For information about using the CLI to troubleshoot the Junos OS, see the appropriate
Junos OS configuration guide.
Troubleshooting Using the Chassis and Interface Alarm Messages
When the Routing Engine detects an alarm condition, it lights the red or yellow alarm
LED on the craft interface as appropriate. To view a more detailed description of the
alarm cause, issue the show chassis alarms CLI command:
user@host> show chassis alarms
There are two classes of alarm messages:
•
Chassis alarms—Indicate a problem with a chassis component such as the cooling
system or power supplies.
•
Interface alarms—Indicate a problem with a specific network interface.
Troubleshooting Using the Juniper Networks Technical Assistance Center
If you need assistance during troubleshooting, you can contact the Juniper Networks
Technical Assistance Center (JTAC) by using the Web or by telephone. See “Contacting
Customer Support” on page 295.
Related
Documentation
M120 Router Description on page 3•
• M120 Router Physical Specifications on page 82
• M120 Router Power Requirements on page 88
M120 LED Overview
•
Craft Interface LEDs on page 284
•
Component LEDs on page 285
Craft Interface LEDs
The craft interface is the panel on the front of the router that displays system status and
allows you to troubleshoot the router. The craft interface is located at the top of the
chassis above the FPC card cage.
For more information about using the craft interface, see “M120 Craft Interface Description”
on page 11.
LEDs on the craft interface include the following:
Copyright © 2018, Juniper Networks, Inc.284
M120 Multiservice Edge Router Hardware Guide
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