[rrd-users] Re: plotting traffic usage, so easy, and yet so hard?

[Leigh Sharpe]

To have RRDTool imitate the old MRTG setup, you need to use COUNTER for your
datasources. If you are recording octets in/out on your NIC, and you are
able to produce a graph of the throughput, you are almost there. (you email
indicates that you have already done this much.) When printing the graph,
GPRINT a LAST on your datasource to get the current throughput.

Regards,
             Leigh

Leigh Sharpe
Network Systems Engineer
Pacific Wireless
Ph 9584 8966
Mob 0408 009 502
email lsharpe at pacificwireless.com.au
web www.pacificwireless.com.au

----- Original Message -----
From: "Rommel, Florian" <Florian.Rommel at quartal.com>
To: <rrd-users at list.ee.ethz.ch>
Sent: Wednesday, January 15, 2003 3:02 AM
Subject: [rrd-users] plotting traffic usage, so easy, and yet so hard?


>
> description:
> OS to monitor: OpenBSD 3.2, ucd-snmp installed and working
> OS that monitors: RH Linux, rrdtool also working
> what i want to do: Get a 5 minute reading on what the current traffic
throughput (in mbit or kbit) is on a certain NIC on the OpenBSD box.
>
> Ok, I went thru the archives and besides the fellow that tried to sell the
script and some other small messages here and there is nothing that I found
about this subject. I used to use mrtg and to the current throughput on a
NIC it was very easy, but to get the current throughput on a NIC in rrdtool
it seems a bit more tricky. I got disk monitoring and cpu monitoring as well
as memory usage already plotting, so I don't think I am totally in the dark.
I think that the thing that I need to monitor is
> interfaces.ifTable.ifEntry.ifInOctets.INTERFACE_NUMBER. Someone on another
list told me to use the DERIVE method to get the actual traffic shown,
however I just don't get it.
>
> I mean am I even on the right track to accomplish what I wanna do? I read
the number on interfaces.ifTable.ifEntry.ifInOctets.INTERFACE_NUMBER and
then rrdtool derives it from the last number? How does that give me the
current kilobits/s? and should I use a counter or a gauge for this? I was
inclined for a gauge.
>
>
> Anyway I know this might all sound pretty senseless and dumb, the fact
that I just had a long day behind me doesn't help making it clear either, so
please bear with me. Any help with documentation or examples etc. would be
appreciated.
>
>
> cheers,
>
> //FR
>
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