不同vlan通过DHCP中继方式获取IP的配置方法
1. 规划拓扑及VLAN，IP
2. Windows server 2016 DHCP服务器配链接描述
https://blog.51cto.com/lumay0526/2046957
注意：如果在域环境下部署DHCP，在安装完成后需要使用活动目录服务器授权DHCP服务
3. 接入交换机配置（2个配置相同）
system-view
vlan batch 10 20 #新建VLAN
interface GigabitEthernet0/0/1 #进入接口GigabitEthernet0/0/1
port link-type access #设置端口模式Access，vlan10
port default vlan 10
interface GigabitEthernet0/0/2 #进入接口GigabitEthernet0/0/2
port link-type access #设置端口模式Access，vlan20
port default vlan 20
interface GigabitEthernet0/0/3 #进入接口GigabitEthernet0/0/3（上行端口）
port link-type trunk #设置端口模式Trunk，所有vlan均可通过
port trunk allow-pass vlan all
4. 核心交换机配置
system-view
vlan batch 10 20 30 40 #新建vlan10 20 30 40
#配置虚拟端口地址（网关地址）
interface vlan 10
ip address 192.168.10.1 24
interface vlan 20
ip address 192.168.20.1 24
interface vlan 30
ip address 192.168.90.1 24
interface GigabitEthernet0/0/1 #配置下行端口trunk
port link-type trunk
port trunk allow-pass vlan all
interface GigabitEthernet0/0/2 #配置下行端口trunk
port link-type trunk
port trunk allow-pass vlan all
interface GigabitEthernet0/0/3 #配置连接dhcp端口vlan30
port link-type access
port default vlan 30
#配置中继：
system-view
dhcp enable
interface vlan 10
dhcp select relay
dhcp relay server-ip 192.168.90.9
interface vlan 20
dhcp select relay
dhcp relay server-ip 192.168.90.9