Router>enableRouter#conf tRouter(config)#interface f0/0Router(config-if)#ip add 192.168.1.254 255.25
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Router>enable
Router#conf t
Router(config)#interface f0/0
Router(config-if)#ip add 192.168.1.254 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#interface f0/1
Router(config-if)#ip add 192.168.2.254 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#exit
Router(config)#interface e0/1/0
Router(config-if)#ip address 200.1.1.1 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#exit
Router(config)#hostname dhcp1
dhcp1(config)#ip dhcp excluded-address 192.168.1.1 192.168.1.50 排除地址段
dhcp1(config)#ip dhcp pool p1 建立地址池P1
dhcp1(dhcp-config)#network 192.168.1.0 255.255.255.0 定义分配的地址段
dhcp1(dhcp-config)#de
dhcp1(dhcp-config)#default-router 192.168.1.254 定义网关
dhcp1(dhcp-config)#dns
dhcp1(dhcp-config)#dns-server 8.8.8.8 定义DNS服务器地址
dhcp1(dhcp-config)#exit
检验Pc0和PC1是否自动获取IP地址，点击DHCP查看结果。
实验二：
DHCP2路由器：
Router>en
Router#conf t
Router(config)#interface f0/0
Router(config-if)#ip address 200.1.1.2 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#exit
Router(config)#hostname dhcp2
dhcp2(config)#
dhcp2(config)#ip route 192.168.2.0 255.255.255.0 200.1.1.1
dhcp2(config)#ip dhcp pool p2
dhcp2(dhcp-config)#network 192.168.2.0 255.255.255.0
dhcp2(dhcp-config)#default-router 192.168.2.254
dhcp2(dhcp-config)#dns-server 222.222.222.222
在DHCP1上做DHCP中继：
dhcp1(config)#interface f0/1
dhcp1(config-if)#
dhcp1(config-if)#ip helper-address 200.1.1.2
dhcp1(config-if)#
检验Pc2和PC3是否自动获取IP地址，点击DHCP查看结果。
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