Re: Built Net-SNMP Win32 and Missing UCD-SNMP-MIB

2009/8/17 Jaskiewicz, Michael-P49499 <[email protected]>:
> Does access control suppress portions of the tree? When I perform an
> SNMPWalk, it successfully reads a large portion of the tree. If the
> access control were screwed up, wouldn't it just not read anything?

No - it depends on what the access configuration settings are.
It *is* possible to use access control to block particular sections
of the tree.   That's why Wes suggested it as a possibility.


> Why do you say that the removal of the MIB text files doesn't matter?

Because the presence or absence of MIB files on the client side
does not affect what information is supplied by the agent.
The only difference is how that information is reported by the
client application.   If it has the relevant MIB files loaded, then
it will display the results using MIB object names.   If the relevant
MIB files are not available, then it will display the same results
using numeric OIDs.

Things are slightly different if the MIB files are not present on
the agent side, but they are still not actually necessary.


> If the files are not present and you start snmpd, it says "cannot find
> module (<module_name>): at line 1 in (none)". Put the text files back in
> and you can walk the tree successfully.

The agent has a list of MIB files that it tries to load, yes.
And if your snmpd.conf file refers to OIDs by name (e.g. as part
of access control settings), then those MIB files are necessary
in order to process the config settings correctly.
   But if the MIB files are missing, and the configuration is set
up using numeric OIDs, then the agent *will* operate correctly.
(It will complain about the missing files, but will still work).


I would still like to know exactly how you are trying to query the agent.

Dave

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