华为DHCP

实验环境，如下图。vlan10 ,vlan20 ,vlan30

实验1:为vlan10配置基于接口的DHCP功能，分配的网段默认和网关一样

[LSW4]dhcp enable 首先在全局模式下开启dhcp功能

[LSW4-Vlanif10]dhcp select interface 开启此接口的dhcp服务

[LSW4-Vlanif10]dhcp server dns-list 114.114.114.114 8.8.8.8 配置dns服务

实验2：用全局地址池的方法为vlan20配置DHCP功能

[LSW4]dhcp enable 首先在全局模式下开启dhcp功能

[LSW4]ip pool dhcpv20 创建地址池 取名为dhcpv20

配置地址池:

[LSW4-ip-pool-dhcpv20]network 192.168.20.0 mask 24 指定要分配的网段和子网掩码

[LSW4-ip-pool-dhcpv20]gateway-list 192.168.20.1 为dhcp配置要分配的网关

[LSW4-ip-pool-dhcpv20]dns-list 114.114.114.114 8.8.8.8 配置要分配的DNS

[LSW4-ip-pool-dhcpv20]lease day 9 配置默认租约时间

让vlan20的dhcp使用全局地址池来分配:他会根据网关从多个地址池中选取网关相同的地址池进行分配

[LSW4-Vlanif20]dhcp select global

DHCP的4个报文：

实验3：使用DHCP的中继代理，为vlan20和30分配IP

创建两个地址池：

[AR1]ip pool dhcpv20

[AR1-ip-pool-dhcpv20]network 192.168.2.0 mask 24

[AR1-ip-pool-dhcpv20]gateway-list 192.168.20.1

[AR1-ip-pool-dhcpv20]dns-list 114.114.114.114 8.8.8.8

[AR1-ip-pool-dhcpv20]lease day 9

[AR1]ip pool dhcpv30

[AR1-ip-pool-dhcpv30]network 192.168.30.0 mask 24

[AR1-ip-pool-dhcpv30]gateway-list 192.168.30.1

[AR1-ip-pool-dhcpv30]dns-list 114.114.114.114 8.8.8.8

[AR1-ip-pool-dhcpv30]lease day 9

配置三层交换的DHCP中继

[LSW4-Vlanif20]dhcp select relay 使用中继的方式来获取IP

[LSW4-Vlanif20]dhcp relay server-ip 12.0.0.2 指定dhcp的位置

[LSW4-Vlanif30]dhcp select relay

[LSW4-Vlanif30]dhcp relay server-ip 12.0.0.2

开启路由器的dhcp功能，及dhcp全局地址池的方式

[AR1]dhcp enable

[AR1-GigabitEthernet0/0/0]dhcp select global

实验4：以服务器组的方式让vlan10获得IP

[LSW4]dhcp server group test 为组dhcp组命名为test

[LSW4-dhcp-server-group-test]dhcp-server 12.0.0.2 在组里面添加dhcp服务器，可以添加多个

[LSW4-Vlanif10]dhcp select relay

[LSW4-Vlanif10]dhcp relay server-select test