dhcpd.conf分析

[root@mac-home etc]# more dhcpd.conf default-lease-time 600;       全局设租期 max-lease-time 7200;//最大租期 option domain-name "example.org";//设置DNS域 option domain-name-servers ns1.example.org, ns2.example.org;//设置DNS服务器地址 # Use this to send dhcp log messages to a different log file (you also  have to hack syslog.conf to complete the redirection). log-facility local7; # No service will be given on this subnet, but declaring it helps the  DHCP server to understand the network topology. 这个空网段虽然不能提供地址分配,却相当于一个地址定义机制,用于告诉DHCP SERVER具体的拓扑接口地址情况 //设置子网与子网掩码 subnet 10.152.187.0 netmask 255.255.255.0 { }    # This is a very basic subnet declaration. 一个基本的DHCP网段 subnet 192.168.1.0 netmask 255.255.255.0 {   range 192.168.1.20 192.168.1.80;//地址池   option router 192.168.1.1; //设置客户端默认网关   option broadcast-address 10.5.5.31;//设置广播地址   default-lease-time 600;   max-lease-time 7200;   option domain-name "internal.example.org";   option domain-name-servers ns1.internal.example.org;

 }

如果想给某IP分配固定的IP地址，修改host 那一项，把网卡的Mac地址和IP进行绑定，就是最后那一段，改为相应的就可以了。

地址绑定 host fantasia {   hardware ethernet 08:00:07:26:c0:a5; 注意此处是client的硬件MAC地址   fixed-address 10.99.7.2;

}

也可以不设fixed-address IP地址,这样绑定到client MAC的就不是IP地址了,而是一些其他的属性 IP地址不绑定,就仍遵循动态分配    host passacaglia {   hardware ethernet 0:0:c0:5d:bd:95;   filename "vmunix.passacaglia";   server-name "toccata.fugue.com"; } Bootp dhcp，很少用 subnet 10.254.239.32 netmask 255.255.255.224 {   range dynamic-bootp 10.254.239.40 10.254.239.60;   option broadcast-address 10.254.239.31;   option routers rtr-239-32-1.example.org; }

   按client某种类型分组DHCP,而不是按物理接口网段 例子: SUN 分配地址段10.17.224.0/24       非SUN的主机,分配地址段10.0.29.0/24 定义一个class foo class "foo" {   match if substring (option vendor-class-identifier, 0, 4) = "SUNW"; 定义vendor-class-identifier } shared-network 224-29 {   subnet 10.17.224.0 netmask 255.255.255.0 {   subnet段,不设range,即只描述接口     option routers rtr-224.example.org;   }   subnet 10.0.29.0 netmask 255.255.255.0 {     option routers rtr-29.example.org;   }   pool { 符合class 的,分配一个range     allow members of "foo";     range 10.17.224.10 10.17.224.250;   }   pool { 不合class 的,分配一个range     deny members of "foo";     range 10.0.29.10 10.0.29.230;   } }