2.2.6 Configuring the AlarmTable
The RMON alarm management function monitors a specified trap variable identified by its OID
at a specified sampling interval. When the monitored variable exceeds the defined threshold, an
alarm is generated.
Context
The RMON alarm management is responsible for monitoring a specified alarm variable
(identified by OID) at a specified sampling interval. An alarm event occurs when the monitored
variable exceeds the defined threshold. Generally, the event is recorded in the log table, or
RMON sends a trap message to the NM Station.
If the events that correspond to the alarm upper limit and lower limit (
event-entry1
,
event-
entry2
) are not configured in the eventTable, an alarm is not generated even if the alarm condition
is satisfied. At this time, the status of alarm recording is undercreation and not VALID.
If an event corresponding to either the alarm upper limit or the alarm lower limit is configured,
an alarm is triggered once the alarm condition is satisfied. (At this time, the status of alarm
recording is VALID.) If an incorrect alarm variable is configured (for example, an inexistent
OID is specified), the status of alarm recording is undercreation and no alarm is generated.
Do as follows on the router that is monitored:
Procedure
Step 1
Run:
system-view
The system view is displayed.
Step 2
Run:
rmon alarm
entry-number
alarm-OID
sampling-time
{
absolute
|
changeratio
|
delta
}
rising-threshold
threshold-value1
event-entry1
falling-threshold
threshold-value2
event-entry2
[
owner
owner-name
]
The alarmTable is configured.
----End
2.2.7 Configuring the PrialarmTable
Compared with AlarmTable, PrialarmTable is enhanced with the function of setting the trap
object through an expression.
Context
Based on the alarmTable in RFC 2819, the RMON prialarm management is enhanced with two
functions: setting the alarm object in the form of expressions and limiting the time to live (TTL)
value of a prialarm entry.
Compared with the alarmTable, the prialarmTable has several additional entries:
l
Expression of alarm variables. It can be an arithmetic expression composed of the OIDs of
alarm var, -, *, / or brackets).
l
Description of the prialarm entry in a character string.
Huawei AR150&200 Series Enterprise Routers
Configuration Guide - Network Management
2 RMON Configuration
Issue 02 (2012-03-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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