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Date:      Mon, 14 Dec 2009 11:35:47 -0800
From:      Jack Vogel <jfvogel@gmail.com>
To:        Kurt Buff <kurt.buff@gmail.com>
Cc:        freebsd-net@freebsd.org
Subject:   Re: Not seeing data on an unnumbered interface...
Message-ID:  <2a41acea0912141135k35a4bd1fi8f727aaf19a188ec@mail.gmail.com>
In-Reply-To: <a9f4a3860912141129v28af3f13x1f9e9ae725ff5170@mail.gmail.com>
References:  <a9f4a3860912141129v28af3f13x1f9e9ae725ff5170@mail.gmail.com>

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Not familiar with ntop, but I notice below that the em interface is not UP,
what
if you `ifup em0` ?

Jack


On Mon, Dec 14, 2009 at 11:29 AM, Kurt Buff <kurt.buff@gmail.com> wrote:

> All,
>
> I'm having a very strange problem. I'm running ntop - the unnumbered
> interface is not receiving any data.
>
> Running 'tcpdump -i em0' also gets no data. I am really baffled - I've
> tried it against a switch that I know has a correctly configured
> mirror port, as I have ntop running on another machine and that works
> fine in the same port, but it's running 7.1-RELEASE.
>
> Anyone have thoughts on this?
>
>
> # uname -a
> FreeBSD zntop.mycompany.com 8.0-RELEASE FreeBSD 8.0-RELEASE #0: Sat
> Nov 21 15:48:17 UTC 2009
> root@almeida.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  i386
>
> # cat /etc/rc.conf
> hostname="zntop.mycompany.com"
> ifconfig_rl0="DHCP"
> ntpdate_enable="YES"
> ntpdate_flags="-b 192.168.10.191"
> sshd_enable="YES"
> ntop_enable="YES"
> ntop_flags="-d -u ntop -P /home/ntop/databases -K -L -t 6 -o -i em0 -W 0"
>
> zntop# ifconfig
> em0: flags=8902<BROADCAST,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
>        options=9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM>
>        ether 00:1b:21:04:2a:c5
>        media: Ethernet autoselect (100baseTX <full-duplex>)
>        status: active
> rl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>        options=8<VLAN_MTU>
>        ether 00:0c:46:b3:43:53
>        inet 192.168.24.51 netmask 0xffffff00 broadcast 192.168.24.255
>        media: Ethernet autoselect (100baseTX <full-duplex>)
>        status: active
> lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
>        options=3<RXCSUM,TXCSUM>
>        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
>        inet6 ::1 prefixlen 128
>        inet 127.0.0.1 netmask 0xff000000
>
>
> Kurt
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