Alarm Devices And Messages; Understanding Alarm Types And Severity Classes On Mx104 Routers; Table 18: Alarm Terms - Juniper MX104 Hardware Manual

MX104 3D Universal Edge Router Hardware Guide

Alarm Devices and Messages

Related
Documentation

Understanding Alarm Types and Severity Classes on MX104 Routers

80
For more information about component and front panel LEDs, see
on page 23.
When a major or minor alarm occurs, it logs the cause of the alarm. If the alarm relay
contact is connected to alarm devices, the router also trips the corresponding alarm relay
contact.
To view a detailed description of the alarm cause, issue the
user@host> show chassis alarms
Understanding Alarm Types and Severity Classes on MX104 Routers on page 80
Verifying Active Alarms on MX104 Routers on page 81
Monitoring System Log Messages on MX104 Routers on page 82
Before monitoring alarms on the router, become familiar with the terms defined in
Table 18 on page 80.

Table 18: Alarm Terms

Term Definition
alarm Signal alerting you to conditions that might prevent normal operation. On
a router, the alarm signal is the red system LED lit on the front of the
chassis.
alarm condition Failure event that triggers an alarm.
alarm severity Seriousness of the alarm. The level of severity can be either major (steady
red) or minor (blinking red).
chassis alarm Predefined alarm triggered by a physical condition on the router or one of
the router components. Alarms may be triggered by events such as a power
failure, excessive component temperature, or media failure. Chassis alarms
are preset and cannot be modified.
system alarm Predefined alarm triggered by a missing rescue configuration or failure to
install a license for a licensed software feature. System alarms are preset
and cannot be modified, although you can configure them to appear
automatically in the J-Web interface display or CLI display.
interface alarm Predefined alarm triggered by a problem with a specific network interface.
"MX104 LEDs Overview"
command:
show chassis alarms
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