思科模擬器CIsco　Packet　Tracer路由器上配置 DHCP

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1.技術目的
自動獲取IP地址

2.拓撲圖

3.配置PC
PC0和PC1自動獲取IP地址


4.配置路由器各個接口的IP地址
Router0

Router>en
Router#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#int f0/0
Router(config-if)#ip add 192.168.10.1 255.255.255.0
Router(config-if)#no shu

Router(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up

Router(config-if)#int s2/0
Router(config-if)#ip add 12.1.1.1 255.255.255.0
Router(config-if)#no shu

Router1

Router>en
Router#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#int s2/0
Router(config-if)#ip add 12.1.1.2 255.255.255.0
Router(config-if)#no shu

Router(config-if)#
%LINK-5-CHANGED: Interface Serial2/0, changed state to up
int f0/0
Router(config-if)#ip add 192.168
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial2/0, changed state to up
.11.1 255.255.255.0
Router(config-if)#no shu

5.配置路由器的靜態路由使得全網互通
Router0

Router(config)#ip route 192.168.11.0 255.255.255.0 12.1.1.2

Router1

Router(config)#ip route 192.168.10.0 255.255.255.0 12.1.1.1

6.配置DHCP
Router0

Router(config)#ip route 192.168.11.0 255.255.255.0 12.1.1.2
Router(config)#
Router(config)#ip dhcp pool pool1
Router(dhcp-config)#net
Router(dhcp-config)#network 192.168.10.0 255.255.255.0
Router(dhcp-config)#dns-server 218.2.135.1
Router(dhcp-config)#default-router 192.168.10.1
Router(dhcp-config)#exit
Router(config)#ip dhcp pool pool2
Router(dhcp-config)#net
Router(dhcp-config)#network 192.168.11.0 255.255.255.0
Router(dhcp-config)#dns-server 218.2.135.1
Router(dhcp-config)#default-router 192.168.11.1
Router(dhcp-config)#exit
Router(config)#ip dhcp excluded-address 192.168.10.1
Router(config)#no ip dhcp excluded-address 192.168.11.1

Router1（配置DHCP中繼）

Router2(config-if)#ip helper-address 12.1.1.1

7.網絡測試
如果兩臺PC自動獲得了192.168.10.0/24和192.168.11.0/24的地址那就成功了，要是獲得了一個169.254.0.0/16，那就說明哪裏出問題了

8.給大家留個問題吧 如果用三層交換機代替路由器應該怎麼做呢？