基于linux搭建一个dhcp服务

项目环境:

        linux操作系统，centos7.9，dhcp

目的:搭建一个dhcp服务器

dhcp实验 搭建dhcp服务器，准备两台linux虚拟机(两边的网卡模式要一样,都是桥接)
    
1.下载dhcp对应的插件

[root@localhost named]# yum install -y dhcp

2.复制对应的配置文件到/etc/dhcp目录下

[root@localhost named]# cd /etc/dhcp
[root@localhost dhcp]# cp /usr/share/doc/dhcp*/dhcpd.conf.example ./dhcpd.conf

3.更改配置文件

[root@localhost dhcp]# vim dhcpd.conf
log-facility local7;
subnet 192.168.2.0 netmask 255.255.255.0 {  ==》更改为对应2网段,和子网掩码
  range 192.168.118.10 192.168.118.100;    ==》配置对应的ip池
  option domain-name-servers 114.114.114.114;  ==更改域名服务器
  option routers 192.168.118.2;     ====》更改为自己的路由
  default-lease-time 600;
  max-lease-time 7200;
}

4.启动网卡重新获得ip地址的方法

[root@localhost dhcp]# systemctl restart network

(客户机操作)
5.保存租约历史

[root@server ~]# dhclient -lf /var/lib/dhclient/dhclient.leases 

6.查看文件查看是否分的ip地址

[root@server ~]# cat /var/lib/dhclient/dhclient.leases

lease {
  interface "ens33";
  fixed-address 192.168.2.103;
  option subnet-mask 255.255.255.0;
  option routers 192.168.2.1;
  option dhcp-lease-time 600;
  option dhcp-message-type 5;
  option domain-name-servers 114.114.114.114;
  option dhcp-server-identifier 192.168.2.119;   ======》为我们设置的dhcp服务器地址,成功
  renew 5 2023/07/28 12:24:10;
  rebind 5 2023/07/28 12:28:55;
  expire 5 2023/07/28 12:30:10;
}
 

(在服务器操作查看)
7.在dhcp服务器端看给哪些客户机分配了ip地址
[root@localhost sc]# cat /var/lib/dhcpd/dhcpd.leases
lease 192.168.2.103 {
  starts 5 2023/07/28 12:24:25;
  ends 5 2023/07/28 12:34:25;
  cltt 5 2023/07/28 12:24:25;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 00:0c:29:11:71:40;
  client-hostname "server";
}