hosts on bridged wlan can not reliably see each other

[Sam Leffler]

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.

	Sam