拓扑如下
PC2配置：
勾选DHCP，关闭自动获取DNS服务器地址（防止自动发送的discover报文导致抓包无法抓到现象）
AR2配置：
<Huawei>system-view
Enter system view, return user view with Ctrl+Z.
[Huawei]dhcp enable
Info: The operation may take a few seconds. Please wait for a moment.done.
[Huawei]int g0/0/0
[Huawei-GigabitEthernet0/0/0]ip add 192.168.1.1 24 #设置ip地址，根据这个地址选择dhcp分配的地址池
[Huawei-GigabitEthernet0/0/0]quit
[Huawei]ip pool p1
Info: It's successful to create an IP address pool.
[Huawei-ip-pool-p1]network 192.168.1.0 mask 24 #分配的网段
[Huawei-ip-pool-p1]gateway-list 192.168.1.1 #配置网关
[Huawei-ip-pool-p1]dns-list 114.114.114.114 8.8.8.8 192.168.1.1 #设置dns，最多可以设置8个，默认会使用前面两个
[Huawei-ip-pool-p1]quit
[Huawei]int g0/0/0
[Huawei-GigabitEthernet0/0/0]dhcp select global #启用全局地址池里的设置验证结果
pc执行ipconfig /renew（会发送discover报文，去寻找dhcp，如果路由器没有dhcp enable，那么将无法处理dhcp报文）
常见问题
1.pc无法获取到ip地址，提示“can't find dhcp”字样
排查步骤
1.检查dhcp是否enable，display current-configuration | include dhcp enable
2.查看地址池有无配置，display ip pool
3.路由器有没有配置接口ip地址
检查配置
[Huawei]dis current-configuration 
