Chapter 13 Troubleshooting M120 Hardware Components; Overview Of Troubleshooting Resources For The M120 Router; Troubleshooting Using The Command-Line Interface - Juniper Networks Hardware Manual

CHAPTER 13
Troubleshooting M120 Hardware
Components

Overview of Troubleshooting Resources for the M120 Router

Troubleshooting Using the Command-Line Interface

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Overview of Troubleshooting Resources for the M120 Router on page 117
M120 LED Overview on page 118
Troubleshooting the M120 Cooling System on page 120
Troubleshooting M120 FPCs and CFPCs on page 121
Troubleshooting M120 PICs on page 122
Troubleshooting M120 FEBs on page 122
Troubleshooting an M120 FEB When a Chassis Alarm Is Lit Upon Initial Startup or
Removal on page 124
Troubleshooting the M120 Power System on page 124
Troubleshooting Using the Command-Line Interface on page 117
Troubleshooting Using the Chassis and Interface Alarm Messages on page 118
Troubleshooting Using the Juniper Networks Technical Assistance Center on page 118
The Junos OS command-line interface (CLI) is the primary tool for controlling and
troubleshooting router hardware, the Junos OS, 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
and traceroute utilities.
You enter CLI commands on one or more external management devices connected to
the Routing Engine through ports on the Craft Interface. The port labeled
the Routing Engine to a laptop, modem, or other auxiliary device, the port labeled
CONSOLE attaches to a system console, and the port labeled
management LAN. For more information, see "M120 Routing Engine Description" on
page 18.
ping
attaches
AUX
ETHERNET attaches to a
117