Not to be rude, but have you RTFM?
alias eth0 nvnet
in /etc/modules.conf and issue the command manually or restart the
And proceed to make sure your networking components check out in BIOS.
Do 'modinfo nvnet' and 'lsmod', does nvnet list as being there? If yes,
good, otherwise you'll want to remake the module by entering into kernel
sources and issuing the 'make modules' command.