Juniper Networks MX240 Troubleshooting Hardware Components, Overview of Troubleshooting Resources

Chapter 12

Troubleshooting Hardware Components

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

Overview of Troubleshooting Resources

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

Juniper Networks Technical Assistance Center

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.

Command-Line Interface

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.

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