Troubleshooting Components; Troubleshooting Resources For Mx104 Routers; Command-Line Interface; Front Panel Leds - Juniper MX104 Hardware Manual

CHAPTER 26

Troubleshooting Components

Troubleshooting Resources for MX104 Routers

Command-Line Interface

Front Panel LEDs

Copyright © 2017, Juniper Networks, Inc.
Troubleshooting Resources for MX104 Routers on page 197
Understanding Alarm Types and Severity Classes on MX104 Routers on page 198
Verifying Active Alarms on MX104 Routers on page 199
Monitoring System Log Messages on MX104 Routers on page 200
Command-Line Interface on page 197
Front Panel LEDs on page 197
Alarm Devices and Messages on page 198
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 utilities.
traceroute
You enter CLI commands on one or more external management devices connected to
ports on the front panel.
For information about using the CLI to troubleshoot the Junos OS, see the appropriate
Junos OS configuration guide.
The front panel on the router contains LEDs that allow you to troubleshoot the router.
LEDs on the front panel include the following:
System LED—One LED labeled
router.
Alarm LEDs—One yellow and one red LED on the front panel indicate major and minor
alarms.
on the front panel indicates the status of the
SYS OK
ping
197