1. In the Essentials 2007 console, click the Authoring button.

2. In the Authoring pane, expand Authoring, expand Management Pack Objects, and then click Monitors.

3. Click the Scope button.

4. In the Scope MP Objects by target(s) dialog box, click View all Targets, in the Look for text box, type SNMP Network Device, select the SNMP Network Device target check box, and then click OK.

   Important
   The target must be the SNMP Network Device object type or an object type derived from it.

5. In the Monitors pane, expand SNMP Network Device, expand Entity Health, right-click Availability, point to Create a monitor, and then click Unit Monitor.

6. In the Create Monitor Wizard, on the Select a Monitor Type page, expand SNMP, expand Probe Based Detection, expand Simple Event Detection, click Event Monitor - Single Event and Single Event, and then click Next.

   Note
   You can either select a Management Pack from the Select destination management pack list or create a new unsealed Management Pack by clicking New.

7. On the General Properties page, in the Name box, type a name for the SNMP event unit monitor, and then as an option, you can type a description.

8. In the Parent monitor list, click the appropriate parent monitor, and then click Next.

9. On the First SNMP Probe page:

   1. For Community String, type the community string.
      
      
   2. For Frequency, enter a value for the frequency, and then in the list box, you can leave the default Minutes, or click Seconds, Hours, or Days.
      
      

      Note
      The minimum value for frequency is 30 seconds, and the maximum value is 604,800 seconds (7 days).

   3. Under Object Identifier Properties, type one or more object identifiers, and then click Next.
      
      

10. On the Build Event Expression page, under Filter one or more events, use the columns in the table to build an expression, and then click Next.

11. On the Second SNMP Probe page:

    1. For Community String, type the community string.
       
       
    2. For Frequency, enter a value for the frequency, and then in the list box, you can leave the default Minutes, or click Seconds, Hours, or Days.
       
       

       Note
       The minimum value for frequency is 30 seconds, the maximum value is 604,800 seconds (7 days).

    3. Under Object Identifier Properties, type one or more object identifiers and then click Next.
       
       

12. On the Build Event Expression page, under Filter one or more events, use the columns in the table to build an expression, and then click Next.

13. On the Configure Health page:

    1. For the FirstEventRaised row, click the name in the Display Name column and type a display name for this condition. Click health state in the Health State column, and then click Error, Warning, or Success.
       
       
    2. For the SecondEventRaised row, click the name in the Display Name column and type a display name for this condition. Click health state in the Health State column, and then click Error, Warning, or Success.
       
       

       Note
       One of the two events must be configured to set the health state to Success.

    3. Click Next.
       
       

14. On the Configure Alerts page, set the properties of the alert, and then click Create.

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