Junos Troubleshooting (JT) – Outline

Detailed Course Outline

DAY 1

1 Course Introduction

2 Junos Product Families

  • Describe the architectural philosophy of devices that run the Junos OS and understand how this relates to troubleshooting
  • Describe traffic processing for transit and exception traffic
  • Describe the function and components of the RE and PFE within a device running the Junos OS
  • Describe FRUs
  • Describe current Junos product families and understand where to go for detailed information about your hardware

Lab 1: Identifying Hardware Compon

3 Troubleshooting Toolkit

  • Describe various tools that can be used to troubleshoot devices that run the Junos operating system
  • Explain JTAC recommendations for current bestpractices that facilitate troubleshooting

Lab 2: Using Monitoring Tools and Establishing a Baseline

4 Hardware and Environmental Conditions

  • Describe the key commands and features used to monitor storage and memory issues
  • Describe the key commands and features that you can use to monitor software installations
  • Determine how to find potential hardware problems using system logs
  • Describe the key commands that you can use to monitor hardware and environmental issues

Lab 3: Monitoring Hardware and Environmental Conditions

5 Control Plane

  • Monitor and troubleshoot system processes that reside in the control plane
  • Utilize a logical approach to troubleshooting routing issues that reside in the control plane
  • Monitor and troubleshoot basic bridging and ARP functionalities

Lab 4: Control Plane Monitoring and Troubleshooting

6 Control Plane Protection

  • Describe DDoS attacks
  • Explain and configure the DDoS protection feature
  • Outline using firewall filters to protect the control plane

Lab 5: Protecting the Control Plane

DAY 2

7 Data Plane: Interfaces

  • Describe physical and logical interface properties
  • Deactivate and disable interfaces
  • Perform loopback testing
  • Use operational mode commands to monitor and troubleshoot Ethernet interfaces

Lab 6: Monitoring and Troubleshooting Ethernet Interfaces

8 Data Plane: Other Components

  • Recognize data plane problems and components
  • Monitor and troubleshoot data plane forwarding
  • Monitor load balancing
  • Troubleshoot firewall filter and policer issues

Lab 7: Isolating and Troubleshooting PFE Issues

9 Staging and Acceptance Testing

  • • Perform a Junos device initial inspection and power-on
  • • Perform general system checks recommended for a newly deployed Junos device
  • • Determine the status of new interface connections by performing loopback testing and monitoring

10 Troubleshooting Network Services

  • Discuss DNS, DHCP, NTP, SSH, SNMP, and telemetry
  • Explain authentication issues
  • Discuss MACsec issues
  • Discuss LLDP issues

Lab 8: Troubleshooting Network Services

11 Troubleshooting High Availability Features

  • Discuss LACP, BFD, NSR, and NSB issues
  • Explain graceful routing engine switchover
  • Explain graceful restart
  • Discuss Aggregated Ethernet issues
  • Discuss MC-LAG issues
  • Discuss VRRP issues

12 Network Monitoring

  • Explain how to configure and monitor SNMP
  • Discuss how to configure and monitor RMON
  • Describe how to use the Junos telemetry interface
  • Describe how to use flow monitoring

Lab 9: Monitoring the Network

A Appendix: Junos RPM

  • Explain the purpose of the Junos RPM
  • Describe the components of the Junos RPM
  • Implement Junos RPM Probes
  • Monitor the deployed Probes