And if we can just get it working on my AMD Opterons, that would be
REALLY cool..
Bret
Chris Moore - GMD wrote:
I just wanted to second Bret's comments on sFlow. Luca has made some really
nice changes in the latest version of the sFlow plugin and has even better
stuff in mind for the future. Ntop is well on its way to being a kick-butt
sFlow collector/analyzer.
Luca rulez! ;-)
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bret
Jordan
Sent: Wednesday, October 13, 2004 9:41 AM
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject: Re: [Ntop] Question (probably dumb) from a new user
Yes your FastIrons and BigIrons, things based on their JetCore ASIC do
support this. Foundry has started outsourcing some of their "edge"
devices and I am not sure if the EdgeIron have this support. But I believe
they use the same chipset (broadcom) as the HP 2800 series. And if that is
the case, then the chipset does support it and Foundry has probably turned
it on in their software.
Another thing to think about when you are doing this is what kind of VLANs
do you have. If you put a hub before the router or port mirror a port some
where in your network, that does not mean you will get all the traffic as
you will only see the layer 2 traffic that needs to go across that link. If
the traffic is internal to some VLAN then you might not pick it up.
Foundry does support SFLOW, which is really cool BTW. So you can setup a
box (NTOP) as an SFLOW collector and tell all your switches to send samples
of all packets to the collector. This will give you a good idea of what is
going on in your network everywhere, regardless of where you put the NTOP
box and what VLANs you have.
I would really use the CVS version of NTOP though if you are going to use
SFLOW. Luca made some really nice changes to the SFLOW plugin, but it is
still a CVS only kind of thing. Another thing, do not try to run NTOP with
SFLOW on AMD Opterons. It does not work. I am trying to get a box setup
for Luca to test on so that we can get this working.
Bret
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