dhcp动态配置

 

配置dhcp服务器：(rhel5)

１，  安装dhcp 服务器软件

#rpm –q dhcp  查看dhcp是否存在／

#mount  /dev/cdrom /media   挂载rhel5系统光盘

#rpm –vih /media/Server/dhcp-3.0.5-23.el5.i386.rpm

2,建立主配置文件/etc/dhcpd.conf

#cat/etc/dhcpd.conf

注: #see /usr/share/doc/dhcp*/dhcpd.conf.sample#模板文件

#vim/etc/dhcpd.conf

ddns-update-style none;       //禁用ＤＮＳ动态更新

．．．．

subnet 192.168.1.0 netmask 255.255.255.0 {     //网段声明

range              192.168.1.20 192.168.1.50 ;

  optionsubnet-mask   255.255.255.0;

  optionrouters      192.168.1.254;

  optiondomain-name “hzq.com”;

  optiondomain-name-servers 202.106.0.20, 202.106.148.1;

 default-lease-time 21600;

  max-lease-time  43200;

   }

host pc1 {

  hardware Ethernet00:co:c3:22:46:81;

  fixed-adderss192.168.1.30;

}

#dhcpd        //检查dhcp配置是否的错！

#sevice dhcpd start

#netstat –anpu | grep “:67”    //dhcp是udp的６７号端口

注：

日志文件：/var/log/message

租约文件：/var/lib/dhcpd/dhcpd.lease

dhcp客户端

#vim/etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0

ONBOOT=yes

BOOTPROTO=dhcp

#ifdown eth0 ; ifup eth0

注;

Linux客户机可使用dhclient工具测试dhcp服务器；由软件包　dhclient-3.0.5-23.el5.i386.rpm提供；直接执行dhclient命令；

#dhclient –d eth0   //网卡eth0自动获取新的ip地址

#dhclient –r eth0   //释放之前为eth0获取ip租约