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Date: Thu, 27 Sep 2007 16:43:50 -0700
From: Sam Leffler <sam@errno.com>
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To: Randy Bush <randy@psg.com>
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Cc: FreeBSD Net <freebsd-net@freebsd.org>,
	Andrew Thompson <thompsa@freebsd.org>
Subject: Re: bridging ath
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Randy Bush wrote:
> Andrew Thompson wrote:
>   
>> On Wed, Sep 26, 2007 at 04:07:00PM -1000, Randy Bush wrote:
>>     
>>> current i386 thinkpad t41
>>>
>>> ifconfig_lo0="inet 127.0.0.1/8"
>>> cloned_interfaces="bridge0"
>>> ifconfig_bridge0="inet 192.168.0.3/24 addm em0 addm ath0 up"
>>> ifconfig_em0="up"
>>> ifconfig_ath0="ssid rgnet up"
>>> defaultrouter="192.168.0.1"
>>>
>>> with ether plugged in, i can ping it.  unplug ether and no ping over
>>> ath0.  other hosts are on same ssid and working.
>>>       
>> I will try to reproduce this in the weekend. Just to make sure, you are
>> pinging 192.168.0.3 from a remote wireless node connected to ath0, and
>> unplugging em0 causes this to fail?
>>     
>
> connect both wireless and ether.  it is pingable. disconnect ether.  no
> can ping.
>
> reduce to
>   ifconfig_ath0="inet 192.168.0.3/24 ssid rgnet up"
> with no em0, bridge, ... and it is pingable.
>   

Be sure apbridge is enabled so the 802.11 layer does intra-bss bridging; 
otherwise traffic must be fwd'd by a bridge component (should be on by 
default).  Also you can use tcpdump to check traffic on each interface 
to isolate the issue.

    Sam