配置DHCP(centos+OUS)

centos部分

#APP
yum install dhcp -y #安装
cp /usr/share/doc/dhcp-4.2.5/dhcpd.conf.example
/etc/dhcp/dhcpd.conf #复制配置文件
#修改配置文件如下
[root@appsrv ~]# cat /etc/dhcp/dhcpd.conf | egrep -v "^$|#"
subnet 192.168.100.0 netmask 255.255.255.0 {
}
subnet 192.168.0.0 netmask 255.255.255.0 {
range 192.168.0.100 192.168.0.190;
option domain-name-servers 192.168.100.100;
option routers 192.168.0.254;
}
host fantasia {
hardware ethernet 00:0C:29:6D:5E:55; #这里查看Inside的网卡mac地
址是什么，复制到这里
fixed-address 192.168.0.190;
}
#重启并且开机自启动
systemctl enable dhcpd
systemctl restart dhcpd

#ROU

yum install dhcp -y #安装

#使用vim修改成如下

[root@routersrv ~]# vi /usr/lib/systemd/system/dhcrelay.service

[Unit]
Description=DHCP Relay Agent Daemon
Documentation=man:dhcrelay(8)
Wants=network-online.target
After=network-online.target

[Service]
Type=notify
ExecStart=/usr/sbin/dhcrelay -d --no-pid 192.168.100.100(关键点)

[Install]
WantedBy=multi-user.target

#启动
systemctl enable dhcrelay
systemctl restart dhcrelay

UOS部分

#安装服务
apt install isc-dhcp-server

#分发地址的网卡设备名称，修改成下面
root@ispsrv:~#vi /etc/default/isc-dhcp-server
INTERFACESv4="ens36" #这里使用ip ad 看你的网卡名是什么，就填写什么

# 修改配置文件 /etc/dhcp/dhcpd.conf，改成下面这样
root@ispsrv:~# vi /etc/dhcp/dhcpd.conf
subnet 81.6.63.0 netmask 255.255.255.0 {
range 81.6.63.110 81.6.63.190;
option domain-name-servers 81.6.63.100;
option routers 81.6.63.254;
}