在RHEL4系统中配置DHCP服务器及DHCP中继代理

一路狂笑

在RHEL4系统中配置DHCP服务器及DHCP中继代理

2007-07-09 kenthy#qingdaonews.com

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系统环境：RHEL4 [ 2.6.9-5.EL ]
软件版本：
dhcp-3.0.1-12_EL
dhclient-3.0.1-12_EL

目标功能：
    使用一台RHEL4服务器[Server1]连接A、B、C三个网段，A网段中有一台DHCP服务器[Server2]。需要在Server1上配置dhcp中继代理，以使Server2能够给三个网段的客户机自动分配IP地址，给A网段的网络打印机绑定永久IP地址。
    实验参数如下：
Server1：
     eth0: 172.17.17.1/24
     eth1: 192.168.1.1/24
     eth2: 192.168.2.1/24
Server2：
     eth0: 172.17.17.2/24
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Server1 [DHCP中继]:

    1、# vi /etc/sysctl.conf
net.ipv4.conf.all.bootp_relay = 1
net.ipv4.ip_forward = 1
       # echo 1 > /proc/sys/net/ipv4/conf/all/bootp_relay
       # echo 1 > /proc/sys/net/ipv4/ip_forward

    2、# vi /etc/sysconfig/dhcrelay
INTERFACES="eth0 eth1 eth2"
DHCPSERVERS="172.17.17.2"

    3、# chkconfig --level 2345 dhcrelay on
       # /etc/init.d/dhcrelay start
    [注：如果仅当次测试可以使用“/usr/sbin/dhcrelay -i eth0 -i eth1 -i eth2 172.17.17.2”命令启动dhcp中继服务]

Server2 [DHCP服务器]：

    1、# vi /etc/dhcpd.conf
ddns-update-style none;
ignore client-updates;
subnet 172.17.17.0 netmask 255.255.255.0 {
  option routers   172.17.17.1;
  option subnet-mask  255.255.255.0;
  option domain-name-servers 172.17.17.1,202.106.0.20;
  option time-offset  -18000;
  range 172.17.17.100 172.17.17.200;
  default-lease-time 36000;
  max-lease-time 86400;
  host printer {
   hardware ethernet 00:12:fc:78:AB:CD;
   fixed-address 172.17.17.250;
  }
}
subnet 192.168.1.0 netmask 255.255.255.0 {
  option routers   192.168.1.1;
  option subnet-mask  255.255.255.0;
  option domain-name-servers 192.168.1.1,202.106.0.20;
  option time-offset  -18000;
  range 192.168.1.100 192.168.1.200;
  default-lease-time 36000;
  max-lease-time 86400;
}
subnet 192.168.2.0 netmask 255.255.255.0 {
  option routers   192.168.2.1;
  option subnet-mask  255.255.255.0;
  option domain-name-servers 192.168.2.1,202.106.0.20;
  option time-offset  -18000;
  range 192.168.2.100 192.168.2.200;
  default-lease-time 36000;
  max-lease-time 86400;
}

    2、# vi /etc/sysconfig/dhcpd
DHCPDARGS="eth0"

    3、# chkconfig --level 2345 dhcpd on
       # /etc/init.d/dhcpd start

本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u1/40349/showart_337110.html