The Cisco IOS XR Basic Troubleshooting (IOSXR201) v1.0 is a 1-day instructor-led course that introduces learners to the knowledge and skill sets required to perform various basic troubleshooting duties using Cisco IOS XR Software in a typical network environment.

When delivered online, as a virtual-instructor-led training (VILT), the course duration is extended to 2 days.


Upon completing this course, the learner will be able to meet these overall objectives:
  • Understand how to troubleshoot problems relating to process failures, stuck processes, high CPU consumption processes, and interprocess communication (IPC) functions
  • Interpret log messages and configure exception reporting and logging
  • Monitor interfaces and controllers using system commands
  • Troubleshoot traffic flow issues through both Cisco Carrier Routing System (CRS-1) routers and the Cisco XR 12000 Series Router


The course contains these components:
  • Cisco IOS XR Software Operations
    • Examining Operation Basics
    • Examining Configuration Operations
    • Lab: Making and Testing Configuration Changes
    • Examining Configuration Rollback and Recovery
    • Lab: Configuration Commit and Rollback
    • Examining Process Management
    • Lab: Process Management
  • Monitoring Processes
    • Processes, Threads, and Dynamic Link Libraries
    • Mandatory Processes
    • CPU Hog Condition
    • Process Crashes
    • Stuck Processes
    • Useful Commands for Debugging Processes
    • Lab: Monitoring Processes
    • Restart of Processes
    • Lab: Monitoring a Routing Protocol Process Restart
    • Process Monitoring
    • Identifying Memory Problems
    • Memory Depletion
    • Lab: Monitoring Memory
  • Error Messages and Core Dumps
    • System Error Messages
    • Logging System Messages
    • Lab: Working with System Log Messages
    • Cisco IOS XR Core Dumps
    • Lab: Core Dumps
  • Cisco Traffic Flow Troubleshooting
    • Troubleshooting Cisco IOS XR Line Card Data Packet Flow
    • Lab: Tracing Packets on the Line Card
    • Troubleshooting Cisco IOS XR Switch Fabric
    • Lab: Tracing Cell Flow

Prerequisite Knowledge

The knowledge and skills that a learner should possess before attending this course are as follows:
  • Knowledge that can be gained by attending the Introduction to Cisco IOS XR (IOSXR100) 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
  • Knowledge of general routing concepts
  • Experience working with command-line interface (CLI)-based network devices