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Date: Wed, 3 Feb 2016 16:56:14 +0300
From: Slawa Olhovchenkov <slw@zxy.spb.ru>
To: Peter =?utf-8?Q?Ankerst=C3=A5l?= <peter@pean.org>
Cc: freebsd-current@freebsd.org
Subject: Re: arp flapping after udating system to 11-CURRENT.
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On Wed, Feb 03, 2016 at 08:31:43AM +0100, Peter Ankerstål wrote:

> Hi!
> 
> I recently upgraded my system to 11-CURRENT (FreeBSD 11.0-CURRENT #0 
> r295087: Sun Jan 31 10:21:31 CET 2016) and after that all of my other 
> devices in the network complains about arp-flapping:
> 
> arp: 172.25.0.1 moved from 00:00:24:d0:9e:5d to 02:e8:ea:15:66:00 on re0
> arp: 172.25.0.1 moved from 02:e8:ea:15:66:00 to 00:00:24:d0:9e:5d on re0
> arp: 172.25.0.1 moved from 00:00:24:d0:9e:5d to 02:e8:ea:15:66:00 on re0
> 
> 
> It seems to be flapping between the virtual mac of my bridge interface 
> and the actual mac adress on the physical interface. This was not the 
> case when i ran FreeBSD 10.2. Is there some settings I need to do?

I am see this on FreeBSD 10. And FreeBSD 9.
Only switch to ng_bridge remove this for me.