Monitoring Routers and Switches

[Marc Powell]

On Oct 23, 2009, at 7:18 PM, xmanhosting wrote:

> 1. For the rror message: check_mrtgtraf: Unable to open MRTG log  
> file - Where should the MRTG log file be (using Centos5) ?
> The objects/switch.cfg file says: check_local_mrtgtraf!/var/lib/mrtg/ 
> 192.168.1.253_1.log!AVG!1000000,1000000!5000000,5000000!10 however  
> there is no such folder at var/lib/mrtg/

MRTG is a program that's completely independent of Nagios (like Apache  
or BIND). If you haven't installed, configured and run it, you won't  
be able to use the mrtg based plugins. If you have, you'll need to  
look at your MRTG installation to determine where the MRTG log files  
are located.

> 2. I have read somewhere that for the "Port1 Link" and "Uptime"  
> error, that I maybe be missing files. I notice that there is still  
> no check_snmp plugin in the usr/local/nagios/libexec folder - is  
> this the issue, and how do I get it there

Yes, almost certainly. 127 means that the plugin specified in the  
command{} definition doesn't exist. As for how to fix it, you quoted  
that yourself --

"The check_snmp plugin will only get compiled and installed if you  
have the net-snmp and net-snmp-utils
packages installed on your system. Make sure the plugin exists in /usr/ 
local/nagios/libexec before you
continue. If it doesn’t, install net-snmp and net-snmp-utils and  
recompile/reinstall the Nagios plugins."

If you've installed those two packages, you'll need to recompile and  
re-install the plugins (./configure, make... etc)

--
Marc


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