measuring bandwidth?

[Frederik Vanhee]

Hello,

I'm facing the same problem, SNMP only giving counter values and I need 
bandwidth.
If found the check_iftraffic.pl plugin on Nagiosexchange. It keeps track 
of the former counter value via a file in /tmp -directory and calculates 
the bandwidth when the plugin is executed again.

Frederik

>>-----Original Message-----
>>From: nagios-users-admin at lists.sourceforge.net [mailto:nagios-users-
>>admin at lists.sourceforge.net] On Behalf Of Cam
>>Sent: Friday, July 15, 2005 9:58 AM
>>To: nagios-users at lists.sourceforge.net
>>Subject: [Nagios-users] measuring bandwidth?
>>
>>Hi,
>>
>>I've got some more stuff i'm trying to work out.  We want to measure
>>the bandwidth that the server is using and have nagios warn us if it
>>get's too high or too low.  Right now i'm monitoring that over SNMP w/
>>cacti and it's working good, but that just makes me pretty graphs, and
>>i need warnings.  anyway, i'm trying to figure out the best way to do
>>this and i wanted to get other people's input.  The problem that i'm
>>having is that if i poll the data over SNMP that i just get a
>>meaningless COUNTER value.  So i guess what i'm wondering is does
>>nagios have anyway to keep track of these things themselves, or do i
>>need to write a script sort of like this (psuedo-code):
>>    
>>
>
>No, it doesn't. Each plugin only looks at the current values of whatever
>it's checking and has no idea of historical values.
>
>  
>
>>#this file has the SNMP data polled last time nagios ran my script
>>OLD = read $foor
>>NEW = snmpget localhost ifinOctets.bar #something like that
>>echo $NEW > $foo | awk $4 -print
>>
>>x = $(($NEW - $OLD))
>>
>>if [ $x -lt $SOME_VALUE ]; then
>>  print_warning_message
>>elif [ $x -gt $OTHER_VALUE ]; then
>>  print_another_warning_message
>>else
>>  print_ok_message
>>fi
>>
>>is there any problems w/ this approach?  is there a cleaner way to do
>>    
>>
>
>That's one way to do it. The other, probably better way would be to use
>the check_mrtgtraf plugin or check_rrd_data.pl (in the contrib dir) to
>read the rate data directly from the file depending on which format
>Cacti uses. The thread below also seems to provide another mechanism --
>
>http://64.233.187.104/search?q=cache:EB26O7k-Ok8J:forums.cacti.net/about
>624.html%26highlight%3D+check_rrd_data.pl+rrd&hl=en
>
>
>  
>
>>it?  what exactly are the rules for plugin output (it seems like it's
>>just 'FOO [OK|WARNING|FAIL]: comments'--is that right?
>>    
>>
>
>No, it's not sufficient. Check out the Developer Guidelines at
>http://nagiosplug.sourceforge.net/. It's very simple.
>
>--
>Marc
>
>
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>  
>



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::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. 
::: Messages without supporting info will risk being sent to /dev/null