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$Y'?L8v;JU5AQ
6jfl5I4N'x8KV0首先得在dhcp.conf文件中添加超级作用域：itlab博客hpO.Wx"c
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ddns-update-style. interim; ;指定DHCP支持的DNS动态更新为interimitlab博客m:ZQ0Vb
ignore client-updates; ;指定不允许客户机更新DNS记录。itlab博客N f2b%sB
shared-network xxxdhcp { ；超级作用域名为xxxdhcp
3i9i2PUm0 option subnet-mask 255.255.255.0;itlab博客-euX](S%Zz,K'}:Z
option domain-name-servers 192.168.1.2,192.168.1.10,192.168.4.1;itlab博客2X7u P
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option broadcast-address 192.168.1.255;itlab博客8f@ l)[2| y%{s
default-lease-time 86400;
X#U"K8\ea+?:y D h9WGZ0 max-lease-time 172800;
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subnet 192.168.1.0 netmask 255.255.255.0 {
#_4B2?8m$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 {
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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;
_7r+gE%t0 fixed-address 192.168.2.20;itlab博客 ZX;C jH#d^EQL
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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。