[mrtg] Can not determine ifNumber

wesnjusa wesnjusa at hotmail.com
Tue Sep 29 18:14:13 CEST 2009



I have one HP ProCurve 1800-24 switch that is not returning data within MRTG.  MRTG is running on the newest Ubuntu.  I have five HP ProCurve 1800-24, four return good data.  The configuration is identical.


The problem switch returned good data for about a month then all ports returned flat-line output.  Then I modified the /etc/cfg-files/sw240/240.cfg file by adding the unknaszero option to the line options[_]: growright,bits,unknaszero.


I have removed this options since.  Once I added the unknaszero option the output from the switch stopped, MRTG graph empty.  


Now in the log file /var/log/mrtg/mrtg.log I get the same results for every port on the problem switch:


date/time: WARNING: Can not determine ifNumber for public at   ref: 'Name' key: 'Port #1'

corresponding ERROR: Target[][IN] ' $target->[10]{$mode} ' did not eval into defined data


This switch is the only switch I'm having trouble with.  I have compared the configuration with the other switches and they seem to be identical.  I'm missing something.  I've tried removing the .old files, it didn't help.


within the /etc/mrtg.cfg file I did add the unknaszero option and since taken it away.  This had no effect on my MRTG results.


WorkDir: /var/www/mrtg


I have gone as far as rebooting this machine.


Thank you in advance for any help.


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