Centos7.4/RHEL7.4-Linux搭建DHCP服务器&使用客户端获取IP

实验环境:RHEL7.4最小化安装

拓扑图：

[root@Yang ~]# yum install dhcp -y

[root@Yang ~]# cp /usr/share/doc/dhcp-4.2.5/dhcpd.conf.example /etc/dhcp/dhcpd.conf

cp: overwrite ‘/etc/dhcp/dhcpd.conf’? y --生成配置文件

[root@Yang ~]# vim /etc/dhcp/dhcpd.conf ---写入下面内容

subnet 192.168.127.0 netmask 255.255.255.0 {

range 192.168.127.160 192.168.127.170;

option domain-name-servers 192.168.127.2;

option domain-name 'Yang dhcp server';

option routers 192.168.127.2;

option broadcast-address 192.168.127.254;

default-lease-time 600;

max-lease-time 7200;

}

[root@Yang ~]# systemctl start dhcpd ---启动服务

[root@Yang ~]# systemctl status dhcpd ---查看服务状态

● dhcpd.service - DHCPv4 Server Daemon

Loaded: loaded (/usr/lib/systemd/system/dhcpd.service; disabled; vendor preset: disabled)

Active: active (running) since Mon 2018-02-05 07:21:33 EST; 1min 1s ago

Docs: man:dhcpd(8)

man:dhcpd.conf(5)

Main PID: 1548 (dhcpd)

Status: 'Dispatching packets...'

CGroup: /system.slice/dhcpd.service

└─1548 /usr/sbin/dhcpd -f -cf /etc/dhcp/dhcpd.conf -user dhcpd -group dhcpd --no-pid

Feb 05 07:21:33 Yang dhcpd[1548]: No subnet declaration for ens38 (no IPv4 addresses).

Feb 05 07:21:33 Yang dhcpd[1548]: ** Ignoring requests on ens38. If this is not what

Feb 05 07:21:33 Yang dhcpd[1548]: you want, please write a subnet declaration

Feb 05 07:21:33 Yang dhcpd[1548]: in your dhcpd.conf file for the network segment

Feb 05 07:21:33 Yang dhcpd[1548]: to which interface ens38 is attached. **

Feb 05 07:21:33 Yang dhcpd[1548]:

Feb 05 07:21:33 Yang dhcpd[1548]: Listening on LPF/ens33/00:0c:29:94:69:9c/192.168.127.0/24

Feb 05 07:21:33 Yang dhcpd[1548]: Sending on LPF/ens33/00:0c:29:94:69:9c/192.168.127.0/24

Feb 05 07:21:33 Yang dhcpd[1548]: Sending on Socket/fallback/fallback-net

Feb 05 07:21:33 Yang systemd[1]: Started DHCPv4 Server Daemon.

此时服务端配置成功

客户端口设置为dhcp，并重新启动网络服务就可以获取到分配的IP，如下图所示