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Define SNMP Set Details

Monitor > Define SNMP Set > Edit > SNMP Sets

The SNMP Sets tab enables you to maintain all MIB objects associated with a SNMP set.

Select Page

When more rows of data are selected than can be displayed on a single page, click the and buttons to display the previous and next page. The drop down list alphabetically lists the first record of each page of data.

Add / Edit

Click Add or the edit icon to use a wizard that leads you through the six steps required to add or edit the monitoring of a MIB object.

  1. Add the object/version/instance combination required to retrieve information from a SNMP device.
    • MIB Object - Select the MIB object. Click Add Object to add a MIB object that currently does not exist on the Monitor Lists page.
    • SNMP Version - Select a SNMP version. Version 1 is supported by all devices and is the default. Version 2c defines more attributes and encrypts the packets to and from the SNMP agent. Only select version 2c if you know the device supports version 2c.
    • SNMP Instance - The last number of an object ID may be expressed as a table of values instead of as a single value. If the instance is a single value, enter 0. If the instance is a table of values, enter a range of numbers, such as 1-5,6 or 1,3,7. You can also enter All. An All instance represents all the instances available for an object.

      Note: If you're not sure what numbers are valid for a particular SNMP instance, select a machine ID that has performed a LAN Watch using Monitoring > Assign SNMP. Click the SNMP Info hyperlink for the device you're interested in. This displays all MIB object IDs and the SNMP instances available for the device.

    • Value Returned as - If the MIB object returns a numeric value, you can choose to return this value as a Total or a Rate Per Second.
  2. Optionally change the default MIB object Name and Description.
  3. Select the log data collected. If the returned value is numeric, you can minimize the collection of unwanted log data by setting a narrow range of data values over and under the collection threshold.
    • Collection Operator - For character string return values, the options are Changed, Equal or NotEqual. For numeric return values, the options are Equal, NotEqual, Over or Under.
    • Collection Threshold - Set a fixed value that the returned value is compare to, using the selected Collection Operator, to determine what log data is collected.
    • SNMP Timeout - Specify the number of periods the agent waits for a reply from the SNMP device before giving up. Two seconds is the default.
  4. Specify when a SNMP alarm is triggered.
    • Alarm Operator - For character string return values, the options are Changed, Equal or NotEqual. For numeric return values, the options are Equal, NotEqual, Over, Under or Percent Of.
    • Alarm Threshold - Set a fixed value that the returned value is compared to, using the selected Alarm Operator, to determine when an alarm is triggered.
    • Percent Object - Selecting the Percent Of option for Alarm Operator causes this field to display. Enter another object/version/instance in this field whose value can serve as a 100% benchmark for comparison purposes.
    • Duration - Specify the time the returned values must continuously exceed the alarm threshold to generate the alarm. Many alarm conditions are only alarming if the level is sustained over a long period of time.
    • Ignore additional alarms for - Suppress additional alarms for this same issue for this time period. This reduces the confusion of many alarms for the same issue.
  5. Warn when within X% of alarm threshold - Optionally display a warning alarm in the Dashboard List page when the returned value is within a specified percentage of the Alarm Threshold. The default warning icon is a yellow traffic light icon . See SNMP Icons.
  6. Optionally activate a trending alarm. Trending alarms use historical data to predict when the next alarm will occur.
    • Trending Activated? - If yes, a linear regression trendline is calculated based on the last 2500 data points logged.
    • Trending Window - The time period used to extend the calculated trendline into the future. If the predicted trendline exceeds the alarm threshold within the future time period specified, a trending alarm is generated. Typically a trending window should be set to the amount of time you need to prepare for an alarm condition, if it occurs.
    • Ignore additional trending alarms for - Suppresses additional trending alarms for this same issue during this time period.
    • By default, trending alarms display as an orange icon in the Dashboard List page. You can change this icon using the SNMP Icons tab.
    • Warning status alarms and trending status alarms don't create alarms in the alarm log, but they change the image of the alarm icon in various display windows. You can generate a trending alarm report using Reports > Monitor.

Next

Move the user to the next wizard page.

Previous

  • Move the user back to the previous wizard page.

Cancel

Ignore any changes made to wizard pages and return to the SNMP Sets list.

Save

Save changes made to the wizard pages.