Re: Issues with dracut and network device naming

[Hans de Goede <hdegoede@redhat.com>]

Hi all,

On 08/28/2009 04:36 PM, Jon Masters wrote:
> On Fri, 2009-08-28 at 14:14 +0200, Hans de Goede wrote:
>
>> When using iscsi for example, an interface name (usually eth#) is
>> specified on the dracut cmdline, but if a machine has multiple nics
>> the probe order done by dracut may very well differ as the one
>> which was used during install when the dracut cmdline gets generated.
>
> It's worth talking to Prarit about this stuff because he's looking into
> persistent network device naming issues in general. I'm sure you know,
> but there's a generic DMI extension that allows you to determine from
> the system what the PCI slot->device name mapping should be so that e.g.
> moving the disk from one system to another doesn't affect the naming.
>
> Of course this only works on systems with the requisite SMBUS/DMI
> extension *but* it will (eventually) be a nice solution to the naming
> issues and worth working with him on if you're not already.
>

Hmm, well I really want to have something in place soon, and currently
all Fedora persistent network device naming is done based on MAC.

But I would like to keep possibilities like this open for the future, so
I'll go ahead and implement Seewer's suggeston to use a separate cmdline
arg for this called ifname, for now we will then have / use:
ifname=eth0:aa:bb:cc:dd:ee:ff

But in the future it could also be something like for example:
ifname=eth0:/sys/devices/bus/pci/00:00:00:01.5

Regards,

Hans