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MIB Browser

 

Understanding the MIB Browser

The MIB Browser enables you to work with SNMP to perform the following tasks:

  • View, load, and unload SNMP MIB information.

  • Query SNMP MIB information from a network device.

  • Filter the SNMP MIB tree display by trap numbers.

  • Launch the SNMP Trap Editor to configure the SNMP traps to record.

    In most cases, the preconfigured events that come with the Event Browser should be sufficient to meet your needs. In some situations however, you might want to create, modify, and delete the traps that are processed by the SNMP Trap server. To do so, you can launch the SNMP Trap Editor from the MIB Browser.

Viewing MIB Information

To view MIB information:

  1. Select Tools > MIB Browser.
  2. In the MIB pane, select the MIB object for which you want more information.
  3. Select the MIB Detail tab to view a description of the selected MIB object.
    Figure 1: MIB Browser with MIB Details
    MIB Browser with MIB Details

Loading and Unloading MIB Subtrees

To load and unload MIB subtrees:

  1. Select Tools > MIB Browser.
  2. In the MIB pane, click the gear icon and select Load MIB.
    Figure 2: Gear Icon in MIB Browser
    Gear Icon in MIB Browser
  3. Specify whether you want to load the new MIBs from the local client or the IP/MPLSView server, and browse to find the MIBs you want to load.

    If you load the MIBs from the server, Browse accesses the /u/wandl/thirdparty/MIBs directory by default, which is the repository for MIBs from Juniper Networks and other vendors.

    Figure 3: Server File Browser
    Server File Browser
  4. Click Select to load the desired MIBs.
  5. To unload a specified MIB object, right-click the object in the left pane and select Unload this MIB.

Querying SNMP MIB Information from Network Devices

To query SNMP MIB information from network devices:

  1. Select Tools > MIB Browser.
  2. From the Access Device tab, specify the IP address in one of the following ways:
    • Click the magnifying glass icon in the Host/IP Address box. Select the device profile and associated network device that you want to query, and click Select.

      This action populates the Hostname, Host/IP Address, SNMP Community, and SNMP Port settings in the Access Device tab.

    • Type a value in the Host/IP Address box.

  3. Specify the SNMP Version (SNMPv1, SNMPv2c, or SNMPv3), and the SNMP Community string (default value is public).

    Choosing SNMPv3 displays additional authentication and password settings in the SNMPv3 group box.

    Figure 4: MIB Browser Access Device Tab
    MIB Browser Access Device Tab
  4. In the MIB pane, click the MIB object for which you want to collect information.

    This action populates the object identifier (OID) setting in the Access Device tab.

  5. Retrieve data for the selected OID in one of the following ways:
    • To get data for the specified OID, select Retrieve > Get.

    • To step through the OIDs to get data for the next OID in the MIB, select Retrieve > Get next repeatedly.

    • To get data for all of the child OIDs of a selected parent OID, select Retrieve > Get all.

      Figure 5 shows the results of retrieving all child OIDs under the ifXTable MIB object. The MIB Browser displays the results in a tabular format with columns for each field.

      Figure 5: MIB Browser Retrieving All OIDs
      MIB Browser Retrieving
All OIDs

Filtering the MIB Tree Display by Trap Numbers

To filter the MIB tree display by trap numbers:

  1. Select Tools > MIB Browser.
  2. In the MIB pane, click the gear icon and select Filter by trap.

    Figure 6 shows the MIB objects under ifEntry listed in ascending order by trap number.

    Figure 6: MIB Browser Filtering by Trap Numbers
    MIB Browser Filtering
by Trap Numbers

Modifying SNMP Trap Configuration Files

To modify SNMP trap configuration files:

  1. Select Tools > MIB Browser.
  2. In the MIB pane, click the gear icon and select Enable SNMP Config Editing.
  3. In the MIB pane, navigate to and select the trap you want to modify.

    Information about the properties of the selected trap is displayed in the MIB Detail tab.

    Figure 7: Modify SNMP Trap Config for bgpEstablished
    Modify SNMP Trap Config for bgpEstablished
  4. Right-click the trap you want to modify and select Modify SNMP Trap Config.

    This action launches the SNMP Trap Editor.

  5. Select the Trap Configuration tab and modify the properties as needed.

    You can specify the trap name, trap OID, associated element type, severity, and a comment. You can also select or clear the Trap enabled check box to control whether or not the SNMP trap server can process the trap.

    Figure 8: SNMP Trap Editor Trap Configuration Tab
    SNMP Trap Editor Trap Configuration Tab
  6. Select the Advanced Configuration tab and modify the properties as needed.

    Select the Use OID as element key check box to use the OID subidentifier as the key to associate the trap with the appropriate network element. You can then specify a value in the OID index key template field to map the subidentifier to the associated element.

    Figure 9: SNMP Trap Editor Advanced Configuration Tab
    SNMP Trap Editor Advanced Configuration Tab
  7. Select the Trap Attributes tab and modify the attributes as needed.

    The Edit Trap OID Attributes box lists the various MIB attribute OIDs associated with this trap and the corresponding MIB attribute name. To modify a particular MIB attribute, double-click the value you want to modify to make it editable.

    A nonzero value starting with 1 in the Element Key Priority column indicates that this OID is the key to identify the trap with its associated network element. For these key OIDs, the value in the Event Attribute Mapping column maps the value from the trap to the appropriate Event Browser column. For example, in Figure 10, the bgpPeerState trap uses the keyword name as a mapping to the Event Browser.

    • To add a new MIB, click the plus (+).

    • To delete a MIB, select the row for that MIB and click the minus (-).

    • To automatically repair any previously entered OIDs that are incorrect, click Reset.

    Figure 10: SNMP Trap Editor Trap Attributes Tab
    SNMP Trap Editor Trap
Attributes Tab