Viewing History Alarms
You can view all SNMP alarms, in the Web interface's Alarms History table, that have been raised (active alarms) as well as cleared (resolved). One of the benefits of this is that you can view alarms that may have been raised and then cleared on a continuous basis. For example, such an alarm may be raised due to an Ethernet cable that is not securely attached to the device's Ethernet port, causing the Ethernet link to be sometimes up and sometimes down. This alarm would not be listed in the Active Alarms table due to it being cleared.
The alarms in the table are displayed from newest to oldest. In other words, the most recently raised alarm is shown first in the list. The table displays both the cleared alarm and the alarm for which it was cleared adjacent to one another, as shown in the figure below for alarms #8 and #9.
To configure the maximum number of alarms that can be displayed in the table, use the [AlarmHistoryTableMaxSize] parameter. If the maximum is reached and a new alarm is added to the table, the oldest alarm is removed from the table to accommodate the new alarm.
If the device is in High Availability (HA) mode, the table also displays alarms raised by the Redundant device. These alarms are shown in the 'Source' field with the alarm source varbind prefix, "Redundant" (e.g., "Redundant#1/EthernetLink#7"). Alarms raised by the Active device are shown without this source varbind prefix (e.g., Board#1/EthernetLink#7).
| ● | The alarms in the table are deleted upon a device restart (or power off). In other words, all the alarms listed in the Alarms History table occurred from after the last device restart. If you want to store the alarms on the device's flash memory so that they also remain listed after a restart, see Storing Alarms History on Flash. |
| ● | If the device is in HA mode, the Redundant device's alarms in the table are deleted upon an HA switchover or if the device changes from HA to a Standalone device. |
| ● | For more information, refer to the SBC-Gateway Series SNMP Alarm Reference Guide. |
| ➢ | To view history alarms: |
| ■ | Open the Alarms History table (Monitor menu > Monitor tab > Summary folder > Alarms History). |
Alarms History Table Description
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Field |
Description |
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Sequential # |
The number of the alarm. The alarms are numbered sequentially as they are raised by the device. The numbering resets to 1 immediately after a device restart (i.e., the first alarm raised after a restart is assigned the number #1). |
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Severity |
Severity level of the alarm:
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Source |
Component of the device from which the alarm was raised. |
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Description |
Brief description of the alarm. |
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Time |
Date (DD/MM/YYYY) and time (HH:MM:SS) the alarm was raised. |
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Note |
This column is displayed only if you have enabled the device to save alarms to flash memory. For more information, see Storing Alarms History on Flash |
Critical (red)
Major (orange)
Minor (yellow)
Cleared (green)