Got it, need to be nodhcp, not NODHCP in the cmdline.txt.
Than need to be set the default route and dns in the bootlocal.sh:
route add default gw 192.168.1.1
echo nameserver 192.168.1.1 >> /etc/resolv.conf
The nameserver may be the one given by the your local ISP and depends on the network structure if it is translated by your WAN router, or not. You may use several lines if needed.
Greg, yes, if there is DHCP server on the network than it's better, but I have this LMS on the subnet and there are only switches and static addressing.