SNMP Collector

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SNMP Collector Monitor Items can collect SNMP OID values from systems being monitored by an ELM Agent. Data can be collected based on one or more OIDs.

•	The SNMP Collector requires the Windows SNMP and SNMP Trap services.

The SNMP Collector Monitor Item operates by polling the device at a scheduled interval and then writes this data to the ELM database.

Reference Information

SNMP Collectors behave like Performance Collectors. Performance Collectors query monitored Windows servers for defined statistics and return that data to the ELM Primary Database. An SNMP Collector's job is to collect the data provided by an SNMP Agent An SNMP Agent is not one of the ELM Agent types. It is part of the SNMP protocol and exposes management data on the managed system. using the Simple Network Management Protocol and deliver the records to the ELM Server.

SNMP Collector

Displays the OID, Translated Name, and the Community fields. An SNMP community string is a text string that acts as a password. It is used to authenticate messages that are sent between the management station (the SNMP manager) and the device (the SNMP agent). The community string is included in every packet that is transmitted between the SNMP manager and the SNMP agent. After receiving an SNMP request, the SNMP agent compares the community string in the request to the community strings that are configured for the agent.

•	The Add OIDs button opens the SNMP OID Selector window. This window provides the opportunity to select specific OIDs to monitor. OIDs may be browsed from a server or from a MIB file.

•	The Show OIDs button on the From Server tab queries the specified Host Computer and Community for SNMP OIDs and values.

•	The Restore Defaults button resets the From Server tab to the original settings.

•	The Add button on the From MIB tab provides the ability to browse to a MIB file located elsewhere and add it to the list of MIB files available.

•	The Remove button on the From MIB tab removes selected MIB files from the available list.

•	The Translate MIB button on the From MIB tab converts the MIB file into the hierarchical tree format for browsing and selection of specific OIDs.

•	The Remove button will delete any selected OIDs from the Collector window.

MIB Files

During install, Windows copies a compiled MIB library called MIB.bin into the system32 directory. This file provides OID-to-name translation for a portion of the OID namespace tree. It does not generally include the namespace used by third-party SNMP agents. ELM can read vendor-provided MIB files and add to the namespace provided by the Windows SNMP service. When ELM is installed, it creates a MibFiles sub-directory for third-party MIB files. Place the vendor-supplied MIB file in the MibFiles folder, and use the MIB Files browser to select them. The Add button on the From MIB tab is used to browse to the vendor-supplied MIB file.

Categories

Displays the Agent Categories to which the Monitor is assigned. Click to select or deselect Agent Categories. Right click to create or edit Agent Categories.

Test Monitor

Test any Monitor Item against any Agent capable of running the Item using the drop-down and Test button on this dialog box. Testing a Monitor Item prior to putting it into production validates that the monitor item is configured properly. To test a monitor item:

1.	Select the Agent you wish to test against from the drop-down list.

2.	Click the Start Test button.

If the test was successful, you will receive a pop-up indicating this and the option to see detailed results of the test. If the test failed, detailed results of the test will automatically open in Notepad.

Schedule

Displays the Scheduled Interval and Scheduled Hours settings which control the frequency for the Monitor Item.

Scheduled Interval tab

Specify the interval at which the monitoring, polling or action is to occur. Depending on the Monitor Item type, Items can be scheduled in interval increments of Seconds, Minutes, Hours and Days. The Scheduled Interval is relative to the top of the hour or top of the minute. For example, if a Scheduled Interval is configured for 10 minutes, the Monitor Item will execute at hh:10:00, hh:20:00, hh:30:00, hh:40:00, hh:50:00, hh:00:00, etc. If a Scheduled Interval is configured for 15 seconds, the Monitor Item will execute at hh:00:15, hh:00:30, hh:00:45, hh:00:00, hh:01:15, etc.

Scheduled Hours tab

Select the days and/or hours this item is active. By default, the schedule is set to ON for all hours and all days. Mouse clicks toggle squares between ON and OFF. Clicking on an individual square will toggle the active schedule for that hour. Clicking on an hour at the top of the grid, or on a day of the week at the left of the grid will toggle the corresponding column or row. Keyboard equivalents are the arrow keys and the space bar.

Properties Tab

This read-only tab displays the properties of the selected object and the values for those properties.