what model is managed switch? On Jan 27, 2008 10:30 AM, Houtan Makeki <[EMAIL PROTECTED]> wrote:
> Hi there ntop newbie here, please help. > > I am interested to use ntop as an IP based traffic monitoring tool. I have > been using MRTG for years, and its great, but now I want IP based > measurements. > > I have a bunch of servers connected to a managed switch. Also the internet > gateway is connected to this switch. (no firewalls). I got ntop working on a > linux machine . It is running in promiscious mode. I can see all traffic to > the local server, but nothing gets logged for traffic from Internet to other > servers connected to the switch. > > I believe the reason the ntop server cant see the Internet to other > servers is that the switch is isolating each port. As far as I understand > the switch remembers the IP to MAC and then MAC to switch port and isolates > traffic that way. *But I could be totally wrong since my understanding of > networking layer level 2 is limited. * > > If I am right then one solution seems to be to put a hub between the > upstream router and the switch and connect the ntop server to that hub, so > it can see all the packets that come and go to and from internet and my > network > > *But before I do this, can anyone tell me if my assumption that the switch > is blocking things is correct. * > > And does anyone know if it is possible to program a 3COM managed switch to > treat one port like a hub! It is a not fun adding a third NIC to this linux > box. > > > > > > > > > _______________________________________________ > Ntop mailing list > [email protected] > http://listgateway.unipi.it/mailman/listinfo/ntop > > -- Audrius
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