Designing and Managing Behavior Models - Configuring SNMP Settings for Nodes - Manually Changing the SNMP Version Used to Manage a Node -
Configuring SNMP Settings for Nodes      Changing the Security Level of an SNMP v3 Node

Manually Changing the SNMP Version Used to Manage a Node

NerveCenter must use different SNMP protocols to communicate with the different versions of SNMP agents. Most often, you will want NerveCenter to classify the SNMP version for nodes when they are added to your database. You can, however, manually change the version that NerveCenter uses for communicating with a particular node.

You might want to change the version manually, for example, if the node supports SNMP versions v1, v2c, and v3, and the version currently assigned -say it's SNMP v3 -- is not configured correctly at the agent. Rather than continue sending SNMP v3 polls that may generate numerous alarms, you can temporarily change the node's SNMP version to v2c (which is supported on the node) until you have a chance to reconfigure the v3 information at the agent. With this change, you can still poll the node for certain MIB variables defined in your behavior models and continue monitoring minimal MIB information for the node.

This feature also provides a way to override the maximum version classification value configured in NerveCenter Administrator. For example, say the maximum classification value is v2c, you can specify SNMP v3 for a particular node and run a test poll against that node.

 
  To change a node's SNMP version manually:

1. From the client's Admin menu, select Node List.

   The Node List window is displayed.

   

2. In the Node List window, select New if defining a new node, or select the node and then Open to change an existing node.

   The Node Definition window appears.

3. Select the SNMP tab.

   

4. Select the node's SNMP version from the SNMP Version list box.

   Remember that if you select Unknown or a version that's incorrect, NerveCenter can not poll the node or process traps from the node.

5. Select the Save button.

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      When you change the version, NerveCenter performs no type of error check to confirm the version you choose. However, you can manually confirm SNMP v3 communication with the node. Select the Test Version button to run a test poll and verify communication using the specified version.

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      You can also change the version of one or more nodes from the Node List window. Right-click one or more nodes, select Version, and then select the version you want for the nodes.

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