DHCP简单配置

简单的DHCP配置

 

一、安装dhcp

rpm -ivh dhcp-3.0.5-7.el5

 

二、vim /etc/dhacd.conf

 

ddns-update-style interim;
ignore client-updates;

subnet 192.168.0.0 netmask 255.255.255.0 {                      （DHCP范围）

# --- default gateway
        option routers                  192.168.0.1;
        option subnet-mask              255.255.255.0;

        option domain-name              "mail.hat.com";
        option domain-name-servers      192.168.0.8;

        option time-offset              -18000; # Eastern Standard Time

        range dynamic-bootp 192.168.0.128 192.168.0.254;        （IP地址分配范围）
        default-lease-time 21600;
        max-lease-time 43200;

        host ns {                                                             （固定DHCP分配）
                hardware ethernet 00:22:15:53:56:07;       （客户机MAC地址）
                fixed-address 192.168.0.50;                        （固定的IP）   
                option domain-name-servers      192.168.0.9;  （DNS地址）

        }

}

 

三、客户机配置

把客户机的DHCP打开就好

 

*********************************************************************

 

多做用域配置

 

一、须要两块网卡，第二块网卡的IP地址是192.168.1段的，还须要打开网卡的转发功能/etc/sysct1.conf 把IPV4那里把0改为1。

 

二、编辑/etc/dhcpd.conf

 

subnet 192.168.0.0 netmask 255.255.255.0 {

        option routers                  192.168.0.1;
        option subnet-mask              255.255.255.0;

        option domain-name              "mail.hat.com";
        option time-offset              -18000; # Eastern Standard Time

        range dynamic-bootp 192.168.0.128 192.168.0.254;
        default-lease-time 21600;
        max-lease-time 43200;

        }

subnet 192.168.1.0 netmask 255.255.255.0 {

        option routers                  192.168.1.1;
        option subnet-mask              255.255.255.0;

        option domain-name              "mail.hat.com";
        option time-offset              -18000; # Eastern Standard Time

        range dynamic-bootp 192.168.0.128 192.168.0.254;
        default-lease-time 21600;
        max-lease-time 43200;

        }

三、配置完客户机就OK了

 

*********************************************************************

 

中继配置

 

 

 

一、编辑/etc/dhcpd.conf文件

 

ddns-update-style interim;
ignore client-updates;
shared-network test {

subnet 192.168.0.0 netmask 255.255.255.0 {

        option routers                  192.168.0.1;
        option subnet-mask              255.255.255.0;

        option domain-name              "mail.hat.com";
        option time-offset              -18000; # Eastern Standard Time

        range dynamic-bootp 192.168.0.128 192.168.0.254;
        default-lease-time 21600;
        max-lease-time 43200;

        }

subnet 192.168.1.0 netmask 255.255.255.0 {

        option routers                  192.168.1.1;
        option subnet-mask              255.255.255.0;

        option domain-name              "mail.hat.com";
        option time-offset              -18000; # Eastern Standard Time

        range dynamic-bootp 192.168.0.128 192.168.0.254;
        default-lease-time 21600;
        max-lease-time 43200;

        }

其它的没动，只是加了一条语句。要把网卡的转发功能关闭。这里还能够添加多个网段，格式同样。

 

二、须要一台服务器作中继服务器，这台服务器须要两张网卡，并且还要打开网卡转发功能。而后配置/etc/sysconfig/dhcrelay

 

INTERFACES="eth0 eth1"           (若是不写就是搜索全部)
DHCPSERVERS="192.168.0.X"  （中继的地址）

 

三、如今客户端之间就能够通讯了。