DHCP中继配置
一、实验目的
通过实验掌握通过DHCP中继实现跨网络的DHCP服务
（1）掌握DHCP中继服务工作原理和工作方法
（2）掌握DHCP中继服务器配置过程
二、实验仪器设备及软件
两台路由器、两台PC
软件：Cisco Packet Tracer Student
三、实验原理
定义地址池 #ip dhcp pool pool0
定义网段 #net 192.168.0.0 255.255.255.0
定义网关 #default-router 192.168.0.1
定义DNS地址#dns-server 192.168.0.3
定义排除范围 #ip dhcp excluded-address 192.168.0.1 192.168.0.5
定义中继路由
Router1(config)#int f0/0
Router1(config-if)#ip helper-address 16.16.1.1
四、实验内容与步骤
（1）网络拓扑
（2）配置Router0和Router1端口IP并打开
Router0(config)#int f0/0
Router0(config-if)#ip add 192.168.0.1 255.255.255.0
Router0(config-if)#no sh
Router0(config)#int s1/0
Router0(config-if)#ip add 16.16.1.1 255.255.255.0
Router0(config-if)#no shu
Router1(config)#int f0/0
Router1(config-if)#ip add 172.16.0.1 255.255.255.0
Router1(config-if)#no sh
Router1(config)#int s1/0
Router1(config-if)#ip add 16.16.1.2 255.255.255.0
Router1(config-if)#clock rate 64000
Router1(config-if)#no shu
（3）配置动态路由
Router0(config)#router rip
Router0(config-router)#net 192.168.0.0
Router0(config-router)#net 16.16.1.0
Router1(config)#router rip
Router1(config-router)#net 16.16.1.0
Router1(config-router)#net 172.16.0.0
Router1(config-router)#
（4）配置地址池
//pool 0
Router0(config)#ip dhcp pool pool0
Router0(dhcp-config)#net 192.168.0.0 255.255.255.0
Router0(dhcp-config)#default-router 192.168.0.1
Router0(dhcp-config)#dns-server 192.168.0.3
Router0(dhcp-config)#option 150 ip 192.168.0.4
Router0(config)#ip dhcp excluded-address 192.168.0.1 192.168.0.5
//pool 1
Router0(config)#ip dhcp pool pool1
Router0(dhcp-config)#net 172.16.0.0 255.255.255.0
Router0(dhcp-config)#default-router 172.16.0.1
Router0(dhcp-config)#dns-server 192.168.0.3
Router0(dhcp-config)#option 150 ip 192.168.0.4
Router0(config)#ip dhcp excluded-address 172.16.0.1 172.16.0.5
Router0(config)#
（5）Router1负责中继，配置中继路由地址
Router1(config)#int f0/0
Router1(config-if)#ip helper-address 16.16.1.1
Router1(config-if)#no shu
五、实验结果与分析
（6）路由中继检测
Router0#show ip dhcp binding
IP address Client-ID/ Lease expiration Type
Hardware address
192.168.0.6 0000.0CA7.BBB6 -- Automatic
172.16.0.6 0090.0C7C.6308 -- Automatic
Router0#
Router1#show ip int
FastEthernet0/0 is up, line protocol is up (connected)
Internet address is 172.16.0.1/24
Broadcast address is 255.255.255.255
Address determined by setup command
MTU is 1500 bytes
Helper address is 16.16.1.1 //中继路由地址