DHCP的配置文档

1、配置YUM

vim /etc/yum.repos.d/rhel-debuginfo.repo

[rhel-debuginfo]
name=Red Hat Enterprise Linux $releasever - $basearch - Debug
baseurl=file:///misc/cd/Server
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release

2、配置IP

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

DEVICE=eth0
BOOTPROTO=none
HWADDR=00:0C:29:FC:E2:45
ONBOOT=yes
IPADDR=192.168.100.1
NETMASK=255.255.255.0

vim /etc/sysconfig/network-scripts/ifcfg-eth1

DEVICE=eth1
BOOTPROTO=none
HWADDR=12:34:56:78:90：ab
ONBOOT=yes
IPADDR=192.168.200.1
NETMASK=255.255.255.0

service network restart

3、安装、配置DHCP服务

yum install dhcp -y

cp /usr/share/doc/dhcp-3.0.5/dhcpd.conf.sample /etc/dhcpd.conf

vim /etc/dhcpd.conf

＃全局配置
ddns-update-style none;  #动态DNS更新方法
ignore client-updates;     ＃忽略客户机更新

＃子网配置

#谁写IP谁傻X
subnet 192.168.100.0 netmask 255.255.255.0 {
＃分配IP地址池、子网掩码、网关、DNS
        range dynamic-bootp 192.168.100.128 192.168.100.254;
        option subnet-mask              255.255.255.0;
        option routers                  192.168.100.1;
        option domain-name              "benet.com";
        option domain-name-servers      192.168.100.1,192.168.100.2;
#租约时间:最大时间，更新时间
        default-lease-time 21600;
        max-lease-time 43200;

＃主机配置（相当于WINDOWS里的保留）
        host ns {
                #next-server marvin.redhat.com;
                #hardware ethernet 12:34:56:78:AB:CD;
                #fixed-address 207.175.42.254;
        }
subnet 192.168.200.0 netmask 255.255.255.0 {
        range dynamic-bootp 192.168.200.128 192.168.200.254;
        option subnet-mask              255.255.255.0;
        option routers                  192.168.200.1;
        option domain-name              "benet.com";
        option domain-name-servers      192.168.200.1,192.168.200.2;
        default-lease-time 21600;
        max-lease-time 43200;

        host ftp {
                hardware ethernet 00:0C:29:60:E4:AD;
                fixed-address 192.168.200.10;
        }
        host web {
                hardware ethernet 12:34:56:78:90:AB;
                fixed-address 192.168.200.20;
        }
}

service dhcpd start
chkconfig dhcpd on

4、补充：

限制dhcp服务器提供服务的网络接口

vim  /etc/sysconfig/dhcpd

DHCPDARGS="eth0 eth1"

租约文件

tail -f /var/lib/dhcpd/dhcpd.leases

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