Juniper Networks M160 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 xxiii.

Overview of Troubleshooting Resources on page 207

Troubleshooting the Cooling System on page 212

Troubleshooting Packet Forwarding Engine Components on page 213

Troubleshooting the Power System on page 215

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 207

LEDs on page 208

Chassis and Interface Alarm Messages on page 209

Blown Fuse Indicators on page 211

Juniper Networks Technical Assistance Center on page 212

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 Connector Interface Panel (CIP). The port labeled AUXILIARY attaches the Routing Engine to a laptop, modem, or other auxiliary device, the port labeled CONSOLE attaches to a system

Overview of Troubleshooting Resources 207