DHCP服务器

mount /dev/cdrom /media/cdrom                                  挂载光盘
rpm -ivh /media/cdrom/Server/dhcp-3.0.5-3.el5.i386.rpm         安装软件包
vi /etc/dhcpd.conf                                             编辑配置文件

多网段dhcp服务器配置文件内容

ddns-update-style none;     动态DNS更新模式       
default-lease-time 21600;   默认租约时间
max-lease-time 43200;       最大租约时间
option domain-name   "benet.com";    默认搜索区域
option domain-name-servers 202.106.0.20,202.106.148.1;   DNS服务器地址

subnet 192.168.1.0 netmask 255.255.255.0 {              声明设置子网
      range 192.168.1.20 192.168.1.200;                 用于分配的地址池
      option subnet-mask 255.255.255.0;                 用于分配的子网掩码
      option routers      192.168.1.1;                  默认分配的网关
  
host server01 {                                         设置保留IP
              hardware ethernet 00:00:00:00:00:00;      所保留主机的MAC
              fixed-address 192.168.1.254;              MAC对应的IP
                                     }
                                          }
subnet 192.168.2.0 netmask 255.255.255.0 {
      range 192.168.2.20 192.168.2.200;
      option subnet-mask 255.255.255.0;
      option routers      192.168.2.1;
  
host server00 { 
              hardware ethernet 00:00:00:00:00:00;
              fixed-address 192.168.2.254;
                                     }
                                          }
subnet 192.168.3.0 netmask 255.255.255.0 {
      range 192.168.3.20 192.168.3.200;
      option subnet-mask 255.255.255.0;
      option routers      192.168.3.1;
  
host server02 { 
              hardware ethernet 00:00:00:00:00:00;
              fixed-address 192.168.3.254;
                                     }
                                          }
注：后面是不同网段的配置，配置文件以“;”结束。

service dhcpd start   开启dhcp服务

客户机验证。

如果服务器是多网卡的，想要指定其中一块网卡提供服务（默认多个网卡同时提供服务），可以修改“/etc/sysconfig/dhcpd”

vi /etc/sysconfig/dhcpd
DHCPDARGS= "eth0"     指定从eth0网卡提供服务