I've built a Linux for a PC/104 module equipped with a Geode LX800. NIC is a Realtek 8139DL. In the kernel-config I chose the 8139TOO driver to be built in the kernel. It is possible to set the interface up via ifconfig eth0 up and to assign an IP address with ifconfig eth0 192.168.10.2 netmask 255.255.255.0 Unfortunately pinging another system is not possible. Every time I try it puts out a message like: [ 130.720092] 9139too 000:00:0e.0 eth0 link up, 100MBps, full-duplex, lpa 0xC5E1
This is not a Buildroot problem, but either a kernel problem or a hardware problem.