this is obsolete doc -- see http://doc.nethence.com/ instead

Configuring a DHCP server on RHEL5/6 

Make sure you've got this package installed, 

rpm -q dhcp

Configure your daemon, 

cd /etc/

mv dhcpd.conf dhcpd.conf.dist

cat > dhcpd.conf <<EOF9

allow bootp;

ddns-update-style none;

allow unknown-clients;

subnet 192.168.X.0 netmask 255.255.255.0 {

        option domain-name "example.local";

        range 192.168.X.10 192.168.X.50;

        option subnet-mask 255.255.255.0;

        option routers 192.168.X.254;

        option domain-name-servers DNS1, 212.27.40.240, 212.27.40.241;

        option ntp-servers ntp.obspm.fr;

        next-server PXE_SERVER;

        filename "pxelinux.0";

        #option root-path "/tftpboot";

        #filename "/pxeboot_ia32.bin";

}

EOF9

apply, 

service dhcpd restart

chkconfig dhcpd on