On 02.07.2015 11:08, Christoph Pleger wrote:
> Hello,
> 
> I want to create a Debian Live DVD, with dracut as initrd tool. That is, I
> already had the Live system running successfully, but IP configuration had
> to be entered manually after boot from DVD. The grub menuitem for that
> contains the following line to define the kernel and its parameters:
> 
> linux   /vmlinuz root=/dev/cdrom ro aufs
> 
> Then, I had the idea to add an option for automatic IP configuration by
> DHCP. I expected it to work by adding a new grub menuitem with the
> following line for the kernel:
> 
> linux   /vmlinuz root=/dev/cdrom ip=dhcp ro aufs
> 
> But that does not work, no configuration is set for eth0. But if the
> chroot-Directory I created the DVD from is taken as NFSROOT and the
> computer is booted by PXE, with the following in pxelinux.cfg/default
> 
> DEFAULT vmlinuz initrd=initrd.img root=dhcp ip=dhcp ro aufs
> 
> then eth0 gets its configuration from DHCP.
> 
> So, does dracut only support automatic IP configuration by DHCP if
> "root=dhcp" is set, or is there something I can change in the kernel
> parameters to make automatic IP configuration work when booting from DVD?
> 
> Regards
>   Christoph
> 
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try "ip=dhcp rd.neednet=1"
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