Assign IP address and hostname via kernel parameter

Hi,

is there a way to configure IP address and hostname on freebsd systems
via kernel command line parameters?

I have some freebsd systems in as xen domU's and it would be really
great to be able to set the ip address & hostname within the
configuration file for the domU.

I'm aware that I could configure a static mac address and use DHCP, but
with several layer2 segments on different XEN hosts setting up DHCP
correctly would be a real pain ;-)

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Regards
Mr. Olli