[mrtg] Re: (THIS IS A REPOST AS I DIDNT GET EVEN 1 REPLY TO THE PREVIOUS MAIL)

[Daniel J McDonald]

> From: HASSARAJANI, Chetan
> Sent: Friday, February 02, 2001 6:17 AM
> To: mrtg at list.ee.ethz.ch
> Friends,
> 	I use mrtg to monitor my CISCO router and it works
> great. [...]
> Now I want to know who/which IP is actually using the link.

There are three ways to accomplish this:
1.  Monitor the device that the workstations plug into, such as a switch or
a hub.  You can tell from the utilization on each port how much the computer
attached to that port is using.  This is fairly straight forward.

2.  Create rate-limit statements for every host on the network and monitor
the CAR mib to see how much traffic each user is using.  For an example of
this, see my page at http://www.geocities.com/djmcdon1/

3.  Run Netflow on the router and export the flow data to a program like
cflowd, which will tell you everything you ever wanted to know about your
traffic at the cost of all of the disk space you can throw at it.  (Anybody
working on rrdtool as a database backend to cflowd?  That would solve the
major problem with cflowd - the half a terabyte of disk space required to
make use of it.)

Daniel J McDonald - CCIE 2495, CNX
Principal Network Specialist
Digicon Technologies
http://www.digicontech.com
dmcdonald at digicontech.com

Digicon - A Cisco Systems Partner, Silver Certified.


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