Thanks for your reply
When I added the Cisco router I clicked in "Add Netflow Device", telling ntop to use port 2055 and Cisco's LAN subnet as the virtual netflow interface.
After that, I added the PacketShaper, clicking again in "Add netflow device", again port 2055 and using PacketShaper's LAN subnet as the virtual netflow interface.
I thought that if I wanted to monitor several devices I only needed to switch NIC, and that I could use the same port: I thought ntop would receive all traffic through port 2055 and would distinguish devices checking source IP address (thanks to virtual netflow interface).
After your replies, if I have understood properly, I need to use different UDP ports if I want to monitor these 2 devices as separated NICs, since I am interested in getting totally separated graphs/statistics for each device. Am I right?
I'll give it a try and will tell you if it works...
Regards,
Cesar
> From: [EMAIL PROTECTED]
> To: [email protected]
> Subject: RE: Re: [Ntop] Can not monitor more than one netflow device
> Date: Thu, 20 Apr 2006 16:46:22 -0500
>
> Yes. If you want separate virtual interfaces, they need to use unique port
> #s.
>
> I suspect that the code doesn't actually test if the inbound port # is
> reused, but it won't work properly.
>
> -----Burton
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gary
> Gatten
> Sent: Thursday, April 20, 2006 3:59 PM
> To: [EMAIL PROTECTED]; [email protected]
> Subject: RE: Re: [Ntop] Can not monitor more than one netflow device
>
> It's been awhile since I looked at this, but I recall having to use a unique
> port for each virtual interface? I could be wrong, it's just what I recall
> and my memory seems a little broken these days. I'll take a closer look
> tomorrow as well.
>
> Gary
>
>
> >>> [EMAIL PROTECTED] 4/20/2006 3:53:21 PM >>>
> Thanks for your quick reply...
>
> I am already using different netflow virtual interfaces, that way ntop
> should distinguish between traffic from Cisco and PacketShaper.
>
> I have checked FAQ but found nothing about using different udp ports for
> each provider. I'll give a try tomorrow, meanwhile more ideas are welcomed
> :)
>
> Regards,
>
> Cesar
>
>
> ----------------------------------------
> > Date: Thu, 20 Apr 2006 15:40:32 -0500
> > From: [EMAIL PROTECTED]
> > To: [EMAIL PROTECTED]; [email protected]
> > Subject: Re: [Ntop] Can not monitor more than one netflow device
> >
> > I *think* you have to configure a different netflow virtual
> interface
> > (and udp port) for each netflow provider. Check the FAQ and man
> pages
> > to be certain.
> >
> > Gary
> >
> >
> > >>> [EMAIL PROTECTED] 4/20/2006 3:30:58 PM >>>
> > Hello,
> >
> > I've got ntop installed on a Red Hat Enterprise AS 3. ntop version
> is
> > 3.2, compiled from tgz file from sourceforge, only one interface
> eth0.
> >
> > I have started it with /usr/local/bin/ntop -L -u ntop -d, and we
> want
> > to monitor 2 netflow devices (Cisco 3845 and PacketShaper 6500, both
> > netflow v5).
> >
> > I added firstly the Cisco 3845, and ntop started to collect data and
> > draw nice graphs and statistics.
> >
> > However, after adding the second device (PacketShaper, both with the
> > same destination port udp/2055, only difference is local subnet) I
> have
> > noticed that ntop will not display any more info about Cisco. ntop
> now
> > only displays info and graphs about PacketShaper.
> >
> > Am I doing something wrong? Any misconfiguration? Any idea of what
> > might be happening? Any help will be appreciated :)
> >
> > Regards,
> >
> > Cesar
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