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<p><FONT class=normalfont><B><font color=blue>linux下DHCP服务实战</font></B></FONT><BR><FONT class=smallfont color=#ff9900>2004-04-23 15:18 pm</FONT><BR><FONT class=normalfont>作者：作者<br>来自：Linux知识宝库<br>联系方式：无名<br><br>我们知道dhcp 就是动态ip 地址分配服务拉！在一个网络中，如果电脑不是很 多的情况下，我们一般都是手动给每个电脑分配ip地址等一些网络的设定。如果一个网络中有上百台电脑，我们也要一台台跑去设定他们的ip 地址 ，那样我想人都会设置的头昏 还得上串下跳的到处跑。本人的公司是小公司 只有10几台电脑，我很懒所以用linux配置了dhcp动态分配ip地址的服务！<br>
一般来说我们在安装linux时如果选了everything，那么你的dhcp也就有了。真好啊~！但是你想要它 能够正常工作起来 ，那还得你自己动动手。<br>
DHCPd后台程序总是读取配置文件/etc/dhcpd.conf, 下面给出一我主机上的DHCP配置文件的例子： <br>
ddns-update-style interim;<br>
ignore client-updates;<br>
<br>
subnet 192.168.25.0 netmask 255.255.255.0 {<br>
<br>
# --- default gateway<br>
option routers 192.168.25.15;<br>
option subnet-mask 255.255.255.0;<br>
<br>
# option nis-domain "uc88.domain";<br>
option domain-name "uc88.domain";<br>
option domain-name-servers 202.96.128.68,192.168.25.15;<br>
<br>
option time-offset -18000; # Eastern Standard Time<br>
# option ntp-servers 192.168.1.1;<br>
# option netbios-name-servers 192.168.1.1;<br>
# --- Selects point-to-point node (default is hybrid). Don't change this unless<br>
# -- you understand Netbios very well<br>
# option netbios-node-type 2;<br>
<br>
range dynamic-bootp 192.168.25.100 192.168.25.254;<br>
default-lease-time 259200;<br>
max-lease-time 518400;<br>
<br>
# we want the nameserver to appear at a fixed address<br>
# host ns {<br>
# next-server marvin.redhat.com;<br>
# hardware ethernet 12:34:56:78:AB:CD;<br>
# fixed-address 207.175.42.254;<br>
# }<br>
}<br>
<br>
上面的意思是：<br>
用255.255.255.0作为子网掩码，用192.168.25.255作为广播地址，用192.168.25.15作为 <br>
默认网关，用202.96.128.68 and 192.168.25.15作为DNS服务器 将分配地址的范围是：192.168.25.100-192.168.25.254<br>
<br>
保存退出<br>
<br>
四. 大多数情况下，DHCP的安装不创建一个dhcpd.leases 文件，在你启动DHCP服务器之前，你必须创建空文件 dhcpd.leases <br>
<br>
#touch /var/state/dhcp/dhcpd.leases <br>
为启动DHCP服务器，简单地打入 /usr/sbin/dhcpd 或者用#ntsysv把DHCP服务自动启动 <br>
<br>
这将启动dhcpd在eth0设备上，如果你想在eth1设备上启动dhcpd，则 <br>
#/usr/sbin/dhcpd eth1 <br>
<br>
<br>
************<br>
我的教训~！我作好后 dhcp也正常启动服务了~！但是在其他98客户机上 启动自动获得ip地址 都不行 ~！忙了一天终于 发现原因，原来网络上有一台win2000也在同时运行dhcp服务，真该死~！把win2000的 dhcp停掉就好了~！ <br>
<br>
<br>
如何观察客户的ip到底有没有获得呢？<br>
在98运行winipcfg<br>
在2000 下运行ipconfig /all<br>
就一清二楚拉！<br>
<br>
<br>
__________________<br>
<br>
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