![Ericsson 1553-FGC 101 1010 Uen A Handbook Download Page 113](http://html1.mh-extra.com/html/ericsson/1553-fgc-101-1010-uen-a/1553-fgc-101-1010-uen-a_handbook_2423331113.webp)
Alarms
The chassis can report any error condition by generating an alarm event. Alarms are reported on the web page of the chassis, and
can also be reported by the generation of SNMP traps.
Every alarm event type is assigned a severity level, the possible alarm severity levels are: masked, warning, minor, major, and
critical.
If an alarm is masked, the alarm event causes no action.
The highest severity level of any active alarm is indicated by the Alarm LED on the front panel of the chassis. This is red if there are
any active critical alarm, orange if the highest severity active alarm is major, or green if there are no active alarms, or active alarms
or warnings are masked.
Alarm Levels
The health of the system will be signalled by alarm events. An alarm event can be set to one of the following possible levels by the
operator for each of the cards fitted to the chassis.
Alarm Treatment
Alarms are associated with either an option card or the Host. An option card informs the Host of the alarms that it can generate as
part of its capabilities
xml
file. The Host reads this file when the option card is detected.
Alarms are treated as parameters, and are thus stored in the Parameter Store.
If the state of an alarm changes, the source of the alarm, i.e. the option card, or the Host System Manager generates a broadcast
message to the systems internal Alarm IP Port to notify all interested applications of the new state of the alarm. It will also generate
a syslog message so that the event is recorded in the system
log file
.
Alarm Manager
The Alarm Manager application listens on the Alarm Port, and maintains a history of all changes of alarm states, which it can provide
to the web page manager if the alarm history is requested to be displayed.
The Alarm Manager also controls the overall alarm state of the chassis. This is used by both the TTv Health MIB, and the front panel
driver. The overall alarm state can be either, no alarms, warning, or alarm.
SNMP Trap
The SNMP Handler application also listens on the Alarm Port, and if SNMP Trap messages on alarms have been enabled, it will
Alarm
Front Panel
Status LED
Description
Masked
Green
Any change of state of the alarm is logged, but no further action is taken.
Warning
Amber
Any change of state of the alarm is logged. When active, the alarm is reported on the Alarm
Status menu. An SNMP trap may optionally be generated for Warnings.
Minor
Amber
Any change of state of the alarm is logged.
When active, the alarm is reported on the
Alarm Status menu
.
An SNMP trap may optionally be generated for Minor alarms.
Major
Amber
Any change of state of the alarm is logged.
When active, the alarm is reported on the
Alarm Status menu
.
An SNMP trap is generated.
Critical
Red
Any change of state of the alarm is logged.
When active, the alarm is reported on the
Alarm Status menu
.
An SNMP trap is generated.
A control system will assume that the associated option card has failed, and will perform a card
level redundancy switch.
© Ericsson AB 2011. All rights reserved
Page 113 of 153
Cover
9/11/2012
file://C:\Users\ebriacl\AppData\Local\Temp\~hh7DF.htm