Re: [Xen-users] Slackware 12 DomU NIC increments on each start

[Nico Kadel-Garcia <nkadel@xxxxxxxxx>]

Florian Heigl wrote:
> Hi all,
>
> just a little proposal ;)
>
> 2007/11/16, Tom Brown <xensource.com@xxxxxxxxxxxxxxxxxxx>:
>   
> > On Fri, 16 Nov 2007, Steve Kemp wrote:
> >
> >     
> > > On Fri Nov 16, 2007 at 13:21:58 -0000, Russell Packer wrote:
> > >
> > >       
> > > > The problem is that networking doesn't work properly. Each time I
> > > > shutdown and restart, the NIC increments... eth0, eth1, eth2... I'm on
> > > > eth12 right now! Once the system starts I can use ifconfig & route to
> > > > assign an IP and a default gateway, and I get a network connection.
> > > > Weird stuff.
> > > >
> > > > Does anyone have any ideas what is going on / what I need to do? I just
> > > > want my nice eth0...
> > > >         
> > >  This is almost certainly udev being "helpful".
> > >       
> > I suspect it's kudzu ... which IMHO is not really appropriate on domUs and
> > should be disabled, but I don't like/trust automagic... With kudzu turned
> > off (chkconfig kudzu off) and making sure there is no MAC= line in your
> > /etc/sysconfig/network-scripts/ifcfg-eth0 file, you should be ok even if
> > the mac address is changing.... at least this is true for my old and new
> > redhat based systems. -Tom
> >     
> I posted about this like half a year ago, and still think it would be
> the best if there was
> some xen magic to save back the GUID and MAC autogenerated on first
> startup into the
> domU config.
>   
It's possible to run "xm list --long [DOMAIN]" to extract them. It's 
better to preset them, if possible, to avoid conflicts among a large 
cluster of guest domains. Some tools, like virt-install from RedHat, can 
prescribe MAC addresses. But I wanted the vifname too, to make MRTG 
network monitoring report the same interface consistently the last time 
I did this, and wound up writing a little wrapper to hardcode those.

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