DHCP服务器

配置 DHCP 客户端

vim /etc/sysconfig/network-scripts/ifcfg-ens33
	BOOTPROTO="dhcp"
systemctl restart network

1. 会自动启动 dhclient 服务 udp 68端口
2. /var/lib/dhclient/dhclient.leases dhcp客户端信息文件
3. 手动启动dhclient 是后台运行的

dhclient //后台运行
dhclient -d  //前台方式运行
nmcli device show ens33
nmcli connection show ens33

windows中命令

ipconfig/release 立即释放现在在从dhcp服务器获取的地址，优先旧的地址，重新申请ip
ipconfig/renew  强迫立即续约，获取一个新的租期

配置 DHCP 服务器

yum install dhcp -y

相关文件

/usr/lib/systemd/system/dhcpd.service
/usr/sbin/dhcpd
/etc/dhcp/dhcpd.conf

配置文件

option domain-name "xuepeng.com";
option domain-name-servers 180.76.76.76, 223.6.6.6;
default-lease-time 600;
max-lease-time 7200;
log-facility local7;
subnet 192.168.43.0 netmask 255.255.255.0 {
  range 192.168.43.100 192.168.43.200;
  range 192.168.43.210 192.168.43.220;
  option routers 192.168.43.2;
}
host centos7-43-17 {
option domain-name "study.com";
option domain-name-servers 8.8.8.8, 114.114.114.114;
default-lease-time 86400;
max-lease-time 864000;
hardware ethernet 00:0c:29:49:cb:28;
option routers 192.168.43.2;
fixed-address 192.168.43.206;
}

启动

 systemctl start httpd  // 会开启udp的67端口