一、需求
1． 创建一个基于 192.168.10.88/26 网段的 DHCP 服务器
2． 地址池为本子网网段的所有有效地址
3． 网关为本子网网段的最大 IP 地址
4． 保留主机，主机名 www ，其 IP 地址为 192.168.10.68 ，其 MAC 地址为：11:14:56:38:D3:ED
二、实验配置文件
1．/etc/dhcpd.conf
2．/usr/share/doc/dhcp-3.0.1/dhcpd.conf.sample
3．/etc/sysconfig/dhcpd
三、配置主配置文件
[root@linux etc]# ipcalc -bmn 192.168.10.88/26
NETMASK=255.255.255.192
BROADCAST=192.168.10.127
NETWORK=192.168.10.64
[root@linux etc]#vi /etc/dhcpd.conf
[root@linux etc]# grep -v "#" /etc/dhcpd.conf
ddns-update-style interim;
ignore client-updates;
subnet 192.168.10.64 netmask 255.255.255.192 {
option routers 192.168.10.126;
#默认网关
option subnet-mask 255.255.255.192;
#子网掩码
option domain-name "gd-linux.com";
#域名
option domain-name-servers 192.168.10.7;
#域名服务器ip地址
range dynamic-bootp 192.168.10.65 192.168.10.126;
#可获得的ip地址范围
default-lease-time 21600;
#默认释放时间（秒）
max-lease-time 43200;
#默认最大释放时间（秒）
host www{
#保留主机名
hardware ethernet 11:14:56:38:D3:ED;
fixed-address 192.168.10.68;
#保留主机的mac和ip地址
}
}
四、启动dhcp服务
[root@linux etc]# vi /etc/sysconfig/dhcpd
[root@linux etc]# cat /etc/sysconfig/dhcpd
# Command line options here
DHCPDARGS="eth0"
[root@linux etc]#ifconfig eth0 192.168.10.67 netmask 255.255.255.192
[root@linux etc]# service dhcpd start
启动 dhcpd [ 确定 ]
[root@linux etc]# ps -aux |grep dhcpd
Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.3/FAQ root 7780 0.0 0.2 4024 1524 ? Ss 13:37 0:00 /usr/sbin/dhcpd eth0 root 7804 0.0 0.1 5564 692 pts/1 R+ 13:43 0:00 grep dhcpd
[root@linux etc]# netstat -anup |grep :67
udp 0 0 0.0.0.0:67 0.0.0.0:* 7780/dhcpd
五、在linux客户端测试
[root@localhost ~]# dhclient
[root@localhost dhcp]# cat /var/lib/dhcp/dhclient.leases
lease {
interface "eth0";
fixed-address 192.168.10.125;
option subnet-mask 255.255.255.192;
option routers 192.168.10.126;
option dhcp-lease-time 21600;
option dhcp-message-type 5;
option domain-name-servers 192.168.1.7;
option dhcp-server-identifier 192.168.1.7;
option domain-name "gd-linux.com";
renew 1 2013/4/10 11:28:13;
rebind 1 2013/4/10 13:45:39;
expire 1 2013/4/10 14:30:39;
}
