Linux下配置DHCP中继代理

假设一台计算机做软路由，有三个网卡，连接3个不同的网段，192.168.1.1/24, 192.168.2.1/24,192.168.3.1/24;其中192.168.1.1/24这个网段有一个DHCP服务器，那怎么样设置可以使192.168.2.1/24和192.168.3.1/24这两个网段分配IP呢？ itlab博客$Y'?L8v;JU5AQ

6jfl5I4N'x8KV0首先得在dhcp.conf文件中添加超级作用域： itlab博客hpO.Wx"c

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ddns-update-style. interim;       ;指定DHCP支持的DNS动态更新为interim itlab博客m:ZQ0Vb
   ignore client-updates;              ;指定不允许客户机更新DNS记录。 itlab博客N f2b%sB
   shared-network xxxdhcp  {     ；超级作用域名为xxxdhcp
3i9i2PUm0   option subnet-mask 255.255.255.0; itlab博客-euX](S%Zz,K'}:Z
   option domain-name-servers  192.168.1.2,192.168.1.10,192.168.4.1; itlab博客2X7u P
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  option broadcast-address 192.168.1.255; itlab博客8f@ l)[2| y%{s
  default-lease-time 86400;
X#U"K8\ea+?:y D h9WGZ0  max-lease-time 172800;
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   subnet 192.168.1.0  netmask 255.255.255.0 {
#_4B2?8m$I2T)oW0    range 192.168.1.21 192.168.1.49; itlab博客%E4iv/jW
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    option routers 192.168.1.1; itlab博客B`LQ yU}.S&m m
     host pc1 {
M$Y&E3}X6b~_0       hardware ethernet MAC; itlab博客B_,I o)q"m
       fixed-address 192.168.1.20;
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w rCuI^@0subnet 192.168.2.0  netmask 255.255.255.0 { itlab博客-? b0@0Q9K [#S.g W
    range 192.168.2.21 192.168.2.49;
'{pW+X&n ~/k$V0    option routers 192.168.2.1;
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FW6}0     host pc1 { itlab博客} FL7g8z0v
       hardware ethernet MAC;
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} itlab博客
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}

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subnet 192.168.3.0  netmask 255.255.255.0 { itlab博客YZ~.P-C
    range 192.168.3.21 192.168.3.49; itlab博客dK4H*[z%]
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    option routers 192.168.3.1;
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       hardware ethernet MAC; itlab博客\:c {p%sQ)l4[Q.u ]
       fixed-address 192.168.3.20;
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linux下的DHCP客户端：/etc/sysconfig/network-scripts/ifcfg-eth0把BOOTPROTO="none"修改为BOOTPROTO="dhcp" itlab博客
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n+A8Y:X3J)Fdz'}0如果需要在系统启动时自动引导启动联网，/etc/sysconfig/networking下的networking=yes。