Designing and Managing Behavior Models - Alarm Actions - SNMP Set -
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SNMP Set

The SNMP Set alarm action enables you to set one or more values in the MIB of an SNMP agent residing on one of your managed nodes. When the transition with which this action is associated occurs, NerveCenter sends an SNMP set request, which includes information you've supplied, to the node where the agent resides.

 
  To add an SNMP Set action to a transition:

1. From the Transition Definition window, select the New Action button.

   A pop-up menu listing all alarm actions is displayed.

2. Select SNMP Set from the pop-up menu.

   The SNMP Set Action window is displayed.

   

3. Enter the destination for the SNMP set request in the Destination Host/IP Address field, or leave the default value, $NODE.

The valid values for this field are:

• $NODE, a variable that contains the node associated with the trigger that caused the alarm transition. For example, if a poll generates the trigger, $NODE contains the name of the node that was polled.
• The name of a node.
• The IP address of a node.

1. Enter a write community string in the Community String field, or leave the default value, $WRITE_COMMUNITY.

   The valid values for this field are:

   • $WRITE_COMMUNITY, a variable containing the write community value associated with the destination node.
   • A community name.
2. Enter a port number in the Port field, or leave the default value, $PORT. This field indicates the port to which the SNMP message will be sent.

   The valid values for this field are:

   • $PORT, a variable containing the port number associated with the destination node. If the node's Port attribute is blank, $PORT represents the value 161.
   • A port number.
3. Build a list of variable bindings to be included in your set request's PDU (protocol data unit). Each variable binding specifies an attribute to be set and the value to which it should be set.

   For each variable binding you want to add to the PDU, perform these steps:

   1. Select a base object from the Base Object list.

      The base object list contains all the base objects referred to in your compiled MIB. Once you select a base object, the attributes of that object are listed in the Attribute list.

   2. Select an attribute from the Attribute list.
   3. Type a value for your attribute in the Attribute Value field.
   4. Specify which instance of the attribute you want to set using the Instance field.

      If the attribute is a zero-instance attribute, NerveCenter automatically supplies the instance (0) when you insert the variable binding into the Variable Binding list. In addition, NerveCenter provides a variable, $I, that you can use to refer to instance information in the poll or trap mask that generated the trigger.

   5. Select the Insert button.

      Your variable binding is appended to the Variable Binding list.

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         The SNMP Set Action dialog also enables you to modify and delete existing variable bindings. Use the Update, Delete, and Delete All buttons for these operations.

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4. Select the OK button in the SNMP Set Action dialog.

   The new action is added to the Actions list in the Transition Definition window.

5. Select the OK button in the Transition Definition window.
6. Select the Save button in the Alarm Definition window.