Date: Mon, 22 Sep 2008 17:00:59 +0300 From: "Sergey Listopad" <psychosensor@gmail.com> To: freebsd-net@freebsd.org Subject: bridged tap interfaces with stp Message-ID: <b3da4f3f0809220700j2194a0c3x7a4f8999aaa20fde@mail.gmail.com>
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Hi!
I am playing with bridge(4) stp feature.
there are 2 boxes with 7.0-RELEASE-p4.
rt1 rt2
___________ ___________
| ____| |____ |
| |tap1| ------------------------|tap1| |
| | | |
| |tap2|-------------------------|tap2| |
|___________| |___________|
rt1 connected to rt2 with 2 openvpn L2 links (tap).
tap1 bridged with tap2 on both routers.
rt1# ifconfig bridge0
bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
ether 56:8d:35:75:ee:3f
inet 3.3.3.1 netmask 0xffffff00 broadcast 3.3.3.255
id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
maxage 20 holdcnt 6 proto rstp maxaddr 100 timeout 1200
root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
member: tap2 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
member: tap1 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
rt2# ifconfig bridge0
bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
ether 3a:af:9d:0f:c1:b9
inet 3.3.3.2 netmask 0xffffff00 broadcast 3.3.3.255
id 00:00:00:00:00:00 priority 16384 hellotime 2 fwddelay 15
maxage 20 holdcnt 6 proto rstp maxaddr 100 timeout 1200
root id 00:00:00:00:00:00 priority 16384 ifcost 0 port 0
member: tap2 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
member: tap1 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
rt1# ping 3.3.3.2
PING 3.3.3.2 (3.3.3.2): 56 data bytes
64 bytes from 3.3.3.2: icmp_seq=0 ttl=64 time=8.144 ms
64 bytes from 3.3.3.2: icmp_seq=1 ttl=64 time=4.313 ms
64 bytes from 3.3.3.2: icmp_seq=2 ttl=64 time=4.421 ms
...
all works while broadcast
Then I'd try to enable stp on bridge0 interfaces for automatic disable
one of redundant links (tap1/tap2).
rt1# ifconfig bridge0 stp tap1 stp tap2
rt1# ifconfig bridge0
bridge0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST>
metric 0 mtu 1500
ether 56:8d:35:75:ee:3f
inet 3.3.3.1 netmask 0xffffff00 broadcast 3.3.3.255
id 00:1c:c0:39:d6:b9 priority 32768 hellotime 2 fwddelay 15
maxage 20 holdcnt 6 proto rstp maxaddr 100 timeout 1200
root id 00:1c:c0:39:d6:b9 priority 32768 ifcost 0 port 0
member: tap2 flags=147<LEARNING,DISCOVER,STP,AUTOEDGE,AUTOPTP>
port 12 priority 128 path cost 2000000 proto rstp
role disabled state discarding
member: tap1 flags=147<LEARNING,DISCOVER,STP,AUTOEDGE,AUTOPTP>
port 16 priority 128 path cost 2000000 proto rstp
role disabled state discarding
rt2# ifconfig bridge0 stp tap1 stp tap2
rt2# ifconfig bridge0
bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
ether 3a:af:9d:0f:c1:b9
inet 3.3.3.2 netmask 0xffffff00 broadcast 3.3.3.255
id 00:1c:c0:39:d6:ad priority 16384 hellotime 2 fwddelay 15
maxage 20 holdcnt 6 proto rstp maxaddr 100 timeout 1200
root id 00:1c:c0:39:d6:ad priority 16384 ifcost 0 port 0
member: tap2 flags=147<LEARNING,DISCOVER,STP,AUTOEDGE,AUTOPTP>
port 9 priority 128 path cost 2000000 proto rstp
role disabled state discarding
member: tap1 flags=147<LEARNING,DISCOVER,STP,AUTOEDGE,AUTOPTP>
port 8 priority 128 path cost 2000000 proto rstp
role disabled state discarding
But when stp is enabled, it blocks all bridge members, and bridge stop working.
May be I am misunderstand something with stp?
At all it is possible to use bridge(4) stp with tap(4)?
Even when bridge0 on both router has only 1 member, ports stay in
disabled state.
rt1# ifconfig bridge0 deletem tap1 deletem tap2
rt1# ifconfig bridge0
bridge0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST>
metric 0 mtu 1500
ether 56:8d:35:75:ee:3f
inet 3.3.3.1 netmask 0xffffff00 broadcast 3.3.3.255
id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
maxage 20 holdcnt 6 proto rstp maxaddr 100 timeout 1200
root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
rt2# ifconfig bridge0 deletem tap1 deletem tap2
rt2# ifconfig bridge0
bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
ether 3a:af:9d:0f:c1:b9
inet 3.3.3.2 netmask 0xffffff00 broadcast 3.3.3.255
id 00:00:00:00:00:00 priority 16384 hellotime 2 fwddelay 15
maxage 20 holdcnt 6 proto rstp maxaddr 100 timeout 1200
root id 00:00:00:00:00:00 priority 16384 ifcost 0 port 0
rt1# ifconfig bridge0 addm tap1 stp tap1
rt1# ifconfig bridge0
bridge0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST>
metric 0 mtu 1500
ether 56:8d:35:75:ee:3f
inet 3.3.3.1 netmask 0xffffff00 broadcast 3.3.3.255
id 00:1c:c0:39:d6:b9 priority 32768 hellotime 2 fwddelay 15
maxage 20 holdcnt 6 proto rstp maxaddr 100 timeout 1200
root id 00:1c:c0:39:d6:b9 priority 32768 ifcost 0 port 0
member: tap1 flags=147<LEARNING,DISCOVER,STP,AUTOEDGE,AUTOPTP>
port 16 priority 128 path cost 2000000 proto rstp
role disabled state discarding
rt2# ifconfig bridge0 addm tap1 stp tap1
rt2# ifconfig bridge0
bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
ether 3a:af:9d:0f:c1:b9
inet 3.3.3.2 netmask 0xffffff00 broadcast 3.3.3.255
id 00:1c:c0:39:d6:ad priority 16384 hellotime 2 fwddelay 15
maxage 20 holdcnt 6 proto rstp maxaddr 100 timeout 1200
root id 00:1c:c0:39:d6:ad priority 16384 ifcost 0 port 0
member: tap1 flags=147<LEARNING,DISCOVER,STP,AUTOEDGE,AUTOPTP>
port 8 priority 128 path cost 2000000 proto rstp
role disabled state discarding
--
S.Listopad
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