RouteSrv+AppSrv DHCP中继+DHCP配置

题目:

DHCP：

为InsideCli客户端网络分配地址，地址池范围：192.168.0.110-192.168.0.190/24； 域名解析服务器：按照实际需求配置DNS服务器地址选项； 网关：按照实际需求配置网关地址选项； 为InsideCli分配固定地址为192.168.0.190/24；

DHCP RELAY

配置DHCP 允许客户端通过中继服务获取网络地址

一、关闭Selinux和防火墙

[root@appsrv ~]# setenforce 0
[root@appsrv ~]# systemctl stop firewalld

二、安装dhcp

[root@appsrv ~]# yum install dhcp -y

三、编辑和配置dhcp

[root@appsrv ~]# vim /etc/dhcp/dhcpd.conf

default-lease-time 43200;           //默认租约时间
max-lease-time 259200;              //最大租约时间
subnet 192.168.0.0 netmask 255.255.255.0 {
range 192.168.0.110 192.168.0.190;
option domain-name-servers 192.168.100.100;
option domain-name "chinaskills.cn";
option routers 192.168.0.254;
}
subnet 192.168.100.0 netmask 255.255.255.0 {
}
host insidecli{
hardware ethernet 08:00:07:26:c0:a5;
fixed-address 192.168.0.190;
}

四、启动dhcp服务

[root@appsrv ~]# systemctl start dhcpd

五、开启路由转发

[root@routersrv ~]# vim/etc/sysctl.conf
net.ipv4.ip_forward=1

六、中继

[root@routersrv ~]# yum install dhcp -y
[root@routersrv ~]# dhcrelay 192.168.100.100

七、客户端测试

[root@insidecli ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33
BOOTPROTO=dhcp
ONBOOT=yes
​
重启网卡
[root@insidecli ~]# systemctl restart network