系统视图下开启DHCP服务

dhcp enable

因这儿有两个地址段，我们创建两个地址池“aa”和“bb”
配置地址池属性：网关、网络号、DNS；
在接口下配置全局DHCP
配置默认路由，下一跳为中继与服务器互连地址

DHCP：

ip pool aa
 gateway-list 10.39.10.1 
 network 10.39.10.0 mask 255.255.255.0 
 dns-list 8.8.8.8 
#
ip pool bb
 gateway-list 10.39.20.1 
 network 10.39.20.0 mask 255.255.255.0 
 dns-list 8.8.8.8 
#
interface GigabitEthernet0/0/0
 ip address 192.168.1.1 255.255.255.0 
 dhcp select global
#
ip route-static 0.0.0.0 0.0.0.0 192.168.1.2  默认路由下一跳为核心交换

核心交换：

创建vlanif，配置IP地址，保证网络畅通，vlanif800负责和DHCP服务器通信；
在vlanif中使能dhcp中继，并指向DHCP服务器地址

interface Vlanif10
 ip address 10.39.10.1 255.255.255.0
 dhcp select relay    #DHCP中继
 dhcp relay server-ip 192.168.1.1   #DHCP服务器地址
#
interface Vlanif20
 ip address 10.39.20.1 255.255.255.0
 dhcp select relay
 dhcp relay server-ip 192.168.1.1
#
interface Vlanif800
 ip address 192.168.1.2 255.255.255.0

查看终端获取的IP地址
vlan10：

vlan20