Date: Tue, 12 Jan 2016 23:00:43 +0100 From: =?UTF-8?Q?Olivier_Cochard=2DLabb=C3=A9?= <olivier@cochard.me> To: "Alexander V. Chernikov" <melifaro@freebsd.org> Cc: Adrian Chadd <adrian.chadd@gmail.com>, "freebsd-current@freebsd.org" <freebsd-current@freebsd.org>, "freebsd-wireless@freebsd.org" <freebsd-wireless@freebsd.org> Subject: Re: forwarding didn't work if wlan0 is member of a bridge Message-ID: <CA%2Bq%2BTcpR=jx00yWf%2Bwovk5a2ptdOPz78bpGVe=shr8N631Cdcw@mail.gmail.com> In-Reply-To: <1223091452631961@web14j.yandex.ru> References: <CA%2Bq%2BTco3MKBvhCQXvVaDkRZQYzX6tye8opD3yKrtnnF3imGDCg@mail.gmail.com> <CA%2Bq%2BTcq-CkyBMxvmWEDu1Ejg_36CDHmhPBE1t7CiV37hDVTvNQ@mail.gmail.com> <CAJ-Vmo=FJGwuaw6y--e3U6GfmtdUo4gnZwvhjeZXGaEmvEj-OQ@mail.gmail.com> <CA%2Bq%2BTcoHXeAmOQ2_-7c0WHMHHB3SvPpGdUiOLteG8tQXxCsQqA@mail.gmail.com> <1223091452631961@web14j.yandex.ru>
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On Tue, Jan 12, 2016 at 9:52 PM, Alexander V. Chernikov <
melifaro@freebsd.org> wrote:
>
> Could you show 'netstat -rn' output when one of bridge members is down?
> Btw, I tried to reproduce it today (but, with ix0 instead of wlan0) and I
> wasn't able to trigger the problem.
>
>
Sure,
here some output with the re1 (member of bridge) unplugged:
root@
fbsd-router
:~ # ifconfig bridge0
bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu
1500
ether 02:6b:c0:de:b8:00
inet 1.1.1.1 netmask 0xffffff00 broadcast 1.1.1.255
nd6 options=9<PERFORMNUD,IFDISABLED>
groups: bridge
id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200
root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
member: wlan0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 5 priority 128 path cost 33333
member: re1 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 2 priority 128 path cost 55
root@
fbsd-router
:~ # ifconfig re1
re1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0
mtu 1500
options=82099<RXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC,LINKSTATE>
ether 00:0d:b9:3c:ae:25
nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
media: Ethernet autoselect (none)
status: no carrier
root@
fbsd-router
:~ # netstat -r
4
n
Routing tables
Internet:
Destination Gateway Flags Netif Expire
1.0.0.0/24 link#1 U re0
1.0.0.1 link#1 UHS lo0
1.1.1.0/24 link#6 U bridge0
1.1.1.1 link#6 UHS lo0
127.0.0.1 link#4 UH lo0
During this "one-member-unplugged", the freebsd-router can still ping each
hosts on different connected interface, it just "refuse" to forward between
its interfaces:
root@fbsd-router:~ # ping 1.1.1.2 (the wireless client connected to wlan0,
member of the bridge0 interface)
PING 1.1.1.2 (1.1.1.2): 56 data bytes
64 bytes from 1.1.1.2: icmp_seq=0 ttl=64 time=4.600 ms
64 bytes from 1.1.1.2: icmp_seq=1 ttl=64 time=5.878 ms
^C
--- 1.1.1.2 ping statistics ---
2 packets transmitted, 2 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 4.600/5.239/5.878/0.639 ms
root@fbsd-router:~ # ping 1.0.0.2 (an host on the LAN0)
PING 1.0.0.2 (1.0.0.2): 56 data bytes
64 bytes from 1.0.0.2: icmp_seq=0 ttl=64 time=0.282 ms
64 bytes from 1.0.0.2: icmp_seq=1 ttl=64 time=0.280 ms
^C
--- 1.0.0.2 ping statistics ---
2 packets transmitted, 2 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.280/0.281/0.282/0.001 ms
root@fbsd-router:~ # arp -na
? (1.1.1.1) at 02:6b:c0:de:b8:00 on bridge0 permanent [bridge]
? (1.1.1.2) at 00:c0:ca:7e:8b:fe on bridge0 expires in 1055 seconds [bridge]
? (1.0.0.1) at 00:0d:b9:3c:ae:24 on re0 permanent [ethernet]
? (1.0.0.2) at 0c:c4:7a:6b:a6:d3 on re0 expires in 1106 seconds [ethernet]
And the wireless client (1.1.1.2) can still ping the fbsd-router bridge
interface (1.1.1.1) too (for answering to the Adrian question).
Now I replug re1:
root@fbsd-router:~ # ifconfig re1
re1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0
mtu 1500
options=82099<RXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC,LINKSTATE>
ether 00:0d:b9:3c:ae:25
nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
media: Ethernet autoselect (1000baseT <full-duplex,master>)
status: active
and here are netstat output (no changes with previous):
root@fbsd-router:~ # netstat -r4n
Routing tables
Internet:
Destination Gateway Flags Netif Expire
1.0.0.0/24 link#1 U re0
1.0.0.1 link#1 UHS lo0
1.1.1.0/24 link#6 U bridge0
1.1.1.1 link#6 UHS lo0
127.0.0.1 link#4 UH lo0
Because you didn't reach to reproduce with ix0 in place of wlan0, I've did
some modification to my bridge setup:
1. In place of using re1+wlan0, I've put re1+re2 in the bridge0. And I've
connected an host on re2: I didn't reach to reproduce the problem too, then I
confirm we didn't have this bug with 2 Ethernet Interfaces.
2. In place of using PCI ath(4) (Atheros 9280), I've plugged an USB rum(4)
(old Ralink) and configured it as wlan0 like was the ath0: the bridge0 was
reverted to re1+wlan0.
And I reach to reproduce the problem with a different wireless card: This
thread seems correctly belong to the "wireless" mailing-list :-)
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