IOSXR201 - Cisco IOS XR Basic Troubleshooting

Networking/Server/Operating Systems
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The Cisco IOS? XR Basic Troubleshooting (IOSXR201) training course is an instructor-led, lab-based, hands-on course that provides the knowledge and skill sets required to perform various basic troubleshooting duties using Cisco IOS XR Software in a typical network environment.

The course teaches the fundamental concepts on which the operating system is based to understand how to troubleshoot problems relating to process failures, stuck processes, high CPU consumption processes, and interprocess communication (IPC) functions. In this course, you learn to interpret log messages and configure exception reporting and logging. Using system commands, you also learn how to monitor interfaces and controllers, and troubleshoot traffic flow issues through both Cisco Carrier Routing System (CRS-1) routers and the Cisco XR 12000 Series Router.


You should have the following knowledge and skills before attending this course:

  • Completion of the Introduction to Cisco IOS XR (IOSXR100) Training course or equivalent hands-on experience configuring and supporting Cisco IOS XR-based routers
  • Basic knowledge of the architecture and operations of the Cisco Carrier Routing System (CRS-1), Cisco IOS XR 12000 Series Router, or Cisco ASR 9000 Series Routers
  • Fundamental knowledge of Cisco IOS XR configuration and operation
  • Basic knowledge of problem determination techniques and experience troubleshooting Cisco IOS XR routers in a large network environment

Recommended Prerequisites:

  • Knowledge of general routing concepts
  • Experience working with command-line interface (CLI)-based network devices

Who Should Attend

This course is intended for network professionals (including designers, implementers), network operations center (NOC) personnel, and support staff who are involved with the deployment and troubleshooting of Cisco routers that run the Cisco IOS XR Software operating system.


Module 1: Cisco IOS XR Software Operations

  • Examining Operation Basics
  • Examining Configuration Operations
  • Examining Configuration Rollback and Recovery
  • Examining Process Management

Module 2: Monitoring Processes

  • Processes, Threads, and Dynamic Link Libraries
  • Mandatory Processes
  • CPU Hog Condition
  • Process Crashes
  • Stuck Processes
  • Useful Commands for Debugging Processes
  • Restart of Processes
  • Process Monitoring
  • Identifying Memory Problems
  • Memory Depletion

Module 3: Error Messages and Core Dumps

  • System Error Messages
  • Logging System Messages
  • Cisco IOS XR Core Dumps

Module 4: Cisco Traffic Flow Troubleshooting

  • Troubleshooting Cisco IOS XR Line Card Data Packet Flow
  • Troubleshooting Cisco IOS XR Switch Fabric

Lab Outline

Lab 1: Making and Testing Configuration Changes

    Task 1: Making Configuration Changes

Lab 2: Configuration Commit and Rollback

    Task 1: Commit and Rollback Features

Lab 3: Process Management

    Task 1: Process Restartability

Lab 4: Monitoring Processes

    Task 1: Monitoring Processes

Lab 5: Monitoring a Routing Protocol Process Restart

    Task 1: Monitoring a Routing Protocol Process Restart

Lab 6: Monitoring Memory

    Task 1: Monitoring Memory

Lab 7: Working with System Log Messages

    Task 1: Working with System Log Messages

Lab 8: Core Dumps

    Task 1: Working with Core Dumps

Lab 9: Tracing Packets on the Line Card

    Task 1: Tracing Packets on the Line Card

Lab 10: Tracing Cell Flow

    Task 1: Tracing Cell Flow