RHEL5下 构建DHCP及中继服务器

youlp

需求描述：
在网关主机中构建DHCP、DHCP中继服务器
1．为以下三个物理网段提供动态地址分配服务：
192.168.1.0/24
192.168.2.0/24
192.168.3.0/24
2．默认租约时间21600秒
3．最大租约时间43200秒
4．客户机使用的DNS服务器地址如下：
202.106.0.20
8.8.8.8
5．用于动态分配的IP地址范围分别为：
192.168.1.100～192.168.1.200
192.168.2.200～192.168.2.200
192.168.3.300～192.168.3.200

网关主机各接口的IP地址作为对应网段的默认网关

实现思路：
1．确认服务器主机的网络地址配置正确
2．先配置好DHCP服务器
3．再配置DHCP中继服务器

验证实验结果
注意事项：
将虚拟机的内存设为256MB，进入字符模式，关闭不常用的系统服务程序
将DHCP服务器的默认网关指向DHCP中继服务器

GO
DHCP服务器的配置（网卡为vmnet2）
[iyunv@dhcpserver~]#serviceiptablesstop
[iyunv@dhcpserver~]#setenforce0
[iyunv@dhcpserver~]#cat/etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=static
ONBOOT=yes
HWADDR=00:0c:29:b3:f2:f5
IPADDR=192.168.1.2
NETMASK=255.255.255.0
GATEWAY=192.168.1.1
[iyunv@dhcpserver~]#servicenetworkrestart
[iyunv@dhcpserver~]#ifconfigeth0
[iyunv@dhcpserver~]#yum-yinstalldhcp
[iyunv@dhcpserver~]#cp/usr/share/doc/dhcp-3.0.5/dhcpd.conf.sample/etc/dhcpd.conf
[iyunv@dhcpserver~]#vim/etc/dhcpd.conf
ddns-update-styleinterim;
ignoreclient-updates;
default-lease-time21600;
max-lease-time43200;
optiondomain-name-servers202.106.0.20,8.8.8.8;
optiondomain-name"Crushlinux.com";

subnet192.168.1.0netmask255.255.255.0{
optionrouters192.168.1.1;
optionsubnet-mask255.255.255.0;
rangedynamic-bootp192.168.1.100192.168.1.200;
}

subnet192.168.2.0netmask255.255.255.0{
optionrouters192.168.2.1;
optionsubnet-mask255.255.255.0;
rangedynamic-bootp192.168.2.100192.168.2.200;
}

subnet192.168.3.0netmask255.255.255.0{
optionrouters192.168.3.1;
optionsubnet-mask255.255.255.0;
rangedynamic-bootp192.168.3.100192.168.3.200;
}

[iyunv@dhcpserver~]#servicedhcpdrestart
[iyunv@dhcpserver~]#chkconfigdhcpdon
[iyunv@dhcpserver~]#ping192.168.1.1

DHCP中继服务器的配置（共3个网卡，第一个：vmnet2，第二个：vmnet3，第四个：vmnet4）
[iyunv@DHCRELAY~]#serviceiptablesstop
[iyunv@DHCRELAY~]#setenforce0
[iyunv@DHCRELAY~]#vim/etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=static
HWADDR=00:0c:29:e0:f7:26
ONBOOT=yes
IPADDR=192.168.1.1
NETMASK=255.255.255.0
GATEWAY=192.168.1.2

[iyunv@DHCRELAY~]#vim/etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
BOOTPROTO=static
HWADDR=00:0c:28:e0:f7:33
ONBOOT=yes
IPADDR=192.168.2.1
NETMASK=255.255.255.0

[iyunv@DHCRELAY~]#vim/etc/sysconfig/network-scripts/ifcfg-eth2
DEVICE=eth2
BOOTPROTO=static
HWADDR=00:0b:17:e0:f7:33
ONBOOT=yes
IPADDR=192.168.3.1
NETMASK=255.255.255.0
[iyunv@DHCRELAY~]#servicenetworkrestart
[iyunv@DHCRELAY~]#ifconfig
[iyunv@DHCRELAY~]#ping192.168.1.2
[iyunv@DHCRELAY~]#yum-yinstalldhcp
[iyunv@DHCRELAY~]#vim/etc/sysconfig/dhcrelay
INTERFACES="eth0eth1eth2"
DHCPSERVERS="192.168.1.2"
[iyunv@DHCRELAY~]#servicedhcrelaystart
[iyunv@DHCRELAY~]#servicedhcrelayrestart
[iyunv@DHCRELAY~]#chkconfigdhcrelayon
[iyunv@DHCRELAY~]#netstat–tulnp|grepdhcrelay

客户机测试
客户机网卡分别设置成vmnet2、vmnet3、vmnet4获取IP地址进行测试
测试命令：
开始-->运行-->cmd
C:UsersCrushlinux>cd
C:>ipconfig/release
C:>ipconfig/renew

q66262

即使哭了我也要笑、即使笑了我也要继续。