Hello everyone！
Today, I want to share with you how to query the alarms of the base station.
Before describing how to query alarms, let me briefly introduce alarms.
What is an alarm?
An alarm is generated if the hardware is faulty or a major function fails. Based on the status of the faults, alarms can be classified into active alarms and cleared alarms.
If a fault is cleared, the status of the alarm changes to clear. This type of alarm is called a cleared alarm.
If a fault has not been cleared, the corresponding alarm is an active alarm. This type of alarm is called an active alarm.
NOTE
You can search a database for cleared alarms.
If an alarm is cleared after you switch from the alarm query page to another page, the information about this alarm is not displayed on the alarm query page when you switch back to the alarm query page because alarms will be updated and cleared alarms will not be displayed on the page.
Based on the engineering status of the NE that reported an alarm, the alarm can be an engineering alarm or a normal alarm.
If the NE is being installed, tested, upgraded, or expanded or is in the normal service operation state, the NE is in the engineering state.
The following are engineering alarms: alarms reported by equipment (including physical or logical equipment) that has been configured in engineering state, alarms generated by the peer equipment and associated with alarms reported by the equipment that has been configured in engineering state, and cleared alarms corresponding to engineering alarms.
This is a brief introduction to alarms. Next, I will describe how to query alarm information.
How to query base station alarms?
You can run the LST ALMLOG command to query alarm logs.
Use this command to list historical alarms in the system, including event alarms and cleared and active fault alarms.
The sync serial numbers (SSNs) of alarms specify the sequence in which the alarms are reported to the EMS.
The serial numbers (CSNs) of alarms are arranged by time when the alarms are generated. The CSN is the only index for an alarm in alarm logs, and it remains unchanged throughout the process of generating, clearing, and changing the alarm.
Things to note
The alarms queried by the LST ALMLOG command can be displayed in ascending or descending order of the CSN.
There could be a delay between the actual alarm generated time (displayed in the LST ALMLOG command output) and the time when the alarm is reported to the EMS. The delay may be caused by the mechanism of filtering out intermittent alarms, alarm correlation, duration-based alarm filtering rule, and times-based alarm filtering rule.
If SSNs are not specified, the result is as follows: For an alarm that is cleared, only the alarm clearing information is displayed; for an alarm that is not cleared, the alarm generating and changing information is displayed. If SSNs are specified, the NE reports two records for an alarm, one for alarm generating and one for alarm clearing.
The following date and time rules apply: If the start time is specified but the start date is not, the earliest date in the log is taken as the start date. If the end time is specified but the end date is not, the current date is taken as the end date. If the start date is specified but the start time is not, 0:0:0 is taken as the start time. If the end date is specified but the end time is not, 23:59:59 is taken as the end time. The start date and time must not be later than the end date and time.
The alarm raised time includes the time when the alarms are first raised and the time when the alarms are changed.
When alarm logs are queried by Start Raised Date, End Raised Date, Start Raised Time, and End Raised Time, the query result is alarms whose first raised time or last change time is within the specified time range.
When alarm logs are queried by Start Cleared Date, End Cleared Date, Start Cleared Time, and End Cleared Time, the query result is alarms whose cleared time is within the specified time range.
When alarm logs are queried by Start Raised Date, End Raised Date, Start Raised Time, End Raised Time, Start Cleared Date, End Cleared Date, Start Cleared Time, and End Cleared Time, the query result is alarms whose raised time is within the specified raised time range, and whose cleared time is within the specified cleared time range.
Start Cleared Date, End Cleared Date, Start Cleared Time, and End Cleared Time are invalid for event alarms.
The latest records are preferentially displayed in query results.
Figure 1 Alarm query result
As shown in Figure 1, you can run the command to query the alarm code and name, and then find the solution.
This is the method of querying base station alarms. Welcome to read and comment.
