Hello,
> This really isn't an ntop question ... It belongs with the switch
> vendor. Because it's dependent on their implementation of sFlow and
> (more importantly) on what 'chain-linked' is and how it's implemented.
Sorry for the OT, I just thought that someone here may have experience
with this kind of setup.
> Within the realm of standard Ethernet and tcp/ip, the 'procurve'
> switch in your diagram will never see packets local to either of the
> 'non-sFlow' switches, so it wouldn't be able to report ANYTHING about
> them.
That's correct: if the traffic remains within any "non-sFlow" switches
I won't see
anything. But if the traffic is like this:
Computer1 -->
non s-Flow switch -> Procurve Switch -> gateway
Computer2 -->
Would I be able to distinguishing from which computer the traffic comes
from using
sFlow at the Procurve switch?
Thanks a lot,
Victor.
> -----Burton
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
> Of Victor Rodriguez Cortes Sent: Tuesday, May 16, 2006 10:21 AM To:
> [EMAIL PROTECTED] Subject: [Ntop] SFlow and chain linked
> switches
>
> Hello,
>
> I'm new to the list and maybe someone has some experience with this
> and could give me some advice. I sent this questions to the Misc list,
> but I didn't received any reply yet. I hope that someone here may help
> me.
>
> I would like to know what kind of information would SFlow give me
> from a chain- linked switch that does NOT support SFlow. The network
> would be something like this (sorry, I'm too bad drawing with
> letters!):
>
>
> Gateway
> |
> Procurve 2800
> | |
> Non-sflow switchA Non-slow switchB
> | |
> Network devices Network devices
>
>
> For some systems (printers, voip phones, some departments...) I do
> not need the performance of one Procurve's Gb port, so I would use
> those ports for other systems and use a different switch to give
> network access to less performance-hungry devices. It's basically a
> matter of cost per port, trying to avoid buying 2 or more ProCurve and
> reuse some basic switches that I have right now.
>
> - Would I see real information for traffic that comes from / goes to
> systems connected to the Non-sflow switches? Obviously all traffic
> would be detected on the Procurve port that has switchA and switchB
> connected to, but I suppose that I should get the IP address of each
> system and be able of identify each one through it (as is there was
> just one system with many IP addresses).
>
> - Would I be able of getting real traffic stats from those systems?
>
> - Would all this work if the switches are connected with a 2Gb
> trunk?
>
> Many thanks in advance,
> Victor.
>
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