华为三层交换机配置DHCP
SW：
<Huawei>sys
[Huawei]sys SW
//禁用信息中心功能，减少配置后的输出信息，方便下一步配置
[SW]undo info-center enable
[SW]vlan batch 10 20
[SW]int vlan 10
[SW-Vlanif10]ip add 192.168.1.254 24
[SW-Vlanif10]int vlan 20
[SW-Vlanif20]ip add 172.16.1.254 24
[SW-Vlanif20]int g0/0/1
[SW-GigabitEthernet0/0/1]port link-type access
[SW-GigabitEthernet0/0/1]port default vlan 10
[SW-GigabitEthernet0/0/1]int g0/0/2
[SW-GigabitEthernet0/0/2]port link-type access
[SW-GigabitEthernet0/0/2]port default vlan 20左边基于接口DHCP
[SW-GigabitEthernet0/0/2]quit
[SW]dhcp enable
[SW]int vlan 10
//基于接口DHCP，分配该接口下网段的IP
[SW-Vlanif10]dhcp select interface
//分配的dns
[SW-Vlanif10]dhcp server dns-list 8.8.8.8
//分配除192.168.1.101-253的IP地址
[SW-Vlanif10]dhcp server excluded-ip-address 192.168.1.101 192.168.1.253
//租期7天
[SW-Vlanif10]dhcp server lease day 7
[SW-Vlanif10]dis this
#
interface Vlanif10
ip address 192.168.1.254 255.255.255.0
dhcp select interface
dhcp server excluded-ip-address 192.168.1.101 192.168.1.253
dhcp server lease day 7 hour 0 minute 0
dhcp server dns-list 8.8.8.8
dhcp server next-server 192.168.1.254
#
returnPC1 DHCP测试
华为从地址池最大IP地址开始分配，思科从地址池最小IP地址开始分配
因为基于接口DHCP，所以网关自动获取该接口下的IP地址
抓包查看：
右边基于全局配置：
[SW-Vlanif10]int vlan 20
//基于全局DHCP
[SW-Vlanif20]dhcp select global
[SW-Vlanif20]quit
//创建一个名为20的地址池
[SW]ip pool 20
//宣告网段
[SW-ip-pool-20]network 172.16.1.0 mask 24
//分配网关
[SW-ip-pool-20]gateway-list 172.16.1.254
//分配dns
[SW-ip-pool-20]dns-list 114.114.114.114
//去除172.16.1.151-253的IP地址
[SW-ip-pool-20]excluded-ip-address 172.16.1.151 172.16.1.253
//租期7天
[SW-ip-pool-20]lease day 7
[SW-ip-pool-20]dis this
#
ip pool 20
gateway-list 172.16.1.254
network 172.16.1.0 mask 255.255.255.0
excluded-ip-address 172.16.1.151 172.16.1.253
lease day 7 hour 0 minute 0
dns-list 114.114.114.114
#
returnPC2 DHCP测试
PC1 ping PC2测试
