[Users] Question about network card order

[Igor Lvovsky]

----- Original Message -----
> From: "Kevin Maziere Aubry" <kevin.maziere at alterway.fr>
> To: users at ovirt.org
> Sent: Wednesday, October 3, 2012 9:58:44 AM
> Subject: [Users] Question about network card order
> 
> 
> Hello
> 
> 
> My first email on the mailing, I hope the first one of a longue
> serie.
> 

Welcome to community :)

> 
> The email concerns a Network Card order issue for which I like to
> report a have your advises.
> 
> 
> I've made a template which contains 2 network cards, Each one bridge
> on different vlan network.
> When I create a VM from this template, the network card mac address
> assignation is random... so that by default my fedora assign eth0 to
> the smallest mac address, and so on for eth1/eth2 ...
> 
> 
> But no way to define network card order in template, so that sometime
> the smallest mac address is on eth0, sometime on eth1 (and in fact
> more often on eth1), sometime my VM works, sometime I have to
> destroy and recreate network interfaces.
> 
> 

Unfortunately it's a known issue that related mostly to guest kernel rather than RHEV-M.
This is not related to order of NICs during VM start, because RHEV-M keep the MAC assignment
and even PCI address assignment same over VM reboots.

The real reason hidden somewhere deep in kernel/udev  behaviour.
We need to understand why 2 NICs with same MAC addresses and same PCI addresses may get different names (eth0/eth1)
over machine reboot.

Michael, any ideas?

> Is there a workaround or anything else ?
>
 
No, I am not aware of any workaround


Regards,
    Igor

> 
> Thanks
> 
> 
> Kévin
> 
> 
> --
> 
> Kevin Mazière
> Responsable Infrastructure
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