From owner-freebsd-net@FreeBSD.ORG  Wed May  8 02:49:59 2013
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Date: Tue, 07 May 2013 19:49:49 -0700
From: "Marc G. Fournier" <scrappy@hub.org>
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To: freebsd-virtualization@freebsd.org, freebsd-net@freebsd.org
Subject: Re: VirtualBox + FreeBSD 9-STABLE == Frozen Ethernet
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On 2013-05-06 2:49 PM, Norbert Beckmann wrote:
> To Marc G. Fournier
>
> I do not think it's an issue with VirtualBox. I am running VirtualBox
> under Solaris. And I never had problems with it.
> Guests: ubuntu, Windows 7, Linux Mint, FreeBSD, Chrome OS.
> But the people of VirtualBox themselves state that Windows is somewhat
> delicate (don't remember whether they meant as guest or as host, I 
> think both).
> Which would be comprehensible, because Windows has never become a real
> multi user / multi process system as Unix was by birth (nearly).
> I can neither help concerning the freezing Ethernet nor did I encounter
> similar things (as far as I remember).
My first thought is that its something in the vboxnet kernel module when 
using a bridge ... I think the problem has been getting progressively 
worse, with each upgrade, but since I upgrade both vBox and the kernel 
in tandem, I'm currently working on going 'back in time' with the code, 
see if I can find some 'stable point' ...

If anyone with more knowledge can suggest any commands I can run to 
provide debug info, or such ... ?  I don't mind debugging, just dont' 
know what to provide that is useful ...