Date: Mon, 9 Jun 2003 17:23:09 +0300 From: Andrew Degtiariov <freebsd-ipfw@astral-on.net> To: freebsd-net@freebsd.org Subject: Problem with bridge 802.1q frames Message-ID: <20030609142309.GB37504@astral-on.net>
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Hello FreeBSD users!
We'v tried to bridge Ethernet frames across rl0 and vlan0 interfaces and this
does not work.
vlan4|-------|
|---------------| Host1 |
| p1 | |
-----=----- |-------|
| Switch | 192.168.3.100
-----=-----
| p2
|
| vlan0
---------- --------
| | rl0 fxp0| |
|Host2 |-----------|Host3 |
| | | |
---------- --------
192.168.3.15
Host1, Host2 and Host3 in the same VLAN (vlan 6).
Port p1 and port p2 on Swith is "trunk" or "tagged" (add/delete vlan tags).
Host2 is bridge.
On Host3 we execute ping 192.168.3.100.
If we do ifconfig vlan0 inet 192.168.3.254 netmask 255.255.255.0 on Host2 and
lanch ping 192.168.3.100 its work perfectly!
I can see on vlan0 and fxp0 frames that forwarded from Host3 to Host1
Frames passed from host1 don't appeare on vlan0 but on fxp0 do!?
There aren't packet filters on Host2
Some debug information about Host2:
bash-2.05b# uname -spr
FreeBSD 5.1-RC1 i386
bash-2.05b#
bash-2.05b# ifconfig -au
fxp0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
options=8<VLAN_MTU>
ether 00:07:e9:0b:92:cf
media: Ethernet autoselect (100baseTX)
status: active
rl0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
ether 00:00:21:29:2c:c7
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
inet 127.0.0.1 netmask 0xff000000
vlan0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
ether 00:07:e9:0b:92:cf
media: Ethernet autoselect (100baseTX)
status: active
vlan: 6 parent interface: fxp0
bash-2.05b# sysctl net.link.ether
net.link.ether.inet.prune_intvl: 300
net.link.ether.inet.max_age: 1200
net.link.ether.inet.host_down_time: 20
net.link.ether.inet.maxtries: 5
net.link.ether.inet.useloopback: 1
net.link.ether.inet.proxyall: 0
net.link.ether.inet.log_arp_wrong_iface: 1
net.link.ether.inet.log_arp_movements: 1
net.link.ether.ipfw: 0
net.link.ether.bridge_cfg: vlan0:1,rl0:1
net.link.ether.bridge: 1
net.link.ether.bridge_ipfw: 0
net.link.ether.bridge_ipf: 0
net.link.ether.bridge_ipfw_drop: 0
net.link.ether.bridge_ipfw_collisions: 0
net.link.ether.verbose: 0
net.link.ether.bdg_split_pkts: 0
net.link.ether.bdg_thru: 264
net.link.ether.bdg_copied: 0
net.link.ether.bdg_dropped: 0
net.link.ether.bdg_copy: 0
net.link.ether.bdg_predict: 0
net.link.ether.bdg_fw_avg: 0
net.link.ether.bdg_fw_ticks: 0
net.link.ether.bdg_fw_count: 0
bash-2.05b#
This is "tcpdump -i fxp0" output
15:22:45.738897 802.1Q vlan#6 P0 arp who-has 192.168.3.100 (2e:2f:30:31:32:33) tell 192.168.3.15
15:22:45.739121 802.1Q vlan#6 P0 arp reply 192.168.3.100 is-at 0:2:b3:61:ab:8d
15:22:46.599665 802.1d config 07d0.00:30:84:1c:1c:92.8015 root 07d0.00:30:84:1c:1c:92 pathcost 0 age 0 max 20 hello 2 fdelay 15
15:22:46.749497 802.1Q vlan#6 P0 arp who-has 192.168.3.100 (2e:2f:30:31:32:33) tell 192.168.3.15
15:22:46.749759 802.1Q vlan#6 P0 arp reply 192.168.3.100 is-at 0:2:b3:61:ab:8d
15:22:47.760087 802.1Q vlan#6 P0 arp who-has 192.168.3.100 (2e:2f:30:31:32:33) tell 192.168.3.15
15:22:47.760311 802.1Q vlan#6 P0 arp reply 192.168.3.100 is-at 0:2:b3:61:ab:8d
15:22:48.490190 802.1d config 07d0.00:30:84:1c:1c:92.8015 root 07d0.00:30:84:1c:1c:92 pathcost 0 age 0 max 20 hello 2 fdelay 15
15:22:48.770688 802.1Q vlan#6 P0 arp who-has 192.168.3.100 (2e:2f:30:31:32:33) tell 192.168.3.15
15:22:48.770920 802.1Q vlan#6 P0 arp reply 192.168.3.100 is-at 0:2:b3:61:ab:8d
15:22:49.781306 802.1Q vlan#6 P0 arp who-has 192.168.3.100 (2e:2f:30:31:32:33) tell 192.168.3.15
15:22:49.781537 802.1Q vlan#6 P0 arp reply 192.168.3.100 is-at 0:2:b3:61:ab:8d
15:22:50.771076 802.1d config 07d0.00:30:84:1c:1c:92.8015 root 07d0.00:30:84:1c:1c:92 pathcost 0 age 0 max 20 hello 2 fdelay 15
15:22:52.669977 802.1d config 07d0.00:30:84:1c:1c:92.8015 root 07d0.00:30:84:1c:1c:92 pathcost 0 age 0 max 20 hello 2 fdelay 15
15:22:54.560392 802.1d config 07d0.00:30:84:1c:1c:92.8015 root 07d0.00:30:84:1c:1c:92 pathcost 0 age 0 max 20 hello 2 fdelay 15
And "tcpdump -i vlan0" output
15:22:45.738830 arp who-has 192.168.3.100 (2e:2f:30:31:32:33) tell 192.168.3.15
15:22:46.749436 arp who-has 192.168.3.100 (2e:2f:30:31:32:33) tell 192.168.3.15
15:22:47.760028 arp who-has 192.168.3.100 (2e:2f:30:31:32:33) tell 192.168.3.15
15:22:48.770633 arp who-has 192.168.3.100 (2e:2f:30:31:32:33) tell 192.168.3.15
15:22:49.781246 arp who-has 192.168.3.100 (2e:2f:30:31:32:33) tell 192.168.3.15
--
Andrew Degtiariov
AD5898-RIPE
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