Re: Interfaces connected by bridge(4) do not pass arp replies

From: Kim Culhan <w8hdkim_at_gmail.com>
Date: Mon, 29 Oct 2012 16:55:58 -0400
On Mon, Oct 29, 2012 at 3:59 PM, Monthadar Al Jaberi
<monthadar_at_gmail.com> wrote:
> On Mon, Oct 29, 2012 at 8:46 PM, Kim Culhan <w8hdkim_at_gmail.com> wrote:
>> With 2 interfaces present on a bridge0, an arp request is send from
>> msk0 and is received
>> by a machine on em0.
>>
>> When a reply to that arp request is sent by a machine on em0 it is not
>> visible on the
>> bridge0 nor on msk0 as indicated by tcpdump.
>>
>> The arp reply is visible while watching em0 with tcpdump.
>
> Is em0 set in promisc mode?
>
>>
>> This behaviour is also true when arp requests are sent from a wlan
>> interface ath0
>> and received on a wired interface, the arp reply is visible on the
>> wired interface but not
>> visible monitoring with 'tcpdump -i bridge0 arp'.
>
> Hmm, I am briding between ath0 and wired (arge0).
>
> Can you provide more info? what is your rc.conf? How does it set the interfaces?
> Can you give ifconfig output?
> The are reply that you dont see on bridge0 can you dump it from wired
> interface?

What svn revision of FreeBSD -current are you running?

>> The machine running the em0, msk0 and ath0 interfaces and bridge0 can
>> receive arp requests
>> from any interface and the arp replies are received fine from the
>> machine by the arp requester -err requestor.
>>
>> Any help is greatly appreciated.
>>
>> thanks
>> -kim
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>
>
>
> --
> Monthadar Al Jaberi
Received on Mon Oct 29 2012 - 19:55:59 UTC

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