1. 安装dhcp软件包
[root@server ~]# yum -y install dhcp
[root@server ~]# rpm -ql dhcp
/etc/dhcp
/etc/dhcp/dhcpd.conf //主配置文件
/etc/rc.d/init.d/dhcpd //启动脚本
/usr/sbin/dhcpd //二进制命
2. 修改配置文件
~~~powershell
vim /etc/dhcp/dhcpd.conf
option domain-name "itcast.cc"; //域名
option domain-name-servers 192.168.1.110, 8.8.8.8; //DNS(可以写多个)
default-lease-time 3600; //缺省租约
max-lease-time 7200; //客户端最大租约
log-facility local7; //定义日志设备载体 (/var/log/boot.log输出)
subnet 192.168.2.0 netmask 255.255.255.0 { //子网<网段>
range 192.168.2.1 192.168.2.50; //地址范围<地址池>
option routers 192.168.1.110; //网关
option broadcast-address 192.168.2.255 //广播地址
}
option domain-name "itcast.cc";
option domain-name-servers 8.8.8.8;
default-lease-time 3600;
max-lease-time 7200;
log-facility local7;
subnet 10.1.1.0 netmask 255.255.255.0 {
range 10.1.1.100 10.1.1.150;
option routers 10.1.1.1;
option broadcast-address 10.1.1.255;
}
[root@MissHou ~]# service dhcpd start
client端修改IP地址为动态获取:
[root@client ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0
[root@client ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
TYPE=Ethernet
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=dhcp
重启网络让client端自动获取IP地址:
[root@client ~]# service network restart
Shutting down loopback interface: [ OK ]
Bringing up loopback interface: [ OK ]
Bringing up interface eth0: Active connection state: activating
Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/8
state: activated
Connection activated
查看IP地址是否是指定的IP范围:
[root@client ~]# ifconfig eth1
eth1 Link encap:Ethernet HWaddr 00:0C:29:41:A2:FC
inet addr:10.1.1.100 Bcast:10.1.1.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe41:a2fc/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:17493870 errors:0 dropped:0 overruns:0 frame:0
TX packets:2271 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1319498963 (1.2 GiB) TX bytes:221741 (216.5 KiB)
出现问题解决方式
日志错误信息
~~~powershell
[root@server ~]# tail -f /var/log/messages
Apr 16 17:54:22 MissHou dhcpd: /etc/dhcp/dhcpd.conf line 16: semicolon expected.
Apr 16 17:54:22 MissHou dhcpd: }
Apr 16 17:54:22 MissHou dhcpd: ^
Apr 16 17:54:22 MissHou dhcpd: /etc/dhcp/dhcpd.conf line 16: unexpected end of file
Apr 16 17:54:22 MissHou dhcpd: }
Apr 16 17:54:22 MissHou dhcpd: ^
Apr 16 17:54:22 MissHou dhcpd: Configuration file errors encountered -- exiting
Apr 16 17:54:22 MissHou dhcpd: