The Intranet Management System

Managing MIB node data

For each of the nodes known to IMS, there is a record within the MIB database containing information on the objects maintained by the SNMP agent and peer processes. For a complete list of these objects, and on their interpretation, refer to ``UnixWare group and object descriptions''.

The IMS MIB-handling services are supplied via the Main screen Manage menu.

Displaying node configuration values

You can query the MIB database for a known node and display the results by highlighting an entry in the main screen, then selecting the Main screen Manage Show Values menu option.

A screen is displayed that contains the identifier of the selected node in its first field.

The second field contains a community string, used to determine the access granted to remote machines when interrogating SNMP information on your local machine. See ``Configuring the SNMP ``communities'' group'' for more information on community strings and access rights.

The ``MIB Browser'' field displays the MIB hierarchy, including the groups and their constituent objects stored for the selected node. For example, the system object group (a constituent part of MIB-2) contains entries for the sysDescr, sysObjectID, and so on, objects. Clicking on one of these entries displays the numerical index of the entry in the ``Selected item'' field, for example ``1.3.2.4.1.1'' for sysObjectID. This index is used by SNMP to navigate around the MIB hierarchy. Double-clicking on an entry displays a pop-up window containing information about that entry. For example:

   Name: sysObjectID.0
   Type: Object Identifier
   Value: SCO.1.2.0.0

If permission for the query is not available (an incorrect community string was employed in the formulation of the query), an error message is displayed.

Setting node configuration values

In order to set configuration values for a remote, SNMP-enabled node, highlight its entry in the main screen, then select the Main screen Manage Set Values menu option.

See ``Displaying node configuration values'' for details on the layout of the data fields on this screen.

Note that the entry in the node identifier field is editable, so the node whose configuration values are to be changed can be selected even after the ``Set Values'' screen has appeared.

Select the MIB object you want to set. The selected item must be a leaf in the MIB object tree. An error message is displayed if this is not the case, or if the object is read-only. Highlighting an entry displays its MIB object index in the ``Selected item'' field, and its current value in a pop-up screen. Edit the value directly in the text field, then click Set. Once the value has been changed, a message is displayed confirming success. Otherwise, an error message is displayed if the node identifier is not recognized, if the MIB object selected is not a ``leaf'' in the tree, or if the value setting operation lacks the proper authorization. (Authorization can be set using the ``SNMP Configuration Manager''.)

Control remains with the ``Set_values'' screen, allowing more values to be edited. To return to the main screen, click on the Cancel button.

NOTE: You can only change editable MIB variables. The MIB variable must be a ``leaf'' in the tree, and cannot be a component of a table. You cannot set the values of a table of MIB items using the SCOadmin Intranet Manager. This must be done from the command line using setany(1Msnmp).

Selecting and loading MIBs

To load a MIB definition from a file, select the Main screen Manage Load MIB menu option.

The fields in the screen that appears have the same function as those described in ``Saving and loading a node database'': entries in the ``Files'' field are filtered for the occurrence of the string ``MIB''. The default directory shown in the screen is that selected as the IMS home directory during installation.

Once the correct specification appears in the ``Selection'' field, click on OK. The selected MIB definition file is parsed by IMS on loading, and added to the MIB hierarchy as displayed by the ``Show Values'' screen (see ``Displaying node configuration values'').

Once the load operation has completed, control is returned to the main screen.