搭建DHCP 服務器

搭建DHCP服務器

服務端：192.168.42.175  客戶端：192.168.42.176

（保證虛擬機兩張網卡都相同，這裏採用的是NAT模式）

1.      安裝DHCP 服務端

[root@xuegod175 ~]# rpm -ivh/media/CentOS_6.5_Final/Packages/dhcp-common-4.1.1-38.P1.el6.centos.x86_64.rpm

Preparing...               ########################################### [100%]

       packagedhcp-common-12:4.1.1-38.P1.el6.centos.x86_64 is already installed

[root@xuegod175 ~]# rpm -ivh/media/CentOS_6.5_Final/Packages/dhcp-

dhcp-4.1.1-38.P1.el6.centos.x86_64.rpm        dhcp-common-4.1.1-38.P1.el6.centos.x86_64.rpm

[root@xuegod175 ~]# rpm -ivh/media/CentOS_6.5_Final/Packages/dhcp-4.1.1-38.P1.el6.centos.x86_64.rpm

Preparing...               ########################################### [100%]

  1:dhcp                  ########################################### [100%]

[root@xuegod175 ~]# rpm -ivh/media/CentOS_6.5_Final/Packages/dhclient-4.1.1-38.P1.el6.centos.x86_64.rpm

Preparing...               ########################################### [100%]

       packagedhclient-12:4.1.1-38.P1.el6.centos.x86_64 is already installed

2.    拷貝配置文件

[root@xuegod175 ~]# cp/usr/share/doc/dhcp-4.1.1/dhcpd.conf.sample /etc/dhcp/dhcpd.conf

cp: overwrite `/etc/dhcp/dhcpd.conf'?yes

3.      修改主要配置文件

[root@xuegod175 ~]# cat/etc/dhcp/dhcpd.conf

subnet 192.168.42.0 netmask255.255.255.0{     （192.168.42.0） 網段  （255.255.255.0）子網掩碼

range 192.168.42.100 192.168.42.200;   #表示的是地址池

option domain-name-servers 192.168.42.2;   #DNS地址

option domain-name"xuegod.cn";

option routers 192.168.42.2; #網關（注意：這裏的網關在虛擬機中要查看NAT 裏面設置的網關要一致）

option broadcast-address 192.168.42.255;#廣播地址

default-lease-time 600; 最短租期

max-lease-time 7200; 最長租期

}

4.      客戶端進行測試

客戶端機器須要把IP 地址獲取方式改爲自動獲取方式 重啓網卡進行測試

[root@xuegod176~]# /etc/init.d/network restart

Shutting downinterface eth0:  Device state: 3(disconnected)

[  OK  ]

Shutting downloopback interface:                         [  OK  ]

Bringing uploopback interface:                           

[  OK  ]

Bringing upinterface eth0:  Active connection state:activated

Activeconnection path: /org/freedesktop/NetworkManager/ActiveConnection/4 [  OK  ]

經測試：客戶端可以正常獲取到ip地址

查看網關

[root@xuegod176 ~]# route -n

Kernel IP routing table

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface

192.168.42.0    0.0.0.0         255.255.255.0   U    1      0        0 eth1

0.0.0.0         192.168.42.2    0.0.0.0         UG   0      0        0 eth1 #網關正確

查看DNS

[root@xuegod176 ~]# cat /etc/resolv.conf

# Generated by NetworkManager

domain xuegod.cn

search xuegod.cn cn

nameserver 192.168.42.2        #DNS 正確