CHAPTER 18
Troubleshooting Components
•
Troubleshooting Resources for ACX1000 and ACX1100 Routers on page 137
•
Monitoring System Log Messages on page 138
•
Verifying Active Alarms on page 138
•
Understanding Alarm Types and Severity Classes on ACX Series Routers on page 139
Troubleshooting Resources for ACX1000 and ACX1100 Routers
•
Command-Line Interface on page 137
•
Front Panel LEDs on page 137
Command-Line Interface
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 ping
and traceroute utilities.
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.
Front Panel LEDs
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 SYS on the right side of the front panel indicates the
status of the router.
•
Management and console port LEDs—Two pairs of LEDs on the front panel indicate
the status of the ports. The ports are labeled MGMT and CONSOLE/AUX.
•
Link LEDs—Each network port has one pair of port LEDs that indicate the status of the
ports.
137Copyright © 2017, Juniper Networks, Inc.
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