[mrtg] Re: Measuring Bandwidth Usage

[McDonald, Dan]

I think we are trying too hard here.

Set MaxBytes1 and MaxBytes2 to the appropriate up/download speeds and mrtg
by default does the rest of the work.  Unless I am missing something
blitheringly obvious.
Now, mrtg is not magic - you do need a counter somewhere.  So, if your
cablemodem has snmp support, then you can just run cfgmaker, tweak the
config with the appropriate MaxBytes1 and MaxBytes2 settings, and away you
go.  If your cablemodem doesn't have that support, then monitor the port of
the switch that you are plugged into (You do have an snmp capable switch,
right?)

Daniel J McDonald, CCIE #2495, CNX
Lan/Wan Integrator
Austin Energy
1.512.322.6739
dan.mcdonald at austinenergy.com


-----Original Message-----
From: PAUL WILLIAMSON [mailto:pwilliamson at mandtbank.com]
Sent: Friday, November 15, 2002 7:41 AM
To: mrtg at list.ee.ethz.ch; colman at ppllc.com
Subject: [mrtg] Re: Measuring Bandwidth Usage



If the app in question runs over a specific port, you could use ntop with
RRDTool to 
watch the specific protocol usage.

Otherwise, you'd need a linux box or something similar where you could
monitor the 
firewall rules - I think.

Paul

>>> Jake Colman <colman at ppllc.com> 11/15/02 08:33AM >>>


    DI> there is a bandwidth usage script out there ....  on google do a
    DI> search for: mrtg totalizer

I looked the 'mrtg totalizer' and I don't see how this will give me what I
want.  This is either because I don't understand howit works or I am not
clearly explaining what I need.

My cablemodem has certain amount of bandwidth available for upload/download
-
different values for each.  I'd like to see how much of my bandwidth is
being
used throughout the day and to monitor whether I am swaming its
capabilities.  

Similarly, my wireless network also has limited bandwidth.  I suspect that
an
app running between one of the wireless nodes and my server might be dumping
a huge number of packets and effecting performance of all other wirless
nodes.  How can I monitor that?

-- 
Jake Colman                     

Principia Partners LLC                  Phone: (201) 209-2467
Harborside Financial Center               Fax: (201) 946-0320
902 Plaza Two                          E-mail: colman at ppllc.com 
Jersey City, NJ 07311                  www.principiapartners.com 

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