RE: Getsa and walks by name

-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Dave Shield
Sent: Monday, April 23, 2007 9:31 AM
To: Wilde, Donald
Cc: [email protected]
Subject: Re: Getsa and walks by name

On 23/04/07, [email protected] <[email protected]> wrote:
> > ./configure command line:
> >
> > # ./configure --enable-mini-agent --with-mibdirs="/etc/snmp/mibs"
> > --with-mib-modules="DELL-CMC-MIB" ....

> What you probably want is the configure options
>
>    --with-mibs="+DELL-CMC-MIB"
>
> which *does* add this MIB to the default list.


> At _configure_ time??? Pardon my density, but why would I want to 
> change that at configure time?

So that the software would "just work" as required, without the need for
any run-time MIB configuration.

(And it was your configure incantation that I was commenting on.
So why *did* you want to set that at configure time? :-))


> I thought that was the purpose of the snmp.conf prop declaration 'mibs

> +DELL-CMC-MIB'.

Yes - that should also amend the list of default MIB modules.
Basically, there are several places this information gets set:

  -  command-line options   -   -m  and  MIB::object
  -  snmp.conf file(s)   -  "mibs"
  -  code files   -   config_add_mib()
  -  configure  -   --with-mibs
  -  hardcoded default

In each case, the earlier settings in this list amend (or overwrite)
the later ones.   So if the code was compiled using
    --with-mibs=+DELL-CMC-MIB
then you don't need to specify this in an snmp.conf file, or on the
command line.



> Is there a lurker in there that makes one app work properly with the 
> load-time switch and one app not? I thought every app looked at 
> snmp.conf?

Yes - every app should look at snmp.conf.
If that doesn't seem to be happening, then try running with
   -Dread_config
which will report which config files are being read in, and what they
contain.

Dave

DSW>  Thanks for the very informative reply, Dave -

Yes, it appears that our custom conf directory is not being utilized by
snmpwalk. The MIB is, but the conf file is not. That's the hole. The
snmpd has -C -c /path/to/conf/files as an option set, but snmpwalk has
no such options; it _must_ seek conf files from a hardcoded directory.
Thinking about this, I suppose in most applications it won't matter; the
snmpwalk will come from a more-normal ("Manager") system as opposed to
an embedded widget.

Thanks for your assist! :D

</DSW
--
Don Wilde                           512-723-8255
Dell, Incorporated         Austin, Texas, USA

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