Make sure your running mrtg with the --logging <filename> option .. 

Your log file should show why its failing / what its doing.

------
thanks
  kevin.foote

On Wed, 7 Apr 2010, Scott Danton wrote:

-> Does anyone have any ideas on how to troubleshoot why some of my interfaces 
are not graphing.   Is there something that I can look at to see on either the 
router or the mrtg server?
-> 
-> Thanks,
-> Scott
-> 
-> From: [email protected] 
[mailto:[email protected]] On Behalf 
Of Scott Danton
-> Sent: Monday, April 05, 2010 4:13 PM
-> To: '[email protected]'
-> Subject: [mrtg] MRTG Graphs not populating.
-> 
-> I have been monitoring my t-1 lines for about 3 years and have never realy 
had a problem.  My server crashed and I rebuilt on a VM. It has been so long 
that I do not remember anything that I had to do to get things running.  I did 
have some old back ups of cfg file.  I have re-installed and I am haing a 
strange issue.  I monitor multiple interfaces on 3 devices.  Here is the 
strange part.  On one device I am collecting information on 2 of the 3 
interfaces.  One is completely blank.  The second device collect the 
information for my remote sites.  I am getting information on 4 of the 7.  So 3 
are blank.  On the last device I am missing information on 1 of the 2 
interfaces.  The config is the same one I used on the old server so that should 
not be the problem.  Each device is giving information, so I know the SNMP is 
working.  I am lost.  Please let me know if you need any further information.
-> 
-> Thanks,
-> Scott
-> 

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