The Implementing Segment Routing on Cisco IOS XR (SEGRTE201) v2.0 course covers the fundamental concepts of Segment Routing (SR), how to configure and verify segment routing within an Interior Gateway Protocol (IGP), and the interworking of Label Distribution Protocol (LDP) with segment routing. You will learn how to implement Topology-Independent Loop-Free Alternate (TI-LFA) using segment routing, and how to instantiate and verify segment routing traffic engineering policies. You will also learn how to implement segment routing within Border Gateway Protocol (BGP).


* Actual course outline may vary depending on offering center. Contact your sales representative for more information.

Learning Objectives

After taking this course, you should be able to:
- Describe the key concepts of segment routing
- Implement and verify IGP segment routing
- Migrate an existing Multiprotocol Label Switching (MPLS) LDP-based network to segment routing
- Implement and verify TI-LFA segment routing
- Instantiate segment routing policies
- Instantiate multidomain segment routing policies
- Configure and verify BGP prefix segments and SR-based services

  • Introduction to Segment Routing

  • Examining Unified Fabric Routing
    Exploring Segment Routing Concepts
    Examining Segment Types
    Examining the Segment Routing Global Block (SRGB)

  • IGP Segment Routing Implementation and Verification

  • Examining the IGP Control Plane
    Examining SRGB and IGP Interactions
    Examining Prefix and Adjacency SIDs
    Intermediate System to Intermediate System (IS-IS) Multilevel and Open Shortest Path First (OSPF) Multi-Area
    Configuring and Verifying IS-IS SR Operation
    Configuring and Verifying OSPF SR Operation

  • Segment Routing and LDP Interworking

  • SR and LDP Interworking Data Plane
    Mapping Server Function and Configuration
    Interworking Deployment Models

  • Topology Independent - Loop Free Alternate

  • Examining Classic LFA
    Examining TI-LFA Fundamentals
    Implementing and Verifying TI-LFA for SR Traffic
    Implementing and Verifying SR TI-LFA for LDP Traffic
    TI-LFA and SR LDP Interworking

  • Segment Routing Policies - Traffic Engineering (SR-TE)

  • Exploring SR Policies
    Introducing the Anycast and Binding SIDs
    Enabling and Verifying SR Policies
    Instantiating SR Policies
    Instantiating SR Policies using BGP Dynamic

  • Multidomain SR Policies

  • Configuring and Verifying a Path Computation Element (PCE)
    Configuring and Verifying BGP Link-State (LS)
    Configuring Multidomain SR Policies with a PCE
    Configuring Multidomain SR Policies with On Demand Next-Hop (ODN)

  • Segment Routing-Based Services

  • Examining the BGP Prefix-SID Operation
    Configuring and Verifying the BGP Prefix SID
    Examining Egress Peer Engineering
    Examining the BGP Prefix-SID Operation
    SR Flexible Algorithm and Performance Measurement (PM) Delay
    SR-Enabled VPNs


This course is designed for Systems engineers, Network engineers, Field engineers, Technical support personnel, Channel partners and resellers.




This course has no prerequisites, but some basic experience with the Cisco Internetwork Operating System (IOS) XR CLI is helpful.


Length: 4.0 days (32 hours)


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