I have a k8n mobo as well. I built support for my integrated NIC into the kernel, but the module forcedeth can also be used.
Code:
# modprobe forcedeth
may help with loading the driver. Then issue
Code:
# dhclient eth0
to use DHCP (almost all home routers use this). And if this doesn't work, please post the output of
Code:
# lspci -v
.