快速配置DHCP服务:

1.关闭vmdhcp:services.msc --vmdhcp--停止

2.启动vnet1

3.设置静态永久的网络参数:

1)设置静态ip等参数

[root@dhcp ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0 

DEVICE="eth0"
HWADDR="00:0C:29:68:b1:0f"
NM_CONTROLLED="no"
ONBOOT="yes"
BOOTPROTO=static
IPADDR=192.168.100.100
NETMASK=255.255.255.0
GATEWAY=192.168.100.1
DNS1=192.168.100.100

2)主机名

[root@dhcp ~]# cat /etc/sysconfig/network

NETWORKING=yes

HOSTNAME=dhcp.linuxyy.cn

3)关闭防火墙和selinux

/etc/init.d/iptables stop

vi /etc/selinux/config

SELINUX=disabled

:wq


4)设置开机启动项

chkconfig iptables off

chkconfig NetworkManager off

chkconfig network on

reboot

重启的验证:

ip a

cat  /etc/resolv.conf

iptables -L

getenforce

4.安装能提供dhcp服务的软件

vi  /etc/yum.repos.d/rhel.repo

[local]
name=local
baseurl=file:///mnt/
enabled=1
gpgcheck=0

:wq

mount  /dev/cdrom /mnt

yum -y install dhcp


5.修改服务的配置文件:定制功能

vi /etc/dhcp/dhcpd.conf  

##:r /usr/share/doc/dhcp-*/dhcpd.conf.sample;  ##复制dhcp文档示例
:%g /^#/d;%g /^$/d;修改配置文件如下
option domain-name "linuxyy.cn";
option domain-name-servers 202.106.0.20;
default-lease-time 600;
max-lease-time 7200;
log-facility local7;
subnet 192.168.1.0 netmask 255.255.255.0 {
  range 192.168.1.150 192.168.1.250;
  option routers 192.168.1.1;
}

:wq

/etc/init.d/dhcpd  start

chkconfig dhcpd on

netstat -uptln |grep dhcp  ##查看67号端口

6.客户机测试:

1)临时设置:

dhclient  -d  eth0   ##获取ip

dhclient -r  eth0  ##释放ip

2)永久使用dhcp:

vi /etc/sysconfig/network-scripts/ifcfg-eth0

BOOTPROTO=dhcp

:wq


vi  /etc/sysconfig/dhcpd  ##解决启动时报网卡类问题

DHCPDARGS=eth0

:wq

tail -30  /var/log/messages  ##看常规错误