快速配置DHCP服务

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