Date: Sat, 6 Jun 2015 14:50:16 -0400 From: Andreas Wrede <aew.freebsd@wrede.ca> To: freebsd-questions@freebsd.org Subject: Bridge(4) not learning Message-ID: <C7ABE54B-8E5E-4933-998E-73BBABA472B0@wrede.ca>
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On a FreeBSD 10.1/amd64 system, I have a bridge(4) configured with a =
tap(4) and igb(4) interface as members:
# ifconfig tap0 create up
# ifconfig bridge0 create addm tap0 addm igb1 up
igb1 is the interface to the local LAN with 192.168.0.1 as the servers =
IP address, tap0 is used by openvpn. (igb0 is used for the outside pppoe =
connection via mpd5)
# ifconfig igb1
igb1: flags=3D8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> =
metric 0 mtu 1500
=
options=3D400b8<VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,VLAN_HWTSO>
ether c8:0a:a9:c8:7e:87
inet6 fe80::ca0a:a9ff:fec8:7e87%igb1 prefixlen 64 scopeid 0x2=20
inet 192.168.0.1 netmask 0xffffff00 broadcast 192.168.0.255=20
nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
media: Ethernet autoselect (1000baseT <full-duplex>)
status: active
# ifconfig tap0
tap0: flags=3D8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> =
metric 0 mtu 1500
options=3D80000<LINKSTATE>
ether 00:bd:b3:c4:2e:00
inet6 fe80::2bd:b3ff:fec4:2e00%tap0 prefixlen 64 scopeid 0x7=20
nd6 options=3D21<PERFORMNUD,AUTO_LINKLOCAL>
media: Ethernet autoselect
status: active
Opened by PID 16731
# ifconfig bridge0 =20
bridge0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 =
mtu 1500
ether 02:b6:bc:d0:88:00
nd6 options=3D1<PERFORMNUD>
id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
maxage 20 holdcnt 6 proto stp maxaddr 2000 timeout 1200
root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
member: igb1 flags=3D143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 2 priority 128 path cost 20000
member: tap0 flags=3D143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 7 priority 128 path cost 2000000
With openvpn configured, I can now connect and ping 192.168.0.1 from a =
remote host.
However no other host on the local LAN (192.168.0.0/24) is reachable!=20
Looking at the addresses the bridge has learned I only see the remote =
host's address on the tap(4) side:
# ifconfig bridge0 addr
f6:68:1f:e6:cf:38 Vlan1 tap0 114 flags=3D0<>
#
No addresses from the igb1 side of the bridge are ever learned. Pinging =
a host on the LAN from the remote host produces the expected arp =
requests and replies on the LAN side but the bridge never learns the =
address, thus packets are not forwarded back to the remote host.
Things I have tried without success:
- disabled the pf firewall
- entered static mac address (ifconfig bridge0 static igb1 =
00:13:20:3f:e5:ff)
I have the same setup working properly on another FreeBSD 10.1 system. =
The only difference (besides IP address values) are the network =
interfaces, the other setup uses a em(4) interface.
Is there any other configuration setting I am missing or does bridging =
just now woke with igb(4)s?
--=20
aew
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