hosts on bridged wlan can not reliably see each other

[Randy Bush]

On 09.01.04 14:20, Sam Leffler wrote:
> Randy Bush wrote:
>> soekris 5501 of nov 28, pre new arp
>>
>> problem description
>>    o all hosts on the wireless can get outside, no problem
>>    o they can also get to wired devices on vr[1-3]
>>    o they can reliably not see/ping/... each other on the wireless
>>    o the soekris can ping them all
>>    o higher layers are worse
>>    o the messages on this list worry me about upgrading this week,
>>      as this is my home gate to the world and somewhat complex
>>      (bridge, tunnel, pppoe, ...), whereas the mass of servers are
>>      all pretty straightforward.
>>
>>             .----------------.
>>             |                |
>>             |       b ---ath0| 192.168.0.0/24
>>             |       r        |
>> ext iij    |       i --- vr1| LAN hosts,
>> PPP/NAT ---|vr0--- d        |
>>    WAN      |       g --- vr2| DHCP Clients
>>             |       e        |
>>             |       0 --- vr3| pptp 200-209
>>             |                |
>>             `----------------'
>>
>> ath0:<Atheros 5212>  mem 0xa0010000-0xa001ffff irq 15 at device 17.0 on
>> pci0
>> ath0: [ITHREAD]
>> ath0: WARNING: using obsoleted if_watchdog interface
>> ath0: mac 5.9 phy 4.3 radio 3.6
>>
>> # uname -a
>> FreeBSD soek0.psg.com 8.0-CURRENT FreeBSD 8.0-CURRENT #2: Fri Nov 28
>> 19:16:10 UTC 2008     root at soek0.psg.com:/usr/obj/usr/src/sys/SOEK0  i386
>>
>> wlans_ath0="wlan0 wlan1"
>> create_args_wlan0="wlanmode hostap channel 11 ssid rgnet-aden wep wepkey
>> arbitrarykeys weptxkey 1 media autoselect mode 11g up"
>> cloned_interfaces=bridge0
>> ifconfig_bridge0="192.168.0.1 addm vr1 addm vr2 addm vr3 addm wlan0 addm
>> wlan1 up"
>> ifconfig_vr1=up
>> ifconfig_vr2=up
>> ifconfig_vr3=up
>> gateway_enable=YES
>>
>> the soekris can see them all
>>
>> # arp -an
>> ? (192.168.0.10) at 00:15:c5:4a:6f:c5 on bridge0 [bridge]
>> ? (192.168.0.12) at 00:1e:52:70:b6:36 on bridge0 [bridge]
>> ? (192.168.0.13) at 00:15:00:10:ed:09 on bridge0 [bridge]
>> ? (192.168.0.17) at 00:0d:65:27:bd:f2 on bridge0 [bridge]
>> ? (192.168.0.128) at 00:23:12:fc:39:b9 on bridge0 [bridge]
>> ? (192.168.0.129) at 00:23:df:6a:dc:9b on bridge0 [bridge]
>>
>> and gets log entries of
>>
>> Jan  2 00:01:09 soek kernel: rtfree: 0xc2e803c0 has 1 refs
>> Jan  2 00:01:16 soek kernel: rtfree: 0xc2e80078 has 1 refs
>> Jan  2 00:01:16 soek kernel: rtfree: 0xc2e80078 has 1 refs
>> Jan  2 00:01:16 soek kernel: arp_proxy: ignoring request from
>> 192.168.0.10 via vr2, expecting bridge0
>>
>> what more should i do to debug?
>
> Use tcpdump to track where the packets are visible.  If this is a
> wireless issue you will have stats to identify drops as well as the
> usual debug facilities.

sorry, this is why i was arp conscious

soekris# ping 192.168.0.129
PING 192.168.0.129 (192.168.0.129): 56 data bytes
64 bytes from 192.168.0.129: icmp_seq=0 ttl=64 time=113.103 ms
64 bytes from 192.168.0.129: icmp_seq=1 ttl=64 time=349.680 ms
64 bytes from 192.168.0.129: icmp_seq=2 ttl=64 time=366.531 ms
^C
--- 192.168.0.129 ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 113.103/276.438/366.531/115.700 ms

then, when pinging (unsuccessfully) from another host on the wireless

soekris# tcpdump -i bridge0 host 192.168.0.129
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on bridge0, link-type EN10MB (Ethernet), capture size 96 bytes
05:40:28.486793 arp who-has 192.168.0.129 tell 192.168.0.12
05:40:29.486335 arp who-has 192.168.0.129 tell 192.168.0.12
05:40:30.486776 arp who-has 192.168.0.129 tell 192.168.0.12
05:40:31.487058 arp who-has 192.168.0.129 tell 192.168.0.12
05:40:32.487227 arp who-has 192.168.0.129 tell 192.168.0.12
^C
5 packets captured
2192 packets received by filter
0 packets dropped by kernel


ath ierrors are an old fact of life here, see a thread from almost a 
year ago

soekris# netstat -ni
Name    Mtu Network       Address              Ipkts Ierrs    Opkts 
Oerrs  Coll
vr0    1500 <Link#1>      00:00:24:c8:b3:28 139171779     0 102370058 
   0     0
vr1    1500 <Link#2>      00:00:24:c8:b3:29        0     0        0 
0     0
vr2    1500 <Link#3>      00:00:24:c8:b3:2a 11034998     0 54497266 
0     0
vr3    1500 <Link#4>      00:00:24:c8:b3:2b   246912     0   321750 
0     0
ath0   2290 <Link#5>      00:0b:6b:83:59:25 192042747 20665363 77278643 
    27     0
lo0   16384 <Link#6>                          111523     0   111523 
0     0
lo0   16384 fe80:6::1/64  fe80:6::1                0     -        0 
-     -
lo0   16384 ::1/128       ::1                      0     -        0 
-     -
lo0   16384 127.0.0.0/8   127.0.0.1           111523     -   111523 
-     -
bridg  1500 <Link#7>      d6:9b:35:b7:7c:bd 92627892     0 131886570 
  0     0
bridg  1500 192.168.0.0/2 192.168.0.1         231764     -   146544 
-     -
wlan0  1500 <Link#8>      00:0b:6b:83:59:25 81345984     0 77084603 
192714     0
wlan1  1500 <Link#9>      00:0b:6b:83:59:25        0     0        0 
0     0
tun0   1454 <Link#10>                       138915852     0 102337216 
   0     0
tun0   1454 210.138.216.5 210.138.216.50     7709196     - 10317194 
-     -


randy