[rrd-users] Re: measure the total traffic

[T. Xar]

Hi

First i would say thank you for your answers and yes, that is what i want.
So you mean it is not possible ?

I need a tool for logging traffic going through our network, because i think
the ISP of our company measure a much to large traffic, which we never used.
It lies in the range from 20 GB and thats is really much money.
(Maybe they do wrong whith what you have wrote ........)
Now i decided to log also the sum of traffic and can show the monthly result
the ISP.
If the ISP counts wrong its nice for the company, but if not i would like to
know which service in our class c range cause so much traffic.
It should count the sum of the in and out going traffic of a IP range or one
IP or only a web server, etc......
I have hoped that the combination of snmp and rrdtool can do so.
So which tools are using the many ISPs outthere to charge (corrrectly) with
their customers ?

Thank you in advance
Thomas Xar


----- Original Message -----
From: "Logg, Connie A." <cal at SLAC.Stanford.EDU>
To: "'Luc Brouard'" <mailing-lists at slortar.net>; <rrd-users at list.ee.ethz.ch>
Sent: Friday, August 30, 2002 12:37 AM
Subject: [rrd-users] Re: measure the total traffic


>
> You asked:
>
> > is it possible to measure the total traffic with snmp which was gone
through the network ?
>
> Yes and no!  What do you mean by the total traffic through the network?
If you mean all the sum of all the bytes going in and out of each and every
port in your network, yes, but it is a meaningless number.
> Most packets(bytes) will go through more than one port, and so you will be
double, triple, etc. counting the same packets(bytes).  Be careful what you
ask for...you may get it, and it may be useless.
>
> You need to take the time to really think about what questions you are
trying to answer with your monitoring.
>
> Connie Logg - Network Analyst - 650-926-2879
> Stanford Linear Accelerator Center
> MS 97; 2575 SandHill Road; Menlo Park CA 94025
> "Happiness is found along the way, not at the end of the road"
>
> -----Original Message-----
> From: Luc Brouard [mailto:mailing-lists at slortar.net]
> Sent: Thursday, August 29, 2002 3:10 PM
> To: rrd-users at list.ee.ethz.ch
> Subject: [rrd-users] Re: measure the total traffic
>
>
>
> On Thu, Aug 29, 2002 at 11:07:44PM +0200, T. Xar wrote:
> > hi all,
> >
> > snmp gives me many information of my network
>
> yes
>
> > mrtg reads the snmp and make log files which i have configured that mrtg
should do and generate the graphics for that.
>
> yes
>
> > rrdtools can do the same as mrtg, but it is more powerful, faster, make
more graphics and store it in a database and does not need mrtg
>
> yes
>
> >
> >
> > so my questions are:
> > is it possible to measure the total traffic with snmp which was gone
through the network ?
>
> yes
>
> > would some logs get lost if the system crash ?
>
> dunno
>
> > if it's not possible with snmp, could it a other tool like tcpdump ?
>
> ok with snmp, as well with netstat -k (on solaris), or ifconfig on
> linux, or cat /proc/dev/net on linux also ..
> Surely not tvpdump (too much resources used)
>
> > can rrdtool and mrtg evaluate other log, dump files then from snmp ?
>
> dunno
>
> > can rrdtool and/or mrtg generate statistics of the built traffic per
hour, day, week, month, year ?
>
> yes (both)
>
> > can i store the evaluation in a sql database ?
>
> nope or at least to generate the graphs with rrdtool, data needs to be
> in a rrd database also (flat file), but the sql database can be used to
> fill data into rrd (I think cacti is working this way, not sure though
> as I don't use cacti)
>
> Luc

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