ddns-update-style interim;                           
ignore client-updates;                               
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subnet 192.168.107.0 netmask 255.255.255.0 {                   #     服务子网（子域网段）
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# --- default gateway                               
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        option routers                  192.168.107.1;              #  路由器地址（网关），设置路由器IP所在，routers要加s才可以。
        option subnet-mask              255.255.255.0;         #广播地址
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        option nis-domain               "domain.org";                #DNS域名   
        option domain-name              "domain.org";              
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        option domain-name-servers      192.168.1.1;                #DNS的IP地址
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        option time-offset              -18000; # Eastern Standard Time      

         #时间偏差（和世界标准时间格林威治时间的偏移量）
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#       option ntp-servers              192.168.1.1;               
#       option netbios-name-servers     192.168.1.1;              
# --- Selects point-to-point node (default is hybrid). Don't change this unless   
# -- you understand Netbios very well                       
#       option netbios-node-type 2;                      

＃号表示后面部分为说明项目,每条语句最后出了由“｛｝”符号结束之外，必须用“；”号结尾，中间包含多项，则需要用“，”号隔开

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        range dynamic-bootp 192.168.0.128 192.168.0.254;           #  DHCP的IP地址池(判断一个IP地址是否属于该子网)
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        default-lease-time 21600;                        #默认的租约期限（2天）,默认单位为秒
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        max-lease-time 43200;                            #最大的租约期限（4天），超过租约时间尚未更新IP时，最长可用该IP的时间
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        # we want the nameserver to appear at a fixed address               
        host ns {                               #指定主机的名称
                next-server marvin.redhat.com;                    #通过MAC地址绑定，以便
                hardware ethernet 12:34:56:78:AB:CD;          #给某个用户分配一个固定的IP
                fixed-address 207.175.42.254;                   
        }                                   
}                                       
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