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Old 1st December 2011, 12:53
dilanmic dilanmic is offline
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Default monitor bandwidth via mrtg logs Error on Nagios


I have installed Nagios 3.2.3 with Nagios Plugins 1.4.15, Net-snmp 5.7.1 to Ubuntu 11.10. I am getting following errors message when I try to monitor bandwidth via MRTG logs,

"check_mrtgtraf: Unable to open MRTG log file"

Here is the script of my switch.cfg:

# Monitor bandwidth via MRTG logs
define service
use generic-service
host_name linksys-srw224p
service_description Port 1 Bandwidth Usage
check_command check_local_mrtgtraf!/var/lib/mrtg
/!AVG!1000000,1000000!5000000,50000 00!10

* There is NO mrtg in /var/lib/ directory
* But there is check_mrtg and check_mrtgtraf plugins in /usr/loacl/nagios/libexec directory

Do anyone can help me about this problem?
Thanks in advance...
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Old 1st December 2011, 15:47
dilanmic dilanmic is offline
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Thumbs up Solved


Install MRTG Plugins

Then follow this link:



indexmaker --output /var/www/mrtg/index.html /etc/mrtg/mrtg.cfg

Hope this help
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Old 20th December 2012, 15:46
mpi mpi is offline
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Default Nagios with MRTG

Hi all,

Im using nagios and mrtg ... mrtg is installed and i can see the graphs on http://localhost/mrtg ... and on nagios in the switch.cfg file i have the following

define service{
use generic-service ; Inherit values from a template
host_name RouterCiscoT
service_description Port 1 Bandwidth Usage
check_command check_local_mrtgtraf!/var/www/mrtg/!AVG!1000000,1000000!5000000, 5000000!10
but check_local_mrtgtraf is for local machine (if im not ling my self) and if i used check_mrtgtraf im getting an error while restarting nagios /etc/init.d/nagios restart ... is there any solution for this ??/ what im doing wrong ???
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