No network in Linux from scratch 7.6 systemd

I completed LFS and boots but I'm not able to get the networking work. When i do a ifconfig it list the lo that is the loop back network but doesn't detect eth0 also says do doesn't exist. If i do a ifconfig -a it lists sit0 as well but don't know whats that for. I also enabled the network drivers for realtex but still not working. Any suggestions guys.