Setting Fixed IP for Specific Hosts

When you need to have to fix ip for some systems  but supplied through DHCP
We need to add specific sections in /usr/local/etc/dhcp.conf

Add the following to /usr/local/etc/dhcp.conf
host {
hardware ethernet ;
fixed-address ;
option domain-name-servers ;
option domain-name "";
option routers ;
}

Ok save and quit the file
restart dhcpd
#/usr/local/etc/rc.d/isc-dhcpd restart

Ok there you go!
Enjoy! :)