sudo vi /etc/sysconfig/networking-scripts/ifcfg-eth0

change BOOTPROTO to BOOTPROTO="static"

DEVICE="eth0"
BOOTPROTO="static"
BROADCAST="192.168.254.255"
DNS1="192.168.254.25"
GATEWAY="192.168.254.254"
HWADDR="F2:24:08:AE:93:10"
IPADDR="192.168.254.236"
NETMASK="255.255.255.0"
ONBOOT="yes"
TYPE="Ethernet"

sudo service network restart

vi /etc/systemd/network/99-dhcp.network

[NETWORK]
DHCP=yes

[NETWORK]
DHCP=NO