I agree with Thomas Leathley. No config IP config of at least no gateway is
needed. Here’s my config:
(as you can see I have no IP set in the config of eth3 and my /etc/intefaces is
set to auto dhcp – it’ll never pick up an address on the mirror port )
eth2 Link encap:Ethernet HWaddr 90:e2:ba:24:45:12
inet addr:192.168.94.254 Bcast:192.168.95.255 Mask:255.255.252.0
inet6 addr: fe80::92e2:baff:fe24:4512/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3344727 errors:0 dropped:0 overruns:0 frame:0
TX packets:1718961 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:342468300 (342.4 MB) TX bytes:666358623 (666.3 MB)
Memory:fcbe0000-fcbfffff
eth3 Link encap:Ethernet HWaddr 90:e2:ba:24:45:13
inet6 addr: fe80::92e2:baff:fe24:4513/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3182839522 errors:158 dropped:0 overruns:0 frame:158
TX packets:9128 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2521160242179 (2.5 TB) TX bytes:3118920 (3.1 MB)
Memory:fcba0000-fcbbffff
From: [email protected]
[mailto:[email protected]] On Behalf Of It Manager
Sent: Thursday, October 13, 2016 6:19 PM
To: [email protected]
Subject: Re: [Ntop] Help with setting up
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 <[email protected]
<mailto:[email protected]> > wrote:
You need two NICs
From: [email protected]
<mailto:[email protected]>
[mailto:[email protected]
<mailto:[email protected]> ] On Behalf Of It Manager
Sent: Wednesday, October 12, 2016 11:23 PM
To: [email protected] <mailto:[email protected]>
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.
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