System Management
7950 SR OS Basic System Configuration Guide
Page 313
Configuring System Monitoring Thresholds
Creating Events
The
event
command controls the generation and notification of threshold crossing events
configured with the
alarm
command. When a threshold crossing event is triggered, the
rmon
event
configuration optionally specifies whether an entry in the RMON-MIB log table be created
to record the occurrence of the event. It can also specify whether an SNMP notification (trap) be
generated for the event. There are two notifications for threshold crossing events, a rising alarm
and a falling alarm.ping-address
Creating an event entry in the RMON-MIB log table does not create a corresponding entry in the
event logs. However, when the event is set to trap the generation of a rising alarm or falling alarm
notification creates an entry in the event logs and that is distributed to whatever log destinations
are configured: console, session, memory, file, syslog, or SNMP trap destination. The logger
message includes a rising or falling threshold crossing event indicator, the sample type (absolute
or delta), the sampled value, the threshold value, the
rmon-alarm-id
, the associated
rmon-event-id
and the sampled SNMP object identifier.
The
alarm
command configures an entry in the RMON-MIB alarm table. The
alarm
command
controls the monitoring and triggering of threshold crossing events. In order for notification or
logging of a threshold crossing event to occur there must be at least one associated
rmon event
configured.
The agent periodically takes statistical sample values from the MIB variable specified for
monitoring and compares them to thresholds that have been configured with the
alarm
command.
The
alarm
command configures the MIB variable to be monitored, the polling period (interval),
sampling type (absolute or delta value), and rising and falling threshold parameters. If a sample
has crossed a threshold value, the associated ‘event’ is generated.
Preconfigured CLI threshold commands are available. Preconfigured commands hide some of the
complexities of configuring RMON alarm and event commands and perform the same function. In
particular, the preconfigured commands do not require the user to know the SNMP object
identifier to be sampled. The preconfigured threshold configurations include memory warnings
and alarms and compact flash usage warnings and alarms.
To create events, use the following CLI:
Example
:
config>system>thresholds# cflash-cap-warn cf1-B: rising-
threshold 2000000 falling-threshold 1999900 interval 240 trap startup-
alarm either
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Страница 502: ...Index Page 502 7950 SR OS Basic System Configuration Guide system parameters 252 system time elements 256 timing 294...