Linux下搭建dhcp服务

实验前提：

1.所有试验机在相同网络

2.DHCP服务器有固定ip

实验步骤：

1. 配置ip

[root@localhost Server]# cat /etc/sysconfig/network-scripts/ifcfg-eth0

# Intel Corporation 82545EM Gigabit Ethernet Controller (Copper)

DEVICE=eth0

BOOTPROTO=static

ONBOOT=yes

IPADDR=192.168.4.5

HWADDR=00:0c:29:62:2b:78

[root@localhost Server]# cat /etc/resolv.conf 

; generated by /sbin/dhclient-script

nameserver 202.106.0.20

nameserver 192.168.4.5

search  dhcpser.tarena.com

2.安装软件包

    

[root@localhost Server]# yum -y install dhcp-3.0.5-31.el5_8.1.x86_64.rpm 

3.修改配置文件

    

[root@localhost Server]# cat /etc/dhcpd.conf 

ddns-update-style none;

subnet 192.168.4.0 netmask 255.255.255.0 {

        option routers                  192.168.4.5;

        option subnet-mask              255.255.255.0;

        option domain-name              "tarena.com";

        option domain-name-servers      192.168.1.1;

        option time-offset              -18000;

        range 192.168.4.100 192.168.4.200;

        default-lease-time 21600;

        max-lease-time 43200;

        next-server 192.168.1.1;

        filename "pxelinux.0";

}

4. 启动服务

[root@dhcpser ~]# rpm -ql dhcp | grep init.d

/etc/rc.d/init.d/dhcpd

/etc/rc.d/init.d/dhcrelay

[root@dhcpser ~]# service dhcpd restart

[root@dhcpser ~]# chkconfig dhcpd on

注：如果启动失败，可以检测主配置文件语法

[root@dhcpser ~]# service dhcpd configtest

5. 验证

Linux：

# dhclient -d eth0临时获取

# dhclient -r eth0释放

Windows：

cmd>ipconfig /release释放ip

cmd>ipconfig /renew重新获取ip