install： yum - y install dhcp
modify ：
vim /etc/dhcp/dhcpd.conf
ddns-update-style none;
ignore client-updates;
subnet 10.0.0.0 netmask 255.0.0.0 {
range 10.0.0.100 10.0.0.200;
option domain-name-servers 202.96.209.133,116.228.111.18;
option routers 10.0.0.1;
default-lease-time 600;
max-lease-time 7200;
}
start：service dhcpd start
prepare：ifconfig eth0 10.0.0.1 NETMASK 255.0.0.0