角色                ip地址               网关
dhcp服务器    192.168.8.81    192.168.8.1
客户机1          动态获取           192.168.8.81
客户机2          192.168.8.99    192.168.8.81

yum  -y  install  dhcp

b. 更改配置文件：vim /etc/dhcp/dhcpd.conf

default-lease-time 600;
max-lease-time 7200;
subnet 192.168.8.0 netmask 255.255.255.0 {
range 192.168.8.90 192.168.8.100;
option routers 192.168.8.1;
}
host printer {
hardware ethernet 00:0c:29:48:c5:a2;
fixed-address 192.168.8.99;
}

c. 启动服务：

systemctl  start  dhcpd

TYPE=Ethernet
BOOTPROTO=dhcp
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=eth0
DEVICE=eth0
ONBOOT=yes
GATEWAY=192.168.8.81  #网关一定要设置成dhcp服务器的ip地址
NETMASK=255.255.255.0
DNS1=8.8.8.8
DNS2=114.114.114.114

b. 重启网络服务：

systemctl  restart  network

ip  a

b. 客户机2：

ip  a