----- Original Message -----
From: "Kevin Maziere Aubry" <kevin.maziere@alterway.fr> To: "Igor Lvovsky" <ilvovsky@redhat.com> Cc: "Dor Laor" <dlaor@redhat.com>, "Michael Tsirkin" <mtsirkin@redhat.com>, users@ovirt.org Sent: Wednesday, October 3, 2012 8:35:04 AM Subject: Re: [Users] Question about network card order
Thanks for your reply.
2012/10/3 Igor Lvovsky < ilvovsky@redhat.com >
----- Original Message -----
From: "Kevin Maziere Aubry" < kevin.maziere@alterway.fr > To: users@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
Wouldn't it be possible to write some matching rules in: /etc/udev/rules.d/70-persistent-net.rules for your template so you would have it consistent. Mind that you should not rename to the kernel eth namespace. Best, Toni
Regards, Igor
Thanks
Kévin
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Kevin Mazière Responsable Infrastructure Alter Way – Hosting 1 rue Royal - 227 Bureaux de la Colline 92213 Saint-Cloud Cedex Tél : +33 (0)1 41 16 38 41 Mob : +33 (0)7 62 55 57 05 http://www.alterway.fr
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