Template:FAQ:MIBs 04
This is related to the previous questions. Remember, the results that you receive from an agent do not depend on which MIBs are loaded by the client tools - purely on how the agent was compiled and configured.
Because the tools don't necessarily read in every MIB file they can find (and the relevant MIB file may not be available anyway), it is quite possible for results from an agent to refer to modules that have not been loaded (particularly with GETNEXT requests, or when walking a tree).
The results will be reported correctly, but won't be translated to use named identifiers (or display the values in the most appropriate manner). To fix this, add the missing MIB files to the list of MIBs to be loaded. See the previous entries and the entry "How do I add a MIB to the tools?" for more information.