Re: [Xen-devel] [OSSTEST PATCH v2 07/19] ts-host-install: don't use the new nic naming scheme

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Fri, Dec 15, 2017 at 03:45:06PM +0000, Julien Grall wrote:
> 
> 
> On 12/12/17 15:15, Julien Grall wrote:
> > Hi Wei/Ian,
> 
> Hi,
> 
> > I have tried this series on Arm64 hardware. I am able to boot and
> > install Debian on AMD Seattle (laxton{0,1}). But I don't get network
> > when using Cavium Thunder-X (rochester{0,1}) after reboot.
> > 
> > Looking into more details, the interface naming is not the same between
> > the installer and after reboot. In the former, eth4 is used whilst the
> > latter uses eth5 for the same interface (USB network dongle).
> > 
> > I have tried to use 'interface force' property to impose eth4, without
> > much luck. The interface naming is still eth5 after reboot.
> > 
> > I was wondering if you have any idea how to solve the naming scheme issue?
> 
> I dug a bit more, so 'force interface' will create the
> /etc/udev/rules.d/70-persistent-net.rules for the installer initrd.
> 
> However, it does not get copied to the installed Debian. For the moment, I
> workaround this by copying the file in overlay/ so it get installed.
> 

I tried that as well, but that's wrong.

That would make the generated rule get copied in to the host initrd,
which ends up being used as the guests initrd (at least on x86), then
the guest will hijack the host's IP address (!).

> With that, I manage to get the network in the installed Debian. I guess this
> is not the right way. What would be the right way?
> 

See v3 of this series, which has a patch named:

Set mac address in interfaces(5) if force-mac-address is set

That should work on ARM, too. 

Wei.

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