Alarm Terms

alarm

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 condition

Failure event that triggers an alarm.

alarm severity

Seriousness of the alarm. The level of severity can be either major (red) or minor (yellow).

chassis alarm

Predefined alarm triggered by a physical condition on the router such as a power supply failure, excessive component temperature, or media failure.

interface alarm

Alarm triggered by the state of a physical link on a fixed or installed Physical Interface Module (PIM), such as a link failure or a missing signal.

Interface alarms are triggered by conditions on a T1 (DS1), Fast Ethernet, serial, or T3 (DS3) physical interface or by conditions on the sp-0/0/0 adaptive services interface for stateful firewall filter, Network Address Translation (NAT), intrusion detection service (IDS), or IP Security (IPSec) services.

To enable an interface alarm, you must explicitly set an alarm condition.

system alarm

Predefined alarm triggered by a missing rescue configuration or failure to install a license for a licensed software feature.