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Re: [Xen-users] 'Wandering' eth interface - Xen 3.0.4 + linux

  • To: tim.post@xxxxxxxxxxx, "Xen users mailing list" <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: TMC <tmciolek@xxxxxxxxx>
  • Date: Tue, 1 May 2007 07:12:21 +1000
  • Delivery-date: Mon, 30 Apr 2007 14:10:54 -0700
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>

My bad. I did forget that udev indeed does some persistance magic.

mac assignment works well.

Thanks for all the responses.

On 01/05/07, Tim Post <tim.post@xxxxxxxxxxx> wrote:
On Tue, 2007-05-01 at 01:09 +1000, TMC wrote:

> I have a Xen 3.0.4 with Debian Etch (4.0) running quite successfully...
> except for an annoying problem, which i have not observed in other
> DomU instances, nor have I observed it with my test server...
> The problem I am observing in that one domain is that on reboot, the
> eth interface seems to "wander" - that is  monotonically increase the
> index value...
> so on one reboot  it will be eth0 on next eth1, on one after that eth3
> and so on.
> Of course this causes all sorts of scripts to fail, and manual
> intervention is required.
> has anyone else seen this misbehaviour?
> Is there a method of pinning or making this behaviour consistent?
> Tomasz

You may want to imply a mac to eth scenario in udev if this problem
occurs mostly in guests with multiple nics.

I *think* I understand your problem but not quite sure. Try googling for
'xen udev mac nic' to see a  plethora of examples.


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