COURSE OBJECTIVE:
• Describe Junos products and related information and recovery options. • Explain various tools that can be used to troubleshoot Junos devices. • Explain Junos CLI commands used in troubleshooting. • Identify and isolate hardware issues. • Troubleshoot problems with the control plane. • Describe control plane protection features. • Troubleshoot problems with interfaces and other data plane components. • Describe the staging and acceptance methodology. • Troubleshoot networking services. • Troubleshoot high availability features. • Describe how to monitor your network with SNMP, RMON, Junos Telemetry Interface, Junos Traffic Vision (formerly known as JFlow), and port mirroring.
TARGET AUDIENCE:
This course is for people who troubleshoot Juniper devices running the Junos OS, which includes network operators, engineers, administrators, support personnel, and reseller support personnel.
COURSE PREREQUISITES:
The prerequisite knowledge includes the following courses, or equivalent knowledge: • Juniper Technical Support Fundamentals • Introduction to the Junos Operating System
COURSE CONTENT:
Day 1Course Introduction
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
Troubleshooting Toolkit
• Describe various tools that can be used to troubleshoot devices that run the Junos operating system
• Explain JTAC recommendations for current best-practices that facilitate troubleshooting Lab 2: Using Monitoring Tools and Establishing a Baseline
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
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
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
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
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
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 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
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 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
Appendix A: Junos RPM
• Explain the purpose of the Junos RPM
• Describe the components of the Junos RPM • Implement Junos RPM Probes • Monitor the deployed Probes
FOLLOW ON COURSES:
Advanced Junos Troubleshooting (AJT)