Troubleshooting Hardware Components; Overview Of Troubleshooting Resources; Juniper Networks Technical Assistance Center; Command-Line Interface - Juniper MX240 Hardware Manual

Chapter 12

Troubleshooting Hardware Components

Overview of Troubleshooting Resources

Juniper Networks Technical Assistance Center

Command-Line Interface

This chapter describes how to troubleshoot problems with hardware components
installed in the router. If you encounter software problems, or problems with hardware
components not discussed here, contact the Juniper Networks Technical Assistance
Center (JTAC) as described in "Requesting Technical Support" on page xxvii.
Overview of Troubleshooting Resources on page 79
Troubleshooting the Cooling System on page 82
Troubleshooting DPCs on page 83
Troubleshooting the Power System on page 84
This section provides an overview of the resources you can use while troubleshooting
problems with the router:
Juniper Networks Technical Assistance Center on page 79
Command-Line Interface on page 79
Chassis and Interface Alarm Messages on page 80
Alarm Relay Contacts on page 80
LEDs on page 80
If you need assistance during troubleshooting, you can contact the Juniper Networks
Technical Assistance Center (JTAC) by using the Web or by telephone. See "Requesting
Technical Support" on page xxvii.
The JUNOS software command-line interface (CLI) is the primary tool for controlling
and troubleshooting router hardware, the JUNOS software, routing protocols, and
network connectivity. CLI commands display information from routing tables,
information specific to routing protocols, and information about network connectivity
derived from the ping and traceroute utilities.
Overview of Troubleshooting Resources
79