[mrtg] Help with configuring target to used an oid

[Johannes Prost]

Hi Wes,

I am not that familiar with mrtg, but I remember vage I had a similiar error output
for one of my configurations and if I remember correct, placing a dot in front of
the OID fixed it for me.

Your example shows:
Target[tower001.ap101]: 1.3.6.1.4.1.161.19.3.1.7.1.0:Canopy at 10.254.1.101
:::::2

Change to, try and see what happens:
Target[tower001.ap101]: .1.3.6.1.4.1.161.19.3.1.7.1.0:Canopy at 10.254.1.101
:::::2

Note the dot in front of the very first number of your OID
Hope this will fix it.

Johannes


> Hello everyone,
>
> Hopefully I have a simple problem.  I am trying to pull the number of
> clients from a Motorola Cyclone Access Point.  I have figured out the OID
> number to use, it is: 1.3.6.1.4.1.161.19.3.1.7.1.0.
>
> I can snmpwalk from the machine that mrtg is running on and get the expected
> response.  Here it is:
> snmpwalk -v 2c -c Canopy 10.254.1.101 1.3.6.1.4.1.161.19.3.1.7.1.0
> SNMPv2-SMI::enterprises.161.19.3.1.7.1.0 = INTEGER: 28
>
> Here is my cfg file for this:
> #
> # File: /etc/mrtg/registered_SM_count.cfg
> #
> # Configuration file for gathering number of registered SM's on AP's
> statistics
> #
>
> #
> # Define global options
> #
>
> WorkDir: /var/www/mrtg/
> # Refresh brower window very 5 minutes
> Refresh: 300
> LoadMIBs: /usr/share/snmp/mibs/SNMPv2-MIB.txt, /usr/share/snmp/mibs/SNMPv2-
> SMI.txt
>
> #
> # Registered SM Monitoring
> #
>
> Target[tower001.ap101]: 1.3.6.1.4.1.161.19.3.1.7.1.0:Canopy at 10.254.1.101
> :::::2
> Title[tower001.ap101]: SM Count Tower 001 AP 101
> MaxBytes[tower001.ap101]: 200
> PageTop[tower001.ap101]: <H1>SM Count for Tower 001 Access Point
> 10.254.1.101</H1>
>
>
> The error I get is:
> 2007-02-09 12:20:38: ERROR: Target[tower001.ap101][_IN_] '
> 1.3.6.1.4.1.161.19.3.1.7.1. $target->[0]{$mode} ' (warn): Use of
> uninitialized value in concatenation (.) or string at (eval 15) line 1.
> 2007-02-09 12:20:38: ERROR: Target[tower001.ap101][_OUT_] '
> 1.3.6.1.4.1.161.19.3.1.7.1. $target->[0]{$mode} ' (warn): Use of
> uninitialized value in concatenation (.) or string at (eval 16) line 1.
>
>
> I notice that the OID number is one digit short, it is missing the last 0.
>
> I am thinking that I may need to use WaLK prepended to the OID.  Just not
> sure how to do that.  I cannot find a decent example of its use.
>
> Any ideas?
>
> Thanks,
>
> Wes Hegge
> Network Manager
> T6Broadband, Inc.
>
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>
>


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