How to install SNMP monitoring for Datapath Systems

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This document provides guidance on configuring SNMP traps for Datapath systems (VSN, VSN Micro and iolite) to monitor Datapath software (Wall Monitor, Wall Control, Wall Monitor Server).

Installing the SNMP Trap Provider

The SNMP Trap Provider is the service that generates traps. It is not installed by default by a Windows installation. To install the provider the following steps must be followed:

1. From the Control Panel, select Programs.

2. Under Programs and Features, select Turn Windows features on or off.

3. In the Windows features list, scroll down to Simple Network Management Protocol (SNMP) and expand the list so that you can see WMI SNMP Provider.

Installing the SNMP Trap Provider


4. Select the check box for WMI SNMP Provider. The check box for SNMP feature is selected automatically because the provider requires SNMP.

5. Click OK.


Registering a Remote Workstation

Having installed the trap provider, you must now register the machine to which it is going to send any traps. To register a remote machine you must use the Services configuration program, which is available in the Administrative Tools on the Control Panel.

1. Open the Services control program from the Control Panel (or type services.msc in the Start Menu).

2. Select SNMP Service from the list of services and double click on it.

3. On the resulting Dialog box go to the Traps tab.

4. Go to Community name edit box and insert a name to describe the connection. E.g. public.

Registering a Remote Workstation

5. Press Add to List button.

6. The Add button is now enabled. Press this button. An SNMP configuration dialog will appear.

7. Enter the Host Name or IP Address of the trap destination. Click Add.


Setting Up the Event Traps

The final step is the setup the Events logged by our applications that are translated to Traps. We can do this through the program evntwin.exe which is a Windows component.

1. From a command prompt or the Start menu, type in and run evntwin.exe.

2. This will display a list of currently configured traps. Select the Custom configuration type, and the Edit >> button will become active. Select this.

3. The Application drop down contains a list of applications that are registered with the Event Viewer to provide events. This will include Datapath software (e.g. Wall Control, Wall Monitor)

4. Select an application and the Events List will be populated with the events that can be generated by the application.

5. Select an event from the Events List that you would like to translate to a trap. Click the Add button, and a dialog box will be displayed describing the Trap. If you are happy with its configuration click Ok to add it to the translation list.

6. To complete the changes click Apply changes on the translator dialog.

Setting Up the Event Traps

Adding the event in the dialog box above would trigger a trap if Wall Monitor were ever to generate a Red Alert and shut the system down. This might occur if the fans failed and the temperature rose to a critical level.


Trap MIB

The SNMP TRAPS will all be generated using the Microsoft's private enterprise MIB branch. This MIB uses the prefix (RFC1155-SMI).

Traps will be generated to the specified hosts configured using the SNMP services. An application (MIB Browser/trap receiver) will be required which is capable of receiving traps.

Windows uses the Application Name as the OID. All OID's for Microsoft, begins with After that, 13.1 shows the evntwin definition traps (i.e.

After that, the application definition begins. The next digit defines the number of characters in the application name., followed by the Application Name using ASCII characters. So, if we are talking about the application (source) WMONSVC, the number of characters would be 7 and thus we would have:



Testing SNMP Traps

There are a number of SNMP utilities on the market. Any utility that has a built in trap receiver can be used. For the purposes of development and testing, we recommend using the Trap Receiver program that forms part of the MIB Browser suite from iREASONING.

Once traps have been configured on the Wall Controller, the Trap Receiver should be run on the remote machine to log any received traps. For testing purposes, it is useful to enable a few ‘informational’ traps such as the traps for ‘application started’ and ‘application terminated’ as these are easy to trigger (by closing and opening the relevant program) and verify in the Trap Receiver.

Testing SNMP Traps

Once traps have been fully tested, they can be rolled into any existing enterprise wide monitoring system such as Solarwinds, Nagios or any other SNMP monitoring tool. To widen the scope of monitoring, SNMP traps can also be created for other software and tools installed on the machine, or from error logs generated by the operating system itself.


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