 | Copyright © 2009, Juniper Networks, Inc. All rights reserved. Trademark Notice. | |
The SNMP health monitor feature uses existing SNMP remote monitoring (RMON) alarms and traps to monitor a select set of Services Router characteristics (object instances) like the CPU usage, memory usage, and file system usage. The health monitor feature also monitors the CPU usage of the device's forwarding process (also called a daemon)—for example, the chassis process and forwarding process microkernel. You can configure the SNMP health monitor options rising threshold, falling threshold, and interval using the SNMP Quick Configuration page.
A threshold is a test of some SNMP variable against some value, with a report when the threshold value is exceeded. The rising threshold is the upper threshold for a monitored variable. When the current sampled value is greater than or equal to this threshold, and the value at the last sampling interval is less than this threshold, the SNMP health monitor generates an alarm. After the rising alarm, the health monitor cannot generate another alarm until the sampled value falls below the rising threshold and reaches the falling threshold.
The falling threshold is the lower threshold for the monitored variable. When the current sampled value is less than or equal to this threshold, and the value at the last sampling interval is greater than this threshold, the SNMP health monitor generates an alarm. After the falling alarm, the health monitor cannot generate another alarm until the sampled value rises above the falling threshold and reaches the rising threshold.
The interval represents the period of time, in seconds, over which the object instance is sampled and compared with the rising and falling thresholds.
At present, you do not have to configure a separate trap for the SNMP health monitor, because it uses the already existing RMON traps. For more information about RMON events and alarms, see the JUNOS Network Management Configuration Guide.
To display the information collected by the SNMP health monitor, use the following CLI show snmp health-monitor commands:
For more information, see the JUNOS System Basics and Services Command Reference.
| Copyright © 2009, Juniper Networks, Inc. All rights reserved. Trademark Notice. | |