Re: Subagentx : how to define the path where MIBS are installed

OK, now I understand.

But I'm still in trouble with my test. I run my sample subagentX with a
directory where no MIBS exist, and I try the command:

snmpwalk -Oa -c public -v 2c localhost:1400 system

I think I would have an error as system is not known, but I get no error and
snmpwalk displays me the right informations.

Problably, I miss something again.

>From: "Dave Shield" <D.T.Shield@csc.liv.ac.uk>
>To: "Arnaud BODENAN" <arnboden@hotmail.com>
>CC: net-snmp-users@lists.sourceforge.net
>Subject: Re: Subagentx : how to define the path where MIBS are installed
>Date: Fri, 13 Oct 2006 09:16:39 +0100
>
>On 13/10/06, Arnaud BODENAN <arnboden@hotmail.com> wrote:
>>I debug with the token "parse-mibs" and I get the following output:
>>
>>registered debug token parse-mibs, 1
>>parse-mibs: Module SNMPv2-SMI not found
>>parse-mibs: Module RFC1155-SMI not found
>>parse-mibs: Module RFC1213-MIB not found
>>parse-mibs: Scanning directory /home/arnboden/testMonitoring/etc
>>parse-mibs: No index
>>parse-mibs: cannot open MIB directory /home/arnboden/testMonitoring/etc
>
>
>So the agent is looking in the correct place (and failing to find any
>MIBs).
>As expected.
>
>
>>Despite these errors, I still do a snmpwalk on the tables defined in my
>>MIB
>>which is not in the directory /home/arnboden/testMonitoring/etc.
>
>Ah - I understand what you're meaning now.
>Remember that the MIB files are only used to translate between numeric
>OIDs and textual names. They are not involved in actually providing
>the relevant management values.
>That is effectively hardcoded into the subagent binary.
>
>Please see the FAQ entry
> "Do I actually need the MIB files?"
>
>If the MIB files are not installed, the agent will continue to run
>quite unaffected.
>(Apart from a few places where it actually refers to MIB objects by
>name, such as defining the access control views). But in general, the
>agent doesn't use MIB files much at all.
>
>The absence of MIB files is more visible with the command-line tools -
>snmpwalk and friends. These can also work without the MIB files being
>present, but everything will be displayed using numeric OIDs.
> You couldn't say
> snmpwalk -v 1 -c public -On localhost system
>
>since snmpwalk wouldn't know what was meant by "system".
>But you *could* say
> snmpwalk -v 1 -c public -On localhost .1.3.6.1.2.1.1
>
>and you'd see basically the same information.
>
>
>
>So returning to your original question:
>>I create a subagentX and I set the Path for the MIBS...
>>it successfully parses the MIB files despite I set a wrong path for the
>>MIB.
>
>In fact the subagent is *not* parsing the MIB files, but it doesn't
>need them to run.
>
>Dave

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