tap interface problem
mlobo at digiart.art.br
Sun Sep 27 20:49:58 UTC 2009
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
> > _______________________________________________
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> 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?
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is the brige0 interface up too?
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