Xen users - Aug 2005 - dom0 bootup -- Device eth0 has differet mac address than expected

CentOS 4.1, Xen 2.0.7. My dom0 is booting up but can''t get to the
outside network because eth0 won''t start due to, apparently, Xen
providing a different mac address than expected. How do I tell Xen to start eth0
at the bootup with a specific mac address that lines up with the HWADDR= line in
my ifcfg-eth0? Note that a normal bootup into CentOS 4.1 outside of the Grub Xen
bootup works fine since it''s sensing the mac address of the NIC in the
machine rather than what I suspect is a virtualized mac address that Xen
provides upon a Xen bootup. I''ve tried removing the HWADDR= lline in
ifcfg-eth0 but that just makes the complaint different and eth0 won''t
startup at all inside or outside of Xen. Is there someplace in the vif-bridge
script to hardcode this required mac address to line it up with the ifcfg-eth0
HWADDR= mac address or is the place to hardcode a fixed mac address for dom0
located somplace else?

Thanks for your help.

Datto


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datto@charter.net wrote:
>CentOS 4.1, Xen 2.0.7. My dom0 is booting up but can''t get to the
outside network because eth0 won''t start due to, apparently, Xen
providing a different mac address than expected. How do I tell Xen to start eth0
at the bootup with a specific mac address that lines up with the HWADDR= line in
my ifcfg-eth0? Note that a normal bootup into CentOS 4.1 outside of the Grub Xen
bootup works fine since it''s sensing the mac address of the NIC in the
machine rather than what I suspect is a virtualized mac address that Xen
provides upon a Xen bootup. I''ve tried removing the HWADDR= lline in
ifcfg-eth0 but that just makes the complaint different and eth0 won''t
startup at all inside or outside of Xen. Is there someplace in the vif-bridge
script to hardcode this required mac address to line it up with the ifcfg-eth0
HWADDR= mac address or is the place to hardcode a fixed mac address for dom0
located somplace else?
>
>  
>
On your dom-U config file, add something like
vif = [''mac=AA:00:4D:AB:4B:4D,bridge=xen-br0'']

Run "xm help create" for details.

Regards,

Fajar


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I think he''s having problems with Dom0 changing Mac address, rather
than the
domU (is that right?)

Does the original machine have more than one ethernet device?  Perhaps Linux 
is enumerating the cards in a different order when running under Xen so 
you''re not using the card you think you are?

Cheers,
Mark

On Monday 29 August 2005 03:29, Fajar A. Nugraha wrote:
> datto@charter.net wrote:
> >CentOS 4.1, Xen 2.0.7. My dom0 is booting up but can''t get to
the outside
> > network because eth0 won''t start due to, apparently, Xen
providing a
> > different mac address than expected. How do I tell Xen to start eth0
at
> > the bootup with a specific mac address that lines up with the
HWADDR> > line in my ifcfg-eth0? Note that a normal bootup into CentOS 4.1
outside
> > of the Grub Xen bootup works fine since it''s sensing the mac
address of
> > the NIC in the machine rather than what I suspect is a virtualized mac
> > address that Xen provides upon a Xen bootup. I''ve tried
removing the
> > HWADDR= lline in ifcfg-eth0 but that just makes the complaint
different
> > and eth0 won''t startup at all inside or outside of Xen. Is
there
> > someplace in the vif-bridge script to hardcode this required mac
address
> > to line it up with the ifcfg-eth0 HWADDR= mac address or is the place
to
> > hardcode a fixed mac address for dom0 located somplace else?
>
> On your dom-U config file, add something like
> vif = [''mac=AA:00:4D:AB:4B:4D,bridge=xen-br0'']
>
> Run "xm help create" for details.
>
> Regards,
>
> Fajar
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
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