实验题·DHCP中继
实验环境
需求分析
Cloud1 使用虚拟机CentOS 7.6 来做DHCP中继
实验步骤
设置二层交换机sw2
vlan batch 10 20 100 #创建vlan
interface Ethernet0/0/1 #进接口
port link-type access #配access口
port default vlan 10
interface Ethernet0/0/2
port link-type access
port default vlan 20
interface Ethernet0/0/3
port link-type access
port default vlan 100
interface GigabitEthernet0/0/1
port link-type trunk
port trunk allow-pass vlan all
设置三层交换机sw1
vlan batch 10 20 100 #创建vlan
dhcp enable #开启dhcp服务
interface Vlanif10 #进接口
ip address 192.168.10.1 255.255.255.0 #配置IP地址
dhcp select relay #dhcp中继
dhcp relay server-ip 192.168.100.100 #去IP地址去获取
interface Vlanif20
ip address 192.168.20.1 255.255.255.0
dhcp select relay
dhcp relay server-ip 192.168.100.100
interface Vlanif100
ip address 192.168.100.1 255.255.255.0
dhcp select relay
dhcp relay server-ip 192.168.100.100
设置CentOS 7.6 DHCP中继服务
[root@localhost ~]# setenforce 0 #关闭核心防护
[root@localhost ~]# systemctl stop firewalld #关闭防火墙
[root@localhost ~]# yum -y install dhcp* #安装dhcp
[root@localhost ~]# cp /usr/share/doc/dhcp-4.2.5/dhcpd.conf.example /etc/dhcp/dhcpd.conf
[root@localhost ~]# vi /etc/dhcp/dhcpd.conf
......
option domain-name "zhaobin";
option domain-name-servers 8.8.8.8;
......
subnet 192.168.10.0 netmask 255.255.255.0 {
range 192.168.10.111 192.168.10.222;
option routers 192.168.10.1;
}
subnet 192.168.20.0 netmask 255.255.255.0 {
range 192.168.20.111 192.168.20.222;
option routers 192.168.20.1;
}
subnet 192.168.100.0 netmask 255.255.255.0 {
range 192.168.100.111 192.168.100.222;
option routers 192.168.100.1;
}
......
[root@localhost ~]# systemctl start dhcpd