Linux DHCP 服务器安装与配置

Linux DHCP 服务器安装与配置
以下为我在家里的服务器上的安装DHCP的过程：


[root@HOME root]#
查询系统是否安装了DHCP服务
[root@HOME root]# rpm -qa |grep dhcp
插入RedHat Linux 9.0 安装盘第二张
[root@HOME dev]# cd /mnt/cdrom
[root@HOME cdrom]# ls
EULA GPL README RedHat RPM-GPG-KEY TRANS.TBL
[root@HOME cdrom]# cd redhat
-bash: cd: redhat: No such file or directory
[root@HOME cdrom]# cd RedHat
[root@HOME RedHat]# ls
RPMS TRANS.TBL
[root@HOME RedHat]# cd RPMS
列出DHCP 安装包
[root@HOME RPMS]# ls *dhcp*
dhcp-3.0pl1-23.i386.rpm dhcp-devel-3.0pl1-23.i386.rpm
安装DHCP软件包
[root@HOME RPMS]# rpm -ivh dhcp-3.0pl1-23.i386.rpm
warning: dhcp-3.0pl1-23.i386.rpm: V3 DSA signature: NOKEY, key ID db42a60e
Preparing...        ########################################### [100%]
  1:dhcp          ########################################### [100%]

弹出光盘
[root@HOME RPMS]# cd; eject
[root@HOME root]#

安装完成后，系统提供一个DHCP服务器的配置例子：
[root@HOME root]# cat /usr/share/doc/dhcp-3.0pl1/dhcpd.conf.sample
ddns-update-style interim;
ignore client-updates;

subnet 192.168.0.0 netmask 255.255.255.0 {

# --- default gateway
    option routers         192.168.0.1;
    option subnet-mask       255.255.255.0;

    option nis-domain        "domain.org";
    option domain-name       "domain.org";
    option domain-name-servers   192.168.1.1;

    option time-offset       -18000; # Eastern Standard Time
#    option ntp-servers       192.168.1.1;
#    option netbios-name-servers   192.168.1.1;
# --- Selects point-to-point node (default is hybrid). Don't change this unless
# -- you understand Netbios very well
#    option netbios-node-type 2;

    range dynamic-bootp 192.168.0.128 192.168.0.255;
    default-lease-time 21600;
    max-lease-time 43200;

    # we want the nameserver to appear at a fixed address
    host ns {
        next-server marvin.redhat.com;
        hardware ethernet 12:34:56:78:AB:CD;
        fixed-address 207.175.42.254;
    }
}
[root@HOME root]#

我的一个配置案例：

单VLAN 案例：

[root@HOME etc]# cat dhcpd.conf
# START of DHCP Server Configuration File
ddns-update-style interim;
ignore client-updates;
default-lease-time 21600;
max-lease-time 43200;

option domain-name-servers 202.106.0.20;
option domain-name "NeTSP.com";

subnet 192.168.0.0 netmask 255.255.255.0{

pool{
  range 192.168.0.2 192.168.0.254;
  option subnet-mask 255.255.255.0;
  option routers 192.168.0.1;
}

}
#end of the DHCP server configuration.
[root@HOME etc]#

多VLAN 配置案例：
[root@HOME etc]# cat dhcpd.conf
# START of DHCP Server Configuration File
ddns-update-style interim;
ignore client-updates;
default-lease-time 21600;
max-lease-time 43200;

option domain-name-servers 202.106.0.20;
option domain-name "NeTSP.com";

# VLAN 10
subnet 192.168.10.0 netmask 255.255.255.0{

pool{
  range 192.168.100.2 192.168.100.254;
  option subnet-mask 255.255.255.0;
  option routers 192.168.10.1;
}

}

#VLAN 20
subnet 192.168.20.0 netmask 255.255.255.0{

pool{
  range 192.168.20.2 192.168.20.254;
  option subnet-mask 255.255.255.0;
  option routers 192.168.20.1;
}

}


#VLAN 30
subnet 192.168.30.0 netmask 255.255.255.0{

pool{
  range 192.168.30.2 192.168.30.254;
  option subnet-mask 255.255.255.0;
  option routers 192.168.30.1;
}

}