the simple, automatic and seamless interworking between segment routing and LDP. See what the role of the Mapping Server is in the interworking functionality and learn about the interworking functionality on the data plane. Further verify the interworking forwarding entries.

SR Traffic Engineering

Segment Routing Traffic Engineering (SR-TE)

An introduction to the Segment Routing Traffic Engineering (SR-TE) technology. See how SR-TE provides a simple, automated, and scalable architecture to engineer traffic flows in a network. Further, see how the IOS XR based SR Path Computation Element (SR PCE) fits into this architecture.

SR IGP Flexible Algorithm

Flexible Algorithm enriches the SR TE solution by adding additional segments having different properties than the IGP Prefix segments. Flex Algo adds flexible, user-defined segments to the SRTE toolbox. Flex Alg leverages SR on-demand next hop (ODN) and Automated Steering for intent-based instantiation of traffic engineered paths.

SR Operations and Monitoring

Delay Measurement

The Delay Measurement solution, as part of the Performance Monitoring functionality, provides the dynamic measurement of link delays, which can then be distributed in IGP, BGP-LS and/or telemetry, to be used in SRTE path computation.