CentOS - Oct 2009 - Switch to measure traffic at IP level?

Hello all:

Is there a network switch that will give me traffic
stats at an IP address level?

Right now, I only get statstics at a port level, but
that does not help since each of my servers run several
virtual machines and I need to measure traffic
per virtual machine.

Thanks,
	Neil

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Neil Aggarwal wrote:
> Hello all:
>
> Is there a network switch that will give me traffic
> stats at an IP address level?
any of these can:
http://www.sflow.org/products/network.php

Myself I'm  biased towards Extreme networks having used them
for almost 10 years now, very easy to use.

nate

----- "Les Mikesell" <lesmikesell at gmail.com> escreveu:
> Neil Aggarwal wrote:
> > Matt:
> >  
> >> why not just use your current cacti setup and 
> >> enable snmp on each of the hosts?  That seems like 
> >> the simplest and cheapest approach.
> > 
> > As I understand it, I would actually have to
> > enable snmp on each of the guests, not the hosts.
> > 
> > Am I wrong?
> > 
> 
> Yes - the host would see the total traffic.  The only other way to
> separate it would be something upstream (switch/router, etc.) that knows
how to do
> sflow plus a collector device.  These are typically pretty expensive.  For
> some small number of guests it might be cheaper to add NICs to your hosts
and
> bridge the guests to individual NICs where you could monitor on either the
host
> interface or the connected switch port.  You might be able to simulate this
with
> some clever use of vlans but I'm not sure how they interact with the
> virtual nic bridges.
Hum... I haven't tried it myself but maybe it is possible to try on the
virtual NICs.
The only drawback is that the need to create a way to link the data from the
vifs to
the corret guest :)

    Antonio. 

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