Juniper Networks M10i 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 Support” on page xxiv.

■Overview of Troubleshooting Resources on page 79

■Troubleshooting the CFEB on page 83

■Troubleshooting the Fan Tray on page 84

■Troubleshooting PICs on page 84

■Troubleshooting the Power System on page 85

Overview of Troubleshooting Resources

This section provides an overview of the resources you can use while troubleshooting problems with the router:

■Command-Line Interface on page 79

■LEDs on page 80

■Hardware and Interface Alarm Messages on page 80

■Juniper Networks Technical Assistance Center on page 83

Command-Line Interface

The JUNOS Internet software command-line interface (CLI) is the primary tool for controlling and troubleshooting router hardware, the JUNOS Internet 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.

You enter CLI commands on one or more external management devices connected to the Routing Engine through ports on the Routing Engine. The port labeled AUX/MODEM attaches the Routing Engine to a laptop, modem, or other auxiliary device, the port labeled CONSOLE attaches to a system console, and the port labeled MGMT attaches to a management LAN. For more information, see “Routing Engine Interface Ports” on page 16.

Overview of Troubleshooting Resources ■ 79