Use > Explore SNMP MIB Source Information

Explore SNMP MIB Source Information

The MIB fileManagement Information Base files are the basic building block of SNMP communication protocol. SNMP Agents are configured to respond to requests defined by a group of supported MIB files. (source text file) is the basic building block of the SNMP communication protocol. Each entry in a MIB file represents a piece of information you can gather from or change on devices in your network upon demand.

NNMi includes many MIB files and your NNMi Administrator can install any number of additional MIB files.

You can explore the information available in each MIB file in several ways:

If your NNMi role allows, you can use the MIB file to interactively gather data from devices in your network and change settings on network devices. See Use the MIB Browser. For example:

.1.3.6.1 is the base of the Internet MIB structure.

.1.3.6.1.2.1 is the base of the MIB-2 branch.

.1.3.6.1.3 is the base of all MIB objects that are for experimental purposes.

.1.3.6.1.4.1.9 is the base of all MIB objects provided by Cisco.

.1.3.6.1.4.1.11 is the base of all MIB objects provided by HP.

.1.3.6.1.5 is the base of the Security MIB branch.

.1.3.6.1.6 is the base of the SNMPv2c MIB branch.

Display a MIB File (source text file)

Inspecting a MIB fileManagement Information Base files are the basic building block of SNMP communication protocol. SNMP Agents are configured to respond to requests defined by a group of supported MIB files. is useful for determining the date the MIB file was last updated, as well as seeing the syntax for writing MIB files.

There are multiple access points for displaying the MIB file source.

From the MIB Variables View:

  1. NNMi Level-2 Operators and above:
    Navigate to the InventoryMIB Variables view.

  2. Select any row representing a MIB variable.
  3. Do one of the following:

    • Click ActionsDisplay MIB File.
    • Right-click the row and select Display MIB File.
  4. NNMi displays the MIB file's source text file.

From the MIB Form:

  1. Open the MIB of interest using the MIB Form.
  2. Click ActionsDisplay MIB File.
  3. NNMi displays the MIB file's source text file.

From the MIB Browser:

  1. Use the MIB Browser, open the MIB of interest.
  2. Generate SNMP Walk results for the MIB of interest.
  3. Select a row in the results, and click ToolsDisplay MIB File.
  4. NNMi displays the MIB file's source text file.

Determine which MIBs a Specific Node Supports

When troubleshooting a problem, it is helpful to know which MIB files are supported by the troubled Node's SNMP Agent. Then you can determine which MIB Variables are available to help you resolve the problem.

To explore the MIBs supported on a selected Node:

  1. Do one of the following:

    • Select the Node in any map or table view.
    • Select an Incident in an Incident view, and navigate to the Incident's Source Node form.
  2. Select ActionsMIB InformationList Supported MIBs.

    You can also right-click any object in a table or map view to access the items available within the Actions menu.
  3. If SNMP communications between NNMi and the Node are working, you will see the list of MIB files currently supported by the Node's associated SNMP Agent.

    If the menu item List Supported MIBs is greyed-out, NNMi does not have access to SNMP communications with this Node. Contact your NNMi administrator to request Communication Configuration settings that establish SNMP communications with this Node.

  4. To learn which information can be provided by each MIB file, do the following:

    • Click the displayed link to open a MIB Form. and explore the contents of that MIB file.
    • Within the MIB form, click ActionsDisplay MIB File to read the actual source text of the MIB file, if you prefer that format. See Display a MIB File (source text file).
  5. See Use the MIB Browser to gather the current MIB Variable values being reported by the SNMP Agent assigned to a Node.