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Date:      Fri, 16 Jan 2004 16:20:46 +0100 (CET)
From:      "Per Engelbrecht" <per@xterm.dk>
To:        <rd@tilde.se>
Cc:        freebsd-ipfw@freebsd.org
Subject:   Re: Arps when bridged.
Message-ID:  <36682.62.242.151.142.1074266446.squirrel@mailbox.wingercom.dk>
In-Reply-To: <00c001c3dc19$5d033410$7901010a@nyalaptopen>
References:  <00c001c3dc19$5d033410$7901010a@nyalaptopen>

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Hi Rickard
This is more of 'net' problem than 'ipfw' but anyway, don't disable
'arp'.When sending a piece of your log, please also include the (in this case)
'ifconfig' and 'sysctl.conf' !
I could be wrong, but it seems more likely that you're having a loop.
Read 'man bridge(4)' the last paragraph above the 'examples' section.

If your bridging from a performance point of view, then have a look at
'ngctl' aswell http://bsdvault.net/sections.php?op=viewarticle&artid=98
Only downfall is when it's used in conjunktion with HP Procurve
switches -they don't like the idea "two identical" mac-addresses!

Regards
/per
per@xterm.dk

> Hi,
>
> I'm getting these messages. I have three interfaces, one uses DHCP
> and the other two are bridged.
>
> Here is the log I get:
>
> Jan 16 10:13:57 testburk /kernel: arp: 00:10:f3:03:44:69 is using
> my IP address 10.1.1.69! Jan 16 10:13:57 testburk /kernel: arp:
> 00:10:f3:03:44:6a is using my IP address 10.1.1.69! Jan 16 10:14:47
> testburk /kernel: arp: 00:10:f3:03:44:69 is using my IP address
> 10.1.1.69! Jan 16 10:14:47 testburk /kernel: arp: 00:10:f3:03:44:6a
> is using my IP address 10.1.1.69! Jan 16 10:57:31 testburk /kernel:
> arp: 00:10:f3:03:44:69 is using my IP address 10.1.1.69! Jan 16
> 10:57:31 testburk /kernel: arp: 00:10:f3:03:44:6a is using my IP
> address 10.1.1.69! Jan 16 11:03:06 testburk /kernel: arp:
> 00:10:f3:03:44:69 is using my IP address 10.1.1.69! Jan 16 11:03:06
> testburk /kernel: arp: 00:10:f3:03:44:6a is using my IP address
> 10.1.1.69! Jan 16 11:06:40 testburk /kernel: arp: 00:10:f3:03:44:69
> is using my IP address 10.1.1.69! Jan 16 11:06:40 testburk /kernel:
> arp: 00:10:f3:03:44:6a is using my IP address 10.1.1.69!
>
> What is the problem and does anyone know if ifconfig fxp1 -arp
> should stop this?
>
> Thanks, Rickard.
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