Related Documentation
Understanding Alarm Types and Severity Levels on EX Series Switches
Alarms alert you to conditions that might prevent normal operation of the switch. Before monitoring alarms on a Juniper Networks EX Series Ethernet switch, become familiar with the terms defined in Table 1.
Table 1: Alarm Terms
Term | Definition |
|---|---|
alarm | Signal alerting you to conditions that might prevent normal operation. On a switch, the alarm signal is the ALM LED lit on the front of the chassis. |
alarm condition | Failure event that triggers an alarm. |
alarm severity | Seriousness of the alarm. If the Alarm (ALM) LED is red, this indicates a major alarm. If the Alarm LED is yellow, this indicates a minor alarm. If the Alarm LED is unlit, there is no alarm or the switch is halted. |
chassis alarm | Preset alarm triggered by a physical condition on the switch such as a power supply failure, excessive component temperature, or media failure. |
system alarm | Preset alarm triggered by a missing rescue configuration or failure to install a license for a licensed software feature. Note: On EX6200 switches, a system alarm can be triggered by an internal link error. |
Alarm Types
The switch supports these alarms:
- Chassis alarms indicate a failure on the switch or one of its components. Chassis alarms are preset and cannot be modified.
- System alarms indicate a missing rescue configuration. System alarms are preset and cannot be modified, although you can configure them to appear automatically in the J-Web interface display or the CLI display.
Alarm Severity Levels
Alarms on switches have two severity levels:
- Major (red)—Indicates a critical situation on
the switch that has resulted from one of the following conditions.
A red alarm condition requires immediate action.
- One or more hardware components have failed.
- One or more hardware components have exceeded temperature thresholds.
- An alarm condition configured on an interface has triggered a critical warning.
-
Minor (yellow or amber)—Indicates a noncritical
condition on the switch that, if left unchecked, might cause an interruption
in service or degradation in performance. A yellow alarm condition
requires monitoring or maintenance.
A missing rescue configuration generates a yellow system alarm.
