tap interface problem

[Mario Lobo]

On Sunday 27 September 2009 16:13:38 Sébastien Serre wrote:
> On Sunday 27 September 2009 18:17:22 Sébastien Serre wrote:
> > Hello, I hope somebody here known well tap interfaces on freebsd :).
> >
> > I try to configure virtualbox with bridge interface. Everything seams ok:
> > # ifconfig tap0
> >
> > tap0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0
> >  mtu 1500
> >         ether 00:bd:4f:0a:00:00
> >         inet 192.168.0.1 netmask 0xffffff00 broadcast 192.168.0.255
> >
> > # ls -l /dev/tap0
> > crw-rw-rw-  1 root  wheel    0, 109 Sep 27 16:54 /dev/tap0
> >
> > The problem is that nothing pass in the tap0 interface. tcpdump does not
> >  show any traffic when I try to connect a machine on the 192.168 network.
> > I can ping the interface address (192.168.0.1). But without with the use
> > of the tap itself (use of lo0):
> >
> > # route -n get 192.168.0.1
> >    route to: 192.168.0.1
> > destination: 192.168.0.1
> >   interface: lo0
> >       flags: <UP,HOST,DONE,LLINFO,WASCLONED,LOCAL>
> >  recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu
> > expire
> >        0         0         0         0         0         0     16384
> >   0
> >
> >
> > Then i have a tap interface up, but i can't pass to it any traffic.
> > Does anybody have a suggestion, or know some debugging tools to show what
> > append?
> >
> > Thanks
> >
> > Sebovick
> > _______________________________________________
> > freebsd-questions at freebsd.org mailing list
> > http://lists.freebsd.org/mailman/listinfo/freebsd-questions
> > To unsubscribe, send any mail to
> >  "freebsd-questions-unsubscribe at freebsd.org"
> 
> Me again,
> 
> I can now listen something on tap0:
> 
> # tcpdump -i tap0
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on tap0, link-type EN10MB (Ethernet), capture size 96 bytes
> 21:08:22.668835 arp who-has 192.168.0.1 tell 192.168.0.101
> 21:08:23.668526 arp who-has 192.168.0.1 tell 192.168.0.101
> 21:08:24.668272 arp who-has 192.168.0.1 tell 192.168.0.101
> 21:08:25.671499 arp who-has 192.168.0.1 tell 192.168.0.101
> 
> 192.168.0.101 is my virtual machine trying to ping the host address of the
>  tap interface. The host did not reply.
> When I try to ping the guest from the host, tcpdump stay silent.
> 
> So the tap interface is ok for the guest, but the host don't know how to
>  talk against tap. Any idea?
> _______________________________________________
> freebsd-questions at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
> To unsubscribe, send any mail to
>  "freebsd-questions-unsubscribe at freebsd.org"
> 
 is the brige0 interface up too? 
-- 
Mario Lobo
http://www.mallavoodoo.com.br
FreeBSD since version 2.2.8 [not Pro-Audio.... YET!!] (99,7% winedows FREE)