When a MIB file is “loaded”, the MIB file and any dependent files are read into memory. The object types that are available for a device are limited to those types that are defined in the MIB file. Loading the MIB is a client-side operation that does not require remote communication. When a MIB file load is initiated using the button, the Select MIB(s) to load dialog box appears, as shown in Figure 20.
In this dialog box, you can select all files that are required to load the MIB (including those MIB files that satisfy dependencies). If you have not used the auto-loaded MIBs feature, you must select all of the required files at the same time by holding down the Ctrl key and clicking and highlighting each file to be loaded.
The SNMP point manager can accept these MIB files in any order, so you do not have to know the MIB's load order dependencies (however, you will need to know which MIB file will be compiled and loaded last as this is the MIB file that will be displayed in the table)
Once you have highlighted all necessary MIB files, selecting the button in the dialog box begins the compile process. The resulting table contains only MIB entries for the most recent MIB file to be compiled and loaded.
If there are errors when trying to compile the MIB files that you selected, an error message displays to indicate the errors encountered. For example, a missing dependent MIB file (if you forgot to highlight a necessary dependent MIB file) would cause an exception pop-up similar to the one shown in Figure 20
If no errors are encountered after issuing the LoadMIB command, the MIB entries contained in the loaded MIB file appear in the table (as shown in Figure 16 and Figure 17).