[mrtg] OID's missing or adjusted after changing hardware

[Troy Wical]

Steve, thanks for the comments.  They got me back on track and all is  
working well now.

Although they are small items, here are some items I ran across, for  
future searches:

-debian snmp loads all mibs automagically under /usr/share/snmp/mibs/
-below is what was in my cfg file, and is what caused my problems:

"LoadMIBs: /usr/share/snmp/mibs/UCD-SNMP-MIB.txt,/usr/share/snmp/mibs/ 
TCP-MIB.txt "

Obviously there was a problem with how the two were spaced with  
the ,   So I seperated them out, making this folowing:

LoadMIBs: /usr/share/snmp/mibs/UCD-SNMP-MIB.txt
LoadMIBs: /usr/share/snmp/mibs/TCP-MIB.txt

All fixed now :)

Thanks again for the pointers!

Peace, Troy

On Nov 15, 2008, at 11:07 AM, Steve Shipway wrote:

> The problem is not that the new machine does not have the OIDs in  
> the SNMP, but that your MRTG seems no longer to be able to resolve  
> the symbolic names (ssCpuRawUser, etc) into numerical OIDs.  I am  
> guessing that you are missing the MIB files, or need to load them  
> into MRTG with the LoadMib directive?
>
> You have two options -
>
> 1) Use numerical OIDs instead of the symbolic names
> 2) Install the MIBs on your machine and load them into MRTG.
>
> You may already have the required MIBs (likely) but not have them  
> loaded by the SNMP client by default.  In this case, either set them  
> to load by default (see the snmp.conf) or tell MRTG to load them  
> (use LoadMibs: in the configuration files)
>
> Steve
>
> ________________________________________
> From: mrtg-bounces at lists.oetiker.ch [mrtg-bounces at lists.oetiker.ch]  
> On Behalf Of Troy Wical [troy at wical.com]
> Sent: Sunday, 16 November 2008 4:20 a.m.
> To: mrtg at lists.oetiker.ch
> Subject: [mrtg] OID's missing or adjusted after changing hardware
>
> NET-SNMP version:  5.2.3
> Linux 2.6.24-etchnhalf.1-686
>
> I recently changed to a new machine and am having issues getting mrtg
> back up and running.  The two hosts had the exact same kernel
> installed.  However, the CPU and memory are significantly newer on
> this host that I have moved to.  The MIB's that I was using on the old
> host simply don't exist on the new one, and I can't find similar ones
> on the new host that would seem likely candidates to replace the old
> ones.
>
> Here is an example of what I was using on the old host:
>
> Target[host.cpu]: ssCpuRawUser.0&ssCpuRawIdle.0:[removed]@localhost
> RouterUptime[host.cpu]: [removed]@localhost
> MaxBytes[host.cpu]: 100
> Title[host.cpu]: User and Idle CPU usage
> PageTop[host.cpu]: <H1>User and CPU Load</H1>
> ShortLegend[host.cpu]: %
> YLegend[host.cpu]: CPU Usage
> Legend1[host.cpu]: User CPU in % (Load)
> Legend2[host.cpu]: Idle CPU in % (Load)
> LegendI[host.cpu]: User
> LegendO[host.cpu]: Idle
> Options[host.cpu]: growright,nopercent
> Unscaled[host.cpu]: ymwd
>
> The 'ssCpuRawUser' and 'ssCpuRawIdle' simply don't exist on the new
> host when I snmpwalk it.  And there seems to be nothing related.  Here
> is the same config with two examples of MIB's I pulled from the new
> host.  I ran these just to see if they would work, even though I knew
> that would not be related to User and Idle cpu load....
>
> Target[host.cpu]: hrSystemInitialLoadDevice.0&hrSystemProcesses.0:
> [removed]@localhost
> RouterUptime[host.cpu]: [removed]@localhost
> MaxBytes[host.cpu]: 100
> Title[host.cpu]: User and Idle CPU usage
> PageTop[host.cpu]: <H1>User and CPU Load</H1>
> ShortLegend[host.cpu]: %
> YLegend[host.cpu]: CPU Usage
> Legend1[host.cpu]: User CPU in % (Load)
> Legend2[host.cpu]: Idle CPU in % (Load)
> LegendI[host.cpu]: User
> LegendO[host.cpu]: Idle
> Options[host.cpu]: growright,nopercent
> Unscaled[host.cpu]: ymwd
>
> Here are the errors I get when I try to run the new config....
>
> Unknown SNMP var hrSystemInitialLoadDevice.0
>  at /usr/bin/mrtg line 2043
> Unknown SNMP var hrSystemProcesses.0
>  at /usr/bin/mrtg line 2043
> 2008-11-15 08:17:54: WARNING: Expected a number but got '4:17:16'
> 2008-11-15 08:17:54: WARNING: Expected a number but got 'host'
> 2008-11-15 08:17:55: ERROR: Target[host.cpu][_IN_] ' $target->[1]
> {$mode} ' did not eval into defined data
> 2008-11-15 08:17:55: ERROR: Target[host.cpu][_OUT_] ' $target->[1]
> {$mode} ' did not eval into defined data
>
> Thanks in advance for any help.  Search engines have defied me on this
> one.
>
> Peace, Troy
>
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