Hi Dave,

thanks for the response.  I have added a second NIC but have the same
problem.  Every time I enable port-mirroring on the port connected to
enp2s0f0, both network cards stop responding.  This is my configuration at
present.

enp1s0    Link encap:Ethernet  HWaddr 98:de:d0:00:d4:b5
          inet addr:10.174.64.71  Bcast:10.174.79.255  Mask:255.255.240.0
          inet6 addr: fe80::9ade:d0ff:fe00:d4b5/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:473954 errors:0 dropped:1856 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:69961253 (69.9 MB)  TX bytes:648 (648.0 B)

enp2s0f0  Link encap:Ethernet  HWaddr f4:4d:30:46:7b:cf
          inet addr:10.174.64.72  Bcast:10.174.79.255  Mask:255.255.240.0
          inet6 addr: fe80::f64d:30ff:fe46:7bcf/64 Scope:Link
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:475281 errors:0 dropped:1856 overruns:0 frame:0
          TX packets:1389 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:70100540 (70.1 MB)  TX bytes:383981 (383.9 KB)

Cheers,
Chris.

On 14 October 2016 at 02:23, Dave Davis <d...@davispc.com> wrote:

> You need two NICs
>
>
>
>
>
> *From:* ntop-boun...@listgateway.unipi.it [mailto:ntop-bounces@
> listgateway.unipi.it] *On Behalf Of *It Manager
> *Sent:* Wednesday, October 12, 2016 11:23 PM
> *To:* ntop@listgateway.unipi.it
> *Subject:* [Ntop] Help with setting up
>
>
>
> Hi All,
>
>
>
> I am the network manager for a large high school in Melbourne, Australia.
> I'm currently evaluating ntopng to try to see how well it will help me
> manage my network.  I have installed Ubuntu 16.04LTS on a new desktop
> computer and have installed the latest ntopng according to the
> instructions.  It seems to be installed and working well.  However, since
> the laptop is not "inline" with my network, I don't see too much traffic.
>
>
>
> I have plugged the computer into my main switch.  However, every time I
> put the switch into "port-mirror" mode, I lose connection with the ntopng
> computer completely.  I don't really know much about port-mirroring, and am
> wondering if this is normal?
>
>
>
> I tried adding another network card (albeit an old USB network card) with
> a second connection and IP address, but that also loses connection when I
> put the switch port into mirror mode.
>
>
>
> Any help would be appreciated.
>
>
> Regards,
>
> Chris Stebbing,
>
> Network Manager,
>
> Lilydale High School.
> ------------------------------
>
>
>
>
>
>
> _______________________________________________
> Ntop mailing list
> Ntop@listgateway.unipi.it
> http://listgateway.unipi.it/mailman/listinfo/ntop
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