Re: Seeking your help...

[Rik Wade <rik@rikwade.com>]

On Fri, 02 May 2003, Atul Ganatra wrote:

> Can u  pls. suggest me a suitable tool for monitoring the Bandwidth on a 
> particular WAN Link, with the provision of monitoring individual bandwidth 
> consumption for the traffic from two or more different hosts at the data 
> center (all applications or hosts being TCP/IP based) ? There is no 
> policy-based routing or QoS defined, the traffic needs to be differentiated 
> only be the virtue of the Host IP and probably the Port No. on the Host.

You may be able to get by with MRTG (http://www.mrtg.org) by polling the SNMP
statistics of the switch port for each host. RRDTool (http://www.rrdtool.org) is
a more advanced version, which may prove to be more flexible.

However, if you'd like to run a single process on a distribution-layer switch/router,
then you could enable NetFlow data export on the router (search Cisco's website for
NetFlow and you'll find information). I can highly recomend Flow Tools 
(http://www.splintered.net/sw/flow-tools/) and Flow Scan 
(http://net.doit.wisc.edu/~plonka/FlowScan/) for data collection and subsequent graphing.

All of the above tools should work just fine on OpenBSD (although I've not done it myself).
--
rik