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Chapter 9
Configuring and Monitoring Alarms
Alarms on a J-series Services Router alert you to conditions on a network interface,
on the router chassis, or in the system software that might prevent the router from
operating normally. You can set the conditions that trigger alarms on an interface.
Chassis and system alarm conditions are preset.
An active alarm lights the ALARM LED on the front panel of the router. You can
monitor active alarms from the J-Web interface or the CLI.
This chapter contains the following topics. For more information about alarms, see
the JUNOS System Basics Configuration Guide.
■ Alarm Terms on page 165
■ Alarm Overview on page 166
■ Before You Begin on page 172
■ Configuring Alarms with a Configuration Editor on page 172
■ Checking Active Alarms on page 174
■ Verifying the Alarms Configuration on page 175
Alarm Terms
Before configuring and monitoring alarms on Services Routers, become familiar with
the terms defined in Table 88 on page 165.
Table 88: Alarm Terms
DefinitionTerm
Signal alerting you to conditions that might prevent normal operation. On a Services Router, the
alarm signal is the yellow ALARM LED lit on the front of the chassis.
alarm
Failure event that triggers an alarm.alarm condition
Seriousness of the alarm. The level of severity can be either major (red) or minor (yellow).alarm severity
Predefined alarm triggered by a physical condition on the router such as a power supply failure,
excessive component temperature, or media failure.
chassis alarm
Alarm Terms ■ 165