netdev - Re: [Qemu-devel] macvlan/macvtap: guest/host cannot communicate when network cable is unplugged

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Message-ID: <CAJSP0QX3zOz-EXnHQyrxXfXBjEDi4-8sBR-rgQxFdg8wZtRisA@mail.gmail.com>
Date:	Fri, 31 Aug 2012 06:34:09 +0100
From:	Stefan Hajnoczi <stefanha@...il.com>
To:	ching <lsching17@...il.com>
Cc:	qemu-devel@...gnu.org, kaber@...sh.net,
	"Michael S. Tsirkin" <mst@...hat.com>, netdev@...r.kernel.org
Subject: Re: [Qemu-devel] macvlan/macvtap: guest/host cannot communicate when
 network cable is unplugged

On Thu, Aug 30, 2012 at 11:32 PM, ching <lsching17@...il.com> wrote:
>
>>> I also perform an additional test: the guests (macvtap bridge mode) CAN communicate each other no matter network cable is plugged or not.
>> Strange.  I thought the original problem was that the macvtap guests
>> cannot communicate with each other when the network cable is
>> unplugged?
>>
>> Hopefully someone else can help you, I'm not familiar enough with
>> macvlan/macvtap.
>>
>> Stefan
>>
>
> My word may be a little bit confusing, it should be
>
> I also perform an additional test: I created two qemu guests (macvtap bridge mode on eth0), they CAN communicate each other no matter network cable of the host is unplugged or not.
>
> and my problem is specified in the subject already: guest/host cannot communicate when network cable is unplugged
>
>
> if my configuration seems correct, i may file a kernel bugzilla and seek for their advice.

Yes.  If no one else responds then it's worth filing a bug.

Stefan
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